Updated to version 13.0.0

Added V2 Shared API's infrastructure
Added request coalescing
Added rate limiting admission logic
Fixed some rate limiting issues

.cursor/rules/cryptoexchange-net.mdc

@@ -0,0 +1,92 @@
+---
+description: Conventions for cross-exchange C# code using CryptoExchange.Net Shared API V2 capabilities.
+globs:
+  - "**/*.cs"
+  - "**/*.csproj"
+alwaysApply: false
+---
+
+# CryptoExchange.Net conventions
+
+CryptoExchange.Net is the base dependency for exchange-specific libraries. Install Binance.Net, Bybit.Net, JK.OKX.Net, or another exchange library; use `CryptoClients.Net` when the application needs the bundle.
+
+## Use Shared API V2
+
+For new cross-exchange code, use the fine-grained interfaces in `CryptoExchange.Net.SharedApis` and each API surface's `.SharedApi` property:
+
+```csharp
+using CryptoExchange.Net.SharedApis;
+
+IGetTickerRest binance = new BinanceRestClient().SpotApi.SharedApi;
+IGetTickerRest okx = new OKXRestClient().UnifiedApi.SharedApi;
+
+var symbol = new SharedSymbol(TradingMode.Spot, "BTC", "USDT");
+var result = await binance.GetTickerAsync(new GetTickerRequest(symbol));
+```
+
+Use one capability per operation, such as `IGetTickerRest`, `IGetOrderBookRest`, `IPlaceSpotOrderRest`, or `ISubscribeTradesSocket`. Do not use a broad V1 interface for new code. `.SharedClient` remains only for incremental V1 migration.
+
+## Capability discovery
+
+When the exchange and API surface are known, assign the typed `.SharedApi` to the required capability. When selection is dynamic, use an exchange-wide `I[Exchange]SharedApiClient` and a strongly typed reference:
+
+```csharp
+var match = sharedClient.GetCapability(
+    SharedCapabilities.Orders.Futures.PlaceOrder.Rest,
+    TradingMode.PerpetualLinear);
+
+if (match is not null)
+    await match.Capability.PlaceFuturesOrderAsync(request);
+```
+
+`GetCapability` returns one preferred match or `null`; `GetCapabilities` returns all matches. Specify `TradingMode` when multiple API surfaces may implement the same capability. A `SharedCapabilities` reference is a lookup key, not proof of exchange support.
+
+## Symbols and parameters
+
+Use `SharedSymbol` instead of native strings such as `BTCUSDT`. The exchange library performs formatting.
+
+Capability presence does not imply support for every request property. For dynamic code, inspect `match.Options.RequestParameterRules`, `ExchangeParameterRules`, and `SupportedTradingModes`. Supply exchange-specific values through the request's `ExchangeParameters`.
+
+## Transports and results
+
+- Transport-agnostic capabilities return `IExchangeCallResult<T>`.
+- `...Rest` capabilities return `HttpResult<T>`.
+- socket command capabilities return `QueryResult<T>`.
+- `ISubscribe...Socket` capabilities return `WebSocketResult<UpdateSubscription>`.
+
+Use `.Rest` or `.Socket` on capability references when the transport matters. Otherwise exchange-wide lookup honors `PreferredTransport`, normally REST. Always check `.Success` before `.Data` and include `.Exchange` in multi-exchange logs.
+
+## Concurrent aggregation
+
+```csharp
+var clients = new IGetTickerRest[] { binance, okx, bybit };
+var tasks = clients.Select(x =>
+    x.GetTickerAsync(new GetTickerRequest(symbol)));
+var results = await Task.WhenAll(tasks);
+```
+
+Reuse clients through dependency injection and run independent exchange calls concurrently.
+
+## V2 semantics
+
+- `GetTickerAsync` and `GetAllTickersAsync` return `SharedTicker` for spot and futures.
+- WebSocket order updates use `SharedSpotOrderUpdate` and `SharedFuturesOrderUpdate`.
+- `ICloseFullPosition` closes the entire position; use an order capability for partial closes.
+- Each exchange supports a subset of capabilities and parameter combinations.
+
+## Hard rules
+
+- Never install CryptoExchange.Net alone and expect exchange endpoints.
+- Never pass exchange-native models or symbols through shared services.
+- Never assume a capability or request field is supported; resolve and inspect it.
+- Never use `.Result` or `.Wait()`.
+- Never instantiate exchange clients per request.
+- Prefer `Task.WhenAll` for independent cross-exchange calls.
+- Prefer `.SharedApi` and fine-grained V2 interfaces for new code.
+
+## Reference
+
+- `AGENTS.md` for fuller examples
+- `docs/ai-api-map.md` for the V2 interface map
+- `docs/SHARED_API_V2_MIGRATION.md` for V1 migration details
+- `llms-full.txt` for expanded AI context

.github/copilot-instructions.md

@@ -0,0 +1,70 @@
+# Copilot Instructions for CryptoExchange.Net
+
+CryptoExchange.Net is the base library behind exchange-specific C#/.NET clients such as Binance.Net, Bybit.Net, OKX.Net, Kraken.Net, and Coinbase.Net.
+
+## Package choice
+
+Do not install CryptoExchange.Net alone to call an exchange. Install the exchange-specific package, or use `CryptoClients.Net` for the full bundle. For single-exchange code, prefer that library's native client. For portable multi-exchange code, use `CryptoExchange.Net.SharedApis`.
+
+## Generate Shared API V2 code
+
+Use fine-grained V2 capabilities through `.SharedApi`:
+
+```csharp
+using CryptoExchange.Net.SharedApis;
+
+IGetTickerRest binance = new BinanceRestClient().SpotApi.SharedApi;
+IGetTickerRest okx = new OKXRestClient().UnifiedApi.SharedApi;
+
+var symbol = new SharedSymbol(TradingMode.Spot, "BTC", "USDT");
+var result = await binance.GetTickerAsync(new GetTickerRequest(symbol));
+```
+
+Choose the interface for the operation: for example, `IGetTickerRest`, `IGetOrderBookRest`, `IPlaceSpotOrderRest`, `ICancelFuturesOrderRest`, or `ISubscribeTradesSocket`. V1 broad interfaces remain on `.SharedClient` for migration, but new code should use `.SharedApi`.
+
+Use `SharedSymbol`; do not hard-code exchange-native symbol formatting in shared code.
+
+## Runtime capability selection
+
+When the API surface is known, assign its typed `.SharedApi` directly. When support or the API surface is selected at runtime, use the exchange-wide `I[Exchange]SharedApiClient`:
+
+```csharp
+var match = sharedClient.GetCapability(
+    SharedCapabilities.Orders.Futures.PlaceOrder.Rest,
+    TradingMode.PerpetualLinear);
+
+if (match is null)
+    return;
+
+var result = await match.Capability.PlaceFuturesOrderAsync(request);
+```
+
+`GetCapability` returns one preferred `SharedCapabilityResolution<T>` or `null`; `GetCapabilities` returns all matching implementations. Include `TradingMode` when an exchange can expose multiple futures surfaces. `SharedCapabilities` entries are lookup references, not guarantees of support.
+
+Before constructing dynamic requests, inspect `match.Options.RequestParameterRules`, `ExchangeParameterRules`, and `SupportedTradingModes`. A capability may exist while a particular request field is unsupported.
+
+## Results and transports
+
+- Transport-agnostic operation: `IExchangeCallResult<T>`
+- REST capability: `HttpResult<T>`
+- WebSocket command capability: `QueryResult<T>`
+- WebSocket subscription capability: `WebSocketResult<UpdateSubscription>`
+
+Select `.Rest` or `.Socket` when transport-specific behavior matters. Otherwise exchange-wide selection uses `PreferredTransport`, normally REST. Always check `.Success` before `.Data`; use `.Error` and `.Exchange` for diagnostics.
+
+## Current V2 semantics
+
+- Ticker operations are `GetTickerAsync` and `GetAllTickersAsync`, returning `SharedTicker` for both spot and futures.
+- Socket order streams use `SharedSpotOrderUpdate` and `SharedFuturesOrderUpdate`.
+- `ICloseFullPosition` closes a complete position, not a partial quantity.
+- Exchange support varies by operation, transport, trading mode, and request parameter.
+
+## Engineering conventions
+
+- Reuse clients through dependency injection.
+- Use `await`; never use `.Result` or `.Wait()`.
+- Use `Task.WhenAll` for independent requests across exchanges.
+- Keep exchange-native models out of portable services.
+- Do not infer feature support from a broad interface or request model.
+
+See `AGENTS.md`, `docs/ai-api-map.md`, and `docs/SHARED_API_V2_MIGRATION.md` for expanded guidance.

AGENTS.md

@@ -0,0 +1,227 @@
+---
+name: cryptoexchange-net
+description: Use CryptoExchange.Net Shared API V2 abstractions when generating C#/.NET code for multiple cryptocurrency exchanges, including arbitrage, routing, portfolio aggregation, exchange-agnostic bots, comparison tools, and new exchange-library implementations.
+---
+
+# CryptoExchange.Net Skill
+
+## When to use
+
+CryptoExchange.Net is the base library behind exchange-specific libraries such as Binance.Net, Bybit.Net, OKX.Net, Kraken.Net, and Coinbase.Net. Do not install it alone to call an exchange.
+
+Choose one of these approaches:
+
+1. One exchange: install and use that exchange's library directly.
+2. Multiple exchanges: install the required exchange libraries and use `CryptoExchange.Net.SharedApis` V2 capabilities.
+3. All exchanges in one package: install `CryptoClients.Net` and use its combined clients and shared capability lookup.
+
+For new cross-exchange code, use Shared API V2. V1 aggregate interfaces remain available through `.SharedClient` for incremental migration.
+
+## Installation
+
+```bash
+dotnet add package Binance.Net
+dotnet add package JK.OKX.Net
+dotnet add package Bybit.Net
+```
+
+Or install the bundle:
+
+```bash
+dotnet add package CryptoClients.Net
+```
+
+## Core pattern: fine-grained capabilities
+
+Each exchange API surface exposes a typed `.SharedApi` aggregate. Assign it to the capability for the single operation being used:
+
+```csharp
+using Binance.Net.Clients;
+using OKX.Net.Clients;
+using Bybit.Net.Clients;
+using CryptoExchange.Net.SharedApis;
+
+IGetTickerRest binance = new BinanceRestClient().SpotApi.SharedApi;
+IGetTickerRest okx = new OKXRestClient().UnifiedApi.SharedApi;
+IGetTickerRest bybit = new BybitRestClient().V5Api.SharedApi;
+
+var symbol = new SharedSymbol(TradingMode.Spot, "BTC", "USDT");
+var result = await binance.GetTickerAsync(new GetTickerRequest(symbol));
+
+if (!result.Success)
+    Console.WriteLine($"[{result.Exchange}] {result.Error}");
+else
+    Console.WriteLine($"[{result.Exchange}] {result.Data!.LastPrice}");
+```
+
+V2 interfaces describe operations, not broad feature groups. Examples include `IGetTickerRest`, `IGetOrderBookRest`, `IPlaceSpotOrderRest`, `ICancelFuturesOrderRest`, and `ISubscribeTradesSocket`. An exchange may implement one operation without implementing adjacent operations.
+
+## Shared symbols
+
+Use `SharedSymbol`; never pass exchange-native symbol strings to shared requests:
+
+```csharp
+var spot = new SharedSymbol(TradingMode.Spot, "BTC", "USDT");
+var linearPerpetual = new SharedSymbol(
+    TradingMode.PerpetualLinear,
+    "BTC",
+    "USDT");
+```
+
+Each exchange library converts the shared symbol to its native format. For unusual exchange asset names, configure asset aliases.
+
+## Known surface versus runtime selection
+
+Use the typed `.SharedApi` surface when the exchange and API are known. This is the simplest and most discoverable approach:
+
+```csharp
+IPlaceSpotOrderRest orders = restClient.SpotApi.SharedApi;
+```
+
+For runtime selection, inject the exchange-wide `I[Exchange]SharedApiClient` registered by `services.Add[Exchange](...)`. Resolve a capability with the strongly typed `SharedCapabilities` catalog:
+
+```csharp
+var match = sharedClient.GetCapability(
+    SharedCapabilities.Orders.Futures.PlaceOrder.Rest,
+    TradingMode.PerpetualLinear);
+
+if (match is null)
+    return; // This exchange/API/mode does not provide the operation.
+
+var result = await match.Capability.PlaceFuturesOrderAsync(request);
+```
+
+`GetCapability` returns one `SharedCapabilityResolution<T>` containing `Capability` and `Options`, or `null` if no supported implementation matches. `GetCapabilities` returns every match on that exchange-wide client. Always specify `TradingMode` when multiple spot, linear, inverse, or delivery surfaces could match.
+
+`SharedCapabilities` references identify interface types; they do not guarantee that an exchange implements the operation and do not send a request.
+
+## Transport selection and result types
+
+Some commands have three interfaces:
+
+- Transport-agnostic, such as `IPlaceSpotOrder`, returns `IExchangeCallResult<T>`.
+- REST-specific, such as `IPlaceSpotOrderRest`, returns `HttpResult<T>`.
+- socket-specific, such as `IPlaceSpotOrderSocket`, returns `QueryResult<T>`.
+
+Socket subscription capabilities such as `ISubscribeTickerSocket` return `WebSocketResult<UpdateSubscription>`.
+
+Use `.Rest` or `.Socket` on a capability reference when transport matters. Without a transport filter, exchange-wide lookup uses `PreferredTransport`, configured through the exchange's `SharedApi.PreferredTransport` option and normally defaulting to REST.
+
+Always check `.Success` before `.Data`. Use `.Error` for failures and the result or capability `.Exchange` value for multi-exchange logging.
+
+## Inspect parameter support
+
+The presence of a capability does not mean every shared request property is accepted by every exchange. Inspect its `CapabilityOptions`:
+
+- `RequestParameterRules`: whether each shared request field is `Required`, `Optional`, or `NotSupported`.
+- `ExchangeParameterRules`: required or optional exchange-specific values supplied through the request's `ExchangeParameters`.
+- `SupportedTradingModes`: the trading modes supported by this implementation.
+
+```csharp
+var match = sharedClient.GetCapability(
+    SharedCapabilities.Orders.Futures.PlaceOrder.Rest,
+    TradingMode.PerpetualLinear);
+
+var leverageRule = match?.Options.RequestParameterRules
+    .FirstOrDefault(x => x.Name == nameof(PlaceFuturesOrderRequest.Leverage));
+```
+
+Do not infer support from the request model alone. Handle a `null` resolution and exchange-specific parameter rules before issuing dynamic trading calls.
+
+## Common capabilities
+
+- Market data: `IGetTickerRest`, `IGetAllTickersRest`, `IGetOrderBookRest`, `IGetKlinesRest`, `IGetRecentTradesRest`; ticker, trade, kline, and order-book socket subscriptions.
+- Trading: fine-grained spot and futures place, edit, cancel, get, open-order, closed-order, and order-update capabilities.
+- Account: balances, positions, user trades, fees, deposits, withdrawals, and transfers.
+- Futures data: funding, open interest, leverage, mark price, and index price capabilities.
+
+Check the typed exchange Shared API surface or use capability lookup instead of assuming universal support.
+
+## Multi-exchange aggregation
+
+Run independent exchange requests concurrently:
+
+```csharp
+var clients = new IGetTickerRest[] { binance, okx, bybit };
+var symbol = new SharedSymbol(TradingMode.Spot, "BTC", "USDT");
+
+var tasks = clients.Select(client =>
+    client.GetTickerAsync(new GetTickerRequest(symbol)));
+var results = await Task.WhenAll(tasks);
+
+foreach (var result in results.Where(x => x.Success))
+    Console.WriteLine($"{result.Exchange}: {result.Data!.LastPrice}");
+```
+
+Reuse clients through dependency injection; do not instantiate them per request.
+
+## Dependency injection
+
+Each exchange library provides `services.Add[Exchange](...)`. Registration includes its native clients, V1 shared interfaces, V2 operation capabilities, and exchange-wide shared client.
+
+Inject a capability directly only when the container has one intended implementation:
+
+```csharp
+public sealed class TickerService(IGetTickerRest ticker)
+{
+    public Task<HttpResult<SharedTicker>> GetAsync(
+        SharedSymbol symbol,
+        CancellationToken ct = default)
+        => ticker.GetTickerAsync(new GetTickerRequest(symbol), ct);
+}
+```
+
+If multiple exchanges or multiple API surfaces register the same capability, inject the exchange-specific shared client and select its typed API property or call `GetCapability`. Plain single-service resolution does not express which implementation you want.
+
+For the bundle, use `services.AddCryptoClients(...)`. CryptoClients.Net provides `IExchangeSharedApiClient` for capability lookup across exchanges.
+
+## V1 migration
+
+V1 `.SharedClient` facades and broad interfaces such as `ISpotTickerRestClient` remain available. Migrate one operation at a time:
+
+```csharp
+// V1
+await restClient.SpotApi.SharedClient.GetSpotTickerAsync(request);
+
+// V2
+await restClient.SpotApi.SharedApi.GetTickerAsync(request);
+```
+
+Important semantic changes:
+
+- V2 ticker methods are `GetTickerAsync` and `GetAllTickersAsync` and return `SharedTicker` for both spot and futures.
+- WebSocket order updates use `SharedSpotOrderUpdate` and `SharedFuturesOrderUpdate`; REST order retrieval keeps the ordinary order models.
+- `ICloseFullPosition` closes the complete position. Use an order capability for partial closes where supported.
+- Transport-agnostic operations return `IExchangeCallResult<T>`; select the REST or socket interface when code needs a transport-specific result.
+
+See `docs/SHARED_API_V2_MIGRATION.md` for detailed mappings.
+
+## Common pitfalls
+
+- Do not install `CryptoExchange.Net` alone and expect exchange endpoints.
+- Do not use `.SharedClient` for new V2 code; use `.SharedApi` and fine-grained capabilities.
+- Do not mix exchange-native request or response models into cross-exchange services.
+- Do not assume capability presence or request-parameter support; resolve and inspect it.
+- Do not rely on preferred transport when REST or socket semantics matter.
+- Do not block with `.Result` or `.Wait()`; use async calls throughout.
+- Do not query exchanges sequentially when requests are independent.
+
+## Implementing a new exchange library
+
+- Derive API clients from `RestApiClient` and `SocketApiClient`.
+- Follow the exchange credentials and options patterns used by existing libraries.
+- Implement the relevant fine-grained V2 capability interfaces on typed Shared API classes.
+- Publish accurate `CapabilityOptions`, including supported trading modes and request/exchange parameter rules.
+- Register REST/socket Shared APIs and the exchange-wide shared client with the library's DI extension.
+- Retain V1 facades only where compatibility with existing consumers is required.
+
+Use maintained exchange libraries such as Binance.Net and Bybit.Net as implementation references.
+
+## Reference
+
+- Source: https://github.com/JKorf/CryptoExchange.Net
+- Documentation: https://cryptoexchange.jkorf.dev/
+- Shared API migration: https://github.com/JKorf/CryptoExchange.Net/blob/master/docs/SHARED_API_V2_MIGRATION.md
+- Bundle: https://github.com/JKorf/CryptoClients.Net
+- Demo app: https://github.com/JKorf/CryptoManager.Net
+- Discord: https://discord.gg/MSpeEtSY8t

CryptoExchange.Net.Protobuf/Converters/Protobuf/ProtobufMessageAccessor.cs

@@ -1,530 +0,0 @@
-using CryptoExchange.Net.Converters.MessageParsing;
-using CryptoExchange.Net.Interfaces;
-using CryptoExchange.Net.Objects;
-using ProtoBuf;
-using ProtoBuf.Meta;
-using System;
-using System.Diagnostics.CodeAnalysis;
-using System.IO;
-using System.Runtime.InteropServices.ComTypes;
-using System.Text;
-using System.Text.Json;
-using System.Threading.Tasks;
-
-namespace CryptoExchange.Net.Converters.Protobuf
-{
-    /// <summary>
-    /// System.Text.Json message accessor
-    /// </summary>
-#if NET5_0_OR_GREATER
-    public abstract class ProtobufMessageAccessor<
-        [DynamicallyAccessedMembers(
-#if NET8_0_OR_GREATER
-        DynamicallyAccessedMemberTypes.NonPublicConstructors |
-        DynamicallyAccessedMemberTypes.PublicFields |
-        DynamicallyAccessedMemberTypes.NonPublicFields |
-        DynamicallyAccessedMemberTypes.NonPublicNestedTypes |
-        DynamicallyAccessedMemberTypes.PublicProperties |
-        DynamicallyAccessedMemberTypes.NonPublicProperties |
-#endif
-        DynamicallyAccessedMemberTypes.PublicNestedTypes |
-        DynamicallyAccessedMemberTypes.NonPublicMethods |
-        DynamicallyAccessedMemberTypes.PublicMethods
-        )]
-    TIntermediateType> : IMessageAccessor
-#else
-    public abstract class ProtobufMessageAccessor<TIntermediateType> : IMessageAccessor
-#endif
-    {
-        /// <summary>
-        /// The intermediate deserialization object
-        /// </summary>
-        protected TIntermediateType? _intermediateType;
-        /// <summary>
-        /// Runtime type model
-        /// </summary>
-        protected RuntimeTypeModel _model;
-
-        /// <inheritdoc />
-        public bool IsValid { get; set; }
-
-        /// <inheritdoc />
-        public abstract bool OriginalDataAvailable { get; }
-
-        /// <inheritdoc />
-        public object? Underlying => _intermediateType;
-
-        /// <summary>
-        /// ctor
-        /// </summary>
-        public ProtobufMessageAccessor(RuntimeTypeModel model)
-        {
-            _model = model;
-        }
-
-        /// <inheritdoc />
-        public NodeType? GetNodeType()
-        {
-            throw new NotImplementedException();
-        }
-
-        /// <inheritdoc />
-        public NodeType? GetNodeType(MessagePath path)
-        {
-            if (_intermediateType == null)
-                throw new InvalidOperationException("Data not read");
-
-            object? value = _intermediateType;
-            foreach (var step in path)
-            {
-                if (value == null)
-                    break;
-
-                if (step.Type == 0)
-                {
-                    // array index
-                }
-                else if (step.Type == 1)
-                {
-                    // property value
-#pragma warning disable IL2075 // Type is already annotated
-                    value = value.GetType().GetProperty(step.Property!)?.GetValue(value);
-#pragma warning restore
-                }
-                else
-                {
-                    // property name
-                }
-            }
-
-            if (value == null)
-                return null;
-
-            var valueType = value.GetType();
-            if (valueType.IsArray)
-                return NodeType.Array;
-
-            if (IsSimple(valueType))
-                return NodeType.Value;
-
-            return NodeType.Object;
-        }
-
-        private static bool IsSimple(Type type)
-        {
-            if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable<>))
-            {
-                // nullable type, check if the nested type is simple.
-                return IsSimple(type.GetGenericArguments()[0]);
-            }
-            return type.IsPrimitive
-              || type.IsEnum
-              || type == typeof(string)
-              || type == typeof(decimal);
-        }
-
-
-        /// <inheritdoc />
-#if NET5_0_OR_GREATER
-        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2075:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
-#endif
-        public T? GetValue<T>(MessagePath path)
-        {
-            if (_intermediateType == null)
-                throw new InvalidOperationException("Data not read");
-
-            object? value = _intermediateType;
-            foreach(var step in path)
-            {
-                if (value == null)
-                    break;
-
-                if (step.Type == 0)
-                {
-                    // array index
-                }
-                else if (step.Type == 1)
-                {
-                    // property value
-#pragma warning disable IL2075 // Type is already annotated
-                    value = value.GetType().GetProperty(step.Property!)?.GetValue(value);
-#pragma warning restore
-                }
-                else
-                {
-                    // property name
-                }
-            }
-
-            return (T?)value;
-        }
-
-        /// <inheritdoc />
-        public T?[]? GetValues<T>(MessagePath path)
-        {
-            throw new NotImplementedException();
-        }
-
-        /// <inheritdoc />
-        public abstract string GetOriginalString();
-
-        /// <inheritdoc />
-        public abstract void Clear();
-
-        /// <inheritdoc />
-#if NET5_0_OR_GREATER
-        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2092:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
-        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2095:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
-#endif
-        public abstract CallResult<object> Deserialize(
-#if NET5_0_OR_GREATER
-            [DynamicallyAccessedMembers(
-#if NET8_0_OR_GREATER
-            DynamicallyAccessedMemberTypes.NonPublicConstructors |
-            DynamicallyAccessedMemberTypes.PublicFields |
-            DynamicallyAccessedMemberTypes.NonPublicFields |
-            DynamicallyAccessedMemberTypes.NonPublicNestedTypes |
-            DynamicallyAccessedMemberTypes.PublicProperties |
-            DynamicallyAccessedMemberTypes.NonPublicProperties |
-            DynamicallyAccessedMemberTypes.PublicConstructors |
-#endif
-            DynamicallyAccessedMemberTypes.PublicNestedTypes |
-            DynamicallyAccessedMemberTypes.NonPublicMethods |
-            DynamicallyAccessedMemberTypes.PublicMethods
-            )]
-#endif
-        Type type, MessagePath? path = null);
-
-        /// <inheritdoc />
-#if NET5_0_OR_GREATER
-        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2092:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
-        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2095:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
-#endif
-        public abstract CallResult<T> Deserialize<
-#if NET5_0_OR_GREATER
-        [DynamicallyAccessedMembers(
-#if NET8_0_OR_GREATER
-            DynamicallyAccessedMemberTypes.NonPublicConstructors |
-            DynamicallyAccessedMemberTypes.PublicFields |
-            DynamicallyAccessedMemberTypes.NonPublicFields |
-            DynamicallyAccessedMemberTypes.NonPublicNestedTypes |
-            DynamicallyAccessedMemberTypes.PublicProperties |
-            DynamicallyAccessedMemberTypes.NonPublicProperties |
-            DynamicallyAccessedMemberTypes.PublicConstructors |
-#endif
-            DynamicallyAccessedMemberTypes.PublicNestedTypes |
-            DynamicallyAccessedMemberTypes.NonPublicMethods |
-            DynamicallyAccessedMemberTypes.PublicMethods
-            )]
-#endif
-        T>(MessagePath? path = null);
-    }
-
-    /// <summary>
-    /// System.Text.Json stream message accessor
-    /// </summary>
-    public class ProtobufStreamMessageAccessor<
-#if NET5_0_OR_GREATER
-            [DynamicallyAccessedMembers(
-#if NET8_0_OR_GREATER
-            DynamicallyAccessedMemberTypes.NonPublicConstructors |
-            DynamicallyAccessedMemberTypes.PublicFields |
-            DynamicallyAccessedMemberTypes.NonPublicFields |
-            DynamicallyAccessedMemberTypes.NonPublicNestedTypes |
-            DynamicallyAccessedMemberTypes.PublicProperties |
-            DynamicallyAccessedMemberTypes.NonPublicProperties |
-            DynamicallyAccessedMemberTypes.PublicConstructors |
-#endif
-            DynamicallyAccessedMemberTypes.PublicNestedTypes |
-            DynamicallyAccessedMemberTypes.NonPublicMethods |
-            DynamicallyAccessedMemberTypes.PublicMethods
-            )]
-#endif
-    TIntermediate> : ProtobufMessageAccessor<TIntermediate>, IStreamMessageAccessor
-    {
-        private Stream? _stream;
-
-        /// <inheritdoc />
-        public override bool OriginalDataAvailable => _stream?.CanSeek == true;
-
-        /// <summary>
-        /// ctor
-        /// </summary>
-        public ProtobufStreamMessageAccessor(RuntimeTypeModel model) : base(model)
-        {
-        }
-
-        /// <inheritdoc />
-#if NET5_0_OR_GREATER
-        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2092:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
-        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2095:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
-#endif
-        public override CallResult<object> Deserialize(
-#if NET5_0_OR_GREATER
-            [DynamicallyAccessedMembers(
-#if NET8_0_OR_GREATER
-            DynamicallyAccessedMemberTypes.NonPublicConstructors |
-            DynamicallyAccessedMemberTypes.PublicFields |
-            DynamicallyAccessedMemberTypes.NonPublicFields |
-            DynamicallyAccessedMemberTypes.NonPublicNestedTypes |
-            DynamicallyAccessedMemberTypes.PublicProperties |
-            DynamicallyAccessedMemberTypes.NonPublicProperties |
-            DynamicallyAccessedMemberTypes.PublicConstructors |
-#endif
-            DynamicallyAccessedMemberTypes.PublicNestedTypes |
-            DynamicallyAccessedMemberTypes.NonPublicMethods |
-            DynamicallyAccessedMemberTypes.PublicMethods
-            )]
-#endif
-        Type type, MessagePath? path = null)
-        {
-            try
-            {
-                var result = _model.Deserialize(type, _stream);
-                return new CallResult<object>(result);
-            }
-            catch (Exception ex)
-            {
-                return new CallResult<object>(new DeserializeError("Protobuf deserialization failed: " + ex.Message, ex));
-            }
-        }
-
-        /// <inheritdoc />
-#if NET5_0_OR_GREATER
-        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2092:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
-        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2095:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
-#endif
-        public override CallResult<T> Deserialize<            
-#if NET5_0_OR_GREATER
-            [DynamicallyAccessedMembers(
-#if NET8_0_OR_GREATER
-            DynamicallyAccessedMemberTypes.NonPublicConstructors |
-            DynamicallyAccessedMemberTypes.PublicFields |
-            DynamicallyAccessedMemberTypes.NonPublicFields |
-            DynamicallyAccessedMemberTypes.NonPublicNestedTypes |
-            DynamicallyAccessedMemberTypes.PublicProperties |
-            DynamicallyAccessedMemberTypes.NonPublicProperties |
-            DynamicallyAccessedMemberTypes.PublicConstructors |
-#endif
-            DynamicallyAccessedMemberTypes.PublicNestedTypes |
-            DynamicallyAccessedMemberTypes.NonPublicMethods |
-            DynamicallyAccessedMemberTypes.PublicMethods
-            )]
-#endif
-        T>(MessagePath? path = null)
-        {
-            try
-            {
-                var result = _model.Deserialize<T>(_stream);
-                return new CallResult<T>(result);
-            }
-            catch(Exception ex)
-            {
-                return new CallResult<T>(new DeserializeError("Protobuf deserialization failed: " + ex.Message, ex));
-            }
-        }
-
-        /// <inheritdoc />
-        public Task<CallResult> Read(Stream stream, bool bufferStream)
-        {
-            if (bufferStream && stream is not MemoryStream)
-            {
-                // We need to be buffer the stream, and it's not currently a seekable stream, so copy it to a new memory stream
-                _stream = new MemoryStream();
-                stream.CopyTo(_stream);
-                _stream.Position = 0;
-            }
-            else if (bufferStream)
-            {
-                // We need to buffer the stream, and the current stream is seekable, store as is
-                _stream = stream;
-            }
-            else
-            {
-                // We don't need to buffer the stream, so don't bother keeping the reference
-            }
-
-            try
-            {
-                _intermediateType = _model.Deserialize<TIntermediate>(_stream);
-                IsValid = true;
-                return Task.FromResult(CallResult.SuccessResult);
-            }
-            catch (Exception ex)
-            {
-                // Not a json message
-                IsValid = false;
-                return Task.FromResult(new CallResult(new DeserializeError("Protobuf deserialization failed: " + ex.Message, ex)));
-            }
-        }
-
-        /// <inheritdoc />
-        public override string GetOriginalString()
-        {
-            if (_stream is null)
-                throw new NullReferenceException("Stream not initialized");
-
-            _stream.Position = 0;
-            using var textReader = new StreamReader(_stream, Encoding.UTF8, false, 1024, true);
-            return textReader.ReadToEnd();
-        }
-
-        /// <inheritdoc />
-        public override void Clear()
-        {
-            _stream?.Dispose();
-            _stream = null;
-            _intermediateType = default;
-        }
-
-    }
-
-    /// <summary>
-    /// Protobuf byte message accessor
-    /// </summary>
-    public class ProtobufByteMessageAccessor<
-#if NET5_0_OR_GREATER
-            [DynamicallyAccessedMembers(
-#if NET8_0_OR_GREATER
-            DynamicallyAccessedMemberTypes.NonPublicConstructors |
-            DynamicallyAccessedMemberTypes.PublicFields |
-            DynamicallyAccessedMemberTypes.NonPublicFields |
-            DynamicallyAccessedMemberTypes.NonPublicNestedTypes |
-            DynamicallyAccessedMemberTypes.PublicProperties |
-            DynamicallyAccessedMemberTypes.NonPublicProperties |
-            DynamicallyAccessedMemberTypes.PublicConstructors |
-#endif
-            DynamicallyAccessedMemberTypes.PublicNestedTypes |
-            DynamicallyAccessedMemberTypes.NonPublicMethods |
-            DynamicallyAccessedMemberTypes.PublicMethods
-            )]
-#endif
-    TIntermediate> : ProtobufMessageAccessor<TIntermediate>, IByteMessageAccessor
-    {
-        private ReadOnlyMemory<byte> _bytes;
-
-        /// <summary>
-        /// ctor
-        /// </summary>
-        public ProtobufByteMessageAccessor(RuntimeTypeModel model) : base(model)
-        {
-        }
-
-        /// <inheritdoc />
-#if NET5_0_OR_GREATER
-        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2092:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
-        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2095:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
-#endif
-        public override CallResult<object> Deserialize(
-
-#if NET5_0_OR_GREATER
-            [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2092:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
-            [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2095:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
-            [DynamicallyAccessedMembers(
-#if NET8_0_OR_GREATER
-            DynamicallyAccessedMemberTypes.NonPublicConstructors |
-            DynamicallyAccessedMemberTypes.PublicFields |
-            DynamicallyAccessedMemberTypes.NonPublicFields |
-            DynamicallyAccessedMemberTypes.NonPublicNestedTypes |
-            DynamicallyAccessedMemberTypes.PublicProperties |
-            DynamicallyAccessedMemberTypes.NonPublicProperties |
-            DynamicallyAccessedMemberTypes.PublicConstructors |
-#endif
-            DynamicallyAccessedMemberTypes.PublicNestedTypes |
-            DynamicallyAccessedMemberTypes.NonPublicMethods |
-            DynamicallyAccessedMemberTypes.PublicMethods
-            )]
-#endif
-        Type type, MessagePath? path = null)
-        {
-            try
-            {
-                using var stream = new MemoryStream(_bytes.ToArray());
-                stream.Position = 0;
-                var result = _model.Deserialize(type, stream);
-                return new CallResult<object>(result);
-            }
-            catch (Exception ex)
-            {
-                return new CallResult<object>(new DeserializeError("Protobuf deserialization failed: " + ex.Message, ex));
-            }
-        }
-
-        /// <inheritdoc />
-#if NET5_0_OR_GREATER
-        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2092:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
-        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2095:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
-#endif
-#if NET5_0_OR_GREATER
-        public override CallResult<T> Deserialize<
-            [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2092:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
-            [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2095:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
-            [DynamicallyAccessedMembers(
-#if NET8_0_OR_GREATER
-            DynamicallyAccessedMemberTypes.NonPublicConstructors |
-            DynamicallyAccessedMemberTypes.PublicFields |
-            DynamicallyAccessedMemberTypes.NonPublicFields |
-            DynamicallyAccessedMemberTypes.NonPublicNestedTypes |
-            DynamicallyAccessedMemberTypes.PublicProperties |
-            DynamicallyAccessedMemberTypes.NonPublicProperties |
-            DynamicallyAccessedMemberTypes.PublicConstructors |
-#endif
-            DynamicallyAccessedMemberTypes.PublicNestedTypes |
-            DynamicallyAccessedMemberTypes.NonPublicMethods |
-            DynamicallyAccessedMemberTypes.PublicMethods
-            )]
-        T>(MessagePath? path = null)
-#else
-        public override CallResult<T> Deserialize<T>(MessagePath? path = null)
-#endif
-        {
-            try
-            {
-                var result = _model.Deserialize<T>(_bytes);
-                return new CallResult<T>(result);
-            }
-            catch (Exception ex)
-            {
-                return new CallResult<T>(new DeserializeError("Protobuf deserialization failed: " + ex.Message, ex));
-            }
-        }
-
-        /// <inheritdoc />
-        public CallResult Read(ReadOnlyMemory<byte> data)
-        {
-            _bytes = data;
-
-            try
-            {
-                _intermediateType = _model.Deserialize<TIntermediate>(data);
-                IsValid = true;
-                return CallResult.SuccessResult;
-            }
-            catch (Exception ex)
-            {
-                // Not a json message
-                IsValid = false;
-                return new CallResult(new DeserializeError("Protobuf deserialization failed: " + ex.Message, ex));
-            }
-        }
-
-        /// <inheritdoc />
-        public override string GetOriginalString() =>
-            // NetStandard 2.0 doesn't support GetString from a ReadonlySpan<byte>, so use ToArray there instead
-#if NETSTANDARD2_0
-            Encoding.UTF8.GetString(_bytes.ToArray());
-#else
-            Encoding.UTF8.GetString(_bytes.Span);
-#endif
-
-        /// <inheritdoc />
-        public override bool OriginalDataAvailable => true;
-
-        /// <inheritdoc />
-        public override void Clear()
-        {
-            _bytes = null;
-            _intermediateType = default;
-        }
-    }
-}

CryptoExchange.Net.Protobuf/Converters/Protobuf/ProtobufMessageSerializer.cs

@@ -1,53 +0,0 @@
-using CryptoExchange.Net.Interfaces;
-using ProtoBuf.Meta;
-using System.Diagnostics.CodeAnalysis;
-using System.IO;
-using System.Reflection;
-
-namespace CryptoExchange.Net.Converters.Protobuf
-{
-    /// <inheritdoc />
-    public class ProtobufMessageSerializer : IByteMessageSerializer
-    {
-        private RuntimeTypeModel _model;
-
-        /// <summary>
-        /// ctor
-        /// </summary>
-        public ProtobufMessageSerializer(RuntimeTypeModel model)
-        {
-            _model = model;
-        }
-
-        /// <inheritdoc />
-#if NET5_0_OR_GREATER
-        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2092:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
-        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2095:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
-#endif
-#if NET5_0_OR_GREATER
-        public byte[] Serialize<
-            [DynamicallyAccessedMembers(
-#if NET8_0_OR_GREATER
-            DynamicallyAccessedMemberTypes.NonPublicConstructors |
-            DynamicallyAccessedMemberTypes.PublicFields |
-            DynamicallyAccessedMemberTypes.NonPublicFields |
-            DynamicallyAccessedMemberTypes.NonPublicNestedTypes |
-            DynamicallyAccessedMemberTypes.PublicProperties |
-            DynamicallyAccessedMemberTypes.NonPublicProperties |
-            DynamicallyAccessedMemberTypes.PublicConstructors |
-#endif
-            DynamicallyAccessedMemberTypes.PublicNestedTypes |
-            DynamicallyAccessedMemberTypes.NonPublicMethods |
-            DynamicallyAccessedMemberTypes.PublicMethods
-            )]
-        T>(T message)
-#else
-        public byte[] Serialize<T>(T message)
-#endif
-        {
-            using var memoryStream = new MemoryStream();
-            _model.Serialize(memoryStream, message);
-            return memoryStream.ToArray();
-        }
-    }
-}

CryptoExchange.Net.Protobuf/CryptoExchange.Net.Protobuf.csproj

@@ -1,47 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-  <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netstandard2.1;net8.0;net9.0;net10.0</TargetFrameworks>
-  </PropertyGroup>
-  <PropertyGroup>
-    <PackageId>CryptoExchange.Net.Protobuf</PackageId>
-    <Authors>JKorf</Authors>
-    <Description>Protobuf support for CryptoExchange.Net</Description>
-    <PackageVersion>10.0.1</PackageVersion>
-    <AssemblyVersion>10.0.1</AssemblyVersion>
-    <FileVersion>10.0.1</FileVersion>
-    <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
-    <PackageTags>CryptoExchange;CryptoExchange.Net</PackageTags>
-    <RepositoryType>git</RepositoryType>
-    <RepositoryUrl>https://github.com/JKorf/CryptoExchange.Net.git</RepositoryUrl>
-    <PackageProjectUrl>https://github.com/JKorf/CryptoExchange.Net/tree/master/CryptoExchange.Net.Protobuf</PackageProjectUrl>
-    <NeutralLanguage>en</NeutralLanguage>
-    <PackageReadmeFile>README.md</PackageReadmeFile>
-    <PackageIcon>icon.png</PackageIcon>
-    <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
-    <PackageReleaseNotes>https://github.com/JKorf/CryptoExchange.Net?tab=readme-ov-file#release-notes</PackageReleaseNotes>
-    <Nullable>enable</Nullable>
-    <LangVersion>12.0</LangVersion>
-    <PackageLicenseExpression>MIT</PackageLicenseExpression>
-  </PropertyGroup>
-  <ItemGroup>
-    <None Include="..\CryptoExchange.Net\Icon\icon.png" Pack="true" PackagePath="\" />
-    <None Include="README.md" Pack="true" PackagePath="\" />
-  </ItemGroup>
-  <PropertyGroup Label="AOT" Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net7.0'))">
-    <IsAotCompatible>true</IsAotCompatible>
-  </PropertyGroup>
-  <PropertyGroup Label="Deterministic Build" Condition="'$(Configuration)' == 'Release'">
-    <PublishRepositoryUrl>true</PublishRepositoryUrl>
-    <IncludeSymbols>true</IncludeSymbols>
-    <SymbolPackageFormat>snupkg</SymbolPackageFormat>
-    <EmbedUntrackedSources>true</EmbedUntrackedSources>
-    <ContinuousIntegrationBuild>true</ContinuousIntegrationBuild>
-  </PropertyGroup>
-  <PropertyGroup>
-    <DocumentationFile>CryptoExchange.Net.Protobuf.xml</DocumentationFile>
-  </PropertyGroup>
-  <ItemGroup>
-    <PackageReference Include="CryptoExchange.Net" Version="10.0.2" />
-    <PackageReference Include="protobuf-net" Version="3.2.56" />
-  </ItemGroup>
-</Project>

CryptoExchange.Net.Protobuf/CryptoExchange.Net.Protobuf.xml

@@ -1,128 +0,0 @@
-<?xml version="1.0"?>
-<doc>
-    <assembly>
-        <name>CryptoExchange.Net.Protobuf</name>
-    </assembly>
-    <members>
-        <member name="T:CryptoExchange.Net.Converters.Protobuf.ProtobufMessageAccessor`1">
-            <summary>
-            System.Text.Json message accessor
-            </summary>
-        </member>
-        <member name="F:CryptoExchange.Net.Converters.Protobuf.ProtobufMessageAccessor`1._intermediateType">
-            <summary>
-            The intermediate deserialization object
-            </summary>
-        </member>
-        <member name="F:CryptoExchange.Net.Converters.Protobuf.ProtobufMessageAccessor`1._model">
-            <summary>
-            Runtime type model
-            </summary>
-        </member>
-        <member name="P:CryptoExchange.Net.Converters.Protobuf.ProtobufMessageAccessor`1.IsValid">
-            <inheritdoc />
-        </member>
-        <member name="P:CryptoExchange.Net.Converters.Protobuf.ProtobufMessageAccessor`1.OriginalDataAvailable">
-            <inheritdoc />
-        </member>
-        <member name="P:CryptoExchange.Net.Converters.Protobuf.ProtobufMessageAccessor`1.Underlying">
-            <inheritdoc />
-        </member>
-        <member name="M:CryptoExchange.Net.Converters.Protobuf.ProtobufMessageAccessor`1.#ctor(ProtoBuf.Meta.RuntimeTypeModel)">
-            <summary>
-            ctor
-            </summary>
-        </member>
-        <member name="M:CryptoExchange.Net.Converters.Protobuf.ProtobufMessageAccessor`1.GetNodeType">
-            <inheritdoc />
-        </member>
-        <member name="M:CryptoExchange.Net.Converters.Protobuf.ProtobufMessageAccessor`1.GetNodeType(CryptoExchange.Net.Converters.MessageParsing.MessagePath)">
-            <inheritdoc />
-        </member>
-        <member name="M:CryptoExchange.Net.Converters.Protobuf.ProtobufMessageAccessor`1.GetValue``1(CryptoExchange.Net.Converters.MessageParsing.MessagePath)">
-            <inheritdoc />
-        </member>
-        <member name="M:CryptoExchange.Net.Converters.Protobuf.ProtobufMessageAccessor`1.GetValues``1(CryptoExchange.Net.Converters.MessageParsing.MessagePath)">
-            <inheritdoc />
-        </member>
-        <member name="M:CryptoExchange.Net.Converters.Protobuf.ProtobufMessageAccessor`1.GetOriginalString">
-            <inheritdoc />
-        </member>
-        <member name="M:CryptoExchange.Net.Converters.Protobuf.ProtobufMessageAccessor`1.Clear">
-            <inheritdoc />
-        </member>
-        <member name="M:CryptoExchange.Net.Converters.Protobuf.ProtobufMessageAccessor`1.Deserialize(System.Type,System.Nullable{CryptoExchange.Net.Converters.MessageParsing.MessagePath})">
-            <inheritdoc />
-        </member>
-        <member name="M:CryptoExchange.Net.Converters.Protobuf.ProtobufMessageAccessor`1.Deserialize``1(System.Nullable{CryptoExchange.Net.Converters.MessageParsing.MessagePath})">
-            <inheritdoc />
-        </member>
-        <member name="T:CryptoExchange.Net.Converters.Protobuf.ProtobufStreamMessageAccessor`1">
-            <summary>
-            System.Text.Json stream message accessor
-            </summary>
-        </member>
-        <member name="P:CryptoExchange.Net.Converters.Protobuf.ProtobufStreamMessageAccessor`1.OriginalDataAvailable">
-            <inheritdoc />
-        </member>
-        <member name="M:CryptoExchange.Net.Converters.Protobuf.ProtobufStreamMessageAccessor`1.#ctor(ProtoBuf.Meta.RuntimeTypeModel)">
-            <summary>
-            ctor
-            </summary>
-        </member>
-        <member name="M:CryptoExchange.Net.Converters.Protobuf.ProtobufStreamMessageAccessor`1.Deserialize(System.Type,System.Nullable{CryptoExchange.Net.Converters.MessageParsing.MessagePath})">
-            <inheritdoc />
-        </member>
-        <member name="M:CryptoExchange.Net.Converters.Protobuf.ProtobufStreamMessageAccessor`1.Deserialize``1(System.Nullable{CryptoExchange.Net.Converters.MessageParsing.MessagePath})">
-            <inheritdoc />
-        </member>
-        <member name="M:CryptoExchange.Net.Converters.Protobuf.ProtobufStreamMessageAccessor`1.Read(System.IO.Stream,System.Boolean)">
-            <inheritdoc />
-        </member>
-        <member name="M:CryptoExchange.Net.Converters.Protobuf.ProtobufStreamMessageAccessor`1.GetOriginalString">
-            <inheritdoc />
-        </member>
-        <member name="M:CryptoExchange.Net.Converters.Protobuf.ProtobufStreamMessageAccessor`1.Clear">
-            <inheritdoc />
-        </member>
-        <member name="T:CryptoExchange.Net.Converters.Protobuf.ProtobufByteMessageAccessor`1">
-            <summary>
-            Protobuf byte message accessor
-            </summary>
-        </member>
-        <member name="M:CryptoExchange.Net.Converters.Protobuf.ProtobufByteMessageAccessor`1.#ctor(ProtoBuf.Meta.RuntimeTypeModel)">
-            <summary>
-            ctor
-            </summary>
-        </member>
-        <member name="M:CryptoExchange.Net.Converters.Protobuf.ProtobufByteMessageAccessor`1.Deserialize(System.Type,System.Nullable{CryptoExchange.Net.Converters.MessageParsing.MessagePath})">
-            <inheritdoc />
-        </member>
-        <member name="M:CryptoExchange.Net.Converters.Protobuf.ProtobufByteMessageAccessor`1.Deserialize``1(System.Nullable{CryptoExchange.Net.Converters.MessageParsing.MessagePath})">
-            <inheritdoc />
-        </member>
-        <member name="M:CryptoExchange.Net.Converters.Protobuf.ProtobufByteMessageAccessor`1.Read(System.ReadOnlyMemory{System.Byte})">
-            <inheritdoc />
-        </member>
-        <member name="M:CryptoExchange.Net.Converters.Protobuf.ProtobufByteMessageAccessor`1.GetOriginalString">
-            <inheritdoc />
-        </member>
-        <member name="P:CryptoExchange.Net.Converters.Protobuf.ProtobufByteMessageAccessor`1.OriginalDataAvailable">
-            <inheritdoc />
-        </member>
-        <member name="M:CryptoExchange.Net.Converters.Protobuf.ProtobufByteMessageAccessor`1.Clear">
-            <inheritdoc />
-        </member>
-        <member name="T:CryptoExchange.Net.Converters.Protobuf.ProtobufMessageSerializer">
-            <inheritdoc />
-        </member>
-        <member name="M:CryptoExchange.Net.Converters.Protobuf.ProtobufMessageSerializer.#ctor(ProtoBuf.Meta.RuntimeTypeModel)">
-            <summary>
-            ctor
-            </summary>
-        </member>
-        <member name="M:CryptoExchange.Net.Converters.Protobuf.ProtobufMessageSerializer.Serialize``1(``0)">
-            <inheritdoc />
-        </member>
-    </members>
-</doc>

CryptoExchange.Net.Protobuf/README.md

@@ -1,52 +0,0 @@
-# ![.CryptoExchange.Net](https://github.com/JKorf/CryptoExchange.Net/blob/ffcb7db8ff597c2f14982d68464015a748815580/CryptoExchange.Net/Icon/icon.png) CryptoExchange.Net.Proto  
-
-[![.NET](https://img.shields.io/github/actions/workflow/status/JKorf/CryptoExchange.Net/dotnet.yml?style=for-the-badge)](https://github.com/JKorf/CryptoExchange.Net/actions/workflows/dotnet.yml) [![Nuget downloads](https://img.shields.io/nuget/dt/CryptoExchange.Net.Protobuf.svg?style=for-the-badge)](https://www.nuget.org/packages/CryptoExchange.Net.Protobuf) ![License](https://img.shields.io/github/license/JKorf/CryptoExchange.Net?style=for-the-badge)
-
-Protobuf support for CryptoExchange.Net.
-
-## Release notes
-* Version 10.0.1 - 16 Dec 2025
-    * Updated CryptoExchange.Net version to 10.0.0, see https://github.com/JKorf/CryptoExchange.Net/releases/
-
-* Version 10.0.0 - 16 Dec 2025
-    * Updated CryptoExchange.Net version to 10.0.0, see https://github.com/JKorf/CryptoExchange.Net/releases/
-
-* Version 9.13.0 - 10 Nov 2025
-    * Updated CryptoExchange.Net version to 9.13.0, see https://github.com/JKorf/CryptoExchange.Net/releases/
-
-* Version 9.12.0 - 03 Nov 2025
-    * Updated CryptoExchange.Net version to 9.12.0, see https://github.com/JKorf/CryptoExchange.Net/releases/
-
-* Version 9.11.1 - 30 Oct 2025
-    * Updated CryptoExchange.Net version to 9.11.0, see https://github.com/JKorf/CryptoExchange.Net/releases/
-
-* Version 9.11.0 - 30 Oct 2025
-    * Updated CryptoExchange.Net version to 9.11.0, see https://github.com/JKorf/CryptoExchange.Net/releases/
-
-* Version 9.10.0 - 15 Oct 2025
-    * Updated CryptoExchange.Net version to 9.10.0, see https://github.com/JKorf/CryptoExchange.Net/releases/
-
-* Version 9.9.0 - 06 Oct 2025
-    * Updated CryptoExchange.Net version to 9.9.0, see https://github.com/JKorf/CryptoExchange.Net/releases/
-
-* Version 9.8.0 - 30 Sep 2025
-    * Updated CryptoExchange.Net version to 9.8.0, see https://github.com/JKorf/CryptoExchange.Net/releases/
-
-* Version 9.7.0 - 01 Sep 2025
-    * Updated CryptoExchange.Net version to 9.7.0, see https://github.com/JKorf/CryptoExchange.Net/releases/
-
-* Version 9.6.0 - 25 Aug 2025
-    * Updated CryptoExchange.Net version to 9.6.0
-
-* Version 9.5.0 - 19 Aug 2025
-    * Updated CryptoExchange.Net version to 9.5.0
-
-* Version 9.4.0 - 04 Aug 2025
-    * Updated CryptoExchange.Net to version 9.4.0, see https://github.com/JKorf/CryptoExchange.Net/releases/
-    * Updated protobuf-net package version to 3.2.56
-
-* Version 9.3.0 - 23 Jul 2025
-    * Updated CryptoExchange.Net to version 9.3.0, see https://github.com/JKorf/CryptoExchange.Net/releases/
-
-* Version 9.2.0 - 14 Jul 2025
-    * Initial release

CryptoExchange.Net.UnitTests/AsyncResetEventTests.cs

@@ -91,28 +91,25 @@ namespace CryptoExchange.Net.UnitTests
             var evnt = new AsyncResetEvent(false, true);
 
             var waiters = new List<Task<bool>>();
-            for(var i = 0; i < 10; i++)
+            for (var i = 0; i < 10; i++)
             {
                 waiters.Add(evnt.WaitAsync());
             }
 
-            List<bool>? results = null;
-            var resultsWaiter = Task.Run(async () =>
-            {
-                await Task.WhenAll(waiters);
-                results = waiters.Select(w => w.Result).ToList();
-            });
+            var remaining = waiters.ToList();
 
-            for(var i = 1; i <= 10; i++)
+            for (var i = 0; i < 10; i++)
             {
                 evnt.Set();
-                await Task.Delay(1); // Wait for the continuation.
-                Assert.That(10 - i == waiters.Count(w => w.Status != TaskStatus.RanToCompletion));
+
+                var completed = await Task.WhenAny(remaining);
+                Assert.That(await completed, Is.True);
+
+                remaining.Remove(completed);
+                Assert.That(remaining.Count(w => w.IsCompleted), Is.Zero);
             }
 
-            await resultsWaiter;
-
-            Assert.That(10 == results?.Count(r => r));
+            Assert.That(remaining, Is.Empty);
         }
 
         [Test]

CryptoExchange.Net.UnitTests/CallResultTests.cs

@@ -14,157 +14,41 @@ namespace CryptoExchange.Net.UnitTests
         [Test]
         public void TestBasicErrorCallResult()
         {
-            var result = new CallResult(new ServerError("TestError", ErrorInfo.Unknown));
+            var result = CallResult.Fail(new ServerError("TestError", ErrorInfo.Unknown));
 
             ClassicAssert.AreSame(result.Error!.ErrorCode, "TestError");
-            ClassicAssert.IsFalse(result);
             ClassicAssert.IsFalse(result.Success);
         }
 
         [Test]
         public void TestBasicSuccessCallResult()
         {
-            var result = new CallResult(null);
+            var result = CallResult.Ok();
 
             ClassicAssert.IsNull(result.Error);
-            Assert.That(result);
             Assert.That(result.Success);
         }
 
         [Test]
         public void TestCallResultError()
         {
-            var result = new CallResult<object>(new ServerError("TestError", ErrorInfo.Unknown));
+            var result = CallResult.Fail<object>(new ServerError("TestError", ErrorInfo.Unknown));
 
             ClassicAssert.AreSame(result.Error!.ErrorCode, "TestError");
             ClassicAssert.IsNull(result.Data);
-            ClassicAssert.IsFalse(result);
             ClassicAssert.IsFalse(result.Success);
         }
 
         [Test]
         public void TestCallResultSuccess()
         {
-            var result = new CallResult<object>(new object());
+            var result = CallResult.Ok<object>(new object());
 
             ClassicAssert.IsNull(result.Error);
             ClassicAssert.IsNotNull(result.Data);
-            Assert.That(result);
             Assert.That(result.Success);
         }
 
-        [Test]
-        public void TestCallResultSuccessAs()
-        {
-            var result = new CallResult<TestObjectResult>(new TestObjectResult());
-            var asResult = result.As<TestObject2>(result.Data.InnerData);
-
-            ClassicAssert.IsNull(asResult.Error);
-            ClassicAssert.IsNotNull(asResult.Data);
-            Assert.That(asResult.Data is not null);
-            Assert.That(asResult);
-            Assert.That(asResult.Success);
-        }
-
-        [Test]
-        public void TestCallResultErrorAs()
-        {
-            var result = new CallResult<TestObjectResult>(new ServerError("TestError", ErrorInfo.Unknown));
-            var asResult = result.As<TestObject2>(default);
-
-            ClassicAssert.IsNotNull(asResult.Error);
-            ClassicAssert.AreSame(asResult.Error!.ErrorCode, "TestError");
-            ClassicAssert.IsNull(asResult.Data);
-            ClassicAssert.IsFalse(asResult);
-            ClassicAssert.IsFalse(asResult.Success);
-        }
-
-        [Test]
-        public void TestCallResultErrorAsError()
-        {
-            var result = new CallResult<TestObjectResult>(new ServerError("TestError", ErrorInfo.Unknown));
-            var asResult = result.AsError<TestObject2>(new ServerError("TestError2", ErrorInfo.Unknown));
-
-            ClassicAssert.IsNotNull(asResult.Error);
-            ClassicAssert.AreSame(asResult.Error!.ErrorCode, "TestError2");
-            ClassicAssert.IsNull(asResult.Data);
-            ClassicAssert.IsFalse(asResult);
-            ClassicAssert.IsFalse(asResult.Success);
-        }
-
-        [Test]
-        public void TestWebCallResultErrorAsError()
-        {
-            var result = new WebCallResult<TestObjectResult>(new ServerError("TestError", ErrorInfo.Unknown));
-            var asResult = result.AsError<TestObject2>(new ServerError("TestError2", ErrorInfo.Unknown));
-
-            ClassicAssert.IsNotNull(asResult.Error);
-            ClassicAssert.AreSame(asResult.Error!.ErrorCode, "TestError2");
-            ClassicAssert.IsNull(asResult.Data);
-            ClassicAssert.IsFalse(asResult);
-            ClassicAssert.IsFalse(asResult.Success);
-        }
-
-        [Test]
-        public void TestWebCallResultSuccessAsError()
-        {
-            var result = new WebCallResult<TestObjectResult>(
-                System.Net.HttpStatusCode.OK,
-                HttpVersion.Version11,
-                new HttpResponseMessage().Headers,
-                TimeSpan.FromSeconds(1),
-                null,
-                "{}",
-                1,
-                "https://test.com/api",
-                null,
-                HttpMethod.Get,
-                new HttpRequestMessage().Headers,
-                ResultDataSource.Server,
-                new TestObjectResult(),
-                null);
-            var asResult = result.AsError<TestObject2>(new ServerError("TestError2", ErrorInfo.Unknown));
-
-            ClassicAssert.IsNotNull(asResult.Error);
-            Assert.That(asResult.Error!.ErrorCode == "TestError2");
-            Assert.That(asResult.ResponseStatusCode == System.Net.HttpStatusCode.OK);
-            Assert.That(asResult.ResponseTime == TimeSpan.FromSeconds(1));
-            Assert.That(asResult.RequestUrl == "https://test.com/api");
-            Assert.That(asResult.RequestMethod == HttpMethod.Get);
-            ClassicAssert.IsNull(asResult.Data);
-            ClassicAssert.IsFalse(asResult);
-            ClassicAssert.IsFalse(asResult.Success);
-        }
-
-        [Test]
-        public void TestWebCallResultSuccessAsSuccess()
-        {
-            var result = new WebCallResult<TestObjectResult>(
-                System.Net.HttpStatusCode.OK,
-                HttpVersion.Version11,
-                new HttpResponseMessage().Headers,
-                TimeSpan.FromSeconds(1),
-                null,
-                "{}",
-                1,
-                "https://test.com/api",
-                null,
-                HttpMethod.Get,
-                new HttpRequestMessage().Headers,
-                ResultDataSource.Server,
-                new TestObjectResult(),
-                null);
-            var asResult = result.As<TestObject2>(result.Data.InnerData);
-
-            ClassicAssert.IsNull(asResult.Error);
-            Assert.That(asResult.ResponseStatusCode == System.Net.HttpStatusCode.OK);
-            Assert.That(asResult.ResponseTime == TimeSpan.FromSeconds(1));
-            Assert.That(asResult.RequestUrl == "https://test.com/api");
-            Assert.That(asResult.RequestMethod == HttpMethod.Get);
-            ClassicAssert.IsNotNull(asResult.Data);
-            Assert.That(asResult);
-            Assert.That(asResult.Success);
-        }
     }
 
     public class TestObjectResult

CryptoExchange.Net.UnitTests/ClientTests/RestClientTests.cs

@@ -134,7 +134,7 @@ namespace CryptoExchange.Net.UnitTests.ClientTests
             client.ApiClient1.SetParameterPosition(httpMethod, pos);
             client.ApiClient1.SetNextResponse("{}", System.Net.HttpStatusCode.OK);
 
-            var result = await client.ApiClient1.GetResponseAsync<TestObject>(httpMethod, new ParameterCollection
+            var result = await client.ApiClient1.GetResponseAsync<TestObject>(httpMethod, new Parameters(new ParameterSerializationSettings())
             {
                 { "TestParam1", "Value1" },
                 { "TestParam2", 2 },
@@ -147,231 +147,5 @@ namespace CryptoExchange.Net.UnitTests.ClientTests
             Assert.That(result.RequestBody?.Contains("TestParam2") == true == (pos == HttpMethodParameterPosition.InBody));
             Assert.That((result.RequestUrl?.ToString().Contains("TestParam2")) == (pos == HttpMethodParameterPosition.InUri));
         }
-
-
-        [TestCase(1, 0.1)]
-        [TestCase(2, 0.1)]
-        [TestCase(5, 1)]
-        [TestCase(1, 2)]
-        public async Task PartialEndpointRateLimiterBasics(int requests, double perSeconds)
-        {
-            var rateLimiter = new RateLimitGate("Test");
-            rateLimiter.AddGuard(new RateLimitGuard(RateLimitGuard.PerHost, new PathStartFilter("/sapi/"), requests, TimeSpan.FromSeconds(perSeconds), RateLimitWindowType.Fixed));
-
-            var triggered = false;
-            rateLimiter.RateLimitTriggered += (x) => { triggered = true; };
-            var requestDefinition = new RequestDefinition("/sapi/v1/system/status", HttpMethod.Get);
-
-            for (var i = 0; i < requests + 1; i++)
-            {
-                var result1 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition, "https://test.com", "123", 1, RateLimitingBehaviour.Wait, null, default);
-                Assert.That(i == requests ? triggered : !triggered);
-            }
-            triggered = false;
-            await Task.Delay((int)Math.Round(perSeconds * 1000) + 10);
-            var result2 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition, "https://test.com", "123", 1, RateLimitingBehaviour.Wait, null, default);
-            Assert.That(!triggered);
-        }
-
-        [TestCase("/sapi/test1", true)]
-        [TestCase("/sapi/test2", true)]
-        [TestCase("/api/test1", false)]
-        [TestCase("sapi/test1", true)]
-        [TestCase("/sapi/", true)]
-        public async Task PartialEndpointRateLimiterEndpoints(string endpoint, bool expectLimiting)
-        {
-            var rateLimiter = new RateLimitGate("Test");
-            rateLimiter.AddGuard(new RateLimitGuard(RateLimitGuard.PerHost, new PathStartFilter("/sapi/"), 1, TimeSpan.FromSeconds(0.1), RateLimitWindowType.Fixed));
-
-            var requestDefinition = new RequestDefinition(endpoint, HttpMethod.Get);
-
-            RateLimitEvent? evnt = null;
-            rateLimiter.RateLimitTriggered += (x) => { evnt = x; };
-            for (var i = 0; i < 2; i++)
-            {
-                var result1 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition, "https://test.com", "123", 1, RateLimitingBehaviour.Wait, null, default);
-                bool expected = i == 1 ? expectLimiting ? evnt?.DelayTime > TimeSpan.Zero : evnt == null : evnt == null;
-                Assert.That(expected);
-            }
-        }
-
-        [TestCase("/sapi/", "/sapi/", true)]
-        [TestCase("/sapi/test", "/sapi/test", true)]
-        [TestCase("/sapi/test", "/sapi/test123", false)]
-        [TestCase("/sapi/test", "/sapi/", false)]
-        public async Task PartialEndpointRateLimiterEndpoints(string endpoint1, string endpoint2, bool expectLimiting)
-        {
-            var rateLimiter = new RateLimitGate("Test");
-            rateLimiter.AddGuard(new RateLimitGuard(RateLimitGuard.PerEndpoint, new PathStartFilter("/sapi/"), 1, TimeSpan.FromSeconds(0.1), RateLimitWindowType.Fixed));
-
-            var requestDefinition1 = new RequestDefinition(endpoint1, HttpMethod.Get);
-            var requestDefinition2 = new RequestDefinition(endpoint2, HttpMethod.Get);
-
-            RateLimitEvent? evnt = null;
-            rateLimiter.RateLimitTriggered += (x) => { evnt = x; };
-
-            var result1 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition1, "https://test.com", "123", 1, RateLimitingBehaviour.Wait, null, default);
-            Assert.That(evnt == null);
-            var result2 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition2, "https://test.com", "123", 1, RateLimitingBehaviour.Wait, null, default);
-            Assert.That(expectLimiting ? evnt != null : evnt == null);
-        }
-
-        [TestCase(1, 0.1)]
-        [TestCase(2, 0.1)]
-        [TestCase(5, 1)]
-        [TestCase(1, 2)]
-        public async Task EndpointRateLimiterBasics(int requests, double perSeconds)
-        {
-            var rateLimiter = new RateLimitGate("Test");
-            rateLimiter.AddGuard(new RateLimitGuard(RateLimitGuard.PerEndpoint, new PathStartFilter("/sapi/test"), requests, TimeSpan.FromSeconds(perSeconds), RateLimitWindowType.Fixed));
-
-            bool triggered = false;
-            rateLimiter.RateLimitTriggered += (x) => { triggered = true; };
-            var requestDefinition = new RequestDefinition("/sapi/test", HttpMethod.Get);
-
-            for (var i = 0; i < requests + 1; i++)
-            {
-                var result1 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition, "https://test.com", "123", 1, RateLimitingBehaviour.Wait, null, default);
-                Assert.That(i == requests ? triggered : !triggered);
-            }
-            triggered = false;
-            await Task.Delay((int)Math.Round(perSeconds * 1000) + 10);
-            var result2 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition, "https://test.com", "123", 1, RateLimitingBehaviour.Wait, null, default);
-            Assert.That(!triggered);
-        }
-
-        [TestCase("/", false)]
-        [TestCase("/sapi/test", true)]
-        [TestCase("/sapi/test/123", false)]
-        public async Task EndpointRateLimiterEndpoints(string endpoint, bool expectLimited)
-        {
-            var rateLimiter = new RateLimitGate("Test");
-            rateLimiter.AddGuard(new RateLimitGuard(RateLimitGuard.PerEndpoint, new ExactPathFilter("/sapi/test"), 1, TimeSpan.FromSeconds(0.1), RateLimitWindowType.Fixed));
-
-            var requestDefinition = new RequestDefinition(endpoint, HttpMethod.Get);
-
-            RateLimitEvent? evnt = null;
-            rateLimiter.RateLimitTriggered += (x) => { evnt = x; };
-            for (var i = 0; i < 2; i++)
-            {
-                var result1 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition, "https://test.com", "123", 1, RateLimitingBehaviour.Wait, null, default);
-                bool expected = i == 1 ? expectLimited ? evnt?.DelayTime > TimeSpan.Zero : evnt == null : evnt == null;
-                Assert.That(expected);
-            }
-        }
-
-        [TestCase("/", false)]
-        [TestCase("/sapi/test", true)]
-        [TestCase("/sapi/test2", true)]
-        [TestCase("/sapi/test23", false)]
-        public async Task EndpointRateLimiterMultipleEndpoints(string endpoint, bool expectLimited)
-        {
-            var rateLimiter = new RateLimitGate("Test");
-            rateLimiter.AddGuard(new RateLimitGuard(RateLimitGuard.PerEndpoint, new ExactPathsFilter(new[] { "/sapi/test", "/sapi/test2" }), 1, TimeSpan.FromSeconds(0.1), RateLimitWindowType.Fixed));
-            var requestDefinition = new RequestDefinition(endpoint, HttpMethod.Get);
-
-            RateLimitEvent? evnt = null;
-            rateLimiter.RateLimitTriggered += (x) => { evnt = x; };
-            for (var i = 0; i < 2; i++)
-            {
-                var result1 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition, "https://test.com", "123", 1, RateLimitingBehaviour.Wait, null, default);
-                bool expected = i == 1 ? expectLimited ? evnt?.DelayTime > TimeSpan.Zero : evnt == null : evnt == null;
-                Assert.That(expected);
-            }
-        }
-
-        [TestCase("123", "123", "/sapi/test", "/sapi/test", true)]
-        [TestCase("123", "456", "/sapi/test", "/sapi/test", false)]
-        [TestCase("123", "123", "/sapi/test", "/sapi/test2", true)]
-        [TestCase("123", "123", "/sapi/test2", "/sapi/test", true)]
-        [TestCase(null, "123", "/sapi/test", "/sapi/test", false)]
-        [TestCase("123", null, "/sapi/test", "/sapi/test", false)]
-        [TestCase(null, null, "/sapi/test", "/sapi/test", false)]
-        public async Task ApiKeyRateLimiterBasics(string key1, string key2, string endpoint1, string endpoint2, bool expectLimited)
-        {
-            var rateLimiter = new RateLimitGate("Test");
-            rateLimiter.AddGuard(new RateLimitGuard(RateLimitGuard.PerApiKey, new AuthenticatedEndpointFilter(true), 1, TimeSpan.FromSeconds(0.1), RateLimitWindowType.Sliding));
-            var requestDefinition1 = new RequestDefinition(endpoint1, HttpMethod.Get) { Authenticated = key1 != null };
-            var requestDefinition2 = new RequestDefinition(endpoint2, HttpMethod.Get) { Authenticated = key2 != null };
-
-            RateLimitEvent? evnt = null;
-            rateLimiter.RateLimitTriggered += (x) => { evnt = x; };
-
-            var result1 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition1, "https://test.com", key1, 1, RateLimitingBehaviour.Wait, null, default);
-            Assert.That(evnt == null);
-            var result2 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition2, "https://test.com", key2, 1, RateLimitingBehaviour.Wait, null, default);
-            Assert.That(expectLimited ? evnt != null : evnt == null);
-        }
-
-        [TestCase("/sapi/test", "/sapi/test", true)]
-        [TestCase("/sapi/test1", "/api/test2", true)]
-        [TestCase("/", "/sapi/test2", true)]
-        public async Task TotalRateLimiterBasics(string endpoint1, string endpoint2, bool expectLimited)
-        {
-            var rateLimiter = new RateLimitGate("Test");
-            rateLimiter.AddGuard(new RateLimitGuard(RateLimitGuard.PerHost, Array.Empty<IGuardFilter>(), 1, TimeSpan.FromSeconds(0.1), RateLimitWindowType.Fixed));
-            var requestDefinition1 = new RequestDefinition(endpoint1, HttpMethod.Get);
-            var requestDefinition2 = new RequestDefinition(endpoint2, HttpMethod.Get) { Authenticated = true };
-
-            RateLimitEvent? evnt = null;
-            rateLimiter.RateLimitTriggered += (x) => { evnt = x; };
-
-            var result1 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition1, "https://test.com", "123", 1, RateLimitingBehaviour.Wait, null, default);
-            Assert.That(evnt == null);
-            var result2 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition2, "https://test.com", null, 1, RateLimitingBehaviour.Wait, null, default);
-            Assert.That(expectLimited ? evnt != null : evnt == null);
-        }
-
-        [TestCase("https://test.com", "/sapi/test", "https://test.com", "/sapi/test", true)]
-        [TestCase("https://test2.com", "/sapi/test", "https://test.com", "/sapi/test", false)]
-        [TestCase("https://test.com", "/sapi/test", "https://test2.com", "/sapi/test", false)]
-        [TestCase("https://test.com", "/sapi/test", "https://test.com", "/sapi/test2", true)]
-        public async Task HostRateLimiterBasics(string host1, string endpoint1, string host2, string endpoint2, bool expectLimited)
-        {
-            var rateLimiter = new RateLimitGate("Test");
-            rateLimiter.AddGuard(new RateLimitGuard(RateLimitGuard.PerHost, new HostFilter("https://test.com"), 1, TimeSpan.FromSeconds(0.1), RateLimitWindowType.Fixed));
-            var requestDefinition1 = new RequestDefinition(endpoint1, HttpMethod.Get);
-            var requestDefinition2 = new RequestDefinition(endpoint2, HttpMethod.Get) { Authenticated = true };
-
-            RateLimitEvent? evnt = null;
-            rateLimiter.RateLimitTriggered += (x) => { evnt = x; };
-
-            var result1 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition1, host1, "123", 1, RateLimitingBehaviour.Wait, null, default);
-            Assert.That(evnt == null);
-            var result2 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition1, host2, "123", 1, RateLimitingBehaviour.Wait, null, default);
-            Assert.That(expectLimited ? evnt != null : evnt == null);
-        }
-
-        [TestCase("https://test.com", "https://test.com", true)]
-        [TestCase("https://test2.com", "https://test.com", false)]
-        [TestCase("https://test.com", "https://test2.com", false)]
-        public async Task ConnectionRateLimiterBasics(string host1, string host2, bool expectLimited)
-        {
-            var rateLimiter = new RateLimitGate("Test");
-            rateLimiter.AddGuard(new RateLimitGuard(RateLimitGuard.PerHost, new LimitItemTypeFilter(RateLimitItemType.Connection), 1, TimeSpan.FromSeconds(0.1), RateLimitWindowType.Fixed));
-
-            RateLimitEvent? evnt = null;
-            rateLimiter.RateLimitTriggered += (x) => { evnt = x; };
-
-            var result1 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Connection, new RequestDefinition("1", HttpMethod.Get), host1, "123", 1, RateLimitingBehaviour.Wait, null, default);
-            Assert.That(evnt == null);
-            var result2 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Connection, new RequestDefinition("1", HttpMethod.Get), host2, "123", 1, RateLimitingBehaviour.Wait, null, default);
-            Assert.That(expectLimited ? evnt != null : evnt == null);
-        }
-
-        [Test]
-        public async Task ConnectionRateLimiterCancel()
-        {
-            var rateLimiter = new RateLimitGate("Test");
-            rateLimiter.AddGuard(new RateLimitGuard(RateLimitGuard.PerHost, new LimitItemTypeFilter(RateLimitItemType.Connection), 1, TimeSpan.FromSeconds(10), RateLimitWindowType.Fixed));
-
-            RateLimitEvent? evnt = null;
-            rateLimiter.RateLimitTriggered += (x) => { evnt = x; };
-            var ct = new CancellationTokenSource(TimeSpan.FromSeconds(0.2));
-
-            var result1 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Connection, new RequestDefinition("1", HttpMethod.Get), "https://test.com", "123", 1, RateLimitingBehaviour.Wait, null, ct.Token);
-            var result2 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Connection, new RequestDefinition("1", HttpMethod.Get), "https://test.com", "123", 1, RateLimitingBehaviour.Wait, null, ct.Token);
-            Assert.That(result2.Error, Is.TypeOf<CancellationRequestedError>());
-        }
     }
 }

CryptoExchange.Net.UnitTests/ClientTests/SocketClientTests.cs

@@ -110,7 +110,7 @@ namespace CryptoExchange.Net.UnitTests.ClientTests
             var result = await client.ApiClient1.SubscribeToUpdatesAsync<TestObject>(x => {}, false, default);
 
             // act
-            await client.UnsubscribeAsync(result.Data);
+            await client.UnsubscribeAsync(result.Data!);
 
             // assert
             Assert.That(socket.Connected == false);
@@ -138,6 +138,68 @@ namespace CryptoExchange.Net.UnitTests.ClientTests
             Assert.That(socket2.Connected == false);
         }
 
+        [TestCase()]
+        public async Task BatchedSubscription_Should_NotExceedIndividualCombineTarget()
+        {
+            // arrange
+            var client = new TestSocketClient(options =>
+            {
+                options.SocketSubscriptionsCombineTarget = 10;
+                options.SocketIndividualSubscriptionCombineTarget = 10;
+            });
+            TestHelpers.ConfigureSocketClient(client, "wss://localhost");
+
+            // act
+            await client.ApiClient1.SubscribeToUpdatesAsync<TestObject>(x => { }, false, default, individualSubscriptionCount: 6);
+            TestHelpers.ConfigureSocketClient(client, "wss://localhost");
+            await client.ApiClient1.SubscribeToUpdatesAsync<TestObject>(x => { }, false, default, individualSubscriptionCount: 6);
+
+            // assert
+            Assert.That(client.ApiClient1._socketConnections.Count == 2);
+            Assert.That(client.ApiClient1._socketConnections.Values.All(connection => connection.Subscriptions.Sum(subscription => subscription.IndividualSubscriptionCount) <= 10));
+        }
+
+        [TestCase()]
+        public async Task BatchedSubscription_FullIndividualConnection_Should_NotPreventEligibleConnectionReuse()
+        {
+            // arrange
+            var client = new TestSocketClient(options =>
+            {
+                options.SocketSubscriptionsCombineTarget = 5;
+                options.SocketIndividualSubscriptionCombineTarget = 10;
+            });
+            TestHelpers.ConfigureSocketClient(client, "wss://localhost");
+            await client.ApiClient1.SubscribeToUpdatesAsync<TestObject>(x => { }, false, default);
+            await client.ApiClient1.SubscribeToUpdatesAsync<TestObject>(x => { }, false, default);
+
+            TestHelpers.ConfigureSocketClient(client, "wss://localhost");
+            await client.ApiClient1.SubscribeToUpdatesAsync<TestObject>(x => { }, false, default, individualSubscriptionCount: 10);
+
+            TestHelpers.ConfigureSocketClient(client, "wss://localhost");
+
+            // act
+            await client.ApiClient1.SubscribeToUpdatesAsync<TestObject>(x => { }, false, default);
+
+            // assert
+            Assert.That(
+                client.ApiClient1._socketConnections.Count,
+                Is.EqualTo(2),
+                "The eligible connection should be reused instead of opening a new connection after selecting a full individual-subscription connection");
+
+            var fullConnection = client.ApiClient1._socketConnections.Values
+                .Single(connection => connection.Subscriptions.Sum(subscription => subscription.IndividualSubscriptionCount) == 10);
+            Assert.That(
+                fullConnection.UserSubscriptionCount,
+                Is.EqualTo(1),
+                "The full connection should not receive the normal subscription");
+
+            var eligibleConnection = client.ApiClient1._socketConnections.Values.Single(connection => connection != fullConnection);
+            Assert.That(
+                eligibleConnection.UserSubscriptionCount,
+                Is.EqualTo(3),
+                "The existing eligible connection should receive the normal subscription");
+        }
+
         [TestCase()]
         public async Task ErrorResponse_ShouldNot_ConfirmSubscription()
         {

CryptoExchange.Net.UnitTests/ConverterTests/ArrayConverterTests.cs

@@ -62,6 +62,31 @@ namespace CryptoExchange.Net.UnitTests.ConverterTests
             Assert.That(deserialized.Prop8!.Prop31, Is.EqualTo(5));
             Assert.That(deserialized.Prop8.Prop32, Is.EqualTo("101"));
         }
+
+        [TestCase("[\"4.803E-5\",\"9.623e-4\",\"0.0010025\"]", 0.00004803, 0.0009623, 0.0010025)]
+        [TestCase("[\"81251.5\",\"1E+2\",\"-2.5E-3\"]", 81251.5, 100, -0.0025)]
+        [TestCase("[4.803E-5,9.623e-4,0.0010025]", 0.00004803, 0.0009623, 0.0010025)]
+        public void TestArrayConverterDecimalInScientificNotation(string json, decimal expected1, decimal expected2, decimal expected3)
+        {
+            // Some exchanges send small prices as strings in scientific notation, for example the
+            // Kucoin futures kline stream: "candles":["1789830000","4.803E-5","4.807E-5",...]
+            var deserialized = JsonSerializer.Deserialize<TestDecimal>(json);
+
+            Assert.That(deserialized!.Prop1, Is.EqualTo(expected1));
+            Assert.That(deserialized.Prop2, Is.EqualTo(expected2));
+            Assert.That(deserialized.Prop3, Is.EqualTo(expected3));
+        }
+    }
+
+    [JsonConverter(typeof(ArrayConverter<TestDecimal>))]
+    public record TestDecimal
+    {
+        [ArrayProperty(0)]
+        public decimal Prop1 { get; set; }
+        [ArrayProperty(1)]
+        public decimal? Prop2 { get; set; }
+        [ArrayProperty(2)]
+        public decimal Prop3 { get; set; }
     }
 
     [JsonConverter(typeof(ArrayConverter<Test>))]

CryptoExchange.Net.UnitTests/ConverterTests/BoolConverterTests.cs

@@ -25,6 +25,17 @@ namespace CryptoExchange.Net.UnitTests.ConverterTests
             Assert.That(output!.Value == expected);
         }
 
+        [TestCase(1, true)]
+        [TestCase(2, true)]
+        [TestCase(0, false)]
+        [TestCase(-1, false)]
+        public void TestBoolConverterInts(int value, bool? expected)
+        {
+            var val = $"{value}";
+            var output = JsonSerializer.Deserialize<STJBoolObject>($"{{ \"Value\": {val} }}", SerializerOptions.WithConverters(new TestSerializerContext()));
+            Assert.That(output!.Value == expected);
+        }
+
         [TestCase("1", true)]
         [TestCase("true", true)]
         [TestCase("yes", true)]

CryptoExchange.Net.UnitTests/ConverterTests/DateTimeConverterTests.cs

@@ -15,6 +15,7 @@ namespace CryptoExchange.Net.UnitTests.ConverterTests
         [TestCase("1620777600000")]
         [TestCase("2021-05-12T00:00:00.000Z")]
         [TestCase("2021-05-12T00:00:00.000000000Z")]
+        [TestCase("2021-05-12 00:00:00.000000+00:00:00")]
         [TestCase("0.000000", true)]
         [TestCase("0", true)]
         [TestCase("", true)]

CryptoExchange.Net.UnitTests/ExchangeSymbolCacheTests.cs

@@ -37,8 +37,8 @@ namespace CryptoExchange.Net.UnitTests
             var symbols = CreateTestSymbols();
 
             // act
-            ExchangeSymbolCache.UpdateSymbolInfo(topicId, symbols);
-            var hasCached = ExchangeSymbolCache.HasCached(topicId);
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Env", null, symbols);
+            var hasCached = ExchangeSymbolCache.HasCached(topicId, "Env", null);
 
             // assert
             Assert.That(hasCached, Is.True);
@@ -52,14 +52,14 @@ namespace CryptoExchange.Net.UnitTests
             var symbols = CreateTestSymbols();
 
             // act
-            ExchangeSymbolCache.UpdateSymbolInfo(topicId, symbols);
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Env", null, symbols);
 
             // assert
-            Assert.That(ExchangeSymbolCache.SupportsSymbol(topicId, "BTCUSDT"), Is.True);
-            Assert.That(ExchangeSymbolCache.SupportsSymbol(topicId, "ETHUSDT"), Is.True);
-            Assert.That(ExchangeSymbolCache.SupportsSymbol(topicId, "BTCEUR"), Is.True);
-            Assert.That(ExchangeSymbolCache.SupportsSymbol(topicId, "ETHBTC"), Is.True);
-            Assert.That(ExchangeSymbolCache.SupportsSymbol(topicId, "XRPUSDT"), Is.True);
+            Assert.That(ExchangeSymbolCache.SupportsSymbol(topicId, "Env", null, "BTCUSDT"), Is.True);
+            Assert.That(ExchangeSymbolCache.SupportsSymbol(topicId, "Env", null, "ETHUSDT"), Is.True);
+            Assert.That(ExchangeSymbolCache.SupportsSymbol(topicId, "Env", null, "BTCEUR"), Is.True);
+            Assert.That(ExchangeSymbolCache.SupportsSymbol(topicId, "Env", null, "ETHBTC"), Is.True);
+            Assert.That(ExchangeSymbolCache.SupportsSymbol(topicId, "Env", null, "XRPUSDT"), Is.True);
         }
 
         [Test]
@@ -78,13 +78,13 @@ namespace CryptoExchange.Net.UnitTests
             };
 
             // act
-            ExchangeSymbolCache.UpdateSymbolInfo(topicId, initialSymbols);
-            ExchangeSymbolCache.UpdateSymbolInfo(topicId, updatedSymbols);
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Env", null, initialSymbols);
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Env", null, updatedSymbols);
 
             // assert - should still have only the initial symbol since less than 60 minutes passed
-            Assert.That(ExchangeSymbolCache.SupportsSymbol(topicId, "BTCUSDT"), Is.True);
+            Assert.That(ExchangeSymbolCache.SupportsSymbol(topicId, "Env", null, "BTCUSDT"), Is.True);
             // The second update should not have been applied
-            Assert.That(ExchangeSymbolCache.SupportsSymbol(topicId, "ETHUSDT"), Is.False);
+            Assert.That(ExchangeSymbolCache.SupportsSymbol(topicId, "Env", null, "ETHUSDT"), Is.False);
         }
 
         [Test]
@@ -95,8 +95,8 @@ namespace CryptoExchange.Net.UnitTests
             var symbols = Array.Empty<SharedSpotSymbol>();
 
             // act
-            ExchangeSymbolCache.UpdateSymbolInfo(topicId, symbols);
-            var hasCached = ExchangeSymbolCache.HasCached(topicId);
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Env", null, symbols);
+            var hasCached = ExchangeSymbolCache.HasCached(topicId, "Env", null);
 
             // assert
             Assert.That(hasCached, Is.False);
@@ -109,7 +109,7 @@ namespace CryptoExchange.Net.UnitTests
             var nonExistentTopic = "NonExistent_" + Guid.NewGuid();
 
             // act
-            var result = ExchangeSymbolCache.HasCached(nonExistentTopic);
+            var result = ExchangeSymbolCache.HasCached(nonExistentTopic, "Env", null);
 
             // assert
             Assert.That(result, Is.False);
@@ -121,10 +121,10 @@ namespace CryptoExchange.Net.UnitTests
             // arrange
             var topicId = "ExchangeWithData";
             var symbols = CreateTestSymbols();
-            ExchangeSymbolCache.UpdateSymbolInfo(topicId, symbols);
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Env", null, symbols);
 
             // act
-            var result = ExchangeSymbolCache.HasCached(topicId);
+            var result = ExchangeSymbolCache.HasCached(topicId, "Env", null);
 
             // assert
             Assert.That(result, Is.True);
@@ -135,10 +135,10 @@ namespace CryptoExchange.Net.UnitTests
         {
             // arrange
             var topicId = "ExchangeNoData";
-            ExchangeSymbolCache.UpdateSymbolInfo(topicId, Array.Empty<SharedSpotSymbol>());
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Env", null, Array.Empty<SharedSpotSymbol>());
 
             // act
-            var result = ExchangeSymbolCache.HasCached(topicId);
+            var result = ExchangeSymbolCache.HasCached(topicId, "Env", null);
 
             // assert
             Assert.That(result, Is.False);
@@ -150,10 +150,10 @@ namespace CryptoExchange.Net.UnitTests
             // arrange
             var topicId = "ExchangeSupports";
             var symbols = CreateTestSymbols();
-            ExchangeSymbolCache.UpdateSymbolInfo(topicId, symbols);
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Env", null, symbols);
 
             // act
-            var result = ExchangeSymbolCache.SupportsSymbol(topicId, "BTCUSDT");
+            var result = ExchangeSymbolCache.SupportsSymbol(topicId, "Env", null, "BTCUSDT");
 
             // assert
             Assert.That(result, Is.True);
@@ -165,10 +165,10 @@ namespace CryptoExchange.Net.UnitTests
             // arrange
             var topicId = "ExchangeNoSupport";
             var symbols = CreateTestSymbols();
-            ExchangeSymbolCache.UpdateSymbolInfo(topicId, symbols);
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Env", null, symbols);
 
             // act
-            var result = ExchangeSymbolCache.SupportsSymbol(topicId, "LINKUSDT");
+            var result = ExchangeSymbolCache.SupportsSymbol(topicId, "Env", null, "LINKUSDT");
 
             // assert
             Assert.That(result, Is.False);
@@ -181,7 +181,7 @@ namespace CryptoExchange.Net.UnitTests
             var nonExistentTopic = "NonExistent_" + Guid.NewGuid();
 
             // act
-            var result = ExchangeSymbolCache.SupportsSymbol(nonExistentTopic, "BTCUSDT");
+            var result = ExchangeSymbolCache.SupportsSymbol(nonExistentTopic, "Env", null, "BTCUSDT");
 
             // assert
             Assert.That(result, Is.False);
@@ -193,11 +193,11 @@ namespace CryptoExchange.Net.UnitTests
             // arrange
             var topicId = "ExchangeSharedSymbol";
             var symbols = CreateTestSymbols();
-            ExchangeSymbolCache.UpdateSymbolInfo(topicId, symbols);
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Env", null, symbols);
             var sharedSymbol = new SharedSymbol(TradingMode.Spot, "BTC", "USDT");
 
             // act
-            var result = ExchangeSymbolCache.SupportsSymbol(topicId, sharedSymbol);
+            var result = ExchangeSymbolCache.SupportsSymbol(topicId, "Env", null, sharedSymbol);
 
             // assert
             Assert.That(result, Is.True);
@@ -209,11 +209,11 @@ namespace CryptoExchange.Net.UnitTests
             // arrange
             var topicId = "ExchangeNoSharedSymbol";
             var symbols = CreateTestSymbols();
-            ExchangeSymbolCache.UpdateSymbolInfo(topicId, symbols);
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Env", null, symbols);
             var sharedSymbol = new SharedSymbol(TradingMode.Spot, "LINK", "USDT");
 
             // act
-            var result = ExchangeSymbolCache.SupportsSymbol(topicId, sharedSymbol);
+            var result = ExchangeSymbolCache.SupportsSymbol(topicId, "Env", null, sharedSymbol);
 
             // assert
             Assert.That(result, Is.False);
@@ -225,11 +225,11 @@ namespace CryptoExchange.Net.UnitTests
             // arrange
             var topicId = "ExchangeDifferentMode";
             var symbols = CreateTestSymbols();
-            ExchangeSymbolCache.UpdateSymbolInfo(topicId, symbols);
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Env", null, symbols);
             var sharedSymbol = new SharedSymbol(TradingMode.PerpetualLinear, "BTC", "USDT");
 
             // act
-            var result = ExchangeSymbolCache.SupportsSymbol(topicId, sharedSymbol);
+            var result = ExchangeSymbolCache.SupportsSymbol(topicId, "Env", null, sharedSymbol);
 
             // assert
             Assert.That(result, Is.False);
@@ -243,7 +243,7 @@ namespace CryptoExchange.Net.UnitTests
             var sharedSymbol = new SharedSymbol(TradingMode.Spot, "BTC", "USDT");
 
             // act
-            var result = ExchangeSymbolCache.SupportsSymbol(nonExistentTopic, sharedSymbol);
+            var result = ExchangeSymbolCache.SupportsSymbol(nonExistentTopic, "Env", null, sharedSymbol);
 
             // assert
             Assert.That(result, Is.False);
@@ -255,10 +255,10 @@ namespace CryptoExchange.Net.UnitTests
             // arrange
             var topicId = "ExchangeBaseAsset";
             var symbols = CreateTestSymbols();
-            ExchangeSymbolCache.UpdateSymbolInfo(topicId, symbols);
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Env", null, symbols);
 
             // act
-            var result = ExchangeSymbolCache.GetSymbolsForBaseAsset(topicId, "BTC");
+            var result = ExchangeSymbolCache.GetSymbolsForBaseAsset(topicId, "Env", null, "BTC");
 
             // assert
             Assert.That(result, Is.Not.Null);
@@ -273,10 +273,10 @@ namespace CryptoExchange.Net.UnitTests
             // arrange
             var topicId = "ExchangeCaseInsensitive";
             var symbols = CreateTestSymbols();
-            ExchangeSymbolCache.UpdateSymbolInfo(topicId, symbols);
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Env", null, symbols);
 
             // act
-            var result = ExchangeSymbolCache.GetSymbolsForBaseAsset(topicId, "btc");
+            var result = ExchangeSymbolCache.GetSymbolsForBaseAsset(topicId, "Env", null, "btc");
 
             // assert
             Assert.That(result, Is.Not.Null);
@@ -289,10 +289,10 @@ namespace CryptoExchange.Net.UnitTests
             // arrange
             var topicId = "ExchangeNoBaseAsset";
             var symbols = CreateTestSymbols();
-            ExchangeSymbolCache.UpdateSymbolInfo(topicId, symbols);
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Env", null, symbols);
 
             // act
-            var result = ExchangeSymbolCache.GetSymbolsForBaseAsset(topicId, "LINK");
+            var result = ExchangeSymbolCache.GetSymbolsForBaseAsset(topicId, "Env", null, "LINK");
 
             // assert
             Assert.That(result, Is.Not.Null);
@@ -306,7 +306,7 @@ namespace CryptoExchange.Net.UnitTests
             var nonExistentTopic = "NonExistent_" + Guid.NewGuid();
 
             // act
-            var result = ExchangeSymbolCache.GetSymbolsForBaseAsset(nonExistentTopic, "BTC");
+            var result = ExchangeSymbolCache.GetSymbolsForBaseAsset(nonExistentTopic, "Env", null, "BTC");
 
             // assert
             Assert.That(result, Is.Not.Null);
@@ -319,10 +319,10 @@ namespace CryptoExchange.Net.UnitTests
             // arrange
             var topicId = "ExchangeParse";
             var symbols = CreateTestSymbols();
-            ExchangeSymbolCache.UpdateSymbolInfo(topicId, symbols);
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Env", null, symbols);
 
             // act
-            var result = ExchangeSymbolCache.ParseSymbol(topicId, "BTCUSDT");
+            var result = ExchangeSymbolCache.ParseSymbol(topicId, "Env", null, "BTCUSDT");
 
             // assert
             Assert.That(result, Is.Not.Null);
@@ -338,10 +338,10 @@ namespace CryptoExchange.Net.UnitTests
             // arrange
             var topicId = "ExchangeNoParse";
             var symbols = CreateTestSymbols();
-            ExchangeSymbolCache.UpdateSymbolInfo(topicId, symbols);
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Env", null, symbols);
 
             // act
-            var result = ExchangeSymbolCache.ParseSymbol(topicId, "LINKUSDT");
+            var result = ExchangeSymbolCache.ParseSymbol(topicId, "Env", null, "LINKUSDT");
 
             // assert
             Assert.That(result, Is.Null);
@@ -353,10 +353,10 @@ namespace CryptoExchange.Net.UnitTests
             // arrange
             var topicId = "ExchangeNullSymbol";
             var symbols = CreateTestSymbols();
-            ExchangeSymbolCache.UpdateSymbolInfo(topicId, symbols);
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Env", null, symbols);
 
             // act
-            var result = ExchangeSymbolCache.ParseSymbol(topicId, null);
+            var result = ExchangeSymbolCache.ParseSymbol(topicId, "Env", null, null);
 
             // assert
             Assert.That(result, Is.Null);
@@ -369,7 +369,7 @@ namespace CryptoExchange.Net.UnitTests
             var nonExistentTopic = "NonExistent_" + Guid.NewGuid();
 
             // act
-            var result = ExchangeSymbolCache.ParseSymbol(nonExistentTopic, "BTCUSDT");
+            var result = ExchangeSymbolCache.ParseSymbol(nonExistentTopic, "Env", null, "BTCUSDT");
 
             // assert
             Assert.That(result, Is.Null);
@@ -391,14 +391,14 @@ namespace CryptoExchange.Net.UnitTests
             };
 
             // act
-            ExchangeSymbolCache.UpdateSymbolInfo(topic1, symbols1);
-            ExchangeSymbolCache.UpdateSymbolInfo(topic2, symbols2);
+            ExchangeSymbolCache.UpdateSymbolInfo(topic1, "Env", null, symbols1);
+            ExchangeSymbolCache.UpdateSymbolInfo(topic2, "Env", null, symbols2);
 
             // assert
-            Assert.That(ExchangeSymbolCache.SupportsSymbol(topic1, "BTCUSDT"), Is.True);
-            Assert.That(ExchangeSymbolCache.SupportsSymbol(topic1, "ETHUSDT"), Is.False);
-            Assert.That(ExchangeSymbolCache.SupportsSymbol(topic2, "ETHUSDT"), Is.True);
-            Assert.That(ExchangeSymbolCache.SupportsSymbol(topic2, "BTCUSDT"), Is.False);
+            Assert.That(ExchangeSymbolCache.SupportsSymbol(topic1, "Env", null, "BTCUSDT"), Is.True);
+            Assert.That(ExchangeSymbolCache.SupportsSymbol(topic1, "Env", null, "ETHUSDT"), Is.False);
+            Assert.That(ExchangeSymbolCache.SupportsSymbol(topic2, "Env", null, "ETHUSDT"), Is.True);
+            Assert.That(ExchangeSymbolCache.SupportsSymbol(topic2, "Env", null, "BTCUSDT"), Is.False);
         }
 
         [Test]
@@ -411,14 +411,14 @@ namespace CryptoExchange.Net.UnitTests
             var allSymbols = spotSymbols.Concat(futuresSymbols).ToArray();
 
             // act
-            ExchangeSymbolCache.UpdateSymbolInfo(topicId, allSymbols);
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Env", null, allSymbols);
 
             // assert
             var spotSymbol = new SharedSymbol(TradingMode.Spot, "BTC", "USDT");
             var futuresSymbol = new SharedSymbol(TradingMode.PerpetualLinear, "BTC", "USDT");
 
-            Assert.That(ExchangeSymbolCache.SupportsSymbol(topicId, spotSymbol), Is.True);
-            Assert.That(ExchangeSymbolCache.SupportsSymbol(topicId, futuresSymbol), Is.True);
+            Assert.That(ExchangeSymbolCache.SupportsSymbol(topicId, "Env", null, spotSymbol), Is.True);
+            Assert.That(ExchangeSymbolCache.SupportsSymbol(topicId, "Env", null, futuresSymbol), Is.True);
         }
 
         [Test]
@@ -429,10 +429,10 @@ namespace CryptoExchange.Net.UnitTests
             var spotSymbols = CreateTestSymbols();
             var futuresSymbols = CreateFuturesSymbols();
             var allSymbols = spotSymbols.Concat(futuresSymbols).ToArray();
-            ExchangeSymbolCache.UpdateSymbolInfo(topicId, allSymbols);
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Env", null, allSymbols);
 
             // act
-            var result = ExchangeSymbolCache.GetSymbolsForBaseAsset(topicId, "BTC");
+            var result = ExchangeSymbolCache.GetSymbolsForBaseAsset(topicId, "Env", null, "BTC");
 
             // assert
             Assert.That(result.Length, Is.GreaterThanOrEqualTo(2));
@@ -451,15 +451,119 @@ namespace CryptoExchange.Net.UnitTests
                 new SharedSpotSymbol("ETH", "BTC", "ETHBTC", true, TradingMode.Spot),
                 new SharedSpotSymbol("ETH", "EUR", "ETHEUR", true, TradingMode.Spot)
             };
-            ExchangeSymbolCache.UpdateSymbolInfo(topicId, symbols);
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Env", null, symbols);
 
             // act
-            var result = ExchangeSymbolCache.GetSymbolsForBaseAsset(topicId, "ETH");
+            var result = ExchangeSymbolCache.GetSymbolsForBaseAsset(topicId, "Env", null, "ETH");
 
             // assert
             Assert.That(result.Length, Is.EqualTo(3));
             Assert.That(result.All(x => x.BaseAsset == "ETH"), Is.True);
         }
 
+        [Test]
+        public void GetSymbolsForBaseAsset_WithDifferentEnvironments_Should_ReturnNone()
+        {
+            // arrange
+            var topicId = "Topic1";
+            var spotSymbols = CreateTestSymbols();
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Live", null, spotSymbols);
+
+            // act
+            var result = ExchangeSymbolCache.GetSymbolsForBaseAsset(topicId, "Test", null, "BTC");
+
+            // assert
+            Assert.That(result.Length, Is.EqualTo(0));
+        }
+
+        [Test]
+        public void GetSymbolsForBaseAsset_WithDifferentKey_Should_ReturnNone()
+        {
+            // arrange
+            var topicId = "Topic2";
+            var spotSymbols = CreateTestSymbols();
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Live", "1", spotSymbols);
+
+            // act
+            var result = ExchangeSymbolCache.GetSymbolsForBaseAsset(topicId, "Live", "2", "BTC");
+
+            // assert
+            Assert.That(result.Length, Is.EqualTo(0));
+        }
+
+        [Test]
+        public void GetSymbolsForBaseAsset_WithSetKey_Should_ReturnNone()
+        {
+            // arrange
+            var topicId = "Topic3";
+            var spotSymbols = CreateTestSymbols();
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Live", null, spotSymbols);
+
+            // act
+            var result = ExchangeSymbolCache.GetSymbolsForBaseAsset(topicId, "Live", "2", "BTC");
+
+            // assert
+            Assert.That(result.Length, Is.EqualTo(0));
+        }
+
+        [Test]
+        public void GetSymbolsForBaseAsset_WithNotSetKey_Should_ReturnNone()
+        {
+            // arrange
+            var topicId = "Topic4";
+            var spotSymbols = CreateTestSymbols();
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Live", "2", spotSymbols);
+
+            // act
+            var result = ExchangeSymbolCache.GetSymbolsForBaseAsset(topicId, "Live", null, "BTC");
+
+            // assert
+            Assert.That(result.Length, Is.EqualTo(2));
+        }
+
+        [Test]
+        public void ParseSymbol_WithDifferentKey_Should_ReturnNull()
+        {
+            // arrange
+            var topicId = "Topic5";
+            var spotSymbols = CreateTestSymbols();
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Live", "1", spotSymbols);
+
+            // act
+            var result = ExchangeSymbolCache.ParseSymbol(topicId, "Live", "2", "BTCUSDT");
+
+            // assert
+            Assert.That(result, Is.Null);
+        }
+
+        [Test]
+        public void ParseSymbol_WithSetKey_Should_ReturnNull()
+        {
+            // arrange
+            var topicId = "Topic6";
+            var spotSymbols = CreateTestSymbols();
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Live", null, spotSymbols);
+
+            // act
+            var result = ExchangeSymbolCache.ParseSymbol(topicId, "Live", "2", "BTCUSDT");
+
+            // assert
+            Assert.That(result, Is.Null);
+        }
+
+        [Test]
+        public void ParseSymbol_WithNotSetKey_Should_ReturnNull()
+        {
+            // arrange
+            var topicId = "Topic7";
+            var spotSymbols = CreateTestSymbols();
+            ExchangeSymbolCache.UpdateSymbolInfo(topicId, "Live", "1", spotSymbols);
+
+            // act
+            var result = ExchangeSymbolCache.ParseSymbol(topicId, "Live", null, "BTCUSDT");
+
+            // assert
+            Assert.That(result, Is.Not.Null);
+        }
     }
 }

CryptoExchange.Net.UnitTests/Implementations/TestQuery.cs

@@ -11,15 +11,15 @@ namespace CryptoExchange.Net.UnitTests.Implementations
     {
         public TestQuery(TestSocketMessage request, bool authenticated) : base(request, authenticated, 1)
         {
-            MessageRouter = MessageRouter.CreateWithoutTopicFilter<TestSocketMessage>(request.Id.ToString(), HandleMessage);
+            MessageRouter = MessageRouter.CreateForQuery<TestSocketMessage>(request.Id.ToString(), HandleMessage);
         }
 
-        private CallResult? HandleMessage(SocketConnection connection, DateTime time, string? arg3, TestSocketMessage message)
+        private CallResult<TestSocketMessage>? HandleMessage(SocketConnection connection, DateTime time, string? arg3, TestSocketMessage message)
         {
             if (message.Data != "OK")
-                return new CallResult(new ServerError(ErrorInfo.Unknown with { Message = message.Data }));
+                return CallResult.Fail<TestSocketMessage>(new ServerError(ErrorInfo.Unknown with { Message = message.Data }));
 
-            return CallResult.SuccessResult;
+            return CallResult.Ok(message);
         }
     }
 }

CryptoExchange.Net.UnitTests/Implementations/TestRestApiClient.cs

@@ -3,6 +3,7 @@ using CryptoExchange.Net.Converters.MessageParsing.DynamicConverters;
 using CryptoExchange.Net.Converters.SystemTextJson;
 using CryptoExchange.Net.Interfaces;
 using CryptoExchange.Net.Objects;
+using CryptoExchange.Net.RateLimiting;
 using CryptoExchange.Net.SharedApis;
 using CryptoExchange.Net.Testing.Implementations;
 using Microsoft.Extensions.Logging;
@@ -19,8 +20,8 @@ namespace CryptoExchange.Net.UnitTests.Implementations
     {
         protected override IRestMessageHandler MessageHandler { get; } = new TestRestMessageHandler();
 
-        public TestRestApiClient(ILogger logger, HttpClient? httpClient, TestRestOptions options) 
-            : base(logger, httpClient, options.Environment.RestClientAddress, options, options.ExchangeOptions)
+        public TestRestApiClient(ILoggerFactory? loggerFactory, HttpClient? httpClient, TestRestOptions options) 
+            : base(loggerFactory, "Test", httpClient, options.Environment.RestClientAddress, options, options.ExchangeOptions)
         {
         }
 
@@ -47,13 +48,14 @@ namespace CryptoExchange.Net.UnitTests.Implementations
             RequestFactory = factory;
         }
 
-        internal async Task<WebCallResult<T>> GetResponseAsync<T>(HttpMethod? httpMethod = null, ParameterCollection? collection = null)
+        internal async Task<HttpResult<T>> GetResponseAsync<T>(HttpMethod? httpMethod = null, Parameters? collection = null, RateLimitGate? rateLimitGate = null)
         {
-            var definition = new RequestDefinition("/path", httpMethod ?? HttpMethod.Get)
+            var definition = new RequestDefinition(BaseAddress, "/path", httpMethod ?? HttpMethod.Get)
             {
-                Weight = 0
+                Weight = rateLimitGate == null ? 0 : 1,
+                RateLimitGate = rateLimitGate
             };
-            return await SendAsync<T>(BaseAddress, definition, collection ?? new ParameterCollection(), default);
+            return await SendAsync<T>(definition, collection ?? new Parameters(new ParameterSerializationSettings()), default);
         }
 
         internal void SetParameterPosition(HttpMethod httpMethod, HttpMethodParameterPosition pos)

CryptoExchange.Net.UnitTests/Implementations/TestRestClient.cs

@@ -20,8 +20,8 @@ namespace CryptoExchange.Net.UnitTests.Implementations
         {
             Initialize(options.Value);
 
-            ApiClient1 = AddApiClient(new TestRestApiClient(_logger, httpClient, options.Value));
-            ApiClient2 = AddApiClient(new TestRestApiClient(_logger, httpClient, options.Value));
+            ApiClient1 = AddApiClient(new TestRestApiClient(loggerFactory, httpClient, options.Value));
+            ApiClient2 = AddApiClient(new TestRestApiClient(loggerFactory, httpClient, options.Value));
         }
     }
 }

CryptoExchange.Net.UnitTests/Implementations/TestSerializerContext.cs

@@ -1,4 +1,5 @@
-using CryptoExchange.Net.UnitTests.ConverterTests;
+using CryptoExchange.Net.Objects;
+using CryptoExchange.Net.UnitTests.ConverterTests;
 using CryptoExchange.Net.UnitTests.Implementations;
 using System.Collections.Generic;
 using System.Text.Json.Serialization;
@@ -11,6 +12,7 @@ namespace CryptoExchange.Net.UnitTests
     [JsonSerializable(typeof(IDictionary<string, string>))]
     [JsonSerializable(typeof(Dictionary<string, object>))]
     [JsonSerializable(typeof(IDictionary<string, object>))]
+    [JsonSerializable(typeof(Parameters))]
     [JsonSerializable(typeof(TestObject))]
 
     [JsonSerializable(typeof(TestSocketMessage))]

CryptoExchange.Net.UnitTests/Implementations/TestSocketApiClient.cs

@@ -17,13 +17,13 @@ namespace CryptoExchange.Net.UnitTests.Implementations
 {
     internal class TestSocketApiClient : SocketApiClient<TestEnvironment, TestAuthenticationProvider, TestCredentials>
     {
-        public TestSocketApiClient(ILogger logger, TestSocketOptions options)
-            : base(logger, options.Environment.SocketClientAddress, options, options.ExchangeOptions)
+        public TestSocketApiClient(ILoggerFactory? loggerFactory, TestSocketOptions options)
+            : base(loggerFactory, "Test", options.Environment.SocketClientAddress, options, options.ExchangeOptions)
         {
         }
 
-        public TestSocketApiClient(ILogger logger, HttpClient httpClient, string baseAddress, TestSocketOptions options, SocketApiOptions apiOptions)
-            : base(logger, baseAddress, options, apiOptions)
+        public TestSocketApiClient(ILoggerFactory? loggerFactory, HttpClient httpClient, string baseAddress, TestSocketOptions options, SocketApiOptions apiOptions)
+            : base(loggerFactory, "Test", baseAddress, options, apiOptions)
         {
         }
 
@@ -36,9 +36,13 @@ namespace CryptoExchange.Net.UnitTests.Implementations
         protected override TestAuthenticationProvider CreateAuthenticationProvider(TestCredentials credentials) =>
             new TestAuthenticationProvider(credentials);
 
-        public async Task<CallResult<UpdateSubscription>> SubscribeToUpdatesAsync<T>(Action<DataEvent<T>> handler, bool subQuery, CancellationToken ct)
+        public async Task<WebSocketResult<UpdateSubscription>> SubscribeToUpdatesAsync<T>(Action<DataEvent<T>> handler, bool subQuery, CancellationToken ct, int individualSubscriptionCount = 1)
         {
-            return await base.SubscribeAsync(new TestSubscription<T>(_logger, handler, subQuery, false), ct);
+            var subscription = new TestSubscription<T>(_logger, handler, subQuery, false)
+            {
+                IndividualSubscriptionCount = individualSubscriptionCount
+            };
+            return await base.SubscribeAsync(subscription, ct);
         }
     }
 }

CryptoExchange.Net.UnitTests/Implementations/TestSocketClient.cs

@@ -19,8 +19,8 @@ namespace CryptoExchange.Net.UnitTests.Implementations
         {
             Initialize(options.Value);
 
-            ApiClient1 = AddApiClient(new TestSocketApiClient(_logger, options.Value));
-            ApiClient2 = AddApiClient(new TestSocketApiClient(_logger, options.Value));
+            ApiClient1 = AddApiClient(new TestSocketApiClient(loggerFactory, options.Value));
+            ApiClient2 = AddApiClient(new TestSocketApiClient(loggerFactory, options.Value));
         }
     }
 }

CryptoExchange.Net.UnitTests/Implementations/TestSubscription.cs

@@ -21,7 +21,7 @@ namespace CryptoExchange.Net.UnitTests.Implementations
             _handler = handler;
             _subQuery = subQuery;
 
-            MessageRouter = MessageRouter.CreateWithoutTopicFilter<T>("test", HandleUpdate);
+            MessageRouter = MessageRouter.CreateForEvent<T>("test", HandleUpdate);
         }
 
         protected override Query? GetSubQuery(SocketConnection connection)
@@ -44,7 +44,7 @@ namespace CryptoExchange.Net.UnitTests.Implementations
         private CallResult? HandleUpdate(SocketConnection connection, DateTime time, string? originalData, T data)
         {
             _handler(new DataEvent<T>("Test", data, time, originalData));
-            return CallResult.SuccessResult;
+            return CallResult.Ok();
         }
     }
 }

CryptoExchange.Net.UnitTests/ManualUpdateSubscriptionTests.cs

@@ -0,0 +1,136 @@
+using CryptoExchange.Net.Objects;
+using CryptoExchange.Net.Objects.Errors;
+using CryptoExchange.Net.Objects.Sockets;
+using CryptoExchange.Net.Sockets.Default;
+using NUnit.Framework;
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace CryptoExchange.Net.UnitTests
+{
+    [TestFixture]
+    public class ManualUpdateSubscriptionTests
+    {
+        [Test]
+        public void Constructor_Should_CreateSubscribedVirtualSubscription()
+        {
+            var controller = new ManualUpdateSubscription(socketId: 12);
+
+            Assert.That(controller.Subscription.SocketId, Is.EqualTo(12));
+            Assert.That(controller.Subscription.Id, Is.GreaterThan(0));
+            Assert.That(controller.Subscription.SocketStatus, Is.EqualTo(SocketStatus.Connected));
+            Assert.That(controller.Subscription.SubscriptionStatus, Is.EqualTo(SubscriptionStatus.Subscribed));
+            Assert.That(controller.Subscription.LastReceiveTime, Is.Null);
+        }
+
+        [Test]
+        public void StateChanges_Should_BeVisibleOnSubscription()
+        {
+            var controller = new ManualUpdateSubscription();
+            var timestamp = new DateTime(2026, 8, 5, 12, 0, 0, DateTimeKind.Utc);
+            var statuses = new List<SubscriptionStatus>();
+            controller.Subscription.SubscriptionStatusChanged += statuses.Add;
+
+            controller.SetLastReceiveTime(timestamp);
+            controller.SetSocketStatus(SocketStatus.Reconnecting);
+            controller.SetSubscriptionStatus(SubscriptionStatus.Subscribing);
+            controller.SetSubscriptionStatus(SubscriptionStatus.Subscribed);
+
+            Assert.That(controller.Subscription.LastReceiveTime, Is.EqualTo(timestamp));
+            Assert.That(controller.Subscription.SocketStatus, Is.EqualTo(SocketStatus.Reconnecting));
+            Assert.That(controller.Subscription.SubscriptionStatus, Is.EqualTo(SubscriptionStatus.Subscribed));
+            Assert.That(statuses, Is.EqualTo(new[]
+            {
+                SubscriptionStatus.Subscribing,
+                SubscriptionStatus.Subscribed
+            }));
+        }
+
+        [Test]
+        public void LifecycleMethods_Should_InvokeSubscriptionEvents()
+        {
+            var controller = new ManualUpdateSubscription();
+            var error = new ServerError("Test error", ErrorInfo.Unknown);
+            var exception = new InvalidOperationException("Test exception");
+            var disconnectedPeriod = TimeSpan.FromMinutes(2);
+            var lost = 0;
+            var restored = TimeSpan.Zero;
+            Error? resubscribeError = null;
+            var paused = 0;
+            var unpaused = 0;
+            Exception? receivedException = null;
+
+            controller.Subscription.ConnectionLost += () => lost++;
+            controller.Subscription.ConnectionRestored += x => restored = x;
+            controller.Subscription.ResubscribingFailed += x => resubscribeError = x;
+            controller.Subscription.ActivityPaused += () => paused++;
+            controller.Subscription.ActivityUnpaused += () => unpaused++;
+            controller.Subscription.Exception += x => receivedException = x;
+
+            controller.InvokeConnectionLost();
+            controller.InvokeConnectionRestored(disconnectedPeriod);
+            controller.InvokeResubscribingFailed(error);
+            controller.InvokeActivityPaused();
+            controller.InvokeActivityUnpaused();
+            controller.InvokeException(exception);
+
+            Assert.That(lost, Is.EqualTo(1));
+            Assert.That(restored, Is.EqualTo(disconnectedPeriod));
+            Assert.That(resubscribeError, Is.SameAs(error));
+            Assert.That(paused, Is.EqualTo(1));
+            Assert.That(unpaused, Is.EqualTo(1));
+            Assert.That(receivedException, Is.SameAs(exception));
+        }
+
+        [Test]
+        public void InvokeConnectionClosed_Should_CloseAndOnlyInvokeOnce()
+        {
+            var controller = new ManualUpdateSubscription();
+            var closed = 0;
+            controller.Subscription.ConnectionClosed += () => closed++;
+
+            controller.InvokeConnectionClosed();
+            controller.InvokeConnectionClosed();
+
+            Assert.That(closed, Is.EqualTo(1));
+            Assert.That(controller.Subscription.SocketStatus, Is.EqualTo(SocketStatus.Closed));
+            Assert.That(controller.Subscription.SubscriptionStatus, Is.EqualTo(SubscriptionStatus.Closed));
+        }
+
+        [Test]
+        public async Task SubscriptionOperations_Should_InvokeCallbacks()
+        {
+            var closes = 0;
+            var reconnects = 0;
+            var resubscribes = 0;
+            var controller = new ManualUpdateSubscription(
+                closeAsync: () =>
+                {
+                    closes++;
+                    return Task.CompletedTask;
+                },
+                reconnectAsync: () =>
+                {
+                    reconnects++;
+                    return Task.CompletedTask;
+                },
+                resubscribeAsync: () =>
+                {
+                    resubscribes++;
+                    return Task.FromResult(CallResult.Ok());
+                });
+
+            await controller.Subscription.ReconnectAsync();
+            var resubscribeResult = await controller.Subscription.ResubscribeAsync();
+            await controller.Subscription.CloseAsync();
+            await controller.Subscription.CloseAsync();
+
+            Assert.That(reconnects, Is.EqualTo(1));
+            Assert.That(resubscribes, Is.EqualTo(1));
+            Assert.That(resubscribeResult.Success, Is.True);
+            Assert.That(closes, Is.EqualTo(1));
+            Assert.That(controller.Subscription.SubscriptionStatus, Is.EqualTo(SubscriptionStatus.Closed));
+        }
+    }
+}

CryptoExchange.Net.UnitTests/ParameterCollectionTests.cs

@@ -12,319 +12,248 @@ namespace CryptoExchange.Net.UnitTests
         [Test]
         public void AddingBasicValue_SetValueCorrectly()
         {
-            var parameters = new ParameterCollection();
+            var parameters = new Parameters(new ParameterSerializationSettings());
             parameters.Add("test", "value");
             Assert.That(parameters["test"], Is.EqualTo("value"));
         }
 
-        [Test]
-        public void AddingBasicNullValue_ThrowsException()
-        {
-            var parameters = new ParameterCollection();
-            Assert.Throws<ArgumentNullException>(() =>  parameters.Add("test", null!));
-        }
-
-        [Test]
-        public void AddingOptionalBasicValue_SetValueCorrectly()
-        {
-            var parameters = new ParameterCollection();
-            parameters.AddOptional("test", "value");
-            Assert.That(parameters["test"], Is.EqualTo("value"));
-        }
-
         [Test]
         public void AddingOptionalBasicNullValue_DoesntSetValue()
         {
-            var parameters = new ParameterCollection();
-            parameters.AddOptional("test", null);
+            var parameters = new Parameters(new ParameterSerializationSettings());
+            parameters.Add("test", null);
             Assert.That(parameters.ContainsKey("test"), Is.False);
         }
 
         [Test]
         public void AddingDecimalValueAsString_SetValueCorrectly()
         {
-            var parameters = new ParameterCollection();
-            parameters.AddString("test", 0.1m);
+            var parameters = new Parameters(new ParameterSerializationSettings());
+            parameters.Add("test", 0.1m, DecimalSerialization.String);
             Assert.That(parameters["test"], Is.EqualTo("0.1"));
         }
 
         [Test]
-        public void AddingOptionalDecimalValueAsString_SetValueCorrectly()
+        public void AddingDecimalValueAsString2_SetValueCorrectly()
         {
-            var parameters = new ParameterCollection();
-            parameters.AddOptionalString("test", 0.1m);
+            var parameters = new Parameters(new ParameterSerializationSettings()
+            {
+                Decimal = DecimalSerialization.String
+            });
+            parameters.Add("test", 0.1m);
             Assert.That(parameters["test"], Is.EqualTo("0.1"));
         }
 
-        [Test]
-        public void AddingOptionalDecimalNullValueAsString_DoesntSetValue()
-        {
-            var parameters = new ParameterCollection();
-            parameters.AddOptionalString("test", (decimal?)null);
-            Assert.That(parameters.ContainsKey("test"), Is.False);
-        }
-
-        [Test]
-        public void AddingIntValueAsString_SetValueCorrectly()
-        {
-            var parameters = new ParameterCollection();
-            parameters.AddString("test", 1);
-            Assert.That(parameters["test"], Is.EqualTo("1"));
-        }
-
-        [Test]
-        public void AddingOptionalIntValueAsString_SetValueCorrectly()
-        {
-            var parameters = new ParameterCollection();
-            parameters.AddOptionalString("test", 1);
-            Assert.That(parameters["test"], Is.EqualTo("1"));
-        }
-
         [Test]
         public void AddingOptionalIntNullValueAsString_DoesntSetValue()
         {
-            var parameters = new ParameterCollection();
-            parameters.AddOptionalString("test", (int?)null);
+            var parameters = new Parameters(new ParameterSerializationSettings());
+            parameters.Add("test", (int?)null);
             Assert.That(parameters.ContainsKey("test"), Is.False);
         }
 
         [Test]
         public void AddingLongValueAsString_SetValueCorrectly()
         {
-            var parameters = new ParameterCollection();
-            parameters.AddString("test", 1L);
+            var parameters = new Parameters(new ParameterSerializationSettings());
+            parameters.Add("test", 1L, IntegerSerialization.String);
             Assert.That(parameters["test"], Is.EqualTo("1"));
         }
 
         [Test]
         public void AddingOptionalLongValueAsString_SetValueCorrectly()
         {
-            var parameters = new ParameterCollection();
-            parameters.AddOptionalString("test", 1L);
+            var parameters = new Parameters(new ParameterSerializationSettings()
+            {
+                Integer = IntegerSerialization.String
+            });
+            parameters.Add("test", 1L);
             Assert.That(parameters["test"], Is.EqualTo("1"));
         }
 
         [Test]
         public void AddingOptionalLongNullValueAsString_DoesntSetValue()
         {
-            var parameters = new ParameterCollection();
-            parameters.AddOptionalString("test", (long?)null);
+            var parameters = new Parameters(new ParameterSerializationSettings());
+            parameters.Add("test", (long?)null);
             Assert.That(parameters.ContainsKey("test"), Is.False);
         }
 
         [Test]
         public void AddingMillisecondTimestamp_SetValueCorrectly()
         {
-            var parameters = new ParameterCollection();
-            parameters.AddMilliseconds("test", new DateTime(2025, 1, 1, 0, 0, 0, DateTimeKind.Utc));
+            var parameters = new Parameters(new ParameterSerializationSettings());
+            parameters.Add("test", new DateTime(2025, 1, 1, 0, 0, 0, DateTimeKind.Utc), DateTimeSerialization.MillisecondsNumber);
             Assert.That(parameters["test"], Is.EqualTo(1735689600000));
         }
 
         [Test]
         public void AddingOptionalMillisecondTimestamp_SetValueCorrectly()
         {
-            var parameters = new ParameterCollection();
-            parameters.AddOptionalMilliseconds("test", new DateTime(2025, 1, 1, 0, 0, 0, DateTimeKind.Utc));
+            var parameters = new Parameters(new ParameterSerializationSettings()
+            {
+                DateTimes = DateTimeSerialization.MillisecondsNumber
+            });
+            parameters.Add("test", new DateTime(2025, 1, 1, 0, 0, 0, DateTimeKind.Utc));
             Assert.That(parameters["test"], Is.EqualTo(1735689600000));
         }
 
         [Test]
         public void AddingOptionalMillisecondNullValue_DoesntSetValue()
         {
-            var parameters = new ParameterCollection();
-            parameters.AddOptionalMilliseconds("test", null);
+            var parameters = new Parameters(new ParameterSerializationSettings());
+            parameters.Add("test", (DateTime?)null);
             Assert.That(parameters.ContainsKey("test"), Is.False);
         }
 
         [Test]
         public void AddingMillisecondTimestampString_SetValueCorrectly()
         {
-            var parameters = new ParameterCollection();
-            parameters.AddMillisecondsString("test", new DateTime(2025, 1, 1, 0, 0, 0, DateTimeKind.Utc));
+            var parameters = new Parameters(new ParameterSerializationSettings());
+            parameters.Add("test", new DateTime(2025, 1, 1, 0, 0, 0, DateTimeKind.Utc), DateTimeSerialization.MillisecondsString);
             Assert.That(parameters["test"], Is.EqualTo("1735689600000"));
         }
 
         [Test]
         public void AddingOptionalMillisecondTimestampString_SetValueCorrectly()
         {
-            var parameters = new ParameterCollection();
-            parameters.AddOptionalMillisecondsString("test", new DateTime(2025, 1, 1, 0, 0, 0, DateTimeKind.Utc));
+            var parameters = new Parameters(new ParameterSerializationSettings()
+            {
+                DateTimes = DateTimeSerialization.MillisecondsString
+            });
+            parameters.Add("test", new DateTime(2025, 1, 1, 0, 0, 0, DateTimeKind.Utc));
             Assert.That(parameters["test"], Is.EqualTo("1735689600000"));
         }
 
-        [Test]
-        public void AddingOptionalMillisecondStringNullValue_DoesntSetValue()
-        {
-            var parameters = new ParameterCollection();
-            parameters.AddOptionalMillisecondsString("test", null);
-            Assert.That(parameters.ContainsKey("test"), Is.False);
-        }
-
         [Test]
         public void AddingSecondTimestamp_SetValueCorrectly()
         {
-            var parameters = new ParameterCollection();
-            parameters.AddSeconds("test", new DateTime(2025, 1, 1, 0, 0, 0, DateTimeKind.Utc));
+            var parameters = new Parameters(new ParameterSerializationSettings());
+            parameters.Add("test", new DateTime(2025, 1, 1, 0, 0, 0, DateTimeKind.Utc), DateTimeSerialization.SecondsNumber);
             Assert.That(parameters["test"], Is.EqualTo(1735689600));
         }
 
         [Test]
         public void AddingOptionalSecondTimestamp_SetValueCorrectly()
         {
-            var parameters = new ParameterCollection();
-            parameters.AddOptionalSeconds("test", new DateTime(2025, 1, 1, 0, 0, 0, DateTimeKind.Utc));
+            var parameters = new Parameters(new ParameterSerializationSettings()
+            {
+                DateTimes = DateTimeSerialization.SecondsNumber
+            });
+            parameters.Add("test", new DateTime(2025, 1, 1, 0, 0, 0, DateTimeKind.Utc));
             Assert.That(parameters["test"], Is.EqualTo(1735689600));
         }
 
-        [Test]
-        public void AddingSecondNullValue_DoesntSetValue()
-        {
-            var parameters = new ParameterCollection();
-            parameters.AddOptionalSeconds("test", null);
-            Assert.That(parameters.ContainsKey("test"), Is.False);
-        }
-
         [Test]
         public void AddingSecondTimestampString_SetValueCorrectly()
         {
-            var parameters = new ParameterCollection();
-            parameters.AddSecondsString("test", new DateTime(2025, 1, 1, 0, 0, 0, DateTimeKind.Utc));
+            var parameters = new Parameters(new ParameterSerializationSettings());
+            parameters.Add("test", new DateTime(2025, 1, 1, 0, 0, 0, DateTimeKind.Utc), DateTimeSerialization.SecondsString);
             Assert.That(parameters["test"], Is.EqualTo("1735689600"));
         }
 
         [Test]
         public void AddingOptionalSecondTimestampString_SetValueCorrectly()
         {
-            var parameters = new ParameterCollection();
-            parameters.AddOptionalSecondsString("test", new DateTime(2025, 1, 1, 0, 0, 0, DateTimeKind.Utc));
+            var parameters = new Parameters(new ParameterSerializationSettings()
+            {
+                DateTimes = DateTimeSerialization.SecondsString
+            });
+            parameters.Add("test", new DateTime(2025, 1, 1, 0, 0, 0, DateTimeKind.Utc));
             Assert.That(parameters["test"], Is.EqualTo("1735689600"));
         }
 
-        [Test]
-        public void AddingSecondStringNullValue_DoesntSetValue()
-        {
-            var parameters = new ParameterCollection();
-            parameters.AddOptionalSecondsString("test", null);
-            Assert.That(parameters.ContainsKey("test"), Is.False);
-        }
-
         [Test]
         public void AddingEnum_SetValueCorrectly()
         {
-            var parameters = new ParameterCollection();
-            parameters.AddEnum("test", TestEnum.Two);
+            var parameters = new Parameters(new ParameterSerializationSettings());
+            parameters.Add("test", TestEnum.Two);
             Assert.That(parameters["test"], Is.EqualTo("2"));
         }
 
         [Test]
         public void AddingOptionalEnum_SetValueCorrectly()
         {
-            var parameters = new ParameterCollection();
-            parameters.AddOptionalEnum("test", (TestEnum?)TestEnum.Two);
+            var parameters = new Parameters(new ParameterSerializationSettings());
+            parameters.Add("test", (TestEnum?)TestEnum.Two);
             Assert.That(parameters["test"], Is.EqualTo("2"));
         }
 
         [Test]
         public void AddingOptionalEnumNullValue_DoesntSetValue()
         {
-            var parameters = new ParameterCollection();
-            parameters.AddOptionalEnum("test", (TestEnum?)null);
+            var parameters = new Parameters(new ParameterSerializationSettings());
+            parameters.Add("test", (TestEnum?)null);
             Assert.That(parameters.ContainsKey("test"), Is.False);
         }
 
         [Test]
         public void AddingEnumAsInt_SetValueCorrectly()
         {
-            var parameters = new ParameterCollection();
-            parameters.AddEnumAsInt("test", TestEnum.Two);
+            var parameters = new Parameters(new ParameterSerializationSettings());
+            parameters.Add("test", TestEnum.Two, EnumSerialization.Number);
             Assert.That(parameters["test"], Is.EqualTo(2));
         }
 
         [Test]
         public void AddingOptionalEnumAsInt_SetValueCorrectly()
         {
-            var parameters = new ParameterCollection();
-            parameters.AddOptionalEnumAsInt("test", (TestEnum?)TestEnum.Two);
+            var parameters = new Parameters(new ParameterSerializationSettings()
+            {
+                Enum = EnumSerialization.Number
+            });
+            parameters.Add("test", TestEnum.Two);
             Assert.That(parameters["test"], Is.EqualTo(2));
         }
 
-        [Test]
-        public void AddingOptionalEnumAsIntNullValue_DoesntSetValue()
-        {
-            var parameters = new ParameterCollection();
-            parameters.AddOptionalEnumAsInt("test", (TestEnum?)null);
-            Assert.That(parameters.ContainsKey("test"), Is.False);
-        }
-
         [Test]
         public void AddingCommaSeparated_SetValueCorrectly()
         {
-            var parameters = new ParameterCollection();
+            var parameters = new Parameters(new ParameterSerializationSettings());
             parameters.AddCommaSeparated("test", ["1", "2"]);
             Assert.That(parameters["test"], Is.EqualTo("1,2"));
         }
 
-        [Test]
-        public void AddingOptionalCommaSeparated_SetValueCorrectly()
-        {
-            var parameters = new ParameterCollection();
-            parameters.AddOptionalCommaSeparated("test", ["1", "2"]);
-            Assert.That(parameters["test"], Is.EqualTo("1,2"));
-        }
-
         [Test]
         public void AddingOptionalCommaSeparatedNullValue_DoesntSetValue()
         {
-            var parameters = new ParameterCollection();
-            parameters.AddOptionalCommaSeparated("test", (string[]?)null);
+            var parameters = new Parameters(new ParameterSerializationSettings());
+            parameters.AddCommaSeparated("test", (string[]?)null);
             Assert.That(parameters.ContainsKey("test"), Is.False);
         }
 
         [Test]
         public void AddingCommaSeparatedEnum_SetValueCorrectly()
         {
-            var parameters = new ParameterCollection();
+            var parameters = new Parameters(new ParameterSerializationSettings());
             parameters.AddCommaSeparated("test", [TestEnum.Two, TestEnum.One]);
             Assert.That(parameters["test"], Is.EqualTo("2,1"));
         }
 
-        [Test]
-        public void AddingOptionalCommaSeparatedEnum_SetValueCorrectly()
-        {
-            var parameters = new ParameterCollection();
-            parameters.AddOptionalCommaSeparated("test", [TestEnum.Two, TestEnum.One]);
-            Assert.That(parameters["test"], Is.EqualTo("2,1"));
-        }
-
-        [Test]
-        public void AddingOptionalCommaSeparatedEnumNullValue_DoesntSetValue()
-        {
-            var parameters = new ParameterCollection();
-            parameters.AddOptionalCommaSeparated("test", (TestEnum[]?)null);
-            Assert.That(parameters.ContainsKey("test"), Is.False);
-        }
-
         [Test]
         public void AddingBoolString_SetValueCorrectly()
         {
-            var parameters = new ParameterCollection();
-            parameters.AddBoolString("test", true);
+            var parameters = new Parameters(new ParameterSerializationSettings());
+            parameters.Add("test", true, BoolSerialization.String);
             Assert.That(parameters["test"], Is.EqualTo("true"));
         }
 
         [Test]
         public void AddingOptionalBoolString_SetValueCorrectly()
         {
-            var parameters = new ParameterCollection();
-            parameters.AddOptionalBoolString("test", true);
+            var parameters = new Parameters(new ParameterSerializationSettings()
+            {
+                Bool = BoolSerialization.String
+            });
+            parameters.Add("test", true);
             Assert.That(parameters["test"], Is.EqualTo("true"));
         }
 
         [Test]
         public void AddingOptionalBoolStringNullValue_DoesntSetValue()
         {
-            var parameters = new ParameterCollection();
-            parameters.AddOptionalBoolString("test", null);
+            var parameters = new Parameters(new ParameterSerializationSettings());
+            parameters.Add("test", null);
             Assert.That(parameters.ContainsKey("test"), Is.False);
         }
     }

CryptoExchange.Net.UnitTests/RateLimitTests.cs

@@ -0,0 +1,394 @@
+using CryptoExchange.Net.Objects;
+using CryptoExchange.Net.RateLimiting;
+using CryptoExchange.Net.RateLimiting.Filters;
+using CryptoExchange.Net.RateLimiting.Guards;
+using CryptoExchange.Net.RateLimiting.Interfaces;
+using CryptoExchange.Net.RateLimiting.Trackers;
+using CryptoExchange.Net.UnitTests.Implementations;
+using NUnit.Framework;
+using System;
+using System.Collections.Generic;
+using System.Net.Http;
+using System.Text;
+using System.Text.Json;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace CryptoExchange.Net.UnitTests
+{
+    [TestFixture()]
+    public class RateLimitTests
+    {
+        [TestCase(1, 0.1)]
+        [TestCase(2, 0.1)]
+        [TestCase(5, 1)]
+        [TestCase(1, 2)]
+        public async Task PartialEndpointRateLimiterBasics(int requests, double perSeconds)
+        {
+            var rateLimiter = new RateLimitGate("Test");
+            rateLimiter.AddGuard(new RateLimitGuard(RateLimitGuard.PerHost, new PathStartFilter("/sapi/"), requests, TimeSpan.FromSeconds(perSeconds), RateLimitWindowType.Fixed));
+
+            var triggered = false;
+            rateLimiter.RateLimitTriggered += (x) => { triggered = true; };
+            var requestDefinition = new RequestDefinition("https://test.com", "/sapi/v1/system/status", HttpMethod.Get);
+
+            for (var i = 0; i < requests + 1; i++)
+            {
+                var result1 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition, "123", 1, RateLimitingBehaviour.Wait, null, 1, default);
+                Assert.That(i == requests ? triggered : !triggered);
+            }
+            triggered = false;
+            await Task.Delay((int)Math.Round(perSeconds * 1000) + 10);
+            var result2 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition, "123", 1, RateLimitingBehaviour.Wait, null, 1, default);
+            Assert.That(!triggered);
+        }
+
+        [TestCase("/sapi/test1", true)]
+        [TestCase("/sapi/test2", true)]
+        [TestCase("/api/test1", false)]
+        [TestCase("sapi/test1", true)]
+        [TestCase("/sapi/", true)]
+        public async Task PartialEndpointRateLimiterEndpoints(string endpoint, bool expectLimiting)
+        {
+            var rateLimiter = new RateLimitGate("Test");
+            rateLimiter.AddGuard(new RateLimitGuard(RateLimitGuard.PerHost, new PathStartFilter("/sapi/"), 1, TimeSpan.FromSeconds(0.1), RateLimitWindowType.Fixed));
+
+            var requestDefinition = new RequestDefinition("https://test.com", endpoint, HttpMethod.Get);
+
+            RateLimitEvent? evnt = null;
+            rateLimiter.RateLimitTriggered += (x) => { evnt = x; };
+            for (var i = 0; i < 2; i++)
+            {
+                var result1 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition, "123", 1, RateLimitingBehaviour.Wait, null, 1, default);
+                bool expected = i == 1 ? expectLimiting ? evnt?.DelayTime > TimeSpan.Zero : evnt == null : evnt == null;
+                Assert.That(expected);
+            }
+        }
+
+        [TestCase("/sapi/", "/sapi/", true)]
+        [TestCase("/sapi/test", "/sapi/test", true)]
+        [TestCase("/sapi/test", "/sapi/test123", false)]
+        [TestCase("/sapi/test", "/sapi/", false)]
+        public async Task PartialEndpointRateLimiterEndpoints(string endpoint1, string endpoint2, bool expectLimiting)
+        {
+            var rateLimiter = new RateLimitGate("Test");
+            rateLimiter.AddGuard(new RateLimitGuard(RateLimitGuard.PerEndpoint, new PathStartFilter("/sapi/"), 1, TimeSpan.FromSeconds(0.1), RateLimitWindowType.Fixed));
+
+            var requestDefinition1 = new RequestDefinition("https://test.com", endpoint1, HttpMethod.Get);
+            var requestDefinition2 = new RequestDefinition("https://test.com", endpoint2, HttpMethod.Get);
+
+            RateLimitEvent? evnt = null;
+            rateLimiter.RateLimitTriggered += (x) => { evnt = x; };
+
+            var result1 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition1, "123", 1, RateLimitingBehaviour.Wait, null, 1, default);
+            Assert.That(evnt == null);
+            var result2 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition2, "123", 1, RateLimitingBehaviour.Wait, null, 1, default);
+            Assert.That(expectLimiting ? evnt != null : evnt == null);
+        }
+
+        [TestCase(1, 0.1)]
+        [TestCase(2, 0.1)]
+        [TestCase(5, 1)]
+        [TestCase(1, 2)]
+        public async Task EndpointRateLimiterBasics(int requests, double perSeconds)
+        {
+            var rateLimiter = new RateLimitGate("Test");
+            rateLimiter.AddGuard(new RateLimitGuard(RateLimitGuard.PerEndpoint, new PathStartFilter("/sapi/test"), requests, TimeSpan.FromSeconds(perSeconds), RateLimitWindowType.Fixed));
+
+            bool triggered = false;
+            rateLimiter.RateLimitTriggered += (x) => { triggered = true; };
+            var requestDefinition = new RequestDefinition("https://test.com", "/sapi/test", HttpMethod.Get);
+
+            for (var i = 0; i < requests + 1; i++)
+            {
+                var result1 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition, "123", 1, RateLimitingBehaviour.Wait, null, 1, default);
+                Assert.That(i == requests ? triggered : !triggered);
+            }
+            triggered = false;
+            await Task.Delay((int)Math.Round(perSeconds * 1000) + 10);
+            var result2 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition, "123", 1, RateLimitingBehaviour.Wait, null, 1, default);
+            Assert.That(!triggered);
+        }
+
+        [TestCase("/", false)]
+        [TestCase("/sapi/test", true)]
+        [TestCase("/sapi/test/123", false)]
+        public async Task EndpointRateLimiterEndpoints(string endpoint, bool expectLimited)
+        {
+            var rateLimiter = new RateLimitGate("Test");
+            rateLimiter.AddGuard(new RateLimitGuard(RateLimitGuard.PerEndpoint, new ExactPathFilter("/sapi/test"), 1, TimeSpan.FromSeconds(0.1), RateLimitWindowType.Fixed));
+
+            var requestDefinition = new RequestDefinition("https://test.com", endpoint, HttpMethod.Get);
+
+            RateLimitEvent? evnt = null;
+            rateLimiter.RateLimitTriggered += (x) => { evnt = x; };
+            for (var i = 0; i < 2; i++)
+            {
+                var result1 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition, "123", 1, RateLimitingBehaviour.Wait, null, 1, default);
+                bool expected = i == 1 ? expectLimited ? evnt?.DelayTime > TimeSpan.Zero : evnt == null : evnt == null;
+                Assert.That(expected);
+            }
+        }
+
+        [TestCase("/", false)]
+        [TestCase("/sapi/test", true)]
+        [TestCase("/sapi/test2", true)]
+        [TestCase("/sapi/test23", false)]
+        public async Task EndpointRateLimiterMultipleEndpoints(string endpoint, bool expectLimited)
+        {
+            var rateLimiter = new RateLimitGate("Test");
+            rateLimiter.AddGuard(new RateLimitGuard(RateLimitGuard.PerEndpoint, new ExactPathsFilter(new[] { "/sapi/test", "/sapi/test2" }), 1, TimeSpan.FromSeconds(0.1), RateLimitWindowType.Fixed));
+            var requestDefinition = new RequestDefinition("https://test.com", endpoint, HttpMethod.Get);
+
+            RateLimitEvent? evnt = null;
+            rateLimiter.RateLimitTriggered += (x) => { evnt = x; };
+            for (var i = 0; i < 2; i++)
+            {
+                var result1 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition, "123", 1, RateLimitingBehaviour.Wait, null, 1, default);
+                bool expected = i == 1 ? expectLimited ? evnt?.DelayTime > TimeSpan.Zero : evnt == null : evnt == null;
+                Assert.That(expected);
+            }
+        }
+
+        [TestCase("123", "123", "/sapi/test", "/sapi/test", true)]
+        [TestCase("123", "456", "/sapi/test", "/sapi/test", false)]
+        [TestCase("123", "123", "/sapi/test", "/sapi/test2", true)]
+        [TestCase("123", "123", "/sapi/test2", "/sapi/test", true)]
+        [TestCase(null, "123", "/sapi/test", "/sapi/test", false)]
+        [TestCase("123", null, "/sapi/test", "/sapi/test", false)]
+        [TestCase(null, null, "/sapi/test", "/sapi/test", false)]
+        public async Task ApiKeyRateLimiterBasics(string key1, string key2, string endpoint1, string endpoint2, bool expectLimited)
+        {
+            var rateLimiter = new RateLimitGate("Test");
+            rateLimiter.AddGuard(new RateLimitGuard(RateLimitGuard.PerApiKey, new AuthenticatedEndpointFilter(true), 1, TimeSpan.FromSeconds(0.1), RateLimitWindowType.Sliding));
+            var requestDefinition1 = new RequestDefinition("https://test.com", endpoint1, HttpMethod.Get) { Authenticated = key1 != null };
+            var requestDefinition2 = new RequestDefinition("https://test.com", endpoint2, HttpMethod.Get) { Authenticated = key2 != null };
+
+            RateLimitEvent? evnt = null;
+            rateLimiter.RateLimitTriggered += (x) => { evnt = x; };
+
+            var result1 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition1, key1, 1, RateLimitingBehaviour.Wait, null, 1, default);
+            Assert.That(evnt == null);
+            var result2 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition2, key2, 1, RateLimitingBehaviour.Wait, null, 1, default);
+            Assert.That(expectLimited ? evnt != null : evnt == null);
+        }
+
+        [TestCase("/sapi/test", "/sapi/test", true)]
+        [TestCase("/sapi/test1", "/api/test2", true)]
+        [TestCase("/", "/sapi/test2", true)]
+        public async Task TotalRateLimiterBasics(string endpoint1, string endpoint2, bool expectLimited)
+        {
+            var rateLimiter = new RateLimitGate("Test");
+            rateLimiter.AddGuard(new RateLimitGuard(RateLimitGuard.PerHost, Array.Empty<IGuardFilter>(), 1, TimeSpan.FromSeconds(0.1), RateLimitWindowType.Fixed));
+            var requestDefinition1 = new RequestDefinition("https://test.com", endpoint1, HttpMethod.Get);
+            var requestDefinition2 = new RequestDefinition("https://test.com", endpoint2, HttpMethod.Get) { Authenticated = true };
+
+            RateLimitEvent? evnt = null;
+            rateLimiter.RateLimitTriggered += (x) => { evnt = x; };
+
+            var result1 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition1, "123", 1, RateLimitingBehaviour.Wait, null, 1, default);
+            Assert.That(evnt == null);
+            var result2 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition2, null, 1, RateLimitingBehaviour.Wait, null, 1, default);
+            Assert.That(expectLimited ? evnt != null : evnt == null);
+        }
+
+        [TestCase("https://test.com", "/sapi/test", "https://test.com", "/sapi/test", true)]
+        [TestCase("https://test2.com", "/sapi/test", "https://test.com", "/sapi/test", false)]
+        [TestCase("https://test.com", "/sapi/test", "https://test2.com", "/sapi/test", false)]
+        [TestCase("https://test.com", "/sapi/test", "https://test.com", "/sapi/test2", true)]
+        public async Task HostRateLimiterBasics(string host1, string endpoint1, string host2, string endpoint2, bool expectLimited)
+        {
+            var rateLimiter = new RateLimitGate("Test");
+            rateLimiter.AddGuard(new RateLimitGuard(RateLimitGuard.PerHost, new HostFilter("https://test.com"), 1, TimeSpan.FromSeconds(0.1), RateLimitWindowType.Fixed));
+            var requestDefinition1 = new RequestDefinition(host1, endpoint1, HttpMethod.Get);
+            var requestDefinition2 = new RequestDefinition(host2, endpoint2, HttpMethod.Get) { Authenticated = true };
+
+            RateLimitEvent? evnt = null;
+            rateLimiter.RateLimitTriggered += (x) => { evnt = x; };
+
+            var result1 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition1, "123", 1, RateLimitingBehaviour.Wait, null, 1, default);
+            Assert.That(evnt == null);
+            var result2 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition2, "123", 1, RateLimitingBehaviour.Wait, null, 1, default);
+            Assert.That(expectLimited ? evnt != null : evnt == null);
+        }
+
+        [TestCase("https://test.com", "https://test.com", true)]
+        [TestCase("https://test2.com", "https://test.com", false)]
+        [TestCase("https://test.com", "https://test2.com", false)]
+        public async Task ConnectionRateLimiterBasics(string host1, string host2, bool expectLimited)
+        {
+            var rateLimiter = new RateLimitGate("Test");
+            rateLimiter.AddGuard(new RateLimitGuard(RateLimitGuard.PerHost, new LimitItemTypeFilter(RateLimitItemType.Connection), 1, TimeSpan.FromSeconds(0.1), RateLimitWindowType.Fixed));
+
+            RateLimitEvent? evnt = null;
+            rateLimiter.RateLimitTriggered += (x) => { evnt = x; };
+
+            var result1 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Connection, new RequestDefinition(host1, "1", HttpMethod.Get), "123", 1, RateLimitingBehaviour.Wait, null, 1, default);
+            Assert.That(evnt == null);
+            var result2 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Connection, new RequestDefinition(host2, "1", HttpMethod.Get), "123", 1, RateLimitingBehaviour.Wait, null, 1, default);
+            Assert.That(expectLimited ? evnt != null : evnt == null);
+        }
+
+        [Test]
+        public async Task ConnectionRateLimiterCancel()
+        {
+            var rateLimiter = new RateLimitGate("Test");
+            rateLimiter.AddGuard(new RateLimitGuard(RateLimitGuard.PerHost, new LimitItemTypeFilter(RateLimitItemType.Connection), 1, TimeSpan.FromSeconds(10), RateLimitWindowType.Fixed));
+
+            RateLimitEvent? evnt = null;
+            rateLimiter.RateLimitTriggered += (x) => { evnt = x; };
+            var ct = new CancellationTokenSource(TimeSpan.FromSeconds(0.2));
+
+            var result1 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Connection, new RequestDefinition("https://test.com", "1", HttpMethod.Get), "123", 1, RateLimitingBehaviour.Wait, null, 1, ct.Token);
+            var result2 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Connection, new RequestDefinition("https://test.com", "1", HttpMethod.Get), "123", 1, RateLimitingBehaviour.Wait, null, 1, ct.Token);
+            Assert.That(result2.Error, Is.TypeOf<CancellationRequestedError>());
+        }
+
+        [Test]
+        public async Task RateLimiterReset_Should_AllowNextRequestForSameDefinition()
+        {
+            // arrange
+            var rateLimiter = new RateLimitGate("Test");
+            rateLimiter.AddGuard(new RateLimitGuard(RateLimitGuard.PerConnection, new LimitItemTypeFilter(RateLimitItemType.Request), 1, TimeSpan.FromSeconds(10), RateLimitWindowType.Fixed));
+
+            var definition = new RequestDefinition("https://test.com", "1", HttpMethod.Get) { ConnectionId = 1 };
+
+            RateLimitEvent? evnt = null;
+            rateLimiter.RateLimitTriggered += (x) => { evnt = x; };
+            var ct = new CancellationTokenSource(TimeSpan.FromSeconds(0.2));
+
+            // act
+            var result1 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, definition, null, 1, RateLimitingBehaviour.Fail, null, 1, ct.Token);
+            await rateLimiter.ResetAsync(RateLimitItemType.Request, definition, null, null, null, default);
+            var result2 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, definition, null, 1, RateLimitingBehaviour.Fail, null, 1, ct.Token);
+            
+            // assert
+            Assert.That(evnt, Is.Null);
+        }
+
+        [Test]
+        public async Task RateLimiterReset_Should_NotAllowNextRequestForDifferentDefinition()
+        {
+            // arrange
+            var rateLimiter = new RateLimitGate("Test");
+            rateLimiter.AddGuard(new RateLimitGuard(RateLimitGuard.PerConnection, new LimitItemTypeFilter(RateLimitItemType.Request), 1, TimeSpan.FromSeconds(10), RateLimitWindowType.Fixed));
+
+            var definition1 = new RequestDefinition("https://test.com", "1", HttpMethod.Get) { ConnectionId = 1 };
+            var definition2 = new RequestDefinition("https://test.com", "2", HttpMethod.Get) { ConnectionId = 2 };
+
+            RateLimitEvent? evnt = null;
+            rateLimiter.RateLimitTriggered += (x) => { evnt = x; };
+
+            // act
+            var result1 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, definition1, null, 1, RateLimitingBehaviour.Fail, null, 1, default);
+            var result2 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, definition2, null, 1, RateLimitingBehaviour.Fail, null, 1, default);
+            await rateLimiter.ResetAsync(RateLimitItemType.Request, definition1, null, null, null, default);
+            var result3 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, definition2, null, 1, RateLimitingBehaviour.Fail, null, 1, default);
+            
+            // assert
+            Assert.That(evnt, Is.Not.Null);
+        }
+
+        [TestCase(null, null, true)]
+        [TestCase("Group1", null, false)]
+        [TestCase(null, "Group2", false)]
+        [TestCase("Group1", "Group2", false)]
+        [TestCase("Group3", "Group3", true)]
+        public async Task RateLimiterWithDifferentGroups_Should_LimitPerGroup(string? group1, string? group2, bool expectLimited)
+        {
+            // arrange
+            var data = JsonSerializer.Serialize(new TestObject { });
+            var client1 = new TestRestClient(x =>
+            {
+                x.RateLimitGroup = group1;
+            });
+            client1.ApiClient1.SetNextResponse(data, System.Net.HttpStatusCode.OK);
+            var client2 = new TestRestClient(x =>
+            {
+                x.RateLimitGroup = group2;
+            });
+            client2.ApiClient1.SetNextResponse(data, System.Net.HttpStatusCode.OK);
+
+            var rateLimiter = new RateLimitGate("Test");
+            rateLimiter.AddGuard(new RateLimitGuard(RateLimitGuard.PerHost, new LimitItemTypeFilter(RateLimitItemType.Request), 1, TimeSpan.FromSeconds(2), RateLimitWindowType.Fixed));
+
+            RateLimitEvent? evnt = null;
+            rateLimiter.RateLimitTriggered += (x) => { evnt = x; };
+
+            // act
+            var result1 = await client1.ApiClient1.GetResponseAsync<TestObject>(rateLimitGate: rateLimiter);
+            var result2 = await client2.ApiClient1.GetResponseAsync<TestObject>(rateLimitGate: rateLimiter);
+
+            // assert
+            Assert.That(evnt != null, Is.EqualTo(expectLimited));
+        }
+
+        [TestCase(RateLimitWindowType.Fixed)]
+        [TestCase(RateLimitWindowType.FixedAfterFirst)]
+        [TestCase(RateLimitWindowType.Sliding)]
+        [TestCase(RateLimitWindowType.Decay)]
+        public async Task LowerThreshold_ReservesCapacityForFullThreshold(RateLimitWindowType windowType)
+        {
+            var gate = new RateLimitGate("Test");
+            gate.AddGuard(new RateLimitGuard(
+                RateLimitGuard.PerHost,
+                new LimitItemTypeFilter(RateLimitItemType.Request),
+                10,
+                TimeSpan.FromHours(1),
+                windowType,
+                decayPerTimeSpan: 1));
+
+            var definition = new RequestDefinition(
+                "https://test.com", "/ticker", HttpMethod.Get);
+            var logger = new TraceLogger();
+
+            for (var i = 0; i < 8; i++)
+            {
+                var result = await gate.ProcessAsync(
+                    logger, i, RateLimitItemType.Request, definition, null, 1,
+                    RateLimitingBehaviour.Fail, null, 0.8, default);
+                Assert.That(result.Success, Is.True);
+            }
+
+            var marketData = await gate.ProcessAsync(
+                logger, 9, RateLimitItemType.Request, definition, null, 1,
+                RateLimitingBehaviour.Fail, null, 0.8, default);
+            Assert.That(marketData.Error, Is.TypeOf<ClientRateLimitError>());
+
+            var order = await gate.ProcessAsync(
+                logger, 10, RateLimitItemType.Request, definition, null, 2,
+                RateLimitingBehaviour.Fail, null, 1.0, default);
+            Assert.That(order.Success, Is.True);
+
+            var overHardLimit = await gate.ProcessAsync(
+                logger, 11, RateLimitItemType.Request, definition, null, 1,
+                RateLimitingBehaviour.Fail, null, 1.0, default);
+            Assert.That(overHardLimit.Error, Is.TypeOf<ClientRateLimitError>());
+        }
+
+        [TestCase(0.1, 10)]
+        [TestCase(1, 50)]
+        [TestCase(5, 250)]
+        [TestCase(60, 250)]
+        public void RateLimitSafetyMargin_DefaultIsProportionalAndCapped(double periodSeconds, int expectedMarginMilliseconds)
+        {
+            var margin = WindowTrackerHelpers.GetDefaultSafetyMargin(TimeSpan.FromSeconds(periodSeconds));
+
+            Assert.That(margin, Is.EqualTo(TimeSpan.FromMilliseconds(expectedMarginMilliseconds)));
+        }
+
+        [Test]
+        public void RateLimitGuard_ExplicitSafetyMarginIsUsed()
+        {
+            var guard = new RateLimitGuard(
+                RateLimitGuard.PerHost,
+                new LimitItemTypeFilter(RateLimitItemType.Request),
+                1,
+                TimeSpan.FromSeconds(1),
+                RateLimitWindowType.Sliding,
+                safetyMargin: TimeSpan.Zero);
+
+            Assert.That(guard.SafetyMargin, Is.EqualTo(TimeSpan.Zero));
+        }
+    }
+}

CryptoExchange.Net.UnitTests/RequestCoalescerTests.cs

@@ -0,0 +1,281 @@
+using CryptoExchange.Net.Objects;
+using Microsoft.Extensions.Logging.Abstractions;
+using NUnit.Framework;
+using System;
+using System.Collections;
+using System.Reflection;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace CryptoExchange.Net.UnitTests
+{
+    [TestFixture]
+    public class RequestCoalescerTests
+    {
+        private static readonly TimeSpan _testTimeout = TimeSpan.FromSeconds(5);
+
+        [Test]
+        public async Task ExecuteAsync_WithIdenticalRequests_ShouldExecuteRequestOnce()
+        {
+            var coalescer = CreateCoalescer();
+            var key = CreateKey();
+            var requestCompletion = CreateCompletionSource<string>();
+            var requestStarted = CreateCompletionSource<bool>();
+            var requestCount = 0;
+
+            async Task<string> ExecuteRequest(CancellationToken cancellationToken)
+            {
+                Interlocked.Increment(ref requestCount);
+                requestStarted.TrySetResult(true);
+                return await requestCompletion.Task;
+            }
+
+            var first = coalescer.ExecuteAsync(key, ExecuteRequest, () => "canceled", CancellationToken.None);
+            await requestStarted.Task.WaitAsync(_testTimeout);
+            var second = coalescer.ExecuteAsync(key, ExecuteRequest, () => "canceled", CancellationToken.None);
+
+            Assert.That(requestCount, Is.EqualTo(1));
+
+            requestCompletion.SetResult("result");
+
+            Assert.That(await first.WaitAsync(_testTimeout), Is.EqualTo("result"));
+            Assert.That(await second.WaitAsync(_testTimeout), Is.EqualTo("result"));
+            Assert.That(requestCount, Is.EqualTo(1));
+        }
+
+        [Test]
+        public async Task ExecuteAsync_WithDifferentKeys_ShouldExecuteEachRequest()
+        {
+            var coalescer = CreateCoalescer();
+            var firstCompletion = CreateCompletionSource<string>();
+            var secondCompletion = CreateCompletionSource<string>();
+            var firstStarted = CreateCompletionSource<bool>();
+            var secondStarted = CreateCompletionSource<bool>();
+            var requestCount = 0;
+
+            var first = coalescer.ExecuteAsync(
+                CreateKey(parameters: "symbol=ETH"),
+                async cancellationToken =>
+                {
+                    Interlocked.Increment(ref requestCount);
+                    firstStarted.TrySetResult(true);
+                    return await firstCompletion.Task;
+                },
+                () => "canceled",
+                CancellationToken.None);
+
+            var second = coalescer.ExecuteAsync(
+                CreateKey(parameters: "symbol=BTC"),
+                async cancellationToken =>
+                {
+                    Interlocked.Increment(ref requestCount);
+                    secondStarted.TrySetResult(true);
+                    return await secondCompletion.Task;
+                },
+                () => "canceled",
+                CancellationToken.None);
+
+            await Task.WhenAll(firstStarted.Task, secondStarted.Task).WaitAsync(_testTimeout);
+            Assert.That(requestCount, Is.EqualTo(2));
+
+            firstCompletion.SetResult("first");
+            secondCompletion.SetResult("second");
+
+            Assert.That(await first.WaitAsync(_testTimeout), Is.EqualTo("first"));
+            Assert.That(await second.WaitAsync(_testTimeout), Is.EqualTo("second"));
+        }
+
+        [Test]
+        public async Task ExecuteAsync_WhenOneListenerCancels_ShouldKeepSharedRequestRunning()
+        {
+            var coalescer = CreateCoalescer();
+            var requestCompletion = CreateCompletionSource<string>();
+            var requestStarted = CreateCompletionSource<CancellationToken>();
+            var requestCount = 0;
+            using var firstCancellationSource = new CancellationTokenSource();
+
+            async Task<string> ExecuteRequest(CancellationToken cancellationToken)
+            {
+                Interlocked.Increment(ref requestCount);
+                requestStarted.TrySetResult(cancellationToken);
+                return await requestCompletion.Task;
+            }
+
+            var first = coalescer.ExecuteAsync(CreateKey(), ExecuteRequest, () => "canceled", firstCancellationSource.Token);
+            var requestCancellationToken = await requestStarted.Task.WaitAsync(_testTimeout);
+            var second = coalescer.ExecuteAsync(CreateKey(), ExecuteRequest, () => "canceled", CancellationToken.None);
+
+            firstCancellationSource.Cancel();
+
+            Assert.That(await first.WaitAsync(_testTimeout), Is.EqualTo("canceled"));
+            Assert.That(requestCancellationToken.IsCancellationRequested, Is.False);
+            Assert.That(requestCount, Is.EqualTo(1));
+
+            requestCompletion.SetResult("result");
+
+            Assert.That(await second.WaitAsync(_testTimeout), Is.EqualTo("result"));
+        }
+
+        [Test]
+        public async Task ExecuteAsync_WhenAllListenersCancel_ShouldCancelSharedRequest()
+        {
+            var coalescer = CreateCoalescer();
+            var requestStarted = CreateCompletionSource<bool>();
+            var requestCanceled = CreateCompletionSource<bool>();
+            using var firstCancellationSource = new CancellationTokenSource();
+            using var secondCancellationSource = new CancellationTokenSource();
+
+            async Task<string> ExecuteRequest(CancellationToken cancellationToken)
+            {
+                using (cancellationToken.Register(() => requestCanceled.TrySetResult(true)))
+                {
+                    requestStarted.TrySetResult(true);
+                    await requestCanceled.Task;
+                    return "request canceled";
+                }
+            }
+
+            var first = coalescer.ExecuteAsync(CreateKey(), ExecuteRequest, () => "listener canceled", firstCancellationSource.Token);
+            await requestStarted.Task.WaitAsync(_testTimeout);
+            var second = coalescer.ExecuteAsync(CreateKey(), ExecuteRequest, () => "listener canceled", secondCancellationSource.Token);
+
+            firstCancellationSource.Cancel();
+            Assert.That(await first.WaitAsync(_testTimeout), Is.EqualTo("listener canceled"));
+            Assert.That(requestCanceled.Task.IsCompleted, Is.False);
+
+            secondCancellationSource.Cancel();
+
+            Assert.That(await second.WaitAsync(_testTimeout), Is.EqualTo("listener canceled"));
+            Assert.That(await requestCanceled.Task.WaitAsync(_testTimeout), Is.True);
+        }
+
+        [Test]
+        public async Task ExecuteAsync_WithAlreadyCanceledListener_ShouldNotStartRequest()
+        {
+            var coalescer = CreateCoalescer();
+            var requestCount = 0;
+            using var cancellationSource = new CancellationTokenSource();
+            cancellationSource.Cancel();
+
+            var result = await coalescer.ExecuteAsync(
+                CreateKey(),
+                cancellationToken =>
+                {
+                    Interlocked.Increment(ref requestCount);
+                    return Task.FromResult("result");
+                },
+                () => "canceled",
+                cancellationSource.Token);
+
+            Assert.That(result, Is.EqualTo("canceled"));
+            Assert.That(requestCount, Is.Zero);
+        }
+
+        [Test]
+        public async Task ExecuteAsync_AfterRequestCompletes_ShouldStartNewRequest()
+        {
+            var coalescer = CreateCoalescer();
+            var requestCount = 0;
+
+            Task<int> ExecuteRequest(CancellationToken cancellationToken)
+                => Task.FromResult(Interlocked.Increment(ref requestCount));
+
+            var first = await coalescer.ExecuteAsync(CreateKey(typeof(int)), ExecuteRequest, () => -1, CancellationToken.None);
+            var second = await coalescer.ExecuteAsync(CreateKey(typeof(int)), ExecuteRequest, () => -1, CancellationToken.None);
+
+            Assert.That(first, Is.EqualTo(1));
+            Assert.That(second, Is.EqualTo(2));
+            Assert.That(requestCount, Is.EqualTo(2));
+        }
+
+        [Test]
+        public void ExecuteAsync_AfterRequestFails_ShouldStartNewRequest()
+        {
+            var coalescer = CreateCoalescer();
+            var requestCount = 0;
+
+            Task<string> ExecuteRequest(CancellationToken cancellationToken)
+            {
+                if (Interlocked.Increment(ref requestCount) == 1)
+                    return Task.FromException<string>(new InvalidOperationException("Request failed"));
+
+                return Task.FromResult("result");
+            }
+
+            Assert.ThrowsAsync<InvalidOperationException>(async () =>
+                await coalescer.ExecuteAsync(CreateKey(), ExecuteRequest, () => "canceled", CancellationToken.None));
+
+            Assert.That(
+                coalescer.ExecuteAsync(CreateKey(), ExecuteRequest, () => "canceled", CancellationToken.None).GetAwaiter().GetResult(),
+                Is.EqualTo("result"));
+            Assert.That(requestCount, Is.EqualTo(2));
+        }
+
+        [Test]
+        public async Task ExecuteAsync_WhenAbandonedRequestCompletes_ShouldNotRemoveReplacementRequest()
+        {
+            var coalescer = CreateCoalescer();
+            var key = CreateKey();
+            var oldRequestCompletion = CreateCompletionSource<string>();
+            var oldRequestStarted = CreateCompletionSource<bool>();
+            var replacementCompletion = CreateCompletionSource<string>();
+            var replacementStarted = CreateCompletionSource<bool>();
+            var requestCount = 0;
+            using var cancellationSource = new CancellationTokenSource();
+
+            async Task<string> ExecuteOldRequest(CancellationToken cancellationToken)
+            {
+                Interlocked.Increment(ref requestCount);
+                oldRequestStarted.TrySetResult(true);
+                return await oldRequestCompletion.Task;
+            }
+
+            async Task<string> ExecuteReplacementRequest(CancellationToken cancellationToken)
+            {
+                Interlocked.Increment(ref requestCount);
+                replacementStarted.TrySetResult(true);
+                return await replacementCompletion.Task;
+            }
+
+            var abandonedListener = coalescer.ExecuteAsync(key, ExecuteOldRequest, () => "canceled", cancellationSource.Token);
+            await oldRequestStarted.Task.WaitAsync(_testTimeout);
+            var oldPhysicalRequest = GetPhysicalRequest(coalescer, key);
+
+            cancellationSource.Cancel();
+            Assert.That(await abandonedListener.WaitAsync(_testTimeout), Is.EqualTo("canceled"));
+
+            var replacementListener = coalescer.ExecuteAsync(key, ExecuteReplacementRequest, () => "canceled", CancellationToken.None);
+            await replacementStarted.Task.WaitAsync(_testTimeout);
+
+            oldRequestCompletion.SetResult("old result");
+            await oldPhysicalRequest.WaitAsync(_testTimeout);
+
+            var joinedReplacementListener = coalescer.ExecuteAsync(key, ExecuteReplacementRequest, () => "canceled", CancellationToken.None);
+            Assert.That(requestCount, Is.EqualTo(2));
+
+            replacementCompletion.SetResult("replacement result");
+
+            Assert.That(await replacementListener.WaitAsync(_testTimeout), Is.EqualTo("replacement result"));
+            Assert.That(await joinedReplacementListener.WaitAsync(_testTimeout), Is.EqualTo("replacement result"));
+            Assert.That(requestCount, Is.EqualTo(2));
+        }
+
+        private static RequestCoalescer CreateCoalescer()
+            => new RequestCoalescer(NullLogger.Instance);
+
+        private static RequestCoalescingKey CreateKey(Type? responseType = null, string? parameters = null)
+            => new RequestCoalescingKey("GET", "https://localhost/test", parameters, responseType ?? typeof(string));
+
+        private static TaskCompletionSource<T> CreateCompletionSource<T>()
+            => new TaskCompletionSource<T>(TaskCreationOptions.RunContinuationsAsynchronously);
+
+        private static Task GetPhysicalRequest(RequestCoalescer coalescer, RequestCoalescingKey key)
+        {
+            var requestsField = typeof(RequestCoalescer).GetField("_requests", BindingFlags.Instance | BindingFlags.NonPublic)!;
+            var requests = (IDictionary)requestsField.GetValue(coalescer)!;
+            var entry = requests[key]!;
+            var requestProperty = entry.GetType().GetProperty("Request")!;
+            return ((Lazy<Task<object>>)requestProperty.GetValue(entry)!).Value;
+        }
+    }
+}

CryptoExchange.Net.UnitTests/SharedApiClientTests.cs

@@ -0,0 +1,355 @@
+using CryptoExchange.Net.Interfaces.Clients;
+using CryptoExchange.Net.RateLimiting;
+using CryptoExchange.Net.SharedApis;
+using Microsoft.Extensions.DependencyInjection;
+using NUnit.Framework;
+using System;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace CryptoExchange.Net.UnitTests
+{
+    [TestFixture]
+    internal class SharedApiClientTests
+    {
+        [Test]
+        public void GetCapability_ShouldUseCapabilityTradingModes()
+        {
+            var sharedApi = new TestSharedApi(
+                [TradingMode.Spot, TradingMode.PerpetualLinear],
+                [TradingMode.Spot]);
+            var client = new TestSharedApiClient(sharedApi);
+
+            Assert.Multiple(() =>
+            {
+                Assert.That(client.GetCapability<ITestCapability>(TradingMode.Spot)?.Capability, Is.SameAs(sharedApi));
+                Assert.That(client.GetCapability<ITestCapability>(TradingMode.PerpetualLinear), Is.Null);
+                Assert.That(client.GetCapabilities<ITestCapability>(TradingMode.Spot), Has.Count.EqualTo(1));
+                Assert.That(client.GetCapabilities<ITestCapability>(TradingMode.PerpetualLinear), Is.Empty);
+            });
+        }
+
+        [Test]
+        public void CapabilityTradingModes_ShouldDefaultToSharedApiTradingModes()
+        {
+            var sharedApi = new TestSharedApi(
+                [TradingMode.Spot, TradingMode.PerpetualLinear],
+                null);
+            var client = new TestSharedApiClient(sharedApi);
+
+            Assert.Multiple(() =>
+            {
+                Assert.That(client.GetCapability<ITestCapability>(TradingMode.Spot)?.Capability, Is.SameAs(sharedApi));
+                Assert.That(client.GetCapability<ITestCapability>(TradingMode.PerpetualLinear)?.Capability, Is.SameAs(sharedApi));
+            });
+        }
+
+        [Test]
+        public void GetCapabilities_WithReference_ShouldReturnMatchingCapabilities()
+        {
+            var sharedApi = new TestSharedApi(
+                [TradingMode.Spot],
+                [TradingMode.Spot]);
+            var client = new TestSharedApiClient(sharedApi);
+
+            var result = client.GetCapabilities(
+                new SharedCapabilityReference<ITestCapability>(),
+                TradingMode.Spot);
+
+            Assert.That(result, Has.Count.EqualTo(1));
+            Assert.That(result[0].Capability, Is.SameAs(sharedApi));
+            Assert.That(result[0].Options, Is.SameAs(sharedApi.CapabilityOptions));
+        }
+
+        [Test]
+        public void Discover_ShouldReturnAllSharedApiInformation()
+        {
+            var restApi = new TestRestSharedApi();
+            var socketApi = new TestSocketSharedApi();
+            var client = new TestDiSharedApiClient(
+                restApi,
+                socketApi);
+
+            var result = client.Discover();
+
+            Assert.Multiple(() =>
+            {
+                Assert.That(result.PreferredTransport, Is.EqualTo(SharedTransport.Socket));
+                Assert.That(result.SharedApis, Has.Length.EqualTo(2));
+                Assert.That(result.SharedApis[0].Transport, Is.EqualTo(SharedTransport.Rest));
+                Assert.That(result.SharedApis[1].Transport, Is.EqualTo(SharedTransport.Socket));
+                Assert.That(result.SharedApis[0].SupportedTradingModes, Is.EqualTo(new[] { TradingMode.Spot }));
+                Assert.That(result.SharedApis[0].Capabilities, Has.Length.EqualTo(1));
+                Assert.That(result.SharedApis[0].Authenticated, Is.False);
+            });
+        }
+
+        [Test]
+        public void RegisterSharedApiClient_ShouldResolvePreferredTransport()
+        {
+            var restApi = new TestRestSharedApi();
+            var socketApi = new TestSocketSharedApi();
+            var services = new ServiceCollection();
+
+            services.AddSingleton(restApi);
+            services.AddSingleton(socketApi);
+
+            services.RegisterSharedApiClient<
+                ITestSharedApiClient,
+                TestDiSharedApiClient>(sharedApis => sharedApis
+                    .Add(client => client.Rest)
+                    .Add(client => client.Socket));
+
+            using var provider = services.BuildServiceProvider();
+
+            Assert.Multiple(() =>
+            {
+                Assert.That(
+                    provider.GetRequiredService<ITestSharedApiClient>(),
+                    Is.Not.Null);
+
+                Assert.That(
+                    provider.GetRequiredService<ISharedApiClientBase>(),
+                    Is.InstanceOf<TestDiSharedApiClient>());
+
+                Assert.That(
+                    provider.GetRequiredService<ITestCapability>(),
+                    Is.SameAs(socketApi));
+
+                Assert.That(
+                    provider.GetServices<ITestCapability>().ToArray(),
+                    Is.EqualTo(new[] { socketApi }));
+
+                Assert.That(
+                    provider.GetRequiredService<ITestRestCapability>(),
+                    Is.SameAs(restApi));
+
+                Assert.That(
+                    provider.GetRequiredService<ITestSocketCapability>(),
+                    Is.SameAs(socketApi));
+            });
+        }
+
+        [Test]
+        public void CapabilityTradingModes_ShouldIntersectApiApplicableAndOverrideModes()
+        {
+            var sharedApi = new TestSharedApi(
+                [TradingMode.Spot, TradingMode.PerpetualLinear, TradingMode.DeliveryLinear],
+                [TradingMode.Spot, TradingMode.PerpetualLinear],
+                [TradingMode.PerpetualLinear, TradingMode.DeliveryLinear]);
+
+            Assert.That(
+                sharedApi.CapabilityOptions.SupportedTradingModes,
+                Is.EqualTo(new[] { TradingMode.PerpetualLinear }));
+        }
+
+        [Test]
+        public void CapabilityOptions_ShouldApplyIntrinsicTradingModes()
+        {
+            var apiModes = new[]
+            {
+                TradingMode.Spot,
+                TradingMode.PerpetualLinear,
+                TradingMode.DeliveryLinear,
+                TradingMode.PerpetualInverse,
+                TradingMode.DeliveryInverse
+            };
+            var spotOptions = new PlaceSpotOrderOptions("TestExchange");
+            var futuresOptions = new GetPositionsOptions("TestExchange", false);
+            var perpetualOptions = new GetFundingRateHistoryOptions(
+                "TestExchange",
+                true,
+                true,
+                true,
+                100,
+                false);
+            var unrestrictedOptions = new GetTickerOptions("TestExchange");
+
+            _ = new TestOptionsHost(apiModes, spotOptions);
+            _ = new TestOptionsHost(apiModes, futuresOptions);
+            _ = new TestOptionsHost(apiModes, perpetualOptions);
+            _ = new TestOptionsHost(apiModes, unrestrictedOptions);
+
+            Assert.Multiple(() =>
+            {
+                Assert.That(spotOptions.SupportedTradingModes, Is.EqualTo(new[] { TradingMode.Spot }));
+                Assert.That(futuresOptions.SupportedTradingModes, Is.EqualTo(new[]
+                {
+                    TradingMode.PerpetualLinear,
+                    TradingMode.DeliveryLinear,
+                    TradingMode.PerpetualInverse,
+                    TradingMode.DeliveryInverse
+                }));
+                Assert.That(perpetualOptions.SupportedTradingModes, Is.EqualTo(new[]
+                {
+                    TradingMode.PerpetualLinear,
+                    TradingMode.PerpetualInverse
+                }));
+                Assert.That(unrestrictedOptions.SupportedTradingModes, Is.EqualTo(apiModes));
+            });
+        }
+
+        private interface ITestCapability : ISharedApiCapability
+        {
+        }
+
+        private sealed class TestApiClient : IBaseApiClient
+        {
+            public string Exchange => "TestExchange";
+            public string BaseAddress => "https://test.invalid";
+
+            public string FormatSymbol(
+                string baseAsset,
+                string quoteAsset,
+                TradingMode tradingMode,
+                DateTime? deliverDate = null)
+                => $"{baseAsset}{quoteAsset}";
+
+            public Task<TResult> WithRateLimitAdmissionAsync<TResult>(
+                RateLimitAdmission admission,
+                Func<Task<TResult>> operation)
+                => operation();
+        }
+
+        private interface ITestRestCapability : ITestCapability, ISharedRest
+        {
+        }
+
+        private interface ITestSocketCapability : ITestCapability, ISharedSocket
+        {
+        }
+
+        private interface ITestRestSharedApi : ITestRestCapability
+        {
+        }
+
+        private interface ITestSocketSharedApi : ITestSocketCapability
+        {
+        }
+
+        private interface ITestSharedApiClient : ISharedApiClientBase
+        {
+            ITestRestSharedApi Rest { get; }
+            ITestSocketSharedApi Socket { get; }
+        }
+
+        private sealed class TestCapabilityOptions : CapabilityOptions<SharedRequest, ITestCapability>
+        {
+            public override string Description => "Test capability";
+
+            public TestCapabilityOptions(TradingMode[]? applicableTradingModes)
+                : base("TestExchange", false, "TestOperation", [], applicableTradingModes)
+            {
+            }
+        }
+
+        private sealed class TestSharedApi : SharedApiBase, ITestCapability
+        {
+            public TestCapabilityOptions CapabilityOptions { get; }
+
+            public TestSharedApi(TradingMode[] apiTradingModes, TradingMode[]? capabilityTradingModes)
+                : this(apiTradingModes, capabilityTradingModes, null)
+            {
+            }
+
+            public TestSharedApi(
+                TradingMode[] apiTradingModes,
+                TradingMode[]? capabilityTradingModes,
+                TradingMode[]? applicableTradingModes)
+                : base(
+                    SharedTransport.Rest,
+                    new TestApiClient(),
+                    apiTradingModes,
+                    () => false,
+                    (baseAsset, quoteAsset, tradingMode, deliverDate) => $"{baseAsset}{quoteAsset}")
+            {
+                var options = new TestCapabilityOptions(applicableTradingModes)
+                {
+                    SupportedTradingModeOverrides = capabilityTradingModes
+                };
+
+                SetCapabilities(options);
+                CapabilityOptions = options;
+            }
+
+            public override SharedClientInfo Discover() => new();
+        }
+
+        private sealed class TestOptionsHost : SharedApiBase
+        {
+            public TestOptionsHost(TradingMode[] apiTradingModes, CapabilityOptions capabilityOptions)
+                : base(
+                    SharedTransport.Rest,
+                    new TestApiClient(),
+                    apiTradingModes,
+                    () => false,
+                    (baseAsset, quoteAsset, tradingMode, deliverDate) => $"{baseAsset}{quoteAsset}")
+            {
+                SetCapabilities(capabilityOptions);
+            }
+
+            public override SharedClientInfo Discover() => new();
+        }
+
+        private abstract class TestTransportSharedApi : SharedApiBase
+        {
+            protected TestTransportSharedApi(SharedTransport transport)
+                : base(
+                    transport,
+                    new TestApiClient(),
+                    [TradingMode.Spot],
+                    () => false,
+                    (baseAsset, quoteAsset, tradingMode, deliverDate) => $"{baseAsset}{quoteAsset}")
+            {
+                SetCapabilities(new TestCapabilityOptions([TradingMode.Spot]));
+            }
+
+            public override SharedClientInfo Discover() => new()
+            {
+                Exchange = this.Exchange,
+                TypeName = GetType().Name,
+                SupportedTradingModes = this.SupportedTradingModes,
+                Transport = this.Transport,
+                Authenticated = this.Authenticated,
+                Capabilities = ((ISharedApi)this).Capabilities.ToArray()
+            };
+        }
+
+        private sealed class TestRestSharedApi : TestTransportSharedApi, ITestRestSharedApi
+        {
+            public TestRestSharedApi() : base(SharedTransport.Rest)
+            {
+            }
+        }
+
+        private sealed class TestSocketSharedApi : TestTransportSharedApi, ITestSocketSharedApi
+        {
+            public TestSocketSharedApi() : base(SharedTransport.Socket)
+            {
+            }
+        }
+
+        private sealed class TestDiSharedApiClient : SharedApiClientBase, ITestSharedApiClient
+        {
+            public ITestRestSharedApi Rest { get; }
+            public ITestSocketSharedApi Socket { get; }
+
+            public TestDiSharedApiClient(
+                TestRestSharedApi rest,
+                TestSocketSharedApi socket)
+                : base(SharedTransport.Socket, rest, socket)
+            {
+                Rest = rest;
+                Socket = socket;
+            }
+        }
+
+        private sealed class TestSharedApiClient : SharedApiClientBase
+        {
+            public TestSharedApiClient(params ISharedApiCapability[] sharedApis)
+                : base(SharedTransport.Rest, sharedApis)
+            {
+            }
+        }
+    }
+}

CryptoExchange.Net.UnitTests/SharedCapabilitiesTests.cs

@@ -0,0 +1,89 @@
+using CryptoExchange.Net.SharedApis;
+using NUnit.Framework;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+
+namespace CryptoExchange.Net.UnitTests
+{
+    [TestFixture]
+    internal class SharedCapabilitiesTests
+    {
+        [Test]
+        public void AllSharedApiCapabilities_ShouldBeListedInSharedCapabilities()
+        {
+            var markerTypes = new[]
+            {
+                typeof(ISharedApiCapability),
+                typeof(ISharedRest),
+                typeof(ISharedSocket),
+                typeof(ISharedSubscription)
+            };
+
+            var expectedCapabilities = typeof(ISharedApiCapability).Assembly
+                .GetTypes()
+                .Where(x => x.IsInterface
+                            && typeof(ISharedApiCapability).IsAssignableFrom(x)
+                            && !markerTypes.Contains(x))
+                .OrderBy(x => x.FullName)
+                .ToArray();
+
+            var listedCapabilities = GetTypeAndNestedTypes(typeof(SharedCapabilities))
+                .SelectMany(x => x.GetProperties(
+                    BindingFlags.Public | BindingFlags.Static | BindingFlags.DeclaredOnly))
+                .SelectMany(x => x.PropertyType.GetGenericArguments())
+                .Where(x => x.IsInterface
+                            && typeof(ISharedApiCapability).IsAssignableFrom(x))
+                .ToArray();
+
+            var missingCapabilities = expectedCapabilities
+                .Except(listedCapabilities)
+                .Select(x => x.Name)
+                .ToArray();
+
+            var unknownCapabilities = listedCapabilities
+                .Except(expectedCapabilities)
+                .Select(x => x.Name)
+                .ToArray();
+
+            var duplicateCapabilities = listedCapabilities
+                .GroupBy(x => x)
+                .Where(x => x.Count() > 1)
+                .Select(x => x.Key.Name)
+                .ToArray();
+
+            Assert.Multiple(() =>
+            {
+                Assert.That(
+                    missingCapabilities,
+                    Is.Empty,
+                    $"Capabilities missing from SharedCapabilities: " +
+                    string.Join(", ", missingCapabilities));
+
+                Assert.That(
+                    unknownCapabilities,
+                    Is.Empty,
+                    $"Unknown capabilities listed in SharedCapabilities: " +
+                    string.Join(", ", unknownCapabilities));
+
+                Assert.That(
+                    duplicateCapabilities,
+                    Is.Empty,
+                    $"Capabilities listed multiple times in SharedCapabilities: " +
+                    string.Join(", ", duplicateCapabilities));
+            });
+        }
+
+        private static IEnumerable<Type> GetTypeAndNestedTypes(Type type)
+        {
+            yield return type;
+
+            foreach (var nestedType in type.GetNestedTypes(BindingFlags.Public))
+            {
+                foreach (var result in GetTypeAndNestedTypes(nestedType))
+                    yield return result;
+            }
+        }
+    }
+}

CryptoExchange.Net.UnitTests/SharedParametersTests.cs

@@ -0,0 +1,180 @@
+using NUnit.Framework;
+using CryptoExchange.Net.SharedApis;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+
+namespace CryptoExchange.Net.UnitTests
+{
+    [TestFixture]
+    internal class SharedParametersTests
+    {
+        [Test]
+        public void AllSharedAPIOptions_ShouldListAllDefaultParametersInRequestParameterRules()
+        {
+            var failures = new List<string>();
+
+            var optionsTypes = typeof(CapabilityOptions).Assembly
+                .GetTypes()
+                .Where(x => x.IsClass
+                            && !x.IsAbstract
+                            && typeof(CapabilityOptions).IsAssignableFrom(x))
+                .OrderBy(x => x.FullName)
+                .ToArray();
+
+            foreach (var optionsType in optionsTypes)
+            {
+                var genericOptionsType = GetGenericOptionsType(optionsType);
+                if (genericOptionsType == null)
+                {
+                    if (optionsType == typeof(ClosePositionOptions))
+                        continue;
+
+                    failures.Add($"{optionsType.Name}: unable to determine request type");
+                    continue;
+                }
+
+                var requestType = genericOptionsType.GetGenericArguments()[0];
+                var defaultRulesField = GetDefaultParameterRulesField(optionsType);
+                if (defaultRulesField == null)
+                {
+                    failures.Add($"{optionsType.Name}: no _defaultParameterRules field found");
+                    continue;
+                }
+
+                var rules = (RequestParameterDescription[]?)defaultRulesField.GetValue(null);
+                if (rules == null)
+                {
+                    failures.Add($"{optionsType.Name}: _defaultParameterRules is null");
+                    continue;
+                }
+
+                var constructorParameterNames = requestType
+                    .GetConstructors(BindingFlags.Instance | BindingFlags.Public)
+                    .SelectMany(x => x.GetParameters())
+                    .Where(x => !string.Equals(
+                        x.Name,
+                        "exchangeParameters",
+                        StringComparison.OrdinalIgnoreCase))
+                    .Select(x => x.Name!)
+                    .ToHashSet(StringComparer.OrdinalIgnoreCase);
+
+                var parameterProperties = requestType
+                    .GetProperties(BindingFlags.Instance | BindingFlags.Public)
+                    .Where(x => x.DeclaringType == requestType
+                                || constructorParameterNames.Contains(x.Name))
+                    .Where(x => x.Name != nameof(SharedRequest.ExchangeParameters))
+                    .Select(x => x.Name)
+                    .OrderBy(x => x)
+                    .ToArray();
+
+                var ruleNames = rules
+                    .Select(x => x.Name)
+                    .ToHashSet(StringComparer.Ordinal);
+
+                foreach (var parameterProperty in parameterProperties)
+                {
+                    if (!ruleNames.Contains(parameterProperty))
+                    {
+                        failures.Add(
+                            $"{optionsType.Name}: request property " +
+                            $"{requestType.Name}.{parameterProperty} has no default request parameter rule");
+                    }
+                }
+            }
+
+            Assert.That(
+                failures,
+                Is.Empty,
+                $"Missing default request parameter rules:{Environment.NewLine}" +
+                string.Join(Environment.NewLine, failures));
+        }
+
+        [Test]
+        public void RequiredExchangeParameter_ShouldAcceptNameOrAnyAlias()
+        {
+            const string exchange = "TestExchange";
+            var options = new GetTickerOptions(exchange)
+            {
+                ExchangeParameterRules =
+                [
+                    ExchangeParameterRule.Required(
+                        "Parameter",
+                        "Test parameter",
+                        1,
+                        "Alias1",
+                        "Alias2")
+                ]
+            };
+
+            var missingResult = options.ValidateRequest(null, null, [TradingMode.Spot]);
+            var nameResult = options.ValidateRequest(
+                new ExchangeParameters(new ExchangeParameter(exchange, "Parameter", 1)),
+                null,
+                [TradingMode.Spot]);
+            var firstAliasResult = options.ValidateRequest(
+                new ExchangeParameters(new ExchangeParameter(exchange, "Alias1", 1)),
+                null,
+                [TradingMode.Spot]);
+            var secondAliasResult = options.ValidateRequest(
+                new ExchangeParameters(new ExchangeParameter(exchange, "Alias2", 1)),
+                null,
+                [TradingMode.Spot]);
+
+            Assert.Multiple(() =>
+            {
+                Assert.That(missingResult, Is.Not.Null);
+                Assert.That(nameResult, Is.Null);
+                Assert.That(firstAliasResult, Is.Null);
+                Assert.That(secondAliasResult, Is.Null);
+            });
+        }
+
+        [Test]
+        public void RequiredExchangeParameterWithoutAliases_ShouldBeRequired()
+        {
+            const string exchange = "TestExchange";
+            var options = new GetTickerOptions(exchange)
+            {
+                ExchangeParameterRules =
+                [
+                    ExchangeParameterRule.Required(
+                        "Parameter",
+                        "Test parameter",
+                        1)
+                ]
+            };
+
+            var result = options.ValidateRequest(null, null, [TradingMode.Spot]);
+
+            Assert.That(result, Is.Not.Null);
+        }
+
+        private static Type? GetGenericOptionsType(Type optionsType)
+        {
+            for (var type = optionsType; type != null; type = type.BaseType)
+            {
+                if (type.IsGenericType
+                    && type.GetGenericTypeDefinition() == typeof(CapabilityOptions<,>))
+                    return type;
+            }
+
+            return null;
+        }
+
+        private static FieldInfo? GetDefaultParameterRulesField(Type optionsType)
+        {
+            for (var type = optionsType; type != null; type = type.BaseType)
+            {
+                var field = type.GetField(
+                    "_defaultParameterRules",
+                    BindingFlags.Static | BindingFlags.NonPublic | BindingFlags.DeclaredOnly);
+                if (field != null)
+                    return field;
+            }
+
+            return null;
+        }
+    }
+}

CryptoExchange.Net.UnitTests/SocketRoutingTests/QueryRouterTests.cs

@@ -16,9 +16,9 @@ namespace CryptoExchange.Net.UnitTests.SocketRoutingTests
             // arrange
             var routes = new MessageRoute[]
             {
-                MessageRoute<string>.CreateWithoutTopicFilter("type1", (_, _, _, _) => null),
-                MessageRoute<string>.CreateWithTopicFilter("type1", "topic1", (_, _, _, _) => null),
-                MessageRoute<int>.CreateWithTopicFilter("type2", "topic2", (_, _, _, _) => null)
+                MessageRoute.CreateForEvent<string>("type1", (_, _, _, _) => null),
+                MessageRoute.CreateForEvent<string>("type1", "topic1", (_, _, _, _) => null),
+                MessageRoute.CreateForEvent<int>("type2", "topic2", (_, _, _, _) => null)
             };
 
             var router = new QueryRouter(routes);
@@ -46,10 +46,10 @@ namespace CryptoExchange.Net.UnitTests.SocketRoutingTests
             var collection = new QueryRouteCollection(typeof(string));
 
             // act
-            collection.AddRoute(null, MessageRoute<string>.CreateWithoutTopicFilter("type", (_, _, _, _) => null));
+            collection.AddRoute(null, MessageRoute.CreateForEvent<string>("type", (_, _, _, _) => null));
             var beforeMultipleReaders = collection.MultipleReaders;
 
-            collection.AddRoute("topic", MessageRoute<string>.CreateWithTopicFilter("type", "topic", (_, _, _, _) => null, true));
+            collection.AddRoute("topic", MessageRoute.CreateForEvent<string>("type", "topic", (_, _, _, _) => null, true));
             var afterMultipleReaders = collection.MultipleReaders;
 
             // assert
@@ -63,12 +63,12 @@ namespace CryptoExchange.Net.UnitTests.SocketRoutingTests
             // arrange
             var calls = new List<string>();
             var collection = new QueryRouteCollection(typeof(string));
-            collection.AddRoute(null, MessageRoute<string>.CreateWithoutTopicFilter("type", (_, _, _, _) =>
+            collection.AddRoute(null, MessageRoute.CreateForEvent<string>("type", (_, _, _, _) =>
             {
                 calls.Add("no-topic");
                 return null;
             }));
-            collection.AddRoute("topic", MessageRoute<string>.CreateWithTopicFilter("type", "topic", (_, _, _, _) =>
+            collection.AddRoute("topic", MessageRoute.CreateForEvent<string>("type", "topic", (_, _, _, _) =>
             {
                 calls.Add("topic");
                 return null;
@@ -89,7 +89,7 @@ namespace CryptoExchange.Net.UnitTests.SocketRoutingTests
         {
             // arrange
             var collection = new QueryRouteCollection(typeof(string));
-            collection.AddRoute("other-topic", MessageRoute<string>.CreateWithTopicFilter("type", "other-topic", (_, _, _, _) => null));
+            collection.AddRoute("other-topic", MessageRoute.CreateForEvent<string>("type", "other-topic", (_, _, _, _) => null));
             collection.Build();
 
             // act
@@ -106,12 +106,12 @@ namespace CryptoExchange.Net.UnitTests.SocketRoutingTests
             // arrange
             var calls = new List<string>();
             var collection = new QueryRouteCollection(typeof(string));
-            collection.AddRoute(null, MessageRoute<string>.CreateWithoutTopicFilter("type", (_, _, _, _) =>
+            collection.AddRoute(null, MessageRoute.CreateForEvent<string>("type", (_, _, _, _) =>
             {
                 calls.Add("no-topic");
                 return null;
             }));
-            collection.AddRoute("topic", MessageRoute<string>.CreateWithTopicFilter("type", "topic", (_, _, _, _) =>
+            collection.AddRoute("topic", MessageRoute.CreateForEvent<string>("type", "topic", (_, _, _, _) =>
             {
                 calls.Add("topic");
                 return null;
@@ -132,17 +132,17 @@ namespace CryptoExchange.Net.UnitTests.SocketRoutingTests
         {
             // arrange
             var calls = new List<string>();
-            var expectedResult = CallResult.SuccessResult;
+            var expectedResult = CallResult.Ok();
             var collection = new QueryRouteCollection(typeof(string));
-            collection.AddRoute("topic", MessageRoute<string>.CreateWithTopicFilter("type", "topic", (_, _, _, _) =>
+            collection.AddRoute("topic", MessageRoute.CreateForEvent<string>("type", "topic", (_, _, _, _) =>
             {
                 calls.Add("first");
                 return expectedResult;
             }));
-            collection.AddRoute("topic", MessageRoute<string>.CreateWithTopicFilter("type", "topic", (_, _, _, _) =>
+            collection.AddRoute("topic", MessageRoute.CreateForEvent<string>("type", "topic", (_, _, _, _) =>
             {
                 calls.Add("second");
-                return new CallResult(null);
+                return CallResult.Ok();
             }));
             collection.Build();
 
@@ -160,17 +160,17 @@ namespace CryptoExchange.Net.UnitTests.SocketRoutingTests
         {
             // arrange
             var calls = new List<string>();
-            var expectedResult = CallResult.SuccessResult;
+            var expectedResult = CallResult.Ok();
             var collection = new QueryRouteCollection(typeof(string));
-            collection.AddRoute("topic", MessageRoute<string>.CreateWithTopicFilter("type", "topic", (_, _, _, _) =>
+            collection.AddRoute("topic", MessageRoute.CreateForEvent<string>("type", "topic", (_, _, _, _) =>
             {
                 calls.Add("first");
                 return expectedResult;
             }, true));
-            collection.AddRoute("topic", MessageRoute<string>.CreateWithTopicFilter("type", "topic", (_, _, _, _) =>
+            collection.AddRoute("topic", MessageRoute.CreateForEvent<string>("type", "topic", (_, _, _, _) =>
             {
                 calls.Add("second");
-                return new CallResult(null);
+                return CallResult.Ok();
             }));
             collection.Build();
 
@@ -188,22 +188,22 @@ namespace CryptoExchange.Net.UnitTests.SocketRoutingTests
         {
             // arrange
             var calls = new List<string>();
-            var expectedResult = CallResult.SuccessResult;
+            var expectedResult = CallResult.Ok();
             var collection = new QueryRouteCollection(typeof(string));
-            collection.AddRoute("topic", MessageRoute<string>.CreateWithTopicFilter("type", "topic", (_, _, _, _) =>
+            collection.AddRoute("topic", MessageRoute.CreateForEvent<string>("type", "topic", (_, _, _, _) =>
             {
                 calls.Add("first");
                 return null;
             }));
-            collection.AddRoute("topic", MessageRoute<string>.CreateWithTopicFilter("type", "topic", (_, _, _, _) =>
+            collection.AddRoute("topic", MessageRoute.CreateForEvent<string>("type", "topic", (_, _, _, _) =>
             {
                 calls.Add("second");
                 return expectedResult;
             }));
-            collection.AddRoute("topic", MessageRoute<string>.CreateWithTopicFilter("type", "topic", (_, _, _, _) =>
+            collection.AddRoute("topic", MessageRoute.CreateForEvent<string>("type", "topic", (_, _, _, _) =>
             {
                 calls.Add("third");
-                return new CallResult(null);
+                return CallResult.Ok();
             }));
             collection.Build();
 
@@ -221,7 +221,7 @@ namespace CryptoExchange.Net.UnitTests.SocketRoutingTests
         {
             // arrange
             var collection = new QueryRouteCollection(typeof(string));
-            collection.AddRoute("topic", MessageRoute<string>.CreateWithTopicFilter("type", "topic", (_, _, _, _) => null));
+            collection.AddRoute("topic", MessageRoute.CreateForEvent<string>("type", "topic", (_, _, _, _) => null));
             collection.Build();
 
             // act

CryptoExchange.Net.UnitTests/SocketRoutingTests/RoutingTableTests.cs

@@ -17,13 +17,13 @@ namespace CryptoExchange.Net.UnitTests.SocketRoutingTests
             var processor1 = new TestMessageProcessor(
                 1,
                 MessageRouter.Create(
-                    MessageRoute<string>.CreateWithoutTopicFilter("type1", (_, _, _, _) => null),
-                    MessageRoute<string>.CreateWithTopicFilter("type1", "topic1", (_, _, _, _) => null)));
+                    MessageRoute.CreateForEvent<string>("type1", (_, _, _, _) => null),
+                    MessageRoute.CreateForEvent<string>("type1", "topic1", (_, _, _, _) => null)));
 
             var processor2 = new TestMessageProcessor(
                 2,
                 MessageRouter.Create(
-                    MessageRoute<int>.CreateWithTopicFilter("type2", "topic2", (_, _, _, _) => null)));
+                    MessageRoute.CreateForEvent<int>("type2", "topic2", (_, _, _, _) => null)));
 
             var table = new RoutingTable();
 
@@ -57,12 +57,12 @@ namespace CryptoExchange.Net.UnitTests.SocketRoutingTests
             var processor1 = new TestMessageProcessor(
                 1,
                 MessageRouter.Create(
-                    MessageRoute<string>.CreateWithoutTopicFilter("type1", (_, _, _, _) => null)));
+                    MessageRoute.CreateForEvent<string>("type1", (_, _, _, _) => null)));
 
             var processor2 = new TestMessageProcessor(
                 2,
                 MessageRouter.Create(
-                    MessageRoute<string>.CreateWithTopicFilter("type1", "topic1", (_, _, _, _) => null)));
+                    MessageRoute.CreateForEvent<string>("type1", "topic1", (_, _, _, _) => null)));
 
             var table = new RoutingTable();
 
@@ -85,12 +85,12 @@ namespace CryptoExchange.Net.UnitTests.SocketRoutingTests
             var initialProcessor = new TestMessageProcessor(
                 1,
                 MessageRouter.Create(
-                    MessageRoute<string>.CreateWithoutTopicFilter("type1", (_, _, _, _) => null)));
+                    MessageRoute.CreateForEvent<string>("type1", (_, _, _, _) => null)));
 
             var replacementProcessor = new TestMessageProcessor(
                 2,
                 MessageRouter.Create(
-                    MessageRoute<int>.CreateWithoutTopicFilter("type2", (_, _, _, _) => null)));
+                    MessageRoute.CreateForEvent<int>("type2", (_, _, _, _) => null)));
 
             var table = new RoutingTable();
             table.Update(new IMessageProcessor[] { initialProcessor });
@@ -116,7 +116,7 @@ namespace CryptoExchange.Net.UnitTests.SocketRoutingTests
             var processor = new TestMessageProcessor(
                 1,
                 MessageRouter.Create(
-                    MessageRoute<string>.CreateWithoutTopicFilter("type1", (_, _, _, _) => null)));
+                    MessageRoute.CreateForEvent<string>("type1", (_, _, _, _) => null)));
 
             var table = new RoutingTable();
             table.Update(new IMessageProcessor[] { processor });
@@ -156,8 +156,9 @@ namespace CryptoExchange.Net.UnitTests.SocketRoutingTests
                 MessageRouter = messageRouter;
             }
 
+#pragma warning disable CS0067 // The event is never used, but it's required by the interface
             public event Action? OnMessageRouterUpdated;
-
+#pragma warning restore CS0067
             public bool Handle(string typeIdentifier, string? topicFilter, SocketConnection socketConnection, DateTime receiveTime, string? originalData, object result)
             {
                 return true;

CryptoExchange.Net.UnitTests/SocketRoutingTests/SubscriptionRouterTests.cs

@@ -15,9 +15,9 @@ namespace CryptoExchange.Net.UnitTests.SocketRoutingTests
             // arrange
             var routes = new MessageRoute[]
             {
-                MessageRoute<string>.CreateWithoutTopicFilter("type1", (_, _, _, _) => null),
-                MessageRoute<string>.CreateWithTopicFilter("type1", "topic1", (_, _, _, _) => null),
-                MessageRoute<int>.CreateWithTopicFilter("type2", "topic2", (_, _, _, _) => null)
+                MessageRoute.CreateForEvent<string>("type1", (_, _, _, _) => null),
+                MessageRoute.CreateForEvent<string>("type1", "topic1", (_, _, _, _) => null),
+                MessageRoute.CreateForEvent<int>("type2", "topic2", (_, _, _, _) => null)
             };
 
             var router = new SubscriptionRouter(routes);
@@ -44,12 +44,12 @@ namespace CryptoExchange.Net.UnitTests.SocketRoutingTests
             // arrange
             var calls = new List<string>();
             var collection = new SubscriptionRouteCollection(typeof(string));
-            collection.AddRoute(null, MessageRoute<string>.CreateWithoutTopicFilter("type", (_, _, _, _) =>
+            collection.AddRoute(null, MessageRoute.CreateForEvent<string>("type", (_, _, _, _) =>
             {
                 calls.Add("no-topic");
                 return null;
             }));
-            collection.AddRoute("topic", MessageRoute<string>.CreateWithTopicFilter("type", "topic", (_, _, _, _) =>
+            collection.AddRoute("topic", MessageRoute.CreateForEvent<string>("type", "topic", (_, _, _, _) =>
             {
                 calls.Add("topic");
                 return null;
@@ -61,7 +61,7 @@ namespace CryptoExchange.Net.UnitTests.SocketRoutingTests
 
             // assert
             Assert.That(handled, Is.True);
-            Assert.That(result, Is.SameAs(CallResult.SuccessResult));
+            Assert.That(result, Is.SameAs(CallResult.Ok()));
             Assert.That(calls, Is.EqualTo(new[] { "no-topic" }));
         }
 
@@ -70,7 +70,7 @@ namespace CryptoExchange.Net.UnitTests.SocketRoutingTests
         {
             // arrange
             var collection = new SubscriptionRouteCollection(typeof(string));
-            collection.AddRoute("other-topic", MessageRoute<string>.CreateWithTopicFilter("type", "other-topic", (_, _, _, _) => null));
+            collection.AddRoute("other-topic", MessageRoute.CreateForEvent<string>("type", "other-topic", (_, _, _, _) => null));
             collection.Build();
 
             // act
@@ -78,7 +78,7 @@ namespace CryptoExchange.Net.UnitTests.SocketRoutingTests
 
             // assert
             Assert.That(handled, Is.False);
-            Assert.That(result, Is.SameAs(CallResult.SuccessResult));
+            Assert.That(result, Is.SameAs(CallResult.Ok()));
         }
 
         [Test]
@@ -87,12 +87,12 @@ namespace CryptoExchange.Net.UnitTests.SocketRoutingTests
             // arrange
             var calls = new List<string>();
             var collection = new SubscriptionRouteCollection(typeof(string));
-            collection.AddRoute(null, MessageRoute<string>.CreateWithoutTopicFilter("type", (_, _, _, _) =>
+            collection.AddRoute(null, MessageRoute.CreateForEvent<string>("type", (_, _, _, _) =>
             {
                 calls.Add("no-topic");
                 return null;
             }));
-            collection.AddRoute("topic", MessageRoute<string>.CreateWithTopicFilter("type", "topic", (_, _, _, _) =>
+            collection.AddRoute("topic", MessageRoute.CreateForEvent<string>("type", "topic", (_, _, _, _) =>
             {
                 calls.Add("topic");
                 return null;
@@ -104,7 +104,7 @@ namespace CryptoExchange.Net.UnitTests.SocketRoutingTests
 
             // assert
             Assert.That(handled, Is.True);
-            Assert.That(result, Is.SameAs(CallResult.SuccessResult));
+            Assert.That(result, Is.SameAs(CallResult.Ok()));
             Assert.That(calls, Is.EqualTo(new[] { "no-topic", "topic" }));
         }
 
@@ -114,12 +114,12 @@ namespace CryptoExchange.Net.UnitTests.SocketRoutingTests
             // arrange
             var calls = new List<string>();
             var collection = new SubscriptionRouteCollection(typeof(string));
-            collection.AddRoute("topic", MessageRoute<string>.CreateWithTopicFilter("type", "topic", (_, _, _, _) =>
+            collection.AddRoute("topic", MessageRoute.CreateForEvent<string>("type", "topic", (_, _, _, _) =>
             {
                 calls.Add("first");
-                return CallResult.SuccessResult;
+                return CallResult.Ok();
             }));
-            collection.AddRoute("topic", MessageRoute<string>.CreateWithTopicFilter("type", "topic", (_, _, _, _) =>
+            collection.AddRoute("topic", MessageRoute.CreateForEvent<string>("type", "topic", (_, _, _, _) =>
             {
                 calls.Add("second");
                 return null;
@@ -131,7 +131,7 @@ namespace CryptoExchange.Net.UnitTests.SocketRoutingTests
 
             // assert
             Assert.That(handled, Is.True);
-            Assert.That(result, Is.SameAs(CallResult.SuccessResult));
+            Assert.That(result, Is.SameAs(CallResult.Ok()));
             Assert.That(calls, Is.EqualTo(new[] { "first", "second" }));
         }
 
@@ -141,7 +141,7 @@ namespace CryptoExchange.Net.UnitTests.SocketRoutingTests
             // arrange
             var calls = new List<string>();
             var collection = new SubscriptionRouteCollection(typeof(string));
-            collection.AddRoute("topic", MessageRoute<string>.CreateWithTopicFilter("type", "topic", (_, _, _, _) =>
+            collection.AddRoute("topic", MessageRoute.CreateForEvent<string>("type", "topic", (_, _, _, _) =>
             {
                 calls.Add("topic");
                 return null;
@@ -153,7 +153,7 @@ namespace CryptoExchange.Net.UnitTests.SocketRoutingTests
 
             // assert
             Assert.That(handled, Is.False);
-            Assert.That(result, Is.SameAs(CallResult.SuccessResult));
+            Assert.That(result, Is.SameAs(CallResult.Ok()));
             Assert.That(calls, Is.Empty);
         }
     }

CryptoExchange.Net.UnitTests/SocketRoutingTests/SubscriptionTests.cs

@@ -0,0 +1,130 @@
+using CryptoExchange.Net.Objects;
+using CryptoExchange.Net.Sockets;
+using CryptoExchange.Net.Sockets.Default;
+using CryptoExchange.Net.Sockets.Default.Routing;
+using CryptoExchange.Net.UnitTests.Implementations;
+using Microsoft.Extensions.Logging.Abstractions;
+using NUnit.Framework;
+using System;
+
+namespace CryptoExchange.Net.UnitTests.SocketRoutingTests
+{
+    [TestFixture]
+    public class SubscriptionTests
+    {
+        [Test]
+        public void Handle_Should_OnlyCompleteSubscriptionQuery_ForMatchingTopic()
+        {
+            // arrange
+            var topicASubscription = new TopicSubscription("topic-a");
+            var topicBSubscription = new TopicSubscription("topic-b");
+            var topicAQuery = topicASubscription.CreateSubscriptionQuery(null!)!;
+            var topicBQuery = topicBSubscription.CreateSubscriptionQuery(null!)!;
+
+            // act
+            var topicAHandled = topicASubscription.Handle("type", "topic-a", null!, DateTime.UtcNow, "original", "data");
+            var topicBHandled = topicBSubscription.Handle("type", "topic-a", null!, DateTime.UtcNow, "original", "data");
+
+            // assert
+            Assert.That(topicAHandled, Is.True);
+            Assert.That(topicBHandled, Is.False);
+            Assert.That(topicAQuery.Completed, Is.True);
+            Assert.That(topicAQuery.Success, Is.True);
+            Assert.That(topicBQuery.Completed, Is.False);
+        }
+
+        [Test]
+        public void Handle_Should_CompleteSubscriptionQuery_BeforeInvokingMatchingHandler()
+        {
+            // arrange
+            Query? query = null;
+            var queryCompletedWhenHandlerInvoked = false;
+            var subscription = new TopicSubscription("topic", () => queryCompletedWhenHandlerInvoked = query!.Completed);
+            query = subscription.CreateSubscriptionQuery(null!)!;
+
+            // act
+            subscription.Handle("type", "topic", null!, DateTime.UtcNow, "original", "data");
+
+            // assert
+            Assert.That(queryCompletedWhenHandlerInvoked, Is.True);
+        }
+
+        [TestCase(null)]
+        [TestCase("topic")]
+        public void Handle_Should_CompleteSubscriptionQuery_ForUnfilteredRoute(string? topicFilter)
+        {
+            // arrange
+            var subscription = new TopicSubscription(topic: null);
+            var query = subscription.CreateSubscriptionQuery(null!)!;
+
+            // act
+            var handled = subscription.Handle("type", topicFilter, null!, DateTime.UtcNow, "original", "data");
+
+            // assert
+            Assert.That(handled, Is.True);
+            Assert.That(query.Completed, Is.True);
+            Assert.That(query.Success, Is.True);
+        }
+
+        [Test]
+        public void Handle_Should_TreatEmptyTopicFilterAsUnfilteredRoute()
+        {
+            // arrange
+            var subscription = new TopicSubscription(string.Empty);
+            var query = subscription.CreateSubscriptionQuery(null!)!;
+
+            // act
+            var handled = subscription.Handle("type", "topic", null!, DateTime.UtcNow, "original", "data");
+
+            // assert
+            Assert.That(handled, Is.True);
+            Assert.That(query.Completed, Is.True);
+            Assert.That(query.Success, Is.True);
+        }
+
+        [Test]
+        public void Handle_Should_CompleteSubscriptionQuery_ForAnyMatchingTopic()
+        {
+            // arrange
+            var subscription = new TopicSubscription(["topic-a", "topic-b"]);
+            var query = subscription.CreateSubscriptionQuery(null!)!;
+
+            // act
+            var handled = subscription.Handle("type", "topic-b", null!, DateTime.UtcNow, "original", "data");
+
+            // assert
+            Assert.That(handled, Is.True);
+            Assert.That(query.Completed, Is.True);
+            Assert.That(query.Success, Is.True);
+        }
+
+        private sealed class TopicSubscription : Subscription
+        {
+            public TopicSubscription(string? topic, Action? handler = null)
+                : base(NullLogger.Instance, false)
+            {
+                MessageRouter = MessageRouter.CreateForEvent<string>("type", topic, (_, _, _, _) =>
+                {
+                    handler?.Invoke();
+                    return CallResult.Ok();
+                });
+            }
+
+            public TopicSubscription(string[] topics)
+                : base(NullLogger.Instance, false)
+            {
+                MessageRouter = MessageRouter.CreateForEvent<string>("type", topics, (_, _, _, _) => CallResult.Ok());
+            }
+
+            protected override Query? GetSubQuery(SocketConnection connection)
+            {
+                return new TestQuery(new TestSocketMessage { Id = 1, Data = "Sub" }, false)
+                {
+                    TimeoutBehavior = TimeoutBehavior.Succeed
+                };
+            }
+
+            protected override Query? GetUnsubQuery(SocketConnection connection) => null;
+        }
+    }
+}

CryptoExchange.Net.UnitTests/SymbolOrderBookTests.cs

@@ -25,7 +25,7 @@ namespace CryptoExchange.Net.UnitTests
             }
 
 
-            protected override Task<CallResult<bool>> DoResyncAsync(CancellationToken ct)
+            protected override Task<CallResult> DoResyncAsync(CancellationToken ct)
             {
                 throw new NotImplementedException();
             }

CryptoExchange.Net.UnitTests/TokenManagementTests.cs

@@ -0,0 +1,347 @@
+using CryptoExchange.Net.Objects;
+using CryptoExchange.Net.Objects.Errors;
+using CryptoExchange.Net.Sockets;
+using CryptoExchange.Net.Sockets.Default;
+using CryptoExchange.Net.TokenManagement;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Logging.Abstractions;
+using NUnit.Framework;
+using System;
+using System.Threading.Tasks;
+
+namespace CryptoExchange.Net.UnitTests
+{
+    [TestFixture]
+    public class TokenManagementTests
+    {
+        private static readonly TimeSpan TestMaintenanceInterval = TimeSpan.FromMilliseconds(5);
+
+        [Test]
+        public async Task AcquireWithoutApiKeyReturnsCredentialsError()
+        {
+            var starts = 0;
+            var manager = CreateManager(
+                (_, _) =>
+                {
+                    starts++;
+                    return Task.FromResult(CallResult.Ok("token"));
+                });
+
+            var result = await manager.AcquireAsync(new TokenScope("Test", "Test", "Test", ""));
+
+            Assert.That(result.Success, Is.False);
+            Assert.That(result.Error, Is.TypeOf<NoApiCredentialsError>());
+            Assert.That(starts, Is.EqualTo(0));
+        }
+
+        [Test]
+        public async Task StartTokenFailureIsReturned()
+        {
+            var error = new ServerError(ErrorType.Unknown, "start failed");
+            var manager = CreateManager((_, _) => Task.FromResult(CallResult.Fail<string>(error)));
+
+            var result = await manager.AcquireAsync(CreateScope());
+
+            Assert.That(result.Success, Is.False);
+            Assert.That(result.Error, Is.SameAs(error));
+        }
+
+        [Test]
+        public async Task ActiveTokenIsSharedWhileLeasedAndStoppedAfterLastRelease()
+        {
+            var starts = 0;
+            var stops = 0;
+            var manager = CreateManager(
+                (_, _) => Task.FromResult(CallResult.Ok("token-" + ++starts)),
+                stopToken: (_, _) =>
+                {
+                    stops++;
+                    return Task.FromResult(CallResult.Ok());
+                });
+            var scope = CreateScope();
+
+            var first = await manager.AcquireAsync(scope);
+            var second = await manager.AcquireAsync(scope);
+            AssertSuccess(first);
+            AssertSuccess(second);
+
+            Assert.That(second.Data!.Token.Token, Is.EqualTo(first.Data!.Token.Token));
+            Assert.That(starts, Is.EqualTo(1));
+
+            await first.Data!.ReleaseAsync();
+            Assert.That(stops, Is.EqualTo(0));
+
+            await second.Data!.ReleaseAsync();
+            Assert.That(stops, Is.EqualTo(1));
+        }
+
+        [Test]
+        public async Task ActiveTokenStartsNewTokenAfterLeaseRelease()
+        {
+            var starts = 0;
+            var stops = 0;
+            var manager = CreateManager(
+                (_, _) => Task.FromResult(CallResult.Ok("token-" + ++starts)),
+                stopToken: (_, _) =>
+                {
+                    stops++;
+                    return Task.FromResult(CallResult.Ok());
+                });
+            var scope = CreateScope();
+
+            var first = await manager.AcquireAsync(scope);
+            AssertSuccess(first);
+            await first.Data!.ReleaseAsync();
+            var second = await manager.AcquireAsync(scope);
+            AssertSuccess(second);
+
+            Assert.That(second.Data!.Token.Token, Is.Not.EqualTo(first.Data!.Token.Token));
+            Assert.That(starts, Is.EqualTo(2));
+            Assert.That(stops, Is.EqualTo(1));
+            await second.Data!.ReleaseAsync();
+        }
+
+        [Test]
+        public async Task ReleasingLeaseTwiceOnlyStopsActiveTokenOnce()
+        {
+            var stops = 0;
+            var manager = CreateManager(
+                (_, _) => Task.FromResult(CallResult.Ok("token")),
+                stopToken: (_, _) =>
+                {
+                    stops++;
+                    return Task.FromResult(CallResult.Ok());
+                });
+
+            var leaseResult = await manager.AcquireAsync(CreateScope());
+            AssertSuccess(leaseResult);
+
+            await leaseResult.Data!.ReleaseAsync();
+            await leaseResult.Data!.ReleaseAsync();
+
+            Assert.That(stops, Is.EqualTo(1));
+        }
+
+        [Test]
+        public async Task CachedTokenIsReusedAfterLeaseRelease()
+        {
+            var starts = 0;
+            var manager = CreateManager(
+                (_, _) => Task.FromResult(CallResult.Ok("token-" + ++starts)),
+                managementType: TokenManagementType.Cached);
+            var scope = CreateScope();
+
+            var first = await manager.AcquireAsync(scope);
+            AssertSuccess(first);
+            await first.Data!.ReleaseAsync();
+            var second = await manager.AcquireAsync(scope);
+            AssertSuccess(second);
+
+            Assert.That(second.Data!.Token.Token, Is.EqualTo(first.Data!.Token.Token));
+            Assert.That(starts, Is.EqualTo(1));
+            await second.Data!.ReleaseAsync();
+        }
+
+        [Test]
+        public async Task CachedTokensAreScopedIndependently()
+        {
+            var starts = 0;
+            var manager = CreateManager(
+                (_, _) => Task.FromResult(CallResult.Ok("token-" + ++starts)),
+                managementType: TokenManagementType.Cached);
+
+            var firstScope = CreateScope(additionalIdentifier: "one");
+            var secondScope = CreateScope(additionalIdentifier: "two");
+
+            var first = await manager.AcquireAsync(firstScope);
+            var second = await manager.AcquireAsync(secondScope);
+            AssertSuccess(first);
+            AssertSuccess(second);
+            await first.Data!.ReleaseAsync();
+            await second.Data!.ReleaseAsync();
+
+            var firstAgain = await manager.AcquireAsync(firstScope);
+            AssertSuccess(firstAgain);
+
+            Assert.That(firstAgain.Data!.Token.Token, Is.EqualTo(first.Data!.Token.Token));
+            Assert.That(second.Data!.Token.Token, Is.Not.EqualTo(first.Data!.Token.Token));
+            Assert.That(starts, Is.EqualTo(2));
+            await firstAgain.Data!.ReleaseAsync();
+        }
+
+        [Test]
+        public async Task ExpiredCachedTokenIsNotReused()
+        {
+            var starts = 0;
+            var manager = CreateManager(
+                (_, _) => Task.FromResult(CallResult.Ok("token-" + ++starts)),
+                timeValid: TimeSpan.FromMilliseconds(20),
+                managementType: TokenManagementType.Cached);
+            var scope = CreateScope();
+
+            var first = await manager.AcquireAsync(scope);
+            AssertSuccess(first);
+            await first.Data!.ReleaseAsync();
+            await Task.Delay(50);
+            var second = await manager.AcquireAsync(scope);
+            AssertSuccess(second);
+
+            Assert.That(first.Data!.Token.Status, Is.EqualTo(TokenStatus.Expired));
+            Assert.That(second.Data!.Token.Token, Is.Not.EqualTo(first.Data!.Token.Token));
+            Assert.That(starts, Is.EqualTo(2));
+            await second.Data!.ReleaseAsync();
+        }
+
+        [Test]
+        public async Task CachedTokenDoesNotRunKeepAliveLoop()
+        {
+            var keepAlives = 0;
+            var manager = CreateManager(
+                (_, _) => Task.FromResult(CallResult.Ok("token")),
+                refreshInterval: TimeSpan.FromMilliseconds(1),
+                keepAliveToken: (_, _) =>
+                {
+                    keepAlives++;
+                    return Task.FromResult(CallResult.Ok());
+                },
+                managementType: TokenManagementType.Cached);
+
+            var leaseResult = await manager.AcquireAsync(CreateScope());
+            AssertSuccess(leaseResult);
+            await Task.Delay(50);
+
+            Assert.That(keepAlives, Is.EqualTo(0));
+            await leaseResult.Data!.ReleaseAsync();
+        }
+
+        [Test]
+        public async Task ActiveTokenKeepAliveRefreshesValidity()
+        {
+            var keepAlives = 0;
+            var manager = CreateManager(
+                (_, _) => Task.FromResult(CallResult.Ok("token")),
+                refreshInterval: TimeSpan.FromMilliseconds(1),
+                timeValid: TimeSpan.FromSeconds(1),
+                keepAliveToken: (_, _) =>
+                {
+                    keepAlives++;
+                    return Task.FromResult(CallResult.Ok());
+                });
+
+            var leaseResult = await manager.AcquireAsync(CreateScope());
+            AssertSuccess(leaseResult);
+            var originalValidUntil = leaseResult.Data!.Token.ValidUntil;
+
+            await WaitUntilAsync(() => keepAlives > 0);
+
+            Assert.That(leaseResult.Data!.Token.ValidUntil, Is.GreaterThan(originalValidUntil));
+            await leaseResult.Data!.ReleaseAsync();
+        }
+
+        [Test]
+        public async Task ActiveTokenKeepAliveFailureExpiresTokenWhenValidityPassed()
+        {
+            var starts = 0;
+            var expired = false;
+            var manager = CreateManager(
+                (_, _) => Task.FromResult(CallResult.Ok("token-" + ++starts)),
+                refreshInterval: TimeSpan.FromMilliseconds(1),
+                timeValid: TimeSpan.FromMilliseconds(25),
+                keepAliveToken: (_, _) => Task.FromResult(CallResult.Fail(new ServerError(ErrorType.Unknown, "keep alive failed"))));
+
+            var leaseResult = await manager.AcquireAsync(CreateScope());
+            AssertSuccess(leaseResult);
+            leaseResult.Data!.Token.Expired += _ => expired = true;
+
+            await WaitUntilAsync(() => expired);
+
+            Assert.That(leaseResult.Data!.Token.Status, Is.EqualTo(TokenStatus.Expired));
+
+            var nextLease = await manager.AcquireAsync(CreateScope());
+            AssertSuccess(nextLease);
+            Assert.That(nextLease.Data!.Token.Token, Is.Not.EqualTo(leaseResult.Data!.Token.Token));
+            Assert.That(starts, Is.EqualTo(2));
+
+            await leaseResult.Data!.ReleaseAsync();
+            await nextLease.Data!.ReleaseAsync();
+        }
+
+        [Test]
+        public async Task AcquireAndReplaceReleasesPreviousSubscriptionLease()
+        {
+            var starts = 0;
+            var stops = 0;
+            var manager = CreateManager(
+                (_, _) => Task.FromResult(CallResult.Ok("token-" + ++starts)),
+                stopToken: (_, _) =>
+                {
+                    stops++;
+                    return Task.FromResult(CallResult.Ok());
+                });
+            var subscription = new TestSubscription();
+
+            var first = await manager.AcquireAndReplaceAsync(subscription, CreateScope(additionalIdentifier: "one"));
+            AssertSuccess(first);
+            var second = await manager.AcquireAndReplaceAsync(subscription, CreateScope(additionalIdentifier: "two"));
+            AssertSuccess(second);
+
+            Assert.That(subscription.TokenLease, Is.SameAs(second.Data));
+            Assert.That(second.Data!.Token.Token, Is.Not.EqualTo(first.Data!.Token.Token));
+            Assert.That(stops, Is.EqualTo(1));
+
+            await subscription.TokenLease!.ReleaseAsync();
+        }
+
+        private static TokenManager CreateManager(
+            Func<TokenScope, System.Threading.CancellationToken, Task<CallResult<string>>> startToken,
+            TimeSpan? refreshInterval = null,
+            TimeSpan? timeValid = null,
+            Func<TokenInfo, System.Threading.CancellationToken, Task<CallResult>>? keepAliveToken = null,
+            Func<TokenInfo, System.Threading.CancellationToken, Task<CallResult>>? stopToken = null,
+            TokenManagementType managementType = TokenManagementType.Active)
+        {
+            return new TokenManager(
+                Guid.NewGuid().ToString(),
+                null,
+                refreshInterval ?? TimeSpan.FromMinutes(1),
+                timeValid ?? TimeSpan.FromMinutes(1),
+                startToken,
+                keepAliveToken,
+                stopToken,
+                managementType,
+                TestMaintenanceInterval);
+        }
+
+        private static TokenScope CreateScope(string apiKey = "apiKey", string? additionalIdentifier = null)
+            => new TokenScope("Test", "Test", "Test", apiKey, additionalIdentifier);
+
+        private static void AssertSuccess(CallResult<TokenLease> result)
+        {
+            Assert.That(result.Success, Is.True, result.Error?.ToString());
+            Assert.That(result.Data, Is.Not.Null);
+        }
+
+        private static async Task WaitUntilAsync(Func<bool> condition)
+        {
+            var timeout = DateTime.UtcNow.AddSeconds(2);
+            while (!condition())
+            {
+                if (DateTime.UtcNow > timeout)
+                    Assert.Fail("Condition was not met within the timeout");
+
+                await Task.Delay(10);
+            }
+        }
+
+        private sealed class TestSubscription : Subscription
+        {
+            public TestSubscription() : base(NullLogger.Instance, true)
+            {
+            }
+
+            protected override Query? GetSubQuery(SocketConnection connection) => null;
+
+            protected override Query? GetUnsubQuery(SocketConnection connection) => null;
+        }
+    }
+}

CryptoExchange.Net.sln

@@ -15,8 +15,6 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ConsoleClient", "Examples\C
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SharedClients", "Examples\SharedClients\SharedClients.csproj", "{988A87EF-EAEA-4313-A6CF-FA869813D5AB}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CryptoExchange.Net.Protobuf", "CryptoExchange.Net.Protobuf\CryptoExchange.Net.Protobuf.csproj", "{CC6A807A-9183-6F41-8EF1-8A70172B0E83}"
-EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -43,10 +41,6 @@ Global
 		{988A87EF-EAEA-4313-A6CF-FA869813D5AB}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{988A87EF-EAEA-4313-A6CF-FA869813D5AB}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{988A87EF-EAEA-4313-A6CF-FA869813D5AB}.Release|Any CPU.Build.0 = Release|Any CPU
-		{CC6A807A-9183-6F41-8EF1-8A70172B0E83}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{CC6A807A-9183-6F41-8EF1-8A70172B0E83}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{CC6A807A-9183-6F41-8EF1-8A70172B0E83}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{CC6A807A-9183-6F41-8EF1-8A70172B0E83}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

CryptoExchange.Net/Attributes/NullableAttributes.cs

@@ -1,7 +1,7 @@
-#if NETSTANDARD2_0
-namespace System.Diagnostics.CodeAnalysis
+namespace System.Diagnostics.CodeAnalysis
 {
     using System;
+#if NETSTANDARD2_0
 
     /// <summary>
     ///     Specifies that <see langword="null"/> is allowed as an input even if the
@@ -206,5 +206,26 @@ namespace System.Diagnostics.CodeAnalysis
             ReturnValue = returnValue;
         }
     }
+#endif
+#if NETSTANDARD2_0 || NETSTANDARD2_1
+    [AttributeUsage(AttributeTargets.Method | AttributeTargets.Property, AllowMultiple = true, Inherited = false)]
+    [ExcludeFromCodeCoverage]
+    internal sealed class MemberNotNullWhenAttribute : Attribute
+    {
+        public MemberNotNullWhenAttribute(bool returnValue, string member)
+        {
+            ReturnValue = returnValue;
+            Members = [member];
+        }
+
+        public MemberNotNullWhenAttribute(bool returnValue, params string[] members)
+        {
+            ReturnValue = returnValue;
+            Members = members;
+        }
+
+        public bool ReturnValue { get; }
+        public string[] Members { get; }
+    }
+#endif
 }
-#endif

CryptoExchange.Net/Authentication/AuthenticationProvider.cs

@@ -439,13 +439,13 @@ namespace CryptoExchange.Net.Authentication
         /// <param name="serializer"></param>
         /// <param name="parameters"></param>
         /// <returns></returns>
-        protected static string GetSerializedBody(IMessageSerializer serializer, IDictionary<string, object> parameters)
+        protected static string GetSerializedBody(IMessageSerializer serializer, Parameters? parameters)
         {
             if (serializer is not IStringMessageSerializer stringSerializer)
                 throw new InvalidOperationException("Non-string message serializer can't get serialized request body");
 
-            if (parameters?.Count == 1 && parameters.TryGetValue(Constants.BodyPlaceHolderKey, out object? value))
-                return stringSerializer.Serialize(value);
+            if (parameters?.BodyValue != null)
+                return stringSerializer.Serialize(parameters.BodyValue);
             else
                 return stringSerializer.Serialize(parameters);
         }

CryptoExchange.Net/Clients/BaseApiClient.cs

@@ -1,9 +1,13 @@
-using System;
 using CryptoExchange.Net.Interfaces.Clients;
 using CryptoExchange.Net.Objects.Errors;
 using CryptoExchange.Net.Objects.Options;
+using CryptoExchange.Net.RateLimiting;
 using CryptoExchange.Net.SharedApis;
 using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Logging.Abstractions;
+using System;
+using System.Threading;
+using System.Threading.Tasks;
 
 namespace CryptoExchange.Net.Clients
 {
@@ -25,7 +29,7 @@ namespace CryptoExchange.Net.Clients
         /// <summary>
         /// If we are disposing
         /// </summary>
-        protected bool _disposing;
+        protected bool _disposed;
 
         /// <summary>
         /// Whether a proxy is configured
@@ -47,6 +51,11 @@ namespace CryptoExchange.Net.Clients
             }
         }
 
+        /// <summary>
+        /// The name of the exchange this client is for
+        /// </summary>
+        public string Exchange { get; }
+
         /// <summary>
         /// The environment this client communicates to
         /// </summary>
@@ -72,23 +81,34 @@ namespace CryptoExchange.Net.Clients
         /// </summary>
         protected internal virtual ErrorMapping ErrorMapping { get; } = new ErrorMapping([]);
 
+        /// <summary>
+        /// Current rate limit admission override
+        /// </summary>
+        protected readonly AsyncLocal<RateLimitAdmission?> AdmissionOverride = new();
+
         /// <summary>
         /// ctor
         /// </summary>
-        /// <param name="logger">Logger</param>
+        /// <param name="loggerFactory">Logger factory</param>
+        /// <param name="exchange">The exchange name</param>
         /// <param name="outputOriginalData">Should data from this client include the original data in the call result</param>
         /// <param name="baseAddress">Base address for this API client</param>
         /// <param name="clientOptions">Client options</param>
         /// <param name="apiOptions">Api options</param>
         protected BaseApiClient(
-            ILogger logger,
+            ILoggerFactory? loggerFactory,
+            string exchange,
             bool outputOriginalData,
             string baseAddress,
             ExchangeOptions clientOptions,
             ApiOptions apiOptions)
         {
-            _logger = logger;
+            var loggerName = ClientName.StartsWith(exchange, StringComparison.OrdinalIgnoreCase)
+                 ? exchange + "." + ClientName.Substring(exchange.Length).TrimStart('.')
+                 : exchange + "." + ClientName;
+            _logger = loggerFactory?.CreateLogger(loggerName) ?? NullLogger.Instance;
 
+            Exchange = exchange;
             ClientOptions = clientOptions;
             ApiOptions = apiOptions;
             OutputOriginalData = outputOriginalData;
@@ -110,12 +130,44 @@ namespace CryptoExchange.Net.Clients
         /// </summary>
         public ErrorInfo GetErrorInfo(string code, string? message = null) => ErrorMapping.GetErrorInfo(code.ToString(), message);
 
+        /// <inheritdoc />
+        public async Task<TResult> WithRateLimitAdmissionAsync<TResult>(
+            RateLimitAdmission admission,
+            Func<Task<TResult>> operation)
+        {
+            if (admission == null)
+                throw new ArgumentNullException(nameof(admission));
+            if (operation == null)
+                throw new ArgumentNullException(nameof(operation));
+
+            var previous = AdmissionOverride.Value;
+            AdmissionOverride.Value = admission;
+
+            try
+            {
+                return await operation().ConfigureAwait(false);
+            }
+            finally
+            {
+                AdmissionOverride.Value = previous;
+            }
+        }
+
         /// <summary>
         /// Dispose
         /// </summary>
-        public virtual void Dispose()
+        public void Dispose()
         {
-            _disposing = true;
+            Dispose(true);
+            GC.SuppressFinalize(this);
+        }
+
+        /// <summary>
+        /// Dispose
+        /// </summary>
+        protected virtual void Dispose(bool disposing)
+        {
+            _disposed = true;
         }
     }
 }

CryptoExchange.Net/Clients/BaseClient.cs

@@ -1,6 +1,7 @@
 using CryptoExchange.Net.Authentication;
 using CryptoExchange.Net.Objects.Options;
 using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
 using System;
 using System.Collections.Generic;
 using System.Threading;
@@ -89,7 +90,6 @@ namespace CryptoExchange.Net.Clients
                 throw new ArgumentNullException(nameof(options));
 
             ClientOptions = options;
-            _logger.Log(LogLevel.Trace, $"Client configuration: {options}, CryptoExchange.Net: v{CryptoExchangeLibVersion}, {Exchange}.Net: v{ExchangeLibVersion}");
         }
 
         /// <summary>
@@ -115,6 +115,12 @@ namespace CryptoExchange.Net.Clients
             return opts;
         }
 
+        /// <inheritdoc />
+        public override string ToString() 
+        {
+            return $"{GetType().Name}, CryptoExchange.Net: v{CryptoExchangeLibVersion}, {Exchange}.Net: v{ExchangeLibVersion}, configuration: {ClientOptions}";
+        }
+
         /// <summary>
         /// Dispose
         /// </summary>

CryptoExchange.Net/Clients/BaseRestClient.cs

@@ -72,7 +72,7 @@ namespace CryptoExchange.Net.Clients
         /// Set the API credentials for this client. All Api clients in this client will use the new credentials, regardless of earlier set options.
         /// </summary>
         /// <param name="credentials">The credentials to set</param>
-        public void SetApiCredentials(TApiCredentials credentials)
+        public virtual void SetApiCredentials(TApiCredentials credentials)
         {
             foreach (var apiClient in ApiClients)
                 apiClient.SetApiCredentials(credentials);

CryptoExchange.Net/Clients/RestApiClient.cs

@@ -41,11 +41,6 @@ namespace CryptoExchange.Net.Clients
         /// </summary>
         protected internal RequestBodyFormat RequestBodyFormat = RequestBodyFormat.Json;
 
-        /// <summary>
-        /// How to serialize array parameters when making requests
-        /// </summary>
-        protected internal ArrayParametersSerialization ArraySerialization = ArrayParametersSerialization.Array;
-
         /// <summary>
         /// What request body should be set when no data is send (only used in combination with postParametersPosition.InBody)
         /// </summary>
@@ -56,16 +51,6 @@ namespace CryptoExchange.Net.Clients
         /// </summary>
         protected Dictionary<string, string> StandardRequestHeaders { get; set; } = [];
 
-        /// <summary>
-        /// Whether parameters need to be ordered
-        /// </summary>
-        protected internal bool OrderParameters { get; set; } = true;
-
-        /// <summary>
-        /// Parameter order comparer
-        /// </summary>
-        protected IComparer<string> ParameterOrderComparer { get; } = new OrderedStringComparer();
-
         /// <summary>
         /// Where to put the parameters for requests with different Http methods
         /// </summary>
@@ -108,26 +93,33 @@ namespace CryptoExchange.Net.Clients
         /// Get the AuthenticationProvider implementation, or null if no ApiCredentials are set
         /// </summary>
         public virtual AuthenticationProvider? GetAuthenticationProvider() => null;
-        
+
         /// <summary>
         /// Configured environment name
         /// </summary>
         public abstract string EnvironmentName { get; }
+        /// <summary>
+        /// Request coalescer
+        /// </summary>
+        protected RequestCoalescer RequestCoalescer { get; }
 
         /// <summary>
         /// ctor
         /// </summary>
-        /// <param name="logger">Logger</param>
+        /// <param name="loggerFactory">Logger factory</param>
+        /// <param name="exchangeName">The exchange name</param>
         /// <param name="httpClient">HttpClient to use</param>
         /// <param name="baseAddress">Base address for this API client</param>
         /// <param name="options">The base client options</param>
         /// <param name="apiOptions">The Api client options</param>
-        public RestApiClient(ILogger logger,
+        public RestApiClient(ILoggerFactory? loggerFactory,
+            string exchangeName,
             HttpClient? httpClient,
             string baseAddress,
             RestExchangeOptions options,
             RestApiOptions apiOptions)
-            : base(logger,
+            : base(loggerFactory,
+                  exchangeName,
                   apiOptions.OutputOriginalData ?? options.OutputOriginalData,
                   baseAddress,
                   options,
@@ -135,6 +127,7 @@ namespace CryptoExchange.Net.Clients
         {
             TimeOffsetManager.RegisterRestApi(ClientName);
 
+            RequestCoalescer = new RequestCoalescer(_logger);
             RequestFactory.Configure(options, httpClient);
         }
 
@@ -144,33 +137,10 @@ namespace CryptoExchange.Net.Clients
         /// <returns></returns>
         protected abstract IMessageSerializer CreateSerializer();
 
-        /// <summary>
-        /// Send a request to the base address based on the request definition
-        /// </summary>
-        /// <param name="baseAddress">Host and schema</param>
-        /// <param name="definition">Request definition</param>
-        /// <param name="parameters">Request parameters</param>
-        /// <param name="cancellationToken">Cancellation token</param>
-        /// <param name="additionalHeaders">Additional headers for this request</param>
-        /// <param name="weight">Override the request weight for this request definition, for example when the weight depends on the parameters</param>
-        /// <returns></returns>
-        protected virtual async Task<WebCallResult> SendAsync(
-            string baseAddress,
-            RequestDefinition definition,
-            ParameterCollection? parameters,
-            CancellationToken cancellationToken,
-            Dictionary<string, string>? additionalHeaders = null,
-            int? weight = null)
-        { 
-            var result = await SendAsync<object>(baseAddress, definition, parameters, cancellationToken, additionalHeaders, weight).ConfigureAwait(false);
-            return result.AsDataless();
-        }
-
         /// <summary>
         /// Send a request to the base address based on the request definition
         /// </summary>
         /// <typeparam name="T">Response type</typeparam>
-        /// <param name="baseAddress">Host and schema</param>
         /// <param name="definition">Request definition</param>
         /// <param name="parameters">Request parameters</param>
         /// <param name="cancellationToken">Cancellation token</param>
@@ -179,10 +149,9 @@ namespace CryptoExchange.Net.Clients
         /// <param name="weightSingleLimiter">Specify the weight to apply to the individual rate limit guard for this request</param>
         /// <param name="rateLimitKeySuffix">An additional optional suffix for the key selector. Can be used to make rate limiting work based on parameters.</param>
         /// <returns></returns>
-        protected virtual Task<WebCallResult<T>> SendAsync<T>(
-            string baseAddress,
+        protected virtual Task<HttpResult<T>> SendAsync<T>(
             RequestDefinition definition,
-            ParameterCollection? parameters,
+            Parameters? parameters,
             CancellationToken cancellationToken,
             Dictionary<string, string>? additionalHeaders = null,
             int? weight = null,
@@ -191,7 +160,6 @@ namespace CryptoExchange.Net.Clients
         {
             var parameterPosition = definition.ParameterPosition ?? ParameterPositions[definition.Method];
             return SendAsync<T>(
-                baseAddress,
                 definition,
                 parameterPosition == HttpMethodParameterPosition.InUri ? parameters : null,
                 parameterPosition == HttpMethodParameterPosition.InBody ? parameters : null,
@@ -206,7 +174,6 @@ namespace CryptoExchange.Net.Clients
         /// Send a request to the base address based on the request definition
         /// </summary>
         /// <typeparam name="T">Response type</typeparam>
-        /// <param name="baseAddress">Host and schema</param>
         /// <param name="definition">Request definition</param>
         /// <param name="uriParameters">Request query parameters</param>
         /// <param name="bodyParameters">Request body parameters</param>
@@ -215,12 +182,65 @@ namespace CryptoExchange.Net.Clients
         /// <param name="weight">Override the request weight for this request definition, for example when the weight depends on the parameters</param>
         /// <param name="weightSingleLimiter">Specify the weight to apply to the individual rate limit guard for this request</param>
         /// <param name="rateLimitKeySuffix">An additional optional suffix for the key selector. Can be used to make rate limiting work based on parameters.</param>
-        /// <returns></returns>
-        protected virtual async Task<WebCallResult<T>> SendAsync<T>(
-            string baseAddress,
+        protected virtual Task<HttpResult<T>> SendAsync<T>(
             RequestDefinition definition,
-            ParameterCollection? uriParameters,
-            ParameterCollection? bodyParameters,
+            Parameters? uriParameters,
+            Parameters? bodyParameters,
+            CancellationToken cancellationToken,
+            Dictionary<string, string>? additionalHeaders = null,
+            int? weight = null,
+            int? weightSingleLimiter = null,
+            string? rateLimitKeySuffix = null)
+        {
+            if (!ShouldCoalesce(definition, additionalHeaders))
+            {
+                return SendCoreAsync<T>(
+                    definition,
+                    uriParameters,
+                    bodyParameters,
+                    cancellationToken,
+                    additionalHeaders,
+                    weight,
+                    weightSingleLimiter,
+                    rateLimitKeySuffix);
+            }
+
+            var key = GetRequestCoalescingKey<T>(
+                definition,
+                uriParameters);
+
+            return RequestCoalescer.ExecuteAsync(
+                key,
+                requestCancellationToken => SendCoreAsync<T>(
+                    definition,
+                    uriParameters,
+                    bodyParameters,
+                    requestCancellationToken,
+                    additionalHeaders,
+                    weight,
+                    weightSingleLimiter,
+                    rateLimitKeySuffix),
+                () => HttpResult.Fail<T>(
+                    Exchange,
+                    new CancellationRequestedError()),
+                cancellationToken);
+        }
+
+        /// <summary>
+        /// Send a request to the base address based on the request definition
+        /// </summary>
+        /// <typeparam name="T">Response type</typeparam>
+        /// <param name="definition">Request definition</param>
+        /// <param name="uriParameters">Request query parameters</param>
+        /// <param name="bodyParameters">Request body parameters</param>
+        /// <param name="cancellationToken">Cancellation token</param>
+        /// <param name="additionalHeaders">Additional headers for this request</param>
+        /// <param name="weight">Override the request weight for this request definition, for example when the weight depends on the parameters</param>
+        /// <param name="weightSingleLimiter">Specify the weight to apply to the individual rate limit guard for this request</param>
+        /// <param name="rateLimitKeySuffix">An additional optional suffix for the key selector. Can be used to make rate limiting work based on parameters.</param>
+        protected virtual async Task<HttpResult<T>> SendCoreAsync<T>(RequestDefinition definition,
+            Parameters? uriParameters,
+            Parameters? bodyParameters,
             CancellationToken cancellationToken,
             Dictionary<string, string>? additionalHeaders = null,
             int? weight = null,
@@ -231,20 +251,20 @@ namespace CryptoExchange.Net.Clients
             if (definition.Authenticated && GetAuthenticationProvider() == null)
             {
                 _logger.RestApiNoApiCredentials(requestId, definition.Path);
-                return new WebCallResult<T>(new NoApiCredentialsError());
+                return HttpResult.Fail<T>(Exchange, new NoApiCredentialsError());
             }
 
             string? cacheKey = null;
             if (ShouldCache(definition))
             {
-                cacheKey = baseAddress + definition + uriParameters?.ToFormData();
+                cacheKey = GetCacheKey(definition, uriParameters);
                 _logger.CheckingCache(cacheKey);
                 var cachedValue = _cache.Get(cacheKey, ClientOptions.CachingMaxAge);
                 if (cachedValue != null)
                 {
                     _logger.CacheHit(cacheKey);
-                    var original = (WebCallResult<T>)cachedValue;
-                    return original.Cached();
+                    var original = (HttpResult<T>)cachedValue;
+                    return original with { DataSource = ResultDataSource.Cache };
                 }
 
                 _logger.CacheNotHit(cacheKey);
@@ -258,7 +278,6 @@ namespace CryptoExchange.Net.Clients
                 await CheckTimeSync(requestId, definition).ConfigureAwait(false);
 
                 var error = await RateLimitAsync(
-                    baseAddress,
                     requestId,
                     definition,
                     weight ?? definition.Weight,
@@ -266,11 +285,10 @@ namespace CryptoExchange.Net.Clients
                     weightSingleLimiter,
                     rateLimitKeySuffix).ConfigureAwait(false);
                 if (error != null)
-                    return new WebCallResult<T>(error);
+                    return HttpResult.Fail<T>(Exchange, error);
 
                 var request = CreateRequest(
                     requestId,
-                    baseAddress,
                     definition,
                     uriParameters,
                     bodyParameters,
@@ -284,7 +302,7 @@ namespace CryptoExchange.Net.Clients
                 if (result.Error is not CancellationRequestedError)
                 {
                     var originalData = OutputOriginalData ? result.OriginalData : "[Data only available when OutputOriginal = true]";
-                    if (!result)
+                    if (!result.Success)
                     {
                         _logger.RestApiErrorReceived(result.RequestId, result.ResponseStatusCode, (long)Math.Floor(result.ResponseTime!.Value.TotalMilliseconds), result.Error?.ToString(), originalData, result.Error?.Exception);
                     }
@@ -316,7 +334,6 @@ namespace CryptoExchange.Net.Clients
         /// Check rate limits for the request
         /// </summary>
         protected virtual async ValueTask<Error?> RateLimitAsync(
-            string host,
             int requestId,
             RequestDefinition definition,
             int weight,
@@ -333,18 +350,21 @@ namespace CryptoExchange.Net.Clients
 
                 if (ClientOptions.RateLimiterEnabled)
                 {
+                    var admissionOverride = AdmissionOverride.Value ?? ClientOptions.RateLimitAdmission?.Invoke(definition, requestWeight);
+                    var rateRatio = admissionOverride?.MaxUtilizationRatio ?? 1.0;                  
+
                     var limitResult = await definition.RateLimitGate.ProcessAsync(
                         _logger,
                         requestId,
                         RateLimitItemType.Request,
                         definition,
-                        host,
                         GetAuthenticationProvider()?.Key,
-                        requestWeight, 
+                        requestWeight,
                         ClientOptions.RateLimitingBehaviour,
-                        rateLimitKeySuffix,
+                        rateLimitKeySuffix + ClientOptions.RateLimitGroup,
+                        rateRatio,
                         cancellationToken).ConfigureAwait(false);
-                    if (!limitResult)
+                    if (!limitResult.Success)
                         return limitResult.Error!;
                 }
             }
@@ -358,19 +378,22 @@ namespace CryptoExchange.Net.Clients
                 if (ClientOptions.RateLimiterEnabled)
                 {
                     var singleRequestWeight = weightSingleLimiter ?? 1;
+                    var admissionOverride = AdmissionOverride.Value ?? ClientOptions.RateLimitAdmission?.Invoke(definition, singleRequestWeight);
+                    var rateRatio = admissionOverride?.MaxUtilizationRatio ?? 1.0;
+
                     var limitResult = await definition.RateLimitGate.ProcessSingleAsync(
                         _logger,
-                        requestId, 
+                        requestId,
                         definition.LimitGuard,
                         RateLimitItemType.Request,
                         definition,
-                        host, 
                         GetAuthenticationProvider()?.Key,
                         singleRequestWeight,
                         ClientOptions.RateLimitingBehaviour,
                         rateLimitKeySuffix,
+                        rateRatio,
                         cancellationToken).ConfigureAwait(false);
-                    if (!limitResult)
+                    if (!limitResult.Success)
                         return limitResult.Error!;
                 }
             }
@@ -382,7 +405,6 @@ namespace CryptoExchange.Net.Clients
         /// Creates a request object
         /// </summary>
         /// <param name="requestId">Id of the request</param>
-        /// <param name="baseAddress">Host and schema</param>
         /// <param name="definition">Request definition</param>
         /// <param name="uriParameters">The query parameters of the request</param>
         /// <param name="bodyParameters">The body parameters of the request</param>
@@ -390,19 +412,16 @@ namespace CryptoExchange.Net.Clients
         /// <returns></returns>
         protected virtual IRequest CreateRequest(
             int requestId,
-            string baseAddress,
             RequestDefinition definition,
-            ParameterCollection? uriParameters,
-            ParameterCollection? bodyParameters,
+            Parameters? uriParameters,
+            Parameters? bodyParameters,
             Dictionary<string, string>? additionalHeaders)
         {
             var requestConfiguration = new RestRequestConfiguration(
                 definition,
-                baseAddress,
-                uriParameters == null ? null : CreateParameterDictionary(uriParameters),
-                bodyParameters == null ? null : CreateParameterDictionary(bodyParameters),
+                uriParameters,
+                bodyParameters,
                 additionalHeaders,
-                definition.ArraySerialization ?? ArraySerialization,
                 definition.ParameterPosition ?? ParameterPositions[definition.Method],
                 definition.RequestBodyFormat ?? RequestBodyFormat);
 
@@ -414,20 +433,16 @@ namespace CryptoExchange.Net.Clients
             {
                 throw new Exception("Failed to authenticate request, make sure your API credentials are correct", ex);
             }
-            
+
             var queryString = requestConfiguration.GetQueryString(true);
             if (!string.IsNullOrEmpty(queryString) && !queryString.StartsWith("?"))
                 queryString = $"?{queryString}";
 
-            var path = baseAddress.AppendPath(definition.Path);
-            if (definition.ForcePathEndWithSlash == true && !path.EndsWith("/"))
-                path += "/";
-
-            var uri = new Uri(path + queryString);
+            var uri = new Uri(definition.FullUrl + queryString);
             var request = RequestFactory.Create(ClientOptions.HttpVersion, definition.Method, uri, requestId);
             request.Accept = MessageHandler.AcceptHeader;
 
-            if (requestConfiguration.Headers != null) 
+            if (requestConfiguration.Headers != null)
             {
                 foreach (var header in requestConfiguration.Headers)
                     request.AddHeader(header.Key, header.Value);
@@ -436,10 +451,12 @@ namespace CryptoExchange.Net.Clients
             foreach (var header in StandardRequestHeaders)
             {
                 // Only add it if it isn't overwritten
-                requestConfiguration.Headers ??= new Dictionary<string, string>();
-                if (!requestConfiguration.Headers.ContainsKey(header.Key))
+                if (requestConfiguration.Headers == null
+                    || !requestConfiguration.Headers.ContainsKey(header.Key))
+                {
                     request.AddHeader(header.Key, header.Value);
-            }            
+                }
+            }
 
             if (requestConfiguration.ParameterPosition == HttpMethodParameterPosition.InBody)
             {
@@ -451,10 +468,10 @@ namespace CryptoExchange.Net.Clients
                 }
                 else
                 {
-                    if (requestConfiguration.BodyParameters != null && requestConfiguration.BodyParameters.Count != 0)
+                    if (requestConfiguration.BodyParameters != null && !requestConfiguration.BodyParameters.Empty)
                         WriteParamBody(request, requestConfiguration.BodyParameters, contentType);
                     else if (OmitContentTypeHeaderWithoutContent != true)
-                        request.SetContent(RequestBodyEmptyContent, RequestBodyContentEncoding, contentType);                    
+                        request.SetContent(RequestBodyEmptyContent, RequestBodyContentEncoding, contentType);
                 }
             }
 
@@ -469,7 +486,7 @@ namespace CryptoExchange.Net.Clients
         /// <param name="gate">The ratelimit gate used</param>
         /// <param name="cancellationToken">Cancellation token</param>
         /// <returns></returns>
-        protected virtual async Task<WebCallResult<T>> GetResponseAsync2<T>(
+        protected virtual async Task<HttpResult<T>> GetResponseAsync2<T>(
             RequestDefinition requestDefinition,
             IRequest request,
             IRateLimitGate? gate,
@@ -535,16 +552,16 @@ namespace CryptoExchange.Net.Clients
                         {
                             _logger.LogError(ex, "Unhandled exception when parsing error response: {Message}", ex.Message);
                             var errorResult = new ServerError(ErrorInfo.Unknown with { Message = ex.Message });
-                            return new WebCallResult<T>(response.StatusCode, response.HttpVersion, response.ResponseHeaders, sw.Elapsed, response.ContentLength, originalData, request.RequestId, request.Uri.ToString(), request.Content, request.Method, request.GetHeaders(), ResultDataSource.Server, default, errorResult);
+                            return FailHttpRequest<T>(request, response, sw.Elapsed, originalData, errorResult);
                         }
                     }
 
-                    return new WebCallResult<T>(response.StatusCode, response.HttpVersion, response.ResponseHeaders, sw.Elapsed, response.ContentLength, originalData, request.RequestId, request.Uri.ToString(), request.Content, request.Method, request.GetHeaders(), ResultDataSource.Server, default, error);
+                    return FailHttpRequest<T>(request, response, sw.Elapsed, originalData, error);
                 }
 
-                if (typeof(T) == typeof(object))
+                if (typeof(T) == Unit.Type)
                     // Success status code and expected empty response, assume it's correct
-                    return new WebCallResult<T>(response.StatusCode, response.HttpVersion, response.ResponseHeaders, sw.Elapsed, 0, originalData, request.RequestId, request.Uri.ToString(), request.Content, request.Method, request.GetHeaders(), ResultDataSource.Server, default, null);
+                    return OkHttpRequest<T>(request, response, sw.Elapsed, originalData, default!);
 
                 // Data response received, inspect the message and check if it is an error or not
                 var parsedError = await MessageHandler.CheckForErrorResponse(
@@ -563,7 +580,7 @@ namespace CryptoExchange.Net.Clients
                     }
 
                     // Success status code, but TryParseError determined it was an error response
-                    return new WebCallResult<T>(response.StatusCode, response.HttpVersion, response.ResponseHeaders, sw.Elapsed, response.ContentLength, originalData, request.RequestId, request.Uri.ToString(), request.Content, request.Method, request.GetHeaders(), ResultDataSource.Server, default, parsedError);
+                    return FailHttpRequest<T>(request, response, sw.Elapsed, originalData, parsedError);
                 }
 
                 if (MessageHandler.RequiresSeekableStream)
@@ -571,45 +588,45 @@ namespace CryptoExchange.Net.Clients
                     responseStream.Position = 0;
 
                 // Try deserialization into the expected type
-                var (deserializeResult, deserializeError) = await MessageHandler.TryDeserializeAsync<T>(responseStream, cancellationToken).ConfigureAwait(false);                              
+                var (deserializeResult, deserializeError) = await MessageHandler.TryDeserializeAsync<T>(responseStream, cancellationToken).ConfigureAwait(false);
                 if (deserializeError != null)
-                    return new WebCallResult<T>(response.StatusCode, response.HttpVersion, response.ResponseHeaders, sw.Elapsed, response.ContentLength, originalData, request.RequestId, request.Uri.ToString(), request.Content, request.Method, request.GetHeaders(), ResultDataSource.Server, deserializeResult, deserializeError); ;
+                    return FailHttpRequest<T>(request, response, sw.Elapsed, originalData, deserializeError, deserializeResult);
 
                 try
                 {
                     // Check the deserialized response to see if it's an error or not
                     var responseError = MessageHandler.CheckDeserializedResponse(response.ResponseHeaders, deserializeResult);
                     if (responseError != null)
-                        return new WebCallResult<T>(response.StatusCode, response.HttpVersion, response.ResponseHeaders, sw.Elapsed, response.ContentLength, originalData, request.RequestId, request.Uri.ToString(), request.Content, request.Method, request.GetHeaders(), ResultDataSource.Server, deserializeResult, responseError);
+                        return FailHttpRequest<T>(request, response, sw.Elapsed, originalData, responseError, deserializeResult);
                 }
                 catch (Exception ex)
                 {
                     _logger.LogError(ex, "Unhandled exception when checking deserialized response: {Message}", ex.Message);
                     var error = new ServerError(ErrorInfo.Unknown with { Message = ex.Message });
-                    return new WebCallResult<T>(response.StatusCode, response.HttpVersion, response.ResponseHeaders, sw.Elapsed, response.ContentLength, originalData, request.RequestId, request.Uri.ToString(), request.Content, request.Method, request.GetHeaders(), ResultDataSource.Server, deserializeResult, error);
+                    return FailHttpRequest<T>(request, response, sw.Elapsed, originalData, error, deserializeResult);
                 }
 
-                return new WebCallResult<T>(response.StatusCode, response.HttpVersion, response.ResponseHeaders, sw.Elapsed, response.ContentLength, originalData, request.RequestId, request.Uri.ToString(), request.Content, request.Method, request.GetHeaders(), ResultDataSource.Server, deserializeResult, null);
+                return OkHttpRequest<T>(request, response, sw.Elapsed, originalData, deserializeResult!);
             }
             catch (HttpRequestException requestException)
             {
                 // Request exception, can't reach server for instance
                 var error = new WebError(requestException.Message, requestException);
-                return new WebCallResult<T>(null, null, null, sw.Elapsed, null, null, request.RequestId, request.Uri.ToString(), request.Content, request.Method, request.GetHeaders(), ResultDataSource.Server, default, error);
+                return FailHttpRequest<T>(request, response, sw.Elapsed, null, error);
             }
             catch (OperationCanceledException canceledException)
             {
                 if (cancellationToken != default && canceledException.CancellationToken == cancellationToken)
                 {
                     // Cancellation token canceled by caller
-                    return new WebCallResult<T>(null, null, null, sw.Elapsed, null, null, request.RequestId, request.Uri.ToString(), request.Content, request.Method, request.GetHeaders(), ResultDataSource.Server, default, new CancellationRequestedError(canceledException));
+                    return FailHttpRequest<T>(request, null, sw.Elapsed, null, new CancellationRequestedError(canceledException));
                 }
                 else
                 {
                     // Request timed out
                     var error = new WebError($"Request timed out", exception: canceledException);
                     error.ErrorType = ErrorType.Timeout;
-                    return new WebCallResult<T>(null, null, null, sw.Elapsed, null, null, request.RequestId, request.Uri.ToString(), request.Content, request.Method, request.GetHeaders(), ResultDataSource.Server, default, error);
+                    return FailHttpRequest<T>(request, null, sw.Elapsed, null, error);
                 }
             }
             catch (ArgumentException argumentException)
@@ -618,7 +635,7 @@ namespace CryptoExchange.Net.Clients
                 {
                     // Unsupported HTTP version error .net framework
                     var error = ArgumentError.Invalid(nameof(RestExchangeOptions.HttpVersion), $"Invalid HTTP version {request.HttpVersion}: " + argumentException.Message);
-                    return new WebCallResult<T>(null, null, null, sw.Elapsed, null, null, request.RequestId, request.Uri.ToString(), request.Content, request.Method, request.GetHeaders(), ResultDataSource.Server, default, error);
+                    return FailHttpRequest<T>(request, null, sw.Elapsed, null, error);
                 }
 
                 throw;
@@ -629,7 +646,7 @@ namespace CryptoExchange.Net.Clients
                 {
                     // Unsupported HTTP version error dotnet code
                     var error = ArgumentError.Invalid(nameof(RestExchangeOptions.HttpVersion), $"Invalid HTTP version {request.HttpVersion}: " + notSupportedException.Message);
-                    return new WebCallResult<T>(null, null, null, sw.Elapsed, null, null, request.RequestId, request.Uri.ToString(), request.Content, request.Method, request.GetHeaders(), ResultDataSource.Server, default, error);
+                    return FailHttpRequest<T>(request, null, sw.Elapsed, null, error);
                 }
 
                 throw;
@@ -641,16 +658,55 @@ namespace CryptoExchange.Net.Clients
             }
         }
 
+        private HttpResult<T> OkHttpRequest<T>(IRequest request, IResponse response, TimeSpan elapsed, string? originalData, T result)
+        {
+            return HttpResult.Ok(
+                Exchange,
+                response.StatusCode,
+                response.HttpVersion,
+                response.ResponseHeaders,
+                elapsed,
+                response.ContentLength,
+                originalData,
+                request.RequestId,
+                request.Uri.ToString(),
+                request.Content,
+                request.Method,
+                request.GetHeaders(),
+                ResultDataSource.Server,
+                result);
+        }
+
+        private HttpResult<T> FailHttpRequest<T>(IRequest request, IResponse? response, TimeSpan elapsed, string? originalData, Error error, T? result = default)
+        {
+            return HttpResult.Fail<T>(
+                Exchange,
+                response?.StatusCode,
+                response?.HttpVersion,
+                response?.ResponseHeaders,
+                elapsed,
+                response?.ContentLength,
+                originalData,
+                request.RequestId,
+                request.Uri.ToString(),
+                request.Content,
+                request.Method,
+                request.GetHeaders(),
+                ResultDataSource.Server,
+                error,
+                result);
+        }
+
         /// <summary>
         /// Can be used to indicate that a request should be retried. Defaults to false. Make sure to retry a max number of times (based on the the tries parameter) or the request will retry forever.
         /// Note that this is always called; even when the request might be successful
         /// </summary>
-        /// <typeparam name="T">WebCallResult type parameter</typeparam>
+        /// <typeparam name="T">HttpResult type parameter</typeparam>
         /// <param name="gate">The rate limit gate the call used</param>
         /// <param name="callResult">The result of the call</param>
         /// <param name="tries">The current try number</param>
         /// <returns>True if call should retry, false if the call should return</returns>
-        protected virtual async ValueTask<bool> ShouldRetryRequestAsync<T>(IRateLimitGate? gate, WebCallResult<T> callResult, int tries)
+        protected virtual async ValueTask<bool> ShouldRetryRequestAsync<T>(IRateLimitGate? gate, HttpResult<T> callResult, int tries)
         {
             if (tries >= 2)
                 // Only retry once
@@ -681,7 +737,7 @@ namespace CryptoExchange.Net.Clients
         /// <param name="request">The request to set the parameters on</param>
         /// <param name="parameters">The parameters to set</param>
         /// <param name="contentType">The content type of the data</param>
-        protected virtual void WriteParamBody(IRequest request, IDictionary<string, object> parameters, string contentType)
+        protected virtual void WriteParamBody(IRequest request, Parameters parameters, string contentType)
         {
             if (contentType == Constants.JsonContentHeader)
             {
@@ -691,10 +747,18 @@ namespace CryptoExchange.Net.Clients
 
                 // Write the parameters as json in the body
                 string stringData;
-                if (parameters.Count == 1 && parameters.TryGetValue(Constants.BodyPlaceHolderKey, out object? value))
-                    stringData = stringSerializer.Serialize(value);
+                if (parameters.BodyValue != null)
+                {
+                    if (parameters.BodyValue is string bodyString)
+                        stringData = bodyString;
+                    else
+                        stringData = stringSerializer.Serialize(parameters.BodyValue);
+                }
                 else
+                {
                     stringData = stringSerializer.Serialize(parameters);
+                }
+
                 request.SetContent(stringData, RequestBodyContentEncoding, contentType);
             }
             else if (contentType == Constants.FormContentHeader)
@@ -705,24 +769,11 @@ namespace CryptoExchange.Net.Clients
             }
         }
 
-        /// <summary>
-        /// Create the parameter IDictionary
-        /// </summary>
-        /// <param name="parameters"></param>
-        /// <returns></returns>
-        protected internal IDictionary<string, object> CreateParameterDictionary(IDictionary<string, object> parameters)
-        {
-            if (!OrderParameters)
-                return parameters;
-
-            return new SortedDictionary<string, object>(parameters, ParameterOrderComparer);
-        }
-
         /// <summary>
         /// Retrieve the server time for the purpose of syncing time between client and server to prevent authentication issues
         /// </summary>
         /// <returns>Server time</returns>
-        protected virtual Task<WebCallResult<DateTime>> GetServerTimestampAsync() => throw new NotImplementedException();
+        protected virtual Task<HttpResult<DateTime>> GetServerTimestampAsync() => throw new NotImplementedException();
 
         private async ValueTask CheckTimeSync(int requestId, RequestDefinition definition)
         {
@@ -757,7 +808,7 @@ namespace CryptoExchange.Net.Clients
                     return;
 
                 var localTime = DateTime.UtcNow;
-                WebCallResult<DateTime> result;
+                HttpResult<DateTime> result;
                 try
                 {
                     result = await GetServerTimestampAsync().ConfigureAwait(false);
@@ -767,7 +818,7 @@ namespace CryptoExchange.Net.Clients
                     throw new ArgumentException("AutoTimestamp is not available for this API");
                 }
 
-                if (!result)
+                if (!result.Success)
                 {
                     _logger.LogWarning("Failed to determine time offset between client and server, timestamping might fail");
                     return;
@@ -778,7 +829,7 @@ namespace CryptoExchange.Net.Clients
                     // If this was the first request make another one to calculate the offset since the first one can be slower
                     localTime = DateTime.UtcNow;
                     result = await GetServerTimestampAsync().ConfigureAwait(false);
-                    if (!result)
+                    if (!result.Success)
                     {
                         _logger.LogWarning("Failed to determine time offset between client and server, timestamping might fail");
                         return;
@@ -819,6 +870,41 @@ namespace CryptoExchange.Net.Clients
             && definition.Method == HttpMethod.Get
             && !definition.PreventCaching;
 
+        /// <summary>
+        /// Produce a unique cache key for the request based on the request definition and parameters.
+        /// </summary>
+        protected virtual string GetCacheKey(RequestDefinition definition, Parameters? parameters)
+        {
+            return definition.FullUrl + definition + parameters?.ToFormData();
+        }
+
+        /// <summary>
+        /// Whether a request can be coalesced or not
+        /// </summary>
+        protected virtual bool ShouldCoalesce(
+            RequestDefinition definition,
+            Dictionary<string, string>? additionalHeaders)
+        {
+            return ClientOptions.RequestCoalescingEnabled                       // Enabled in client options
+                && !definition.PreventRequestCoalescing                         // Enabled in request definition
+                && definition.Method == HttpMethod.Get                          // Is a GET request
+                && !definition.Authenticated                                    // Not an authenticated request
+                && (additionalHeaders == null || additionalHeaders.Count == 0); // No additional headers that might change the response
+        }
+
+        /// <summary>
+        /// Get a unique key for coalescing requests based on the request definition, parameters, and the type of the expected response.
+        /// </summary>
+        protected virtual RequestCoalescingKey GetRequestCoalescingKey<T>(
+            RequestDefinition definition,
+            Parameters? uriParameters)
+        {
+            return new RequestCoalescingKey(
+                definition.Method.Method,
+                definition.FullUrl,
+                uriParameters?.ToFormData(),
+                typeof(T));
+        }
 
         /// <inheritdoc />
         public virtual void SetOptions(UpdateOptions options)
@@ -845,12 +931,14 @@ namespace CryptoExchange.Net.Clients
         /// ctor
         /// </summary>
         protected RestApiClient(
-            ILogger logger,
+            ILoggerFactory? loggerFactory,
+            string exchangeName,
             HttpClient? httpClient,
             string baseAddress,
             RestExchangeOptions options,
             RestApiOptions apiOptions) : base(
-                logger,
+                loggerFactory,
+                exchangeName,
                 httpClient,
                 baseAddress,
                 options,
@@ -877,12 +965,14 @@ namespace CryptoExchange.Net.Clients
         /// ctor
         /// </summary>
         protected RestApiClient(
-            ILogger logger,
+            ILoggerFactory? loggerFactory,
+            string exchangeName,
             HttpClient? httpClient,
             string baseAddress,
             RestExchangeOptions<TEnvironment, TApiCredentials> options,
             RestApiOptions apiOptions) : base(
-                logger,
+                loggerFactory,
+                exchangeName,
                 httpClient,
                 baseAddress,
                 options,
@@ -904,6 +994,12 @@ namespace CryptoExchange.Net.Clients
 
             ApiCredentials = (TApiCredentials?)options.ApiCredentials?.Copy() ?? ApiCredentials;
         }
+
+        /// <inheritdoc />
+        protected override string GetCacheKey(RequestDefinition definition, Parameters? parameters)
+        {
+            return definition.FullUrl + definition + parameters?.ToFormData() + GetAuthenticationProvider()?.Key;
+        }
     }
 
     /// <inheritdoc />
@@ -912,13 +1008,18 @@ namespace CryptoExchange.Net.Clients
         where TAuthenticationProvider : AuthenticationProvider<TApiCredentials>
         where TEnvironment : TradeEnvironment
     {
-
-        private bool _authProviderInitialized = false;
-        private TAuthenticationProvider? _authenticationProvider;
+        /// <summary>
+        /// Auth provider initialized field
+        /// </summary>
+        protected bool _authProviderInitialized = false;
+        /// <summary>
+        /// Auth provider field
+        /// </summary>
+        protected TAuthenticationProvider? _authenticationProvider;
         /// <summary>
         /// The authentication provider for this API client. (null if no credentials are set)
         /// </summary>
-        public TAuthenticationProvider? AuthenticationProvider
+        public virtual TAuthenticationProvider? AuthenticationProvider
         {
             get
             {
@@ -932,7 +1033,7 @@ namespace CryptoExchange.Net.Clients
 
                 return _authenticationProvider;
             }
-            internal set => _authenticationProvider = value;
+            protected internal set => _authenticationProvider = value;
         }
 
         /// <inheritdoc />
@@ -942,12 +1043,14 @@ namespace CryptoExchange.Net.Clients
         /// ctor
         /// </summary>
         protected RestApiClient(
-            ILogger logger, 
+            ILoggerFactory? loggerFactory, 
+            string exchangeName,
             HttpClient? httpClient,
             string baseAddress,
             RestExchangeOptions<TEnvironment, TApiCredentials> options, 
             RestApiOptions apiOptions) : base(
-                logger, 
+                loggerFactory, 
+                exchangeName,
                 httpClient,
                 baseAddress,
                 options, 

CryptoExchange.Net/Clients/SocketApiClient.cs

@@ -15,6 +15,7 @@ using CryptoExchange.Net.Sockets.Default.Interfaces;
 using CryptoExchange.Net.Sockets.HighPerf;
 using CryptoExchange.Net.Sockets.HighPerf.Interfaces;
 using CryptoExchange.Net.Sockets.Interfaces;
+using CryptoExchange.Net.TokenManagement;
 using Microsoft.Extensions.Logging;
 using System;
 using System.Collections.Concurrent;
@@ -71,11 +72,6 @@ namespace CryptoExchange.Net.Clients
         /// </summary>
         protected List<SystemSubscription> systemSubscriptions = new();
 
-        /// <summary>
-        /// If a message is received on the socket which is not handled by a handler this boolean determines whether this logs an error message
-        /// </summary>
-        protected internal bool UnhandledMessageExpected { get; set; }
-
         /// <summary>
         /// The rate limiters 
         /// </summary>
@@ -101,6 +97,11 @@ namespace CryptoExchange.Net.Clients
         /// </summary>
         protected bool AllowTopicsOnTheSameConnection { get; set; } = true;
 
+        /// <summary>
+        /// Whether to allow usage of a current public WebSocket connection for an authenticated request
+        /// </summary>
+        protected bool UsePublicConnectionForAuth { get; set; } = false;
+
         /// <inheritdoc />
         public double IncomingKbps
         {
@@ -153,21 +154,26 @@ namespace CryptoExchange.Net.Clients
         /// Configured environment name
         /// </summary>
         public abstract string EnvironmentName { get; }
+
+        private int _isDisposed;
         #endregion
 
         /// <summary>
         /// ctor
         /// </summary>
-        /// <param name="logger">log</param>
+        /// <param name="loggerFactory">Logger factory</param>
+        /// <param name="exchangeName">Exchange name</param>
         /// <param name="options">Client options</param>
         /// <param name="baseAddress">Base address for this API client</param>
         /// <param name="apiOptions">The Api client options</param>
         public SocketApiClient(
-            ILogger logger, 
+            ILoggerFactory? loggerFactory, 
+            string exchangeName,
             string baseAddress, 
             SocketExchangeOptions options,
             SocketApiOptions apiOptions)
-            : base(logger,
+            : base(loggerFactory,
+                  exchangeName,
                   apiOptions.OutputOriginalData ?? options.OutputOriginalData,
                   baseAddress,
                   options,
@@ -216,7 +222,7 @@ namespace CryptoExchange.Net.Clients
         /// <param name="interval"></param>
         /// <param name="queryDelegate"></param>
         /// <param name="callback"></param>
-        protected virtual void RegisterPeriodicQuery(string identifier, TimeSpan interval, Func<ISocketConnection, Query> queryDelegate, Action<SocketConnection, CallResult>? callback)
+        protected virtual void RegisterPeriodicQuery(string identifier, TimeSpan interval, Func<ISocketConnection, Query> queryDelegate, Action<SocketConnection, WebSocketResult>? callback)
         {
             PeriodicTaskRegistrations.Add(new PeriodicTaskRegistration
             {
@@ -233,7 +239,7 @@ namespace CryptoExchange.Net.Clients
         /// <param name="subscription">The subscription</param>
         /// <param name="ct">Cancellation token for closing this subscription</param>
         /// <returns></returns>
-        protected virtual Task<CallResult<UpdateSubscription>> SubscribeAsync(Subscription subscription, CancellationToken ct)
+        protected virtual Task<WebSocketResult<UpdateSubscription>> SubscribeAsync(Subscription subscription, CancellationToken ct)
         {
             return SubscribeAsync(BaseAddress, subscription, ct);
         }
@@ -245,86 +251,102 @@ namespace CryptoExchange.Net.Clients
         /// <param name="subscription">The subscription</param>
         /// <param name="ct">Cancellation token for closing this subscription</param>
         /// <returns></returns>
-        protected virtual async Task<CallResult<UpdateSubscription>> SubscribeAsync(string url, Subscription subscription, CancellationToken ct)
+        protected virtual async Task<WebSocketResult<UpdateSubscription>> SubscribeAsync(string url, Subscription subscription, CancellationToken ct)
         {
-            if (_disposing)
-                return new CallResult<UpdateSubscription>(new InvalidOperationError("Client disposed, can't subscribe"));
-
-            if (subscription.Authenticated && GetAuthenticationProvider() == null)
-            {
-                _logger.LogWarning("Failed to subscribe, private subscription but no API credentials set");
-                return new CallResult<UpdateSubscription>(new NoApiCredentialsError());
-            }
-
-            if (subscription.IndividualSubscriptionCount > MaxIndividualSubscriptionsPerConnection)
-                return new CallResult<UpdateSubscription>(ArgumentError.Invalid("subscriptions", $"Max number of subscriptions in a single call is {MaxIndividualSubscriptionsPerConnection}"));
-
-            SocketConnection socketConnection;
-            var released = false;
-            // Wait for a semaphore here, so we only connect 1 socket at a time.
-            // This is necessary for being able to see if connections can be combined
+            bool successResult = false;
             try
             {
-                await semaphoreSlim.WaitAsync(ct).ConfigureAwait(false);
-            }
-            catch (OperationCanceledException tce)
-            {
-                return new CallResult<UpdateSubscription>(new CancellationRequestedError(tce));
-            }
+                if (_disposed)
+                    return WebSocketResult.Fail<UpdateSubscription>(Exchange, new InvalidOperationError("Client disposed, can't subscribe"));
 
-            try
-            {
-                while (true)
+                if (subscription.Authenticated && GetAuthenticationProvider() == null)
                 {
-                    // Get a new or existing socket connection
-                    var socketResult = await GetSocketConnection(url, subscription.Authenticated, false, ct, subscription.Topic, subscription.IndividualSubscriptionCount).ConfigureAwait(false);
-                    if (!socketResult)
-                        return socketResult.As<UpdateSubscription>(null);
-
-                    socketConnection = socketResult.Data;
-
-                    // Add a subscription on the socket connection
-                    var success = socketConnection.AddSubscription(subscription);
-                    if (!success)
-                    {
-                        _logger.FailedToAddSubscriptionRetryOnDifferentConnection(socketConnection.SocketId);
-                        continue;
-                    }
-
-                    if (ClientOptions.SocketSubscriptionsCombineTarget == 1)
-                    {
-                        // Only 1 subscription per connection, so no need to wait for connection since a new subscription will create a new connection anyway
-                        semaphoreSlim.Release();
-                        released = true;
-                    }
-
-                    var needsConnecting = !socketConnection.Connected;
-
-                    var connectResult = await ConnectIfNeededAsync(socketConnection, subscription.Authenticated, ct).ConfigureAwait(false);
-                    if (!connectResult)
-                        return new CallResult<UpdateSubscription>(connectResult.Error!);
-
-                    break;
+                    _logger.LogWarning("Failed to subscribe, private subscription but no API credentials set");
+                    return WebSocketResult.Fail<UpdateSubscription>(Exchange, new NoApiCredentialsError());
                 }
+
+                if (subscription.IndividualSubscriptionCount > MaxIndividualSubscriptionsPerConnection)
+                    return WebSocketResult.Fail<UpdateSubscription>(Exchange, ArgumentError.Invalid("subscriptions", $"Max number of subscriptions in a single call is {MaxIndividualSubscriptionsPerConnection}"));
+
+                SocketConnection socketConnection;
+                var released = false;
+                // Wait for a semaphore here, so we only connect 1 socket at a time.
+                // This is necessary for being able to see if connections can be combined
+                try
+                {
+                    await semaphoreSlim.WaitAsync(ct).ConfigureAwait(false);
+                }
+                catch (OperationCanceledException tce)
+                {
+                    return WebSocketResult.Fail<UpdateSubscription>(Exchange, new CancellationRequestedError(tce));
+                }
+
+                try
+                {
+                    while (true)
+                    {
+                        // Get a new or existing socket connection
+                        var socketResult = await GetSocketConnection(url, subscription.Authenticated, false, ct, subscription.Topic, subscription.IndividualSubscriptionCount).ConfigureAwait(false);
+                        if (!socketResult.Success)
+                            return WebSocketResult.Fail<UpdateSubscription>(Exchange, socketResult.Error);
+
+                        socketConnection = socketResult.Data;
+
+                        // Add a subscription on the socket connection
+                        var success = socketConnection.AddSubscription(subscription);
+                        if (!success)
+                        {
+                            _logger.FailedToAddSubscriptionRetryOnDifferentConnection(socketConnection.SocketId);
+                            continue;
+                        }
+
+                        if (ClientOptions.SocketSubscriptionsCombineTarget == 1)
+                        {
+                            // Only 1 subscription per connection, so no need to wait for connection since a new subscription will create a new connection anyway
+                            semaphoreSlim.Release();
+                            released = true;
+                        }
+
+                        var needsConnecting = !socketConnection.Connected;
+
+                        var connectResult = await ConnectIfNeededAsync(socketConnection, subscription.Authenticated, ct).ConfigureAwait(false);
+                        if (!connectResult.Success)
+                            return WebSocketResult.Fail<UpdateSubscription>(Exchange, connectResult.Error!);
+
+                        break;
+                    }
+                }
+                finally
+                {
+                    if (!released)
+                        semaphoreSlim.Release();
+                }
+
+                if (socketConnection.PausedActivity)
+                {
+                    _logger.HasBeenPausedCantSubscribeAtThisMoment(socketConnection.SocketId);
+                    return WebSocketResult.Fail<UpdateSubscription>(Exchange, new ServerError(new ErrorInfo(ErrorType.WebsocketPaused, "Socket is paused")));
+                }
+
+                var subscribeResult = await socketConnection.TrySubscribeAsync(subscription, true, ct).ConfigureAwait(false);
+                if (!subscribeResult.Success)
+                    return WebSocketResult.Fail<UpdateSubscription>(Exchange, subscribeResult.Error!);
+
+                successResult = true;
+                _logger.SubscriptionCompletedSuccessfully(socketConnection.SocketId, subscription.Id);
+                return WebSocketResult.Ok(
+                    Exchange,
+                    socketConnection.SocketId,
+                    subscribeResult.ResponseTime!.Value,
+                    subscribeResult.RequestId!.Value,
+                    subscribeResult.Url,
+                    new UpdateSubscription(socketConnection, subscription));
             }
             finally
             {
-                if (!released)
-                    semaphoreSlim.Release();
+                if (!successResult && subscription.TokenLease != null)
+                    _ = subscription.TokenLease.ReleaseAsync();
             }
-
-            if (socketConnection.PausedActivity)
-            {
-                _logger.HasBeenPausedCantSubscribeAtThisMoment(socketConnection.SocketId);
-                return new CallResult<UpdateSubscription>(new ServerError(new ErrorInfo(ErrorType.WebsocketPaused, "Socket is paused")));
-            }
-
-            var subscribeResult = await socketConnection.TrySubscribeAsync(subscription, true, ct).ConfigureAwait(false);
-            if (!subscribeResult)
-                return new CallResult<UpdateSubscription>(subscribeResult.Error!);
-
-            _logger.SubscriptionCompletedSuccessfully(socketConnection.SocketId, subscription.Id);
-            return new CallResult<UpdateSubscription>(new UpdateSubscription(socketConnection, subscription));
         }
 
         /// <summary>
@@ -335,14 +357,14 @@ namespace CryptoExchange.Net.Clients
         /// <param name="connectionFactory">The factory for creating a socket connection</param>
         /// <param name="ct">Cancellation token for closing this subscription</param>
         /// <returns></returns>
-        protected virtual async Task<CallResult<HighPerfUpdateSubscription>> SubscribeHighPerfAsync<TUpdateType>(
+        protected virtual async Task<WebSocketResult<HighPerfUpdateSubscription>> SubscribeHighPerfAsync<TUpdateType>(
             string url,
             HighPerfSubscription<TUpdateType> subscription,
             IHighPerfConnectionFactory connectionFactory,
             CancellationToken ct)
         {
-            if (_disposing)
-                return new CallResult<HighPerfUpdateSubscription>(new InvalidOperationError("Client disposed, can't subscribe"));
+            if (_disposed)
+                return WebSocketResult.Fail<HighPerfUpdateSubscription>(Exchange, new InvalidOperationError("Client disposed, can't subscribe"));
 
             HighPerfSocketConnection<TUpdateType> socketConnection;
             var released = false;
@@ -354,7 +376,7 @@ namespace CryptoExchange.Net.Clients
             }
             catch (OperationCanceledException tce)
             {
-                return new CallResult<HighPerfUpdateSubscription>(new CancellationRequestedError(tce));
+                return WebSocketResult.Fail<HighPerfUpdateSubscription>(Exchange, new CancellationRequestedError(tce));
             }
 
             try
@@ -363,8 +385,8 @@ namespace CryptoExchange.Net.Clients
                 {
                     // Get a new or existing socket connection
                     var socketResult = await GetHighPerfSocketConnection<TUpdateType>(url, connectionFactory, ct).ConfigureAwait(false);
-                    if (!socketResult)
-                        return socketResult.As<HighPerfUpdateSubscription>(null);
+                    if (!socketResult.Success)
+                        return WebSocketResult.Fail<HighPerfUpdateSubscription>(Exchange, socketResult.Error);
 
                     socketConnection = socketResult.Data;
 
@@ -383,11 +405,9 @@ namespace CryptoExchange.Net.Clients
                         released = true;
                     }
 
-                    var needsConnecting = !socketConnection.Connected;
-
                     var connectResult = await ConnectIfNeededAsync(socketConnection, false, ct).ConfigureAwait(false);
-                    if (!connectResult)
-                        return new CallResult<HighPerfUpdateSubscription>(connectResult.Error!);
+                    if (!connectResult.Success)
+                        return WebSocketResult.Fail<HighPerfUpdateSubscription>(Exchange, connectResult.Error!);
 
                     break;
                 }
@@ -403,10 +423,10 @@ namespace CryptoExchange.Net.Clients
             {
                 // Send the request and wait for answer
                 var sendResult = await socketConnection.SendAsync(subRequest).ConfigureAwait(false);
-                if (!sendResult)
+                if (!sendResult.Success)
                 {
                     await socketConnection.CloseAsync().ConfigureAwait(false);
-                    return new CallResult<HighPerfUpdateSubscription>(sendResult.Error!);                    
+                    return WebSocketResult.Fail<HighPerfUpdateSubscription>(Exchange, sendResult.Error!);                    
                 }
             }
 
@@ -420,7 +440,13 @@ namespace CryptoExchange.Net.Clients
             }
 
             _logger.SubscriptionCompletedSuccessfully(socketConnection.SocketId, subscription.Id);
-            return new CallResult<HighPerfUpdateSubscription>(new HighPerfUpdateSubscription(socketConnection, subscription));
+            return WebSocketResult.Ok(
+                Exchange,
+                socketConnection.SocketId,
+                default,
+                default,
+                socketConnection.ConnectionUri.ToString(),
+                new HighPerfUpdateSubscription(socketConnection, subscription));
         }
 
         /// <summary>
@@ -430,7 +456,7 @@ namespace CryptoExchange.Net.Clients
         /// <param name="query">The query</param>
         /// <param name="ct">Cancellation token</param>
         /// <returns></returns>
-        protected virtual Task<CallResult<THandlerResponse>> QueryAsync<THandlerResponse>(Query<THandlerResponse> query, CancellationToken ct = default)
+        protected virtual Task<QueryResult<THandlerResponse>> QueryAsync<THandlerResponse>(Query<THandlerResponse> query, CancellationToken ct = default)
         {
             return QueryAsync(BaseAddress, query, ct);
         }
@@ -443,13 +469,13 @@ namespace CryptoExchange.Net.Clients
         /// <param name="query">The query</param>
         /// <param name="ct">Cancellation token</param>
         /// <returns></returns>
-        protected virtual async Task<CallResult<THandlerResponse>> QueryAsync<THandlerResponse>(string url, Query<THandlerResponse> query, CancellationToken ct = default)
+        protected virtual async Task<QueryResult<THandlerResponse>> QueryAsync<THandlerResponse>(string url, Query<THandlerResponse> query, CancellationToken ct = default)
         {
-            if (_disposing)
-                return new CallResult<THandlerResponse>(new InvalidOperationError("Client disposed, can't query"));
+            if (_disposed)
+                return QueryResult.Fail<THandlerResponse>(Exchange, new InvalidOperationError("Client disposed, can't query"));
 
             if (ct.IsCancellationRequested)
-                return new CallResult<THandlerResponse>(new CancellationRequestedError());
+                return QueryResult.Fail<THandlerResponse>(Exchange, new CancellationRequestedError());
 
             SocketConnection socketConnection;
             var released = false;
@@ -457,8 +483,8 @@ namespace CryptoExchange.Net.Clients
             try
             {
                 var socketResult = await GetSocketConnection(url, query.Authenticated, true, ct).ConfigureAwait(false);
-                if (!socketResult)
-                    return socketResult.As<THandlerResponse>(default);
+                if (!socketResult.Success)
+                    return QueryResult.Fail<THandlerResponse>(Exchange, socketResult.Error);
 
                 socketConnection = socketResult.Data;
 
@@ -470,8 +496,8 @@ namespace CryptoExchange.Net.Clients
                 }
 
                 var connectResult = await ConnectIfNeededAsync(socketConnection, query.Authenticated, ct).ConfigureAwait(false);
-                if (!connectResult)
-                    return new CallResult<THandlerResponse>(connectResult.Error!);
+                if (!connectResult.Success)
+                    return QueryResult.Fail<THandlerResponse>(Exchange, connectResult.Error!);
             }
             finally
             {
@@ -482,11 +508,11 @@ namespace CryptoExchange.Net.Clients
             if (socketConnection.PausedActivity)
             {
                 _logger.HasBeenPausedCantSendQueryAtThisMoment(socketConnection.SocketId);
-                return new CallResult<THandlerResponse>(new ServerError(new ErrorInfo(ErrorType.WebsocketPaused, "Socket is paused")));
+                return QueryResult.Fail<THandlerResponse>(Exchange, new ServerError(new ErrorInfo(ErrorType.WebsocketPaused, "Socket is paused")));
             }
 
             if (ct.IsCancellationRequested)
-                return new CallResult<THandlerResponse>(new CancellationRequestedError());
+                return QueryResult.Fail<THandlerResponse>(Exchange, new CancellationRequestedError());
 
             return await socketConnection.SendAndWaitQueryAsync(query, ct).ConfigureAwait(false);
         }
@@ -501,23 +527,23 @@ namespace CryptoExchange.Net.Clients
         protected virtual async Task<CallResult> ConnectIfNeededAsync(ISocketConnection socket, bool authenticated, CancellationToken ct)
         {
             if (socket.Connected)
-                return CallResult.SuccessResult;
+                return CallResult.Ok();
 
             var connectResult = await ConnectSocketAsync(socket, ct).ConfigureAwait(false);
-            if (!connectResult)
+            if (!connectResult.Success)
                 return connectResult;
 
             if (ClientOptions.DelayAfterConnect != TimeSpan.Zero)
                 await Task.Delay(ClientOptions.DelayAfterConnect).ConfigureAwait(false);
 
             if (!authenticated || socket.Authenticated)
-                return CallResult.SuccessResult;
+                return CallResult.Ok();
 
             if (socket is not SocketConnection sc)
                 throw new InvalidOperationException("HighPerfSocketConnection not supported for authentication");
 
             var result = await AuthenticateSocketAsync(sc).ConfigureAwait(false);
-            if (!result)
+            if (!result.Success)
                 await socket.CloseAsync().ConfigureAwait(false);
 
             return result;
@@ -531,29 +557,28 @@ namespace CryptoExchange.Net.Clients
         public virtual async Task<CallResult> AuthenticateSocketAsync(SocketConnection socket)
         {
             if (GetAuthenticationProvider() == null)
-                return new CallResult(new NoApiCredentialsError());
+                return CallResult.Fail(new NoApiCredentialsError());
 
             _logger.AttemptingToAuthenticate(socket.SocketId);
             var authRequest = await GetAuthenticationRequestAsync(socket).ConfigureAwait(false);
             if (authRequest != null)
             {
                 var result = await socket.SendAndWaitQueryAsync(authRequest).ConfigureAwait(false);
-
-                if (!result)
+                if (!result.Success)
                 {
                     _logger.AuthenticationFailed(socket.SocketId);
                     if (socket.Connected)
                         await socket.CloseAsync().ConfigureAwait(false);
 
                     result.Error!.Message = "Authentication failed: " + result.Error.Message;
-                    return new CallResult(result.Error)!;
+                    return CallResult.Fail(result.Error)!;
                 }
 
                 _logger.Authenticated(socket.SocketId);
             }
 
             socket.Authenticated = true;
-            return CallResult.SuccessResult;
+            return CallResult.Ok();
         }
 
         /// <summary>
@@ -582,7 +607,7 @@ namespace CryptoExchange.Net.Clients
         /// <returns></returns>
         protected virtual Task<CallResult<string?>> GetConnectionUrlAsync(string address, bool authentication)
         {
-            return Task.FromResult(new CallResult<string?>(address));
+            return Task.FromResult(CallResult.Ok<string?>(address));
         }
 
         /// <summary>
@@ -602,7 +627,22 @@ namespace CryptoExchange.Net.Clients
         /// <returns></returns>
         protected internal virtual Task<CallResult> RevitalizeRequestAsync(Subscription subscription)
         {
-            return Task.FromResult(CallResult.SuccessResult);
+            return Task.FromResult(CallResult.Ok());
+        }
+
+        /// <summary>
+        /// Whether the connection can be used for a new subscription or query with the provided parameters
+        /// </summary>
+        /// <param name="connection">The connection to check</param>
+        /// <param name="address">The address set by the request</param>
+        /// <param name="authenticated">Whether the request needs an authenticated connection</param>
+        /// <param name="topic">Topic of the request</param>
+        /// <returns>True if connection can be used</returns>
+        protected virtual bool ConnectionCanBeUsedFor(SocketConnection connection, string address, bool authenticated, string? topic = null)
+        {
+            return connection.ConnectionUriString.Equals(address.TrimEnd('/'), StringComparison.Ordinal)
+                && connection.ApiClient.ClientName.Equals(ClientName, StringComparison.Ordinal)
+                && (AllowTopicsOnTheSameConnection || !connection.Topics.Contains(topic));
         }
 
         /// <summary>
@@ -623,24 +663,20 @@ namespace CryptoExchange.Net.Clients
             string? topic = null,
             int individualSubscriptionCount = 1)
         {
-            var socketQuery = _socketConnections.Where(s => s.Value.Tag.TrimEnd('/') == address.TrimEnd('/')
-                                                      && s.Value.ApiClient.GetType() == GetType()
-                                                      && (AllowTopicsOnTheSameConnection || !s.Value.Topics.Contains(topic)))
-                                                .Select(x => x.Value)
-                                                .ToList();
+            var socketQuery = _socketConnections.Where(s => ConnectionCanBeUsedFor(s.Value, address, authenticated, topic)).Select(x => x.Value); // Don't ToList this so the query is executed again when called
 
             // If all current socket connections are reconnecting or resubscribing wait for that to finish as we can probably use the existing connection
             var delayStart = DateTime.UtcNow;
             var delayed = false;
-            while (socketQuery.Count >= 1 && socketQuery.All(x => x.Status == SocketStatus.Reconnecting || x.Status == SocketStatus.Resubscribing))
+            while (socketQuery.Count() >= 1 && socketQuery.All(x => x.Status == SocketStatus.Reconnecting || x.Status == SocketStatus.Resubscribing))
             {
                 if (DateTime.UtcNow - delayStart > TimeSpan.FromSeconds(10))
                 {
-                    if (socketQuery.Count >= 1 && socketQuery.All(x => x.Status == SocketStatus.Reconnecting || x.Status == SocketStatus.Resubscribing))
+                    if (socketQuery.Count() >= 1 && socketQuery.All(x => x.Status == SocketStatus.Reconnecting || x.Status == SocketStatus.Resubscribing))
                     {
                         // If after this time we still trying to reconnect/reprocess there is some issue in the connection
                         _logger.TimeoutWaitingForReconnectingSocket();
-                        return new CallResult<SocketConnection>(new CantConnectError());
+                        return CallResult.Fail<SocketConnection>(new CantConnectError());
                     }
 
                     break;
@@ -650,68 +686,54 @@ namespace CryptoExchange.Net.Clients
                 try { await Task.Delay(50, ct).ConfigureAwait(false); } catch (Exception) { }
 
                 if (ct.IsCancellationRequested)
-                    return new CallResult<SocketConnection>(new CancellationRequestedError());
+                    return CallResult.Fail<SocketConnection>(new CancellationRequestedError());
             }
 
             if (delayed)
                 _logger.WaitedForReconnectingSocket((long)(DateTime.UtcNow - delayStart).TotalMilliseconds);
 
             socketQuery = socketQuery.Where(s => (s.Status == SocketStatus.None || s.Status == SocketStatus.Connected)                                                     
-                                                && (s.Authenticated == authenticated || !authenticated)
+                                                && (s.Authenticated == authenticated || !authenticated || UsePublicConnectionForAuth)
                                                 && s.Connected).ToList();
 
-            SocketConnection? connection;
-            if (!dedicatedRequestConnection)
-            {
-                connection = socketQuery.Where(s => !s.DedicatedRequestConnection.IsDedicatedRequestConnection).OrderBy(s => s.UserSubscriptionCount).FirstOrDefault();
-            }
-            else
+            bool maxConnectionsReached = _socketConnections.Count >= (ApiOptions.MaxSocketConnections ?? ClientOptions.MaxSocketConnections);
+            SocketConnection? connection = null;
+            if (dedicatedRequestConnection)
             {
                 connection = socketQuery.Where(s => s.DedicatedRequestConnection.IsDedicatedRequestConnection).FirstOrDefault();
                 if (connection != null && !connection.DedicatedRequestConnection.Authenticated)
                     // Mark dedicated request connection as authenticated if the request is authenticated
                     connection.DedicatedRequestConnection.Authenticated = authenticated;
-
-                if (connection == null)
-                    // Fall back to an existing connection if there is no dedicated request connection available
-                    connection = socketQuery.OrderBy(s => s.UserSubscriptionCount).FirstOrDefault();
             }
 
-            bool maxConnectionsReached = _socketConnections.Count >= (ApiOptions.MaxSocketConnections ?? ClientOptions.MaxSocketConnections);
-            if (connection != null)
+            if (connection == null)
             {
-                bool lessThanBatchSubCombineTarget = connection.UserSubscriptionCount < ClientOptions.SocketSubscriptionsCombineTarget;
-                bool lessThanIndividualSubCombineTarget = connection.Subscriptions.Sum(x => x.IndividualSubscriptionCount) < ClientOptions.SocketIndividualSubscriptionCombineTarget;
-
-                if ((lessThanBatchSubCombineTarget && lessThanIndividualSubCombineTarget)
-                    || maxConnectionsReached) 
-                {
-                    // Use existing socket if it has less than target connections OR it has the least connections and we can't make new
-                    // If there is a max subscriptions per connection limit also only use existing if the new subscription doesn't go over the limit
-                    if (MaxIndividualSubscriptionsPerConnection == null)
-                        return new CallResult<SocketConnection>(connection);
-                                        
-                    var currentCount = connection.Subscriptions.Sum(x => x.IndividualSubscriptionCount);
-                    if (currentCount + individualSubscriptionCount <= MaxIndividualSubscriptionsPerConnection)
-                        return new CallResult<SocketConnection>(connection);
-                }
+                // Use an eligible non-dedicated connection for subscriptions, or as fallback when no dedicated request connection is available
+                connection = socketQuery
+                    .Where(s => !s.DedicatedRequestConnection.IsDedicatedRequestConnection)
+                    .Where(s => IsConnectionEligible(s, individualSubscriptionCount, maxConnectionsReached))
+                    .OrderBy(s => s.UserSubscriptionCount)
+                    .FirstOrDefault();
             }
 
+            if (connection != null)
+                return CallResult.Ok(connection);
+
             if (maxConnectionsReached)
-                return new CallResult<SocketConnection>(new InvalidOperationError("Max amount of socket connections reached"));
+                return CallResult.Fail<SocketConnection>(new InvalidOperationError("Max amount of socket connections reached"));
 
             var connectionAddress = await GetConnectionUrlAsync(address, authenticated).ConfigureAwait(false);
-            if (!connectionAddress)
+            if (!connectionAddress.Success)
             {
-                _logger.FailedToDetermineConnectionUrl(connectionAddress.Error?.ToString());
-                return connectionAddress.As<SocketConnection>(null);
+                _logger.FailedToDetermineConnectionUrl(connectionAddress.Error.ToString());
+                return CallResult.Fail<SocketConnection>(connectionAddress.Error);
             }
 
             if (connectionAddress.Data != address)
                 _logger.ConnectionAddressSetTo(connectionAddress.Data!);
 
             // Create new socket connection
-            var socketConnection = new SocketConnection(_logger, SocketFactory, GetWebSocketParameters(connectionAddress.Data!), this, address);
+            var socketConnection = new SocketConnection(_logger, SocketFactory, GetWebSocketParameters(connectionAddress.Data!), this);
             socketConnection.ConnectRateLimitedAsync += HandleConnectRateLimitedAsync;
             if (dedicatedRequestConnection)
             {
@@ -728,7 +750,7 @@ namespace CryptoExchange.Net.Clients
             foreach (var systemSubscription in systemSubscriptions)
                 socketConnection.AddSubscription(systemSubscription);
 
-            return new CallResult<SocketConnection>(socketConnection);
+            return CallResult.Ok(socketConnection);
         }
 
 
@@ -745,21 +767,38 @@ namespace CryptoExchange.Net.Clients
             CancellationToken ct)
         {
             var connectionAddress = await GetConnectionUrlAsync(address, false).ConfigureAwait(false);
-            if (!connectionAddress)
+            if (!connectionAddress.Success)
             {
-                _logger.FailedToDetermineConnectionUrl(connectionAddress.Error?.ToString());
-                return connectionAddress.As<HighPerfSocketConnection<TUpdateType>>(null);
+                _logger.FailedToDetermineConnectionUrl(connectionAddress.Error.ToString());
+                return CallResult.Fail<HighPerfSocketConnection<TUpdateType>>(connectionAddress.Error);
             }
 
             if (connectionAddress.Data != address)
                 _logger.ConnectionAddressSetTo(connectionAddress.Data!);
 
             // Create new socket connection
-            var socketConnection = connectionFactory.CreateHighPerfConnection<TUpdateType>(_logger, SocketFactory, GetWebSocketParameters(connectionAddress.Data!), this, address);
+            var socketConnection = connectionFactory.CreateHighPerfConnection<TUpdateType>(_logger, SocketFactory, GetWebSocketParameters(connectionAddress.Data!), this);
             foreach (var ptg in PeriodicTaskRegistrations)
                 socketConnection.QueryPeriodic(ptg.Identifier, ptg.Interval, (con) => ptg.QueryDelegate(con).Request);
 
-            return new CallResult<HighPerfSocketConnection<TUpdateType>>(socketConnection);
+            return CallResult.Ok(socketConnection);
+        }
+
+        private bool IsConnectionEligible(SocketConnection socketConnection, int individualSubscriptionCount, bool maxConnectionsReached)
+        {
+            var currentIndividualSubscriptionCount = socketConnection.Subscriptions.Sum(x => x.IndividualSubscriptionCount);
+            bool lessThanBatchSubCombineTarget = socketConnection.UserSubscriptionCount < ClientOptions.SocketSubscriptionsCombineTarget;
+            // Include the incoming batch so batched subscriptions cannot overshoot the configured socket target.
+            bool lessThanIndividualSubCombineTarget = currentIndividualSubscriptionCount + individualSubscriptionCount <= ClientOptions.SocketIndividualSubscriptionCombineTarget;
+
+            if ((!lessThanBatchSubCombineTarget || !lessThanIndividualSubCombineTarget)
+                && !maxConnectionsReached)
+            {
+                return false;
+            }
+
+            return MaxIndividualSubscriptionsPerConnection == null
+                || currentIndividualSubscriptionCount + individualSubscriptionCount <= MaxIndividualSubscriptionsPerConnection;
         }
 
         /// <summary>
@@ -793,7 +832,7 @@ namespace CryptoExchange.Net.Clients
         protected virtual async Task<CallResult> ConnectSocketAsync(ISocketConnection socketConnection, CancellationToken ct)
         {
             var connectResult = await socketConnection.ConnectAsync(ct).ConfigureAwait(false);
-            if (connectResult)
+            if (connectResult.Success)
             {
                 if (socketConnection is SocketConnection sc)
                     _socketConnections.TryAdd(socketConnection.SocketId, sc);
@@ -819,6 +858,8 @@ namespace CryptoExchange.Net.Clients
                 ReconnectInterval = ClientOptions.ReconnectInterval,
                 RateLimiter = ClientOptions.RateLimiterEnabled ? RateLimiter : null,
                 RateLimitingBehavior = ClientOptions.RateLimitingBehaviour,
+                RateLimitAdmissionCallbackOptions = (def, weight) => ClientOptions.RateLimitAdmission?.Invoke(def, weight),
+                RateLimitAdmissionCallbackRequest = () => AdmissionOverride.Value,
                 Proxy = ClientOptions.Proxy,
                 Timeout = ApiOptions.SocketNoDataTimeout ?? ClientOptions.SocketNoDataTimeout,
                 ReceiveBufferSize = ClientOptions.ReceiveBufferSize,
@@ -877,7 +918,7 @@ namespace CryptoExchange.Net.Clients
 
             _logger.UnsubscribingAll(sum);
             var tasks = new List<Task>();
-            
+
             var socketList = _socketConnections.Values;
             foreach (var connection in socketList)
             {
@@ -916,15 +957,15 @@ namespace CryptoExchange.Net.Clients
             foreach (var item in DedicatedConnectionConfigs)
             {
                 var socketResult = await GetSocketConnection(item.SocketAddress, item.Authenticated, true, CancellationToken.None).ConfigureAwait(false);
-                if (!socketResult)
-                    return socketResult.AsDataless();
+                if (!socketResult.Success)
+                    return CallResult.Fail(socketResult.Error);
 
                 var connectResult = await ConnectIfNeededAsync(socketResult.Data, item.Authenticated, default).ConfigureAwait(false);
-                if (!connectResult)
-                    return new CallResult(connectResult.Error!);
+                if (!connectResult.Success)
+                    return CallResult.Fail(connectResult.Error!);
             }
 
-            return CallResult.SuccessResult;
+            return CallResult.Ok();
         }
 
         /// <summary>
@@ -1006,23 +1047,28 @@ namespace CryptoExchange.Net.Clients
         /// <summary>
         /// Dispose the client
         /// </summary>
-        public override void Dispose()
+        protected override void Dispose(bool disposing)
         {
-            _disposing = true;
-            var tasks = new List<Task>();
+            if (Interlocked.CompareExchange(ref _isDisposed, 1, 0) == 0)
             {
-                var socketList = _socketConnections.Values.Where(x => x.UserSubscriptionCount > 0 || x.Connected);
-                if (socketList.Any())
-                    _logger.DisposingSocketClient();
+                if (!disposing)
+                    return;
 
-                foreach (var connection in socketList)
+                var tasks = new List<Task>();
                 {
-                    tasks.Add(connection.CloseAsync());
-                }
-            }
+                    var socketList = _socketConnections.Values.Where(x => x.UserSubscriptionCount > 0 || x.Connected);
+                    if (socketList.Any())
+                        _logger.DisposingSocketClient();
 
-            semaphoreSlim?.Dispose();
-            base.Dispose();
+                    foreach (var connection in socketList)
+                    {
+                        tasks.Add(connection.CloseAsync());
+                    }
+                }
+
+                semaphoreSlim?.Dispose();
+                base.Dispose(disposing);
+            }
         }
 
         /// <summary>
@@ -1073,11 +1119,13 @@ namespace CryptoExchange.Net.Clients
         /// ctor
         /// </summary>
         protected SocketApiClient(
-            ILogger logger,
+            ILoggerFactory? loggerFactory,
+            string exchangeName,
             string baseAddress,
             SocketExchangeOptions<TEnvironment> options,
             SocketApiOptions apiOptions) : base(
-                logger,
+                loggerFactory,
+                exchangeName,
                 baseAddress,
                 options,
                 apiOptions)
@@ -1103,11 +1151,13 @@ namespace CryptoExchange.Net.Clients
         /// ctor
         /// </summary>
         protected SocketApiClient(
-            ILogger logger,
+            ILoggerFactory? loggerFactory,
+            string exchangeName,
             string baseAddress,
             SocketExchangeOptions<TEnvironment, TApiCredentials> options,
             SocketApiOptions apiOptions) : base(
-                logger,
+                loggerFactory,
+                exchangeName,
                 baseAddress,
                 options,
                 apiOptions)
@@ -1134,13 +1184,18 @@ namespace CryptoExchange.Net.Clients
         where TApiCredentials : ApiCredentials
         where TEnvironment : TradeEnvironment
     {
-
-        private bool _authProviderInitialized = false;
-        private TAuthenticationProvider? _authenticationProvider;
+        /// <summary>
+        /// Auth provider initialized field
+        /// </summary>
+        protected bool _authProviderInitialized = false;
+        /// <summary>
+        /// Auth provider field
+        /// </summary>
+        protected TAuthenticationProvider? _authenticationProvider;
         /// <summary>
         /// The authentication provider for this API client. (null if no credentials are set)
         /// </summary>
-        public TAuthenticationProvider? AuthenticationProvider
+        public virtual TAuthenticationProvider? AuthenticationProvider
         {
             get
             {
@@ -1154,7 +1209,7 @@ namespace CryptoExchange.Net.Clients
 
                 return _authenticationProvider;
             }
-            internal set => _authenticationProvider = value;
+            protected internal set => _authenticationProvider = value;
         }
 
         /// <inheritdoc />
@@ -1164,11 +1219,13 @@ namespace CryptoExchange.Net.Clients
         /// ctor
         /// </summary>
         protected SocketApiClient(
-            ILogger logger,
+            ILoggerFactory? loggerFactory,
+            string exchangeName,
             string baseAddress,
             SocketExchangeOptions<TEnvironment, TApiCredentials> options,
             SocketApiOptions apiOptions) : base(
-                logger,
+                loggerFactory,
+                exchangeName,
                 baseAddress,
                 options,
                 apiOptions)

CryptoExchange.Net/Clients/UserClientProvider.cs

@@ -0,0 +1,212 @@
+using CryptoExchange.Net.Authentication;
+using CryptoExchange.Net.Interfaces.Clients;
+using CryptoExchange.Net.Objects;
+using CryptoExchange.Net.Objects.Options;
+using CryptoExchange.Net.SharedApis;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+using System;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Net.Http;
+using System.Text;
+
+namespace CryptoExchange.Net.Clients
+{
+    /// <inheritdoc />
+    public abstract class UserClientProvider<TRestClient, TRestOptions, TCredentials, TEnvironment>
+        where TRestClient : IRestClient<TCredentials>
+        where TRestOptions : RestExchangeOptions<TEnvironment, TCredentials>, new()
+        where TCredentials : ApiCredentials
+        where TEnvironment : TradeEnvironment
+    {
+        private ConcurrentDictionary<string, TRestClient> _restClients = new ConcurrentDictionary<string, TRestClient>();
+        private readonly IOptions<TRestOptions> _restOptions;
+        private readonly HttpClient _httpClient;
+        /// <summary>
+        /// Logger factory
+        /// </summary>
+        protected readonly ILoggerFactory? _loggerFactory;
+
+        /// <inheritdoc />
+        public abstract string ExchangeName { get; }
+
+        /// <summary>
+        /// ctor
+        /// </summary>
+        public UserClientProvider(
+            HttpClient? httpClient,
+            ILoggerFactory? loggerFactory,
+            IOptions<TRestOptions> restOptions)
+        {
+            _httpClient = httpClient ?? new HttpClient();
+            _httpClient.Timeout = restOptions.Value.RequestTimeout;
+            _loggerFactory = loggerFactory;
+            _restOptions = restOptions;
+        }
+
+        private IOptions<TRestOptions> SetRestEnvironment(IOptions<TRestOptions> options, TEnvironment? environment)
+        {
+            if (environment == null)
+                return options;
+
+            var newRestClientOptions = new TRestOptions();
+            options.Value.Set(newRestClientOptions);
+            newRestClientOptions.Environment = environment;
+            return Options.Create(newRestClientOptions);
+        }
+
+        /// <inheritdoc />
+        public virtual void InitializeUserClient(string userIdentifier, TCredentials credentials, TEnvironment? environment = null)
+        {
+            CreateRestClient(userIdentifier, credentials, environment);
+        }
+
+        /// <inheritdoc />
+        public TRestClient GetRestClient(string userIdentifier, TCredentials? credentials = null, TEnvironment? environment = null)
+        {
+            if (!_restClients.TryGetValue(userIdentifier, out var client) || client.Disposed)
+                client = CreateRestClient(userIdentifier, credentials, environment);
+
+            return client;
+        }
+
+        private TRestClient CreateRestClient(string userIdentifier, TCredentials? credentials, TEnvironment? environment)
+        {
+            var clientRestOptions = SetRestEnvironment(_restOptions, environment);
+            var client = ConstructRestClient(_httpClient, _loggerFactory, clientRestOptions);
+            if (credentials != null)
+            {
+                _restClients[userIdentifier] = client;
+                client.SetApiCredentials(credentials);
+            }
+            return client;
+        }
+
+        /// <summary>
+        /// Constructs a new instance of the rest client
+        /// </summary>
+        protected abstract TRestClient ConstructRestClient(
+            HttpClient client,
+            ILoggerFactory? loggerFactory,
+            IOptions<TRestOptions> options);
+
+        /// <inheritdoc />
+        public virtual void ClearUserClients(string userIdentifier)
+        {
+            _restClients.TryRemove(userIdentifier, out var restClient);
+            restClient?.Dispose();
+        }
+
+        /// <inheritdoc />
+        public virtual void Clear()
+        {
+            foreach (var client in _restClients.Values)
+                client.Dispose();
+            _restClients.Clear();
+        }
+
+        /// <summary>
+        /// Applies the provided options delegate to a new instance of the specified type.
+        /// </summary>
+        protected static T ApplyOptionsDelegate<T>(Action<T>? del) where T : new()
+        {
+            var opts = new T();
+            del?.Invoke(opts);
+            return opts;
+        }
+    }
+
+    /// <inheritdoc />
+    public abstract class UserClientProvider<TRestClient, TSocketClient, TRestOptions, TSocketOptions, TCredentials, TEnvironment>
+        : UserClientProvider<TRestClient, TRestOptions, TCredentials, TEnvironment>
+        where TRestClient : IRestClient<TCredentials>
+        where TSocketClient : ISocketClient<TCredentials>
+        where TRestOptions : RestExchangeOptions<TEnvironment, TCredentials>, new()
+        where TSocketOptions : SocketExchangeOptions<TEnvironment, TCredentials>, new()
+        where TCredentials : ApiCredentials
+        where TEnvironment : TradeEnvironment
+    {
+        private ConcurrentDictionary<string, TSocketClient> _socketClients = new ConcurrentDictionary<string, TSocketClient>();
+        private readonly IOptions<TSocketOptions> _socketOptions;
+
+
+        /// <summary>
+        /// ctor
+        /// </summary>
+        public UserClientProvider(
+            HttpClient? httpClient,
+            ILoggerFactory? loggerFactory,
+            IOptions<TRestOptions> restOptions,
+            IOptions<TSocketOptions> socketOptions)
+            : base(httpClient, loggerFactory, restOptions)
+        {
+            _socketOptions = socketOptions;
+        }
+
+        private IOptions<TSocketOptions> SetSocketEnvironment(IOptions<TSocketOptions> options, TEnvironment? environment)
+        {
+            if (environment == null)
+                return options;
+
+            var newSocketClientOptions = new TSocketOptions();
+            options.Value.Set(newSocketClientOptions);
+            newSocketClientOptions.Environment = environment;
+            return Options.Create(newSocketClientOptions);
+        }
+
+        /// <inheritdoc />
+        public override void InitializeUserClient(string userIdentifier, TCredentials credentials, TEnvironment? environment = null)
+        {
+            base.InitializeUserClient(userIdentifier, credentials, environment);
+            CreateSocketClient(userIdentifier, credentials, environment);
+        }
+
+        /// <inheritdoc />
+        public TSocketClient GetSocketClient(string userIdentifier, TCredentials? credentials = null, TEnvironment? environment = null)
+        {
+            if (!_socketClients.TryGetValue(userIdentifier, out var client) || client.Disposed)
+                client = CreateSocketClient(userIdentifier, credentials, environment);
+
+            return client;
+        }
+
+        private TSocketClient CreateSocketClient(string userIdentifier, TCredentials? credentials, TEnvironment? environment)
+        {
+            var clientSocketOptions = SetSocketEnvironment(_socketOptions, environment);
+            var client = ConstructSocketClient(_loggerFactory, clientSocketOptions);
+            if (credentials != null)
+            {
+                _socketClients[userIdentifier] = client;
+                client.SetApiCredentials(credentials);
+            }
+            return client;
+        }
+
+        /// <summary>
+        /// Constructs a new instance of the socket client
+        /// </summary>
+        protected abstract TSocketClient ConstructSocketClient(
+            ILoggerFactory? loggerFactory,
+            IOptions<TSocketOptions> options);
+
+        /// <inheritdoc />
+        public override void ClearUserClients(string userIdentifier)
+        {
+            base.ClearUserClients(userIdentifier);
+
+            _socketClients.TryRemove(userIdentifier, out var socketClient);
+            socketClient?.Dispose();
+        }
+
+        /// <inheritdoc />
+        public override void Clear()
+        {
+            base.Clear();
+
+            foreach (var client in _socketClients.Values)
+                client.Dispose();
+            _socketClients.Clear();
+        }
+    }
+}

CryptoExchange.Net/Converters/SystemTextJson/ArrayConverter.cs

@@ -173,6 +173,9 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
 
                     if (targetType.IsAssignableFrom(value?.GetType()))
                         attribute.PropertyInfo.SetValue(result, value);
+                    else if (value is string stringValue && targetType == typeof(decimal))
+                        // Convert.ChangeType doesn't accept scientific notation, which some exchanges use for small values ("4.803E-5")
+                        attribute.PropertyInfo.SetValue(result, ExchangeHelpers.ParseDecimal(stringValue));
                     else
                         attribute.PropertyInfo.SetValue(result, value == null ? null : Convert.ChangeType(value, targetType, CultureInfo.InvariantCulture));
                 }

CryptoExchange.Net/Converters/SystemTextJson/BoolConverter.cs

@@ -56,14 +56,26 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
             if (reader.TokenType == JsonTokenType.False)
                 return false;
 
-            var value = reader.TokenType switch
+            if (reader.TokenType == JsonTokenType.Number)
             {
-                JsonTokenType.String => reader.GetString(),
-                JsonTokenType.Number => reader.GetInt16().ToString(),
-                _ => null
-            };
+                var number = reader.GetInt16();
+                if (number >= 1)
+                    return true;
 
-            value = value?.ToLowerInvariant().Trim();
+                return false;
+            }
+
+            if (reader.TokenType == JsonTokenType.Null)
+            {
+                if (typeToConvert == typeof(bool))
+                    LibraryHelpers.StaticLogger?.LogWarning("Received null bool value, but property type is not a nullable bool. Resolver: {Resolver}", options.TypeInfoResolver?.GetType()?.Name);
+                return default;
+            }
+
+            if (reader.TokenType != JsonTokenType.String)
+                throw new SerializationException($"Can't convert bool value for token type {reader.TokenType}");
+            
+            var value = reader.GetString()?.ToLowerInvariant().Trim();
             if (string.IsNullOrEmpty(value))
             {
                 if (typeToConvert == typeof(bool))
@@ -73,12 +85,14 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
 
             switch (value)
             {
+                case "enabled":
                 case "true":
                 case "yes":
                 case "y":
                 case "1":
                 case "on":
                     return true;
+                case "disabled":
                 case "false":
                 case "no":
                 case "n":
@@ -88,7 +102,7 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
                     return false;
             }
 
-            throw new SerializationException($"Can't convert bool value {value}");
+            throw new SerializationException($"Can't convert bool value, unknown string value: {value}");
         }
 
     }

CryptoExchange.Net/Converters/SystemTextJson/DateTimeConverter.cs

@@ -16,17 +16,19 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
         private const long _ticksPerSecond = TimeSpan.TicksPerMillisecond * 1000;
         private const decimal _ticksPerMicrosecond = TimeSpan.TicksPerMillisecond / 1000m;
         private const decimal _ticksPerNanosecond = TimeSpan.TicksPerMillisecond / 1000m / 1000;
+        private static Type _dateTimeType = typeof(DateTime);
+        private static Type _nullableDateTimeType = typeof(DateTime?);
 
         /// <inheritdoc />
         public override bool CanConvert(Type typeToConvert)
         {
-            return typeToConvert == typeof(DateTime) || typeToConvert == typeof(DateTime?);
+            return typeToConvert == _dateTimeType || typeToConvert == _nullableDateTimeType;
         }
 
         /// <inheritdoc />
         public override JsonConverter CreateConverter(Type typeToConvert, JsonSerializerOptions options)
         {
-            return typeToConvert == typeof(DateTime) ? new DateTimeConverterInner() : new NullableDateTimeConverterInner();
+            return typeToConvert == _dateTimeType ? new DateTimeConverterInner() : new NullableDateTimeConverterInner();
         }
 
         private class NullableDateTimeConverterInner : JsonConverter<DateTime?>
@@ -68,7 +70,7 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
         {
             if (reader.TokenType == JsonTokenType.Null)
             {
-                if (typeToConvert == typeof(DateTime))
+                if (typeToConvert == _dateTimeType)
                     LibraryHelpers.StaticLogger?.LogWarning("DateTime value of null, but property is not nullable. Resolver: {Resolver}", options.TypeInfoResolver?.GetType()?.Name);
                 return default;
             }
@@ -76,7 +78,7 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
             if (reader.TokenType is JsonTokenType.Number)
             {
                 var decValue = reader.GetDecimal();
-                if (decValue == 0 || decValue < 0)
+                if (decValue <= 0)
                     return default;
 
                 return ParseFromDecimal(decValue);
@@ -86,8 +88,7 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
                 var stringValue = reader.GetString();
                 if (string.IsNullOrWhiteSpace(stringValue)
                     || stringValue!.Equals("-1", StringComparison.Ordinal)
-                    || stringValue!.Equals("0001-01-01T00:00:00Z", StringComparison.OrdinalIgnoreCase)
-                    || decimal.TryParse(stringValue, out var decVal) && decVal == 0)
+                    || stringValue!.Equals("0001-01-01T00:00:00Z", StringComparison.OrdinalIgnoreCase))
                 {
                     return default;
                 }
@@ -124,7 +125,7 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
         /// <summary>
         /// Parse a string value to datetime
         /// </summary>
-        public static DateTime ParseFromString(string stringValue, string? resolverName)
+        public static DateTime? ParseFromString(string stringValue, string? resolverName)
         {
             if (stringValue!.Length == 12 && stringValue.StartsWith("202", StringComparison.OrdinalIgnoreCase))
             {
@@ -197,6 +198,9 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
                 return new DateTime(year, month, day, 0, 0, 0, DateTimeKind.Utc);
             }
 
+            if (stringValue.EndsWith("+00:00:00"))
+                return DateTime.Parse(stringValue.Substring(0, stringValue.Length - 9), CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal);
+
             return DateTime.Parse(stringValue, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal);
         }
 

CryptoExchange.Net/Converters/SystemTextJson/EnumConverter.cs

@@ -67,25 +67,14 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
 #endif
          : JsonConverter<T>, INullableConverterFactory where T : struct, Enum
     {
-        class EnumMapping
-        {
-            public T Value { get; set; }
-            public string StringValue { get; set; }
-
-            public EnumMapping(T value, string stringValue)
-            {
-                Value = value;
-                StringValue = stringValue;
-            }
-        }
 
 #if NET8_0_OR_GREATER
-        private static FrozenSet<EnumMapping>? _mappingToEnum = null;
+        private static FrozenDictionary<string, T>? _mappingToEnum = null;
         private static FrozenDictionary<T, string>? _mappingToString = null;
 
         private static bool RunOptimistic => true;
 #else
-        private static List<EnumMapping>? _mappingToEnum = null;
+        private static Dictionary<string, T>? _mappingToEnum = null;
         private static Dictionary<T, string>? _mappingToString = null;
         
         // In NetStandard the `ValueTextEquals` method used is slower than just string comparing
@@ -205,7 +194,7 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
                     if (!_unknownValuesWarned.Contains(stringValue))
                     {
                         _unknownValuesWarned.Add(stringValue!);
-                        LibraryHelpers.StaticLogger?.LogWarning($"Cannot map enum value. EnumType: {_enumType.FullName}, Value: {stringValue}, Known values: [{string.Join(", ", _mappingToEnum!.Select(m => $"{m.StringValue}: {m.Value}"))}]. If you think {stringValue} should be added please open an issue on the Github repo");
+                        LibraryHelpers.StaticLogger?.LogWarning($"Cannot map enum value. EnumType: {_enumType.FullName}, Value: {stringValue}, Known values: [{string.Join(", ", _mappingToEnum!.Select(m => $"{m.Key}: {m.Value}"))}]. If you think {stringValue} should be added please open an issue on the Github repo");
                     }
                 }
 
@@ -217,7 +206,7 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
                 if (!_notOptimalValuesWarned.Contains(stringValue))
                 {
                     _notOptimalValuesWarned.Add(stringValue!);
-                    LibraryHelpers.StaticLogger?.LogTrace($"Enum mapping sub-optimal. EnumType: {_enumType.FullName}, Value: {stringValue}, Known values: [{string.Join(", ", _mappingToEnum!.Select(m => $"{m.StringValue}: {m.Value}"))}]");
+                    LibraryHelpers.StaticLogger?.LogTrace($"Enum mapping sub-optimal. EnumType: {_enumType.FullName}, Value: {stringValue}, Known values: [{string.Join(", ", _mappingToEnum!.Select(m => $"{m.Key}: {m.Value}"))}]");
                 }
             }
 
@@ -252,7 +241,7 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
             optimisticCheckDone = true;
             foreach (var item in _mappingToEnum!)
             {
-                if (reader.ValueTextEquals(item.StringValue))
+                if (reader.ValueTextEquals(item.Key))
                     return item.Value;
             }
 
@@ -261,43 +250,44 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
 
         private static bool GetValue(string value, bool optimisticCheckDone, out T? result)
         {
-            if (_mappingToEnum != null)
+            if (_mappingToEnum == null)
+                throw new InvalidOperationException("Enum mapping not initialized");
+
+            T? mapping = null;
+            // If we tried the optimistic path first we already know its not case match
+            if (!optimisticCheckDone) 
             {
-                EnumMapping? mapping = null;
-                // If we tried the optimistic path first we already know its not case match
-                if (!optimisticCheckDone) 
+                // Try match on full equals
+                foreach (var item in _mappingToEnum)
                 {
-                    // Try match on full equals
-                    foreach (var item in _mappingToEnum)
+                    if (item.Key.Equals(value, StringComparison.Ordinal))
                     {
-                        if (item.StringValue.Equals(value, StringComparison.Ordinal))
-                        {
-                            mapping = item;
-                            break;
-                        }
+                        mapping = item.Value;
+                        break;
                     }
                 }
-
-                // If not found, try matching ignoring case
-                if (mapping == null)
-                {
-                    foreach (var item in _mappingToEnum)
-                    {
-                        if (item.StringValue.Equals(value, StringComparison.OrdinalIgnoreCase))
-                        {
-                            mapping = item;
-                            break;
-                        }
-                    }
-                }
-
-                if (mapping != null)
-                {
-                    result = mapping.Value;
-                    return true;
-                }
             }
 
+            // If not found, try matching ignoring case
+            if (mapping == null)
+            {
+                foreach (var item in _mappingToEnum)
+                {
+                    if (item.Key.Equals(value, StringComparison.OrdinalIgnoreCase))
+                    {
+                        mapping = item.Value;
+                        break;
+                    }
+                }
+            }
+
+            if (mapping != null)
+            {
+                result = mapping;
+                return true;
+            }
+            
+
             if (_hasFlagsAttribute)
             {
                 var intValue = int.Parse(value);
@@ -345,26 +335,21 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
 
         private static void CreateMapping()
         {
-            var mappingStringToEnum = new List<EnumMapping>();
+            var mappingStringToEnum = new Dictionary<string, T>();
             var mappingEnumToString = new Dictionary<T, string>();
 
 #pragma warning disable IL2080
-            var enumMembers = _enumType.GetFields();
+            var enumMembers = _enumType.GetFields(BindingFlags.Public | BindingFlags.Static);
 #pragma warning restore IL2080
             foreach (var member in enumMembers)
             {
+                var enumVal = (T)member.GetValue(null)!;
                 var maps = member.GetCustomAttributes(typeof(MapAttribute), false);
                 foreach (MapAttribute attribute in maps)
                 {
                     foreach (var value in attribute.Values)
                     {
-#if NET8_0_OR_GREATER
-                        var enumVal = Enum.Parse<T>(member.Name);
-#else
-                        var enumVal = (T)Enum.Parse(_enumType, member.Name);
-#endif
-
-                        mappingStringToEnum.Add(new EnumMapping(enumVal, value));
+                        mappingStringToEnum.Add(value, enumVal);
                         if (!mappingEnumToString.ContainsKey(enumVal))
                             mappingEnumToString.Add(enumVal, value);
                     }
@@ -372,7 +357,7 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
             }
 
 #if NET8_0_OR_GREATER
-            _mappingToEnum = mappingStringToEnum.ToFrozenSet();
+            _mappingToEnum = mappingStringToEnum.ToFrozenDictionary();
             _mappingToString = mappingEnumToString.ToFrozenDictionary();
 #else
             _mappingToEnum = mappingStringToEnum;
@@ -411,33 +396,20 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
             if (_mappingToEnum == null)
                 CreateMapping();
 
-            EnumMapping? mapping = null;
             // Try match on full equals
             foreach(var item in _mappingToEnum!)
             {
-                if (item.StringValue.Equals(value, StringComparison.Ordinal))
-                {
-                    mapping = item;
-                    break;
-                }
+                if (item.Key.Equals(value, StringComparison.Ordinal))
+                    return item.Value;
             }
 
             // If not found, try matching ignoring case
-            if (mapping == null)
+            foreach (var item in _mappingToEnum)
             {
-                foreach (var item in _mappingToEnum)
-                {
-                    if (item.StringValue.Equals(value, StringComparison.OrdinalIgnoreCase))
-                    {
-                        mapping = item;
-                        break;
-                    }
-                }
+                if (item.Key.Equals(value, StringComparison.OrdinalIgnoreCase))
+                    return item.Value;
             }
 
-            if (mapping != null)
-                return mapping.Value;
-
             try
             {
 #if NET8_0_OR_GREATER

CryptoExchange.Net/Converters/SystemTextJson/MessageHandlers/JsonRestMessageHandler.cs

@@ -88,7 +88,7 @@ namespace CryptoExchange.Net.Converters.SystemTextJson.MessageHandlers
                     stream.Seek(0, SeekOrigin.Begin);
                     var written = new StreamReader(stream).ReadBlock(dataSnippet, 0, _errorResponseSnippetLimit);
                     var data = new string(dataSnippet, 0, written);
-                    errorMsg += $": {data}";
+                    errorMsg += $": {(string.IsNullOrEmpty(data) ? "(empty)" : data)}";
                     if (data.Length == _errorResponseSnippetLimit)
                         errorMsg += " (truncated)";
                 }

CryptoExchange.Net/CryptoExchange.Net.csproj

@@ -6,9 +6,9 @@
     <PackageId>CryptoExchange.Net</PackageId>
     <Authors>JKorf</Authors>
     <Description>CryptoExchange.Net is a base library which is used to implement different cryptocurrency (exchange) API's. It provides a standardized way of implementing different API's, which results in a very similar experience for users of the API implementations.</Description>
-    <PackageVersion>11.1.0</PackageVersion>
-    <AssemblyVersion>11.1.0</AssemblyVersion>
-    <FileVersion>11.1.0</FileVersion>
+    <PackageVersion>13.0.0</PackageVersion>
+    <AssemblyVersion>13.0.0</AssemblyVersion>
+    <FileVersion>13.0.0</FileVersion>
     <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
     <PackageTags>OKX;OKX.Net;Mexc;Mexc.Net;Kucoin;Kucoin.Net;Kraken;Kraken.Net;Huobi;Huobi.Net;CoinEx;CoinEx.Net;Bybit;Bybit.Net;Bitget;Bitget.Net;Bitfinex;Bitfinex.Net;Binance;Binance.Net;CryptoCurrency;CryptoCurrency Exchange;CryptoExchange.Net</PackageTags>
     <RepositoryType>git</RepositoryType>

CryptoExchange.Net/ExchangeHelpers.cs

@@ -311,16 +311,16 @@ namespace CryptoExchange.Net
         /// <param name="request">The request parameters</param>
         /// <param name="ct">Cancellation token</param>
         /// <returns></returns>
-        public static async IAsyncEnumerable<ExchangeWebResult<T[]>> ExecutePages<T, U>(Func<U, PageRequest?, CancellationToken, Task<ExchangeWebResult<T[]>>> paginatedFunc, U request, [EnumeratorCancellation]CancellationToken ct = default)
+        public static async IAsyncEnumerable<HttpResult<T[]>> ExecutePages<T, U>(Func<U, PageRequest?, CancellationToken, Task<HttpResult<T[]>>> paginatedFunc, U request, [EnumeratorCancellation]CancellationToken ct = default)
         {
             var result = new List<T>();
-            ExchangeWebResult<T[]> batch;
+            HttpResult<T[]> batch;
             PageRequest? nextPageToken = null;
             while (true)
             {
                 batch = await paginatedFunc(request, nextPageToken, ct).ConfigureAwait(false);
                 yield return batch;
-                if (!batch || ct.IsCancellationRequested)
+                if (!batch.Success || ct.IsCancellationRequested)
                     break;
 
                 result.AddRange(batch.Data);
@@ -399,8 +399,8 @@ namespace CryptoExchange.Net
         /// <param name="asyncHandler">The async update handler</param>
         /// <param name="maxQueuedItems">The max number of updates to be queued up. When happens when the queue is full and a new write is attempted can be specified with <see>fullMode</see></param>
         /// <param name="fullBehavior">What should happen if the queue contains <see>maxQueuedItems</see> pending updates. If no max is set this setting is ignored</param>
-        public static async Task<CallResult<UpdateSubscription>> ProcessQueuedAsync<T>(
-            Func<Action<DataEvent<T>>, Task<CallResult<UpdateSubscription>>> subscribeCall,
+        public static async Task<WebSocketResult<UpdateSubscription>> ProcessQueuedAsync<T>(
+            Func<Action<DataEvent<T>>, Task<WebSocketResult<UpdateSubscription>>> subscribeCall,
             Func<DataEvent<T>, Task> asyncHandler,
             int? maxQueuedItems = null,
             QueueFullBehavior? fullBehavior = null)
@@ -408,7 +408,7 @@ namespace CryptoExchange.Net
             var processor = new ProcessQueue<DataEvent<T>>(asyncHandler, maxQueuedItems, fullBehavior);
             await processor.StartAsync().ConfigureAwait(false);
             var result = await subscribeCall(upd => processor.Write(upd)).ConfigureAwait(false);
-            if (!result)
+            if (!result.Success)
             {
                 await processor.StopAsync().ConfigureAwait(false);
                 return result;
@@ -473,7 +473,7 @@ namespace CryptoExchange.Net
             }, maxQueuedItems, fullBehavior);
             await processor.StartAsync().ConfigureAwait(false);
             var result = await subscribeCall(processor).ConfigureAwait(false);
-            if (!result)
+            if (!result.Success)
             {
                 await processor.StopAsync().ConfigureAwait(false);
                 return result;
@@ -499,7 +499,7 @@ namespace CryptoExchange.Net
                 return null;            
 
             // Try parse, only fails for these reasons:
-            // 1. string is null or empty
+            // 1. string is null or empty (already covered)
             // 2. value is larger or smaller than decimal max/min
             // 3. unparsable format
             if (decimal.TryParse(value, NumberStyles.Float, CultureInfo.InvariantCulture, out var decValue))
@@ -516,7 +516,7 @@ namespace CryptoExchange.Net
             if (string.Equals("Infinity", value, StringComparison.OrdinalIgnoreCase))
                 return decimal.MaxValue;
             else if(string.Equals("-Infinity", value, StringComparison.OrdinalIgnoreCase))
-                    return decimal.MinValue;
+                return decimal.MinValue;
 
             if (value!.Length > 27 && decimal.TryParse(value.Substring(0, 27), out var overflowValue))
             {

CryptoExchange.Net/ExchangeSymbolCache.cs

@@ -11,85 +11,92 @@ namespace CryptoExchange.Net
     /// </summary>
     public static class ExchangeSymbolCache
     {
-        private static ConcurrentDictionary<string, ExchangeInfo> _symbolInfos = new ConcurrentDictionary<string, ExchangeInfo>();
+        private static ConcurrentDictionary<string, ExchangeKeyedCache> _symbolInfos = new ConcurrentDictionary<string, ExchangeKeyedCache>();
 
         /// <summary>
         /// Update the cached symbol data for an exchange
         /// </summary>
         /// <param name="topicId">Id for the provided data</param>
+        /// <param name="environment">Trading environment</param>
+        /// <param name="key">Optional data set key</param>
         /// <param name="updateData">Symbol data</param>
-        public static void UpdateSymbolInfo(string topicId, SharedSpotSymbol[] updateData)
+        public static void UpdateSymbolInfo(string topicId, string environment, string? key, SharedSpotSymbol[] updateData)
         {
-            if(!_symbolInfos.TryGetValue(topicId, out var exchangeInfo))
+            var id = topicId + environment;
+            if(!_symbolInfos.TryGetValue(id, out var exchangeInfo))
             {
-                exchangeInfo = new ExchangeInfo(DateTime.UtcNow, updateData.ToDictionary(x => x.Name, x => x.SharedSymbol));                
-                _symbolInfos.TryAdd(topicId, exchangeInfo);
+                exchangeInfo = new ExchangeKeyedCache();                
+                _symbolInfos.TryAdd(id, exchangeInfo);
             }
 
-            if (DateTime.UtcNow - exchangeInfo.UpdateTime < TimeSpan.FromMinutes(60))
+            var keyedCache = exchangeInfo.Get(key);
+            if (keyedCache != null && DateTime.UtcNow - keyedCache.UpdateTime < TimeSpan.FromMinutes(60))
                 return;
 
-            _symbolInfos[topicId] = new ExchangeInfo(DateTime.UtcNow, updateData.ToDictionary(x => x.Name, x => x.SharedSymbol));
+            exchangeInfo.Set(key, new ExchangeInfo(DateTime.UtcNow, updateData.ToDictionary(x => x.Name, x => x)));
         }
 
         /// <summary>
         /// Whether the specific topic has been cached
         /// </summary>
         /// <param name="topicId">Id</param>
-        public static bool HasCached(string topicId)
+        /// <param name="environment">Trading environment</param>
+        /// <param name="key">Optional data set key</param>
+        public static bool HasCached(string topicId, string environment, string? key)
         {
-            if (!_symbolInfos.TryGetValue(topicId, out var exchangeInfo))
+            var id = topicId + environment;
+            if (!_symbolInfos.TryGetValue(id, out var exchangeInfo))
                 return false;
 
-            return exchangeInfo.Symbols.Count > 0;
+            return exchangeInfo.HasCached(key);
         }
 
         /// <summary>
         /// Whether a specific exchange(topic) support the provided symbol
         /// </summary>
         /// <param name="topicId">Id for the provided data</param>
+        /// <param name="environment">Trading environment</param>
+        /// <param name="key">Optional data set key</param>
         /// <param name="symbolName">The symbol name</param>
-        public static bool SupportsSymbol(string topicId, string symbolName)
+        public static bool SupportsSymbol(string topicId, string environment, string? key, string symbolName)
         {
-            if (!_symbolInfos.TryGetValue(topicId, out var exchangeInfo))
+            var id = topicId + environment;
+            if (!_symbolInfos.TryGetValue(id, out var exchangeInfo))
                 return false;
 
-            if (!exchangeInfo.Symbols.TryGetValue(symbolName, out var symbolInfo))
-                return false;
-
-            return true;
+            return exchangeInfo.SupportsSymbol(key, symbolName);
         }
 
         /// <summary>
         /// Whether a specific exchange(topic) support the provided symbol
         /// </summary>
         /// <param name="topicId">Id for the provided data</param>
+        /// <param name="environment">Trading environment</param>
+        /// <param name="key">Optional data set key</param>
         /// <param name="symbol">The symbol info</param>
-        public static bool SupportsSymbol(string topicId, SharedSymbol symbol)
+        public static bool SupportsSymbol(string topicId, string environment, string? key,  SharedSymbol symbol)
         {
-            if (!_symbolInfos.TryGetValue(topicId, out var exchangeInfo))
+            var id = topicId + environment;
+            if (!_symbolInfos.TryGetValue(id, out var exchangeInfo))
                 return false;
 
-            return exchangeInfo.Symbols.Any(x => 
-                x.Value.TradingMode == symbol.TradingMode 
-                && x.Value.BaseAsset == symbol.BaseAsset 
-                && x.Value.QuoteAsset == symbol.QuoteAsset);
+            return exchangeInfo.SupportsSymbol(key, symbol);
         }
 
         /// <summary>
         /// Get all symbols for a specific base asset
         /// </summary>
         /// <param name="topicId">Id for the provided data</param>
+        /// <param name="environment">Trading environment</param>
+        /// <param name="key">Optional data set key</param>
         /// <param name="baseAsset">Base asset name</param>
-        public static SharedSymbol[] GetSymbolsForBaseAsset(string topicId, string baseAsset)
+        public static SharedSymbol[] GetSymbolsForBaseAsset(string topicId, string environment, string? key, string baseAsset)
         {
-            if (!_symbolInfos.TryGetValue(topicId, out var exchangeInfo))
+            var id = topicId + environment;
+            if (!_symbolInfos.TryGetValue(id, out var exchangeInfo))
                 return [];
 
-            return exchangeInfo.Symbols
-                .Where(x => x.Value.BaseAsset.Equals(baseAsset, StringComparison.InvariantCultureIgnoreCase))
-                .Select(x => x.Value)
-                .ToArray();
+            return exchangeInfo.GetSymbolsForBaseAsset(key, baseAsset);
         }
 
         /// <summary>
@@ -97,29 +104,261 @@ namespace CryptoExchange.Net
         /// </summary>
         /// <param name="topicId">Id for the provided data</param>
         /// <param name="symbolName">Symbol name</param>
-        public static SharedSymbol? ParseSymbol(string topicId, string? symbolName)
+        /// <param name="environment">Trade environment</param>
+        /// <param name="key">Additional data set identification key</param>
+        public static SharedSymbol? ParseSymbol(string topicId, string environment, string? key, string? symbolName)
         {
             if (symbolName == null)
                 return null;
 
-            if (!_symbolInfos.TryGetValue(topicId, out var exchangeInfo))
+            var id = topicId + environment;
+            if (!_symbolInfos.TryGetValue(id, out var exchangeInfo))
                 return null;
 
-            if (!exchangeInfo.Symbols.TryGetValue(symbolName, out var symbolInfo))
-                return null;
-
-            return new SharedSymbol(symbolInfo.TradingMode, symbolInfo.BaseAsset, symbolInfo.QuoteAsset, symbolName)
-            {
-                DeliverTime = symbolInfo.DeliverTime
-            };
+            return exchangeInfo.ParseSymbol(key, symbolName);
         }
 
+        /// <summary>
+        /// Get a symbol catalog for a specific exchange(topic) and environment. Only available if <see cref="UpdateSymbolInfo(string, string, string?, SharedSpotSymbol[])"/> has been called previously.
+        /// </summary>
+        /// <param name="exchange">Exchange name</param>
+        /// <param name="topicId">Id for the provided data</param>
+        /// <param name="environmentName">Trade environment</param>
+        /// <param name="key">Additional data set identification key</param>
+        public static SharedSymbolCatalog? GetSymbolCatalog(string exchange, string topicId, string environmentName, string? key)
+        {
+            var id = topicId + environmentName;
+            if (!_symbolInfos.TryGetValue(id, out var exchangeInfo))
+                return null;
+
+            return exchangeInfo.GetSymbolCatalog(exchange, key);
+        }
+
+        class ExchangeKeyedCache
+        {
+            private ExchangeInfo? _noKeyCache;
+            private ConcurrentDictionary<string, ExchangeInfo> _keyedCache = new ConcurrentDictionary<string, ExchangeInfo>();
+
+            public ExchangeInfo? Get(string? key)
+            {
+                if (key == null)
+                    return _noKeyCache;
+
+                if (_keyedCache.TryGetValue(key, out var exchangeInfo))
+                    return exchangeInfo;
+
+                return null;
+            }
+
+            public void Set(string? key, ExchangeInfo exchangeInfo)
+            {
+                if (key == null)
+                    _noKeyCache = exchangeInfo;
+                else
+                    _keyedCache[key] = exchangeInfo;
+            }
+
+            public bool HasCached(string? key)
+            {
+                if (key == null)
+                {
+                    if (_noKeyCache?.Symbols.Count > 0)
+                        return true;
+
+                    foreach (var cache in _keyedCache.Values)
+                    {
+                        if (cache.Symbols.Count > 0)
+                            return true;
+                    }
+
+                    return false;
+                }
+
+                return _keyedCache.TryGetValue(key, out var exchangeInfo) && exchangeInfo.Symbols.Count > 0;
+            }
+
+            public SharedSymbol? ParseSymbol(string? key, string symbolName)
+            {
+                SharedSpotSymbol? symbolInfo = null;
+                if (key == null)
+                {
+                    if (_noKeyCache != null)
+                    {
+                        if (!_noKeyCache.Symbols.TryGetValue(symbolName, out symbolInfo))
+                            return null;
+
+                        return new SharedSymbol(symbolInfo.TradingMode, symbolInfo.BaseAsset, symbolInfo.QuoteAsset, symbolName)
+                        {
+                            DeliverTime = (symbolInfo as SharedFuturesSymbol)?.DeliveryTime
+                        };
+                    }
+
+                    foreach(var cache in _keyedCache.Values)
+                    {
+                        if (cache.Symbols.TryGetValue(symbolName, out symbolInfo))
+                        {
+                            return new SharedSymbol(symbolInfo.TradingMode, symbolInfo.BaseAsset, symbolInfo.QuoteAsset, symbolName)
+                            {
+                                DeliverTime = (symbolInfo as SharedFuturesSymbol)?.DeliveryTime
+                            };
+                        }
+                    }
+
+                    return null;
+                }
+
+                var hasKeyedSet = _keyedCache.TryGetValue(key, out var exchangeInfo);
+                if (!hasKeyedSet || exchangeInfo == null)
+                    return null;
+
+                if (exchangeInfo.Symbols.TryGetValue(symbolName, out symbolInfo))
+                {
+                    return new SharedSymbol(symbolInfo.TradingMode, symbolInfo.BaseAsset, symbolInfo.QuoteAsset, symbolName)
+                    {
+                        DeliverTime = (symbolInfo as SharedFuturesSymbol)?.DeliveryTime
+                    };
+                }
+
+                return null;
+            }
+
+            public bool SupportsSymbol(string? key, string symbolName)
+            {
+                if (key == null)
+                {
+                    if (_noKeyCache?.Symbols.ContainsKey(symbolName) == true)
+                        return true;
+
+                    foreach(var cache in _keyedCache.Values)
+                    {
+                        if (cache.Symbols.ContainsKey(symbolName))
+                            return true;
+                    }
+
+                    return false;
+                }
+
+                return _keyedCache.TryGetValue(key, out var exchangeInfo) && exchangeInfo.Symbols.ContainsKey(symbolName);
+            }
+
+            public bool SupportsSymbol(string? key, SharedSymbol symbol)
+            {
+                if (key == null)
+                {
+                    if (_noKeyCache?.Symbols.Any(x =>
+                        x.Value.TradingMode == symbol.TradingMode
+                        && x.Value.BaseAsset == symbol.BaseAsset
+                        && x.Value.QuoteAsset == symbol.QuoteAsset) == true)
+                    {
+                        return true;
+                    }
+
+                    foreach (var cache in _keyedCache.Values)
+                    {
+                        if (cache.Symbols.Any(x =>
+                            x.Value.TradingMode == symbol.TradingMode
+                            && x.Value.BaseAsset == symbol.BaseAsset
+                            && x.Value.QuoteAsset == symbol.QuoteAsset))
+                        {
+                            return true;
+                        }
+                    }
+
+                    return false;
+                }
+                    
+                return _keyedCache.TryGetValue(key, out var exchangeInfo) && exchangeInfo.Symbols.Any(x =>
+                    x.Value.TradingMode == symbol.TradingMode
+                    && x.Value.BaseAsset == symbol.BaseAsset
+                    && x.Value.QuoteAsset == symbol.QuoteAsset);
+            }
+
+            public SharedSymbol[] GetSymbolsForBaseAsset(string? key, string baseAsset)
+            {
+                if (key == null)
+                {
+                    if (_noKeyCache != null)
+                    {
+                        return _noKeyCache.Symbols
+                            .Where(x => x.Value.BaseAsset.Equals(baseAsset, StringComparison.InvariantCultureIgnoreCase))
+                            .Select(x => x.Value.SharedSymbol)
+                            .ToArray();
+                    }
+
+                    var result = new List<SharedSymbol>();
+                    foreach(var cache in _keyedCache.Values)
+                    {
+                        result.AddRange(cache.Symbols
+                            .Where(x => x.Value.BaseAsset.Equals(baseAsset, StringComparison.InvariantCultureIgnoreCase))
+                            .Select(x => x.Value.SharedSymbol));
+                    }
+
+                    return result.ToArray();
+                }
+
+                var hasKeyedSet = _keyedCache.TryGetValue(key, out var exchangeInfo);
+                if (!hasKeyedSet || exchangeInfo == null)
+                    return [];
+
+                return exchangeInfo.Symbols
+                    .Where(x => x.Value.BaseAsset.Equals(baseAsset, StringComparison.InvariantCultureIgnoreCase))
+                    .Select(x => x.Value.SharedSymbol)
+                    .ToArray();
+            }
+
+            internal SharedSymbolCatalog? GetSymbolCatalog(string exchange, string? key)
+            {
+                IEnumerable<SharedSpotSymbol> cachedSymbols;
+                if (key == null)
+                {
+                    if (_noKeyCache != null)
+                        cachedSymbols = _noKeyCache.Symbols.Values;
+                    else
+                        cachedSymbols = _keyedCache.Values.SelectMany(x => x.Symbols.Values);
+                }
+                else
+                {
+                    if (!_keyedCache.TryGetValue(key, out var exchangeInfo) || exchangeInfo == null)
+                        return null;
+
+                    cachedSymbols = exchangeInfo.Symbols.Values;
+                }
+
+                var assets = new Dictionary<string, SharedAssetInfo>();
+                var symbols = new Dictionary<string, SharedSpotSymbol>();
+                foreach (var symbol in cachedSymbols)
+                {
+                    if (!assets.TryGetValue(symbol.BaseAsset, out var baseAssetInfo))
+                    {
+                        baseAssetInfo = new SharedAssetInfo(symbol.BaseAsset, symbol.BaseAssetType, symbol.BaseAssetSubType);
+                        assets.Add(symbol.BaseAsset, baseAssetInfo);
+                    }
+
+                    if (!assets.TryGetValue(symbol.QuoteAsset, out var quoteAssetInfo))
+                    {
+                        quoteAssetInfo = new SharedAssetInfo(symbol.QuoteAsset, symbol.QuoteAssetType, symbol.QuoteAssetSubType);
+                        assets.Add(symbol.QuoteAsset, quoteAssetInfo);
+                    }
+
+                    symbols.Add(symbol.Name, symbol);
+                }
+
+                return new SharedSymbolCatalog
+                {
+                    Exchange = exchange,
+                    Assets = assets,
+                    Symbols = symbols
+                };
+            }
+        }
+
+
         class ExchangeInfo
         {
             public DateTime UpdateTime { get; set; }
-            public Dictionary<string, SharedSymbol> Symbols { get; set; }
+            public Dictionary<string, SharedSpotSymbol> Symbols { get; set; }
 
-            public ExchangeInfo(DateTime updateTime, Dictionary<string, SharedSymbol> symbols)
+            public ExchangeInfo(DateTime updateTime, Dictionary<string, SharedSpotSymbol> symbols)
             {
                 UpdateTime = updateTime;
                 Symbols = symbols;

CryptoExchange.Net/ExtensionMethods.cs

@@ -1,14 +1,20 @@
-using CryptoExchange.Net.Objects;
+using CryptoExchange.Net.Clients;
+using CryptoExchange.Net.Interfaces;
+using CryptoExchange.Net.Interfaces.Clients;
+using CryptoExchange.Net.Objects;
+using CryptoExchange.Net.RateLimiting;
 using CryptoExchange.Net.SharedApis;
 using Microsoft.Extensions.DependencyInjection;
 using System;
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.Globalization;
 using System.IO;
 using System.IO.Compression;
 using System.Linq;
 using System.Runtime.InteropServices;
 using System.Text;
+using System.Threading.Tasks;
 using System.Web;
 
 namespace CryptoExchange.Net
@@ -24,7 +30,7 @@ namespace CryptoExchange.Net
         /// <param name="parameters"></param>
         /// <param name="key"></param>
         /// <param name="value"></param>
-        public static void AddParameter(this Dictionary<string, object> parameters, string key, string value)
+        public static void AddParameter(this IDictionary<string, object> parameters, string key, string value)
         {
             parameters.Add(key, value);
         }
@@ -35,7 +41,7 @@ namespace CryptoExchange.Net
         /// <param name="parameters"></param>
         /// <param name="key"></param>
         /// <param name="value"></param>
-        public static void AddParameter(this Dictionary<string, object> parameters, string key, object value)
+        public static void AddParameter(this IDictionary<string, object> parameters, string key, object value)
         {
             parameters.Add(key, value);
         }
@@ -46,7 +52,7 @@ namespace CryptoExchange.Net
         /// <param name="parameters"></param>
         /// <param name="key"></param>
         /// <param name="value"></param>
-        public static void AddOptionalParameter(this Dictionary<string, object> parameters, string key, object? value)
+        public static void AddOptionalParameter(this IDictionary<string, object> parameters, string key, object? value)
         {
             if (value != null)
                 parameters.Add(key, value);
@@ -144,25 +150,42 @@ namespace CryptoExchange.Net
         /// <returns></returns>
         public static string ToFormData(this IDictionary<string, object> parameters)
         {
-            var formData = HttpUtility.ParseQueryString(string.Empty);
+            var result = new StringBuilder();
+            var first = true;
+
+            void Append(string key, object value)
+            {
+                if (!first)
+                    result.Append('&');
+                first = false;
+
+                if (!string.IsNullOrEmpty(key))
+                {
+                    result.Append(HttpUtility.UrlEncode(key, Encoding.UTF8));
+                    result.Append('=');
+                }
+
+                var text = string.Format(CultureInfo.InvariantCulture, "{0}", value);
+                result.Append(HttpUtility.UrlEncode(text, Encoding.UTF8));
+            }
+
             foreach (var kvp in parameters)
             {
                 if (kvp.Value is null)
                     continue;
 
-                if (kvp.Value.GetType().IsArray)
+                if (kvp.Value is Array array)
                 {
-                    var array = (Array)kvp.Value;
                     foreach (var value in array)
-                        formData.Add(kvp.Key, string.Format(CultureInfo.InvariantCulture, "{0}", value));
+                        Append(kvp.Key, value);
                 }
                 else
                 {
-                    formData.Add(kvp.Key, string.Format(CultureInfo.InvariantCulture, "{0}", kvp.Value));
+                    Append(kvp.Key, kvp.Value);
                 }
             }
 
-            return formData.ToString()!;
+            return result.ToString();
         }
 
         /// <summary>
@@ -378,8 +401,6 @@ namespace CryptoExchange.Net
                 services.AddTransient(x => (IDepositRestClient)client(x)!);
             if (typeof(IKlineRestClient).IsAssignableFrom(typeof(T)))
                 services.AddTransient(x => (IKlineRestClient)client(x)!);
-            if (typeof(IListenKeyRestClient).IsAssignableFrom(typeof(T)))
-                services.AddTransient(x => (IListenKeyRestClient)client(x)!);
             if (typeof(IOrderBookRestClient).IsAssignableFrom(typeof(T)))
                 services.AddTransient(x => (IOrderBookRestClient)client(x)!);
             if (typeof(IRecentTradeRestClient).IsAssignableFrom(typeof(T)))
@@ -396,7 +417,6 @@ namespace CryptoExchange.Net
                 services.AddTransient(x => (IBookTickerRestClient)client(x)!);
             if (typeof(ITransferRestClient).IsAssignableFrom(typeof(T)))
                 services.AddTransient(x => (ITransferRestClient)client(x)!);
-
             if (typeof(ISpotOrderRestClient).IsAssignableFrom(typeof(T)))
                 services.AddTransient(x => (ISpotOrderRestClient)client(x)!);
             if (typeof(ISpotSymbolRestClient).IsAssignableFrom(typeof(T)))
@@ -462,11 +482,15 @@ namespace CryptoExchange.Net
 
             if (typeof(ISpotOrderSocketClient).IsAssignableFrom(typeof(T)))
                 services.AddTransient(x => (ISpotOrderSocketClient)client(x)!);
+            if (typeof(ISpotOrderManagementSocketClient).IsAssignableFrom(typeof(T)))
+                services.AddTransient(x => (ISpotOrderManagementSocketClient)client(x)!);
 
             if (typeof(IFuturesOrderSocketClient).IsAssignableFrom(typeof(T)))
                 services.AddTransient(x => (IFuturesOrderSocketClient)client(x)!);
             if (typeof(IPositionSocketClient).IsAssignableFrom(typeof(T)))
                 services.AddTransient(x => (IPositionSocketClient)client(x)!);
+            if (typeof(IFuturesOrderManagementSocketClient).IsAssignableFrom(typeof(T)))
+                services.AddTransient(x => (IFuturesOrderManagementSocketClient)client(x)!);
 
             return services;
         }
@@ -490,6 +514,41 @@ namespace CryptoExchange.Net
 
             return bytes;
         }
+
+        /// <summary>
+        /// Execute an operation with a specific rate limit admission rule
+        /// </summary>
+        /// <param name="client">Client</param>
+        /// <param name="admission">Rate limit admission rule</param>
+        /// <param name="operation">Operation to execute</param>
+        public static Task<TResult> WithRateLimitAdmissionAsync<TClient, TResult>(
+            this TClient client,
+            RateLimitAdmission admission,
+            Func<TClient, Task<TResult>> operation)
+            where TClient : IRateLimitAdmissionClient
+        {
+            return client.WithRateLimitAdmissionAsync(
+                admission,
+                () => operation(client));
+        }
+
+
+        /// <summary>
+        /// Return the task results in the form of an IAsyncEnumerable, returning the first completed task first
+        /// </summary>
+        /// <typeparam name="T">Type of task result</typeparam>
+        /// <param name="tasks">Task list</param>
+        public static async IAsyncEnumerable<T> ParallelEnumerateAsync<T>(this IEnumerable<Task<T>> tasks)
+        {
+            var remaining = new List<Task<T>>(tasks);
+
+            while (remaining.Count != 0)
+            {
+                var task = await Task.WhenAny(remaining).ConfigureAwait(false);
+                remaining.Remove(task);
+                yield return await task.ConfigureAwait(false);
+            }
+        }
     }
 }
 

CryptoExchange.Net/Interfaces/Clients/IBaseApiClient.cs

@@ -1,6 +1,4 @@
-using CryptoExchange.Net.Authentication;
-using CryptoExchange.Net.Objects.Options;
-using CryptoExchange.Net.SharedApis;
+using CryptoExchange.Net.SharedApis;
 using System;
 
 namespace CryptoExchange.Net.Interfaces.Clients
@@ -8,8 +6,12 @@ namespace CryptoExchange.Net.Interfaces.Clients
     /// <summary>
     /// Base api client
     /// </summary>
-    public interface IBaseApiClient
+    public interface IBaseApiClient : IRateLimitAdmissionClient
     {
+        /// <summary>
+        /// Exchange name
+        /// </summary>
+        string Exchange { get; }
         /// <summary>
         /// Base address
         /// </summary>

CryptoExchange.Net/Interfaces/Clients/IRestApiClient.cs

@@ -28,6 +28,11 @@ namespace CryptoExchange.Net.Interfaces.Clients
         /// </summary>
         bool Authenticated { get; }
 
+        /// <summary>
+        /// Configured credentials
+        /// </summary>
+        TApiCredentials? ApiCredentials { get; }
+
         /// <summary>
         /// Set the API credentials for this API client
         /// </summary>

CryptoExchange.Net/Interfaces/Clients/ISocketApiClient.cs

@@ -84,6 +84,12 @@ namespace CryptoExchange.Net.Interfaces.Clients
         /// Whether or not API credentials have been configured for this client. Does not check the credentials are actually valid.
         /// </summary>
         bool Authenticated { get; }
+
+        /// <summary>
+        /// Configured credentials
+        /// </summary>
+        TApiCredentials? ApiCredentials { get; }
+
         /// <summary>
         /// Set the API credentials for this API client
         /// </summary>

CryptoExchange.Net/Interfaces/IRateLimitAdmissionClient.cs

@@ -0,0 +1,22 @@
+using CryptoExchange.Net.RateLimiting;
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CryptoExchange.Net.Interfaces
+{
+    /// <summary>
+    /// A client supporting rate limit admission rules
+    /// </summary>
+    public interface IRateLimitAdmissionClient
+    {
+        /// <summary>
+        /// Execute an operation with a specific rate limit admission rule
+        /// </summary>
+        Task<TResult> WithRateLimitAdmissionAsync<TResult>(
+            RateLimitAdmission admission,
+            Func<Task<TResult>> operation);
+    }
+
+}

CryptoExchange.Net/Interfaces/ISymbolOrderBook.cs

@@ -107,7 +107,7 @@ namespace CryptoExchange.Net.Interfaces
         /// </summary>
         /// <param name="ct">A cancellation token to stop the order book when canceled</param>
         /// <returns></returns>
-        Task<CallResult<bool>> StartAsync(CancellationToken? ct = null);
+        Task<CallResult> StartAsync(CancellationToken? ct = null);
 
         /// <summary>
         /// Stop syncing the order book

CryptoExchange.Net/Interfaces/ITrackerFactory.cs

@@ -24,8 +24,9 @@ namespace CryptoExchange.Net.Interfaces
         /// <param name="interval">Kline interval</param>
         /// <param name="limit">The max amount of klines to retain</param>
         /// <param name="period">The max period the data should be retained</param>
+        /// <param name="exchangeParameters">Exchange parameters</param>
         /// <returns></returns>
-        IKlineTracker CreateKlineTracker(SharedSymbol symbol, SharedKlineInterval interval, int? limit = null, TimeSpan? period = null);
+        IKlineTracker CreateKlineTracker(SharedSymbol symbol, SharedKlineInterval interval, int? limit = null, TimeSpan? period = null, ExchangeParameters? exchangeParameters = null);
 
         /// <summary>
         /// Whether the factory supports creating a TradeTracker instance for this symbol
@@ -39,7 +40,8 @@ namespace CryptoExchange.Net.Interfaces
         /// <param name="symbol">The symbol</param>
         /// <param name="limit">The max amount of trades to retain</param>
         /// <param name="period">The max period the data should be retained</param>
+        /// <param name="exchangeParameters">Exchange parameters</param>
         /// <returns></returns>
-        ITradeTracker CreateTradeTracker(SharedSymbol symbol, int? limit = null, TimeSpan? period = null);
+        ITradeTracker CreateTradeTracker(SharedSymbol symbol, int? limit = null, TimeSpan? period = null, ExchangeParameters? exchangeParameters = null);
     }
 }

CryptoExchange.Net/LibraryHelpers.cs

@@ -4,6 +4,8 @@ using CryptoExchange.Net.Objects.Options;
 using Microsoft.Extensions.Logging;
 using System;
 using System.Collections.Generic;
+using System.IO.Pipelines;
+using System.Linq;
 using System.Net;
 using System.Net.Http;
 
@@ -14,6 +16,61 @@ namespace CryptoExchange.Net
     /// </summary>
     public static class LibraryHelpers
     {
+        private static readonly HashSet<string> _stableCoins = new HashSet<string>(StringComparer.OrdinalIgnoreCase)
+        {
+            // USD
+            "USDT", "USDC", "DAI", "FDUSD", "USDE", "TUSD", "USDP", "PYUSD", "GUSD",
+            "USDD", "LUSD", "USDJ", "SUSD", "ZUSD", "BUSD", "USTC", "USDX", "USDK",
+            "CUSD", "USD1", "USD0", "XUSD", "BFUSD", "USDS", "RLUSD", "OUSD", "USDH",
+            "APXUSD", "USDQ", "USDPT", "FIDD", "AUSD",
+            // EUR
+            "EURS", "EURC", "EURI", "EURT", "AGEUR", "CEUR", "AEUR", "EURQ", "EUROP",
+            // Other
+            "CNYT",  // CNY
+            "CREAL", "BRL1", // BRL
+            "XSGD",  // SGD
+            "GYEN",  // JPY
+            "KGST",  // KGS
+            "QCAD",  // CAD
+            "TGBP",  // GBP
+            "AUDX",  // AUD
+            "MXNB",  // MXN
+        };
+
+        private static readonly HashSet<string> _commodities = new HashSet<string>(StringComparer.OrdinalIgnoreCase)
+        {
+            // Metals
+            "XAU", "XAUT", "XAG", "XPT", "XPD", "COPPER", "PAXG", "XNI", "XCU", "XAL", "GOLD", "SILVER",
+             // Energy
+            "BZ", "NATGAS", "NGAS", "CL", "XTI", "UKOIL", "USOIL", "BRENTOIL"
+        };
+
+        private static readonly HashSet<string> _stocks = new HashSet<string>(StringComparer.OrdinalIgnoreCase)
+        {
+            // Top stocks, will need to update periodically
+            "AAAU", "AADR", "AAPL", "ACWI", "ACWX", "AGG", "AMD", "AMLP", "AMZN", "ARKF",
+            "ARKG", "ARKK", "ARKQ", "ARKW", "AVGO", "BA", "BABA", "BND", "BNDX", "BOTZ",
+            "CIBR", "COIN", "DIA", "DIVB", "DVY", "EEM", "EFA", "EFAV", "ESGU", "EWG",
+            "EWJ", "EWT", "EWU", "EWW", "EWY", "EWZ", "FDN", "FEZ", "GLDM", "GOOGL",
+            "HDV", "HOOD", "HYG", "IAU", "IBB", "ICLN", "IEFA", "IEMG", "IGSB", "IJH",
+            "IJR", "INTC", "ITOT", "IUSB", "IUSG", "IUSV", "IWM", "IWO", "IWR", "IYR",
+            "JETS", "JPM", "LIT", "MCHI", "META", "MGK", "MSTR", "MTUM", "MU", "NET",
+            "NFLX", "NOBL", "NVDA", "OIH", "ORCL", "PAVE", "PBW", "PLTR", "QQQ", "QQQM",
+            "SCHB", "SCHD", "SCHF", "SCHG", "SCHH", "SCHV", "SCHX", "SKHY", "SPCX", "SPCXD",
+            "SPLG", "SPY", "SPYG", "SPYV", "SQQQ", "TSLA", "TSM", "TQQQ", "USMV", "VBR",
+            "VCIT", "VCSH", "VEA", "VEU", "VGIT", "VGK", "VGT", "VHT", "VIG", "VNQ",
+            "VOO", "VOT", "VTI", "VTV", "VUG", "VXUS", "XBI", "XLC", "XLE", "XLF",
+            "XLI", "XLK", "XLP", "XLU", "XLV", "XLY", "CSCO", "UBER", "MRVL", "RKLB",
+            "COHR", "SOXL", "HD", "DIS", "CBRS", "V", "BRKB", "FLNC", "LLY", "COST",
+            "ARM", "BMNR", "NBIS", "ASML", "AAOI", "GLW", "SHLD", "BE", "QNTX", "IBM",
+            "AMAT", "NOK", "ASTS", "BBX", "SLX", "SKHYNIX", "SAMSUNG", "HYUNDAI", "NVO",
+            "IREN", "ONDS", "CRM" , "VRT", "ZEST", "BTW", "HPE", "AXTI", "BX", "CRWD",
+            "CRDO", "NOW", "ZM", "DKNG", "RIVN", "URNM", "EBAY", "ADBE", "UVXY", "RDW",
+            "CIEN","PANW", "WIN", "PAYP", "HIMS", "CRWV", "QCOM", "LITE", "DRAM", "ANTHROPIC",
+            "OPENAI", "USAR", "BILL", "SNDK", "NASDAQ100", "SPX500", "BSB", "CRCL", "STRC",
+            "MSFT", "WDC"
+        };
+
         private static ILogger? _staticLogger;
         /// <summary>
         /// Static logger
@@ -55,6 +112,7 @@ namespace CryptoExchange.Net
             { "Kucoin.SpotKey", "f8ae62cb-2b3d-420c-8c98-e1c17dd4e30a" },
             { "Mexc", "EASYT" },
             { "OKX", "1425d83a94fbBCDE" },
+            { "Weex", "b-WEEX111124-" },
             { "XT", "4XWeqN10M1fcoI5L" },
         };
 
@@ -104,6 +162,67 @@ namespace CryptoExchange.Net
             return _defaultClientReferences.TryGetValue(key, out var id) ? id : throw new KeyNotFoundException($"{exchange} not found in configuration");
         }
 
+        /// <summary>
+        /// Check whether an asset is a known stablecoin. Note that this is not definitive, only large known stocks are checked
+        /// </summary>
+        /// <param name="asset">Asset name</param>
+        /// <param name="additionalStableCoins">Additional stablecoin names for the specific exchange</param>
+        public static bool IsStableCoin(string asset, params HashSet<string> additionalStableCoins)
+        {
+            if (string.IsNullOrEmpty(asset))
+                return false;
+
+            return _stableCoins.Contains(asset) || (additionalStableCoins != null && additionalStableCoins.Contains(asset, StringComparer.OrdinalIgnoreCase));
+        }
+
+        /// <summary>
+        /// Check whether an asset is a known commodity. Note that this is not definitive, only large known stocks are checked
+        /// </summary>
+        /// <param name="asset">Asset name</param>
+        /// <param name="additionalCommodities">Additional commodity names for the specific exchange</param>
+        public static bool IsCommodity(string asset, params HashSet<string> additionalCommodities)
+        {
+            if (string.IsNullOrEmpty(asset))
+                return false;
+
+            return _commodities.Contains(asset) || (additionalCommodities != null && additionalCommodities.Contains(asset, StringComparer.OrdinalIgnoreCase));
+        }
+
+        /// <summary>
+        /// Check whether an asset is a known stock. Note that this is not definitive, only large known stocks are checked
+        /// </summary>
+        /// <param name="asset">Asset name</param>
+        /// <param name="additionalStocks">Additional stock names for the specific exchange</param>
+        public static bool IsEquity(string asset, params HashSet<string> additionalStocks)
+            => IsEquity(asset, [], additionalStocks);
+
+        /// <summary>
+        /// Check whether an asset is a known stock.
+        /// </summary>
+        /// <param name="asset">Asset name</param>
+        /// <param name="potentialSuffixes">Suffixes to check, for example when `X` is a potential suffix both `TSLA` and `TSLAX` will be checked</param>
+        /// <param name="additionalStocks">Additional stock names for the specific exchange</param>
+        public static bool IsEquity(string asset, string[] potentialSuffixes, params HashSet<string> additionalStocks)
+        {
+            if (string.IsNullOrEmpty(asset))
+                return false;
+
+            if (_stocks.Contains(asset) || (additionalStocks != null && additionalStocks.Contains(asset, StringComparer.OrdinalIgnoreCase)))
+                return true;
+
+            foreach (var suffix in potentialSuffixes) 
+            {
+                if (!asset.EndsWith(suffix))
+                    continue;
+
+                var suffixAsset = asset.Substring(0, asset.Length - suffix.Length);
+                if (_stocks.Contains(suffixAsset) || (additionalStocks != null && additionalStocks.Contains(suffixAsset, StringComparer.OrdinalIgnoreCase)))
+                    return true;
+            }
+
+            return false;
+        }
+
         /// <summary>
         /// Create a new HttpMessageHandler instance
         /// </summary>  

CryptoExchange.Net/Logging/Extensions/RateLimitGateLoggingExtensions.cs

@@ -18,32 +18,32 @@ namespace CryptoExchange.Net.Logging.Extensions
             _rateLimitRequestFailed = LoggerMessage.Define<int, string, string, string>(
                 LogLevel.Warning,
                 new EventId(6000, "RateLimitRequestFailed"),
-                "[Req {Id}] Call to {Path} failed because of ratelimit guard {Guard}; {Limit}");
+                "[Req {Id}] call to {Path} failed because of ratelimit guard {Guard}; {Limit}");
 
             _rateLimitConnectionFailed = LoggerMessage.Define<int, string, string>(
                 LogLevel.Warning,
                 new EventId(6001, "RateLimitConnectionFailed"),
-                "[Sckt {Id}] Connection failed because of ratelimit guard {Guard}; {Limit}");
+                "[Sckt {Id}] connection failed because of ratelimit guard {Guard}; {Limit}");
 
             _rateLimitDelayingRequest = LoggerMessage.Define<int, string, TimeSpan, string, string>(
                 LogLevel.Warning,
                 new EventId(6002, "RateLimitDelayingRequest"),
-                "[Req {Id}] Delaying call to {Path} by {Delay} because of ratelimit guard {Guard}; {Limit}");
+                "[Req {Id}] delaying call to {Path} by {Delay} because of ratelimit guard {Guard}; {Limit}");
 
             _rateLimitDelayingConnection = LoggerMessage.Define<int, TimeSpan, string, string>(
                 LogLevel.Warning,
                 new EventId(6003, "RateLimitDelayingConnection"),
-                "[Sckt {Id}] Delaying connection by {Delay} because of ratelimit guard {Guard}; {Limit}");
+                "[Sckt {Id}] delaying connection by {Delay} because of ratelimit guard {Guard}; {Limit}");
 
             _rateLimitAppliedConnection = LoggerMessage.Define<int, string, string, int>(
                 LogLevel.Trace,
                 new EventId(6004, "RateLimitDelayingConnection"),
-                "[Sckt {Id}] Connection passed ratelimit guard {Guard}; {Limit}, New count: {Current}");
+                "[Sckt {Id}] connection passed ratelimit guard {Guard}; {Limit}, New count: {Current}");
 
             _rateLimitAppliedRequest = LoggerMessage.Define<int, string, string, string, int>(
                 LogLevel.Trace,
                 new EventId(6005, "RateLimitAppliedRequest"),
-                "[Req {Id}] Call to {Path} passed ratelimit guard {Guard}; {Limit}, New count: {Current}");
+                "[Req {Id}] call to {Path} passed ratelimit guard {Guard}; {Limit}, New count: {Current}");
         }
 
         public static void RateLimitRequestFailed(this ILogger logger, int requestId, string path, string guard, string limit)

CryptoExchange.Net/Logging/Extensions/RestApiClientLoggingExtensions.cs

@@ -22,74 +22,79 @@ namespace CryptoExchange.Net.Logging.Extensions
         private static readonly Action<ILogger, string, Exception?> _restApiCacheHit;
         private static readonly Action<ILogger, string, Exception?> _restApiCacheNotHit;
         private static readonly Action<ILogger, int?, Exception?> _restApiCancellationRequested;
+        private static readonly Action<ILogger, string, string, Exception?> _restApiRequestsJoined;
 
         static RestApiClientLoggingExtensions()
         {
             _restApiErrorReceived = LoggerMessage.Define<int?, int?, long, string?, string?>(
                 LogLevel.Warning,
                 new EventId(4000, "RestApiErrorReceived"),
-                "[Req {RequestId}] {ResponseStatusCode} - Error received in {ResponseTime}ms: {ErrorMessage}, Data: {OriginalData}");
+                "[Req {RequestId}] {ResponseStatusCode} - error received in {ResponseTime}ms: {ErrorMessage}, Data: {OriginalData}");
 
             _restApiResponseReceived = LoggerMessage.Define<int?, int?, long, string?>(
                 LogLevel.Debug,
                 new EventId(4001, "RestApiResponseReceived"),
-                "[Req {RequestId}] {ResponseStatusCode} - Response received in {ResponseTime}ms: {OriginalData}");
+                "[Req {RequestId}] {ResponseStatusCode} - response received in {ResponseTime}ms: {OriginalData}");
 
             _restApiFailedToSyncTime = LoggerMessage.Define<int, string>(
                 LogLevel.Debug,
                 new EventId(4002, "RestApiFailedToSyncTime"),
-                "[Req {RequestId}] Failed to sync time, aborting request: {ErrorMessage}");
+                "[Req {RequestId}] failed to sync time, aborting request: {ErrorMessage}");
 
             _restApiNoApiCredentials = LoggerMessage.Define<int, string>(
                 LogLevel.Warning,
                 new EventId(4003, "RestApiNoApiCredentials"),
-                "[Req {RequestId}] Request {RestApiUri} failed because no ApiCredentials were provided");
+                "[Req {RequestId}] request {RestApiUri} failed because no ApiCredentials were provided");
 
             _restApiCreatingRequest = LoggerMessage.Define<int, Uri>(
                 LogLevel.Information,
                 new EventId(4004, "RestApiCreatingRequest"),
-                "[Req {RequestId}] Creating request for {RestApiUri}");
+                "[Req {RequestId}] creating request for {RestApiUri}");
 
             _restApiSendingRequest = LoggerMessage.Define<int, HttpMethod, string, Uri, string>(
                 LogLevel.Trace,
                 new EventId(4005, "RestApiSendingRequest"),
-                "[Req {RequestId}] Sending {Method} {Signed} request to {RestApiUri}{Query}");
+                "[Req {RequestId}] sending {Method} {Signed} request to {RestApiUri}{Query}");
 
             _restApiRateLimitRetry = LoggerMessage.Define<int, DateTime>(
                 LogLevel.Warning,
                 new EventId(4006, "RestApiRateLimitRetry"),
-                "[Req {RequestId}] Received ratelimit error, retrying after {Timestamp}");
+                "[Req {RequestId}] received ratelimit error, retrying after {Timestamp}");
 
             _restApiRateLimitPauseUntil = LoggerMessage.Define<int, DateTime>(
                 LogLevel.Warning,
                 new EventId(4007, "RestApiRateLimitPauseUntil"),
-                "[Req {RequestId}] Ratelimit error from server, pausing requests until {Until}");
+                "[Req {RequestId}] ratelimit error from server, pausing requests until {Until}");
 
             _restApiSendRequest = LoggerMessage.Define<int, RequestDefinition, string?, string, string>(
                 LogLevel.Debug,
                 new EventId(4008, "RestApiSendRequest"),
-                "[Req {RequestId}] Sending {Definition} request with body {Body}, query parameters {Query} and headers {Headers}");
+                "[Req {RequestId}] sending {Definition} request with body {Body}, query parameters {Query} and headers {Headers}");
 
             _restApiCheckingCache = LoggerMessage.Define<string>(
                 LogLevel.Trace,
                 new EventId(4009, "RestApiCheckingCache"),
-                "Checking cache for key {Key}");
+                "checking cache for key {Key}");
 
             _restApiCacheHit = LoggerMessage.Define<string>(
                 LogLevel.Trace,
                 new EventId(4010, "RestApiCacheHit"),
-                "Cache hit for key {Key}");
+                "cache hit for key {Key}");
 
             _restApiCacheNotHit = LoggerMessage.Define<string>(
                 LogLevel.Trace,
                 new EventId(4011, "RestApiCacheNotHit"),
-                "Cache not hit for key {Key}");
+                "cache not hit for key {Key}");
 
             _restApiCancellationRequested = LoggerMessage.Define<int?>(
                 LogLevel.Debug,
                 new EventId(4012, "RestApiCancellationRequested"),
-                "[Req {RequestId}] Request cancelled by user");
-            
+                "[Req {RequestId}] request cancelled by user");
+
+            _restApiRequestsJoined = LoggerMessage.Define<string, string>(
+                LogLevel.Debug,
+                new EventId(4013, "RestApiRequestsJoined"),
+                "Request for {Method} {Path} joined with in flight request");
         }
 
         public static void RestApiErrorReceived(this ILogger logger, int? requestId, HttpStatusCode? responseStatusCode, long responseTime, string? error, string? originalData, Exception? exception)
@@ -151,9 +156,15 @@ namespace CryptoExchange.Net.Logging.Extensions
         {
             _restApiCacheNotHit(logger, key, null);
         }
+
         public static void RestApiCancellationRequested(this ILogger logger, int? requestId)
         {
             _restApiCancellationRequested(logger, requestId, null);
         }
+
+        public static void RestApiRequestsJoined(this ILogger logger, string method, string path)
+        {
+            _restApiRequestsJoined(logger, method, path, null);
+        }
     }
 }

CryptoExchange.Net/Logging/Extensions/SocketApiClientLoggingExtension.cs

@@ -61,7 +61,7 @@ namespace CryptoExchange.Net.Logging.Extensions
             _attemptingToAuthenticate = LoggerMessage.Define<int>(
                 LogLevel.Debug,
                 new EventId(3006, "AttemptingToAuthenticate"),
-                "[Sckt {SocketId}] Attempting to authenticate");
+                "[Sckt {SocketId}] attempting to authenticate");
 
             _authenticationFailed = LoggerMessage.Define<int>(
                 LogLevel.Warning,
@@ -76,12 +76,12 @@ namespace CryptoExchange.Net.Logging.Extensions
             _failedToDetermineConnectionUrl = LoggerMessage.Define<string?>(
                 LogLevel.Warning,
                 new EventId(3009, "FailedToDetermineConnectionUrl"),
-                "Failed to determine connection url: {ErrorMessage}");
+                "failed to determine connection url: {ErrorMessage}");
 
             _connectionAddressSetTo = LoggerMessage.Define<string>(
                 LogLevel.Debug,
                 new EventId(3010, "ConnectionAddressSetTo"),
-                "Connection address set to {ConnectionAddress}");
+                "connection address set to {ConnectionAddress}");
 
             _socketCreatedForAddress = LoggerMessage.Define<int, string>(
                 LogLevel.Debug,
@@ -91,37 +91,37 @@ namespace CryptoExchange.Net.Logging.Extensions
             _unsubscribingAll = LoggerMessage.Define<int>(
                 LogLevel.Information,
                 new EventId(3013, "UnsubscribingAll"),
-                "Unsubscribing all {SubscriptionCount} subscriptions");
+                "unsubscribing all {SubscriptionCount} subscriptions");
 
             _disposingSocketClient = LoggerMessage.Define(
                 LogLevel.Debug,
                 new EventId(3015, "DisposingSocketClient"),
-                "Disposing socket client, closing all subscriptions");
+                "disposing socket client, closing all subscriptions");
 
             _unsubscribingSubscription = LoggerMessage.Define<int, int>(
                 LogLevel.Information,
                 new EventId(3016, "UnsubscribingSubscription"),
-                "[Sckt {SocketId}] Unsubscribing subscription {SubscriptionId}");
+                "[Sckt {SocketId}] unsubscribing subscription {SubscriptionId}");
 
             _reconnectingAllConnections = LoggerMessage.Define<int>(
                 LogLevel.Information,
                 new EventId(3017, "ReconnectingAll"),
-                "Reconnecting all {ConnectionCount} connections");
+                "reconnecting all {ConnectionCount} connections");
 
             _addingRetryAfterGuard = LoggerMessage.Define<DateTime>(
                 LogLevel.Warning,
                 new EventId(3018, "AddRetryAfterGuard"),
-                "Adding RetryAfterGuard ({RetryAfter}) because the connection attempt was rate limited");
+                "adding RetryAfterGuard ({RetryAfter}) because the connection attempt was rate limited");
 
             _timeoutWaitingForReconnectingSocket = LoggerMessage.Define(
                 LogLevel.Debug,
                 new EventId(3019, "TimeoutWaitingForReconnectingSocket"),
-                "Timeout while waiting for existing socket reconnection, failing request");
+                "timeout while waiting for existing socket reconnection, failing request");
 
             _waitedForReconnectingSocket = LoggerMessage.Define<long>(
                 LogLevel.Trace,
                 new EventId(3020, "WaitedForReconnectingSocket"),
-                "Waited for reconnecting socket for {Timespan}ms");
+                "waited for reconnecting socket for {Timespan}ms");
         }
 
         public static void FailedToAddSubscriptionRetryOnDifferentConnection(this ILogger logger, int socketId)

CryptoExchange.Net/Logging/Extensions/SocketConnectionLoggingExtension.cs

@@ -60,7 +60,7 @@ namespace CryptoExchange.Net.Logging.Extensions
             _unknownExceptionWhileProcessingReconnection = LoggerMessage.Define<int>(
                 LogLevel.Warning,
                 new EventId(2003, "UnknownExceptionWhileProcessingReconnection"),
-                "[Sckt {SocketId}] Unknown exception while processing reconnection, reconnecting again");
+                "[Sckt {SocketId}] unknown exception while processing reconnection, reconnecting again");
 
             _webSocketErrorCodeAndDetails = LoggerMessage.Define<int, WebSocketError, string?>(
                 LogLevel.Warning,
@@ -180,7 +180,7 @@ namespace CryptoExchange.Net.Logging.Extensions
             _receivedMessageNotMatchedToAnyListener = LoggerMessage.Define<int, string, string, string>(
                 LogLevel.Warning,
                 new EventId(2029, "ReceivedMessageNotMatchedToAnyListener"),
-                "[Sckt {SocketId}] received message not matched to any listener. TypeIdentifier: {TypeIdentifier}, ListenId: {ListenId}, current listeners: [{ListenIds}]");
+                "[Sckt {SocketId}] received message not matched to any listener. TypeIdentifier: {TypeIdentifier}, TopicFilter: {ListenId}, registered TopicFilters for type: [{TopicFilters}]");
 
             _failedToParse = LoggerMessage.Define<int, string>(
                 LogLevel.Warning,
@@ -326,9 +326,9 @@ namespace CryptoExchange.Net.Logging.Extensions
             _sendingData(logger, socketId, requestId, data, null);
         }
 
-        public static void ReceivedMessageNotMatchedToAnyListener(this ILogger logger, int socketId, string typeIdentifier, string listenId, string listenIds)
+        public static void ReceivedMessageNotMatchedToAnyListener(this ILogger logger, int socketId, string typeIdentifier, string topicFilter, string topicFilters)
         {
-            _receivedMessageNotMatchedToAnyListener(logger, socketId, typeIdentifier, listenId, listenIds, null);
+            _receivedMessageNotMatchedToAnyListener(logger, socketId, typeIdentifier, topicFilter, topicFilters, null);
         }
 
         public static void SendingByteData(this ILogger logger, int socketId, int requestId, int length)

CryptoExchange.Net/Objects/CallResult.cs

@@ -1,592 +0,0 @@
-using CryptoExchange.Net.SharedApis;
-using System;
-using System.Diagnostics.CodeAnalysis;
-using System.Net;
-using System.Net.Http;
-using System.Net.Http.Headers;
-using System.Text;
-
-namespace CryptoExchange.Net.Objects
-{
-    /// <summary>
-    /// The result of an operation
-    /// </summary>
-    public class CallResult
-    {
-        /// <summary>
-        /// Static success result
-        /// </summary>
-        public static CallResult SuccessResult { get; } = new CallResult(null);
-
-        /// <summary>
-        /// An error if the call didn't succeed, will always be filled if Success = false
-        /// </summary>
-        public Error? Error { get; internal set; }
-
-        /// <summary>
-        /// Whether the call was successful
-        /// </summary>
-        public bool Success => Error == null;
-
-        /// <summary>
-        /// ctor
-        /// </summary>
-        /// <param name="error"></param>
-        public CallResult(Error? error)
-        {
-            Error = error;
-        }
-
-        /// <summary>
-        /// Overwrite bool check so we can use if(callResult) instead of if(callResult.Success)
-        /// </summary>
-        /// <param name="obj"></param>
-        public static implicit operator bool(CallResult obj)
-        {
-            return obj?.Success == true;
-        }
-
-        /// <inheritdoc />
-        public override string ToString()
-        {
-            return Success ? $"Success" : $"Error: {Error}";
-        }
-    }
-
-    /// <summary>
-    /// The result of an operation
-    /// </summary>
-    /// <typeparam name="T"></typeparam>
-    public class CallResult<T>: CallResult
-    {
-        /// <summary>
-        /// The data returned by the call, only available when Success = true
-        /// </summary>
-        public T Data { get; internal set; }
-
-        /// <summary>
-        /// The original data returned by the call, only available when `OutputOriginalData` is set to `true` in the client options
-        /// </summary>
-        public string? OriginalData { get; internal set; }
-
-        /// <summary>
-        /// ctor
-        /// </summary>
-        /// <param name="data"></param>
-        /// <param name="originalData"></param>
-        /// <param name="error"></param>
-#pragma warning disable 8618
-        public CallResult([AllowNull]T data, string? originalData, Error? error): base(error)
-#pragma warning restore 8618
-        {
-            OriginalData = originalData;
-#pragma warning disable 8601
-            Data = data;
-#pragma warning restore 8601
-        }
-
-        /// <summary>
-        /// Create a new data result
-        /// </summary>
-        /// <param name="data">The data to return</param>
-        public CallResult(T data) : this(data, null, null) { }
-
-        /// <summary>
-        /// Create a new error result
-        /// </summary>
-        /// <param name="error">The error to return</param>
-        public CallResult(Error error) : this(default, null, error) { }
-
-        /// <summary>
-        /// Create a new error result
-        /// </summary>
-        /// <param name="error">The error to return</param>
-        /// <param name="originalData">The original response data</param>
-        public CallResult(Error error, string? originalData) : this(default, originalData, error) { }
-
-        /// <summary>
-        /// Overwrite bool check so we can use if(callResult) instead of if(callResult.Success)
-        /// </summary>
-        /// <param name="obj"></param>
-        public static implicit operator bool(CallResult<T> obj)
-        {
-            return obj?.Success == true;
-        }
-
-        /// <summary>
-        /// Whether the call was successful or not. Useful for nullability checking.
-        /// </summary>
-        /// <param name="data">The data returned by the call.</param>
-        /// <param name="error"><see cref="Error"/> on failure.</param>
-        /// <returns><c>true</c> when <see cref="CallResult{T}"/> succeeded, <c>false</c> otherwise.</returns>
-        public bool GetResultOrError([MaybeNullWhen(false)] out T data, [NotNullWhen(false)] out Error? error)
-        {
-            if (Success)
-            {
-                data = Data!;
-                error = null;
-
-                return true;
-            }
-            else
-            {
-                data = default;
-                error = Error!;
-
-                return false;
-            }
-        }
-
-        /// <summary>
-        /// Copy the WebCallResult to a new data type
-        /// </summary>
-        /// <typeparam name="K">The new type</typeparam>
-        /// <param name="data">The data of the new type</param>
-        /// <returns></returns>
-        public CallResult<K> As<K>([AllowNull] K data)
-        {
-            return new CallResult<K>(data, OriginalData, Error);
-        }
-
-        /// <summary>
-        /// Copy as a dataless result
-        /// </summary>
-        /// <returns></returns>
-        public CallResult AsDataless()
-        {
-            if (Error != null )
-                return new CallResult(Error);
-
-            return SuccessResult;
-        }
-
-        /// <summary>
-        /// Copy as a dataless result
-        /// </summary>
-        /// <returns></returns>
-        public CallResult AsDatalessError(Error error)
-        {
-            return new CallResult(error);
-        }
-
-        /// <summary>
-        /// Copy the CallResult to a new data type
-        /// </summary>
-        /// <typeparam name="K">The new type</typeparam>
-        /// <param name="data">The data</param>
-        /// <param name="error">The error returned</param>
-        /// <returns></returns>
-        public CallResult<K> AsErrorWithData<K>(Error error, K data)
-        {
-            return new CallResult<K>(data, OriginalData, error);
-        }
-
-        /// <summary>
-        /// Copy the WebCallResult to a new data type
-        /// </summary>
-        /// <typeparam name="K">The new type</typeparam>
-        /// <param name="error">The error to return</param>
-        /// <returns></returns>
-        public CallResult<K> AsError<K>(Error error)
-        {
-            return new CallResult<K>(default, OriginalData, error);
-        }
-
-        /// <inheritdoc />
-        public override string ToString()
-        {
-            return Success ? $"Success" : $"Error: {Error}";
-        }
-    }
-
-    /// <summary>
-    /// The result of a request
-    /// </summary>
-    public class WebCallResult : CallResult
-    {
-        /// <summary>
-        /// The request http method
-        /// </summary>
-        public HttpMethod? RequestMethod { get; set; }
-        
-        /// <summary>
-        /// HTTP protocol version
-        /// </summary>
-        public Version? HttpVersion { get; set; }
-
-        /// <summary>
-        /// The headers sent with the request
-        /// </summary>
-        public HttpRequestHeaders? RequestHeaders { get; set; }
-
-        /// <summary>
-        /// The request id
-        /// </summary>
-        public int? RequestId { get; set; }
-
-        /// <summary>
-        /// The url which was requested
-        /// </summary>
-        public string? RequestUrl { get; set; }
-
-        /// <summary>
-        /// The body of the request
-        /// </summary>
-        public string? RequestBody { get; set; }
-
-        /// <summary>
-        /// The original data returned by the call, only available when `OutputOriginalData` is set to `true` in the client options
-        /// </summary>
-        public string? OriginalData { get; internal set; }
-
-        /// <summary>
-        /// The status code of the response. Note that a OK status does not always indicate success, check the Success parameter for this.
-        /// </summary>
-        public HttpStatusCode? ResponseStatusCode { get; set; }
-
-        /// <summary>
-        /// The response headers
-        /// </summary>
-        public HttpResponseHeaders? ResponseHeaders { get; set; }
-
-        /// <summary>
-        /// The time between sending the request and receiving the response
-        /// </summary>
-        public TimeSpan? ResponseTime { get; set; }
-
-        /// <summary>
-        /// ctor
-        /// </summary>
-        public WebCallResult(
-            HttpStatusCode? code,
-            Version? httpVersion,
-            HttpResponseHeaders? responseHeaders,
-            TimeSpan? responseTime,
-            string? originalData,
-            int? requestId,
-            string? requestUrl,
-            string? requestBody,
-            HttpMethod? requestMethod,
-            HttpRequestHeaders? requestHeaders,
-            Error? error) : base(error)
-        {
-            ResponseStatusCode = code;
-            HttpVersion = httpVersion;
-            ResponseHeaders = responseHeaders;
-            ResponseTime = responseTime;
-            RequestId = requestId;
-            OriginalData = originalData;
-
-            RequestUrl = requestUrl;
-            RequestBody = requestBody;
-            RequestHeaders = requestHeaders;
-            RequestMethod = requestMethod;
-        }
-
-        /// <summary>
-        /// ctor
-        /// </summary>
-        /// <param name="error"></param>
-        public WebCallResult(Error error): base(error) { }
-
-        /// <summary>
-        /// Return the result as an error result
-        /// </summary>
-        /// <param name="error">The error returned</param>
-        /// <returns></returns>
-        public WebCallResult AsError(Error error)
-        {
-            return new WebCallResult(ResponseStatusCode, HttpVersion, ResponseHeaders, ResponseTime, OriginalData, RequestId, RequestUrl, RequestBody, RequestMethod, RequestHeaders, error);
-        }
-
-        /// <summary>
-        /// Copy the WebCallResult to a new data type
-        /// </summary>
-        /// <typeparam name="K">The new type</typeparam>
-        /// <param name="data">The data of the new type</param>
-        /// <returns></returns>
-        public WebCallResult<K> As<K>([AllowNull] K data)
-        {
-            return new WebCallResult<K>(ResponseStatusCode, HttpVersion, ResponseHeaders, ResponseTime, 0, null, RequestId, RequestUrl, RequestBody, RequestMethod, RequestHeaders, ResultDataSource.Server, data, Error);
-        }
-
-        /// <summary>
-        /// Copy the WebCallResult to an ExchangeWebResult of a new data type
-        /// </summary>
-        /// <typeparam name="K">The new type</typeparam>
-        /// <param name="exchange">The exchange</param>
-        /// <param name="tradeMode">Trade mode the result applies to</param>
-        /// <param name="data">The data</param>
-        /// <returns></returns>
-        public ExchangeWebResult<K> AsExchangeResult<K>(string exchange, TradingMode tradeMode, [AllowNull] K data)
-        {
-            return new ExchangeWebResult<K>(exchange, tradeMode, this.As<K>(data));
-        }
-
-        /// <summary>
-        /// Copy the WebCallResult to an ExchangeWebResult of a new data type
-        /// </summary>
-        /// <typeparam name="K">The new type</typeparam>
-        /// <param name="exchange">The exchange</param>
-        /// <param name="tradeModes">Trade modes the result applies to</param>
-        /// <param name="data">The data</param>
-        /// <returns></returns>
-        public ExchangeWebResult<K> AsExchangeResult<K>(string exchange, TradingMode[]? tradeModes, [AllowNull] K data)
-        {
-            return new ExchangeWebResult<K>(exchange, tradeModes, this.As<K>(data));
-        }
-
-        /// <summary>
-        /// Copy the WebCallResult to a new data type
-        /// </summary>
-        /// <typeparam name="K">The new type</typeparam>
-        /// <param name="error">The error returned</param>
-        /// <returns></returns>
-        public WebCallResult<K> AsError<K>(Error error)
-        {
-            return new WebCallResult<K>(ResponseStatusCode, HttpVersion, ResponseHeaders, ResponseTime, 0, null, RequestId, RequestUrl, RequestBody, RequestMethod, RequestHeaders, ResultDataSource.Server, default, error);
-        }
-
-        /// <inheritdoc />
-        public override string ToString()
-        {
-            return (Success ? $"Success" : $"Error: {Error}") + $" in {ResponseTime}";
-        }
-    }
-
-    /// <summary>
-    /// The result of a request
-    /// </summary>
-    /// <typeparam name="T"></typeparam>
-    public class WebCallResult<T>: CallResult<T>
-    {
-        /// <summary>
-        /// The request http method
-        /// </summary>
-        public HttpMethod? RequestMethod { get; set; }
-
-        /// <summary>
-        /// HTTP protocol version
-        /// </summary>
-        public Version? HttpVersion { get; set; }
-
-        /// <summary>
-        /// The headers sent with the request
-        /// </summary>
-        public HttpRequestHeaders? RequestHeaders { get; set; }
-
-        /// <summary>
-        /// The request id
-        /// </summary>
-        public int? RequestId { get; set; }
-
-        /// <summary>
-        /// The url which was requested
-        /// </summary>
-        public string? RequestUrl { get; set; }
-
-        /// <summary>
-        /// The body of the request
-        /// </summary>
-        public string? RequestBody { get; set; }
-
-        /// <summary>
-        /// The status code of the response. Note that a OK status does not always indicate success, check the Success parameter for this.
-        /// </summary>
-        public HttpStatusCode? ResponseStatusCode { get; set; }
-
-        /// <summary>
-        /// Length in bytes of the response
-        /// </summary>
-        public long? ResponseLength { get; set; }
-
-        /// <summary>
-        /// The response headers
-        /// </summary>
-        public HttpResponseHeaders? ResponseHeaders { get; set; }
-
-        /// <summary>
-        /// The time between sending the request and receiving the response
-        /// </summary>
-        public TimeSpan? ResponseTime { get; set; }
-
-        /// <summary>
-        /// The data source of this result
-        /// </summary>
-        public ResultDataSource DataSource { get; set; } = ResultDataSource.Server;
-
-        /// <summary>
-        /// Create a new result
-        /// </summary>
-        public WebCallResult(
-            HttpStatusCode? code,
-            Version? httpVersion,
-            HttpResponseHeaders? responseHeaders,
-            TimeSpan? responseTime,
-            long? responseLength,
-            string? originalData,
-            int? requestId,
-            string? requestUrl,
-            string? requestBody,
-            HttpMethod? requestMethod,
-            HttpRequestHeaders? requestHeaders,
-            ResultDataSource dataSource,
-            [AllowNull] T data,
-            Error? error) : base(data, originalData, error)
-        {
-            HttpVersion = httpVersion;
-            ResponseStatusCode = code;
-            ResponseHeaders = responseHeaders;
-            ResponseTime = responseTime;
-            ResponseLength = responseLength;
-
-            RequestId = requestId;
-            RequestUrl = requestUrl;
-            RequestBody = requestBody;
-            RequestHeaders = requestHeaders;
-            RequestMethod = requestMethod;
-            DataSource = dataSource;
-        }
-
-        /// <summary>
-        /// Copy as a dataless result
-        /// </summary>
-        /// <returns></returns>
-        public new WebCallResult AsDataless()
-        {
-            return new WebCallResult(ResponseStatusCode, HttpVersion, ResponseHeaders, ResponseTime, OriginalData, RequestId, RequestUrl, RequestBody, RequestMethod, RequestHeaders, Error);
-        }
-        /// <summary>
-        /// Copy as a dataless result
-        /// </summary>
-        /// <returns></returns>
-        public new WebCallResult AsDatalessError(Error error)
-        {
-            return new WebCallResult(ResponseStatusCode, HttpVersion, ResponseHeaders, ResponseTime, OriginalData, RequestId, RequestUrl, RequestBody, RequestMethod, RequestHeaders, error);
-        }
-
-        /// <summary>
-        /// Create a new error result
-        /// </summary>
-        /// <param name="error">The error</param>
-        public WebCallResult(Error? error) : this(null, null, null, null, null, null, null, null, null, null, null, ResultDataSource.Server, default, error) { }
-
-        /// <summary>
-        /// Copy the WebCallResult to a new data type
-        /// </summary>
-        /// <typeparam name="K">The new type</typeparam>
-        /// <param name="data">The data of the new type</param>
-        /// <returns></returns>
-        public new WebCallResult<K> As<K>([AllowNull] K data)
-        {
-            return new WebCallResult<K>(ResponseStatusCode, HttpVersion, ResponseHeaders, ResponseTime, ResponseLength, OriginalData, RequestId, RequestUrl, RequestBody, RequestMethod, RequestHeaders, DataSource, data, Error);
-        }
-
-        /// <summary>
-        /// Copy the WebCallResult to a new data type
-        /// </summary>
-        /// <typeparam name="K">The new type</typeparam>
-        /// <param name="error">The error returned</param>
-        /// <returns></returns>
-        public new WebCallResult<K> AsError<K>(Error error)
-        {
-            return new WebCallResult<K>(ResponseStatusCode, HttpVersion, ResponseHeaders, ResponseTime, ResponseLength, OriginalData, RequestId, RequestUrl, RequestBody, RequestMethod, RequestHeaders, DataSource, default, error);
-        }
-
-        /// <summary>
-        /// Copy the WebCallResult to a new data type
-        /// </summary>
-        /// <typeparam name="K">The new type</typeparam>
-        /// <param name="data">The data</param>
-        /// <param name="error">The error returned</param>
-        /// <returns></returns>
-        public new WebCallResult<K> AsErrorWithData<K>(Error error, K data)
-        {
-            return new WebCallResult<K>(ResponseStatusCode, HttpVersion, ResponseHeaders, ResponseTime, ResponseLength, OriginalData, RequestId, RequestUrl, RequestBody, RequestMethod, RequestHeaders, DataSource, data, error);
-        }
-
-        /// <summary>
-        /// Copy the WebCallResult to an ExchangeWebResult of a new data type
-        /// </summary>
-        /// <param name="exchange">The exchange</param>
-        /// <param name="tradeMode">Trade mode the result applies to</param>
-        /// <returns></returns>
-        public ExchangeWebResult<T> AsExchangeResult(string exchange, TradingMode tradeMode)
-        {
-            return new ExchangeWebResult<T>(exchange, tradeMode, this);
-        }
-
-        /// <summary>
-        /// Copy the WebCallResult to an ExchangeWebResult of a new data type
-        /// </summary>
-        /// <param name="exchange">The exchange</param>
-        /// <param name="tradeModes">Trade modes the result applies to</param>
-        /// <returns></returns>
-        public ExchangeWebResult<T> AsExchangeResult(string exchange, TradingMode[] tradeModes)
-        {
-            return new ExchangeWebResult<T>(exchange, tradeModes, this);
-        }
-
-        /// <summary>
-        /// Copy the WebCallResult to an ExchangeWebResult of a new data type
-        /// </summary>
-        /// <typeparam name="K">The new type</typeparam>
-        /// <param name="exchange">The exchange</param>
-        /// <param name="tradeMode">Trade mode the result applies to</param>
-        /// <param name="data">Data</param>
-        /// <param name="nextPageRequest">Next page request</param>
-        /// <returns></returns>
-        public ExchangeWebResult<K> AsExchangeResult<K>(string exchange, TradingMode tradeMode, [AllowNull] K data, PageRequest? nextPageRequest = null)
-        {
-            return new ExchangeWebResult<K>(exchange, tradeMode, As<K>(data), nextPageRequest);
-        }
-
-        /// <summary>
-        /// Copy the WebCallResult to an ExchangeWebResult of a new data type
-        /// </summary>
-        /// <typeparam name="K">The new type</typeparam>
-        /// <param name="exchange">The exchange</param>
-        /// <param name="tradeModes">Trade modes the result applies to</param>
-        /// <param name="data">Data</param>
-        /// <param name="nextPageRequest">Next page token</param>
-        /// <returns></returns>
-        public ExchangeWebResult<K> AsExchangeResult<K>(string exchange, TradingMode[]? tradeModes, [AllowNull] K data, PageRequest? nextPageRequest = null)
-        {
-            return new ExchangeWebResult<K>(exchange, tradeModes, As<K>(data), nextPageRequest);
-        }
-
-        /// <summary>
-        /// Copy the WebCallResult to an ExchangeWebResult with a specific error
-        /// </summary>
-        /// <typeparam name="K">The new type</typeparam>
-        /// <param name="exchange">The exchange</param>
-        /// <param name="error">The error returned</param>
-        /// <returns></returns>
-        public ExchangeWebResult<K> AsExchangeError<K>(string exchange, Error error)
-        {
-            return new ExchangeWebResult<K>(exchange, null, AsError<K>(error));
-        }
-
-        /// <summary>
-        /// Return a copy of this result with data source set to cache
-        /// </summary>
-        /// <returns></returns>
-        internal WebCallResult<T> Cached()
-        {
-            return new WebCallResult<T>(ResponseStatusCode, HttpVersion, ResponseHeaders, ResponseTime, ResponseLength, OriginalData, RequestId, RequestUrl, RequestBody, RequestMethod, RequestHeaders, ResultDataSource.Cache, Data, Error);
-        }
-
-        /// <inheritdoc />
-        public override string ToString()
-        {
-            var sb = new StringBuilder();
-            sb.Append(Success ? $"Success response" : $"Error response: {Error}");
-            if (ResponseLength != null)
-                sb.Append($", {ResponseLength} bytes");
-            if (ResponseTime != null)
-                sb.Append($", received in {Math.Round(ResponseTime?.TotalMilliseconds ?? 0)}ms");
-
-            return sb.ToString();
-        }
-    }
-}

CryptoExchange.Net/Objects/Error.cs

@@ -149,6 +149,14 @@ namespace CryptoExchange.Net.Objects
     /// </summary>
     public class ServerError : Error
     {
+        /// <summary>
+        /// ctor
+        /// </summary>
+        public ServerError(ErrorType type, string message, Exception? exception = null)
+            : base(null, new ErrorInfo(type, message), exception)
+        {
+        }
+
         /// <summary>
         /// ctor
         /// </summary>

CryptoExchange.Net/Objects/Options/ExchangeOptions.cs

@@ -1,4 +1,5 @@
 using CryptoExchange.Net.Authentication;
+using CryptoExchange.Net.RateLimiting;
 using System;
 
 namespace CryptoExchange.Net.Objects.Options
@@ -22,6 +23,10 @@ namespace CryptoExchange.Net.Objects.Options
         /// Note that this comes at a performance cost
         /// </summary>
         public bool OutputOriginalData { get; set; } = false;
+        /// <summary>
+        /// A group name to use for client side rate limiting. Requests with the same group name will be counted together for rate limiting purposes. If null all requests will be counted together.
+        /// </summary>
+        public string? RateLimitGroup { get; set; }
 
         /// <summary>
         /// The max time a request is allowed to take
@@ -37,10 +42,16 @@ namespace CryptoExchange.Net.Objects.Options
         /// </summary>
         public RateLimitingBehaviour RateLimitingBehaviour { get; set; } = RateLimitingBehaviour.Wait;
 
+        /// <summary>
+        /// A delegate receiving the request definition and the request weight that can be used to determine whether a request should be admitted or rejected based 
+        /// on the request definition and the current rate limit usage ratio. This allows for custom rate limiting logic to be implemented.
+        /// </summary>
+        public Func<RequestDefinition, int, RateLimitAdmission>? RateLimitAdmission { get; set; }
+
         /// <inheritdoc />
         public override string ToString()
         {
-            return $"RequestTimeout: {RequestTimeout}, Proxy: {(Proxy == null ? "-" : "set")}";
+            return $"Proxy: {(Proxy == null ? "-" : "set")}";
         }
     }
 }

CryptoExchange.Net/Objects/Options/RestExchangeOptions.cs

@@ -34,6 +34,11 @@ namespace CryptoExchange.Net.Objects.Options
             = new Version(1, 1);
 #endif
 
+        /// <summary>
+        /// Whether concurrent identical REST requests may share the same in-flight request when allowed by the request definition.
+        /// </summary>
+        public bool RequestCoalescingEnabled { get; set; } = true;
+
         /// <summary>
         /// Http client keep alive interval for keeping connections open. Only applied when using dotnet8.0 or higher and dependency injection
         /// </summary>
@@ -69,9 +74,12 @@ namespace CryptoExchange.Net.Objects.Options
             item.RequestTimeout = RequestTimeout;
             item.RateLimiterEnabled = RateLimiterEnabled;
             item.RateLimitingBehaviour = RateLimitingBehaviour;
+            item.RateLimitGroup = RateLimitGroup;
+            item.RateLimitAdmission = RateLimitAdmission;
             item.CachingEnabled = CachingEnabled;
             item.CachingMaxAge = CachingMaxAge;
             item.HttpVersion = HttpVersion;
+            item.RequestCoalescingEnabled = RequestCoalescingEnabled;
             item.HttpKeepAliveInterval = HttpKeepAliveInterval;
 #if NET5_0_OR_GREATER
             item.HttpMaxConnectionsPerServer = HttpMaxConnectionsPerServer;
@@ -104,6 +112,12 @@ namespace CryptoExchange.Net.Objects.Options
             target.Environment = Environment;
             return target;
         }
+
+        /// <inheritdoc />
+        public override string ToString()
+        {
+            return $"{base.ToString()} | Environment: {Environment.Name}";
+        }
     }
 
     /// <inheritdoc />
@@ -130,7 +144,7 @@ namespace CryptoExchange.Net.Objects.Options
         /// <inheritdoc />
         public override string ToString()
         {
-            return $"{base.ToString()}, ApiCredentials: {(ApiCredentials == null ? "-" : "set")}";
+            return $"{base.ToString()} | ApiCredentials: {(ApiCredentials == null ? "-" : "set")}";
         }
 
     }

CryptoExchange.Net/Objects/Options/SocketExchangeOptions.cs

@@ -104,6 +104,8 @@ namespace CryptoExchange.Net.Objects.Options
             item.RequestTimeout = RequestTimeout;
             item.RateLimitingBehaviour = RateLimitingBehaviour;
             item.RateLimiterEnabled = RateLimiterEnabled;
+            item.RateLimitGroup = RateLimitGroup;
+            item.RateLimitAdmission = RateLimitAdmission;
             item.ReceiveBufferSize = ReceiveBufferSize;
             return item;
         }
@@ -131,6 +133,12 @@ namespace CryptoExchange.Net.Objects.Options
             target.Environment = Environment;
             return target;
         }
+
+        /// <inheritdoc />
+        public override string ToString()
+        {
+            return $"{base.ToString()} | Environment: {Environment.Name}";
+        }
     }
 
     /// <summary>
@@ -158,7 +166,7 @@ namespace CryptoExchange.Net.Objects.Options
         /// <inheritdoc />
         public override string ToString()
         {
-            return $"{base.ToString()}, ApiCredentials: {(ApiCredentials == null ? "-" : "set")}";
+            return $"{base.ToString()} | ApiCredentials: {(ApiCredentials == null ? "-" : "set")}";
         }
     }
 }

CryptoExchange.Net/Objects/ParameterCollection.cs

@@ -1,343 +0,0 @@
-using CryptoExchange.Net.Attributes;
-using CryptoExchange.Net.Converters.SystemTextJson;
-using System;
-using System.Collections.Generic;
-using System.Diagnostics.CodeAnalysis;
-using System.Globalization;
-using System.Linq;
-
-namespace CryptoExchange.Net.Objects
-{
-    /// <summary>
-    /// Parameters collection
-    /// </summary>
-    public class ParameterCollection : Dictionary<string, object>
-    {
-        /// <inheritdoc />
-        public new void Add(string key, object value)
-        {
-            if (value == null)
-                throw new ArgumentNullException(key);
-
-            base.Add(key, value);
-        }
-
-        /// <summary>
-        /// Add an optional parameter. Not added if value is null
-        /// </summary>
-        /// <param name="key"></param>
-        /// <param name="value"></param>
-        public void AddOptional(string key, object? value)
-        {
-            if (value != null)
-                base.Add(key, value);
-        }
-
-        /// <summary>
-        /// Add a decimal value as string
-        /// </summary>
-        /// <param name="key"></param>
-        /// <param name="value"></param>
-        public void AddString(string key, decimal value)
-        {
-            base.Add(key, value.ToString(CultureInfo.InvariantCulture));
-        }
-
-        /// <summary>
-        /// Add a decimal value as string. Not added if value is null
-        /// </summary>
-        /// <param name="key"></param>
-        /// <param name="value"></param>
-        public void AddOptionalString(string key, decimal? value)
-        {
-            if (value != null)
-                base.Add(key, value.Value.ToString(CultureInfo.InvariantCulture));
-        }
-
-        /// <summary>
-        /// Add a int value as string
-        /// </summary>
-        /// <param name="key"></param>
-        /// <param name="value"></param>
-        public void AddString(string key, int value)
-        {
-            base.Add(key, value.ToString(CultureInfo.InvariantCulture));
-        }
-
-        /// <summary>
-        /// Add a int value as string. Not added if value is null
-        /// </summary>
-        /// <param name="key"></param>
-        /// <param name="value"></param>
-        public void AddOptionalString(string key, int? value)
-        {
-            if (value != null)
-                base.Add(key, value.Value.ToString(CultureInfo.InvariantCulture));
-        }
-
-        /// <summary>
-        /// Add a long value as string
-        /// </summary>
-        /// <param name="key"></param>
-        /// <param name="value"></param>
-        public void AddString(string key, long value)
-        {
-            base.Add(key, value.ToString(CultureInfo.InvariantCulture));
-        }
-
-        /// <summary>
-        /// Add a long value as string. Not added if value is null
-        /// </summary>
-        /// <param name="key"></param>
-        /// <param name="value"></param>
-        public void AddOptionalString(string key, long? value)
-        {
-            if (value != null)
-                base.Add(key, value.Value.ToString(CultureInfo.InvariantCulture));
-        }
-
-        /// <summary>
-        /// Add a DateTime value as string
-        /// </summary>
-        public void AddString(string key, DateTime value)
-        {
-            base.Add(key, value.ToString("yyyy-MM-ddTHH:mm:ssZ"));
-        }
-
-        /// <summary>
-        /// Add a DateTime value as string. Not added if value is null
-        /// </summary>
-        public void AddOptionalString(string key, DateTime? value)
-        {
-            if (value != null)
-                base.Add(key, value.Value.ToString("yyyy-MM-ddTHH:mm:ssZ"));
-        }
-
-        /// <summary>
-        /// Add a datetime value as milliseconds timestamp
-        /// </summary>
-        /// <param name="key"></param>
-        /// <param name="value"></param>
-        public void AddMilliseconds(string key, DateTime value)
-        {
-            base.Add(key, DateTimeConverter.ConvertToMilliseconds(value));
-        }
-
-        /// <summary>
-        /// Add a datetime value as milliseconds timestamp. Not added if value is null
-        /// </summary>
-        /// <param name="key"></param>
-        /// <param name="value"></param>
-        public void AddOptionalMilliseconds(string key, DateTime? value)
-        {
-            if (value != null)
-                base.Add(key, DateTimeConverter.ConvertToMilliseconds(value));
-        }
-
-        /// <summary>
-        /// Add a datetime value as milliseconds timestamp
-        /// </summary>
-        /// <param name="key"></param>
-        /// <param name="value"></param>
-        public void AddMillisecondsString(string key, DateTime value)
-        {
-            base.Add(key, DateTimeConverter.ConvertToMilliseconds(value).Value.ToString(CultureInfo.InvariantCulture));
-        }
-
-        /// <summary>
-        /// Add a datetime value as milliseconds timestamp. Not added if value is null
-        /// </summary>
-        /// <param name="key"></param>
-        /// <param name="value"></param>
-        public void AddOptionalMillisecondsString(string key, DateTime? value)
-        {
-            if (value != null)
-                base.Add(key, DateTimeConverter.ConvertToMilliseconds(value).Value.ToString(CultureInfo.InvariantCulture));
-        }
-
-        /// <summary>
-        /// Add a datetime value as seconds timestamp
-        /// </summary>
-        /// <param name="key"></param>
-        /// <param name="value"></param>
-        public void AddSeconds(string key, DateTime value)
-        {
-            base.Add(key, DateTimeConverter.ConvertToSeconds(value));
-        }
-
-        /// <summary>
-        /// Add a datetime value as seconds timestamp. Not added if value is null
-        /// </summary>
-        /// <param name="key"></param>
-        /// <param name="value"></param>
-        public void AddOptionalSeconds(string key, DateTime? value)
-        {
-            if (value != null)
-                base.Add(key, DateTimeConverter.ConvertToSeconds(value));
-        }
-
-        /// <summary>
-        /// Add a datetime value as string seconds timestamp
-        /// </summary>
-        /// <param name="key"></param>
-        /// <param name="value"></param>
-        public void AddSecondsString(string key, DateTime value)
-        {
-            base.Add(key, DateTimeConverter.ConvertToSeconds(value).ToString()!);
-        }
-
-        /// <summary>
-        /// Add a datetime value as string seconds timestamp. Not added if value is null
-        /// </summary>
-        /// <param name="key"></param>
-        /// <param name="value"></param>
-        public void AddOptionalSecondsString(string key, DateTime? value)
-        {
-            if (value != null)
-                base.Add(key, DateTimeConverter.ConvertToSeconds(value).ToString()!);
-        }
-
-        /// <summary>
-        /// Add an enum value as the string value as mapped using the <see cref="MapAttribute" />
-        /// </summary>
-#if NET5_0_OR_GREATER
-        public void AddEnum<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicParameterlessConstructor | DynamicallyAccessedMemberTypes.PublicFields)] T>(string key, T value)
-#else
-        public void AddEnum<T>(string key, T value)
-#endif
-            where T : struct, Enum
-        {
-            base.Add(key, EnumConverter<T>.GetString(value)!);
-        }
-
-        /// <summary>
-        /// Add an enum value as the string value as mapped using the <see cref="MapAttribute" />
-        /// </summary>
-        /// <param name="key"></param>
-        /// <param name="value"></param>
-#if NET5_0_OR_GREATER
-        public void AddEnumAsInt<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicParameterlessConstructor | DynamicallyAccessedMemberTypes.PublicFields)] T>(string key, T value)
-#else
-        public void AddEnumAsInt<T>(string key, T value)
-#endif
-            where T : struct, Enum
-        {
-            var stringVal = EnumConverter<T>.GetString(value)!;
-            base.Add(key, int.Parse(stringVal)!);
-        }
-
-        /// <summary>
-        /// Add an enum value as the string value as mapped using the <see cref="MapAttribute" />. Not added if value is null
-        /// </summary>
-        /// <param name="key"></param>
-        /// <param name="value"></param>
-#if NET5_0_OR_GREATER
-        public void AddOptionalEnum<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicParameterlessConstructor | DynamicallyAccessedMemberTypes.PublicFields)] T>(string key, T? value)
-#else
-        public void AddOptionalEnum<T>(string key, T? value)
-#endif
-            where T : struct, Enum
-        {
-            if (value != null)
-                base.Add(key, EnumConverter<T>.GetString(value));
-        }
-
-        /// <summary>
-        /// Add an enum value as the string value as mapped using the <see cref="MapAttribute" />. Not added if value is null
-        /// </summary>
-#if NET5_0_OR_GREATER
-        public void AddOptionalEnumAsInt<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicParameterlessConstructor | DynamicallyAccessedMemberTypes.PublicFields)] T>(string key, T? value)
-#else
-        public void AddOptionalEnumAsInt<T>(string key, T? value)
-#endif
-            where T : struct, Enum
-        {
-            if (value != null)
-            {
-                var stringVal = EnumConverter<T>.GetString(value);
-                base.Add(key, int.Parse(stringVal));
-            }
-        }
-        
-        /// <summary>
-        /// Add key as comma separated values
-        /// </summary>
-        public void AddCommaSeparated(string key, IEnumerable<string> values)
-        {
-            base.Add(key, string.Join(",", values));
-        }
-
-        /// <summary>
-        /// Add key as comma separated values if there are values provided
-        /// </summary>
-        public void AddOptionalCommaSeparated(string key, IEnumerable<string>? values)
-        {
-            if (values == null || !values.Any())
-                return;
-
-            base.Add(key, string.Join(",", values));
-        }
-
-        /// <summary>
-        /// Add key as comma separated values
-        /// </summary>
-#if NET5_0_OR_GREATER
-        public void AddCommaSeparated<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicParameterlessConstructor | DynamicallyAccessedMemberTypes.PublicFields)] T>(string key, IEnumerable<T> values)
-#else
-        public void AddCommaSeparated<T>(string key, IEnumerable<T> values)
-#endif
-            where T : struct, Enum
-        {
-            base.Add(key, string.Join(",", values.Select(x => EnumConverter.GetString(x))));
-        }
-
-        /// <summary>
-        /// Add key as comma separated values if there are values provided
-        /// </summary>
-#if NET5_0_OR_GREATER
-        public void AddOptionalCommaSeparated<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicParameterlessConstructor | DynamicallyAccessedMemberTypes.PublicFields)] T>(string key, IEnumerable<T>? values)
-#else
-        public void AddOptionalCommaSeparated<T>(string key, IEnumerable<T>? values)
-#endif
-            where T : struct, Enum
-        {
-            if (values == null || !values.Any())
-                return;
-
-            base.Add(key, string.Join(",", values.Select(x => EnumConverter.GetString(x))));
-        }
-
-        /// <summary>
-        /// Add key as boolean lower case value
-        /// </summary>
-        public void AddBoolString(string key, bool value)
-        {
-            base.Add(key, value.ToString().ToLower());
-        }
-
-        /// <summary>
-        /// Add key as boolean lower case value if it's not null
-        /// </summary>
-        public void AddOptionalBoolString(string key, bool? value)
-        {
-            if (value == null)
-                return;
-
-            base.Add(key, value.ToString()!.ToLower());
-        }
-
-
-        /// <summary>
-        /// Set the request body. Can be used to specify a simple value or array as the body instead of an object
-        /// </summary>
-        /// <param name="body">Body to set</param>
-        /// <exception cref="InvalidOperationException"></exception>
-        public void SetBody(object body)
-        {
-            if (this.Any())
-                throw new InvalidOperationException("Can't set body when other parameters already specified");
-
-            base.Add(Constants.BodyPlaceHolderKey, body);
-        }
-    }
-}

CryptoExchange.Net/Objects/ParameterSerializationSettings.cs

@@ -0,0 +1,146 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace CryptoExchange.Net.Objects
+{
+    /// <summary>
+    /// Settings for parameter serialization
+    /// </summary>
+    public class ParameterSerializationSettings
+    {
+        /// <summary>
+        /// Default serialization settings
+        /// </summary>
+        public static ParameterSerializationSettings Default { get; } = new ParameterSerializationSettings();
+
+        /// <summary>
+        /// Whether to sort the parameters
+        /// </summary>
+        public bool Sort { get; set; } = true;
+        /// <summary>
+        /// The parameter comparer when sorting
+        /// </summary>
+        public IComparer<string>? SortComparer { get; set; }
+        /// <summary>
+        /// Decimal serialization type
+        /// </summary>
+        public DecimalSerialization Decimal { get; set; } = DecimalSerialization.Number;
+        /// <summary>
+        /// DateTime serialization type
+        /// </summary>
+        public DateTimeSerialization DateTimes { get; set; } = DateTimeSerialization.MillisecondsNumber;
+        /// <summary>
+        /// Boolean serialization type
+        /// </summary>
+        public BoolSerialization Bool { get; set; } = BoolSerialization.Bool;
+        /// <summary>
+        /// Integer serialization type
+        /// </summary>
+        public IntegerSerialization Integer { get; set; } = IntegerSerialization.Number;
+        /// <summary>
+        /// Enum serialization type
+        /// </summary>
+        public EnumSerialization Enum { get; set; } = EnumSerialization.String;
+        /// <summary>
+        /// Array serialization type
+        /// </summary>
+        public ArrayParametersSerialization Array { get; set; } = ArrayParametersSerialization.Array;
+    }
+
+
+    /// <summary>
+    /// Type of decimal value serialization
+    /// </summary>
+    public enum DecimalSerialization
+    {
+        /// <summary>
+        /// Decimals should be serialized as numbers
+        /// </summary>
+        Number,
+        /// <summary>
+        /// Decimals should be strings
+        /// </summary>
+        String
+    }
+
+    /// <summary>
+    /// Type of DateTime value serialization
+    /// </summary>
+    public enum DateTimeSerialization
+    {
+        /// <summary>
+        /// DateTimes should be serialized as milliseconds number
+        /// </summary>
+        MillisecondsNumber,
+        /// <summary>
+        /// DateTimes should be serialized as milliseconds string
+        /// </summary>
+        MillisecondsString,
+        /// <summary>
+        /// DateTimes should be serialized as seconds number
+        /// </summary>
+        SecondsNumber,
+        /// <summary>
+        /// DateTimes should be serialized as seconds string
+        /// </summary>
+        SecondsString,
+        /// <summary>
+        /// DateTimes should be serialized as microseconds number
+        /// </summary>
+        MicrosecondsNumber,
+        /// <summary>
+        /// DateTimes should be serialized as microseconds string
+        /// </summary>
+        MicrosecondsString,
+        /// <summary>
+        /// DateTimes should be serialized as ISO 8601 string
+        /// </summary>
+        Rfc3339String
+    }
+
+    /// <summary>
+    /// Type of boolean value serialization
+    /// </summary>
+    public enum BoolSerialization
+    {
+        /// <summary>
+        /// Booleans should be serialized as bool values
+        /// </summary>
+        Bool,
+        /// <summary>
+        /// Booleans should be serialized as strings
+        /// </summary>
+        String
+    }
+
+    /// <summary>
+    /// Type of integer value serialization
+    /// </summary>
+    public enum IntegerSerialization
+    {
+        /// <summary>
+        /// Integers should be serialized as integer values
+        /// </summary>
+        Number,
+        /// <summary>
+        /// Integers should be serialized as strings
+        /// </summary>
+        String
+    }
+
+    /// <summary>
+    /// Type of enum value serialization
+    /// </summary>
+    public enum EnumSerialization
+    {
+        /// <summary>
+        /// Enums should be serialized as integer values
+        /// </summary>
+        Number,
+        /// <summary>
+        /// Enums should be serialized as strings
+        /// </summary>
+        String
+    }
+}

CryptoExchange.Net/Objects/Parameters.cs

@@ -0,0 +1,375 @@
+using CryptoExchange.Net.Attributes;
+using CryptoExchange.Net.Converters.SystemTextJson;
+using CryptoExchange.Net.Interfaces;
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
+using System.Globalization;
+using System.Linq;
+
+namespace CryptoExchange.Net.Objects
+{
+    /// <summary>
+    /// Set of parameters
+    /// </summary>
+    public class Parameters : IDictionary<string, object>
+    {
+        private readonly ParameterSerializationSettings _serializationSettings;
+        private IDictionary<string, object> _parameters;
+        private object? _value;
+
+        /// <inheritdoc />
+        public object? BodyValue => _value;
+
+        /// <inheritdoc />
+        public ICollection<string> Keys => _parameters.Keys;
+
+        /// <inheritdoc />
+        public ICollection<object> Values => _parameters.Values;
+
+        /// <inheritdoc />
+        public int Count => _parameters.Count;
+
+        /// <inheritdoc />
+        public bool IsReadOnly => _parameters.IsReadOnly;
+
+        /// <summary>
+        /// Whether any parameters are defined
+        /// </summary>
+        public bool Empty => _parameters.Count == 0 && _value == null;
+
+        /// <inheritdoc />
+        public object this[string key] { get => _parameters[key]; set => _parameters[key] = value; }
+
+        /// <summary>
+        /// ctor
+        /// </summary>
+        /// <param name="serializationSettings">Serialization settings</param>
+        public Parameters(ParameterSerializationSettings serializationSettings)
+        {
+            _serializationSettings = serializationSettings;
+            if (_serializationSettings.Sort)
+                _parameters = new SortedDictionary<string, object>(_serializationSettings.SortComparer);
+            else
+                _parameters = new Dictionary<string, object>();
+
+        }
+
+        /// <summary>
+        /// ctor
+        /// </summary>
+        /// <param name="serializationSettings">Serialization settings</param>
+        /// <param name="value">Body value</param>
+        public Parameters(object value, ParameterSerializationSettings serializationSettings)
+        {
+            _parameters = new Dictionary<string, object>();
+            _serializationSettings = serializationSettings;
+            _value = value;
+        }
+
+        /// <summary>
+        /// Add a short value if it is not null
+        /// </summary>
+        public void Add(string key, short? value, IntegerSerialization? serialization = null)
+        {
+            if (value == null)
+                return;
+
+            Add(key, value.Value, serialization);
+        }
+
+        /// <summary>
+        /// Add a short value
+        /// </summary>
+        public void Add(string key, short value, IntegerSerialization? serialization = null)
+        {
+            var serializationToUse = serialization ?? _serializationSettings.Integer;
+            if (serializationToUse == IntegerSerialization.String)
+                _parameters.Add(key, value.ToString(CultureInfo.InvariantCulture));
+            else if (serializationToUse == IntegerSerialization.Number)
+                _parameters.Add(key, value);
+            else
+                throw new ArgumentException("Unknown Integer serialization setting");
+        }
+
+        /// <summary>
+        /// Add an int value if it is not null
+        /// </summary>
+        public void Add(string key, int? value, IntegerSerialization? serialization = null)
+        {
+            if (value == null)
+                return;
+
+            Add(key, value.Value, serialization);
+        }
+
+        /// <summary>
+        /// Add an int value
+        /// </summary>
+        public void Add(string key, int value, IntegerSerialization? serialization = null)
+        {
+            var serializationToUse = serialization ?? _serializationSettings.Integer;
+            if (serializationToUse == IntegerSerialization.String)
+                _parameters.Add(key, value.ToString(CultureInfo.InvariantCulture));
+            else if (serializationToUse == IntegerSerialization.Number)
+                _parameters.Add(key, value);
+            else
+                throw new ArgumentException("Unknown Integer serialization setting");
+        }
+
+        /// <summary>
+        /// Add a long value if it is not null
+        /// </summary>
+        public void Add(string key, long? value, IntegerSerialization? serialization = null)
+        {
+            if (value == null)
+                return;
+
+            Add(key, value.Value, serialization);
+        }
+
+        /// <summary>
+        /// Add a long value
+        /// </summary>
+        public void Add(string key, long value, IntegerSerialization? serialization = null)
+        {
+            var serializationToUse = serialization ?? _serializationSettings.Integer;
+            if (serializationToUse == IntegerSerialization.String)
+                _parameters.Add(key, value.ToString(CultureInfo.InvariantCulture));
+            else if (serializationToUse == IntegerSerialization.Number)
+                _parameters.Add(key, value);
+            else
+                throw new ArgumentException("Unknown Integer serialization setting");
+        }
+
+        /// <summary>
+        /// Add a decimal value if it is not null
+        /// </summary>
+        public void Add(string key, decimal? value, DecimalSerialization? serialization = null)
+        {
+            if (value == null)
+                return;
+
+            Add(key, value.Value, serialization);
+        }
+
+        /// <summary>
+        /// Add a decimal value
+        /// </summary>
+        public void Add(string key, decimal value, DecimalSerialization? serialization = null)
+        {
+            var serializationToUse = serialization ?? _serializationSettings.Decimal;
+            if (serializationToUse == DecimalSerialization.String)
+                _parameters.Add(key, value.ToString(CultureInfo.InvariantCulture));
+            else if (serializationToUse == DecimalSerialization.Number)
+                _parameters.Add(key, value);
+            else
+                throw new ArgumentException("Unknown Decimal serialization setting");
+        }
+
+        /// <summary>
+        /// Add a double value if it is not null
+        /// </summary>
+        public void Add(string key, double? value, DecimalSerialization? serialization = null)
+        {
+            if (value == null)
+                return;
+
+            Add(key, value.Value, serialization);
+        }
+
+        /// <summary>
+        /// Add a double value
+        /// </summary>
+        public void Add(string key, double value, DecimalSerialization? serialization = null)
+        {
+            var serializationToUse = serialization ?? _serializationSettings.Decimal;
+            if (serializationToUse == DecimalSerialization.String)
+                _parameters.Add(key, value.ToString(CultureInfo.InvariantCulture));
+            else if (serializationToUse == DecimalSerialization.Number)
+                _parameters.Add(key, value);
+            else
+                throw new ArgumentException("Unknown Decimal serialization setting");
+        }
+
+        /// <summary>
+        /// Add a bool value if it is not null
+        /// </summary>
+        public void Add(string key, bool? value, BoolSerialization? serialization = null)
+        {
+            if (value == null)
+                return;
+
+            Add(key, value.Value, serialization);
+        }
+
+        /// <summary>
+        /// Add a bool value
+        /// </summary>
+        public void Add(string key, bool value, BoolSerialization? serialization = null)
+        {
+            var serializationToUse = serialization ?? _serializationSettings.Bool;
+            if (serializationToUse == BoolSerialization.String)
+                _parameters.Add(key, value.ToString(CultureInfo.InvariantCulture).ToLowerInvariant());
+            else if (serializationToUse == BoolSerialization.Bool)
+                _parameters.Add(key, value);
+            else
+                throw new ArgumentException("Unknown Bool serialization setting");
+        }
+
+        /// <summary>
+        /// Add key as comma separated values if there are values provided
+        /// </summary>
+        public void AddCommaSeparated(string key, IEnumerable<string>? values)
+        {
+            if (values == null || !values.Any())
+                return;
+
+            _parameters.Add(key, string.Join(",", values));
+        }
+
+        /// <summary>
+        /// Add key as comma separated values
+        /// </summary>
+#if NET5_0_OR_GREATER
+        public void AddCommaSeparated<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicParameterlessConstructor | DynamicallyAccessedMemberTypes.PublicFields)] T>(string key, IEnumerable<T>? values)
+#else
+        public void AddCommaSeparated<T>(string key, IEnumerable<T>? values)
+#endif
+            where T : struct, Enum
+        {
+            if (values == null || !values.Any())
+                return;
+
+            _parameters.Add(key, string.Join(",", values.Select(x => EnumConverter.GetString(x))));
+        }
+
+        /// <summary>
+        /// Add an enum value if it is not null
+        /// </summary>
+        public void Add<
+#if NET5_0_OR_GREATER
+            [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicParameterlessConstructor | DynamicallyAccessedMemberTypes.PublicFields)]
+# endif
+            T>(string key, T? value, EnumSerialization? serialization = null)
+            where T : struct, Enum
+
+        {
+            if (value == null)
+                return;
+
+            Add(key, value.Value, serialization);
+        }
+
+        /// <summary>
+        /// Add a enum value
+        /// </summary>
+        public void Add<
+#if NET5_0_OR_GREATER
+            [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicParameterlessConstructor | DynamicallyAccessedMemberTypes.PublicFields)]
+#endif
+            T>(string key, T value, EnumSerialization? serialization = null)
+            where T : struct, Enum
+        {
+            var serializationToUse = serialization ?? _serializationSettings.Enum;
+            if (serializationToUse == EnumSerialization.String)
+                _parameters.Add(key, EnumConverter<T>.GetString(value));
+            else if (serializationToUse == EnumSerialization.Number)
+                _parameters.Add(key, int.Parse(EnumConverter<T>.GetString(value), CultureInfo.InvariantCulture));
+            else
+                throw new ArgumentException("Unknown Integer serialization setting");
+        }
+
+        /// <summary>
+        /// Add a DateTime value if it is not null
+        /// </summary>
+        public void Add(string key, DateTime? value, DateTimeSerialization? serialization = null)
+        {
+            if (value == null)
+                return;
+
+            Add(key, value.Value, serialization);
+        }
+
+        /// <summary>
+        /// Add a DateTime value
+        /// </summary>
+        public void Add(string key, DateTime value, DateTimeSerialization? serialization = null)
+        {
+            var serializationToUse = serialization ?? _serializationSettings.DateTimes;
+            if (serializationToUse == DateTimeSerialization.MillisecondsNumber)
+                _parameters.Add(key, DateTimeConverter.ConvertToMilliseconds(value));
+            else if (serializationToUse == DateTimeSerialization.MillisecondsString)
+                _parameters.Add(key, DateTimeConverter.ConvertToMilliseconds(value).Value.ToString(CultureInfo.InvariantCulture));
+            else if (serializationToUse == DateTimeSerialization.SecondsNumber)
+                _parameters.Add(key, DateTimeConverter.ConvertToSeconds(value));
+            else if (serializationToUse == DateTimeSerialization.SecondsString)
+                _parameters.Add(key, DateTimeConverter.ConvertToSeconds(value).Value.ToString(CultureInfo.InvariantCulture));
+            else if (serializationToUse == DateTimeSerialization.MicrosecondsNumber)
+                _parameters.Add(key, DateTimeConverter.ConvertToMicroseconds(value));
+            else if (serializationToUse == DateTimeSerialization.MicrosecondsString)
+                _parameters.Add(key, DateTimeConverter.ConvertToMicroseconds(value).Value.ToString(CultureInfo.InvariantCulture));
+            else if (serializationToUse == DateTimeSerialization.Rfc3339String)
+                _parameters.Add(key, value.ToRfc3339String());
+            else
+                throw new ArgumentException("Unknown DateTime serialization setting");
+        }
+
+        /// <summary>
+        /// Add a string value if it is not null
+        /// </summary>
+        public void Add(string key, string? value)
+        {
+            if (value == null)
+                return;
+
+            _parameters.Add(key, value);
+        }
+
+        /// <summary>
+        /// Add an array of values if there are values provided
+        /// </summary>
+        public void AddArray<T>(string key, IEnumerable<T>? values)
+        {
+            if (values == null || !values.Any())
+                return;
+
+            _parameters.Add(key, values is T[] arr ? arr : values.ToArray());
+        }
+
+        /// <summary>
+        /// Add a raw object value if it is not null
+        /// </summary>
+        public void AddRaw(string key, object? value)
+        {
+            if (value == null)
+                return;
+
+            _parameters.Add(key, value);
+        }
+
+        /// <inheritdoc />
+        public void Add(string key, object value) => _parameters.Add(key, value);
+        /// <inheritdoc />
+        public bool ContainsKey(string key) => _parameters.ContainsKey(key);
+        /// <inheritdoc />
+        public bool Remove(string key) => _parameters.Remove(key);
+        /// <inheritdoc />
+        public bool TryGetValue(string key, out object value) => _parameters.TryGetValue(key, out value!);
+        /// <inheritdoc />
+        public void Add(KeyValuePair<string, object> item) => _parameters.Add(item.Key, item.Value);
+        /// <inheritdoc />
+        public void Clear() => _parameters.Clear();
+        /// <inheritdoc />
+        public bool Contains(KeyValuePair<string, object> item) => _parameters.ContainsKey(item.Key) && _parameters[item.Key] == item.Value;
+        /// <inheritdoc />
+        public void CopyTo(KeyValuePair<string, object>[] array, int arrayIndex) => _parameters.CopyTo(array, arrayIndex);
+        /// <inheritdoc />
+        public bool Remove(KeyValuePair<string, object> item) => _parameters.Remove(item.Key);
+        /// <inheritdoc />
+        public IEnumerator<KeyValuePair<string, object>> GetEnumerator() => _parameters.GetEnumerator();
+        /// <inheritdoc />
+        IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
+    }
+}

CryptoExchange.Net/Objects/PlatformInfo.cs

@@ -33,11 +33,23 @@
         /// Centralization type
         /// </summary>
         public CentralizationType CentralizationType { get; }
+        /// <summary>
+        /// Supported environments
+        /// </summary>
+        public string[] SupportedEnvironments { get; }
 
         /// <summary>
         /// ctor
         /// </summary>
-        public PlatformInfo(string id, string displayName, string logo, string url, string[] apiDocsUrl, PlatformType platformType, CentralizationType centralizationType)
+        public PlatformInfo(
+            string id,
+            string displayName,
+            string logo, 
+            string url, 
+            string[] apiDocsUrl,
+            PlatformType platformType,
+            CentralizationType centralizationType,
+            string[] supportedEnvironments)
         {
             Id = id;
             DisplayName = displayName;
@@ -46,6 +58,7 @@
             ApiDocsUrl = apiDocsUrl;
             PlatformType = platformType;
             CentralizationType = centralizationType;
+            SupportedEnvironments = supportedEnvironments;
         }
     }
 }

CryptoExchange.Net/Objects/RequestCoalescer.cs

@@ -0,0 +1,277 @@
+using CryptoExchange.Net.Logging.Extensions;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace CryptoExchange.Net.Objects
+{
+    /// <summary>
+    /// Request coalescer, used to detect multiple identical requests and wait for and return only a single actual request result
+    /// </summary>
+    public class RequestCoalescer
+    {
+        private sealed class RequestEntry
+        {
+            public RequestCoalescingKey Key { get; }
+
+            public CancellationTokenSource CancellationSource { get; } = new();
+
+            public Lazy<Task<object>> Request { get; set; } = null!;
+
+            public int ListenerCount { get; set; }
+
+            public bool Completed { get; set; }
+
+            public bool CancellationInProgress { get; set; }
+
+            public bool Disposed { get; set; }
+
+            public RequestEntry(RequestCoalescingKey key)
+            {
+                Key = key;
+            }
+        }
+
+        private readonly object _sync = new();
+        private readonly ILogger _logger;
+
+        private readonly Dictionary<RequestCoalescingKey, RequestEntry> _requests = new();
+
+        /// <summary>
+        /// ctor
+        /// </summary>
+        public RequestCoalescer(ILogger logger)
+        {
+            _logger = logger;
+        }
+
+        /// <summary>
+        /// Execute a request, coalescing identical requests into a single request
+        /// </summary>
+        public Task<TResult> ExecuteAsync<TResult>(
+            RequestCoalescingKey key,
+            Func<CancellationToken, Task<TResult>> requestFactory,
+            Func<TResult> cancellationResultFactory,
+            CancellationToken cancellationToken)
+        {
+            if (cancellationToken.IsCancellationRequested)
+                return Task.FromResult(cancellationResultFactory());
+
+            RequestEntry entry;
+            bool joined;
+
+            lock (_sync)
+            {
+                joined = _requests.TryGetValue(key, out entry!);
+
+                if (!joined)
+                {
+                    entry = CreateEntry(key, requestFactory);
+                    _requests.Add(key, entry);
+                }
+
+                entry.ListenerCount++;
+            }
+
+            if (joined)
+                _logger.RestApiRequestsJoined(key.Method, key.Url);
+
+            return WaitAsync(
+                entry,
+                cancellationResultFactory,
+                cancellationToken);
+        }
+
+        private RequestEntry CreateEntry<TResult>(
+            RequestCoalescingKey key,
+            Func<CancellationToken, Task<TResult>> requestFactory)
+        {
+            var entry = new RequestEntry(key);
+
+            entry.Request = new Lazy<Task<object>>(
+                () => ExecuteCoreAsync(
+                    entry,
+                    async requestCancellationToken =>
+                        (await requestFactory(requestCancellationToken).ConfigureAwait(false))!),
+                LazyThreadSafetyMode.ExecutionAndPublication);
+
+            return entry;
+        }
+
+        private async Task<object> ExecuteCoreAsync(
+            RequestEntry entry,
+            Func<CancellationToken, Task<object>> requestFactory)
+        {
+            try
+            {
+                return await requestFactory(entry.CancellationSource.Token).ConfigureAwait(false);
+            }
+            finally
+            {
+                CompleteRequest(entry);
+            }
+        }
+
+        private async Task<TResult> WaitAsync<TResult>(
+            RequestEntry entry,
+            Func<TResult> cancellationResultFactory,
+            CancellationToken cancellationToken)
+        {
+            try
+            {
+                var requestTask = entry.Request.Value;
+
+                if (!cancellationToken.CanBeCanceled)
+                    return (TResult)await requestTask.ConfigureAwait(false);
+
+                var cancellationCompletion = new TaskCompletionSource<bool>(TaskCreationOptions.RunContinuationsAsynchronously);
+
+                using (cancellationToken.Register(
+                    state => ((TaskCompletionSource<bool>)state!).TrySetResult(true),
+                    cancellationCompletion))
+                {
+                    var completedTask = await Task.WhenAny(requestTask, cancellationCompletion.Task).ConfigureAwait(false);
+                    if (completedTask != requestTask)
+                        return cancellationResultFactory();
+                }
+
+                return (TResult)await requestTask.ConfigureAwait(false);
+            }
+            finally
+            {
+                ReleaseListener(entry);
+            }
+        }
+
+        private void ReleaseListener(RequestEntry entry)
+        {
+            var cancelRequest = false;
+            var disposeCancellationSource = false;
+
+            lock (_sync)
+            {
+                entry.ListenerCount--;
+
+                if (entry.ListenerCount == 0)
+                {
+                    if (!entry.Completed)
+                    {
+                        // Remove the entry before canceling it. A caller arriving
+                        // after this point must create a new physical request
+                        // instead of joining one that is being canceled.
+                        RemoveEntry(entry);
+
+                        entry.CancellationInProgress = true;
+                        cancelRequest = true;
+                    }
+                    else if (!entry.Disposed)
+                    {
+                        entry.Disposed = true;
+                        disposeCancellationSource = true;
+                    }
+                }
+            }
+
+            if (cancelRequest)
+            {
+                try
+                {
+                    entry.CancellationSource.Cancel();
+                }
+                catch (Exception exception)
+                {
+                    // Cancellation callbacks are external to the coalescer and
+                    // must not cause an exception to escape the library.
+                    _logger.LogWarning(
+                        exception,
+                        "Error canceling in-flight request {Method} {Url}",
+                        entry.Key.Method,
+                        entry.Key.Url);
+                }
+                finally
+                {
+                    CompleteCancellation(entry);
+                }
+            }
+            else if (disposeCancellationSource)
+            {
+                entry.CancellationSource.Dispose();
+            }
+        }
+
+        private void CompleteCancellation(RequestEntry entry)
+        {
+            var disposeCancellationSource = false;
+
+            lock (_sync)
+            {
+                entry.CancellationInProgress = false;
+
+                if (entry.Completed
+                    && entry.ListenerCount == 0
+                    && !entry.Disposed)
+                {
+                    entry.Disposed = true;
+                    disposeCancellationSource = true;
+                }
+            }
+
+            if (disposeCancellationSource)
+                entry.CancellationSource.Dispose();
+        }
+
+        private void CompleteRequest(RequestEntry entry)
+        {
+            var disposeCancellationSource = false;
+
+            lock (_sync)
+            {
+                entry.Completed = true;
+
+                // Only remove this specific entry. If all listeners canceled,
+                // a replacement request may already have been created for the
+                // same key.
+                RemoveEntry(entry);
+
+                if (entry.ListenerCount == 0
+                    && !entry.CancellationInProgress
+                    && !entry.Disposed)
+                {
+                    entry.Disposed = true;
+                    disposeCancellationSource = true;
+                }
+            }
+
+            if (disposeCancellationSource)
+                entry.CancellationSource.Dispose();
+        }
+
+        /// <summary>
+        /// Remove an entry when it is still the current entry for its key.
+        /// Must only be called while holding <see cref="_sync"/>.
+        /// </summary>
+        private void RemoveEntry(RequestEntry entry)
+        {
+            if (_requests.TryGetValue(entry.Key, out var current)
+                && ReferenceEquals(current, entry))
+            {
+                _requests.Remove(entry.Key);
+            }
+        }
+    }
+
+    /// <summary>
+    /// Key used to identify identical requests for coalescing
+    /// </summary>
+    /// <param name="Method">Request method</param>
+    /// <param name="Url">Request URL</param>
+    /// <param name="Parameters">Request parameter string</param>
+    /// <param name="ResponseType">Response type</param>
+    public sealed record RequestCoalescingKey(
+        string Method,
+        string Url,
+        string? Parameters,
+        Type ResponseType);
+}

CryptoExchange.Net/Objects/RequestDefinition.cs

@@ -9,9 +9,14 @@ namespace CryptoExchange.Net.Objects
     public class RequestDefinition
     {
         private string? _stringRep;
+        private string? _fullUrl;
 
         // Basics
 
+        /// <summary>
+        /// Base address of the request
+        /// </summary>
+        public string BaseAddress { get; set; }
         /// <summary>
         /// Path of the request
         /// </summary>
@@ -77,13 +82,36 @@ namespace CryptoExchange.Net.Objects
         /// </summary>
         public bool? ForcePathEndWithSlash { get; set; }
 
+        /// <summary>
+        /// Full url, host + path
+        /// </summary>
+        public string FullUrl
+        {
+            get
+            {
+                if (_fullUrl != null) 
+                    return _fullUrl;
+
+                var result = BaseAddress.AppendPath(Path);
+                if (ForcePathEndWithSlash == true && !result.EndsWith("/"))
+                    result += "/";
+
+                _fullUrl = result;
+                return _fullUrl;
+            }   
+        }
+
+        /// <summary>
+        /// Whether concurrent identical requests should be prevented from sharing the same request/response
+        /// </summary>
+        public bool PreventRequestCoalescing { get; set; }
+
         /// <summary>
         /// ctor
         /// </summary>
-        /// <param name="path"></param>
-        /// <param name="method"></param>
-        public RequestDefinition(string path, HttpMethod method)
+        public RequestDefinition(string baseAddress, string path, HttpMethod method)
         {
+            BaseAddress = baseAddress;
             Path = path;
             Method = method;
 

CryptoExchange.Net/Objects/RequestDefinitionCache.cs

@@ -1,5 +1,6 @@
 using CryptoExchange.Net.RateLimiting.Interfaces;
 using System.Collections.Concurrent;
+using System.IO;
 using System.Net.Http;
 
 namespace CryptoExchange.Net.Objects
@@ -15,27 +16,30 @@ namespace CryptoExchange.Net.Objects
         /// Get a definition if it is already in the cache or create a new definition and add it to the cache
         /// </summary>
         /// <param name="method">The HttpMethod</param>
+        /// <param name="baseAddress">The base address/host</param>
         /// <param name="path">Endpoint path</param>
         /// <param name="authenticated">Endpoint is authenticated</param>
         /// <returns></returns>
-        public RequestDefinition GetOrCreate(HttpMethod method, string path, bool authenticated = false)
-            => GetOrCreate(method, path, null, 0, authenticated, null, null, null, null, null);
+        public RequestDefinition GetOrCreate(HttpMethod method, string baseAddress, string path, bool authenticated = false)
+            => GetOrCreate(method, baseAddress, path, null, 0, authenticated, null, null, null, null, null, null, null);
 
         /// <summary>
         /// Get a definition if it is already in the cache or create a new definition and add it to the cache
         /// </summary>
         /// <param name="method">The HttpMethod</param>
+        /// <param name="baseAddress">The base address/host</param>
         /// <param name="path">Endpoint path</param>
         /// <param name="rateLimitGate">The rate limit gate</param>
         /// <param name="weight">Request weight</param>
         /// <param name="authenticated">Endpoint is authenticated</param>
         /// <returns></returns>
-        public RequestDefinition GetOrCreate(HttpMethod method, string path, IRateLimitGate rateLimitGate, int weight = 1, bool authenticated = false)
-            => GetOrCreate(method, path, rateLimitGate,  weight, authenticated, null, null, null, null, null);
+        public RequestDefinition GetOrCreate(HttpMethod method, string baseAddress, string path, IRateLimitGate rateLimitGate, int weight = 1, bool authenticated = false)
+            => GetOrCreate(method, baseAddress, path, rateLimitGate,  weight, authenticated, null, null, null, null, null, null, null);
 
         /// <summary>
         /// Get a definition if it is already in the cache or create a new definition and add it to the cache
         /// </summary>
+        /// <param name="baseAddress">The base address/host</param>
         /// <param name="method">The HttpMethod</param>
         /// <param name="path">Endpoint path</param>
         /// <param name="rateLimitGate">The rate limit gate</param>
@@ -48,9 +52,12 @@ namespace CryptoExchange.Net.Objects
         /// <param name="preventCaching">Prevent request caching</param>
         /// <param name="tryParseOnNonSuccess">Try parse the response even when status is not success</param>
         /// <param name="forcePathEndWithSlash">Force trailing `/`</param>
+        /// <param name="identifier">Optional request identifier override</param>
+        /// <param name="preventRequestCoalescing">Whether concurrent identical requests should be prevented from sharing the same request/response</param>
         /// <returns></returns>
         public RequestDefinition GetOrCreate(
             HttpMethod method,
+            string baseAddress,
             string path,
             IRateLimitGate? rateLimitGate,
             int weight,
@@ -61,45 +68,14 @@ namespace CryptoExchange.Net.Objects
             ArrayParametersSerialization? arraySerialization = null,
             bool? preventCaching = null,
             bool? tryParseOnNonSuccess = null,
-            bool? forcePathEndWithSlash = null)
-            => GetOrCreate(method + path, method, path, rateLimitGate, weight, authenticated, limitGuard, requestBodyFormat, parameterPosition, arraySerialization, preventCaching, tryParseOnNonSuccess, forcePathEndWithSlash);
-
-        /// <summary>
-        /// Get a definition if it is already in the cache or create a new definition and add it to the cache
-        /// </summary>
-        /// <param name="identifier">Request identifier</param>
-        /// <param name="method">The HttpMethod</param>
-        /// <param name="path">Endpoint path</param>
-        /// <param name="rateLimitGate">The rate limit gate</param>
-        /// <param name="limitGuard">The rate limit guard for this specific endpoint</param>
-        /// <param name="weight">Request weight</param>
-        /// <param name="authenticated">Endpoint is authenticated</param>
-        /// <param name="requestBodyFormat">Request body format</param>
-        /// <param name="parameterPosition">Parameter position</param>
-        /// <param name="arraySerialization">Array serialization type</param>
-        /// <param name="preventCaching">Prevent request caching</param>
-        /// <param name="tryParseOnNonSuccess">Try parse the response even when status is not success</param>
-        /// <param name="forcePathEndWithSlash">Force trailing `/`</param>
-        /// <returns></returns>
-        public RequestDefinition GetOrCreate(
-            string identifier,
-            HttpMethod method,
-            string path,
-            IRateLimitGate? rateLimitGate,
-            int weight,
-            bool authenticated,
-            IRateLimitGuard? limitGuard = null,
-            RequestBodyFormat? requestBodyFormat = null,
-            HttpMethodParameterPosition? parameterPosition = null,
-            ArrayParametersSerialization? arraySerialization = null,
-            bool? preventCaching = null,
-            bool? tryParseOnNonSuccess = null,
-            bool? forcePathEndWithSlash = null)
+            bool? forcePathEndWithSlash = null,
+            string? identifier = null,
+            bool? preventRequestCoalescing = null)
         {
-
-            if (!_definitions.TryGetValue(identifier, out var def))
+            var identifierToUse = identifier ?? $"{path}{method.Method}{baseAddress}";
+            if (!_definitions.TryGetValue(identifierToUse, out var def))
             {
-                def = new RequestDefinition(path, method)
+                def = new RequestDefinition(baseAddress, path, method)
                 {
                     Authenticated = authenticated,
                     LimitGuard = limitGuard,
@@ -110,9 +86,10 @@ namespace CryptoExchange.Net.Objects
                     ParameterPosition = parameterPosition,
                     PreventCaching = preventCaching ?? false,
                     TryParseOnNonSuccess = tryParseOnNonSuccess ?? false,
-                    ForcePathEndWithSlash = forcePathEndWithSlash ?? false
+                    ForcePathEndWithSlash = forcePathEndWithSlash ?? false,
+                    PreventRequestCoalescing = preventRequestCoalescing ?? false,
                 };
-                _definitions.TryAdd(identifier, def);
+                _definitions.TryAdd(identifierToUse, def);
             }
 
             return def;

CryptoExchange.Net/Objects/RestRequestConfiguration.cs

@@ -1,4 +1,5 @@
-using System.Collections.Generic;
+using CryptoExchange.Net.Interfaces;
+using System.Collections.Generic;
 using System.Net.Http;
 
 namespace CryptoExchange.Net.Objects
@@ -12,29 +13,17 @@ namespace CryptoExchange.Net.Objects
         private string? _queryString;
 
         /// <summary>
-        /// Http method
+        /// The request definition for the request
         /// </summary>
-        public HttpMethod Method { get; set; }
-        /// <summary>
-        /// Whether the request needs authentication
-        /// </summary>
-        public bool Authenticated { get; set; }
-        /// <summary>
-        /// Base address for the request
-        /// </summary>
-        public string BaseAddress { get; set; }
-        /// <summary>
-        /// The request path
-        /// </summary>
-        public string Path { get; set; }
+        public RequestDefinition RequestDefinition { get; set; }
         /// <summary>
         /// Query parameters
         /// </summary>
-        public IDictionary<string, object>? QueryParameters { get; set; }
+        public Parameters? QueryParameters { get; set; }
         /// <summary>
         /// Body parameters
         /// </summary>
-        public IDictionary<string, object>? BodyParameters { get; set; }
+        public Parameters? BodyParameters { get; set; }
         /// <summary>
         /// Request headers
         /// </summary>
@@ -57,22 +46,16 @@ namespace CryptoExchange.Net.Objects
         /// </summary>
         public RestRequestConfiguration(
             RequestDefinition requestDefinition,
-            string baseAddress,
-            IDictionary<string, object>? queryParams,
-            IDictionary<string, object>? bodyParams,
+            Parameters? queryParams,
+            Parameters? bodyParams,
             IDictionary<string, string>? headers,
-            ArrayParametersSerialization arraySerialization,
             HttpMethodParameterPosition parametersPosition,
             RequestBodyFormat bodyFormat)
         {
-            Method = requestDefinition.Method;
-            Authenticated = requestDefinition.Authenticated;
-            Path = requestDefinition.Path;
-            BaseAddress = baseAddress;
+            RequestDefinition = requestDefinition;
             QueryParameters = queryParams;
             BodyParameters = bodyParams;
             Headers = headers;
-            ArraySerialization = arraySerialization;
             ParameterPosition = parametersPosition;
             BodyFormat = bodyFormat;
         }
@@ -80,15 +63,15 @@ namespace CryptoExchange.Net.Objects
         /// <summary>
         /// Get the parameter collection based on the ParameterPosition
         /// </summary>
-        public IDictionary<string, object> GetPositionParameters()
+        public Parameters GetPositionParameters()
         {
             if (ParameterPosition == HttpMethodParameterPosition.InBody)
             {
-                BodyParameters ??= new Dictionary<string, object>();
+                BodyParameters ??= new Parameters(ParameterSerializationSettings.Default);
                 return BodyParameters;
             }
 
-            QueryParameters ??= new Dictionary<string, object>();
+            QueryParameters ??= new Parameters(ParameterSerializationSettings.Default);
             return QueryParameters;
         }
 

CryptoExchange.Net/Objects/Results/CallResult.cs

@@ -0,0 +1,121 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+using System.Text;
+
+namespace CryptoExchange.Net.Objects;
+
+/// <summary>
+/// Call result
+/// </summary>
+[DebuggerDisplay("{DebugView,nq}")]
+public record CallResult : ICallResult
+{
+    private string DebugView => Success ? "Success" : $"Error: {Error}";
+
+    private static CallResult _successResult = new CallResult();
+
+    /// <inheritdoc />
+    public Error? Error { get; init; }
+    /// <inheritdoc />
+    [MemberNotNullWhen(false, nameof(Error))]
+    public bool Success => Error == null;
+
+    /// <summary>
+    /// Create an error response
+    /// </summary>
+    /// <param name="error">The error</param>
+    public static CallResult Fail(Error error) => new CallResult { Error = error };
+    /// <summary>
+    /// Create a success result
+    /// </summary>
+    public static CallResult Ok() => _successResult;
+    /// <summary>
+    /// Create a success result
+    /// </summary>
+    /// <typeparam name="T">Result type</typeparam>
+    /// <param name="originalData">The original string data</param>
+    /// <param name="data">Data type</param>
+    public static CallResult<T> Ok<T>(T data, string? originalData = null) => new CallResult<T> { Data = data, OriginalData = originalData };
+    /// <summary>
+    /// Create an error response
+    /// </summary>
+    /// <typeparam name="T">Result type</typeparam>
+    /// <param name="originalData">The original string data</param>
+    /// <param name="error">The error</param>
+    public static CallResult<T> Fail<T>(Error error, string? originalData = null) => new CallResult<T> { Error = error, OriginalData = originalData };
+
+    /// <inheritdoc />
+    public override string ToString()
+    {
+        return Success ? $"Success" : $"Error: {Error}";
+    }
+}
+
+
+/// <inheritdoc />
+public record CallResult<T> : CallResult, ICallResult<T>
+{
+    /// <inheritdoc />
+    public new Error? Error
+    {
+        get => base.Error;
+        init => base.Error = value;
+    }
+    /// <inheritdoc />
+    [MemberNotNullWhen(false, nameof(Error))]
+    [MemberNotNullWhen(true, nameof(Data))]
+    public new bool Success => Error == null;
+
+    /// <summary>
+    /// The data returned by the call, only available when Success = true
+    /// </summary>
+    public T? Data { get; init; }
+
+    /// <summary>
+    /// The original data returned by the call, only available when `OutputOriginalData` is set to `true` in the client options
+    /// </summary>
+    public string? OriginalData { get; init; }
+
+    /// <summary>
+    /// Create an error response
+    /// </summary>
+    /// <param name="error">The error</param>
+    /// <param name="originalData">The original string data</param>
+    public static CallResult<T> Fail(Error error, string? originalData = null) => new CallResult<T> { Error = error, OriginalData = originalData };
+    /// <summary>
+    /// Create a success result
+    /// </summary>
+    /// <param name="data">The data</param>
+    /// <param name="originalData">The original string data</param>
+    /// <returns></returns>
+    public static CallResult<T> Ok(T data, string? originalData = null) => new CallResult<T> { Data = data, OriginalData = originalData };
+}
+
+/// <summary>
+/// Call result for an exchange
+/// </summary>
+/// <typeparam name="T">Data type</typeparam>
+public record ExchangeCallResult<T> : CallResult<T>, IExchangeCallResult<T>
+{
+    /// <summary>
+    /// Exchange name
+    /// </summary>
+    public string Exchange { get; set; } = string.Empty;
+    /// <summary>
+    /// Create an error response
+    /// </summary>
+    /// <param name="exchange">The exchange name</param>
+    /// <param name="error">The error</param>
+    /// <param name="originalData">The original string data</param>
+    public static ExchangeCallResult<T> Fail(string exchange, Error error, string? originalData = null) => new ExchangeCallResult<T> { Exchange = exchange, Error = error };
+    /// <summary>
+    /// Create a success result
+    /// </summary>
+    /// <param name="exchange">The exchange name</param>
+    /// <param name="data">The data</param>
+    /// <param name="originalData">The original string data</param>
+    /// <returns></returns>
+    public static ExchangeCallResult<T> Ok(string exchange, T data, string? originalData = null) => new ExchangeCallResult<T> { Exchange = exchange, Data = data };
+}

CryptoExchange.Net/Objects/Results/HttpResult.cs

@@ -0,0 +1,314 @@
+using CryptoExchange.Net.SharedApis;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+using System.Net;
+using System.Net.Http;
+using System.Net.Http.Headers;
+using System.Text;
+
+namespace CryptoExchange.Net.Objects;
+
+/// <summary>
+/// HTTP call result
+/// </summary>
+[DebuggerDisplay("{DebugView,nq}")]
+public record HttpResult : IHttpResult
+{
+    private string DebugView => $"[Req {RequestId}] " + (Success ? "Success" : $"Error: {Error}");
+
+    /// <summary>
+    /// Create a new success HTTP result
+    /// </summary>
+    public static HttpResult<T> Ok<T>(
+        string exchange,
+        HttpStatusCode code,
+        Version version,
+        HttpResponseHeaders responseHeaders,
+        TimeSpan elapsed,
+        long? contentLength,
+        string? originalData,
+        int requestId,
+        string uri,
+        string? content,
+        HttpMethod method,
+        HttpRequestHeaders requestHeaders,
+        ResultDataSource source,
+        T data) =>
+        new HttpResult<T>(exchange, data, null)
+        {
+            ResponseStatusCode = code,
+            HttpVersion = version,
+            ResponseHeaders = responseHeaders,
+            ResponseTime = elapsed,
+            ResponseLength = contentLength,
+            OriginalData = originalData,
+            RequestId = requestId,
+            RequestUrl = uri,
+            RequestBody = content,
+            RequestMethod = method,
+            RequestHeaders = requestHeaders,
+            DataSource = source,
+        };
+
+    /// <summary>
+    /// Create a new success HTTP result
+    /// </summary>
+    public static HttpResult<T> Ok<T>(IHttpResult result, T data, PageRequest? pageRequest = null) =>
+        new HttpResult<T>(result.Exchange, data, null)
+        {
+            ResponseStatusCode = result.ResponseStatusCode,
+            HttpVersion = result.HttpVersion,
+            ResponseHeaders = result.ResponseHeaders,
+            ResponseTime = result.ResponseTime,
+            ResponseLength = result.ResponseLength,
+            OriginalData = result.OriginalData,
+            RequestId = result.RequestId,
+            RequestUrl = result.RequestUrl,
+            RequestBody = result.RequestBody,
+            RequestMethod = result.RequestMethod,
+            RequestHeaders = result.RequestHeaders,
+            DataSource = result.DataSource,
+            Error = result.Error,
+            Data = data,
+            NextPageRequest = pageRequest
+        };
+
+    /// <summary>
+    /// Create a new error HTTP result
+    /// </summary>
+    public static HttpResult<T> Fail<T>(string exchange, Error error) => new HttpResult<T>(exchange, default, error);
+
+    /// <summary>
+    /// Create a new error HTTP result
+    /// </summary>
+    public static HttpResult<T> Fail<T>(IHttpResult result, Error? error = null, T? data = default)
+        => new HttpResult<T>(result.Exchange, data, error ?? result.Error)
+        {
+            ResponseStatusCode = result.ResponseStatusCode,
+            HttpVersion = result.HttpVersion,
+            ResponseHeaders = result.ResponseHeaders,
+            ResponseTime = result.ResponseTime,
+            ResponseLength = result.ResponseLength,
+            OriginalData = result.OriginalData,
+            RequestId = result.RequestId,
+            RequestUrl = result.RequestUrl,
+            RequestBody = result.RequestBody,
+            RequestMethod = result.RequestMethod,
+            RequestHeaders = result.RequestHeaders,
+            DataSource = result.DataSource,
+        };
+
+    /// <summary>
+    /// Create a new error HTTP result
+    /// </summary>
+    public static HttpResult<T> Fail<T>(
+        string exchange,
+        HttpStatusCode? code,
+        Version? version,
+        HttpResponseHeaders? responseHeaders,
+        TimeSpan elapsed,
+        long? contentLength,
+        string? originalData,
+        int requestId,
+        string uri,
+        string? content,
+        HttpMethod method,
+        HttpRequestHeaders requestHeaders,
+        ResultDataSource source,
+        Error error,
+        T? result = default) =>
+        new HttpResult<T>(exchange, result, error)
+        {
+            ResponseStatusCode = code,
+            HttpVersion = version,
+            ResponseHeaders = responseHeaders,
+            ResponseTime = elapsed,
+            ResponseLength = contentLength,
+            OriginalData = originalData,
+            RequestId = requestId,
+            RequestUrl = uri,
+            RequestBody = content,
+            RequestMethod = method,
+            RequestHeaders = requestHeaders,
+            DataSource = source,
+        };
+
+    /// <summary>
+    /// Create a new error HTTP result
+    /// </summary>
+    public static HttpResult Fail(string exchange, Error error) => new HttpResult() { Exchange = exchange, Error = error };
+
+    /// <summary>
+    /// Create a new error HTTP result
+    /// </summary>
+    public static HttpResult Fail(IHttpResult result, Error? error = null)
+        => new HttpResult()
+        {
+            ResponseStatusCode = result.ResponseStatusCode,
+            HttpVersion = result.HttpVersion,
+            ResponseHeaders = result.ResponseHeaders,
+            ResponseTime = result.ResponseTime,
+            ResponseLength = result.ResponseLength,
+            OriginalData = result.OriginalData,
+            RequestId = result.RequestId,
+            RequestUrl = result.RequestUrl,
+            RequestBody = result.RequestBody,
+            RequestMethod = result.RequestMethod,
+            RequestHeaders = result.RequestHeaders,
+            DataSource = result.DataSource,
+            Exchange = result.Exchange,
+            Error = error ?? result.Error
+        };
+
+    /// <summary>
+    /// Create a new success HTTP result
+    /// </summary>
+    public static HttpResult Ok(IHttpResult result)
+        => new HttpResult()
+        {
+            ResponseStatusCode = result.ResponseStatusCode,
+            HttpVersion = result.HttpVersion,
+            ResponseHeaders = result.ResponseHeaders,
+            ResponseTime = result.ResponseTime,
+            ResponseLength = result.ResponseLength,
+            OriginalData = result.OriginalData,
+            RequestId = result.RequestId,
+            RequestUrl = result.RequestUrl,
+            RequestBody = result.RequestBody,
+            RequestMethod = result.RequestMethod,
+            RequestHeaders = result.RequestHeaders,
+            DataSource = result.DataSource,
+            Exchange = result.Exchange,
+        };
+
+
+    /// <summary>
+    /// Exchange name
+    /// </summary>
+    public string Exchange { get; init; } = string.Empty;
+
+    /// <inheritdoc />
+    public Error? Error { get; internal set; }
+    /// <inheritdoc />
+    [MemberNotNullWhen(false, nameof(Error))]
+    public bool Success => Error == null;
+    /// <summary>
+    /// The original data returned by the call, only available when `OutputOriginalData` is set to `true` in the client options
+    /// </summary>
+    public string? OriginalData { get; init; }
+    /// <summary>
+    /// The request http method
+    /// </summary>
+    public HttpMethod? RequestMethod { get; init; }
+
+    /// <summary>
+    /// HTTP protocol version
+    /// </summary>
+    public Version? HttpVersion { get; init; }
+
+    /// <summary>
+    /// The headers sent with the request
+    /// </summary>
+    public HttpRequestHeaders? RequestHeaders { get; init; }
+
+    /// <summary>
+    /// The request id
+    /// </summary>
+    public int? RequestId { get; init; }
+
+    /// <summary>
+    /// The url which was requested
+    /// </summary>
+    public string? RequestUrl { get; init; }
+
+    /// <summary>
+    /// The body of the request
+    /// </summary>
+    public string? RequestBody { get; init; }
+
+    /// <summary>
+    /// Length in bytes of the response
+    /// </summary>
+    public long? ResponseLength { get; init; }
+
+    /// <summary>
+    /// The status code of the response. Note that a OK status does not always indicate success, check the Success parameter for this.
+    /// </summary>
+    public HttpStatusCode? ResponseStatusCode { get; init; }
+
+    /// <summary>
+    /// The response headers
+    /// </summary>
+    public HttpResponseHeaders? ResponseHeaders { get; init; }
+
+    /// <summary>
+    /// The time between sending the request and receiving the response
+    /// </summary>
+    public TimeSpan? ResponseTime { get; init; }
+    /// <summary>
+    /// The data source of this result
+    /// </summary>
+    public ResultDataSource DataSource { get; init; } = ResultDataSource.Server;
+}
+
+
+/// <inheritdoc />
+[DebuggerDisplay("{DebugView,nq}")]
+public record HttpResult<T> : HttpResult, IHttpResult<T>
+{
+    private string DebugView
+    {
+        get
+        {
+            var result = new StringBuilder($"[Req {RequestId}] " + (Success ? "Success" : $"Error: {Error}"));
+            if (Data != null)
+            {
+                result.Append(", ");
+                var typeName = typeof(T).Name;
+                if (Data is Array ar)
+                {
+                    result.Append($"{ar.Length} {typeName.Substring(0, typeName.Length - 2)}");
+                }
+                else
+                {
+                    result.Append(typeName);
+                }
+            }
+
+            return result.ToString();
+        }
+    } 
+
+    /// <summary>
+    /// ctor
+    /// </summary>
+    public HttpResult(string exchange, T? value, Error? error)
+    {
+        Exchange = exchange;
+        Data = value;
+        Error = error;
+    }
+
+    /// <inheritdoc />
+    public new Error? Error
+    {
+        get => base.Error;
+        internal set => base.Error = value;
+    }
+    /// <inheritdoc />
+    [MemberNotNullWhen(false, nameof(Error))]
+    [MemberNotNullWhen(true, nameof(Data))]
+    public new bool Success => Error == null;
+    
+    /// <summary>
+    /// The data returned by the call, only available when Success = true
+    /// </summary>
+    public T? Data { get; init; }
+    
+    /// <summary>
+    /// Next page request, only potentially available when using Shared API's
+    /// </summary>
+    public PageRequest? NextPageRequest { get; init; }
+}

CryptoExchange.Net/Objects/Results/ICallResult.cs

@@ -0,0 +1,62 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
+using System.Text;
+
+namespace CryptoExchange.Net.Objects;
+
+/// <summary>
+/// Call result
+/// </summary>
+public interface ICallResult
+{
+    /// <summary>
+    /// An error if the call didn't succeed, will always be filled if Success = false
+    /// </summary>
+    Error? Error { get; }
+
+    /// <summary>
+    /// Whether the call was successful
+    /// </summary>
+    [MemberNotNullWhen(false, nameof(Error))]
+    bool Success { get; }
+}
+
+/// <summary>
+/// Call result
+/// </summary>
+/// <typeparam name="T">Result data type</typeparam>
+public interface ICallResult<T> : ICallResult
+{
+    /// <inheritdoc />
+    new Error? Error { get; }
+
+    /// <inheritdoc />
+    [MemberNotNullWhen(false, nameof(Error))]
+    [MemberNotNullWhen(true, nameof(Data))]
+    new bool Success { get; }
+
+    /// <summary>
+    /// The result data, only available when Success = true
+    /// </summary>
+    T? Data { get; }
+}
+
+/// <summary>
+/// Exchange call result
+/// </summary>
+public interface IExchangeCallResult : ICallResult
+{
+    /// <summary>
+    /// Exchange name
+    /// </summary>
+    public string Exchange { get; }
+}
+
+/// <summary>
+/// Exchange call result
+/// </summary>
+/// <typeparam name="T">Result data type</typeparam>
+public interface IExchangeCallResult<T> : IExchangeCallResult, ICallResult<T>
+{
+}

CryptoExchange.Net/Objects/Results/IHttpResult.cs

@@ -0,0 +1,81 @@
+using System;
+using System.Collections.Generic;
+using System.Net;
+using System.Net.Http;
+using System.Net.Http.Headers;
+using System.Text;
+
+namespace CryptoExchange.Net.Objects
+{
+    /// <summary>
+    /// HTTP call result
+    /// </summary>
+    public interface IHttpResult : ICallResult, IExchangeCallResult
+    {
+        /// <summary>
+        /// The original data returned by the call, only available when `OutputOriginalData` is set to `true` in the client options
+        /// </summary>
+        string? OriginalData { get; init; }
+        /// <summary>
+        /// The request http method
+        /// </summary>
+        HttpMethod? RequestMethod { get; init; }
+
+        /// <summary>
+        /// HTTP protocol version
+        /// </summary>
+        Version? HttpVersion { get; init; }
+
+        /// <summary>
+        /// The headers sent with the request
+        /// </summary>
+        HttpRequestHeaders? RequestHeaders { get; init; }
+
+        /// <summary>
+        /// The request id
+        /// </summary>
+        int? RequestId { get; init; }
+
+        /// <summary>
+        /// The url which was requested
+        /// </summary>
+        string? RequestUrl { get; init; }
+
+        /// <summary>
+        /// The body of the request
+        /// </summary>
+        string? RequestBody { get; init; }
+
+        /// <summary>
+        /// Length in bytes of the response
+        /// </summary>
+        long? ResponseLength { get; init; }
+
+        /// <summary>
+        /// The status code of the response. Note that a OK status does not always indicate success, check the Success parameter for this.
+        /// </summary>
+        HttpStatusCode? ResponseStatusCode { get; init; }
+
+        /// <summary>
+        /// The response headers
+        /// </summary>
+        HttpResponseHeaders? ResponseHeaders { get; init; }
+
+        /// <summary>
+        /// The time between sending the request and receiving the response
+        /// </summary>
+        TimeSpan? ResponseTime { get; init; }
+        /// <summary>
+        /// The data source of this result
+        /// </summary>
+        ResultDataSource DataSource { get; init; }
+    }
+
+    /// <summary>
+    /// HTTP call result
+    /// </summary>
+    /// <typeparam name="T">Result data type</typeparam>
+    public interface IHttpResult<T> : IHttpResult, IExchangeCallResult<T>
+    {
+    }
+}

CryptoExchange.Net/Objects/Results/IWebSocketResult.cs

@@ -0,0 +1,67 @@
+using System;
+using System.Collections.Generic;
+using System.Net;
+using System.Net.Http;
+using System.Net.Http.Headers;
+using System.Text;
+
+namespace CryptoExchange.Net.Objects
+{
+    /// <summary>
+    /// WebSocket call result
+    /// </summary>
+    public interface IWebSocketResult : ICallResult, IExchangeCallResult
+    {
+        /// <summary>
+        /// The request id
+        /// </summary>
+        public int? RequestId { get; init; }
+
+        /// <summary>
+        /// The url which was requested
+        /// </summary>
+        public int? ConnectionId { get; init; }
+
+        /// <summary>
+        /// The websocket url
+        /// </summary>
+        public string? Url { get; init; }
+
+        /// <summary>
+        /// The time between sending the request and receiving the response
+        /// </summary>
+        public TimeSpan? ResponseTime { get; init; }
+    }
+
+    /// <summary>
+    /// WebSocket call result
+    /// </summary>
+    /// <typeparam name="T">Data result type</typeparam>
+    public interface IWebSocketResult<T> : IWebSocketResult, IExchangeCallResult<T>
+    {
+
+    }
+
+    /// <summary>
+    /// Query result
+    /// </summary>
+    public interface IQueryResult : IWebSocketResult
+    {
+        /// <summary>
+        /// The original returned data, only available when OutputOriginalData is set to true in the client options
+        /// </summary>
+        public string? OriginalData { get; init; }
+        /// <summary>
+        /// The query request body
+        /// </summary>
+        public string? RequestBody { get; init; }
+    }
+
+    /// <summary>
+    /// Query result
+    /// </summary>
+    /// <typeparam name="T"></typeparam>
+    public interface IQueryResult<T> : IQueryResult, IWebSocketResult<T>
+    {
+    }
+}

CryptoExchange.Net/Objects/Results/Unit.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace CryptoExchange.Net.Objects;
+
+/// <summary>
+/// Void result
+/// </summary>
+public readonly struct Unit
+{
+    /// <summary>
+    /// Void value
+    /// </summary>
+    public static readonly Unit Value = default;
+    /// <summary>
+    /// Type
+    /// </summary>
+    public static Type Type { get; } = typeof(Unit);
+}

CryptoExchange.Net/Objects/Results/WebSocketResult.cs

@@ -0,0 +1,326 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+using System.Text;
+
+namespace CryptoExchange.Net.Objects;
+
+/// <summary>
+/// WebSocket call result
+/// </summary>
+[DebuggerDisplay("{DebugView,nq}")]
+public record WebSocketResult : IWebSocketResult
+{
+    private string DebugView => $"[Sckt {ConnectionId}] " + (RequestId == null ? "" : $"[Req {RequestId}] ") + (Success ? "Success" : $"Error: {Error}");
+
+    /// <summary>
+    /// ctor
+    /// </summary>
+    public WebSocketResult(string exchange, Error? error)
+    {
+        Exchange = exchange;
+        Error = error;
+    }
+
+    /// <summary>
+    /// Create a new success WebSocket result
+    /// </summary>
+    public static WebSocketResult<T> Ok<T>(IWebSocketResult result, T data) =>
+        new WebSocketResult<T>(result.Exchange, data, null)
+        {
+            ConnectionId = result.ConnectionId,
+            Url = result.Url,
+            RequestId = result.RequestId,
+            ResponseTime = result.ResponseTime,
+            Error = result.Error,
+            Data = data
+        };
+
+    /// <summary>
+    /// Create a new success WebSocket result
+    /// </summary>
+    public static WebSocketResult<T> Ok<T>(
+        string exchange,
+        int connectionId,
+        TimeSpan elapsed,
+        int requestId,
+        string? url,
+        T data) =>
+        new WebSocketResult<T>(exchange, data, null)
+        {
+            ResponseTime = elapsed,
+            RequestId = requestId,
+            ConnectionId = connectionId,
+            Url = url
+        };
+
+    /// <summary>
+    /// Create a new success WebSocket result
+    /// </summary>
+    public static WebSocketResult Ok(
+        string exchange,
+        int connectionId,
+        TimeSpan elapsed,
+        int requestId,
+        string? url) =>
+        new WebSocketResult(exchange, null)
+        {
+            ResponseTime = elapsed,
+            RequestId = requestId,
+            ConnectionId = connectionId,
+            Url = url
+        };
+
+    /// <summary>
+    /// Create a new error WebSocket result
+    /// </summary>
+    public static WebSocketResult Fail(string exchange, Error error) => new WebSocketResult(exchange, error);
+    /// <summary>
+    /// Create a new error WebSocket result
+    /// </summary>
+    public static WebSocketResult Fail(
+        string exchange,
+        int connectionId,
+        TimeSpan elapsed,
+        int requestId,
+        string? url,
+        Error error) =>
+        new WebSocketResult(exchange, error)
+        {
+            ResponseTime = elapsed,
+            RequestId = requestId,
+            ConnectionId = connectionId,
+            Url = url
+        };
+    /// <summary>
+    /// Create a new error WebSocket result
+    /// </summary>
+    public static WebSocketResult<T> Fail<T>(IWebSocketResult result, Error? error = null, T? data = default)
+        => new WebSocketResult<T>(result.Exchange, data, error ?? result.Error)
+        {
+            ConnectionId = result.ConnectionId,
+            Url = result.Url,
+            RequestId = result.RequestId,
+            ResponseTime = result.ResponseTime,
+        };
+    /// <summary>
+    /// Create a new error WebSocket result
+    /// </summary>
+    public static WebSocketResult<T> Fail<T>(string exchange, Error error) => new WebSocketResult<T>(exchange, default, error);
+
+    /// <summary>
+    /// Create a new error WebSocket result
+    /// </summary>
+    public static WebSocketResult<T> Fail<T>(
+        string exchange,
+        int connectionId,
+        TimeSpan elapsed,
+        int requestId,
+        string? url,
+        Error error) =>
+        new WebSocketResult<T>(exchange, default, error)
+        {
+            ResponseTime = elapsed,
+            RequestId = requestId,
+            ConnectionId = connectionId,
+            Url = url
+        };
+
+
+    /// <summary>
+    /// Exchange name
+    /// </summary>
+    public string Exchange { get; init; }
+    /// <inheritdoc />
+    public Error? Error { get; init; }
+    /// <inheritdoc />
+    [MemberNotNullWhen(false, nameof(Error))]
+    public bool Success => Error == null;
+
+    /// <summary>
+    /// The request id
+    /// </summary>
+    public int? RequestId { get; init; }
+
+    /// <summary>
+    /// The url which was requested
+    /// </summary>
+    public int? ConnectionId { get; init; }
+
+    /// <summary>
+    /// The websocket url
+    /// </summary>
+    public string? Url { get; init; }
+
+    /// <summary>
+    /// The time between sending the request and receiving the response
+    /// </summary>
+    public TimeSpan? ResponseTime { get; init; }
+}
+
+/// <inheritdoc />
+public record WebSocketResult<T> : WebSocketResult, IWebSocketResult<T>
+{
+    /// <summary>
+    /// ctor
+    /// </summary>
+    public WebSocketResult(string exchange, T? value, Error? error): base(exchange, error)
+    {
+        Data = value;
+    }
+
+    /// <inheritdoc />
+    public new Error? Error
+    {
+        get => base.Error;
+        init => base.Error = value;
+    }
+    /// <inheritdoc />
+    [MemberNotNullWhen(false, nameof(Error))]
+    [MemberNotNullWhen(true, nameof(Data))]
+    public new bool Success => Error == null;
+    /// <summary>
+    /// The data returned by the call, only available when Success = true
+    /// </summary>
+    public T? Data { get; init; }    
+}
+
+/// <inheritdoc />
+public record QueryResult : WebSocketResult, IQueryResult
+{
+    /// <summary>
+    /// ctor
+    /// </summary>
+    public QueryResult(string exchange, Error? error) : base(exchange, error)
+    {
+    }
+
+    /// <summary>
+    /// Create a new error Query result
+    /// </summary>
+    public new static QueryResult Fail(string exchange, Error error) => new QueryResult(exchange, error);
+
+
+    /// <summary>
+    /// Create a new error WebSocket result
+    /// </summary>
+    public static QueryResult Fail(IQueryResult result, Error? error = null)
+        => new QueryResult(result.Exchange, error ?? result.Error)
+        {
+            ConnectionId = result.ConnectionId,
+            Url = result.Url,
+            RequestId = result.RequestId,
+            ResponseTime = result.ResponseTime,
+            OriginalData = result.OriginalData,
+            RequestBody = result.RequestBody
+        };
+
+    /// <summary>
+    /// Create a new success query result
+    /// </summary>
+    public static QueryResult<T> Ok<T>(
+        string exchange,
+        int connectionId,
+        TimeSpan elapsed,
+        int requestId,
+        string? requestBody,
+        string? url,
+        string? originalData,
+        T data) =>
+        new QueryResult<T>(exchange, data, null)
+        {
+            ResponseTime = elapsed,
+            RequestId = requestId,
+            RequestBody = requestBody,
+            ConnectionId = connectionId,
+            Url = url,
+            OriginalData = originalData,
+        };
+    /// <summary>
+    /// Create a new success WebSocket result
+    /// </summary>
+    public static QueryResult<T> Ok<T>(IQueryResult result, T data) =>
+        new QueryResult<T>(result.Exchange, data, null)
+        {
+            ConnectionId = result.ConnectionId,
+            Url = result.Url,
+            RequestId = result.RequestId,
+            RequestBody = result.RequestBody,
+            ResponseTime = result.ResponseTime,
+            Error = result.Error,
+            OriginalData = result.OriginalData,
+            Data = data
+        };
+
+    /// <summary>
+    /// Create a new error WebSocket result
+    /// </summary>
+    public static QueryResult<T> Fail<T>(
+        string exchange,
+        int connectionId,
+        TimeSpan elapsed,
+        int requestId,
+        string? requestBody,
+        string? url,
+        string? originalData,
+        Error error) =>
+        new QueryResult<T>(exchange, default, error)
+        {
+            ResponseTime = elapsed,
+            RequestId = requestId,
+            RequestBody = requestBody,
+            ConnectionId = connectionId,
+            OriginalData = originalData,
+            Url = url
+        };
+    /// <summary>
+    /// Create a new error WebSocket result
+    /// </summary>
+    public static QueryResult<T> Fail<T>(IQueryResult result, Error? error = null, T? data = default)
+        => new QueryResult<T>(result.Exchange, data, error ?? result.Error)
+        {
+            ConnectionId = result.ConnectionId,
+            Url = result.Url,
+            RequestId = result.RequestId,
+            RequestBody = result.RequestBody,
+            OriginalData = result.OriginalData,
+            ResponseTime = result.ResponseTime,
+        };
+    /// <summary>
+    /// Create a new error WebSocket result
+    /// </summary>
+    public new static QueryResult<T> Fail<T>(string exchange, Error error) => new QueryResult<T>(exchange, default, error);
+
+    /// <inheritdoc />
+    public string? RequestBody { get; init; }
+
+    /// <inheritdoc />
+    public string? OriginalData { get; init; }
+}
+
+/// <inheritdoc />
+public record QueryResult<T> : QueryResult, IQueryResult<T>
+{
+    /// <summary>
+    /// ctor
+    /// </summary>
+    public QueryResult(string exchange, T? value, Error? error) : base(exchange, error)
+    {
+        Data = value;
+    }
+
+    
+    /// <inheritdoc />
+    public new Error? Error
+    {
+        get => base.Error;
+        init => base.Error = value;
+    }
+    /// <inheritdoc />
+    [MemberNotNullWhen(false, nameof(Error))]
+    [MemberNotNullWhen(true, nameof(Data))]
+    public new bool Success => Error == null;
+    /// <inheritdoc />
+    public T? Data { get; set; }
+}

CryptoExchange.Net/Objects/Sockets/DataEvent.cs

@@ -165,7 +165,10 @@ namespace CryptoExchange.Net.Objects.Sockets
             {
                 StreamId = StreamId,
                 UpdateType = UpdateType,
-                Symbol = Symbol                
+                Symbol = Symbol,
+                DataTime = DataTime,
+                DataTimeLocal = DataTimeLocal,
+                SequenceNumber = SequenceNumber
             };
         }
 

CryptoExchange.Net/Objects/Sockets/ManualUpdateSubscription.cs

@@ -0,0 +1,209 @@
+using CryptoExchange.Net.Sockets;
+using CryptoExchange.Net.Sockets.Default;
+using CryptoExchange.Net.Sockets.Default.Routing;
+using Microsoft.Extensions.Logging.Abstractions;
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace CryptoExchange.Net.Objects.Sockets
+{
+    /// <summary>
+    /// Controller for an update subscription which isn't backed by a websocket connection. Can be used for testing.
+    /// </summary>
+    public class ManualUpdateSubscription
+    {
+        private readonly Func<Task> _closeAsync;
+        private readonly Func<Task> _reconnectAsync;
+        private readonly Func<Task<CallResult>> _resubscribeAsync;
+        private readonly ManualSubscription _manualSubscription;
+        private int _closedEventInvoked;
+
+        /// <summary>
+        /// The update subscription
+        /// </summary>
+        public UpdateSubscription Subscription { get; }
+
+        /// <summary>
+        /// The virtual socket id
+        /// </summary>
+        public int SocketId { get; }
+
+        /// <summary>
+        /// The last timestamp anything was received by the subscription
+        /// </summary>
+        public DateTime? LastReceiveTime { get; private set; }
+
+        /// <summary>
+        /// The current virtual websocket status
+        /// </summary>
+        public SocketStatus SocketStatus { get; private set; }
+
+        /// <summary>
+        /// Create a manually controlled update subscription
+        /// </summary>
+        /// <param name="socketId">The virtual socket id</param>
+        /// <param name="closeAsync">Callback when the subscription is closed</param>
+        /// <param name="reconnectAsync">Callback when a reconnect is requested</param>
+        /// <param name="resubscribeAsync">Callback when a resubscribe is requested</param>
+        public ManualUpdateSubscription(
+            int socketId = 0,
+            Func<Task>? closeAsync = null,
+            Func<Task>? reconnectAsync = null,
+            Func<Task<CallResult>>? resubscribeAsync = null)
+        {
+            SocketId = socketId;
+            SocketStatus = SocketStatus.Connected;
+            _closeAsync = closeAsync ?? (() => Task.CompletedTask);
+            _reconnectAsync = reconnectAsync ?? (() => Task.CompletedTask);
+            _resubscribeAsync = resubscribeAsync ?? (() => Task.FromResult(CallResult.Ok()));
+
+            _manualSubscription = new ManualSubscription();
+            _manualSubscription.Status = SubscriptionStatus.Subscribed;
+            Subscription = new UpdateSubscription(this, _manualSubscription);
+        }
+
+        /// <summary>
+        /// Set the last timestamp anything was received by the subscription
+        /// </summary>
+        /// <param name="timestamp">The receive timestamp</param>
+        public void SetLastReceiveTime(DateTime? timestamp)
+        {
+            LastReceiveTime = timestamp;
+        }
+
+        /// <summary>
+        /// Set the virtual websocket status
+        /// </summary>
+        /// <param name="status">The status</param>
+        public void SetSocketStatus(SocketStatus status)
+        {
+            SocketStatus = status;
+        }
+
+        /// <summary>
+        /// Set the subscription status
+        /// </summary>
+        /// <param name="status">The status</param>
+        public void SetSubscriptionStatus(SubscriptionStatus status)
+        {
+            _manualSubscription.Status = status;
+        }
+
+        /// <summary>
+        /// Invoke the connection lost event
+        /// </summary>
+        public void InvokeConnectionLost()
+        {
+            Subscription.HandleConnectionLostEvent();
+        }
+
+        /// <summary>
+        /// Invoke the connection restored event
+        /// </summary>
+        /// <param name="disconnectedPeriod">The period the connection was disconnected</param>
+        public void InvokeConnectionRestored(TimeSpan disconnectedPeriod)
+        {
+            Subscription.HandleConnectionRestoredEvent(disconnectedPeriod);
+        }
+
+        /// <summary>
+        /// Invoke the connection closed event
+        /// </summary>
+        public void InvokeConnectionClosed()
+        {
+            if (Interlocked.Exchange(ref _closedEventInvoked, 1) != 0)
+                return;
+
+            SocketStatus = SocketStatus.Closed;
+            _manualSubscription.Status = SubscriptionStatus.Closed;
+            Subscription.HandleConnectionClosedEvent();
+        }
+
+        /// <summary>
+        /// Invoke the resubscribing failed event
+        /// </summary>
+        /// <param name="error">The resubscribe error</param>
+        public void InvokeResubscribingFailed(Error error)
+        {
+            if (error == null)
+                throw new ArgumentNullException(nameof(error));
+
+            Subscription.HandleResubscribeFailedEvent(error);
+        }
+
+        /// <summary>
+        /// Invoke the activity paused event
+        /// </summary>
+        public void InvokeActivityPaused()
+        {
+            Subscription.HandlePausedEvent();
+        }
+
+        /// <summary>
+        /// Invoke the activity unpaused event
+        /// </summary>
+        public void InvokeActivityUnpaused()
+        {
+            Subscription.HandleUnpausedEvent();
+        }
+
+        /// <summary>
+        /// Invoke the exception event
+        /// </summary>
+        /// <param name="exception">The exception</param>
+        public void InvokeException(Exception exception)
+        {
+            if (exception == null)
+                throw new ArgumentNullException(nameof(exception));
+
+            _manualSubscription.InvokeExceptionHandler(exception);
+        }
+
+        internal async Task CloseAsync()
+        {
+            if (_manualSubscription.Status == SubscriptionStatus.Closed
+                || _manualSubscription.Status == SubscriptionStatus.Closing)
+                return;
+
+            _manualSubscription.Status = SubscriptionStatus.Closing;
+            try
+            {
+                await _closeAsync().ConfigureAwait(false);
+            }
+            finally
+            {
+                _manualSubscription.Status = SubscriptionStatus.Closed;
+            }
+        }
+
+        internal Task ReconnectAsync()
+        {
+            return _reconnectAsync();
+        }
+
+        internal Task<CallResult> ResubscribeAsync()
+        {
+            return _resubscribeAsync();
+        }
+
+        private class ManualSubscription : Subscription
+        {
+            public ManualSubscription()
+                : base(NullLogger.Instance, false)
+            {
+                MessageRouter = MessageRouter.Create();
+            }
+
+            protected override Query? GetSubQuery(SocketConnection connection)
+            {
+                return null;
+            }
+
+            protected override Query? GetUnsubQuery(SocketConnection connection)
+            {
+                return null;
+            }
+        }
+    }
+}

CryptoExchange.Net/Objects/Sockets/UpdateSubscription.cs

@@ -12,7 +12,8 @@ namespace CryptoExchange.Net.Objects.Sockets
     /// </summary>
     public class UpdateSubscription
     {
-        private readonly SocketConnection _connection;
+        private readonly SocketConnection? _connection;
+        private readonly ManualUpdateSubscription? _manualSubscription;
         internal readonly Subscription _subscription;
 
 #if NET9_0_OR_GREATER
@@ -102,7 +103,7 @@ namespace CryptoExchange.Net.Objects.Sockets
         /// <summary>
         /// The id of the socket
         /// </summary>
-        public int SocketId => _connection.SocketId;
+        public int SocketId => _connection?.SocketId ?? _manualSubscription!.SocketId;
 
         /// <summary>
         /// The id of the subscription
@@ -112,12 +113,12 @@ namespace CryptoExchange.Net.Objects.Sockets
         /// <summary>
         /// The last timestamp anything was received from the server
         /// </summary>
-        public DateTime? LastReceiveTime => _connection.LastReceiveTime;
+        public DateTime? LastReceiveTime => _connection?.LastReceiveTime ?? _manualSubscription!.LastReceiveTime;
 
         /// <summary>
         /// The current websocket status
         /// </summary>
-        public SocketStatus SocketStatus => _connection.Status;
+        public SocketStatus SocketStatus => _connection?.Status ?? _manualSubscription!.SocketStatus;
 
         /// <summary>
         /// The current subscription status
@@ -143,6 +144,18 @@ namespace CryptoExchange.Net.Objects.Sockets
             _subscription.StatusChanged += (x) => SubscriptionStatusChanged?.Invoke(x);
         }
 
+        /// <summary>
+        /// ctor
+        /// </summary>
+        /// <param name="manualSubscription">The manual subscription for controlling events and data</param>
+        /// <param name="subscription">The subscription</param>
+        internal UpdateSubscription(ManualUpdateSubscription manualSubscription, Subscription subscription)
+        {
+            _manualSubscription = manualSubscription;
+            _subscription = subscription;
+            _subscription.StatusChanged += (x) => SubscriptionStatusChanged?.Invoke(x);
+        }
+
         private void UnsubscribeConnectionEvents()
         {
             lock (_eventLock)
@@ -150,22 +163,26 @@ namespace CryptoExchange.Net.Objects.Sockets
                 if (!_connectionEventsSubscribed)
                     return;
 
-                _connection.ConnectionClosed -= HandleConnectionClosedEvent;
-                _connection.ConnectionLost -= HandleConnectionLostEvent;
-                _connection.ConnectionRestored -= HandleConnectionRestoredEvent;
-                _connection.ResubscribingFailed -= HandleResubscribeFailedEvent;
-                _connection.ActivityPaused -= HandlePausedEvent;
-                _connection.ActivityUnpaused -= HandleUnpausedEvent;
+                if (_connection != null)
+                {
+                    _connection.ConnectionClosed -= HandleConnectionClosedEvent;
+                    _connection.ConnectionLost -= HandleConnectionLostEvent;
+                    _connection.ConnectionRestored -= HandleConnectionRestoredEvent;
+                    _connection.ResubscribingFailed -= HandleResubscribeFailedEvent;
+                    _connection.ActivityPaused -= HandlePausedEvent;
+                    _connection.ActivityUnpaused -= HandleUnpausedEvent;
+                }
+
                 _connectionEventsSubscribed = false;
             }
         }
 
-        private void HandleConnectionClosedEvent()
+        internal void HandleConnectionClosedEvent()
         {
             UnsubscribeConnectionEvents();
 
             // If we're not the subscription closing this connection don't bother emitting
-            if (!_subscription.IsClosingConnection)
+            if (_connection != null && !_subscription.IsClosingConnection)
                 return;
 
             List<Action> handlers;
@@ -176,7 +193,7 @@ namespace CryptoExchange.Net.Objects.Sockets
                 callback();
         }
 
-        private void HandleConnectionLostEvent()
+        internal void HandleConnectionLostEvent()
         {
             if (!_subscription.Active)
             {
@@ -192,7 +209,7 @@ namespace CryptoExchange.Net.Objects.Sockets
                 callback();
         }
 
-        private void HandleConnectionRestoredEvent(TimeSpan period)
+        internal void HandleConnectionRestoredEvent(TimeSpan period)
         {
             if (!_subscription.Active)
             {
@@ -208,7 +225,7 @@ namespace CryptoExchange.Net.Objects.Sockets
                 callback(period);
         }
 
-        private void HandleResubscribeFailedEvent(Error error)
+        internal void HandleResubscribeFailedEvent(Error error)
         {
             if (!_subscription.Active)
             {
@@ -224,7 +241,7 @@ namespace CryptoExchange.Net.Objects.Sockets
                 callback(error);
         }
 
-        private void HandlePausedEvent()
+        internal void HandlePausedEvent()
         {
             if (!_subscription.Active)
             {
@@ -240,7 +257,7 @@ namespace CryptoExchange.Net.Objects.Sockets
                 callback();
         }
 
-        private void HandleUnpausedEvent()
+        internal void HandleUnpausedEvent()
         {
             if (!_subscription.Active)
             {
@@ -262,7 +279,10 @@ namespace CryptoExchange.Net.Objects.Sockets
         /// <returns></returns>
         public Task CloseAsync()
         {
-            return _connection.CloseAsync(_subscription);
+            if (_connection != null)
+                return _connection.CloseAsync(_subscription);
+
+            return _manualSubscription!.CloseAsync();
         }
 
         /// <summary>
@@ -271,7 +291,10 @@ namespace CryptoExchange.Net.Objects.Sockets
         /// <returns></returns>
         public Task ReconnectAsync()
         {
-            return _connection.TriggerReconnectAsync();
+            if (_connection != null)
+                return _connection.TriggerReconnectAsync();
+
+            return _manualSubscription!.ReconnectAsync();
         }
 
         /// <summary>
@@ -280,7 +303,13 @@ namespace CryptoExchange.Net.Objects.Sockets
         /// <returns></returns>
         internal async Task UnsubscribeAsync()
         {
-            await _connection.UnsubscribeAsync(_subscription).ConfigureAwait(false);
+            if (_connection != null)
+            {
+                await _connection.UnsubscribeAsync(_subscription).ConfigureAwait(false);
+                return;
+            }
+
+            await _manualSubscription!.CloseAsync().ConfigureAwait(false);
         }
 
         /// <summary>
@@ -289,7 +318,10 @@ namespace CryptoExchange.Net.Objects.Sockets
         /// <returns></returns>
         internal async Task<CallResult> ResubscribeAsync()
         {
-            return await _connection.ResubscribeAsync(_subscription).ConfigureAwait(false);
+            if (_connection != null)
+                return await _connection.ResubscribeAsync(_subscription).ConfigureAwait(false);
+
+            return await _manualSubscription!.ResubscribeAsync().ConfigureAwait(false);
         }
     }
 }

CryptoExchange.Net/Objects/Sockets/WebSocketParameters.cs

@@ -1,4 +1,5 @@
-using CryptoExchange.Net.RateLimiting.Interfaces;
+using CryptoExchange.Net.RateLimiting;
+using CryptoExchange.Net.RateLimiting.Interfaces;
 using System;
 using System.Collections.Generic;
 using System.Text;
@@ -64,6 +65,17 @@ namespace CryptoExchange.Net.Objects.Sockets
         /// </summary>
         public RateLimitingBehaviour RateLimitingBehavior { get; set; }
 
+        /// <summary>
+        /// A delegate receiving the request definition and the request weight that can be used to determine whether a request should be admitted or rejected based 
+        /// on the request definition and the current rate limit usage ratio. This allows for custom rate limiting logic to be implemented.
+        /// </summary>
+        public Func<RequestDefinition, int, RateLimitAdmission?>? RateLimitAdmissionCallbackOptions { get; set; }
+
+        /// <summary>
+        /// A delegate for retrieving the current rate limit admission decision for a specific request. This allows for custom rate limiting logic to be implemented.
+        /// </summary>
+        public Func<RateLimitAdmission?>? RateLimitAdmissionCallbackRequest { get; set; }
+
         /// <summary>
         /// Encoding for sending/receiving data
         /// </summary>

CryptoExchange.Net/OrderBook/SymbolOrderBook.cs

@@ -262,7 +262,7 @@ namespace CryptoExchange.Net.OrderBook
         }
 
         /// <inheritdoc/>
-        public async Task<CallResult<bool>> StartAsync(CancellationToken? ct = null)
+        public async Task<CallResult> StartAsync(CancellationToken? ct = null)
         {
             if (Status != OrderBookStatus.Disconnected)
                 throw new InvalidOperationException($"Can't start book unless state is {OrderBookStatus.Disconnected}. Current state: {Status}");
@@ -286,10 +286,11 @@ namespace CryptoExchange.Net.OrderBook
             _processTask = Task.Factory.StartNew(ProcessQueue, TaskCreationOptions.LongRunning);
 
             var startResult = await DoStartAsync(_cts.Token).ConfigureAwait(false);
-            if (!startResult)
+            if (!startResult.Success)
             {
                 Status = OrderBookStatus.Disconnected;
-                return new CallResult<bool>(startResult.Error!);
+                _queueEvent.Set();
+                return CallResult.Fail(startResult.Error!);
             }
 
             if (_cts.IsCancellationRequested)
@@ -297,7 +298,7 @@ namespace CryptoExchange.Net.OrderBook
                 _logger.OrderBookStoppedStarting(Api, Symbol);
                 await startResult.Data.CloseAsync().ConfigureAwait(false);
                 Status = OrderBookStatus.Disconnected;
-                return new CallResult<bool>(new CancellationRequestedError());
+                return CallResult.Fail(new CancellationRequestedError());
             }
 
             _subscription = startResult.Data;
@@ -306,7 +307,7 @@ namespace CryptoExchange.Net.OrderBook
             _subscription.ConnectionRestored += HandleConnectionRestored;
 
             Status = OrderBookStatus.Synced;
-            return new CallResult<bool>(true);
+            return CallResult.Ok();
         }
 
         private void HandleConnectionLost() 
@@ -333,17 +334,19 @@ namespace CryptoExchange.Net.OrderBook
         {
             _logger.OrderBookStopping(Api, Symbol);
             _cts?.Cancel();
-            _queueEvent.Set();
-            if (_processTask != null)
-                await _processTask.ConfigureAwait(false);
 
-            if (_subscription != null) {
+            if (_subscription != null)
+            {
                 await _subscription.CloseAsync().ConfigureAwait(false);
                 _subscription.ConnectionLost -= HandleConnectionLost;
                 _subscription.ConnectionClosed -= HandleConnectionClosed;
                 _subscription.ConnectionRestored -= HandleConnectionRestored;
             }
 
+            _queueEvent.Set();
+            if (_processTask != null)
+                await _processTask.ConfigureAwait(false);
+
             Status = OrderBookStatus.Disconnected;
             _logger.OrderBookStopped(Api, Symbol);
         }
@@ -352,7 +355,7 @@ namespace CryptoExchange.Net.OrderBook
         public CallResult<decimal> CalculateAverageFillPrice(decimal baseQuantity, OrderBookEntryType type)
         {
             if (Status != OrderBookStatus.Synced)
-                return new CallResult<decimal>(new InvalidOperationError($"{nameof(CalculateAverageFillPrice)} is not available when book is not in Synced state"));
+                return CallResult<decimal>.Fail(new InvalidOperationError($"{nameof(CalculateAverageFillPrice)} is not available when book is not in Synced state"));
 
             var totalCost = 0m;
             var totalAmount = 0m;
@@ -365,7 +368,7 @@ namespace CryptoExchange.Net.OrderBook
                 while (amountLeft > 0)
                 {
                     if (step == list.Count)
-                        return new CallResult<decimal>(new InvalidOperationError("Quantity is larger than order in the order book"));
+                        return CallResult<decimal>.Fail(new InvalidOperationError("Quantity is larger than order in the order book"));
 
                     var element = list.ElementAt(step);
                     var stepAmount = Math.Min(element.Value.Quantity, amountLeft);
@@ -376,14 +379,14 @@ namespace CryptoExchange.Net.OrderBook
                 }
             }
 
-            return new CallResult<decimal>(Math.Round(totalCost / totalAmount, 8));
+            return CallResult<decimal>.Ok(Math.Round(totalCost / totalAmount, 8));
         }
 
         /// <inheritdoc/>
         public CallResult<decimal> CalculateTradableAmount(decimal quoteQuantity, OrderBookEntryType type)
         {
             if (Status != OrderBookStatus.Synced)
-                return new CallResult<decimal>(new InvalidOperationError($"{nameof(CalculateTradableAmount)} is not available when book is not in Synced state"));
+                return CallResult<decimal>.Fail(new InvalidOperationError($"{nameof(CalculateTradableAmount)} is not available when book is not in Synced state"));
 
             var quoteQuantityLeft = quoteQuantity;
             var totalBaseQuantity = 0m;
@@ -395,7 +398,7 @@ namespace CryptoExchange.Net.OrderBook
                 while (quoteQuantityLeft > 0)
                 {
                     if (step == list.Count)
-                        return new CallResult<decimal>(new InvalidOperationError("Quantity is larger than order in the order book"));
+                        return CallResult<decimal>.Fail(new InvalidOperationError("Quantity is larger than order in the order book"));
 
                     var element = list.ElementAt(step);
                     var stepAmount = Math.Min(element.Value.Quantity * element.Value.Price, quoteQuantityLeft);
@@ -405,7 +408,7 @@ namespace CryptoExchange.Net.OrderBook
                 }
             }
 
-            return new CallResult<decimal>(Math.Round(totalBaseQuantity, 8));
+            return CallResult<decimal>.Ok(Math.Round(totalBaseQuantity, 8));
         }
 
         /// <summary>
@@ -424,7 +427,7 @@ namespace CryptoExchange.Net.OrderBook
         /// Resync the order book
         /// </summary>
         /// <returns></returns>
-        protected abstract Task<CallResult<bool>> DoResyncAsync(CancellationToken ct);
+        protected abstract Task<CallResult> DoResyncAsync(CancellationToken ct);
 
         /// <summary>
         /// Implementation for validating a checksum value with the current order book. If checksum validation fails (returns false)
@@ -603,10 +606,9 @@ namespace CryptoExchange.Net.OrderBook
             var listToChange = type == OrderBookEntryType.Ask ? _asks : _bids;
             if (entry.Quantity == 0)
             {
-                if (!listToChange.ContainsKey(entry.Price))
+                if (!listToChange.Remove(entry.Price))
                     return true;
 
-                listToChange.Remove(entry.Price);
                 if (type == OrderBookEntryType.Ask) AskCount--;
                 else BidCount--;
             }
@@ -633,16 +635,16 @@ namespace CryptoExchange.Net.OrderBook
         /// <param name="timeout">Max wait time</param>
         /// <param name="ct">Cancellation token</param>
         /// <returns></returns>
-        protected async Task<CallResult<bool>> WaitForSetOrderBookAsync(TimeSpan timeout, CancellationToken ct)
+        protected async Task<CallResult> WaitForSetOrderBookAsync(TimeSpan timeout, CancellationToken ct)
         {
             var startWait = DateTime.UtcNow;
             while (!_bookSet && Status == OrderBookStatus.Syncing)
             {
                 if(ct.IsCancellationRequested)
-                    return new CallResult<bool>(new CancellationRequestedError());
+                    return CallResult.Fail(new CancellationRequestedError());
 
                 if (DateTime.UtcNow - startWait > timeout)
-                    return new CallResult<bool>(new ServerError(new ErrorInfo(ErrorType.OrderBookTimeout, "Timeout while waiting for data")));
+                    return CallResult.Fail(new ServerError(new ErrorInfo(ErrorType.OrderBookTimeout, "Timeout while waiting for data")));
 
                 try
                 {
@@ -652,7 +654,7 @@ namespace CryptoExchange.Net.OrderBook
                 { }
             }
 
-            return new CallResult<bool>(true);
+            return CallResult.Ok();
         }
 
         /// <summary>
@@ -668,10 +670,10 @@ namespace CryptoExchange.Net.OrderBook
             while (_processBuffer.Count == 0)
             {
                 if (ct.IsCancellationRequested)
-                    return new CallResult(new CancellationRequestedError());
+                    return CallResult.Fail(new CancellationRequestedError());
 
                 if (DateTime.UtcNow - startWait > maxWait)
-                    return new CallResult(new ServerError(new ErrorInfo(ErrorType.OrderBookTimeout, "Timeout while waiting for data")));
+                    return CallResult.Fail(new ServerError(new ErrorInfo(ErrorType.OrderBookTimeout, "Timeout while waiting for data")));
 
                 try
                 {
@@ -688,7 +690,7 @@ namespace CryptoExchange.Net.OrderBook
                     await Task.Delay(minWait.Value - dif).ConfigureAwait(false);
             }
 
-            return CallResult.SuccessResult;
+            return CallResult.Ok();
         }
 
         /// <summary>
@@ -807,7 +809,7 @@ namespace CryptoExchange.Net.OrderBook
                     return;
 
                 var resyncResult = await DoResyncAsync(_cts!.Token).ConfigureAwait(false);
-                success = resyncResult;
+                success = resyncResult.Success;
             }
 
             _logger.OrderBookResynced(Api, Symbol);
@@ -833,7 +835,7 @@ namespace CryptoExchange.Net.OrderBook
 
                     if (item is OrderBookSnapshot snapshot)
                         ProcessOrderBookSnapshot(snapshot);
-                    if (item is OrderBookUpdate update)
+                    else if (item is OrderBookUpdate update)
                         ProcessQueueItem(update);
                     else if (item is OrderBookChecksum checksum)
                         ProcessChecksum(checksum);
@@ -961,7 +963,8 @@ namespace CryptoExchange.Net.OrderBook
                 await _subscription!.UnsubscribeAsync().ConfigureAwait(false);
                 Reset();
                 _stopProcessing = false;
-                if (!await _subscription!.ResubscribeAsync().ConfigureAwait(false))
+                var resubResult = await _subscription!.ResubscribeAsync().ConfigureAwait(false);
+                if (!resubResult.Success)
                 {
                     // Resubscribing failed, reconnect the socket
                     _logger.OrderBookResyncFailed(Api, Symbol);
@@ -1053,10 +1056,12 @@ namespace CryptoExchange.Net.OrderBook
 
         private SequenceNumberResult ValidateLiveSequenceNumber(long sequenceNumber)
         {
-            if (sequenceNumber < LastSequenceNumber 
+            if (sequenceNumber < LastSequenceNumber
                 && (_firstUpdateAfterSnapshotDone || !_skipSequenceCheckFirstUpdateAfterSnapshotSet))
+            {
                 // Update is somehow from before the current state
                 return SequenceNumberResult.OutOfSync;
+            }
 
             if (_sequencesAreConsecutive
                 && LastSequenceNumber != 0

CryptoExchange.Net/RateLimiting/Filters/AuthenticatedEndpointFilter.cs

@@ -20,7 +20,7 @@ namespace CryptoExchange.Net.RateLimiting.Filters
         }
 
         /// <inheritdoc />
-        public bool Passes(RateLimitItemType type, RequestDefinition definition, string host, string? apiKey)
+        public bool Passes(RateLimitItemType type, RequestDefinition definition, string? apiKey)
             => definition.Authenticated == _authenticated;
     }
 }

CryptoExchange.Net/RateLimiting/Filters/ExactPathFilter.cs

@@ -21,7 +21,7 @@ namespace CryptoExchange.Net.RateLimiting.Filters
         }
 
         /// <inheritdoc />
-        public bool Passes(RateLimitItemType type, RequestDefinition definition, string host, string? apiKey)
+        public bool Passes(RateLimitItemType type, RequestDefinition definition, string? apiKey)
             => string.Equals(definition.Path, _path, StringComparison.OrdinalIgnoreCase);
     }
 }

CryptoExchange.Net/RateLimiting/Filters/ExactPathsFilter.cs

@@ -21,7 +21,7 @@ namespace CryptoExchange.Net.RateLimiting.Filters
         }
 
         /// <inheritdoc />
-        public bool Passes(RateLimitItemType type, RequestDefinition definition, string host, string? apiKey)
+        public bool Passes(RateLimitItemType type, RequestDefinition definition, string? apiKey)
             => _paths.Contains(definition.Path);
     }
 }

CryptoExchange.Net/RateLimiting/Filters/HostFilter.cs

@@ -20,8 +20,8 @@ namespace CryptoExchange.Net.RateLimiting.Filters
         }
 
         /// <inheritdoc />
-        public bool Passes(RateLimitItemType type, RequestDefinition definition, string host, string? apiKey)
-            => host.Equals(_host, System.StringComparison.InvariantCulture);
+        public bool Passes(RateLimitItemType type, RequestDefinition definition, string? apiKey)
+            => definition.BaseAddress.Equals(_host, System.StringComparison.InvariantCulture);
 
     }
 }

CryptoExchange.Net/RateLimiting/Filters/LimitItemTypeFilter.cs

@@ -20,7 +20,7 @@ namespace CryptoExchange.Net.RateLimiting.Filters
         }
 
         /// <inheritdoc />
-        public bool Passes(RateLimitItemType type, RequestDefinition definition, string host, string? apiKey)
+        public bool Passes(RateLimitItemType type, RequestDefinition definition, string? apiKey)
             => type == _type;
     }
 }

CryptoExchange.Net/RateLimiting/Filters/PathStartFilter.cs

@@ -21,7 +21,7 @@ namespace CryptoExchange.Net.RateLimiting.Filters
         }
 
         /// <inheritdoc />
-        public bool Passes(RateLimitItemType type, RequestDefinition definition, string host, string? apiKey)
+        public bool Passes(RateLimitItemType type, RequestDefinition definition, string? apiKey)
             => definition.Path.TrimStart('/').StartsWith(_path, StringComparison.OrdinalIgnoreCase);
     }
 }

CryptoExchange.Net/RateLimiting/Guards/RateLimitGuard.cs

@@ -3,6 +3,7 @@ using CryptoExchange.Net.RateLimiting.Interfaces;
 using CryptoExchange.Net.RateLimiting.Trackers;
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using System.Threading;
 
 namespace CryptoExchange.Net.RateLimiting.Guards
@@ -13,30 +14,31 @@ namespace CryptoExchange.Net.RateLimiting.Guards
         /// <summary>
         /// Apply guard per host
         /// </summary>
-        public static Func<RequestDefinition, string, string?, string> PerHost { get; } = new Func<RequestDefinition, string, string?, string>((def, host, key) => host);
+        public static Func<RequestDefinition, string?, string> PerHost { get; } = new Func<RequestDefinition, string?, string>((def, key) => def.BaseAddress);
         /// <summary>
         /// Apply guard per endpoint
         /// </summary>
-        public static Func<RequestDefinition, string, string?, string> PerEndpoint { get; } = new Func<RequestDefinition, string, string?, string>((def, host, key) => def.Path + def.Method);
+        public static Func<RequestDefinition, string?, string> PerEndpoint { get; } = new Func<RequestDefinition, string?, string>((def, key) => def.Path + def.Method);
         /// <summary>
         /// Apply guard per connection
         /// </summary>
-        public static Func<RequestDefinition, string, string?, string> PerConnection { get; } = new Func<RequestDefinition, string, string?, string>((def, host, key) => def.ConnectionId.ToString()!);
+        public static Func<RequestDefinition, string?, string> PerConnection { get; } = new Func<RequestDefinition, string?, string>((def, key) => def.ConnectionId.ToString()!);
         /// <summary>
         /// Apply guard per API key
         /// </summary>
-        public static Func<RequestDefinition, string, string?, string> PerApiKey { get; } = new Func<RequestDefinition, string, string?, string>((def, host, key) => key!);
+        public static Func<RequestDefinition, string?, string> PerApiKey { get; } = new Func<RequestDefinition, string?, string>((def, key) => key!);
         /// <summary>
         /// Apply guard per API key per endpoint
         /// </summary>
-        public static Func<RequestDefinition, string, string?, string> PerApiKeyPerEndpoint { get; } = new Func<RequestDefinition, string, string?, string>((def, host, key) => key! + def.Path + def.Method);
+        public static Func<RequestDefinition, string?, string> PerApiKeyPerEndpoint { get; } = new Func<RequestDefinition, string?, string>((def, key) => key! + def.Path + def.Method);
 
         private readonly IEnumerable<IGuardFilter> _filters;
         private readonly Dictionary<string, IWindowTracker> _trackers;
         private readonly RateLimitWindowType _windowType;
         private readonly double? _decayRate;
+        private readonly TimeSpan _safetyMargin;
         private readonly int? _connectionWeight;
-        private readonly Func<RequestDefinition, string, string?, string> _keySelector;
+        private readonly Func<RequestDefinition, string?, string> _keySelector;
         private readonly SemaphoreSlim? _sharedGuardSemaphore;
 
         /// <inheritdoc />
@@ -53,6 +55,10 @@ namespace CryptoExchange.Net.RateLimiting.Guards
         /// The time period for the limit
         /// </summary>
         public TimeSpan TimeSpan { get; }
+        /// <summary>
+        /// Additional time to wait after a rate limit window expires to account for latency and timing differences
+        /// </summary>
+        public TimeSpan SafetyMargin => _safetyMargin;
 
         /// <summary>
         /// Whether this guard is shared between multiple gates
@@ -67,11 +73,12 @@ namespace CryptoExchange.Net.RateLimiting.Guards
         /// <param name="limit">Limit per period</param>
         /// <param name="timeSpan">Timespan for the period</param>
         /// <param name="windowType">Type of rate limit window</param>
+        /// <param name="safetyMargin">Additional time to wait after a window expires, or null to use the default margin</param>
         /// <param name="decayPerTimeSpan">The decay per timespan if windowType is DecayWindowTracker</param>
         /// <param name="connectionWeight">The weight of a new connection</param>
         /// <param name="shared">Whether this guard is shared between multiple gates</param>
-        public RateLimitGuard(Func<RequestDefinition, string, string?, string> keySelector, IGuardFilter filter, int limit, TimeSpan timeSpan, RateLimitWindowType windowType, double? decayPerTimeSpan = null, int? connectionWeight = null, bool shared = false)
-            : this(keySelector, new[] { filter }, limit, timeSpan, windowType, decayPerTimeSpan, connectionWeight, shared)
+        public RateLimitGuard(Func<RequestDefinition, string?, string> keySelector, IGuardFilter filter, int limit, TimeSpan timeSpan, RateLimitWindowType windowType, double? decayPerTimeSpan = null, int? connectionWeight = null, bool shared = false, TimeSpan? safetyMargin = null)
+            : this(keySelector, new[] { filter }, limit, timeSpan, windowType, decayPerTimeSpan, connectionWeight, shared, safetyMargin)
         {
         }
 
@@ -83,10 +90,11 @@ namespace CryptoExchange.Net.RateLimiting.Guards
         /// <param name="limit">Limit per period</param>
         /// <param name="timeSpan">Timespan for the period</param>
         /// <param name="windowType">Type of rate limit window</param>
+        /// <param name="safetyMargin">Additional time to wait after a window expires, or null to use the default margin</param>
         /// <param name="decayPerTimeSpan">The decay per timespan if windowType is DecayWindowTracker</param>
         /// <param name="connectionWeight">The weight of a new connection</param>
         /// <param name="shared">Whether this guard is shared between multiple gates</param>
-        public RateLimitGuard(Func<RequestDefinition, string, string?, string> keySelector, IEnumerable<IGuardFilter> filters, int limit, TimeSpan timeSpan, RateLimitWindowType windowType, double? decayPerTimeSpan = null, int? connectionWeight = null, bool shared = false)
+        public RateLimitGuard(Func<RequestDefinition, string?, string> keySelector, IEnumerable<IGuardFilter> filters, int limit, TimeSpan timeSpan, RateLimitWindowType windowType, double? decayPerTimeSpan = null, int? connectionWeight = null, bool shared = false, TimeSpan? safetyMargin = null)
         {
             _filters = filters;
             _trackers = new Dictionary<string, IWindowTracker>();
@@ -96,6 +104,7 @@ namespace CryptoExchange.Net.RateLimiting.Guards
             SharedGuard = shared;
             _keySelector = keySelector;
             _decayRate = decayPerTimeSpan;
+            _safetyMargin = safetyMargin ?? WindowTrackerHelpers.GetDefaultSafetyMargin(timeSpan); ;
             _connectionWeight = connectionWeight;
 
             if (SharedGuard)
@@ -103,11 +112,11 @@ namespace CryptoExchange.Net.RateLimiting.Guards
         }
 
         /// <inheritdoc />
-        public LimitCheck Check(RateLimitItemType type, RequestDefinition definition, string host, string? apiKey, int requestWeight, string? keySuffix)
+        public LimitCheck Check(RateLimitItemType type, RequestDefinition definition, string? apiKey, int requestWeight, string? keySuffix, double allowedRateRatio)
         {
             foreach (var filter in _filters)
             {
-                if (!filter.Passes(type, definition, host, apiKey))
+                if (!filter.Passes(type, definition, apiKey))
                     return LimitCheck.NotApplicable;
             }
 
@@ -119,15 +128,14 @@ namespace CryptoExchange.Net.RateLimiting.Guards
 
             try
             {
-                var key = _keySelector(definition, host, apiKey) + keySuffix;
+                var key = _keySelector(definition, apiKey) + keySuffix;
                 if (!_trackers.TryGetValue(key, out var tracker))
                 {
                     tracker = CreateTracker();
                     _trackers.Add(key, tracker);
                 }
 
-
-                var delay = tracker.GetWaitTime(requestWeight);
+                var delay = tracker.GetWaitTime(requestWeight, allowedRateRatio);
                 if (delay == default)
                     return LimitCheck.NotNeeded(Limit, TimeSpan, tracker.Current);
 
@@ -141,11 +149,11 @@ namespace CryptoExchange.Net.RateLimiting.Guards
         }
 
         /// <inheritdoc />
-        public RateLimitState ApplyWeight(RateLimitItemType type, RequestDefinition definition, string host, string? apiKey, int requestWeight, string? keySuffix)
+        public RateLimitState ApplyWeight(RateLimitItemType type, RequestDefinition definition, string? apiKey, int requestWeight, string? keySuffix)
         {
             foreach (var filter in _filters)
             {
-                if (!filter.Passes(type, definition, host, apiKey))
+                if (!filter.Passes(type, definition, apiKey))
                     return RateLimitState.NotApplied;
             }
 
@@ -153,7 +161,7 @@ namespace CryptoExchange.Net.RateLimiting.Guards
                 requestWeight = _connectionWeight ?? requestWeight;
 
 
-            var key = _keySelector(definition, host, apiKey) + keySuffix;
+            var key = _keySelector(definition, apiKey) + keySuffix;
             var tracker = _trackers[key];
 
             if (SharedGuard)
@@ -172,15 +180,42 @@ namespace CryptoExchange.Net.RateLimiting.Guards
             return RateLimitState.Applied(Limit, TimeSpan, tracker.Current);
         }
 
+        /// <inheritdoc />
+        public void Reset(RateLimitItemType type, RequestDefinition definition, string? apiKey, string? keySuffix, int? amount)
+        {
+            foreach (var filter in _filters)
+            {
+                if (!filter.Passes(type, definition, apiKey))
+                    return;
+            }
+
+            if (SharedGuard)
+                _sharedGuardSemaphore!.Wait();
+
+            try
+            {
+                var key = _keySelector(definition, apiKey) + keySuffix;
+                if (!_trackers.TryGetValue(key, out var tracker))
+                    return;
+
+                tracker.Reset(amount);
+            }
+            finally
+            {
+                if (SharedGuard)
+                    _sharedGuardSemaphore!.Release();
+            }
+        }
+
         /// <summary>
         /// Create a new WindowTracker
         /// </summary>
         /// <returns></returns>
         protected IWindowTracker CreateTracker()
         {
-            return _windowType == RateLimitWindowType.Sliding ? new SlidingWindowTracker(Limit, TimeSpan)
-                : _windowType == RateLimitWindowType.Fixed ? new FixedWindowTracker(Limit, TimeSpan)
-                : _windowType == RateLimitWindowType.FixedAfterFirst ? new FixedAfterStartWindowTracker(Limit, TimeSpan) :
+            return _windowType == RateLimitWindowType.Sliding ? new SlidingWindowTracker(Limit, TimeSpan, _safetyMargin)
+                : _windowType == RateLimitWindowType.Fixed ? new FixedWindowTracker(Limit, TimeSpan, _safetyMargin)
+                : _windowType == RateLimitWindowType.FixedAfterFirst ? new FixedAfterStartWindowTracker(Limit, TimeSpan, _safetyMargin) :
                 new DecayWindowTracker(Limit, TimeSpan, _decayRate ?? throw new InvalidOperationException("Decay rate not provided"));
         }
     }

CryptoExchange.Net/RateLimiting/Guards/RetryAfterGuard.cs

@@ -42,7 +42,7 @@ namespace CryptoExchange.Net.RateLimiting.Guards
         }
 
         /// <inheritdoc />
-        public LimitCheck Check(RateLimitItemType type, RequestDefinition definition, string host, string? apiKey, int requestWeight, string? keySuffix)
+        public LimitCheck Check(RateLimitItemType type, RequestDefinition definition, string? apiKey, int requestWeight, string? keySuffix, double allowedRateRatio)
         {
             if (type != Type)
                 return LimitCheck.NotApplicable;
@@ -55,7 +55,7 @@ namespace CryptoExchange.Net.RateLimiting.Guards
         }
 
         /// <inheritdoc />
-        public RateLimitState ApplyWeight(RateLimitItemType type, RequestDefinition definition, string host, string? apiKey, int requestWeight, string? keySuffix)
+        public RateLimitState ApplyWeight(RateLimitItemType type, RequestDefinition definition, string? apiKey, int requestWeight, string? keySuffix)
         {
             return RateLimitState.NotApplied;
         }
@@ -65,5 +65,11 @@ namespace CryptoExchange.Net.RateLimiting.Guards
         /// </summary>
         /// <param name="after"></param>
         public void UpdateAfter(DateTime after) => After = after;
+
+        /// <inheritdoc />
+        public void Reset(RateLimitItemType type, RequestDefinition definition, string? apiKey, string? keySuffix, int? amount)
+        {
+            After = DateTime.UtcNow;
+        }
     }
 }

CryptoExchange.Net/RateLimiting/Guards/SingleLimitGuard.cs

@@ -14,25 +14,31 @@ namespace CryptoExchange.Net.RateLimiting.Guards
         /// <summary>
         /// Default endpoint limit
         /// </summary>
-        public static Func<RequestDefinition, string, string?, string> Default { get; } = new Func<RequestDefinition, string, string?, string>((def, host, key) => def.Path + def.Method);
+        public static Func<RequestDefinition, string?, string> Default { get; } = new Func<RequestDefinition, string?, string>((def, key) => def.Path + def.Method);
 
         /// <summary>
         /// Endpoint limit per API key
         /// </summary>
-        public static Func<RequestDefinition, string, string?, string> PerApiKey { get; } = new Func<RequestDefinition, string, string?, string>((def, host, key) => def.Path + def.Method + key);
+        public static Func<RequestDefinition, string?, string> PerApiKey { get; } = new Func<RequestDefinition, string?, string>((def, key) => def.Path + def.Method + key);
 
         private readonly Dictionary<string, IWindowTracker> _trackers;
         private readonly RateLimitWindowType _windowType;
         private readonly double? _decayRate;
+        private readonly TimeSpan _safetyMargin;
         private readonly int _limit;
         private readonly TimeSpan _period;
-        private readonly Func<RequestDefinition, string, string?, string> _keySelector;
+        private readonly Func<RequestDefinition, string?, string> _keySelector;
 
         /// <inheritdoc />
         public string Name => "EndpointLimitGuard";
 
         /// <inheritdoc />
-        public string Description => $"Limit requests to endpoint";
+        public string Description => _windowType == RateLimitWindowType.Decay ? $"Endpoint limit of {_limit} with a decay rate of {_decayRate}" : $"Limit of {_limit} per {_period}";
+
+        /// <summary>
+        /// Additional time to wait after a rate limit window expires to account for latency and timing differences
+        /// </summary>
+        public TimeSpan SafetyMargin => _safetyMargin;
 
         /// <summary>
         /// ctor
@@ -41,28 +47,30 @@ namespace CryptoExchange.Net.RateLimiting.Guards
             int limit,
             TimeSpan period,
             RateLimitWindowType windowType,
-            double? decayRate = null,
-            Func<RequestDefinition, string, string?, string>? keySelector = null)
+            TimeSpan? safetyMargin = null,
+            Func<RequestDefinition, string?, string>? keySelector = null,
+            double? decayRate = null)
         {
             _limit = limit;
             _period = period;
             _windowType = windowType;
             _decayRate = decayRate;
+            _safetyMargin = safetyMargin ?? WindowTrackerHelpers.GetDefaultSafetyMargin(period);
             _keySelector = keySelector ?? Default;
             _trackers = new Dictionary<string, IWindowTracker>();
         }
 
         /// <inheritdoc />
-        public LimitCheck Check(RateLimitItemType type, RequestDefinition definition, string host, string? apiKey, int requestWeight, string? keySuffix)
+        public LimitCheck Check(RateLimitItemType type, RequestDefinition definition, string? apiKey, int requestWeight, string? keySuffix, double allowedRateRatio)
         {
-            var key = _keySelector(definition, host, apiKey) + keySuffix;
+            var key = _keySelector(definition, apiKey) + keySuffix;
             if (!_trackers.TryGetValue(key, out var tracker))
             {
                 tracker = CreateTracker();
                 _trackers.Add(key, tracker);
             }
 
-            var delay = tracker.GetWaitTime(requestWeight);
+            var delay = tracker.GetWaitTime(requestWeight, allowedRateRatio);
             if (delay == default)
                 return LimitCheck.NotNeeded(_limit, _period, tracker.Current);
 
@@ -70,9 +78,9 @@ namespace CryptoExchange.Net.RateLimiting.Guards
         }
 
         /// <inheritdoc />
-        public RateLimitState ApplyWeight(RateLimitItemType type, RequestDefinition definition, string host, string? apiKey, int requestWeight, string? keySuffix)
+        public RateLimitState ApplyWeight(RateLimitItemType type, RequestDefinition definition, string? apiKey, int requestWeight, string? keySuffix)
         {
-            var key = _keySelector(definition, host, apiKey) + keySuffix;
+            var key = _keySelector(definition, apiKey) + keySuffix;
             var tracker = _trackers[key];
             tracker.ApplyWeight(requestWeight);
             return RateLimitState.Applied(_limit, _period, tracker.Current);
@@ -84,9 +92,19 @@ namespace CryptoExchange.Net.RateLimiting.Guards
         /// <returns></returns>
         protected IWindowTracker CreateTracker()
         {
-            return _windowType == RateLimitWindowType.Sliding ? new SlidingWindowTracker(_limit, _period)
-                : _windowType == RateLimitWindowType.Fixed ? new FixedWindowTracker(_limit, _period) :
+            return _windowType == RateLimitWindowType.Sliding ? new SlidingWindowTracker(_limit, _period, _safetyMargin)
+                : _windowType == RateLimitWindowType.Fixed ? new FixedWindowTracker(_limit, _period, _safetyMargin) :
                 new DecayWindowTracker(_limit, _period, _decayRate ?? throw new InvalidOperationException("Decay rate not provided"));
         }
+
+        /// <inheritdoc />
+        public void Reset(RateLimitItemType type, RequestDefinition definition, string? apiKey, string? keySuffix, int? amount)
+        {
+            var key = _keySelector(definition, apiKey) + keySuffix;
+            if (!_trackers.TryGetValue(key, out var tracker))
+                return;
+
+            tracker.Reset(amount);
+        }
     }
 }

CryptoExchange.Net/RateLimiting/Interfaces/IGuardFilter.cs

@@ -12,9 +12,8 @@ namespace CryptoExchange.Net.RateLimiting.Interfaces
         /// </summary>
         /// <param name="type">The type of item</param>
         /// <param name="definition">The request definition</param>
-        /// <param name="host">The host address</param>
         /// <param name="apiKey">The API key</param>
         /// <returns>True if passed</returns>
-        bool Passes(RateLimitItemType type, RequestDefinition definition, string host, string? apiKey);
+        bool Passes(RateLimitItemType type, RequestDefinition definition, string? apiKey);
     }
 }