Updated to version 10.0.0

Performance update:

Authentication
	Added Ed25519 signing support for NET8.0 and newer
	Added static methods on ApiCredentials to create credentials of a specific type
	Added static ApiCredentials.ReadFromFile method to read a key from file
	Added required abstract SupportedCredentialTypes property on AuthenticationProvider base class

General Performance
	Added checks before logging statements to prevent overhead of building the log string if logging is not needed	
	Added ExchangeHelpers.ProcessQueuedAsync method to process updates async
	Replaced locking object types from object to Lock in NET9.0 and newer 
	Replaced some Task response types with ValueTask to prevent allocation overhead on hot paths
	Updated Json ArrayConverter to reduce some allocation overhead 
	Updated Json BoolConverter to prevent boxing
	Updated Json DateTimeConverter to prevent boxing
	Updated Json EnumConverter caching to reduce lookup overhead
	Updated ExtensionMethods.CreateParamString to reduce allocations
	Updated ExtensionMethods.AppendPath to reduce overhead	

REST 
	Refactored REST message processing to separate IRestMessageHandler instance
	Split RestApiClient.PrepareAsync into CheckTimeSync and RateLimitAsync
	Updated IRequest.Accept type from string to MediaTypeWithQualityHeaderValue to prevent creation on each request
	Updated IRequest.GetHeaders response type from KeyValuePair<string, string[]>[] to HttpRequestHeaders to prevent additional mapping
	Updated IResponse.ResponseHeaders type from KeyValuePair<string, string[]>[] to HttpResponseHeaders to prevent additional mapping
	Updated WebCallResult RequestHeaders and ResponseHeaders types to HttpRequestHeaders and HttpResponseHeaders	
	Removed unnecessary empty dictionary initializations for each request
	Removed CallResult creation in internal methods to prevent having to create multiple versions for different result types 

Socket
	Added HighPerformance websocket client implementation which significantly reduces memory overhead and improves speed but with certain limitations
	Added MaxIndividualSubscriptionsPerConnection setting in SocketApiClient to limit the number of individual stream subscriptions on a connection
	Added SocketIndividualSubscriptionCombineTarget option to set the target number of individual stream subscriptions per connection
	Added new websocket message handling logic which is faster and reduces memory allocation
	Added UseUpdatedDeserialization option to toggle between updated deserialization and old deserialization 
	Added Exchange property to DataEvent to prevent additional mapping overhead for Shared apis
	Refactored message callback to be sync instead of async to prevent async overhead
	Refactored CryptoExchangeWebSocketClient.IncomingKbps calculation to significantly reduce overhead
	Moved websocket client creation from SocketApiClient to SocketConnection	
	Removed DataEvent.As and DataEvent.ToCallResult methods in favor of single ToType method
	Removed DataEvent creation on lower levels to prevent having to create multiple versions for different result types
	Removed Subscription<TSubResponse, TUnsubResponse> as its no longer used

Other
	Added null check to ParameterCollection for required parameters 
	Added Net10.0 target framework
	Updated dependency versions
	Updated Shared asset aliases check to be culture invariant
	Updated Error string representation
	Updated some namespaces
	Updated SymbolOrderBook processing of buffered updates to prevent additional allocation
	Removed ExchangeEvent type which is no longer needed
	Removed unused usings

.github/workflows/dotnet.yml

@@ -16,7 +16,7 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 8.0.x
+        dotnet-version: 10.0.x
     - name: Restore dependencies
       run: dotnet restore
     - name: Build

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

@@ -0,0 +1,530 @@
+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

@@ -0,0 +1,53 @@
+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

@@ -0,0 +1,47 @@
+<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>9.13.0</PackageVersion>
+    <AssemblyVersion>9.13.0</AssemblyVersion>
+    <FileVersion>9.13.0</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="9.13.0" />
+    <PackageReference Include="protobuf-net" Version="3.2.56" />
+  </ItemGroup>
+</Project>

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

@@ -0,0 +1,128 @@
+<?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

@@ -0,0 +1,46 @@
+# ![.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 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

@@ -4,7 +4,6 @@ using NUnit.Framework.Legacy;
 using System;
 using System.Collections.Generic;
 using System.Linq;
-using System.Text;
 using System.Threading.Tasks;
 
 namespace CryptoExchange.Net.UnitTests
@@ -106,6 +105,7 @@ namespace CryptoExchange.Net.UnitTests
             for(var i = 1; i <= 10; i++)
             {
                 evnt.Set();
+                await Task.Delay(1); // Wait for the continuation.
                 Assert.That(10 - i == waiters.Count(w => w.Status != TaskStatus.RanToCompletion));
             }
 

CryptoExchange.Net.UnitTests/BaseClientTests.cs

@@ -1,11 +1,5 @@
-using CryptoExchange.Net.Authentication;
-using CryptoExchange.Net.Objects;
-using CryptoExchange.Net.UnitTests.TestImplementations;
-using Microsoft.Extensions.Logging;
-using NUnit.Framework;
+using NUnit.Framework;
 using NUnit.Framework.Legacy;
-using System;
-using System.Collections.Generic;
 
 namespace CryptoExchange.Net.UnitTests
 {

CryptoExchange.Net.UnitTests/CallResultTests.cs

@@ -1,12 +1,11 @@
 using CryptoExchange.Net.Objects;
+using CryptoExchange.Net.Objects.Errors;
 using NUnit.Framework;
 using NUnit.Framework.Legacy;
 using System;
 using System.Collections.Generic;
-using System.Linq;
+using System.Net;
 using System.Net.Http;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace CryptoExchange.Net.UnitTests
 {
@@ -16,9 +15,9 @@ namespace CryptoExchange.Net.UnitTests
         [Test]
         public void TestBasicErrorCallResult()
         {
-            var result = new CallResult(new ServerError("TestError"));
+            var result = new CallResult(new ServerError("TestError", ErrorInfo.Unknown));
 
-            ClassicAssert.AreSame(result.Error.Message, "TestError");
+            ClassicAssert.AreSame(result.Error.ErrorCode, "TestError");
             ClassicAssert.IsFalse(result);
             ClassicAssert.IsFalse(result.Success);
         }
@@ -36,9 +35,9 @@ namespace CryptoExchange.Net.UnitTests
         [Test]
         public void TestCallResultError()
         {
-            var result = new CallResult<object>(new ServerError("TestError"));
+            var result = new CallResult<object>(new ServerError("TestError", ErrorInfo.Unknown));
 
-            ClassicAssert.AreSame(result.Error.Message, "TestError");
+            ClassicAssert.AreSame(result.Error.ErrorCode, "TestError");
             ClassicAssert.IsNull(result.Data);
             ClassicAssert.IsFalse(result);
             ClassicAssert.IsFalse(result.Success);
@@ -71,11 +70,11 @@ namespace CryptoExchange.Net.UnitTests
         [Test]
         public void TestCallResultErrorAs()
         {
-            var result = new CallResult<TestObjectResult>(new ServerError("TestError"));
+            var result = new CallResult<TestObjectResult>(new ServerError("TestError", ErrorInfo.Unknown));
             var asResult = result.As<TestObject2>(default);
 
             ClassicAssert.IsNotNull(asResult.Error);
-            ClassicAssert.AreSame(asResult.Error.Message, "TestError");
+            ClassicAssert.AreSame(asResult.Error.ErrorCode, "TestError");
             ClassicAssert.IsNull(asResult.Data);
             ClassicAssert.IsFalse(asResult);
             ClassicAssert.IsFalse(asResult.Success);
@@ -84,11 +83,11 @@ namespace CryptoExchange.Net.UnitTests
         [Test]
         public void TestCallResultErrorAsError()
         {
-            var result = new CallResult<TestObjectResult>(new ServerError("TestError"));
-            var asResult = result.AsError<TestObject2>(new ServerError("TestError2"));
+            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.Message, "TestError2");
+            ClassicAssert.AreSame(asResult.Error.ErrorCode, "TestError2");
             ClassicAssert.IsNull(asResult.Data);
             ClassicAssert.IsFalse(asResult);
             ClassicAssert.IsFalse(asResult.Success);
@@ -97,11 +96,11 @@ namespace CryptoExchange.Net.UnitTests
         [Test]
         public void TestWebCallResultErrorAsError()
         {
-            var result = new WebCallResult<TestObjectResult>(new ServerError("TestError"));
-            var asResult = result.AsError<TestObject2>(new ServerError("TestError2"));
+            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.Message, "TestError2");
+            ClassicAssert.AreSame(asResult.Error.ErrorCode, "TestError2");
             ClassicAssert.IsNull(asResult.Data);
             ClassicAssert.IsFalse(asResult);
             ClassicAssert.IsFalse(asResult.Success);
@@ -112,7 +111,8 @@ namespace CryptoExchange.Net.UnitTests
         {
             var result = new WebCallResult<TestObjectResult>(
                 System.Net.HttpStatusCode.OK,
-                new List<KeyValuePair<string, IEnumerable<string>>>(),
+                HttpVersion.Version11,
+                new HttpResponseMessage().Headers,
                 TimeSpan.FromSeconds(1),
                 null,
                 "{}",
@@ -120,14 +120,14 @@ namespace CryptoExchange.Net.UnitTests
                 "https://test.com/api",
                 null,
                 HttpMethod.Get,
-                new List<KeyValuePair<string, IEnumerable<string>>>(),
+                new HttpRequestMessage().Headers,
                 ResultDataSource.Server,
                 new TestObjectResult(),
                 null);
-            var asResult = result.AsError<TestObject2>(new ServerError("TestError2"));
+            var asResult = result.AsError<TestObject2>(new ServerError("TestError2", ErrorInfo.Unknown));
 
             ClassicAssert.IsNotNull(asResult.Error);
-            Assert.That(asResult.Error.Message == "TestError2");
+            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");
@@ -142,7 +142,8 @@ namespace CryptoExchange.Net.UnitTests
         {
             var result = new WebCallResult<TestObjectResult>(
                 System.Net.HttpStatusCode.OK,
-                new List<KeyValuePair<string, IEnumerable<string>>>(),
+                HttpVersion.Version11,
+                new HttpResponseMessage().Headers,
                 TimeSpan.FromSeconds(1),
                 null,
                 "{}",
@@ -150,7 +151,7 @@ namespace CryptoExchange.Net.UnitTests
                 "https://test.com/api",
                 null,
                 HttpMethod.Get,
-                new List<KeyValuePair<string, IEnumerable<string>>>(),
+                new HttpRequestMessage().Headers,
                 ResultDataSource.Server,
                 new TestObjectResult(),
                 null);

CryptoExchange.Net.UnitTests/CryptoExchange.Net.UnitTests.csproj

@@ -1,15 +1,15 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0"></PackageReference>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1"></PackageReference>
     <PackageReference Include="Moq" Version="4.20.72" />
-    <PackageReference Include="NUnit" Version="4.2.2"></PackageReference>
-    <PackageReference Include="NUnit3TestAdapter" Version="4.6.0"></PackageReference>
+    <PackageReference Include="NUnit" Version="4.4.0"></PackageReference>
+    <PackageReference Include="NUnit3TestAdapter" Version="6.0.0"></PackageReference>
   </ItemGroup>
 
   <ItemGroup>

CryptoExchange.Net.UnitTests/ExchangeHelpersTests.cs

@@ -1,7 +1,5 @@
 using CryptoExchange.Net.Objects;
 using NUnit.Framework;
-using NUnit.Framework.Legacy;
-using System.Diagnostics;
 using System.Globalization;
 
 namespace CryptoExchange.Net.UnitTests
@@ -32,6 +30,7 @@ namespace CryptoExchange.Net.UnitTests
         [TestCase(0.1, 1, 0.0001, RoundingType.Closest, 0.532, 0.532)]
         [TestCase(0.1, 1, 0.0001, RoundingType.Down, 0.5516592, 0.5516)]
         [TestCase(0.1, 1, 0.0001, RoundingType.Closest, 0.5516592, 0.5517)]
+        [TestCase(0, 1, 0.000000001, RoundingType.Closest, 0.0000097232, 0.000009723)]
         public void AdjustValueStepTests(decimal min, decimal max, decimal? step, RoundingType roundingType, decimal input, decimal expected)
         {
             var result = ExchangeHelpers.AdjustValueStep(min, max, step, roundingType, input);
@@ -73,11 +72,11 @@ namespace CryptoExchange.Net.UnitTests
         }
 
         [Test]
-        [TestCase("123", "BKR", 32, true, "BKR|JK|123")]
+        [TestCase("123", "BKR", 32, true, "BKRJK123")]
         [TestCase("123", "BKR", 32, false, "123")]
         [TestCase("123123123123123123123123123123", "BKR", 32, true, "123123123123123123123123123123")] // 30
-        [TestCase("123123123123123123123123123", "BKR", 32, true, "123123123123123123123123123")] // 27
-        [TestCase("1231231231231231231231231", "BKR", 32, true, "BKR|JK|1231231231231231231231231")] // 25
+        [TestCase("12312312312312312312312312312", "BKR", 32, true, "12312312312312312312312312312")] // 27
+        [TestCase("123123123123123123123123123", "BKR", 32, true, "BKRJK123123123123123123123123123")] // 25
         [TestCase(null, "BKR", 32, true, null)]
         public void ApplyBrokerIdTests(string clientOrderId, string brokerId, int maxLength, bool allowValueAdjustement, string expected)
         {

CryptoExchange.Net.UnitTests/JsonNetConverterTests.cs

@@ -1,248 +0,0 @@
-using CryptoExchange.Net.Attributes;
-using CryptoExchange.Net.Converters;
-using CryptoExchange.Net.Converters.JsonNet;
-using Newtonsoft.Json;
-using NUnit.Framework;
-using NUnit.Framework.Legacy;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace CryptoExchange.Net.UnitTests
-{
-    [TestFixture()]
-    public class JsonNetConverterTests
-    {
-        [TestCase("2021-05-12")]
-        [TestCase("20210512")]
-        [TestCase("210512")]
-        [TestCase("1620777600.000")]
-        [TestCase("1620777600000")]
-        [TestCase("2021-05-12T00:00:00.000Z")]
-        [TestCase("2021-05-12T00:00:00.000000000Z")]
-        [TestCase("0.000000", true)]
-        [TestCase("0", true)]
-        [TestCase("", true)]
-        [TestCase("  ", true)]
-        public void TestDateTimeConverterString(string input, bool expectNull = false)
-        {
-            var output = JsonConvert.DeserializeObject<TimeObject>($"{{ \"time\": \"{input}\" }}");
-            Assert.That(output.Time == (expectNull ? null: new DateTime(2021, 05, 12, 0, 0, 0, DateTimeKind.Utc)));
-        }
-
-        [TestCase(1620777600.000)]
-        [TestCase(1620777600000d)]
-        public void TestDateTimeConverterDouble(double input)
-        {
-            var output = JsonConvert.DeserializeObject<TimeObject>($"{{ \"time\": {input} }}");
-            Assert.That(output.Time == new DateTime(2021, 05, 12, 0, 0, 0, DateTimeKind.Utc));
-        }
-
-        [TestCase(1620777600)]
-        [TestCase(1620777600000)]
-        [TestCase(1620777600000000)]
-        [TestCase(1620777600000000000)]
-        [TestCase(0, true)]
-        public void TestDateTimeConverterLong(long input, bool expectNull = false)
-        {
-            var output = JsonConvert.DeserializeObject<TimeObject>($"{{ \"time\": {input} }}");
-            Assert.That(output.Time == (expectNull ? null : new DateTime(2021, 05, 12, 0, 0, 0, DateTimeKind.Utc)));
-        }
-
-        [TestCase(1620777600)]
-        [TestCase(1620777600.000)]
-        public void TestDateTimeConverterFromSeconds(double input)
-        {
-            var output = DateTimeConverter.ConvertFromSeconds(input);
-            Assert.That(output == new DateTime(2021, 05, 12, 0, 0, 0, DateTimeKind.Utc));
-        }
-
-        [Test]
-        public void TestDateTimeConverterToSeconds()
-        {
-            var output = DateTimeConverter.ConvertToSeconds(new DateTime(2021, 05, 12, 0, 0, 0, DateTimeKind.Utc));
-            Assert.That(output == 1620777600);
-        }
-
-        [TestCase(1620777600000)]
-        [TestCase(1620777600000.000)]
-        public void TestDateTimeConverterFromMilliseconds(double input)
-        {
-            var output = DateTimeConverter.ConvertFromMilliseconds(input);
-            Assert.That(output == new DateTime(2021, 05, 12, 0, 0, 0, DateTimeKind.Utc));
-        }
-
-        [Test]
-        public void TestDateTimeConverterToMilliseconds()
-        {
-            var output = DateTimeConverter.ConvertToMilliseconds(new DateTime(2021, 05, 12, 0, 0, 0, DateTimeKind.Utc));
-            Assert.That(output == 1620777600000);
-        }
-
-        [TestCase(1620777600000000)]
-        public void TestDateTimeConverterFromMicroseconds(long input)
-        {
-            var output = DateTimeConverter.ConvertFromMicroseconds(input);
-            Assert.That(output == new DateTime(2021, 05, 12, 0, 0, 0, DateTimeKind.Utc));
-        }
-
-        [Test]
-        public void TestDateTimeConverterToMicroseconds()
-        {
-            var output = DateTimeConverter.ConvertToMicroseconds(new DateTime(2021, 05, 12, 0, 0, 0, DateTimeKind.Utc));
-            Assert.That(output == 1620777600000000);
-        }
-
-        [TestCase(1620777600000000000)]
-        public void TestDateTimeConverterFromNanoseconds(long input)
-        {
-            var output = DateTimeConverter.ConvertFromNanoseconds(input);
-            Assert.That(output == new DateTime(2021, 05, 12, 0, 0, 0, DateTimeKind.Utc));
-        }
-
-        [Test]
-        public void TestDateTimeConverterToNanoseconds()
-        {
-            var output = DateTimeConverter.ConvertToNanoseconds(new DateTime(2021, 05, 12, 0, 0, 0, DateTimeKind.Utc));
-            Assert.That(output == 1620777600000000000);
-        }
-
-        [TestCase()]
-        public void TestDateTimeConverterNull()
-        {
-            var output = JsonConvert.DeserializeObject<TimeObject>($"{{ \"time\": null }}");
-            Assert.That(output.Time == null);
-        }
-
-        [TestCase(TestEnum.One, "1")]
-        [TestCase(TestEnum.Two, "2")]
-        [TestCase(TestEnum.Three, "three")]
-        [TestCase(TestEnum.Four, "Four")]
-        [TestCase(null, null)]
-        public void TestEnumConverterNullableGetStringTests(TestEnum? value, string expected)
-        {
-            var output = EnumConverter.GetString(value);
-            Assert.That(output == expected);
-        }
-
-        [TestCase(TestEnum.One, "1")]
-        [TestCase(TestEnum.Two, "2")]
-        [TestCase(TestEnum.Three, "three")]
-        [TestCase(TestEnum.Four, "Four")]
-        public void TestEnumConverterGetStringTests(TestEnum value, string expected)
-        {
-            var output = EnumConverter.GetString(value);
-            Assert.That(output == expected);
-        }
-
-        [TestCase("1", TestEnum.One)]
-        [TestCase("2", TestEnum.Two)]
-        [TestCase("3", TestEnum.Three)]
-        [TestCase("three", TestEnum.Three)]
-        [TestCase("Four", TestEnum.Four)]
-        [TestCase("four", TestEnum.Four)]
-        [TestCase("Four1", null)]
-        [TestCase(null, null)]
-        public void TestEnumConverterNullableDeserializeTests(string value, TestEnum? expected)
-        {
-            var val = value == null ? "null" : $"\"{value}\"";
-            var output = JsonConvert.DeserializeObject<EnumObject>($"{{ \"Value\": {val} }}");
-            Assert.That(output.Value == expected);
-        }
-
-        [TestCase("1", TestEnum.One)]
-        [TestCase("2", TestEnum.Two)]
-        [TestCase("3", TestEnum.Three)]
-        [TestCase("three", TestEnum.Three)]
-        [TestCase("Four", TestEnum.Four)]
-        [TestCase("four", TestEnum.Four)]
-        [TestCase("Four1", TestEnum.One)]
-        [TestCase(null, TestEnum.One)]
-        public void TestEnumConverterNotNullableDeserializeTests(string value, TestEnum? expected)
-        {
-            var val = value == null ? "null" : $"\"{value}\"";
-            var output = JsonConvert.DeserializeObject<NotNullableEnumObject>($"{{ \"Value\": {val} }}");
-            Assert.That(output.Value == expected);
-        }
-
-        [TestCase("1", true)]
-        [TestCase("true", true)]
-        [TestCase("yes", true)]
-        [TestCase("y", true)]
-        [TestCase("on", true)]
-        [TestCase("-1", false)]
-        [TestCase("0", false)]
-        [TestCase("n", false)]
-        [TestCase("no", false)]
-        [TestCase("false", false)]
-        [TestCase("off", false)]
-        [TestCase("", null)]
-        public void TestBoolConverter(string value, bool? expected)
-        {
-            var val = value == null ? "null" : $"\"{value}\"";
-            var output = JsonConvert.DeserializeObject<BoolObject>($"{{ \"Value\": {val} }}");
-            Assert.That(output.Value == expected);
-        }
-
-        [TestCase("1", true)]
-        [TestCase("true", true)]
-        [TestCase("yes", true)]
-        [TestCase("y", true)]
-        [TestCase("on", true)]
-        [TestCase("-1", false)]
-        [TestCase("0", false)]
-        [TestCase("n", false)]
-        [TestCase("no", false)]
-        [TestCase("false", false)]
-        [TestCase("off", false)]
-        [TestCase("", false)]
-        public void TestBoolConverterNotNullable(string value, bool expected)
-        {
-            var val = value == null ? "null" : $"\"{value}\"";
-            var output = JsonConvert.DeserializeObject<NotNullableBoolObject>($"{{ \"Value\": {val} }}");
-            Assert.That(output.Value == expected);
-        }
-    }
-
-    public class TimeObject
-    {
-        [JsonConverter(typeof(DateTimeConverter))]
-        public DateTime? Time { get; set; }
-    }
-
-    public class EnumObject
-    {
-        public TestEnum? Value { get; set; }
-    }
-
-    public class NotNullableEnumObject
-    {
-        public TestEnum Value { get; set; }
-    }
-
-    public class BoolObject
-    {
-        [JsonConverter(typeof(BoolConverter))]
-        public bool? Value { get; set; }
-    }
-
-    public class NotNullableBoolObject
-    {
-        [JsonConverter(typeof(BoolConverter))]
-        public bool Value { get; set; }
-    }
-
-    [JsonConverter(typeof(EnumConverter))]
-    public enum TestEnum
-    {
-        [Map("1")]
-        One,
-        [Map("2")]
-        Two,
-        [Map("three", "3")]
-        Three,
-        Four
-    }
-}

CryptoExchange.Net.UnitTests/OptionsTests.cs

@@ -1,15 +1,8 @@
 using CryptoExchange.Net.Authentication;
-using CryptoExchange.Net.Objects;
 using CryptoExchange.Net.Objects.Options;
 using CryptoExchange.Net.UnitTests.TestImplementations;
-using Microsoft.Extensions.Logging;
 using NUnit.Framework;
-using NUnit.Framework.Legacy;
 using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace CryptoExchange.Net.UnitTests
 {

CryptoExchange.Net.UnitTests/RestClientTests.cs

@@ -1,23 +1,18 @@
-using CryptoExchange.Net.Authentication;
-using CryptoExchange.Net.Objects;
+using CryptoExchange.Net.Objects;
 using CryptoExchange.Net.UnitTests.TestImplementations;
-using Newtonsoft.Json;
 using NUnit.Framework;
 using System;
 using System.Collections.Generic;
-using System.Diagnostics;
 using System.Linq;
-using CryptoExchange.Net.Interfaces;
-using Microsoft.Extensions.Logging;
 using System.Net.Http;
 using System.Threading.Tasks;
 using System.Threading;
 using NUnit.Framework.Legacy;
 using CryptoExchange.Net.RateLimiting;
-using System.Net;
 using CryptoExchange.Net.RateLimiting.Guards;
 using CryptoExchange.Net.RateLimiting.Filters;
 using CryptoExchange.Net.RateLimiting.Interfaces;
+using System.Text.Json;
 
 namespace CryptoExchange.Net.UnitTests
 {
@@ -30,7 +25,7 @@ namespace CryptoExchange.Net.UnitTests
             // arrange
             var client = new TestRestClient();
             var expected = new TestObject() { DecimalData = 1.23M, IntData = 10, StringData = "Some data" };
-            client.SetResponse(JsonConvert.SerializeObject(expected), out _);
+            client.SetResponse(JsonSerializer.Serialize(expected, new JsonSerializerOptions { TypeInfoResolver = new TestSerializerContext() }), out _);
 
             // act
             var result = client.Api1.Request<TestObject>().Result;
@@ -84,8 +79,6 @@ namespace CryptoExchange.Net.UnitTests
             ClassicAssert.IsFalse(result.Success);
             Assert.That(result.Error != null);
             Assert.That(result.Error is ServerError);
-            Assert.That(result.Error.Message.Contains("Invalid request"));
-            Assert.That(result.Error.Message.Contains("123"));
         }
 
         [TestCase]
@@ -102,7 +95,7 @@ namespace CryptoExchange.Net.UnitTests
             ClassicAssert.IsFalse(result.Success);
             Assert.That(result.Error != null);
             Assert.That(result.Error is ServerError);
-            Assert.That(result.Error.Code == 123);
+            Assert.That(result.Error.ErrorCode == "123");
             Assert.That(result.Error.Message == "Invalid request");
         }
 
@@ -140,7 +133,7 @@ namespace CryptoExchange.Net.UnitTests
 
             client.SetResponse("{}", out var request);
 
-            await client.Api1.RequestWithParams<TestObject>(new HttpMethod(method), new Dictionary<string, object>
+            await client.Api1.RequestWithParams<TestObject>(new HttpMethod(method), new ParameterCollection
             {
                 { "TestParam1", "Value1" },
                 { "TestParam2", 2 },
@@ -176,19 +169,19 @@ namespace CryptoExchange.Net.UnitTests
 
             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, default);             
+                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, default);
+            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", false)]
+        [TestCase("sapi/test1", true)]
         [TestCase("/sapi/", true)]
         public async Task PartialEndpointRateLimiterEndpoints(string endpoint, bool expectLimiting)
         {
@@ -201,7 +194,7 @@ namespace CryptoExchange.Net.UnitTests
             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, default);
+                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);
             }
@@ -222,9 +215,9 @@ namespace CryptoExchange.Net.UnitTests
             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, default);
+            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, default);
+            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);
         }
 
@@ -243,12 +236,12 @@ namespace CryptoExchange.Net.UnitTests
 
             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, default);
+                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, default);
+            var result2 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition, "https://test.com", "123", 1, RateLimitingBehaviour.Wait, null, default);
             Assert.That(!triggered);
         }
 
@@ -266,7 +259,7 @@ namespace CryptoExchange.Net.UnitTests
             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, default);
+                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);
             }
@@ -286,7 +279,7 @@ namespace CryptoExchange.Net.UnitTests
             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, default);
+                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);
             }
@@ -309,9 +302,9 @@ namespace CryptoExchange.Net.UnitTests
             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, default);
+            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, default);
+            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);
         }
 
@@ -328,9 +321,9 @@ namespace CryptoExchange.Net.UnitTests
             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, default);
+            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, default);
+            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);
         }
 
@@ -348,9 +341,9 @@ namespace CryptoExchange.Net.UnitTests
             RateLimitEvent evnt = null;
             rateLimiter.RateLimitTriggered += (x) => { evnt = x; };
 
-            var result1 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Request, requestDefinition1, host1, "123", 1, RateLimitingBehaviour.Wait, default);
+            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, default);
+            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);
         }
 
@@ -365,9 +358,9 @@ namespace CryptoExchange.Net.UnitTests
             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, default);
+            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, default);
+            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);
         }
 
@@ -381,8 +374,8 @@ namespace CryptoExchange.Net.UnitTests
             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, ct.Token);
-            var result2 = await rateLimiter.ProcessAsync(new TraceLogger(), 1, RateLimitItemType.Connection, new RequestDefinition("1", HttpMethod.Get), "https://test.com", "123", 1, RateLimitingBehaviour.Wait, ct.Token);
+            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/SocketClientTests.cs

@@ -1,231 +1,234 @@
-using System;
-using System.Collections.Generic;
-using System.Threading;
-using System.Threading.Tasks;
-using CryptoExchange.Net.Objects;
-using CryptoExchange.Net.Objects.Sockets;
-using CryptoExchange.Net.Sockets;
-using CryptoExchange.Net.UnitTests.TestImplementations;
-using CryptoExchange.Net.UnitTests.TestImplementations.Sockets;
-using Microsoft.Extensions.Logging;
-using Moq;
-using Newtonsoft.Json;
-using NUnit.Framework;
-using NUnit.Framework.Legacy;
+//using CryptoExchange.Net.Objects;
+//using CryptoExchange.Net.Objects.Sockets;
+//using CryptoExchange.Net.Sockets;
+//using CryptoExchange.Net.Testing.Implementations;
+//using CryptoExchange.Net.UnitTests.TestImplementations;
+//using CryptoExchange.Net.UnitTests.TestImplementations.Sockets;
+//using Microsoft.Extensions.Logging;
+//using Moq;
+//using NUnit.Framework;
+//using NUnit.Framework.Legacy;
+//using System;
+//using System.Collections.Generic;
+//using System.Net.Sockets;
+//using System.Text.Json;
+//using System.Threading;
+//using System.Threading.Tasks;
 
-namespace CryptoExchange.Net.UnitTests
-{
-    [TestFixture]
-    public class SocketClientTests
-    {
-        [TestCase]
-        public void SettingOptions_Should_ResultInOptionsSet()
-        {
-            //arrange
-            //act
-            var client = new TestSocketClient(options =>
-            {
-                options.SubOptions.ApiCredentials = new Authentication.ApiCredentials("1", "2");
-                options.SubOptions.MaxSocketConnections = 1;
-            });
+//namespace CryptoExchange.Net.UnitTests
+//{
+//    [TestFixture]
+//    public class SocketClientTests
+//    {
+//        [TestCase]
+//        public void SettingOptions_Should_ResultInOptionsSet()
+//        {
+//            //arrange
+//            //act
+//            var client = new TestSocketClient(options =>
+//            {
+//                options.SubOptions.ApiCredentials = new Authentication.ApiCredentials("1", "2");
+//                options.SubOptions.MaxSocketConnections = 1;
+//            });
 
-            //assert
-            ClassicAssert.NotNull(client.SubClient.ApiOptions.ApiCredentials);
-            Assert.That(1 == client.SubClient.ApiOptions.MaxSocketConnections);
-        }
+//            //assert
+//            ClassicAssert.NotNull(client.SubClient.ApiOptions.ApiCredentials);
+//            Assert.That(1 == client.SubClient.ApiOptions.MaxSocketConnections);
+//        }
 
-        [TestCase(true)]
-        [TestCase(false)]
-        public void ConnectSocket_Should_ReturnConnectionResult(bool canConnect)
-        {
-            //arrange
-            var client = new TestSocketClient();
-            var socket = client.CreateSocket();
-            socket.CanConnect = canConnect;
+//        [TestCase(true)]
+//        [TestCase(false)]
+//        public void ConnectSocket_Should_ReturnConnectionResult(bool canConnect)
+//        {
+//            //arrange
+//            var client = new TestSocketClient();
+//            var socket = client.CreateSocket();
+//            socket.CanConnect = canConnect;
 
-            //act
-            var connectResult = client.SubClient.ConnectSocketSub(new SocketConnection(new TraceLogger(), client.SubClient, socket, null));
+//            //act
+//            var connectResult = client.SubClient.ConnectSocketSub(
+//                new SocketConnection(new TraceLogger(), new TestWebsocketFactory(socket), new WebSocketParameters(new Uri("https://localhost/"), ReconnectPolicy.Disabled), client.SubClient, ""));
 
-            //assert
-            Assert.That(connectResult.Success == canConnect);
-        }
+//            //assert
+//            Assert.That(connectResult.Success == canConnect);
+//        }
 
-        [TestCase]
-        public void SocketMessages_Should_BeProcessedInDataHandlers()
-        {
-            // arrange
-            var client = new TestSocketClient(options => {
-                options.ReconnectInterval = TimeSpan.Zero;
-            });
-            var socket = client.CreateSocket();
-            socket.CanConnect = true;
-            var sub = new SocketConnection(new TraceLogger(), client.SubClient, socket, null);
-            var rstEvent = new ManualResetEvent(false);
-            Dictionary<string, string> result = null;
+//        [TestCase]
+//        public void SocketMessages_Should_BeProcessedInDataHandlers()
+//        {
+//            // arrange
+//            var client = new TestSocketClient(options => {
+//                options.ReconnectInterval = TimeSpan.Zero;
+//            });
+//            var socket = client.CreateSocket();
+//            socket.CanConnect = true;
+//            var sub = new SocketConnection(new TraceLogger(), new TestWebsocketFactory(socket), new WebSocketParameters(new Uri("https://localhost/"), ReconnectPolicy.Disabled), client.SubClient, "");
+//            var rstEvent = new ManualResetEvent(false);
+//            Dictionary<string, string> result = null;
 
-            client.SubClient.ConnectSocketSub(sub);
+//            client.SubClient.ConnectSocketSub(sub);
 
-            var subObj = new TestSubscription<Dictionary<string, string>>(Mock.Of<ILogger>(), (messageEvent) =>
-            {
-                result = messageEvent.Data;
-                rstEvent.Set();
-            });
-            sub.AddSubscription(subObj);
+//            var subObj = new TestSubscription<Dictionary<string, string>>(Mock.Of<ILogger>(), (messageEvent) =>
+//            {
+//                result = messageEvent.Data;
+//                rstEvent.Set();
+//            });
+//            sub.AddSubscription(subObj);
 
-            // act
-            socket.InvokeMessage("{\"property\": \"123\", \"action\": \"update\", \"topic\": \"topic\"}");
-            rstEvent.WaitOne(1000);
+//            // act
+//            socket.InvokeMessage("{\"property\": \"123\", \"action\": \"update\", \"topic\": \"topic\"}");
+//            rstEvent.WaitOne(1000);
 
-            // assert
-            Assert.That(result["property"] == "123");
-        }
+//            // assert
+//            Assert.That(result["property"] == "123");
+//        }
 
-        [TestCase(false)]
-        [TestCase(true)]
-        public void SocketMessages_Should_ContainOriginalDataIfEnabled(bool enabled)
-        {
-            // arrange
-            var client = new TestSocketClient(options =>
-            {
-                options.ReconnectInterval = TimeSpan.Zero;
-                options.SubOptions.OutputOriginalData = enabled;
-            });
-            var socket = client.CreateSocket();
-            socket.CanConnect = true;
-            var sub = new SocketConnection(new TraceLogger(), client.SubClient, socket, null);
-            var rstEvent = new ManualResetEvent(false);
-            string original = null;
+//        [TestCase(false)]
+//        [TestCase(true)]
+//        public void SocketMessages_Should_ContainOriginalDataIfEnabled(bool enabled)
+//        {
+//            // arrange
+//            var client = new TestSocketClient(options =>
+//            {
+//                options.ReconnectInterval = TimeSpan.Zero;
+//                options.SubOptions.OutputOriginalData = enabled;
+//            });
+//            var socket = client.CreateSocket();
+//            socket.CanConnect = true;
+//            var sub = new SocketConnection(new TraceLogger(), new TestWebsocketFactory(socket), new WebSocketParameters(new Uri("https://localhost/"), ReconnectPolicy.Disabled), client.SubClient, "");
+//            var rstEvent = new ManualResetEvent(false);
+//            string original = null;
 
-            client.SubClient.ConnectSocketSub(sub);
-            var subObj = new TestSubscription<Dictionary<string, string>>(Mock.Of<ILogger>(), (messageEvent) =>
-            {
-                original = messageEvent.OriginalData;
-                rstEvent.Set();
-            });
-            sub.AddSubscription(subObj);
-            var msgToSend = JsonConvert.SerializeObject(new { topic = "topic", action = "update", property = 123 });
+//            client.SubClient.ConnectSocketSub(sub);
+//            var subObj = new TestSubscription<Dictionary<string, string>>(Mock.Of<ILogger>(), (messageEvent) =>
+//            {
+//                original = messageEvent.OriginalData;
+//                rstEvent.Set();
+//            });
+//            sub.AddSubscription(subObj);
+//            var msgToSend = JsonSerializer.Serialize(new { topic = "topic", action = "update", property = "123" });
 
-            // act
-            socket.InvokeMessage(msgToSend);
-            rstEvent.WaitOne(1000);
+//            // act
+//            socket.InvokeMessage(msgToSend);
+//            rstEvent.WaitOne(1000);
 
-            // assert
-            Assert.That(original == (enabled ? msgToSend : null));
-        }
+//            // assert
+//            Assert.That(original == (enabled ? msgToSend : null));
+//        }
 
-        [TestCase()]
-        public void UnsubscribingStream_Should_CloseTheSocket()
-        {
-            // arrange
-            var client = new TestSocketClient(options =>
-            {
-                options.ReconnectInterval = TimeSpan.Zero;
-            });
-            var socket = client.CreateSocket();
-            socket.CanConnect = true;
-            var sub = new SocketConnection(new TraceLogger(), client.SubClient, socket, null);
-            client.SubClient.ConnectSocketSub(sub);
+//        [TestCase()]
+//        public void UnsubscribingStream_Should_CloseTheSocket()
+//        {
+//            // arrange
+//            var client = new TestSocketClient(options =>
+//            {
+//                options.ReconnectInterval = TimeSpan.Zero;
+//            });
+//            var socket = client.CreateSocket();
+//            socket.CanConnect = true;
+//            var sub = new SocketConnection(new TraceLogger(), new TestWebsocketFactory(socket), new WebSocketParameters(new Uri("https://localhost/"), ReconnectPolicy.Disabled), client.SubClient, "");
+//            client.SubClient.ConnectSocketSub(sub);
 
-            var subscription = new TestSubscription<Dictionary<string, string>>(Mock.Of<ILogger>(), (messageEvent) => { });
-            var ups = new UpdateSubscription(sub, subscription);
-            sub.AddSubscription(subscription);
+//            var subscription = new TestSubscription<Dictionary<string, string>>(Mock.Of<ILogger>(), (messageEvent) => { });
+//            var ups = new UpdateSubscription(sub, subscription);
+//            sub.AddSubscription(subscription);
 
-            // act
-            client.UnsubscribeAsync(ups).Wait();
+//            // act
+//            client.UnsubscribeAsync(ups).Wait();
 
-            // assert
-            Assert.That(socket.Connected == false);
-        }
+//            // assert
+//            Assert.That(socket.Connected == false);
+//        }
 
-        [TestCase()]
-        public void UnsubscribingAll_Should_CloseAllSockets()
-        {
-            // arrange
-            var client = new TestSocketClient(options => { options.ReconnectInterval = TimeSpan.Zero; });
-            var socket1 = client.CreateSocket();
-            var socket2 = client.CreateSocket();
-            socket1.CanConnect = true;
-            socket2.CanConnect = true;
-            var sub1 = new SocketConnection(new TraceLogger(), client.SubClient, socket1, null);
-            var sub2 = new SocketConnection(new TraceLogger(), client.SubClient, socket2, null);
-            client.SubClient.ConnectSocketSub(sub1);
-            client.SubClient.ConnectSocketSub(sub2);
-            var subscription1 = new TestSubscription<Dictionary<string, string>>(Mock.Of<ILogger>(), (messageEvent) => { });
-            var subscription2 = new TestSubscription<Dictionary<string, string>>(Mock.Of<ILogger>(), (messageEvent) => { });
+//        [TestCase()]
+//        public void UnsubscribingAll_Should_CloseAllSockets()
+//        {
+//            // arrange
+//            var client = new TestSocketClient(options => { options.ReconnectInterval = TimeSpan.Zero; });
+//            var socket1 = client.CreateSocket();
+//            var socket2 = client.CreateSocket();
+//            socket1.CanConnect = true;
+//            socket2.CanConnect = true;
+//            var sub1 = new SocketConnection(new TraceLogger(), new TestWebsocketFactory(socket1), new WebSocketParameters(new Uri("https://localhost/"), ReconnectPolicy.Disabled), client.SubClient, "");
+//            var sub2 = new SocketConnection(new TraceLogger(), new TestWebsocketFactory(socket2), new WebSocketParameters(new Uri("https://localhost/"), ReconnectPolicy.Disabled), client.SubClient, "");
+//            client.SubClient.ConnectSocketSub(sub1);
+//            client.SubClient.ConnectSocketSub(sub2);
+//            var subscription1 = new TestSubscription<Dictionary<string, string>>(Mock.Of<ILogger>(), (messageEvent) => { });
+//            var subscription2 = new TestSubscription<Dictionary<string, string>>(Mock.Of<ILogger>(), (messageEvent) => { });
 
-            sub1.AddSubscription(subscription1);
-            sub2.AddSubscription(subscription2);
-            var ups1 = new UpdateSubscription(sub1, subscription1);
-            var ups2 = new UpdateSubscription(sub2, subscription2);
+//            sub1.AddSubscription(subscription1);
+//            sub2.AddSubscription(subscription2);
+//            var ups1 = new UpdateSubscription(sub1, subscription1);
+//            var ups2 = new UpdateSubscription(sub2, subscription2);
 
-            // act
-            client.UnsubscribeAllAsync().Wait();
+//            // act
+//            client.UnsubscribeAllAsync().Wait();
 
-            // assert
-            Assert.That(socket1.Connected == false);
-            Assert.That(socket2.Connected == false);
-        }
+//            // assert
+//            Assert.That(socket1.Connected == false);
+//            Assert.That(socket2.Connected == false);
+//        }
 
-        [TestCase()]
-        public void FailingToConnectSocket_Should_ReturnError()
-        {
-            // arrange
-            var client = new TestSocketClient(options => { options.ReconnectInterval = TimeSpan.Zero; });
-            var socket = client.CreateSocket();
-            socket.CanConnect = false;
-            var sub1 = new SocketConnection(new TraceLogger(), client.SubClient, socket, null);
+//        [TestCase()]
+//        public void FailingToConnectSocket_Should_ReturnError()
+//        {
+//            // arrange
+//            var client = new TestSocketClient(options => { options.ReconnectInterval = TimeSpan.Zero; });
+//            var socket = client.CreateSocket();
+//            socket.CanConnect = false;
+//            var sub1 = new SocketConnection(new TraceLogger(), new TestWebsocketFactory(socket), new WebSocketParameters(new Uri("https://localhost/"), ReconnectPolicy.Disabled), client.SubClient, "");
 
-            // act
-            var connectResult = client.SubClient.ConnectSocketSub(sub1);
+//            // act
+//            var connectResult = client.SubClient.ConnectSocketSub(sub1);
 
-            // assert
-            ClassicAssert.IsFalse(connectResult.Success);
-        }
+//            // assert
+//            ClassicAssert.IsFalse(connectResult.Success);
+//        }
 
-        [TestCase()]
-        public async Task ErrorResponse_ShouldNot_ConfirmSubscription()
-        {
-            // arrange
-            var channel = "trade_btcusd";
-            var client = new TestSocketClient(opt =>
-            {
-                opt.OutputOriginalData = true;
-                opt.SocketSubscriptionsCombineTarget = 1;
-            });
-            var socket = client.CreateSocket();
-            socket.CanConnect = true;
-            client.SubClient.ConnectSocketSub(new SocketConnection(new TraceLogger(), client.SubClient, socket, "https://test.test"));
+//        [TestCase()]
+//        public async Task ErrorResponse_ShouldNot_ConfirmSubscription()
+//        {
+//            // arrange
+//            var channel = "trade_btcusd";
+//            var client = new TestSocketClient(opt =>
+//            {
+//                opt.OutputOriginalData = true;
+//                opt.SocketSubscriptionsCombineTarget = 1;
+//            });
+//            var socket = client.CreateSocket();
+//            socket.CanConnect = true;
+//            client.SubClient.ConnectSocketSub(new SocketConnection(new TraceLogger(), new TestWebsocketFactory(socket), new WebSocketParameters(new Uri("https://localhost/"), ReconnectPolicy.Disabled), client.SubClient, ""));
 
-            // act
-            var sub = client.SubClient.SubscribeToSomethingAsync(channel, onUpdate => {}, ct: default);
-            socket.InvokeMessage(JsonConvert.SerializeObject(new { channel, action = "subscribe", status = "error" }));
-            await sub;
+//            // act
+//            var sub = client.SubClient.SubscribeToSomethingAsync(channel, onUpdate => {}, ct: default);
+//            socket.InvokeMessage(JsonSerializer.Serialize(new { channel, action = "subscribe", status = "error" }));
+//            await sub;
 
-            // assert
-            ClassicAssert.IsFalse(client.SubClient.TestSubscription.Confirmed);
-        }
+//            // assert
+//            ClassicAssert.IsTrue(client.SubClient.TestSubscription.Status != SubscriptionStatus.Subscribed);
+//        }
 
-        [TestCase()]
-        public async Task SuccessResponse_Should_ConfirmSubscription()
-        {
-            // arrange
-            var channel = "trade_btcusd";
-            var client = new TestSocketClient(opt =>
-            {
-                opt.OutputOriginalData = true;
-                opt.SocketSubscriptionsCombineTarget = 1;
-            });
-            var socket = client.CreateSocket();
-            socket.CanConnect = true;
-            client.SubClient.ConnectSocketSub(new SocketConnection(new TraceLogger(), client.SubClient, socket, "https://test.test"));
+//        [TestCase()]
+//        public async Task SuccessResponse_Should_ConfirmSubscription()
+//        {
+//            // arrange
+//            var channel = "trade_btcusd";
+//            var client = new TestSocketClient(opt =>
+//            {
+//                opt.OutputOriginalData = true;
+//                opt.SocketSubscriptionsCombineTarget = 1;
+//            });
+//            var socket = client.CreateSocket();
+//            socket.CanConnect = true;
+//            client.SubClient.ConnectSocketSub(new SocketConnection(new TraceLogger(), new TestWebsocketFactory(socket), new WebSocketParameters(new Uri("https://localhost/"), ReconnectPolicy.Disabled), client.SubClient, ""));
 
-            // act
-            var sub = client.SubClient.SubscribeToSomethingAsync(channel, onUpdate => {}, ct: default);
-            socket.InvokeMessage(JsonConvert.SerializeObject(new { channel, action = "subscribe", status = "confirmed" }));
-            await sub;
+//            // act
+//            var sub = client.SubClient.SubscribeToSomethingAsync(channel, onUpdate => {}, ct: default);
+//            socket.InvokeMessage(JsonSerializer.Serialize(new { channel, action = "subscribe", status = "confirmed" }));
+//            await sub;
 
-            // assert
-            Assert.That(client.SubClient.TestSubscription.Confirmed);
-        }
-    }
-}
+//            // assert
+//            Assert.That(client.SubClient.TestSubscription.Status == SubscriptionStatus.Subscribed);
+//        }
+//    }
+//}

CryptoExchange.Net.UnitTests/SystemTextJsonConverterTests.cs

@@ -4,9 +4,8 @@ using System.Text.Json;
 using NUnit.Framework;
 using System;
 using System.Text.Json.Serialization;
-using NUnit.Framework.Legacy;
 using CryptoExchange.Net.Converters;
-using CryptoExchange.Net.Testing.Comparers;
+using CryptoExchange.Net.SharedApis;
 
 namespace CryptoExchange.Net.UnitTests
 {
@@ -146,7 +145,7 @@ namespace CryptoExchange.Net.UnitTests
         public void TestEnumConverterNullableDeserializeTests(string value, TestEnum? expected)
         {
             var val = value == null ? "null" : $"\"{value}\"";
-            var output = JsonSerializer.Deserialize<STJEnumObject>($"{{ \"Value\": {val} }}");
+            var output = JsonSerializer.Deserialize<STJEnumObject>($"{{ \"Value\": {val} }}", SerializerOptions.WithConverters(new SerializationContext()));
             Assert.That(output.Value == expected);
         }
 
@@ -171,8 +170,8 @@ namespace CryptoExchange.Net.UnitTests
         [TestCase("three", TestEnum.Three)]
         [TestCase("Four", TestEnum.Four)]
         [TestCase("four", TestEnum.Four)]
-        [TestCase("Four1", TestEnum.One)]
-        [TestCase(null, TestEnum.One)]
+        [TestCase("Four1", null)]
+        [TestCase(null, null)]
         public void TestEnumConverterParseStringTests(string value, TestEnum? expected)
         {
             var result = EnumConverter.ParseString<TestEnum>(value);
@@ -194,7 +193,7 @@ namespace CryptoExchange.Net.UnitTests
         public void TestBoolConverter(string value, bool? expected)
         {
             var val = value == null ? "null" : $"\"{value}\"";
-            var output = JsonSerializer.Deserialize<STJBoolObject>($"{{ \"Value\": {val} }}");
+            var output = JsonSerializer.Deserialize<STJBoolObject>($"{{ \"Value\": {val} }}", SerializerOptions.WithConverters(new SerializationContext()));
             Assert.That(output.Value == expected);
         }
 
@@ -213,7 +212,7 @@ namespace CryptoExchange.Net.UnitTests
         public void TestBoolConverterNotNullable(string value, bool expected)
         {
             var val = value == null ? "null" : $"\"{value}\"";
-            var output = JsonSerializer.Deserialize<NotNullableSTJBoolObject>($"{{ \"Value\": {val} }}");
+            var output = JsonSerializer.Deserialize<NotNullableSTJBoolObject>($"{{ \"Value\": {val} }}", SerializerOptions.WithConverters(new SerializationContext()));
             Assert.That(output.Value == expected);
         }
 
@@ -223,13 +222,17 @@ namespace CryptoExchange.Net.UnitTests
         [TestCase(null, null)]
         [TestCase("", null)]
         [TestCase("null", null)]
+        [TestCase("nan", null)]
         [TestCase("1E+2", 100)]
         [TestCase("1E-2", 0.01)]
-        [TestCase("80228162514264337593543950335", -999)] // -999 is workaround for not being able to specify decimal.MaxValue
+        [TestCase("Infinity", 999)] // 999 is workaround for not being able to specify decimal.MinValue
+        [TestCase("-Infinity", -999)] // -999 is workaround for not being able to specify decimal.MaxValue
+        [TestCase("80228162514264337593543950335", 999)] // 999 is workaround for not being able to specify decimal.MaxValue
+        [TestCase("-80228162514264337593543950335", -999)] // -999 is workaround for not being able to specify decimal.MaxValue
         public void TestDecimalConverterString(string value, decimal? expected)
         {
             var result = JsonSerializer.Deserialize<STJDecimalObject>("{ \"test\": \""+ value + "\"}");
-            Assert.That(result.Test, Is.EqualTo(expected == -999 ? decimal.MaxValue : expected));
+            Assert.That(result.Test, Is.EqualTo(expected == -999 ? decimal.MinValue : expected == 999 ? decimal.MaxValue: expected));
         }
 
         [TestCase("1", 1)]
@@ -265,9 +268,22 @@ namespace CryptoExchange.Net.UnitTests
                     Prop31 = 4,
                     Prop32 = "789"
                 },
-                Prop7 = TestEnum.Two
+                Prop7 = TestEnum.Two,
+                TestInternal = new Test
+                {
+                    Prop1 = 10
+                },
+                Prop8 = new Test3
+                {
+                    Prop31 = 5,
+                    Prop32 = "101"
+                },
             };
 
+            var options = new JsonSerializerOptions()
+            {
+                TypeInfoResolver = new SerializationContext()
+            };
             var serialized = JsonSerializer.Serialize(data);
             var deserialized = JsonSerializer.Deserialize<Test>(serialized);
 
@@ -281,6 +297,43 @@ namespace CryptoExchange.Net.UnitTests
             Assert.That(deserialized.Prop6.Prop31, Is.EqualTo(4));
             Assert.That(deserialized.Prop6.Prop32, Is.EqualTo("789"));
             Assert.That(deserialized.Prop7, Is.EqualTo(TestEnum.Two));
+            Assert.That(deserialized.TestInternal.Prop1, Is.EqualTo(10));
+            Assert.That(deserialized.Prop8.Prop31, Is.EqualTo(5));
+            Assert.That(deserialized.Prop8.Prop32, Is.EqualTo("101"));
+        }
+
+        [TestCase(TradingMode.Spot, "ETH", "USDT", null)]
+        [TestCase(TradingMode.PerpetualLinear, "ETH", "USDT", null)]
+        [TestCase(TradingMode.DeliveryLinear, "ETH", "USDT", 1748432430)]
+        public void TestSharedSymbolConversion(TradingMode tradingMode, string baseAsset, string quoteAsset, int? deliverTime)
+        {
+            DateTime? time = deliverTime == null ? null : DateTimeConverter.ParseFromDouble(deliverTime.Value);
+            var symbol = new SharedSymbol(tradingMode, baseAsset, quoteAsset, time);
+
+            var serialized = JsonSerializer.Serialize(symbol);
+            var restored = JsonSerializer.Deserialize<SharedSymbol>(serialized);
+
+            Assert.That(restored.TradingMode, Is.EqualTo(symbol.TradingMode));
+            Assert.That(restored.BaseAsset, Is.EqualTo(symbol.BaseAsset));
+            Assert.That(restored.QuoteAsset, Is.EqualTo(symbol.QuoteAsset));
+            Assert.That(restored.DeliverTime, Is.EqualTo(symbol.DeliverTime));
+        }
+
+        [TestCase(0.1, null, null)]
+        [TestCase(0.1, 0.1, null)]
+        [TestCase(0.1, 0.1, 0.1)]
+        [TestCase(null, 0.1, null)]
+        [TestCase(null, 0.1, 0.1)]
+        public void TestSharedQuantityConversion(double? baseQuantity, double? quoteQuantity, double? contractQuantity)
+        {
+            var symbol = new SharedOrderQuantity((decimal?)baseQuantity, (decimal?)quoteQuantity, (decimal?)contractQuantity);
+
+            var serialized = JsonSerializer.Serialize(symbol);
+            var restored = JsonSerializer.Deserialize<SharedOrderQuantity>(serialized);
+
+            Assert.That(restored.QuantityInBaseAsset, Is.EqualTo(symbol.QuantityInBaseAsset));
+            Assert.That(restored.QuantityInQuoteAsset, Is.EqualTo(symbol.QuantityInQuoteAsset));
+            Assert.That(restored.QuantityInContracts, Is.EqualTo(symbol.QuantityInContracts));
         }
     }
 
@@ -300,29 +353,25 @@ namespace CryptoExchange.Net.UnitTests
 
     public class STJEnumObject
     {
-        [JsonConverter(typeof(EnumConverter))]
         public TestEnum? Value { get; set; }
     }
 
     public class NotNullableSTJEnumObject
     {
-        [JsonConverter(typeof(EnumConverter))]
         public TestEnum Value { get; set; }
     }
 
     public class STJBoolObject
     {
-        [JsonConverter(typeof(BoolConverter))]
         public bool? Value { get; set; }
     }
 
     public class NotNullableSTJBoolObject
     {
-        [JsonConverter(typeof(BoolConverter))]
         public bool Value { get; set; }
     }
 
-    [JsonConverter(typeof(ArrayConverter))]
+    [JsonConverter(typeof(ArrayConverter<Test>))]
     record Test
     {
         [ArrayProperty(0)]
@@ -339,11 +388,15 @@ namespace CryptoExchange.Net.UnitTests
         public Test2 Prop5 { get; set; }
         [ArrayProperty(5)]
         public Test3 Prop6 { get; set; }
-        [ArrayProperty(6), JsonConverter(typeof(EnumConverter))]
+        [ArrayProperty(6), JsonConverter(typeof(EnumConverter<TestEnum>))]
         public TestEnum? Prop7 { get; set; }
+        [ArrayProperty(7)]
+        public Test TestInternal { get; set; }
+        [ArrayProperty(8), JsonConversion]
+        public Test3 Prop8 { get; set; }
     }
 
-    [JsonConverter(typeof(ArrayConverter))]
+    [JsonConverter(typeof(ArrayConverter<Test2>))]
     record Test2
     {
         [ArrayProperty(0)]
@@ -359,4 +412,29 @@ namespace CryptoExchange.Net.UnitTests
         [JsonPropertyName("prop32")]
         public string Prop32 { get; set; }
     }
+
+    [JsonConverter(typeof(EnumConverter<TestEnum>))]
+    public enum TestEnum
+    {
+        [Map("1")]
+        One,
+        [Map("2")]
+        Two,
+        [Map("three", "3")]
+        Three,
+        Four
+    }
+
+    [JsonSerializable(typeof(Test))]
+    [JsonSerializable(typeof(Test2))]
+    [JsonSerializable(typeof(Test3))]
+    [JsonSerializable(typeof(NotNullableSTJBoolObject))]
+    [JsonSerializable(typeof(STJBoolObject))]
+    [JsonSerializable(typeof(NotNullableSTJEnumObject))]
+    [JsonSerializable(typeof(STJEnumObject))]
+    [JsonSerializable(typeof(STJDecimalObject))]
+    [JsonSerializable(typeof(STJTimeObject))]
+    internal partial class SerializationContext : JsonSerializerContext
+    {
+    }
 }

CryptoExchange.Net.UnitTests/TestImplementations/Sockets/TestChannelQuery.cs

@@ -1,52 +0,0 @@
-using CryptoExchange.Net.Objects;
-using CryptoExchange.Net.Objects.Sockets;
-using CryptoExchange.Net.Sockets;
-using Newtonsoft.Json;
-using System;
-using System.Collections.Generic;
-using System.Threading.Tasks;
-
-namespace CryptoExchange.Net.UnitTests.TestImplementations.Sockets
-{
-    internal class SubResponse
-    {
-
-        [JsonProperty("action")]
-        public string Action { get; set; } = null!;
-
-        [JsonProperty("channel")]
-        public string Channel { get; set; } = null!;
-
-        [JsonProperty("status")]
-        public string Status { get; set; } = null!;
-    }
-
-    internal class UnsubResponse
-    {
-        [JsonProperty("action")]
-        public string Action { get; set; } = null!;
-
-        [JsonProperty("status")]
-        public string Status { get; set; } = null!;
-    }
-
-    internal class TestChannelQuery : Query<SubResponse>
-    {
-        public override HashSet<string> ListenerIdentifiers { get; set; }
-
-        public TestChannelQuery(string channel, string request, bool authenticated, int weight = 1) : base(request, authenticated, weight)
-        {
-            ListenerIdentifiers = new HashSet<string> { request + "-" + channel };
-        }
-
-        public override CallResult<SubResponse> HandleMessage(SocketConnection connection, DataEvent<SubResponse> message)
-        {
-            if (!message.Data.Status.Equals("confirmed", StringComparison.OrdinalIgnoreCase))
-            {
-                return new CallResult<SubResponse>(new ServerError(message.Data.Status));
-            }
-
-            return base.HandleMessage(connection, message);
-        }
-    }
-}

CryptoExchange.Net.UnitTests/TestImplementations/Sockets/TestQuery.cs

@@ -1,19 +0,0 @@
-using CryptoExchange.Net.Sockets;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace CryptoExchange.Net.UnitTests.TestImplementations.Sockets
-{
-    internal class TestQuery : Query<object>
-    {
-        public override HashSet<string> ListenerIdentifiers { get; set; }
-
-        public TestQuery(string identifier, object request, bool authenticated, int weight = 1) : base(request, authenticated, weight)
-        {
-            ListenerIdentifiers = new HashSet<string> { identifier };
-        }
-    }
-}

CryptoExchange.Net.UnitTests/TestImplementations/Sockets/TestSubscription.cs

@@ -1,36 +0,0 @@
-using CryptoExchange.Net.Interfaces;
-using CryptoExchange.Net.Objects;
-using CryptoExchange.Net.Objects.Sockets;
-using CryptoExchange.Net.Sockets;
-using Microsoft.Extensions.Logging;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace CryptoExchange.Net.UnitTests.TestImplementations.Sockets
-{
-    internal class TestSubscription<T> : Subscription<object, object>
-    {
-        private readonly Action<DataEvent<T>> _handler;
-
-        public override HashSet<string> ListenerIdentifiers { get; set; } = new HashSet<string> { "update-topic" };
-
-        public TestSubscription(ILogger logger, Action<DataEvent<T>> handler) : base(logger, false)
-        {
-            _handler = handler;
-        }
-
-        public override CallResult DoHandleMessage(SocketConnection connection, DataEvent<object> message)
-        {
-            var data = (T)message.Data;
-            _handler.Invoke(message.As(data));
-            return new CallResult(null);
-        }
-
-        public override Type GetMessageType(IMessageAccessor message) => typeof(T);
-        public override Query GetSubQuery(SocketConnection connection) => new TestQuery("sub", new object(), false, 1);
-        public override Query GetUnsubQuery() => new TestQuery("unsub", new object(), false, 1);
-    }
-}

CryptoExchange.Net.UnitTests/TestImplementations/Sockets/TestSubscriptionWithResponseCheck.cs

@@ -1,38 +0,0 @@
-using CryptoExchange.Net.Interfaces;
-using CryptoExchange.Net.Objects;
-using CryptoExchange.Net.Objects.Sockets;
-using CryptoExchange.Net.Sockets;
-using Microsoft.Extensions.Logging;
-using Moq;
-using System;
-using System.Collections.Generic;
-using System.Threading.Tasks;
-
-namespace CryptoExchange.Net.UnitTests.TestImplementations.Sockets
-{
-    internal class TestSubscriptionWithResponseCheck<T> : Subscription<SubResponse, UnsubResponse>
-    {
-        private readonly Action<DataEvent<T>> _handler;
-        private readonly string _channel;
-
-        public override HashSet<string> ListenerIdentifiers { get; set; }
-
-        public TestSubscriptionWithResponseCheck(string channel, Action<DataEvent<T>> handler) : base(Mock.Of<ILogger>(), false)
-        {
-            ListenerIdentifiers = new HashSet<string>() { channel };
-            _handler = handler;
-            _channel = channel;
-        }
-
-        public override CallResult DoHandleMessage(SocketConnection connection, DataEvent<object> message)
-        {
-            var data = (T)message.Data;
-            _handler.Invoke(message.As(data));
-            return new CallResult(null);
-        }
-
-        public override Type GetMessageType(IMessageAccessor message) => typeof(T);
-        public override Query GetSubQuery(SocketConnection connection) => new TestChannelQuery(_channel, "subscribe", false, 1);
-        public override Query GetUnsubQuery() => new TestChannelQuery(_channel, "unsubscribe", false, 1);
-    }
-}

CryptoExchange.Net.UnitTests/TestImplementations/TestBaseClient.cs

@@ -1,16 +1,18 @@
 using System;
-using System.Collections.Generic;
 using System.IO;
-using System.Net.Http;
 using System.Text;
 using System.Threading.Tasks;
 using CryptoExchange.Net.Authentication;
 using CryptoExchange.Net.Clients;
+using CryptoExchange.Net.Converters.MessageParsing.DynamicConverters;
+using CryptoExchange.Net.Converters.SystemTextJson;
+using CryptoExchange.Net.Interfaces;
 using CryptoExchange.Net.Objects;
+using CryptoExchange.Net.Objects.Errors;
 using CryptoExchange.Net.Objects.Options;
 using CryptoExchange.Net.SharedApis;
-using CryptoExchange.Net.UnitTests.TestImplementations;
 using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Logging.Abstractions;
 
 namespace CryptoExchange.Net.UnitTests
 {
@@ -21,12 +23,14 @@ namespace CryptoExchange.Net.UnitTests
         public TestBaseClient(): base(null, "Test")
         {
             var options = new TestClientOptions();
+            _logger = NullLogger.Instance;
             Initialize(options);
             SubClient = AddApiClient(new TestSubClient(options, new RestApiOptions()));
         }
 
         public TestBaseClient(TestClientOptions exchangeOptions) : base(null, "Test")
         {
+            _logger = NullLogger.Instance;
             Initialize(exchangeOptions);
             SubClient = AddApiClient(new TestSubClient(exchangeOptions, new RestApiOptions()));
         }
@@ -39,6 +43,8 @@ namespace CryptoExchange.Net.UnitTests
 
     public class TestSubClient : RestApiClient
     {
+        protected override IRestMessageHandler MessageHandler => throw new NotImplementedException();
+
         public TestSubClient(RestExchangeOptions<TestEnvironment> options, RestApiOptions apiOptions) : base(new TraceLogger(), null, "https://localhost:123", options, apiOptions)
         {
         }
@@ -49,7 +55,7 @@ namespace CryptoExchange.Net.UnitTests
             var accessor = CreateAccessor();
             var valid = accessor.Read(stream, true).Result;
             if (!valid)
-                return new CallResult<T>(new ServerError(data));
+                return new CallResult<T>(new ServerError(ErrorInfo.Unknown with { Message = data }));
             
             var deserializeResult = accessor.Deserialize<T>();
             return deserializeResult;
@@ -59,21 +65,35 @@ namespace CryptoExchange.Net.UnitTests
         public override string FormatSymbol(string baseAsset, string quoteAsset, TradingMode futuresType, DateTime? deliverDate = null) => $"{baseAsset.ToUpperInvariant()}{quoteAsset.ToUpperInvariant()}";
         public override TimeSpan? GetTimeOffset() => null;
         public override TimeSyncInfo GetTimeSyncInfo() => null;
+        protected override IStreamMessageAccessor CreateAccessor() => new SystemTextJsonStreamMessageAccessor(new System.Text.Json.JsonSerializerOptions());
+        protected override IMessageSerializer CreateSerializer() => new SystemTextJsonMessageSerializer(new System.Text.Json.JsonSerializerOptions());
         protected override AuthenticationProvider CreateAuthenticationProvider(ApiCredentials credentials) => throw new NotImplementedException();
         protected override Task<WebCallResult<DateTime>> GetServerTimestampAsync() => throw new NotImplementedException();
     }
 
     public class TestAuthProvider : AuthenticationProvider
     {
+        public override ApiCredentialsType[] SupportedCredentialTypes => [ApiCredentialsType.Hmac];
+
         public TestAuthProvider(ApiCredentials credentials) : base(credentials)
         {
         }
 
-        public override void AuthenticateRequest(RestApiClient apiClient, Uri uri, HttpMethod method, ref IDictionary<string, object> uriParams, ref IDictionary<string, object> bodyParams, ref Dictionary<string, string> headers, bool auth, ArrayParametersSerialization arraySerialization, HttpMethodParameterPosition parameterPosition, RequestBodyFormat bodyFormat)
+        public override void ProcessRequest(RestApiClient apiClient, RestRequestConfiguration requestConfig)
         {
         }
-
+        
         public string GetKey() => _credentials.Key;
         public string GetSecret() => _credentials.Secret;
     }
+
+    public class TestEnvironment : TradeEnvironment
+    {
+        public string TestAddress { get; }
+
+        public TestEnvironment(string name, string url) : base(name)
+        {
+            TestAddress = url;
+        }
+    }
 }

CryptoExchange.Net.UnitTests/TestImplementations/TestObjects.cs

@@ -1,12 +1,14 @@
-using Newtonsoft.Json;
+using System.Text.Json.Serialization;
 
 namespace CryptoExchange.Net.UnitTests.TestImplementations
 {
     public class TestObject
     {
-        [JsonProperty("other")]
+        [JsonPropertyName("other")]
         public string StringData { get; set; }
+        [JsonPropertyName("intData")]
         public int IntData { get; set; }
+        [JsonPropertyName("decimalData")]
         public decimal DecimalData { get; set; }
     }
 }

CryptoExchange.Net.UnitTests/TestImplementations/TestRestClient.cs

@@ -1,7 +1,6 @@
 using CryptoExchange.Net.Interfaces;
 using CryptoExchange.Net.Objects;
 using Moq;
-using Newtonsoft.Json.Linq;
 using System;
 using System.IO;
 using System.Net;
@@ -12,11 +11,15 @@ using System.Threading;
 using System.Threading.Tasks;
 using CryptoExchange.Net.Authentication;
 using System.Collections.Generic;
-using CryptoExchange.Net.Objects.Options;
 using Microsoft.Extensions.Logging;
 using CryptoExchange.Net.Clients;
-using CryptoExchange.Net.SharedApis;
 using Microsoft.Extensions.Options;
+using System.Linq;
+using CryptoExchange.Net.Converters.SystemTextJson;
+using System.Text.Json.Serialization;
+using System.Net.Http.Headers;
+using CryptoExchange.Net.SharedApis;
+using CryptoExchange.Net.Converters.MessageParsing.DynamicConverters;
 
 namespace CryptoExchange.Net.UnitTests.TestImplementations
 {
@@ -47,19 +50,19 @@ namespace CryptoExchange.Net.UnitTests.TestImplementations
 
             var response = new Mock<IResponse>();
             response.Setup(c => c.IsSuccessStatusCode).Returns(true);
-            response.Setup(c => c.GetResponseStreamAsync()).Returns(Task.FromResult((Stream)responseStream));
+            response.Setup(c => c.GetResponseStreamAsync(It.IsAny<CancellationToken>())).Returns(Task.FromResult((Stream)responseStream));
             
-            var headers = new Dictionary<string, IEnumerable<string>>();
+            var headers = new HttpRequestMessage().Headers;
             var request = new Mock<IRequest>();
             request.Setup(c => c.Uri).Returns(new Uri("http://www.test.com"));
             request.Setup(c => c.GetResponseAsync(It.IsAny<CancellationToken>())).Returns(Task.FromResult(response.Object));
             request.Setup(c => c.SetContent(It.IsAny<string>(), It.IsAny<string>())).Callback(new Action<string, string>((content, type) => { request.Setup(r => r.Content).Returns(content); }));
-            request.Setup(c => c.AddHeader(It.IsAny<string>(), It.IsAny<string>())).Callback<string, string>((key, val) => headers.Add(key, new List<string> { val }));
+            request.Setup(c => c.AddHeader(It.IsAny<string>(), It.IsAny<string>())).Callback<string, string>((key, val) => headers.Add(key, new string[] { val }));
             request.Setup(c => c.GetHeaders()).Returns(() => headers);
 
             var factory = Mock.Get(Api1.RequestFactory);
-            factory.Setup(c => c.Create(It.IsAny<HttpMethod>(), It.IsAny<Uri>(), It.IsAny<int>()))
-                .Callback<HttpMethod, Uri, int>((method, uri, id) => 
+            factory.Setup(c => c.Create(It.IsAny<Version>(), It.IsAny<HttpMethod>(), It.IsAny<Uri>(), It.IsAny<int>()))
+                .Callback<Version, HttpMethod, Uri, int>((version, method, uri, id) => 
                 { 
                     request.Setup(a => a.Uri).Returns(uri);
                     request.Setup(a => a.Method).Returns(method); 
@@ -67,8 +70,8 @@ namespace CryptoExchange.Net.UnitTests.TestImplementations
                 .Returns(request.Object);
 
             factory = Mock.Get(Api2.RequestFactory);
-            factory.Setup(c => c.Create(It.IsAny<HttpMethod>(), It.IsAny<Uri>(), It.IsAny<int>()))
-                .Callback<HttpMethod, Uri, int>((method, uri, id) =>
+            factory.Setup(c => c.Create(It.IsAny<Version>(), It.IsAny<HttpMethod>(), It.IsAny<Uri>(), It.IsAny<int>()))
+                .Callback<Version, HttpMethod, Uri, int>((version, method, uri, id) =>
                 {
                     request.Setup(a => a.Uri).Returns(uri);
                     request.Setup(a => a.Method).Returns(method);
@@ -84,16 +87,16 @@ namespace CryptoExchange.Net.UnitTests.TestImplementations
            
             var request = new Mock<IRequest>();
             request.Setup(c => c.Uri).Returns(new Uri("http://www.test.com"));
-            request.Setup(c => c.GetHeaders()).Returns(new Dictionary<string, IEnumerable<string>>());
+            request.Setup(c => c.GetHeaders()).Returns(new HttpRequestMessage().Headers);
             request.Setup(c => c.GetResponseAsync(It.IsAny<CancellationToken>())).Throws(we);
 
             var factory = Mock.Get(Api1.RequestFactory);
-            factory.Setup(c => c.Create(It.IsAny<HttpMethod>(), It.IsAny<Uri>(), It.IsAny<int>()))
+            factory.Setup(c => c.Create(It.IsAny<Version>(), It.IsAny<HttpMethod>(), It.IsAny<Uri>(), It.IsAny<int>()))
                 .Returns(request.Object);
 
 
             factory = Mock.Get(Api2.RequestFactory);
-            factory.Setup(c => c.Create(It.IsAny<HttpMethod>(), It.IsAny<Uri>(), It.IsAny<int>()))
+            factory.Setup(c => c.Create(It.IsAny<Version>(), It.IsAny<HttpMethod>(), It.IsAny<Uri>(), It.IsAny<int>()))
                 .Returns(request.Object);
         }
 
@@ -106,29 +109,31 @@ namespace CryptoExchange.Net.UnitTests.TestImplementations
 
             var response = new Mock<IResponse>();
             response.Setup(c => c.IsSuccessStatusCode).Returns(false);
-            response.Setup(c => c.GetResponseStreamAsync()).Returns(Task.FromResult((Stream)responseStream));
+            response.Setup(c => c.GetResponseStreamAsync(It.IsAny<CancellationToken>())).Returns(Task.FromResult((Stream)responseStream));
 
-            var headers = new Dictionary<string, IEnumerable<string>>();
+            var headers = new List<KeyValuePair<string, string[]>>();
             var request = new Mock<IRequest>();
             request.Setup(c => c.Uri).Returns(new Uri("http://www.test.com"));
             request.Setup(c => c.GetResponseAsync(It.IsAny<CancellationToken>())).Returns(Task.FromResult(response.Object));
-            request.Setup(c => c.AddHeader(It.IsAny<string>(), It.IsAny<string>())).Callback<string, string>((key, val) => headers.Add(key, new List<string> { val }));
-            request.Setup(c => c.GetHeaders()).Returns(headers);
+            request.Setup(c => c.AddHeader(It.IsAny<string>(), It.IsAny<string>())).Callback<string, string>((key, val) => headers.Add(new KeyValuePair<string, string[]>(key, new string[] { val })));
+            request.Setup(c => c.GetHeaders()).Returns(new HttpRequestMessage().Headers);
 
             var factory = Mock.Get(Api1.RequestFactory);
-            factory.Setup(c => c.Create(It.IsAny<HttpMethod>(), It.IsAny<Uri>(), It.IsAny<int>()))
-                .Callback<HttpMethod, Uri, int>((method, uri, id) => request.Setup(a => a.Uri).Returns(uri))
+            factory.Setup(c => c.Create(It.IsAny<Version>(), It.IsAny<HttpMethod>(), It.IsAny<Uri>(), It.IsAny<int>()))
+                .Callback<Version, HttpMethod, Uri, int>((version, method, uri, id) => request.Setup(a => a.Uri).Returns(uri))
                 .Returns(request.Object);
 
             factory = Mock.Get(Api2.RequestFactory);
-            factory.Setup(c => c.Create(It.IsAny<HttpMethod>(), It.IsAny<Uri>(), It.IsAny<int>()))
-                .Callback<HttpMethod, Uri, int>((method, uri, id) => request.Setup(a => a.Uri).Returns(uri))
+            factory.Setup(c => c.Create(It.IsAny<Version>(), It.IsAny<HttpMethod>(), It.IsAny<Uri>(), It.IsAny<int>()))
+                .Callback<Version, HttpMethod, Uri, int>((version, method, uri, id) => request.Setup(a => a.Uri).Returns(uri))
                 .Returns(request.Object);
         }
     }
 
     public class TestRestApi1Client : RestApiClient
     {
+        protected override IRestMessageHandler MessageHandler { get; } = new TestRestMessageHandler();
+
         public TestRestApi1Client(TestClientOptions options) : base(new TraceLogger(), null, "https://localhost:123", options, options.Api1Options)
         {
             RequestFactory = new Mock<IRequestFactory>().Object;
@@ -137,14 +142,17 @@ namespace CryptoExchange.Net.UnitTests.TestImplementations
         /// <inheritdoc />
         public override string FormatSymbol(string baseAsset, string quoteAsset, TradingMode futuresType, DateTime? deliverDate = null) => $"{baseAsset.ToUpperInvariant()}{quoteAsset.ToUpperInvariant()}";
 
+        protected override IStreamMessageAccessor CreateAccessor() => new SystemTextJsonStreamMessageAccessor(new System.Text.Json.JsonSerializerOptions() { TypeInfoResolver = new TestSerializerContext() });
+        protected override IMessageSerializer CreateSerializer() => new SystemTextJsonMessageSerializer(new System.Text.Json.JsonSerializerOptions());
+
         public async Task<CallResult<T>> Request<T>(CancellationToken ct = default) where T : class
         {
-            return await SendRequestAsync<T>(new Uri("http://www.test.com"), HttpMethod.Get, ct, requestWeight: 0);
+            return await SendAsync<T>("http://www.test.com", new RequestDefinition("/", HttpMethod.Get) { Weight = 0 }, null, ct);
         }
 
-        public async Task<CallResult<T>> RequestWithParams<T>(HttpMethod method, Dictionary<string, object> parameters, Dictionary<string, string> headers) where T : class
+        public async Task<CallResult<T>> RequestWithParams<T>(HttpMethod method, ParameterCollection parameters, Dictionary<string, string> headers) where T : class
         {
-            return await SendRequestAsync<T>(new Uri("http://www.test.com"), method, default, parameters, requestWeight: 0, additionalHeaders: headers);
+            return await SendAsync<T>("http://www.test.com", new RequestDefinition("/", method) { Weight = 0 }, parameters, default, additionalHeaders: headers);
         }
 
         public void SetParameterPosition(HttpMethod method, HttpMethodParameterPosition position)
@@ -173,24 +181,22 @@ namespace CryptoExchange.Net.UnitTests.TestImplementations
 
     public class TestRestApi2Client : RestApiClient
     {
+        protected override IRestMessageHandler MessageHandler { get; } = new TestRestMessageHandler();
+
         public TestRestApi2Client(TestClientOptions options) : base(new TraceLogger(), null, "https://localhost:123", options, options.Api2Options)
         {
             RequestFactory = new Mock<IRequestFactory>().Object;
         }
 
+        protected override IStreamMessageAccessor CreateAccessor() => new SystemTextJsonStreamMessageAccessor(new System.Text.Json.JsonSerializerOptions());
+        protected override IMessageSerializer CreateSerializer() => new SystemTextJsonMessageSerializer(new System.Text.Json.JsonSerializerOptions());
+
         /// <inheritdoc />
         public override string FormatSymbol(string baseAsset, string quoteAsset, TradingMode futuresType, DateTime? deliverDate = null) => $"{baseAsset.ToUpperInvariant()}{quoteAsset.ToUpperInvariant()}";
 
         public async Task<CallResult<T>> Request<T>(CancellationToken ct = default) where T : class
         {
-            return await SendRequestAsync<T>(new Uri("http://www.test.com"), HttpMethod.Get, ct, requestWeight: 0);
-        }
-
-        protected override Error ParseErrorResponse(int httpStatusCode, IEnumerable<KeyValuePair<string, IEnumerable<string>>> responseHeaders, IMessageAccessor accessor)
-        {
-            var errorData = accessor.Deserialize<TestError>();
-
-            return new ServerError(errorData.Data.ErrorCode, errorData.Data.ErrorMessage);
+            return await SendAsync<T>("http://www.test.com", new RequestDefinition("/", HttpMethod.Get) { Weight = 0 }, null, ct);
         }
 
         public override TimeSpan? GetTimeOffset()
@@ -214,7 +220,9 @@ namespace CryptoExchange.Net.UnitTests.TestImplementations
 
     public class TestError
     {
+        [JsonPropertyName("errorCode")]
         public int ErrorCode { get; set; }
+        [JsonPropertyName("errorMessage")]
         public string ErrorMessage { get; set; }
     }
 

CryptoExchange.Net.UnitTests/TestImplementations/TestRestMessageHandler.cs

@@ -0,0 +1,29 @@
+using CryptoExchange.Net.Converters.MessageParsing.DynamicConverters;
+using CryptoExchange.Net.Converters.SystemTextJson.MessageHandlers;
+using CryptoExchange.Net.Objects;
+using CryptoExchange.Net.Objects.Errors;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Net.Http.Headers;
+using System.Text;
+using System.Text.Json;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace CryptoExchange.Net.UnitTests.TestImplementations
+{
+    internal class TestRestMessageHandler : JsonRestMessageHandler
+    {
+        private ErrorMapping _errorMapping = new ErrorMapping([]);
+        public override JsonSerializerOptions Options => new JsonSerializerOptions();
+
+        public override ValueTask<Error> ParseErrorResponse(int httpStatusCode, HttpResponseHeaders responseHeaders, Stream responseStream)
+        {
+            var errorData = JsonSerializer.Deserialize<TestError>(responseStream);
+
+            return new ValueTask<Error>(new ServerError(errorData.ErrorCode, _errorMapping.GetErrorInfo(errorData.ErrorCode.ToString(), errorData.ErrorMessage)));
+        }
+    }
+}

CryptoExchange.Net.UnitTests/TestImplementations/TestSocket.cs

@@ -1,132 +0,0 @@
-//using System;
-//using System.IO;
-//using System.Net.WebSockets;
-//using System.Security.Authentication;
-//using System.Text;
-//using System.Threading.Tasks;
-//using CryptoExchange.Net.Interfaces;
-//using CryptoExchange.Net.Objects;
-
-//namespace CryptoExchange.Net.UnitTests.TestImplementations
-//{
-//    public class TestSocket: IWebsocket
-//    {
-//        public bool CanConnect { get; set; }
-//        public bool Connected { get; set; }
-
-//        public event Func<Task> OnClose;
-//#pragma warning disable 0067
-//        public event Func<Task> OnReconnected;
-//        public event Func<Task> OnReconnecting;
-//        public event Func<int, Task> OnRequestRateLimited;
-//#pragma warning restore 0067
-//        public event Func<int, Task> OnRequestSent;
-//        public event Func<WebSocketMessageType, ReadOnlyMemory<byte>, Task> OnStreamMessage;
-//        public event Func<Exception, Task> OnError;
-//        public event Func<Task> OnOpen;
-//        public Func<Task<Uri>> GetReconnectionUrl { get; set; }
-
-//        public int Id { get; }
-//        public bool ShouldReconnect { get; set; }
-//        public TimeSpan Timeout { get; set; }
-//        public Func<string, string> DataInterpreterString { get; set; }
-//        public Func<byte[], string> DataInterpreterBytes { get; set; }
-//        public DateTime? DisconnectTime { get; set; }
-//        public string Url { get; }
-//        public bool IsClosed => !Connected;
-//        public bool IsOpen => Connected;
-//        public bool PingConnection { get; set; }
-//        public TimeSpan PingInterval { get; set; }
-//        public SslProtocols SSLProtocols { get; set; }
-//        public Encoding Encoding { get; set; }
-
-//        public int ConnectCalls { get; private set; }
-//        public bool Reconnecting { get; set; }
-//        public string Origin { get; set; }
-//        public int? RatelimitPerSecond { get; set; }
-
-//        public double IncomingKbps => throw new NotImplementedException();
-
-//        public Uri Uri => new Uri("");
-
-//        public TimeSpan KeepAliveInterval { get; set; }
-
-//        public static int lastId = 0;
-//        public static object lastIdLock = new object();
-
-//        public TestSocket()
-//        {
-//            lock (lastIdLock)
-//            {
-//                Id = lastId + 1;
-//                lastId++;
-//            }
-//        }
-
-//        public Task<CallResult> ConnectAsync()
-//        {
-//            Connected = CanConnect;
-//            ConnectCalls++;
-//            if (CanConnect)
-//                InvokeOpen();
-//            return Task.FromResult(CanConnect ? new CallResult(null) : new CallResult(new CantConnectError()));
-//        }
-
-//        public bool Send(int requestId, string data, int weight)
-//        {
-//            if(!Connected)
-//                throw new Exception("Socket not connected");
-//            OnRequestSent?.Invoke(requestId);
-//            return true;
-//        }
-
-//        public void Reset()
-//        {
-//        }
-
-//        public Task CloseAsync()
-//        {
-//            Connected = false;
-//            DisconnectTime = DateTime.UtcNow;
-//            OnClose?.Invoke();
-//            return Task.FromResult(0);
-//        }
-
-//        public void SetProxy(string host, int port)
-//        {
-//            throw new NotImplementedException();
-//        }
-//        public void Dispose()
-//        {
-//        }
-
-//        public void InvokeClose()
-//        {
-//            Connected = false;
-//            DisconnectTime = DateTime.UtcNow;
-//            Reconnecting = true;
-//            OnClose?.Invoke();
-//        }
-
-//        public void InvokeOpen()
-//        {
-//            OnOpen?.Invoke();
-//        }
-
-//        public void InvokeMessage(string data)
-//        {
-//            OnStreamMessage?.Invoke(WebSocketMessageType.Text, new ReadOnlyMemory<byte>(Encoding.UTF8.GetBytes(data))).Wait();
-//        }
-
-//        public void SetProxy(ApiProxy proxy)
-//        {
-//            throw new NotImplementedException();
-//        }
-
-//        public void InvokeError(Exception error)
-//        {
-//            OnError?.Invoke(error);
-//        }
-//        public Task ReconnectAsync() => Task.CompletedTask;
-//    }
-//}

CryptoExchange.Net.UnitTests/TestImplementations/TestSocketClient.cs

@@ -1,135 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Threading;
-using System.Threading.Tasks;
-using CryptoExchange.Net.Authentication;
-using CryptoExchange.Net.Clients;
-using CryptoExchange.Net.Converters.MessageParsing;
-using CryptoExchange.Net.Interfaces;
-using CryptoExchange.Net.Objects;
-using CryptoExchange.Net.Objects.Options;
-using CryptoExchange.Net.Objects.Sockets;
-using CryptoExchange.Net.Sockets;
-using CryptoExchange.Net.UnitTests.TestImplementations.Sockets;
-using Microsoft.Extensions.Logging;
-using Moq;
-using CryptoExchange.Net.Testing.Implementations;
-using CryptoExchange.Net.SharedApis;
-using Microsoft.Extensions.Options;
-
-namespace CryptoExchange.Net.UnitTests.TestImplementations
-{
-    internal class TestSocketClient: BaseSocketClient
-    {
-        public TestSubSocketClient SubClient { get; }
-
-        /// <summary>
-        /// Create a new instance of KucoinSocketClient
-        /// </summary>
-        /// <param name="optionsFunc">Configure the options to use for this client</param>
-        public TestSocketClient(Action<TestSocketOptions> optionsDelegate = null)
-            : this(Options.Create(ApplyOptionsDelegate(optionsDelegate)), null)
-        {
-        }
-
-        public TestSocketClient(IOptions<TestSocketOptions> options, ILoggerFactory loggerFactory = null) : base(loggerFactory, "Test")
-        {
-            Initialize(options.Value);
-
-            SubClient = AddApiClient(new TestSubSocketClient(options.Value, options.Value.SubOptions));
-            SubClient.SocketFactory = new Mock<IWebsocketFactory>().Object;
-            Mock.Get(SubClient.SocketFactory).Setup(f => f.CreateWebsocket(It.IsAny<ILogger>(), It.IsAny<WebSocketParameters>())).Returns(new TestSocket("https://test.com"));
-        }
-
-        public TestSocket CreateSocket()
-        {
-            Mock.Get(SubClient.SocketFactory).Setup(f => f.CreateWebsocket(It.IsAny<ILogger>(), It.IsAny<WebSocketParameters>())).Returns(new TestSocket("https://test.com"));
-            return (TestSocket)SubClient.CreateSocketInternal("https://localhost:123/");
-        }
-                
-    }
-
-    public class TestEnvironment : TradeEnvironment
-    {
-        public string TestAddress { get; }
-
-        public TestEnvironment(string name, string url) : base(name)
-        {
-            TestAddress = url;
-        }
-    }
-
-    public class TestSocketOptions: SocketExchangeOptions<TestEnvironment>
-    {
-        public static TestSocketOptions Default = new TestSocketOptions
-        {
-            Environment = new TestEnvironment("Live", "https://test.test")
-        };
-
-        /// <summary>
-        /// ctor
-        /// </summary>
-        public TestSocketOptions()
-        {
-            Default?.Set(this);
-        }
-
-        public SocketApiOptions SubOptions { get; set; } = new SocketApiOptions();
-
-        internal TestSocketOptions Set(TestSocketOptions targetOptions)
-        {
-            targetOptions = base.Set<TestSocketOptions>(targetOptions);
-            targetOptions.SubOptions = SubOptions.Set(targetOptions.SubOptions);
-            return targetOptions;
-        }
-    }
-
-    public class TestSubSocketClient : SocketApiClient
-    {
-        private MessagePath _channelPath = MessagePath.Get().Property("channel");
-        private MessagePath _actionPath = MessagePath.Get().Property("action");
-        private MessagePath _topicPath = MessagePath.Get().Property("topic");
-
-        public Subscription TestSubscription { get; private set; } = null;
-
-        public TestSubSocketClient(TestSocketOptions options, SocketApiOptions apiOptions) : base(new TraceLogger(), options.Environment.TestAddress, options, apiOptions)
-        {
-
-        }
-
-        /// <inheritdoc />
-        public override string FormatSymbol(string baseAsset, string quoteAsset, TradingMode futuresType, DateTime? deliverDate = null) => $"{baseAsset.ToUpperInvariant()}{quoteAsset.ToUpperInvariant()}";
-
-        internal IWebsocket CreateSocketInternal(string address)
-        {
-            return CreateSocket(address);
-        }
-
-        protected override AuthenticationProvider CreateAuthenticationProvider(ApiCredentials credentials)
-            => new TestAuthProvider(credentials);
-
-        public CallResult ConnectSocketSub(SocketConnection sub)
-        {
-            return ConnectSocketAsync(sub).Result;
-        }
-
-        public override string GetListenerIdentifier(IMessageAccessor message)
-        {
-            if (!message.IsJson)
-            {
-                return "topic";
-            }
-
-            var id = message.GetValue<string>(_channelPath);
-            id ??= message.GetValue<string>(_topicPath);
-
-            return message.GetValue<string>(_actionPath) + "-" + id;
-        }
-
-        public Task<CallResult<UpdateSubscription>> SubscribeToSomethingAsync(string channel, Action<DataEvent<string>> onUpdate, CancellationToken ct)
-        {
-            TestSubscription = new TestSubscriptionWithResponseCheck<string>(channel, onUpdate);
-            return SubscribeAsync(TestSubscription, ct);
-        }        
-    }
-}

CryptoExchange.Net.UnitTests/TestSerializerContext.cs

@@ -0,0 +1,17 @@
+using CryptoExchange.Net.UnitTests.TestImplementations;
+using System.Collections.Generic;
+using System.Text.Json.Serialization;
+
+namespace CryptoExchange.Net.UnitTests
+{
+    [JsonSerializable(typeof(string))]
+    [JsonSerializable(typeof(int))]
+    [JsonSerializable(typeof(Dictionary<string, string>))]
+    [JsonSerializable(typeof(IDictionary<string, string>))]
+    [JsonSerializable(typeof(Dictionary<string, object>))]
+    [JsonSerializable(typeof(IDictionary<string, object>))]
+    [JsonSerializable(typeof(TestObject))]
+    internal partial class TestSerializerContext : JsonSerializerContext
+    {
+    }
+}

CryptoExchange.Net.sln

@@ -15,6 +15,8 @@ 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
@@ -41,6 +43,10 @@ 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/MapAttribute.cs

@@ -5,6 +5,7 @@ namespace CryptoExchange.Net.Attributes
     /// <summary>
     /// Map a enum entry to string values
     /// </summary>
+    [AttributeUsage(AttributeTargets.Field)]
     public class MapAttribute : Attribute
     {
         /// <summary>

CryptoExchange.Net/Attributes/NullableAttributes.cs

@@ -1,4 +1,4 @@
-#if !NETSTANDARD2_1
+#if NETSTANDARD2_0
 namespace System.Diagnostics.CodeAnalysis
 {
     using System;

CryptoExchange.Net/Authentication/ApiCredentials.cs

@@ -1,7 +1,6 @@
 using System;
 using System.IO;
-using CryptoExchange.Net.Converters.SystemTextJson;
-using CryptoExchange.Net.Converters.MessageParsing;
+using System.Threading.Tasks;
 
 namespace CryptoExchange.Net.Authentication
 {
@@ -20,6 +19,11 @@ namespace CryptoExchange.Net.Authentication
         /// </summary>
         public string Secret { get; set; }
 
+        /// <summary>
+        /// The api passphrase. Not needed on all exchanges
+        /// </summary>
+        public string? Pass { get; set; }
+
         /// <summary>
         /// Type of the credentials
         /// </summary>
@@ -30,8 +34,9 @@ namespace CryptoExchange.Net.Authentication
         /// </summary>
         /// <param name="key">The api key / label used for identification</param>
         /// <param name="secret">The api secret or private key used for signing</param>
+        /// <param name="pass">The api pass for the key. Not always needed</param>
         /// <param name="credentialType">The type of credentials</param>
-        public ApiCredentials(string key, string secret, ApiCredentialsType credentialType = ApiCredentialsType.Hmac)
+        public ApiCredentials(string key, string secret, string? pass = null, ApiCredentialsType credentialType = ApiCredentialsType.Hmac)
         {
             if (string.IsNullOrEmpty(key) || string.IsNullOrEmpty(secret))
                 throw new ArgumentException("Key and secret can't be null/empty");
@@ -39,6 +44,49 @@ namespace CryptoExchange.Net.Authentication
             CredentialType = credentialType;
             Key = key;
             Secret = secret;
+            Pass = pass;
+        }
+
+        /// <summary>
+        /// Create API credentials using an API key and secret generated by the server
+        /// </summary>
+        public static ApiCredentials HmacCredentials(string apiKey, string apiSecret, string? pass)
+        {
+            return new ApiCredentials(apiKey, apiSecret, pass, ApiCredentialsType.Hmac);
+        }
+
+        /// <summary>
+        /// Create API credentials using an API key and an RSA private key in PEM format
+        /// </summary>
+        public static ApiCredentials RsaPemCredentials(string apiKey, string privateKey)
+        {
+            return new ApiCredentials(apiKey, privateKey, credentialType: ApiCredentialsType.RsaPem);
+        }
+
+        /// <summary>
+        /// Create API credentials using an API key and an RSA private key in XML format
+        /// </summary>
+        public static ApiCredentials RsaXmlCredentials(string apiKey, string privateKey)
+        {
+            return new ApiCredentials(apiKey, privateKey, credentialType: ApiCredentialsType.RsaXml);
+        }
+
+        /// <summary>
+        /// Create API credentials using an API key and an Ed25519 private key
+        /// </summary>
+        public static ApiCredentials Ed25519Credentials(string apiKey, string privateKey)
+        {
+            return new ApiCredentials(apiKey, privateKey, credentialType: ApiCredentialsType.Ed25519);
+        }
+
+        /// <summary>
+        /// Load a key from a file
+        /// </summary>
+        public static string ReadFromFile(string path)
+        {
+            using var fileStream = File.OpenRead(path);
+            using var streamReader = new StreamReader(fileStream);
+            return streamReader.ReadToEnd();
         }
 
         /// <summary>
@@ -47,28 +95,7 @@ namespace CryptoExchange.Net.Authentication
         /// <returns></returns>
         public virtual ApiCredentials Copy()
         {
-            return new ApiCredentials(Key, Secret, CredentialType);
-        }
-
-        /// <summary>
-        /// Create Api credentials providing a stream containing json data. The json data should include two values: apiKey and apiSecret
-        /// </summary>
-        /// <param name="inputStream">The stream containing the json data</param>
-        /// <param name="identifierKey">A key to identify the credentials for the API. For example, when set to `binanceKey` the json data should contain a value for the property `binanceKey`. Defaults to 'apiKey'.</param>
-        /// <param name="identifierSecret">A key to identify the credentials for the API. For example, when set to `binanceSecret` the json data should contain a value for the property `binanceSecret`. Defaults to 'apiSecret'.</param>
-        public static ApiCredentials FromStream(Stream inputStream, string? identifierKey = null, string? identifierSecret = null)
-        {
-            var accessor = new SystemTextJsonStreamMessageAccessor();
-            if (!accessor.Read(inputStream, false).Result)
-                throw new ArgumentException("Input stream not valid json data");
-
-            var key = accessor.GetValue<string>(MessagePath.Get().Property(identifierKey ?? "apiKey"));
-            var secret = accessor.GetValue<string>(MessagePath.Get().Property(identifierSecret ?? "apiSecret"));
-            if (key == null || secret == null)
-                throw new ArgumentException("apiKey or apiSecret value not found in Json credential file");
-            
-            inputStream.Seek(0, SeekOrigin.Begin);
-            return new ApiCredentials(key, secret);
+            return new ApiCredentials(Key, Secret, Pass, CredentialType);
         }
     }
 }

CryptoExchange.Net/Authentication/ApiCredentialsType.cs

@@ -16,6 +16,10 @@
         /// <summary>
         /// Rsa keys credentials in pem/base64 format. Only available for .NetStandard 2.1 and up, use xml format for lower.
         /// </summary>
-        RsaPem
+        RsaPem,
+        /// <summary>
+        /// Ed25519 keys credentials
+        /// </summary>
+        Ed25519
     }
 }

CryptoExchange.Net/Authentication/AuthenticationProvider.cs

@@ -2,10 +2,13 @@
 using CryptoExchange.Net.Converters.SystemTextJson;
 using CryptoExchange.Net.Interfaces;
 using CryptoExchange.Net.Objects;
+#if NET8_0_OR_GREATER
+using NSec.Cryptography;
+#endif
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using System.Globalization;
-using System.Net.Http;
 using System.Security.Cryptography;
 using System.Text;
 
@@ -18,6 +21,11 @@ namespace CryptoExchange.Net.Authentication
     {
         internal IAuthTimeProvider TimeProvider { get; set; } = new AuthTimeProvider();
 
+        /// <summary>
+        /// The supported credential types
+        /// </summary>
+        public abstract ApiCredentialsType[] SupportedCredentialTypes { get; }
+
         /// <summary>
         /// Provided credentials
         /// </summary>
@@ -28,10 +36,21 @@ namespace CryptoExchange.Net.Authentication
         /// </summary>
         protected byte[] _sBytes;
 
+#if NET8_0_OR_GREATER
+        /// <summary>
+        /// The Ed25519 private key
+        /// </summary>
+        protected Key? Ed25519Key;
+#endif
+
         /// <summary>
         /// Get the API key of the current credentials
         /// </summary>
         public string ApiKey => _credentials.Key!;
+        /// <summary>
+        /// Get the Passphrase of the current credentials
+        /// </summary>
+        public string? Pass => _credentials.Pass;
 
         /// <summary>
         /// ctor
@@ -42,35 +61,26 @@ namespace CryptoExchange.Net.Authentication
             if (credentials.Key == null || credentials.Secret == null)
                 throw new ArgumentException("ApiKey/Secret needed");
 
+            if (!SupportedCredentialTypes.Any(x => x == credentials.CredentialType))
+                throw new ArgumentException($"Credential type {credentials.CredentialType} not supported");
+
+            if (credentials.CredentialType == ApiCredentialsType.Ed25519)
+            {
+#if !NET8_0_OR_GREATER
+                throw new ArgumentException($"Credential type Ed25519 only supported on Net8.0 or newer");
+#endif
+            }
+
             _credentials = credentials;
             _sBytes = Encoding.UTF8.GetBytes(credentials.Secret);
         }
 
         /// <summary>
-        /// Authenticate a request. Output parameters should include the providedParameters input
+        /// Authenticate a request
         /// </summary>
         /// <param name="apiClient">The Api client sending the request</param>
-        /// <param name="uri">The uri for the request</param>
-        /// <param name="method">The method of the request</param>
-        /// <param name="auth">If the requests should be authenticated</param>
-        /// <param name="arraySerialization">Array serialization type</param>
-        /// <param name="requestBodyFormat">The formatting of the request body</param>
-        /// <param name="uriParameters">Parameters that need to be in the Uri of the request. Should include the provided parameters if they should go in the uri</param>
-        /// <param name="bodyParameters">Parameters that need to be in the body of the request. Should include the provided parameters if they should go in the body</param>
-        /// <param name="headers">The headers that should be send with the request</param>
-        /// <param name="parameterPosition">The position where the providedParameters should go</param>
-        public abstract void AuthenticateRequest(
-            RestApiClient apiClient,
-            Uri uri,
-            HttpMethod method,
-            ref IDictionary<string, object>? uriParameters,
-            ref IDictionary<string, object>? bodyParameters,
-            ref Dictionary<string, string>? headers,
-            bool auth,
-            ArrayParametersSerialization arraySerialization,
-            HttpMethodParameterPosition parameterPosition,
-            RequestBodyFormat requestBodyFormat
-            );
+        /// <param name="requestConfig">The request configuration</param>
+        public abstract void ProcessRequest(RestApiClient apiClient, RestRequestConfiguration requestConfig);
 
         /// <summary>
         /// SHA256 sign the data and return the bytes
@@ -364,12 +374,42 @@ namespace CryptoExchange.Net.Authentication
             return outputType == SignOutputType.Base64 ? BytesToBase64String(resultBytes) : BytesToHexString(resultBytes);
         }
 
+        /// <summary>
+        /// Ed25519 sign the data 
+        /// </summary>
+        public string SignEd25519(string data, SignOutputType? outputType = null)
+            => SignEd25519(Encoding.ASCII.GetBytes(data), outputType);
+
+        /// <summary>
+        /// Ed25519 sign the data 
+        /// </summary>
+        public string SignEd25519(byte[] data, SignOutputType? outputType = null)
+        {
+#if NET8_0_OR_GREATER
+            if (Ed25519Key == null)
+            {
+                var key = _credentials.Secret!
+                        .Replace("\n", "")
+                        .Replace("-----BEGIN PRIVATE KEY-----", "")
+                        .Replace("-----END PRIVATE KEY-----", "")
+                        .Trim();
+                var keyBytes = Convert.FromBase64String(key);
+                Ed25519Key = Key.Import(SignatureAlgorithm.Ed25519, keyBytes, KeyBlobFormat.PkixPrivateKey);
+            }
+
+            var resultBytes = SignatureAlgorithm.Ed25519.Sign(Ed25519Key, data);
+            return outputType == SignOutputType.Base64 ? BytesToBase64String(resultBytes) : BytesToHexString(resultBytes);
+#else
+            throw new InvalidOperationException();
+#endif
+        }
+
         private RSA CreateRSA()
         {
             var rsa = RSA.Create();
             if (_credentials.CredentialType == ApiCredentialsType.RsaPem)
             {
-#if NETSTANDARD2_1_OR_GREATER
+#if NETSTANDARD2_1_OR_GREATER || NET9_0_OR_GREATER
                 // Read from pem private key
                 var key = _credentials.Secret!
                         .Replace("\n", "")
@@ -403,10 +443,14 @@ namespace CryptoExchange.Net.Authentication
         /// <returns></returns>
         protected static string BytesToHexString(byte[] buff)
         {
+#if NET9_0_OR_GREATER
+            return Convert.ToHexString(buff);
+#else
             var result = string.Empty;
             foreach (var t in buff)
                 result += t.ToString("X2");
             return result;
+#endif
         }
 
         /// <summary>
@@ -439,18 +483,31 @@ namespace CryptoExchange.Net.Authentication
             return DateTimeConverter.ConvertToMilliseconds(GetTimestamp(apiClient)).Value.ToString(CultureInfo.InvariantCulture);
         }
 
+        /// <summary>
+        /// Get millisecond timestamp as a long including the time sync offset from the api client
+        /// </summary>
+        /// <param name="apiClient"></param>
+        /// <returns></returns>
+        protected long GetMillisecondTimestampLong(RestApiClient apiClient)
+        {
+            return DateTimeConverter.ConvertToMilliseconds(GetTimestamp(apiClient)).Value;
+        }
+
         /// <summary>
         /// Return the serialized request body
         /// </summary>
         /// <param name="serializer"></param>
         /// <param name="parameters"></param>
         /// <returns></returns>
-        protected string GetSerializedBody(IMessageSerializer serializer, IDictionary<string, object> parameters)
+        protected static string GetSerializedBody(IMessageSerializer serializer, IDictionary<string, object> parameters)
         {
-            if (parameters.Count == 1 && parameters.ContainsKey(Constants.BodyPlaceHolderKey))
-                return serializer.Serialize(parameters[Constants.BodyPlaceHolderKey]);
+            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);
             else
-                return serializer.Serialize(parameters);
+                return stringSerializer.Serialize(parameters);
         }
     }
 

CryptoExchange.Net/Caching/MemoryCache.cs

@@ -1,11 +1,18 @@
 using System;
 using System.Collections.Concurrent;
+using System.Linq;
+using System.Threading;
 
 namespace CryptoExchange.Net.Caching
 {
     internal class MemoryCache
     {
         private readonly ConcurrentDictionary<string, CacheItem> _cache = new ConcurrentDictionary<string, CacheItem>();
+#if NET9_0_OR_GREATER
+        private readonly Lock _lock = new Lock();
+#else
+        private readonly object _lock = new object();
+#endif
 
         /// <summary>
         /// Add a new cache entry. Will override an existing entry if it already exists
@@ -26,16 +33,13 @@ namespace CryptoExchange.Net.Caching
         /// <returns>Cached value if it was in cache</returns>
         public object? Get(string key, TimeSpan maxAge)
         {
-            _cache.TryGetValue(key, out CacheItem value);
+            foreach (var item in _cache.Where(x => DateTime.UtcNow - x.Value.CacheTime > maxAge).ToList())
+                _cache.TryRemove(item.Key, out _);
+            
+            _cache.TryGetValue(key, out CacheItem? value);
             if (value == null)
                 return null;
 
-            if (DateTime.UtcNow - value.CacheTime > maxAge)
-            {
-                _cache.TryRemove(key, out _);
-                return null;
-            }
-
             return value.Value;
         }
 

CryptoExchange.Net/Clients/BaseApiClient.cs

@@ -1,7 +1,7 @@
 using System;
 using CryptoExchange.Net.Authentication;
-using CryptoExchange.Net.Interfaces;
-using CryptoExchange.Net.Objects;
+using CryptoExchange.Net.Interfaces.Clients;
+using CryptoExchange.Net.Objects.Errors;
 using CryptoExchange.Net.Objects.Options;
 using CryptoExchange.Net.SharedApis;
 using Microsoft.Extensions.Logging;
@@ -38,10 +38,11 @@ namespace CryptoExchange.Net.Clients
         /// </summary>
         public bool OutputOriginalData { get; }
 
-        /// <summary>
-        /// Whether or not API credentials have been configured for this client. Does not check the credentials are actually valid.
-        /// </summary>
-        public bool Authenticated => ApiOptions.ApiCredentials != null || ClientOptions.ApiCredentials != null;
+        /// <inheritdoc />
+        public bool Authenticated => ApiCredentials != null;
+
+        /// <inheritdoc />
+        public ApiCredentials? ApiCredentials { get; set; }
 
         /// <summary>
         /// Api options
@@ -53,11 +54,16 @@ namespace CryptoExchange.Net.Clients
         /// </summary>
         public ExchangeOptions ClientOptions { get; }
 
+        /// <summary>
+        /// Mapping of a response code to known error types
+        /// </summary>
+        protected internal virtual ErrorMapping ErrorMapping { get; } = new ErrorMapping([]);
+
         /// <summary>
         /// ctor
         /// </summary>
         /// <param name="logger">Logger</param>
-        /// <param name="outputOriginalData">Should data from this client include the orginal data in the call result</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="apiCredentials">Api credentials</param>
         /// <param name="clientOptions">Client options</param>
@@ -70,9 +76,10 @@ namespace CryptoExchange.Net.Clients
             ApiOptions = apiOptions;
             OutputOriginalData = outputOriginalData;
             BaseAddress = baseAddress;
+            ApiCredentials = apiCredentials?.Copy();
 
-            if (apiCredentials != null)
-                AuthenticationProvider = CreateAuthenticationProvider(apiCredentials.Copy());
+            if (ApiCredentials != null)
+                AuthenticationProvider = CreateAuthenticationProvider(ApiCredentials);
         }
 
         /// <summary>
@@ -85,12 +92,33 @@ namespace CryptoExchange.Net.Clients
         /// <inheritdoc />
         public abstract string FormatSymbol(string baseAsset, string quoteAsset, TradingMode tradingMode, DateTime? deliverDate = null);
 
+        /// <summary>
+        /// Get error info for a response code
+        /// </summary>
+        public ErrorInfo GetErrorInfo(int code, string? message = null) => GetErrorInfo(code.ToString(), message);
+
+        /// <summary>
+        /// Get error info for a response code
+        /// </summary>
+        public ErrorInfo GetErrorInfo(string code, string? message = null) => ErrorMapping.GetErrorInfo(code.ToString(), message);
+
         /// <inheritdoc />
         public void SetApiCredentials<T>(T credentials) where T : ApiCredentials
         {
-            ApiOptions.ApiCredentials = credentials;
-            if (credentials != null)
-                AuthenticationProvider = CreateAuthenticationProvider(credentials.Copy());
+            ApiCredentials = credentials?.Copy();
+            if (ApiCredentials != null)
+                AuthenticationProvider = CreateAuthenticationProvider(ApiCredentials);
+        }
+
+        /// <inheritdoc />
+        public virtual void SetOptions<T>(UpdateOptions<T> options) where T : ApiCredentials
+        {
+            ClientOptions.Proxy = options.Proxy;
+            ClientOptions.RequestTimeout = options.RequestTimeout ?? ClientOptions.RequestTimeout;
+
+            ApiCredentials = options.ApiCredentials?.Copy() ?? ApiCredentials;
+            if (ApiCredentials != null)
+                AuthenticationProvider = CreateAuthenticationProvider(ApiCredentials);
         }
 
         /// <summary>

CryptoExchange.Net/Clients/BaseClient.cs

@@ -1,9 +1,9 @@
 using CryptoExchange.Net.Authentication;
 using CryptoExchange.Net.Objects.Options;
 using Microsoft.Extensions.Logging;
-using Microsoft.Extensions.Logging.Abstractions;
 using System;
 using System.Collections.Generic;
+using System.Threading;
 
 namespace CryptoExchange.Net.Clients
 {
@@ -15,7 +15,7 @@ namespace CryptoExchange.Net.Clients
         /// <summary>
         /// Version of the CryptoExchange.Net base library
         /// </summary>
-        public Version CryptoExchangeLibVersion { get; } = typeof(BaseClient).Assembly.GetName().Version;
+        public Version CryptoExchangeLibVersion { get; } = typeof(BaseClient).Assembly.GetName().Version!;
 
         /// <summary>
         /// Version of the client implementation
@@ -27,7 +27,7 @@ namespace CryptoExchange.Net.Clients
                lock(_versionLock)
                 {
                     if (_exchangeVersion == null)
-                        _exchangeVersion = GetType().Assembly.GetName().Version;
+                        _exchangeVersion = GetType().Assembly.GetName().Version!;
 
                     return _exchangeVersion;
                 }
@@ -49,7 +49,11 @@ namespace CryptoExchange.Net.Clients
         /// </summary>
         protected internal ILogger _logger;
 
-        private object _versionLock = new object();
+#if NET9_0_OR_GREATER
+        private readonly Lock _versionLock = new Lock();
+#else
+        private readonly object _versionLock = new object();
+#endif
         private Version _exchangeVersion;
 
         /// <summary>
@@ -66,8 +70,6 @@ namespace CryptoExchange.Net.Clients
         protected BaseClient(ILoggerFactory? logger, string exchange)
 #pragma warning restore CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
         {
-            _logger = logger?.CreateLogger(exchange) ?? NullLoggerFactory.Instance.CreateLogger(exchange);
-
             Exchange = exchange;
         }
 
@@ -104,7 +106,6 @@ namespace CryptoExchange.Net.Clients
             if (ClientOptions == null)
                 throw new InvalidOperationException("Client should have called Initialize before adding API clients");
 
-            _logger.Log(LogLevel.Trace, $"  {apiClient.GetType().Name}, base address: {apiClient.BaseAddress}");
             ApiClients.Add(apiClient);
             return apiClient;
         }
@@ -124,7 +125,6 @@ namespace CryptoExchange.Net.Clients
         /// </summary>
         public virtual void Dispose()
         {
-            _logger.Log(LogLevel.Debug, "Disposing client");
             foreach (var client in ApiClients)
                 client.Dispose();
         }

CryptoExchange.Net/Clients/BaseRestClient.cs

@@ -1,6 +1,7 @@
 using System.Linq;
-using CryptoExchange.Net.Interfaces;
+using CryptoExchange.Net.Interfaces.Clients;
 using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Logging.Abstractions;
 
 namespace CryptoExchange.Net.Clients
 {
@@ -19,6 +20,9 @@ namespace CryptoExchange.Net.Clients
         /// <param name="name">The name of the API this client is for</param>
         protected BaseRestClient(ILoggerFactory? loggerFactory, string name) : base(loggerFactory, name)
         {
+            _logger = loggerFactory?.CreateLogger(name + ".RestClient") ?? NullLoggerFactory.Instance.CreateLogger(name);
+
+            LibraryHelpers.StaticLogger = loggerFactory?.CreateLogger("CryptoExchange");
         }
     }
 }

CryptoExchange.Net/Clients/BaseSocketClient.cs

@@ -1,12 +1,14 @@
-using System;
+using CryptoExchange.Net.Interfaces.Clients;
+using CryptoExchange.Net.Logging.Extensions;
+using CryptoExchange.Net.Objects.Options;
+using CryptoExchange.Net.Objects.Sockets;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Logging.Abstractions;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
-using CryptoExchange.Net.Interfaces;
-using CryptoExchange.Net.Logging.Extensions;
-using CryptoExchange.Net.Objects.Sockets;
-using Microsoft.Extensions.Logging;
 
 namespace CryptoExchange.Net.Clients
 {
@@ -28,15 +30,21 @@ namespace CryptoExchange.Net.Clients
         public int CurrentSubscriptions => ApiClients.OfType<SocketApiClient>().Sum(s => s.CurrentSubscriptions);
         /// <inheritdoc />
         public double IncomingKbps => ApiClients.OfType<SocketApiClient>().Sum(s => s.IncomingKbps);
+
+        /// <inheritdoc />
+        public new SocketExchangeOptions ClientOptions => (SocketExchangeOptions)base.ClientOptions;
         #endregion
 
         /// <summary>
         /// ctor
         /// </summary>
-        /// <param name="logger">Logger</param>
-        /// <param name="exchange">The name of the exchange this client is for</param>
-        protected BaseSocketClient(ILoggerFactory? logger, string exchange) : base(logger, exchange)
+        /// <param name="loggerFactory">Logger factory</param>
+        /// <param name="name">The name of the exchange this client is for</param>
+        protected BaseSocketClient(ILoggerFactory? loggerFactory, string name) : base(loggerFactory, name)
         {
+            _logger = loggerFactory?.CreateLogger(name + ".SocketClient") ?? NullLoggerFactory.Instance.CreateLogger(name);
+
+            LibraryHelpers.StaticLogger = loggerFactory?.CreateLogger("CryptoExchange");
         }
 
         /// <summary>
@@ -93,6 +101,7 @@ namespace CryptoExchange.Net.Clients
             {
                 tasks.Add(client.ReconnectAsync());
             }
+
             await Task.WhenAll(tasks.ToArray()).ConfigureAwait(false);
         }
 
@@ -106,6 +115,7 @@ namespace CryptoExchange.Net.Clients
             {
                 result.AppendLine(client.GetSubscriptionsState());
             }
+
             return result.ToString();
         }
 
@@ -120,6 +130,7 @@ namespace CryptoExchange.Net.Clients
             {
                 result.Add(client.GetState());
             }
+
             return result;
         }
     }

CryptoExchange.Net/Clients/CryptoBaseClient.cs

@@ -9,7 +9,7 @@ namespace CryptoExchange.Net.Clients
     /// </summary>
     public class CryptoBaseClient : IDisposable
     {
-        private Dictionary<Type, object> _serviceCache = new Dictionary<Type, object>();
+        private readonly Dictionary<Type, object> _serviceCache = new Dictionary<Type, object>();
 
         /// <summary>
         /// Service provider

CryptoExchange.Net/Clients/CryptoRestClient.cs

@@ -1,9 +1,5 @@
-using CryptoExchange.Net.Interfaces;
-using CryptoExchange.Net.Interfaces.CommonClients;
-using Microsoft.Extensions.DependencyInjection;
+using CryptoExchange.Net.Interfaces.Clients;
 using System;
-using System.Collections.Generic;
-using System.Linq;
 
 namespace CryptoExchange.Net.Clients
 {
@@ -24,24 +20,5 @@ namespace CryptoExchange.Net.Clients
         public CryptoRestClient(IServiceProvider serviceProvider) : base(serviceProvider)
         {
         }
-
-        /// <summary>
-        /// Get a list of the registered ISpotClient implementations
-        /// </summary>
-        /// <returns></returns>
-        public IEnumerable<ISpotClient> GetSpotClients()
-        {
-            if (_serviceProvider == null)
-                return new List<ISpotClient>();
-
-            return _serviceProvider.GetServices<ISpotClient>().ToList();
-        }
-
-        /// <summary>
-        /// Get an ISpotClient implementation by exchange name
-        /// </summary>
-        /// <param name="exchangeName"></param>
-        /// <returns></returns>
-        public ISpotClient? SpotClient(string exchangeName) => _serviceProvider?.GetServices<ISpotClient>()?.SingleOrDefault(s => s.ExchangeName.Equals(exchangeName, StringComparison.InvariantCultureIgnoreCase));
     }
-}
+}

CryptoExchange.Net/Clients/CryptoSocketClient.cs

@@ -1,4 +1,4 @@
-using CryptoExchange.Net.Interfaces;
+using CryptoExchange.Net.Interfaces.Clients;
 using System;
 
 namespace CryptoExchange.Net.Clients

CryptoExchange.Net/Clients/SocketApiClient.cs

@@ -1,11 +1,19 @@
-using CryptoExchange.Net.Converters.JsonNet;
+using CryptoExchange.Net.Converters.MessageParsing.DynamicConverters;
 using CryptoExchange.Net.Interfaces;
+using CryptoExchange.Net.Interfaces.Clients;
 using CryptoExchange.Net.Logging.Extensions;
 using CryptoExchange.Net.Objects;
+using CryptoExchange.Net.Objects.Errors;
 using CryptoExchange.Net.Objects.Options;
 using CryptoExchange.Net.Objects.Sockets;
+using CryptoExchange.Net.RateLimiting;
 using CryptoExchange.Net.RateLimiting.Interfaces;
 using CryptoExchange.Net.Sockets;
+using CryptoExchange.Net.Sockets.Default;
+using CryptoExchange.Net.Sockets.Default.Interfaces;
+using CryptoExchange.Net.Sockets.HighPerf;
+using CryptoExchange.Net.Sockets.HighPerf.Interfaces;
+using CryptoExchange.Net.Sockets.Interfaces;
 using Microsoft.Extensions.Logging;
 using System;
 using System.Collections.Concurrent;
@@ -26,11 +34,18 @@ namespace CryptoExchange.Net.Clients
         #region Fields
         /// <inheritdoc/>
         public IWebsocketFactory SocketFactory { get; set; } = new WebsocketFactory();
+        /// <inheritdoc/>
+        public IHighPerfConnectionFactory? HighPerfConnectionFactory { get; set; }
 
         /// <summary>
         /// List of socket connections currently connecting/connected
         /// </summary>
-        protected internal ConcurrentDictionary<int, SocketConnection> socketConnections = new();
+        protected internal ConcurrentDictionary<int, SocketConnection> _socketConnections = new();
+
+        /// <summary>
+        /// List of HighPerf socket connections currently connecting/connected
+        /// </summary>
+        protected internal ConcurrentDictionary<int, HighPerfSocketConnection> _highPerfSocketConnections = new();
 
         /// <summary>
         /// Semaphore used while creating sockets
@@ -42,6 +57,11 @@ namespace CryptoExchange.Net.Clients
         /// </summary>
         protected TimeSpan KeepAliveInterval { get; set; } = TimeSpan.FromSeconds(10);
 
+        /// <summary>
+        /// Keep alive timeout for websocket connection
+        /// </summary>
+        protected TimeSpan KeepAliveTimeout { get; set; } = TimeSpan.FromSeconds(10);
+
         /// <summary>
         /// Handlers for data from the socket which doesn't need to be forwarded to the caller. Ping or welcome messages for example.
         /// </summary>
@@ -66,7 +86,7 @@ namespace CryptoExchange.Net.Clients
         /// Periodic task registrations
         /// </summary>
         protected List<PeriodicTaskRegistration> PeriodicTaskRegistrations { get; set; } = new List<PeriodicTaskRegistration>();
-
+        
         /// <summary>
         /// List of address to keep an alive connection to
         /// </summary>
@@ -77,30 +97,35 @@ namespace CryptoExchange.Net.Clients
         /// </summary>
         protected bool AllowTopicsOnTheSameConnection { get; set; } = true;
 
+        /// <summary>
+        /// Whether to continue processing and forward unparsable messages to handlers
+        /// </summary>
+        protected internal bool ProcessUnparsableMessages { get; set; } = false;
+
         /// <inheritdoc />
         public double IncomingKbps
         {
             get
             {
-                if (!socketConnections.Any())
+                if (_socketConnections.IsEmpty)
                     return 0;
 
-                return socketConnections.Sum(s => s.Value.IncomingKbps);
+                return _socketConnections.Sum(s => s.Value.IncomingKbps);
             }
         }
 
         /// <inheritdoc />
-        public int CurrentConnections => socketConnections.Count;
+        public int CurrentConnections => _socketConnections.Count;
 
         /// <inheritdoc />
         public int CurrentSubscriptions
         {
             get
             {
-                if (!socketConnections.Any())
+                if (_socketConnections.IsEmpty)
                     return 0;
 
-                return socketConnections.Sum(s => s.Value.UserSubscriptionCount);
+                return _socketConnections.Sum(s => s.Value.UserSubscriptionCount);
             }
         }
 
@@ -110,6 +135,11 @@ namespace CryptoExchange.Net.Clients
         /// <inheritdoc />
         public new SocketApiOptions ApiOptions => (SocketApiOptions)base.ApiOptions;
 
+        /// <summary>
+        /// The max number of individual subscriptions on a single connection
+        /// </summary>
+        public int? MaxIndividualSubscriptionsPerConnection { get; set; }
+
         #endregion
 
         /// <summary>
@@ -133,13 +163,13 @@ namespace CryptoExchange.Net.Clients
         /// Create a message accessor instance
         /// </summary>
         /// <returns></returns>
-        protected internal virtual IByteMessageAccessor CreateAccessor() => new JsonNetByteMessageAccessor();
+        protected internal abstract IByteMessageAccessor CreateAccessor(WebSocketMessageType messageType);
 
         /// <summary>
         /// Create a serializer instance
         /// </summary>
         /// <returns></returns>
-        protected internal virtual IMessageSerializer CreateSerializer() => new JsonNetMessageSerializer();
+        protected internal abstract IMessageSerializer CreateSerializer();
 
         /// <summary>
         /// Keep an open connection to this url
@@ -158,7 +188,7 @@ 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<SocketConnection, Query> queryDelegate, Action<CallResult>? callback)
+        protected virtual void RegisterPeriodicQuery(string identifier, TimeSpan interval, Func<ISocketConnection, Query> queryDelegate, Action<SocketConnection, CallResult>? callback)
         {
             PeriodicTaskRegistrations.Add(new PeriodicTaskRegistration
             {
@@ -198,6 +228,9 @@ namespace CryptoExchange.Net.Clients
                 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.
@@ -206,9 +239,9 @@ namespace CryptoExchange.Net.Clients
             {
                 await semaphoreSlim.WaitAsync(ct).ConfigureAwait(false);
             }
-            catch (OperationCanceledException)
+            catch (OperationCanceledException tce)
             {
-                return new CallResult<UpdateSubscription>(new CancellationRequestedError());
+                return new CallResult<UpdateSubscription>(new CancellationRequestedError(tce));
             }
 
             try
@@ -216,7 +249,7 @@ namespace CryptoExchange.Net.Clients
                 while (true)
                 {
                     // Get a new or existing socket connection
-                    var socketResult = await GetSocketConnection(url, subscription.Authenticated, false, subscription.Topic).ConfigureAwait(false);
+                    var socketResult = await GetSocketConnection(url, subscription.Authenticated, false, ct, subscription.Topic, subscription.IndividualSubscriptionCount).ConfigureAwait(false);
                     if (!socketResult)
                         return socketResult.As<UpdateSubscription>(null);
 
@@ -239,7 +272,7 @@ namespace CryptoExchange.Net.Clients
 
                     var needsConnecting = !socketConnection.Connected;
 
-                    var connectResult = await ConnectIfNeededAsync(socketConnection, subscription.Authenticated).ConfigureAwait(false);
+                    var connectResult = await ConnectIfNeededAsync(socketConnection, subscription.Authenticated, ct).ConfigureAwait(false);
                     if (!connectResult)
                         return new CallResult<UpdateSubscription>(connectResult.Error!);
 
@@ -255,59 +288,164 @@ namespace CryptoExchange.Net.Clients
             if (socketConnection.PausedActivity)
             {
                 _logger.HasBeenPausedCantSubscribeAtThisMoment(socketConnection.SocketId);
-                return new CallResult<UpdateSubscription>(new ServerError("Socket is paused"));
+                return new CallResult<UpdateSubscription>(new ServerError(new ErrorInfo(ErrorType.WebsocketPaused, "Socket is paused")));
             }
 
-            var waitEvent = new AsyncResetEvent(false);
-            var subQuery = subscription.GetSubQuery(socketConnection);
+            void HandleSubscriptionComplete(bool success, object? response)
+            {
+                if (!success)
+                    return;
+
+                subscription.HandleSubQueryResponse(response);
+                subscription.Status = SubscriptionStatus.Subscribed;
+                if (ct != default)
+                {
+                    subscription.CancellationTokenRegistration = ct.Register(async () =>
+                    {
+                        _logger.CancellationTokenSetClosingSubscription(socketConnection.SocketId, subscription.Id);
+                        await socketConnection.CloseAsync(subscription).ConfigureAwait(false);
+                    }, false);
+                }
+            }
+
+            subscription.Status = SubscriptionStatus.Subscribing;
+            var subQuery = subscription.CreateSubscriptionQuery(socketConnection);
             if (subQuery != null)
             {
+                subQuery.OnComplete = () => HandleSubscriptionComplete(subQuery.Result?.Success ?? false, subQuery.Response);
+
                 // Send the request and wait for answer
-                var subResult = await socketConnection.SendAndWaitQueryAsync(subQuery, waitEvent).ConfigureAwait(false);
+                var subResult = await socketConnection.SendAndWaitQueryAsync(subQuery, ct).ConfigureAwait(false);
                 if (!subResult)
                 {
-                    waitEvent?.Set();
                     var isTimeout = subResult.Error is CancellationRequestedError;
-                    if (isTimeout && subscription.Confirmed)
+                    if (isTimeout && subscription.Status == SubscriptionStatus.Subscribed)
                     {
                         // No response received, but the subscription did receive updates. We'll assume success
                     }
                     else
                     {
                         _logger.FailedToSubscribe(socketConnection.SocketId, subResult.Error?.ToString());
-                        // If this was a timeout we still need to send an unsubscribe to prevent messages coming in later
+                        // If this was a server process error we still might need to send an unsubscribe to prevent messages coming in later
+                        subscription.Status = SubscriptionStatus.Pending;
                         await socketConnection.CloseAsync(subscription).ConfigureAwait(false);
                         return new CallResult<UpdateSubscription>(subResult.Error!);
                     }
                 }
-
-                subscription.HandleSubQueryResponse(subQuery.Response!);
+            }
+            else 
+            {
+                HandleSubscriptionComplete(true, null);
+            }
+
+            _logger.SubscriptionCompletedSuccessfully(socketConnection.SocketId, subscription.Id);
+            return new CallResult<UpdateSubscription>(new UpdateSubscription(socketConnection, subscription));
+        }
+
+        /// <summary>
+        /// Connect to an url and listen for data
+        /// </summary>
+        /// <param name="url">The URL to connect to</param>
+        /// <param name="subscription">The subscription</param>
+        /// <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>(
+            string url,
+            HighPerfSubscription<TUpdateType> subscription,
+            IHighPerfConnectionFactory connectionFactory,
+            CancellationToken ct)
+        {
+            if (_disposing)
+                return new CallResult<HighPerfUpdateSubscription>(new InvalidOperationError("Client disposed, can't subscribe"));
+
+            HighPerfSocketConnection<TUpdateType> 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 new CallResult<HighPerfUpdateSubscription>(new CancellationRequestedError(tce));
+            }
+
+            try
+            {
+                while (true)
+                {
+                    // Get a new or existing socket connection
+                    var socketResult = await GetHighPerfSocketConnection<TUpdateType>(url, connectionFactory, ct).ConfigureAwait(false);
+                    if (!socketResult)
+                        return socketResult.As<HighPerfUpdateSubscription>(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, false, ct).ConfigureAwait(false);
+                    if (!connectResult)
+                        return new CallResult<HighPerfUpdateSubscription>(connectResult.Error!);
+
+                    break;
+                }
+            }
+            finally
+            {
+                if (!released)
+                    semaphoreSlim.Release();
+            }
+
+            var subRequest = subscription.CreateSubscriptionQuery(socketConnection);
+            if (subRequest != null)
+            {
+                // Send the request and wait for answer
+                var sendResult = await socketConnection.SendAsync(subRequest).ConfigureAwait(false);
+                if (!sendResult)
+                {
+                    await socketConnection.CloseAsync().ConfigureAwait(false);
+                    return new CallResult<HighPerfUpdateSubscription>(sendResult.Error!);                    
+                }
             }
 
-            subscription.Confirmed = true;
             if (ct != default)
             {
                 subscription.CancellationTokenRegistration = ct.Register(async () =>
                 {
                     _logger.CancellationTokenSetClosingSubscription(socketConnection.SocketId, subscription.Id);
-                    await socketConnection.CloseAsync(subscription).ConfigureAwait(false);
+                    await socketConnection.CloseAsync().ConfigureAwait(false);
                 }, false);
             }
 
-            waitEvent?.Set();
             _logger.SubscriptionCompletedSuccessfully(socketConnection.SocketId, subscription.Id);
-            return new CallResult<UpdateSubscription>(new UpdateSubscription(socketConnection, subscription));
+            return new CallResult<HighPerfUpdateSubscription>(new HighPerfUpdateSubscription(socketConnection, subscription));
         }
 
         /// <summary>
         /// Send a query on a socket connection to the BaseAddress and wait for the response
         /// </summary>
         /// <typeparam name="THandlerResponse">Expected result type</typeparam>
-        /// <typeparam name="TServerResponse">The type returned to the caller</typeparam>
         /// <param name="query">The query</param>
         /// <param name="ct">Cancellation token</param>
         /// <returns></returns>
-        protected virtual Task<CallResult<THandlerResponse>> QueryAsync<TServerResponse, THandlerResponse>(Query<TServerResponse, THandlerResponse> query, CancellationToken ct = default)
+        protected virtual Task<CallResult<THandlerResponse>> QueryAsync<THandlerResponse>(Query<THandlerResponse> query, CancellationToken ct = default)
         {
             return QueryAsync(BaseAddress, query, ct);
         }
@@ -316,12 +454,11 @@ namespace CryptoExchange.Net.Clients
         /// Send a query on a socket connection and wait for the response
         /// </summary>
         /// <typeparam name="THandlerResponse">Expected result type</typeparam>
-        /// <typeparam name="TServerResponse">The type returned to the caller</typeparam>
         /// <param name="url">The url for the request</param>
         /// <param name="query">The query</param>
         /// <param name="ct">Cancellation token</param>
         /// <returns></returns>
-        protected virtual async Task<CallResult<THandlerResponse>> QueryAsync<TServerResponse, THandlerResponse>(string url, Query<TServerResponse, THandlerResponse> query, CancellationToken ct = default)
+        protected virtual async Task<CallResult<THandlerResponse>> QueryAsync<THandlerResponse>(string url, Query<THandlerResponse> query, CancellationToken ct = default)
         {
             if (_disposing)
                 return new CallResult<THandlerResponse>(new InvalidOperationError("Client disposed, can't query"));
@@ -334,7 +471,7 @@ namespace CryptoExchange.Net.Clients
             await semaphoreSlim.WaitAsync().ConfigureAwait(false);
             try
             {
-                var socketResult = await GetSocketConnection(url, query.Authenticated, true).ConfigureAwait(false);
+                var socketResult = await GetSocketConnection(url, query.Authenticated, true, ct).ConfigureAwait(false);
                 if (!socketResult)
                     return socketResult.As<THandlerResponse>(default);
 
@@ -347,7 +484,7 @@ namespace CryptoExchange.Net.Clients
                     released = true;
                 }
 
-                var connectResult = await ConnectIfNeededAsync(socketConnection, query.Authenticated).ConfigureAwait(false);
+                var connectResult = await ConnectIfNeededAsync(socketConnection, query.Authenticated, ct).ConfigureAwait(false);
                 if (!connectResult)
                     return new CallResult<THandlerResponse>(connectResult.Error!);
             }
@@ -360,13 +497,13 @@ namespace CryptoExchange.Net.Clients
             if (socketConnection.PausedActivity)
             {
                 _logger.HasBeenPausedCantSendQueryAtThisMoment(socketConnection.SocketId);
-                return new CallResult<THandlerResponse>(new ServerError("Socket is paused"));
+                return new CallResult<THandlerResponse>(new ServerError(new ErrorInfo(ErrorType.WebsocketPaused, "Socket is paused")));
             }
 
             if (ct.IsCancellationRequested)
                 return new CallResult<THandlerResponse>(new CancellationRequestedError());
 
-            return await socketConnection.SendAndWaitQueryAsync(query, null, ct).ConfigureAwait(false);
+            return await socketConnection.SendAndWaitQueryAsync(query, ct).ConfigureAwait(false);
         }
 
         /// <summary>
@@ -374,13 +511,14 @@ namespace CryptoExchange.Net.Clients
         /// </summary>
         /// <param name="socket">The connection to check</param>
         /// <param name="authenticated">Whether the socket should authenticated</param>
+        /// <param name="ct">Cancellation token</param>
         /// <returns></returns>
-        protected virtual async Task<CallResult> ConnectIfNeededAsync(SocketConnection socket, bool authenticated)
+        protected virtual async Task<CallResult> ConnectIfNeededAsync(ISocketConnection socket, bool authenticated, CancellationToken ct)
         {
             if (socket.Connected)
-                return new CallResult(null);
+                return CallResult.SuccessResult;
 
-            var connectResult = await ConnectSocketAsync(socket).ConfigureAwait(false);
+            var connectResult = await ConnectSocketAsync(socket, ct).ConfigureAwait(false);
             if (!connectResult)
                 return connectResult;
 
@@ -388,9 +526,12 @@ namespace CryptoExchange.Net.Clients
                 await Task.Delay(ClientOptions.DelayAfterConnect).ConfigureAwait(false);
 
             if (!authenticated || socket.Authenticated)
-                return new CallResult(null);
+                return CallResult.SuccessResult;
 
-            var result = await AuthenticateSocketAsync(socket).ConfigureAwait(false);
+            if (socket is not SocketConnection sc)
+                throw new InvalidOperationException("HighPerfSocketConnection not supported for authentication");
+
+            var result = await AuthenticateSocketAsync(sc).ConfigureAwait(false);
             if (!result)
                 await socket.CloseAsync().ConfigureAwait(false);
 
@@ -422,11 +563,12 @@ namespace CryptoExchange.Net.Clients
                     result.Error!.Message = "Authentication failed: " + result.Error.Message;
                     return new CallResult(result.Error)!;
                 }
+
+                _logger.Authenticated(socket.SocketId);
             }
 
-            _logger.Authenticated(socket.SocketId);
             socket.Authenticated = true;
-            return new CallResult(null);
+            return CallResult.SuccessResult;
         }
 
         /// <summary>
@@ -442,7 +584,7 @@ namespace CryptoExchange.Net.Clients
         protected void AddSystemSubscription(SystemSubscription systemSubscription)
         {
             systemSubscriptions.Add(systemSubscription);
-            foreach (var connection in socketConnections.Values)
+            foreach (var connection in _socketConnections.Values)
                 connection.AddSubscription(systemSubscription);
         }
 
@@ -462,7 +604,7 @@ namespace CryptoExchange.Net.Clients
         /// </summary>
         /// <param name="connection"></param>
         /// <returns></returns>
-        protected internal virtual Task<Uri?> GetReconnectUriAsync(SocketConnection connection)
+        protected internal virtual Task<Uri?> GetReconnectUriAsync(ISocketConnection connection)
         {
             return Task.FromResult<Uri?>(connection.ConnectionUri);
         }
@@ -474,7 +616,7 @@ namespace CryptoExchange.Net.Clients
         /// <returns></returns>
         protected internal virtual Task<CallResult> RevitalizeRequestAsync(Subscription subscription)
         {
-            return Task.FromResult(new CallResult(null));
+            return Task.FromResult(CallResult.SuccessResult);
         }
 
         /// <summary>
@@ -483,37 +625,91 @@ namespace CryptoExchange.Net.Clients
         /// <param name="address">The address the socket is for</param>
         /// <param name="authenticated">Whether the socket should be authenticated</param>
         /// <param name="dedicatedRequestConnection">Whether a dedicated request connection should be returned</param>
+        /// <param name="ct">Cancellation token</param>
         /// <param name="topic">The subscription topic, can be provided when multiple of the same topics are not allowed on a connection</param>
+        /// <param name="individualSubscriptionCount">The number of individual subscriptions in this subscribe request</param>
         /// <returns></returns>
-        protected virtual async Task<CallResult<SocketConnection>> GetSocketConnection(string address, bool authenticated, bool dedicatedRequestConnection, string? topic = null)
+        protected virtual async Task<CallResult<SocketConnection>> GetSocketConnection(
+            string address,
+            bool authenticated,
+            bool dedicatedRequestConnection, 
+            CancellationToken ct,
+            string? topic = null,
+            int individualSubscriptionCount = 1)
         {
-            var socketQuery = socketConnections.Where(s => (s.Value.Status == SocketConnection.SocketStatus.None || s.Value.Status == SocketConnection.SocketStatus.Connected)
-                                                      && s.Value.Tag.TrimEnd('/') == address.TrimEnd('/')
+            var socketQuery = _socketConnections.Where(s => s.Value.Tag.TrimEnd('/') == address.TrimEnd('/')
                                                       && s.Value.ApiClient.GetType() == GetType()
-                                                      && (s.Value.Authenticated == authenticated || !authenticated)
-                                                      && (AllowTopicsOnTheSameConnection || !s.Value.Topics.Contains(topic))
-                                                      && s.Value.Connected);
+                                                      && (AllowTopicsOnTheSameConnection || !s.Value.Topics.Contains(topic)))
+                                                .Select(x => x.Value)
+                                                .ToList();
 
-            SocketConnection connection;
+            // 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))
+            {
+                if (DateTime.UtcNow - delayStart > TimeSpan.FromSeconds(10))
+                {
+                    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());
+                    }
+
+                    break;
+                }
+
+                delayed = true;
+                try { await Task.Delay(50, ct).ConfigureAwait(false); } catch (Exception) { }
+
+                if (ct.IsCancellationRequested)
+                    return new CallResult<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.Connected).ToList();
+
+            SocketConnection? connection;
             if (!dedicatedRequestConnection)
             {
-                connection = socketQuery.Where(s => !s.Value.DedicatedRequestConnection.IsDedicatedRequestConnection).OrderBy(s => s.Value.UserSubscriptionCount).FirstOrDefault().Value;
+                connection = socketQuery.Where(s => !s.DedicatedRequestConnection.IsDedicatedRequestConnection).OrderBy(s => s.UserSubscriptionCount).FirstOrDefault();
             }
             else
             {
-                connection = socketQuery.Where(s => s.Value.DedicatedRequestConnection.IsDedicatedRequestConnection).FirstOrDefault().Value;
+                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;
             }
 
+            bool maxConnectionsReached = _socketConnections.Count >= (ApiOptions.MaxSocketConnections ?? ClientOptions.MaxSocketConnections);
             if (connection != null)
             {
-                if (connection.UserSubscriptionCount < ClientOptions.SocketSubscriptionsCombineTarget || socketConnections.Count >= (ApiOptions.MaxSocketConnections ?? ClientOptions.MaxSocketConnections) && socketConnections.All(s => s.Value.UserSubscriptionCount >= ClientOptions.SocketSubscriptionsCombineTarget))
+                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
-                    return new CallResult<SocketConnection>(connection);
+                    // 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);
+                }
             }
 
+            if (maxConnectionsReached)
+                return new CallResult<SocketConnection>(new InvalidOperationError("Max amount of socket connections reached"));
+
             var connectionAddress = await GetConnectionUrlAsync(address, authenticated).ConfigureAwait(false);
             if (!connectionAddress)
             {
@@ -524,9 +720,8 @@ namespace CryptoExchange.Net.Clients
             if (connectionAddress.Data != address)
                 _logger.ConnectionAddressSetTo(connectionAddress.Data!);
 
-            // Create new socket
-            var socket = CreateSocket(connectionAddress.Data!);
-            var socketConnection = new SocketConnection(_logger, this, socket, address);
+            // Create new socket connection
+            var socketConnection = new SocketConnection(_logger, SocketFactory, GetWebSocketParameters(connectionAddress.Data!), this, address);
             socketConnection.UnhandledMessage += HandleUnhandledMessage;
             socketConnection.ConnectRateLimitedAsync += HandleConnectRateLimitedAsync;
             if (dedicatedRequestConnection)
@@ -547,6 +742,38 @@ namespace CryptoExchange.Net.Clients
             return new CallResult<SocketConnection>(socketConnection);
         }
 
+
+        /// <summary>
+        /// Gets a connection for a new subscription or query. Can be an existing if there are open position or a new one.
+        /// </summary>
+        /// <param name="address">The address the socket is for</param>
+        /// <param name="connectionFactory">The factory for creating a socket connection</param>
+        /// <param name="ct">Cancellation token</param>
+        /// <returns></returns>
+        protected virtual async Task<CallResult<HighPerfSocketConnection<TUpdateType>>> GetHighPerfSocketConnection<TUpdateType>(
+            string address,
+            IHighPerfConnectionFactory connectionFactory,
+            CancellationToken ct)
+        {
+            var connectionAddress = await GetConnectionUrlAsync(address, false).ConfigureAwait(false);
+            if (!connectionAddress)
+            {
+                _logger.FailedToDetermineConnectionUrl(connectionAddress.Error?.ToString());
+                return connectionAddress.As<HighPerfSocketConnection<TUpdateType>>(null);
+            }
+
+            if (connectionAddress.Data != address)
+                _logger.ConnectionAddressSetTo(connectionAddress.Data!);
+
+            // Create new socket connection
+            var socketConnection = connectionFactory.CreateHighPerfConnection<TUpdateType>(_logger, SocketFactory, GetWebSocketParameters(connectionAddress.Data!), this, address);
+            foreach (var ptg in PeriodicTaskRegistrations)
+                socketConnection.QueryPeriodic(ptg.Identifier, ptg.Interval, (con) => ptg.QueryDelegate(con).Request);
+
+            return new CallResult<HighPerfSocketConnection<TUpdateType>>(socketConnection);
+        }
+
+
         /// <summary>
         /// Process an unhandled message
         /// </summary>
@@ -560,11 +787,12 @@ namespace CryptoExchange.Net.Clients
         /// </summary>
         protected async virtual Task HandleConnectRateLimitedAsync()
         {
-            if (ClientOptions.RateLimiterEnabled && RateLimiter is not null && ClientOptions.ConnectDelayAfterRateLimited is not null)
+            if (ClientOptions.RateLimiterEnabled && ClientOptions.ConnectDelayAfterRateLimited.HasValue)
             {
                 var retryAfter = DateTime.UtcNow.Add(ClientOptions.ConnectDelayAfterRateLimited.Value);
                 _logger.AddingRetryAfterGuard(retryAfter);
-                await RateLimiter.SetRetryAfterGuardAsync(retryAfter, RateLimiting.RateLimitItemType.Connection).ConfigureAwait(false);
+                RateLimiter ??= new RateLimitGate("Connection");
+                await RateLimiter.SetRetryAfterGuardAsync(retryAfter, RateLimitItemType.Connection).ConfigureAwait(false);
             }
         }
 
@@ -572,13 +800,17 @@ namespace CryptoExchange.Net.Clients
         /// Connect a socket
         /// </summary>
         /// <param name="socketConnection">The socket to connect</param>
+        /// <param name="ct">Cancellation token</param>
         /// <returns></returns>
-        protected virtual async Task<CallResult> ConnectSocketAsync(SocketConnection socketConnection)
+        protected virtual async Task<CallResult> ConnectSocketAsync(ISocketConnection socketConnection, CancellationToken ct)
         {
-            var connectResult = await socketConnection.ConnectAsync().ConfigureAwait(false);
+            var connectResult = await socketConnection.ConnectAsync(ct).ConfigureAwait(false);
             if (connectResult)
             {
-                socketConnections.TryAdd(socketConnection.SocketId, socketConnection);
+                if (socketConnection is SocketConnection sc)
+                    _socketConnections.TryAdd(socketConnection.SocketId, sc);
+                else if (socketConnection is HighPerfSocketConnection hsc)
+                    _highPerfSocketConnections.TryAdd(socketConnection.SocketId, hsc);
                 return connectResult;
             }
 
@@ -595,25 +827,16 @@ namespace CryptoExchange.Net.Clients
             => new(new Uri(address), ClientOptions.ReconnectPolicy)
             {
                 KeepAliveInterval = KeepAliveInterval,
+                KeepAliveTimeout = KeepAliveTimeout,
                 ReconnectInterval = ClientOptions.ReconnectInterval,
                 RateLimiter = ClientOptions.RateLimiterEnabled ? RateLimiter : null,
-                RateLimitingBehaviour = ClientOptions.RateLimitingBehaviour,
+                RateLimitingBehavior = ClientOptions.RateLimitingBehaviour,
                 Proxy = ClientOptions.Proxy,
-                Timeout = ApiOptions.SocketNoDataTimeout ?? ClientOptions.SocketNoDataTimeout
+                Timeout = ApiOptions.SocketNoDataTimeout ?? ClientOptions.SocketNoDataTimeout,
+                ReceiveBufferSize = ClientOptions.ReceiveBufferSize,
+                UseUpdatedDeserialization = ClientOptions.UseUpdatedDeserialization
             };
 
-        /// <summary>
-        /// Create a socket for an address
-        /// </summary>
-        /// <param name="address">The address the socket should connect to</param>
-        /// <returns></returns>
-        protected virtual IWebsocket CreateSocket(string address)
-        {
-            var socket = SocketFactory.CreateWebsocket(_logger, GetWebSocketParameters(address));
-            _logger.SocketCreatedForAddress(socket.Id, address);
-            return socket;
-        }
-
         /// <summary>
         /// Unsubscribe an update subscription
         /// </summary>
@@ -623,7 +846,7 @@ namespace CryptoExchange.Net.Clients
         {
             Subscription? subscription = null;
             SocketConnection? connection = null;
-            foreach (var socket in socketConnections.Values.ToList())
+            foreach (var socket in _socketConnections.Values.ToList())
             {
                 subscription = socket.GetSubscription(subscriptionId);
                 if (subscription != null)
@@ -661,18 +884,25 @@ namespace CryptoExchange.Net.Clients
         /// <returns></returns>
         public virtual async Task UnsubscribeAllAsync()
         {
-            var sum = socketConnections.Sum(s => s.Value.UserSubscriptionCount);
+            var sum = _socketConnections.Sum(s => s.Value.UserSubscriptionCount) + _highPerfSocketConnections.Sum(s => s.Value.UserSubscriptionCount);
             if (sum == 0)
                 return;
 
-            _logger.UnsubscribingAll(socketConnections.Sum(s => s.Value.UserSubscriptionCount));
+            _logger.UnsubscribingAll(sum);
             var tasks = new List<Task>();
+            
+            var socketList = _socketConnections.Values;
+            foreach (var connection in socketList)
             {
-                var socketList = socketConnections.Values;
-                foreach (var connection in socketList.Where(s => !s.DedicatedRequestConnection.IsDedicatedRequestConnection))
-                    tasks.Add(connection.CloseAsync());
+                foreach(var subscription in connection.Subscriptions.Where(x => x.UserSubscription))
+                    tasks.Add(connection.CloseAsync(subscription));
             }
 
+            var highPerfSocketList = _highPerfSocketConnections.Values;
+            foreach (var connection in highPerfSocketList)
+                tasks.Add(connection.CloseAsync());
+            
+
             await Task.WhenAll(tasks.ToArray()).ConfigureAwait(false);
         }
 
@@ -682,10 +912,10 @@ namespace CryptoExchange.Net.Clients
         /// <returns></returns>
         public virtual async Task ReconnectAsync()
         {
-            _logger.ReconnectingAllConnections(socketConnections.Count);
+            _logger.ReconnectingAllConnections(_socketConnections.Count);
             var tasks = new List<Task>();
             {
-                var socketList = socketConnections.Values;
+                var socketList = _socketConnections.Values;
                 foreach (var sub in socketList)
                     tasks.Add(sub.TriggerReconnectAsync());
             }
@@ -698,16 +928,35 @@ namespace CryptoExchange.Net.Clients
         {
             foreach (var item in DedicatedConnectionConfigs)
             {
-                var socketResult = await GetSocketConnection(item.SocketAddress, item.Authenticated, true).ConfigureAwait(false);
+                var socketResult = await GetSocketConnection(item.SocketAddress, item.Authenticated, true, CancellationToken.None).ConfigureAwait(false);
                 if (!socketResult)
                     return socketResult.AsDataless();
 
-                var connectResult = await ConnectIfNeededAsync(socketResult.Data, item.Authenticated).ConfigureAwait(false);
+                var connectResult = await ConnectIfNeededAsync(socketResult.Data, item.Authenticated, default).ConfigureAwait(false);
                 if (!connectResult)
                     return new CallResult(connectResult.Error!);
             }
 
-            return new CallResult(null);
+            return CallResult.SuccessResult;
+        }
+
+        /// <inheritdoc />
+        public override void SetOptions<T>(UpdateOptions<T> options)
+        {
+            var previousProxyIsSet = ClientOptions.Proxy != null;
+            base.SetOptions(options);
+
+            if ((!previousProxyIsSet && options.Proxy == null)
+                || _socketConnections.IsEmpty)
+            {
+                return;
+            }
+
+            _logger.LogInformation("Reconnecting websockets to apply proxy");
+
+            // Update proxy, also triggers reconnect
+            foreach (var connection in _socketConnections)
+                _ = connection.Value.UpdateProxy(options.Proxy);
         }
 
         /// <summary>
@@ -725,15 +974,15 @@ namespace CryptoExchange.Net.Clients
         /// <returns></returns>
         public SocketApiClientState GetState(bool includeSubDetails = true)
         {
-            var connectionStates = new List<SocketConnection.SocketConnectionState>();
-            foreach (var socketIdAndConnection in socketConnections)
+            var connectionStates = new List<SocketConnectionState>();
+            foreach (var socketIdAndConnection in _socketConnections)
             {
                 SocketConnection connection = socketIdAndConnection.Value;
-                SocketConnection.SocketConnectionState connectionState = connection.GetState(includeSubDetails);
+                SocketConnectionState connectionState = connection.GetState(includeSubDetails);
                 connectionStates.Add(connectionState);
             }
 
-            return new SocketApiClientState(socketConnections.Count, CurrentSubscriptions, IncomingKbps, connectionStates);
+            return new SocketApiClientState(_socketConnections.Count, CurrentSubscriptions, IncomingKbps, connectionStates);
         }
 
         /// <summary>
@@ -747,7 +996,7 @@ namespace CryptoExchange.Net.Clients
             int Connections,
             int Subscriptions,
             double DownloadSpeed,
-            List<SocketConnection.SocketConnectionState> ConnectionStates)
+            List<SocketConnectionState> ConnectionStates)
         {
             /// <summary>
             /// Print the state of the client
@@ -776,9 +1025,9 @@ namespace CryptoExchange.Net.Clients
                         cs.SubscriptionStates.ForEach(subState =>
                         {
                             sb.AppendLine($"\t\t\tId: {subState.Id}");
-                            sb.AppendLine($"\t\t\tConfirmed: {subState.Confirmed}");
+                            sb.AppendLine($"\t\t\tStatus: {subState.Status}");
                             sb.AppendLine($"\t\t\tInvocations: {subState.Invocations}");
-                            sb.AppendLine($"\t\t\tIdentifiers: [{string.Join(",", subState.Identifiers)}]");
+                            sb.AppendLine($"\t\t\tIdentifiers: [{subState.ListenMatcher.ToString()}]");
                         });
                     }
                 });
@@ -795,7 +1044,7 @@ namespace CryptoExchange.Net.Clients
             _disposing = true;
             var tasks = new List<Task>();
             {
-                var socketList = socketConnections.Values.Where(x => x.UserSubscriptionCount > 0 || x.Connected);
+                var socketList = _socketConnections.Values.Where(x => x.UserSubscriptionCount > 0 || x.Connected);
                 if (socketList.Any())
                     _logger.DisposingSocketClient();
 
@@ -819,10 +1068,16 @@ namespace CryptoExchange.Net.Clients
         /// <summary>
         /// Preprocess a stream message
         /// </summary>
-        /// <param name="connection"></param>
-        /// <param name="type"></param>
-        /// <param name="data"></param>
-        /// <returns></returns>
+        public virtual ReadOnlySpan<byte> PreprocessStreamMessage(SocketConnection connection, WebSocketMessageType type, ReadOnlySpan<byte> data) => data;
+        /// <summary>
+        /// Preprocess a stream message
+        /// </summary>
         public virtual ReadOnlyMemory<byte> PreprocessStreamMessage(SocketConnection connection, WebSocketMessageType type, ReadOnlyMemory<byte> data) => data;
+
+        /// <summary>
+        /// Create a new message converter instance
+        /// </summary>
+        /// <returns></returns>
+        public abstract ISocketMessageHandler CreateMessageConverter(WebSocketMessageType messageType);
     }
 }

CryptoExchange.Net/CommonObjects/Balance.cs

@@ -1,21 +0,0 @@
-namespace CryptoExchange.Net.CommonObjects
-{
-    /// <summary>
-    /// Balance data
-    /// </summary>
-    public class Balance: BaseCommonObject
-    {
-        /// <summary>
-        /// The asset name
-        /// </summary>
-        public string Asset { get; set;  } = string.Empty;
-        /// <summary>
-        /// Quantity available
-        /// </summary>
-        public decimal? Available { get; set; }
-        /// <summary>
-        /// Total quantity
-        /// </summary>
-        public decimal? Total { get; set;  }
-    }
-}

CryptoExchange.Net/CommonObjects/BaseComonObject.cs

@@ -1,13 +0,0 @@
-namespace CryptoExchange.Net.CommonObjects
-{
-    /// <summary>
-    /// Base class for common objects
-    /// </summary>
-    public class BaseCommonObject
-    {
-        /// <summary>
-        /// The source object the data is derived from
-        /// </summary>
-        public object SourceObject { get; set; } = null!;
-    }
-}

CryptoExchange.Net/CommonObjects/Enums.cs

@@ -1,73 +0,0 @@
-namespace CryptoExchange.Net.CommonObjects
-{
-    /// <summary>
-    /// Order type
-    /// </summary>
-    public enum CommonOrderType
-    {
-        /// <summary>
-        /// Limit type
-        /// </summary>
-        Limit,
-        /// <summary>
-        /// Market type
-        /// </summary>
-        Market,
-        /// <summary>
-        /// Other order type
-        /// </summary>
-        Other
-    }
-
-    /// <summary>
-    /// Order side
-    /// </summary>
-    public enum CommonOrderSide
-    {
-        /// <summary>
-        /// Buy order
-        /// </summary>
-        Buy,
-        /// <summary>
-        /// Sell order
-        /// </summary>
-        Sell
-    }
-    /// <summary>
-    /// Order status
-    /// </summary>
-    public enum CommonOrderStatus
-    {
-        /// <summary>
-        /// placed and not fully filled order
-        /// </summary>
-        Active,
-        /// <summary>
-        /// canceled order
-        /// </summary>
-        Canceled,
-        /// <summary>
-        /// filled order
-        /// </summary>
-        Filled
-    }
-    
-    /// <summary>
-    /// Position side
-    /// </summary>
-    public enum CommonPositionSide
-    {
-        /// <summary>
-        /// Long position
-        /// </summary>
-        Long,
-        /// <summary>
-        /// Short position
-        /// </summary>
-        Short,
-        /// <summary>
-        /// Both
-        /// </summary>
-        Both
-    }
-}

CryptoExchange.Net/CommonObjects/Kline.cs

@@ -1,35 +0,0 @@
-using System;
-
-namespace CryptoExchange.Net.CommonObjects
-{
-    /// <summary>
-    /// Kline data
-    /// </summary>
-    public class Kline: BaseCommonObject
-    {
-        /// <summary>
-        /// Opening time of the kline
-        /// </summary>
-        public DateTime OpenTime { get; set; }
-        /// <summary>
-        /// Price at the open time
-        /// </summary>
-        public decimal? OpenPrice { get; set; }
-        /// <summary>
-        /// Highest price of the kline
-        /// </summary>
-        public decimal? HighPrice { get; set; }
-        /// <summary>
-        /// Lowest price of the kline
-        /// </summary>
-        public decimal? LowPrice { get; set; }
-        /// <summary>
-        /// Close price of the kline
-        /// </summary>
-        public decimal? ClosePrice { get; set; }
-        /// <summary>
-        /// Volume of the kline
-        /// </summary>
-        public decimal? Volume { get; set; }
-    }
-}

CryptoExchange.Net/CommonObjects/Order.cs

@@ -1,47 +0,0 @@
-using System;
-
-namespace CryptoExchange.Net.CommonObjects
-{
-    /// <summary>
-    /// Order data
-    /// </summary>
-    public class Order: BaseCommonObject
-    {
-        /// <summary>
-        /// Id of the order
-        /// </summary>
-        public string Id { get; set; } = string.Empty;
-        /// <summary>
-        /// Symbol of the order
-        /// </summary>
-        public string Symbol { get; set; } = string.Empty;
-        /// <summary>
-        /// Price of the order
-        /// </summary>
-        public decimal? Price { get; set; }
-        /// <summary>
-        /// Quantity of the order
-        /// </summary>
-        public decimal? Quantity { get; set; }
-        /// <summary>
-        /// The quantity of the order which has been filled
-        /// </summary>
-        public decimal? QuantityFilled { get; set; }
-        /// <summary>
-        /// Status of the order
-        /// </summary>
-        public CommonOrderStatus Status { get; set; }
-        /// <summary>
-        /// Side of the order
-        /// </summary>
-        public CommonOrderSide Side { get; set; }
-        /// <summary>
-        /// Type of the order
-        /// </summary>
-        public CommonOrderType Type { get; set; }
-        /// <summary>
-        /// Order time
-        /// </summary>
-        public DateTime Timestamp { get; set; }
-    }
-}

CryptoExchange.Net/CommonObjects/OrderBook.cs

@@ -1,20 +0,0 @@
-using System;
-using System.Collections.Generic;
-
-namespace CryptoExchange.Net.CommonObjects
-{
-    /// <summary>
-    /// Order book data
-    /// </summary>
-    public class OrderBook: BaseCommonObject
-    {
-        /// <summary>
-        /// List of bids
-        /// </summary>
-        public IEnumerable<OrderBookEntry> Bids { get; set; } = Array.Empty<OrderBookEntry>();
-        /// <summary>
-        /// List of asks
-        /// </summary>
-        public IEnumerable<OrderBookEntry> Asks { get; set; } = Array.Empty<OrderBookEntry>();
-    }
-}

CryptoExchange.Net/CommonObjects/OrderBookEntry.cs

@@ -1,17 +0,0 @@
-namespace CryptoExchange.Net.CommonObjects
-{
-    /// <summary>
-    /// Order book entry
-    /// </summary>
-    public class OrderBookEntry
-    {
-        /// <summary>
-        /// Quantity of the entry
-        /// </summary>
-        public decimal Quantity { get; set; }
-        /// <summary>
-        /// Price of the entry
-        /// </summary>
-        public decimal Price { get; set; }
-    }
-}

CryptoExchange.Net/CommonObjects/OrderId.cs

@@ -1,13 +0,0 @@
-namespace CryptoExchange.Net.CommonObjects
-{
-    /// <summary>
-    /// Id of an order
-    /// </summary>
-    public class OrderId: BaseCommonObject
-    {
-        /// <summary>
-        /// Id of an order
-        /// </summary>
-        public string Id { get; set; } = string.Empty;
-    }
-}

CryptoExchange.Net/CommonObjects/Position.cs

@@ -1,65 +0,0 @@
-namespace CryptoExchange.Net.CommonObjects
-{
-    /// <summary>
-    /// Position data
-    /// </summary>
-    public class Position: BaseCommonObject
-    {
-        /// <summary>
-        /// Id of the position
-        /// </summary>
-        public string? Id { get; set; }
-        /// <summary>
-        /// Symbol of the position
-        /// </summary>
-        public string Symbol { get; set; } = string.Empty;
-        /// <summary>
-        /// Leverage
-        /// </summary>
-        public decimal Leverage { get; set; }
-        /// <summary>
-        /// Position quantity
-        /// </summary>
-        public decimal Quantity { get; set; }
-        /// <summary>
-        /// Entry price
-        /// </summary>
-        public decimal? EntryPrice { get; set; }
-        /// <summary>
-        /// Liquidation price
-        /// </summary>
-        public decimal? LiquidationPrice { get; set; }
-        /// <summary>
-        /// Unrealized profit and loss
-        /// </summary>
-        public decimal? UnrealizedPnl { get; set; }
-        /// <summary>
-        /// Realized profit and loss
-        /// </summary>
-        public decimal? RealizedPnl { get; set; }
-        /// <summary>
-        /// Mark price
-        /// </summary>
-        public decimal? MarkPrice { get; set; }
-        /// <summary>
-        /// Auto adding margin
-        /// </summary>
-        public bool? AutoMargin { get; set; }
-        /// <summary>
-        /// Position margin
-        /// </summary>
-        public decimal? PositionMargin { get; set; }
-        /// <summary>
-        /// Position side
-        /// </summary>
-        public CommonPositionSide? Side { get; set; }
-        /// <summary>
-        /// Is isolated
-        /// </summary>
-        public bool? Isolated { get; set; }
-        /// <summary>
-        /// Maintenance margin
-        /// </summary>
-        public decimal? MaintananceMargin { get; set; }
-    }
-}

CryptoExchange.Net/CommonObjects/Symbol.cs

@@ -1,33 +0,0 @@
-namespace CryptoExchange.Net.CommonObjects
-{
-    /// <summary>
-    /// Symbol data
-    /// </summary>
-    public class Symbol: BaseCommonObject
-    {
-        /// <summary>
-        /// Name of the symbol
-        /// </summary>
-        public string Name { get; set; } = string.Empty;
-        /// <summary>
-        /// Minimal quantity of an order
-        /// </summary>
-        public decimal? MinTradeQuantity { get; set; }
-        /// <summary>
-        /// Step with which the quantity should increase
-        /// </summary>
-        public decimal? QuantityStep { get; set; } 
-        /// <summary>
-        /// step with which the price should increase
-        /// </summary>
-        public decimal? PriceStep { get; set; } 
-        /// <summary>
-        /// The max amount of decimals for quantity
-        /// </summary>
-        public int? QuantityDecimals { get; set; } 
-        /// <summary>
-        /// The max amount of decimal for price
-        /// </summary>
-        public int? PriceDecimals { get; set; } 
-    }
-}

CryptoExchange.Net/CommonObjects/Ticker.cs

@@ -1,33 +0,0 @@
-namespace CryptoExchange.Net.CommonObjects
-{
-    /// <summary>
-    /// Ticker data
-    /// </summary>
-    public class Ticker: BaseCommonObject
-    {
-        /// <summary>
-        /// Symbol
-        /// </summary>
-        public string Symbol { get; set; } = string.Empty;
-        /// <summary>
-        /// Price 24 hours ago
-        /// </summary>
-        public decimal? Price24H { get; set; }
-        /// <summary>
-        /// Last trade price
-        /// </summary>
-        public decimal? LastPrice { get; set; }
-        /// <summary>
-        /// 24 hour low price
-        /// </summary>
-        public decimal? LowPrice { get; set; }
-        /// <summary>
-        /// 24 hour high price
-        /// </summary>
-        public decimal? HighPrice { get; set; }
-        /// <summary>
-        /// 24 hour volume
-        /// </summary>
-        public decimal? Volume { get; set; }
-    }
-}

CryptoExchange.Net/CommonObjects/Trade.cs

@@ -1,50 +0,0 @@
-using System;
-
-namespace CryptoExchange.Net.CommonObjects
-{
-    /// <summary>
-    /// Trade data
-    /// </summary>
-    public class Trade: BaseCommonObject
-    {
-        /// <summary>
-        /// Symbol of the trade
-        /// </summary>
-        public string Symbol { get; set; } = string.Empty;
-        /// <summary>
-        /// Price of the trade
-        /// </summary>
-        public decimal Price { get; set; }
-        /// <summary>
-        /// Quantity of the trade
-        /// </summary>
-        public decimal Quantity { get; set; }
-        /// <summary>
-        /// Timestamp of the trade
-        /// </summary>
-        public DateTime Timestamp { get; set; }
-    }
-
-    /// <summary>
-    /// User trade info
-    /// </summary>
-    public class UserTrade: Trade
-    {
-        /// <summary>
-        /// Id of the trade
-        /// </summary>
-        public string Id { get; set; } = string.Empty;
-        /// <summary>
-        /// Order id of the trade
-        /// </summary>
-        public string? OrderId { get; set; }
-        /// <summary>
-        /// Fee of the trade
-        /// </summary>
-        public decimal? Fee { get; set; }
-        /// <summary>
-        /// The asset the fee is paid in
-        /// </summary>
-        public string? FeeAsset { get; set; }
-    }
-}

CryptoExchange.Net/Converters/JsonNet/ArrayConverter.cs

@@ -1,195 +0,0 @@
-using System;
-using System.Collections;
-using System.Collections.Concurrent;
-using System.Globalization;
-using System.Linq;
-using System.Reflection;
-using CryptoExchange.Net.Attributes;
-using Newtonsoft.Json;
-using Newtonsoft.Json.Linq;
-
-namespace CryptoExchange.Net.Converters.JsonNet
-{
-    /// <summary>
-    /// Converter for arrays to objects. Can deserialize data like [0.1, 0.2, "test"] to an object. Mapping is done by marking the class with [JsonConverter(typeof(ArrayConverter))] and the properties
-    /// with [ArrayProperty(x)] where x is the index of the property in the array
-    /// </summary>
-    public class ArrayConverter : JsonConverter
-    {
-        private static readonly ConcurrentDictionary<(MemberInfo, Type), Attribute> _attributeByMemberInfoAndTypeCache = new ConcurrentDictionary<(MemberInfo, Type), Attribute>();
-        private static readonly ConcurrentDictionary<(Type, Type), Attribute> _attributeByTypeAndTypeCache = new ConcurrentDictionary<(Type, Type), Attribute>();
-
-        /// <inheritdoc />
-        public override bool CanConvert(Type objectType)
-        {
-            return true;
-        }
-        
-        /// <inheritdoc />
-        public override object? ReadJson(JsonReader reader, Type objectType, object? existingValue, JsonSerializer serializer)
-        {
-            if (reader.TokenType == JsonToken.Null)
-                return null;
-
-            if (objectType == typeof(JToken))
-                return JToken.Load(reader);
-
-            var result = Activator.CreateInstance(objectType);
-            var arr = JArray.Load(reader);
-            return ParseObject(arr, result, objectType);
-        }
-
-        private static object ParseObject(JArray arr, object result, Type objectType)
-        {
-            foreach (var property in objectType.GetProperties())
-            {
-                var attribute = GetCustomAttribute<ArrayPropertyAttribute>(property);
-
-                if (attribute == null)
-                    continue;
-
-                if (attribute.Index >= arr.Count)
-                    continue;
-
-                if (property.PropertyType.BaseType == typeof(Array))
-                {
-                    var objType = property.PropertyType.GetElementType();
-                    var innerArray = (JArray)arr[attribute.Index];
-                    var count = 0;
-                    if (innerArray.Count == 0)
-                    {
-                        var arrayResult = (IList)Activator.CreateInstance(property.PropertyType, new [] { 0 });
-                        property.SetValue(result, arrayResult);
-                    }
-                    else if (innerArray[0].Type == JTokenType.Array)
-                    {
-                        var arrayResult = (IList)Activator.CreateInstance(property.PropertyType, new [] { innerArray.Count });
-                        foreach (var obj in innerArray)
-                        {
-                            var innerObj = Activator.CreateInstance(objType!);
-                            arrayResult[count] = ParseObject((JArray)obj, innerObj, objType!);
-                            count++;
-                        }
-                        property.SetValue(result, arrayResult);
-                    }
-                    else
-                    {
-                        var arrayResult = (IList)Activator.CreateInstance(property.PropertyType, new [] { 1 });
-                        var innerObj = Activator.CreateInstance(objType!);
-                        arrayResult[0] = ParseObject(innerArray, innerObj, objType!);
-                        property.SetValue(result, arrayResult);
-                    }
-                    continue;
-                }
-
-                var converterAttribute = GetCustomAttribute<JsonConverterAttribute>(property) ?? GetCustomAttribute<JsonConverterAttribute>(property.PropertyType);
-                var conversionAttribute = GetCustomAttribute<JsonConversionAttribute>(property) ?? GetCustomAttribute<JsonConversionAttribute>(property.PropertyType);
-
-                object? value;
-                if (converterAttribute != null)
-                {
-                    value = arr[attribute.Index].ToObject(property.PropertyType, new JsonSerializer {Converters = {(JsonConverter) Activator.CreateInstance(converterAttribute.ConverterType)}});
-                }
-                else if (conversionAttribute != null)
-                {
-                    value = arr[attribute.Index].ToObject(property.PropertyType);
-                }
-                else
-                {
-                    value = arr[attribute.Index];
-                }
-
-                if (value != null && property.PropertyType.IsInstanceOfType(value))
-                {
-                    property.SetValue(result, value);
-                }
-                else
-                {
-                    if (value is JToken token)
-                    {
-                        if (token.Type == JTokenType.Null)
-                            value = null;
-
-                        if (token.Type == JTokenType.Float)
-                            value = token.Value<decimal>();
-                    }
-
-                    if (value is decimal)
-                    {
-                        property.SetValue(result, value);
-                    }
-                    else if ((property.PropertyType == typeof(decimal)
-                     || property.PropertyType == typeof(decimal?))
-                     && (value != null && value.ToString().IndexOf("e", StringComparison.OrdinalIgnoreCase) >= 0))
-                    {
-                        var v = value.ToString();
-                        if (decimal.TryParse(v, NumberStyles.Float, CultureInfo.InvariantCulture, out var dec))
-                            property.SetValue(result, dec);
-                    }
-                    else
-                    {
-                        property.SetValue(result, value == null ? null : Convert.ChangeType(value, property.PropertyType));
-                    }
-                }
-            }
-            return result;
-        }
-
-        /// <inheritdoc />
-        public override void WriteJson(JsonWriter writer, object? value, JsonSerializer serializer)
-        {
-            if (value == null)
-                return;
-
-            writer.WriteStartArray();
-            var props = value.GetType().GetProperties();
-            var ordered = props.OrderBy(p => GetCustomAttribute<ArrayPropertyAttribute>(p)?.Index);
-
-            var last = -1;
-            foreach (var prop in ordered)
-            {
-                var arrayProp = GetCustomAttribute<ArrayPropertyAttribute>(prop);
-                if (arrayProp == null)
-                    continue;
-
-                if (arrayProp.Index == last)
-                    continue;
-
-                while (arrayProp.Index != last + 1)
-                {
-                    writer.WriteValue((string?)null);
-                    last += 1;
-                }
-
-                last = arrayProp.Index;
-                var converterAttribute = GetCustomAttribute<JsonConverterAttribute>(prop);
-                if (converterAttribute != null)
-                    writer.WriteRawValue(JsonConvert.SerializeObject(prop.GetValue(value), (JsonConverter)Activator.CreateInstance(converterAttribute.ConverterType)));
-                else if (!IsSimple(prop.PropertyType))
-                    serializer.Serialize(writer, prop.GetValue(value));
-                else
-                    writer.WriteValue(prop.GetValue(value));
-            }
-            writer.WriteEndArray();
-        }
-
-        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);
-        }
-
-        private static T? GetCustomAttribute<T>(MemberInfo memberInfo) where T : Attribute =>
-            (T?)_attributeByMemberInfoAndTypeCache.GetOrAdd((memberInfo, typeof(T)), tuple => memberInfo.GetCustomAttribute(typeof(T)));
-
-        private static T? GetCustomAttribute<T>(Type type) where T : Attribute =>
-            (T?)_attributeByTypeAndTypeCache.GetOrAdd((type, typeof(T)), tuple => type.GetCustomAttribute(typeof(T)));
-    }
-}

CryptoExchange.Net/Converters/JsonNet/BaseConverter.cs

@@ -1,98 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Diagnostics;
-using System.Linq;
-using Newtonsoft.Json;
-
-namespace CryptoExchange.Net.Converters.JsonNet
-{
-    /// <summary>
-    /// Base class for enum converters
-    /// </summary>
-    /// <typeparam name="T">Type of enum to convert</typeparam>
-    public abstract class BaseConverter<T>: JsonConverter where T: struct
-    {
-        /// <summary>
-        /// The enum->string mapping
-        /// </summary>
-        protected abstract List<KeyValuePair<T, string>> Mapping { get; }
-        private readonly bool _quotes;
-        
-        /// <summary>
-        /// ctor
-        /// </summary>
-        /// <param name="useQuotes"></param>
-        protected BaseConverter(bool useQuotes)
-        {
-            _quotes = useQuotes;
-        }
-
-        /// <inheritdoc />
-        public override void WriteJson(JsonWriter writer, object? value, JsonSerializer serializer)
-        {
-            var stringValue = value == null? null: GetValue((T) value);
-            if (_quotes)
-                writer.WriteValue(stringValue);
-            else
-                writer.WriteRawValue(stringValue);
-        }
-
-        /// <inheritdoc />
-        public override object? ReadJson(JsonReader reader, Type objectType, object? existingValue, JsonSerializer serializer)
-        {
-            if (reader.Value == null)
-                return null;
-
-            var stringValue = reader.Value.ToString();
-            if (string.IsNullOrWhiteSpace(stringValue))
-                return null;
-
-            if (!GetValue(stringValue, out var result))
-            {
-                Trace.WriteLine($"{DateTime.Now:yyyy/MM/dd HH:mm:ss:fff} | Warning | Cannot map enum value. EnumType: {typeof(T)}, Value: {reader.Value}, Known values: {string.Join(", ", Mapping.Select(m => m.Value))}. If you think {reader.Value} should added please open an issue on the Github repo");
-                return null;
-            }
-
-            return result;
-        }
-
-        /// <summary>
-        /// Convert a string value
-        /// </summary>
-        /// <param name="data"></param>
-        /// <returns></returns>
-        public T ReadString(string data)
-        {
-            return Mapping.FirstOrDefault(v => v.Value == data).Key;
-        }
-
-        /// <inheritdoc />
-        public override bool CanConvert(Type objectType)
-        {
-            // Check if it is type, or nullable of type
-            return objectType == typeof(T) || Nullable.GetUnderlyingType(objectType) == typeof(T);
-        }
-
-        private bool GetValue(string value, out T result)
-        {
-            // Check for exact match first, then if not found fallback to a case insensitive match 
-            var mapping = Mapping.FirstOrDefault(kv => kv.Value.Equals(value, StringComparison.InvariantCulture));
-            if(mapping.Equals(default(KeyValuePair<T, string>)))
-                mapping = Mapping.FirstOrDefault(kv => kv.Value.Equals(value, StringComparison.InvariantCultureIgnoreCase));
-
-            if (!mapping.Equals(default(KeyValuePair<T, string>)))
-            {
-                result = mapping.Key;
-                return true;
-            }
-
-            result = default;
-            return false;
-        }
-
-        private string GetValue(T value)
-        {
-            return Mapping.FirstOrDefault(v => v.Key.Equals(value)).Value;
-        }
-    }
-}

CryptoExchange.Net/Converters/JsonNet/BigDecimalConverter.cs

@@ -1,62 +0,0 @@
-using System;
-using System.Globalization;
-using Newtonsoft.Json;
-
-namespace CryptoExchange.Net.Converters.JsonNet
-{
-    /// <summary>
-    /// Decimal converter that handles overflowing decimal values (by setting it to decimal.MaxValue)
-    /// </summary>
-    public class BigDecimalConverter : JsonConverter
-    {
-        /// <inheritdoc />
-        public override bool CanConvert(Type objectType)
-        {
-            if (Nullable.GetUnderlyingType(objectType) != null)
-                return Nullable.GetUnderlyingType(objectType) == typeof(decimal);
-            return objectType == typeof(decimal);
-        }
-
-        /// <inheritdoc />
-        public override object? ReadJson(JsonReader reader, Type objectType, object? existingValue, JsonSerializer serializer)
-        {
-            if (reader.TokenType == JsonToken.Null)
-                return null;
-
-            if (reader.TokenType == JsonToken.Float || reader.TokenType == JsonToken.Integer)
-            {
-                try
-                {
-                    return decimal.Parse(reader.Value!.ToString(), NumberStyles.Float, CultureInfo.InvariantCulture);
-                }
-                catch (OverflowException) 
-                {
-                    // Value doesn't fit decimal; set it to max value
-                    return decimal.MaxValue;
-                }
-            }
-
-            if (reader.TokenType == JsonToken.String)
-            {
-                try
-                {
-                    var value = reader.Value!.ToString();
-                    return decimal.Parse(value, NumberStyles.Float, CultureInfo.InvariantCulture);
-                }
-                catch (OverflowException)
-                {
-                    // Value doesn't fit decimal; set it to max value
-                    return decimal.MaxValue;
-                }
-            }
-
-            return null;
-        }
-
-        /// <inheritdoc />
-        public override void WriteJson(JsonWriter writer, object? value, JsonSerializer serializer)
-        {
-            writer.WriteValue(value);
-        }
-    }
-}

CryptoExchange.Net/Converters/JsonNet/BoolConverter.cs

@@ -1,80 +0,0 @@
-using System;
-using Newtonsoft.Json;
-
-namespace CryptoExchange.Net.Converters.JsonNet
-{
-    /// <summary>
-    /// Boolean converter with support for "0"/"1" (strings)
-    /// </summary>
-    public class BoolConverter : JsonConverter
-    {
-        /// <summary>
-        /// Determines whether this instance can convert the specified object type.
-        /// </summary>
-        /// <param name="objectType">Type of the object.</param>
-        /// <returns>
-        /// <c>true</c> if this instance can convert the specified object type; otherwise, <c>false</c>.
-        /// </returns>
-        public override bool CanConvert(Type objectType)
-        {
-            if (Nullable.GetUnderlyingType(objectType) != null)
-                return Nullable.GetUnderlyingType(objectType) == typeof(bool);
-            return objectType == typeof(bool);
-        }
-
-        /// <summary>
-        /// Reads the JSON representation of the object.
-        /// </summary>
-        /// <param name="reader">The <see cref="T:Newtonsoft.Json.JsonReader"/> to read from.</param>
-        /// <param name="objectType">Type of the object.</param>
-        /// <param name="existingValue">The existing value of object being read.</param>
-        /// <param name="serializer">The calling serializer.</param>
-        /// <returns>
-        /// The object value.
-        /// </returns>
-        public override object? ReadJson(JsonReader reader, Type objectType, object? existingValue, JsonSerializer serializer)
-        {
-            var value = reader.Value?.ToString().ToLower().Trim();
-            if (value == null || value == "")
-            {
-                if (Nullable.GetUnderlyingType(objectType) != null)
-                    return null;
-
-                return false;
-            }
-
-            switch (value)
-            {
-                case "true":
-                case "yes":
-                case "y":
-                case "1":
-                case "on":
-                    return true;
-                case "false":
-                case "no":
-                case "n":
-                case "0":
-                case "off":
-                case "-1":
-                    return false;
-            }
-
-            // If we reach here, we're pretty much going to throw an error so let's let Json.NET throw it's pretty-fied error message.
-            return new JsonSerializer().Deserialize(reader, objectType);
-        }
-
-        /// <summary>
-        /// Specifies that this converter will not participate in writing results.
-        /// </summary>
-        public override bool CanWrite { get { return false; } }
-
-        /// <summary>
-        /// Writes the JSON representation of the object.
-        /// </summary>
-        /// <param name="writer">The <see cref="T:Newtonsoft.Json.JsonWriter"/> to write to.</param><param name="value">The value.</param><param name="serializer">The calling serializer.</param>
-        public override void WriteJson(JsonWriter writer, object? value, JsonSerializer serializer)
-        {
-        }
-    }
-}

CryptoExchange.Net/Converters/JsonNet/DateTimeConverter.cs

@@ -1,240 +0,0 @@
-using Newtonsoft.Json;
-using System;
-using System.Diagnostics;
-using System.Diagnostics.CodeAnalysis;
-using System.Globalization;
-
-namespace CryptoExchange.Net.Converters.JsonNet
-{
-    /// <summary>
-    /// Datetime converter. Supports converting from string/long/double to DateTime and back. Numbers are assumed to be the time since 1970-01-01.
-    /// </summary>
-    public class DateTimeConverter: JsonConverter
-    {
-        private static readonly DateTime _epoch = new(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
-        private const long _ticksPerSecond = TimeSpan.TicksPerMillisecond * 1000;
-        private const decimal _ticksPerMicrosecond = TimeSpan.TicksPerMillisecond / 1000;
-        private const decimal _ticksPerNanosecond = TimeSpan.TicksPerMillisecond / 1000m / 1000;
-
-        /// <inheritdoc />
-        public override bool CanConvert(Type objectType)
-        {
-            return objectType == typeof(DateTime) || objectType == typeof(DateTime?);
-        }
-
-        /// <inheritdoc />
-        public override object? ReadJson(JsonReader reader, Type objectType, object? existingValue, JsonSerializer serializer)
-        {
-            if (reader.Value == null)
-            {
-                if (objectType == typeof(DateTime))
-                    return default(DateTime);
-
-                return null;
-            }
-
-            if(reader.TokenType is JsonToken.Integer)
-            {
-                var longValue = (long)reader.Value;
-                if (longValue == 0 || longValue == -1)
-                    return objectType == typeof(DateTime) ? default(DateTime): null;
-
-                return ParseFromLong(longValue);
-            }
-            else if (reader.TokenType is JsonToken.Float)
-            {
-                var doubleValue = (double)reader.Value;
-                if (doubleValue == 0 || doubleValue == -1)
-                    return objectType == typeof(DateTime) ? default(DateTime) : null;
-
-                if (doubleValue < 19999999999)
-                    return ConvertFromSeconds(doubleValue);
-                
-                return ConvertFromMilliseconds(doubleValue);
-            }
-            else if(reader.TokenType is JsonToken.String)
-            {
-                var stringValue = (string)reader.Value;
-                if (string.IsNullOrWhiteSpace(stringValue)
-                    || stringValue == "-1"
-                    || (double.TryParse(stringValue, out var doubleVal) && doubleVal == 0))
-                {
-                    return objectType == typeof(DateTime) ? default(DateTime) : null;
-                }
-
-                return ParseFromString(stringValue);
-            }
-            else if(reader.TokenType == JsonToken.Date)
-            {
-                return (DateTime)reader.Value;
-            }
-            else
-            {
-                Trace.WriteLine("{DateTime.Now:yyyy/MM/dd HH:mm:ss:fff} | Warning | Unknown DateTime format: " + reader.Value);
-                return default;
-            }
-        }
-
-        /// <summary>
-        /// Parse a long value to datetime
-        /// </summary>
-        /// <param name="longValue"></param>
-        /// <returns></returns>
-        public static DateTime ParseFromLong(long longValue)
-        {
-            if (longValue < 19999999999)
-                return ConvertFromSeconds(longValue);
-            if (longValue < 19999999999999)
-                return ConvertFromMilliseconds(longValue);
-            if (longValue < 19999999999999999)
-                return ConvertFromMicroseconds(longValue);
-
-            return ConvertFromNanoseconds(longValue);
-        }
-
-        /// <summary>
-        /// Parse a string value to datetime
-        /// </summary>
-        /// <param name="stringValue"></param>
-        /// <returns></returns>
-        public static DateTime ParseFromString(string stringValue)
-        {
-            if (stringValue.Length == 12 && stringValue.StartsWith("202"))
-            {
-                // Parse 202303261200 format
-                if (!int.TryParse(stringValue.Substring(0, 4), out var year)
-                    || !int.TryParse(stringValue.Substring(4, 2), out var month)
-                    || !int.TryParse(stringValue.Substring(6, 2), out var day)
-                    || !int.TryParse(stringValue.Substring(8, 2), out var hour)
-                    || !int.TryParse(stringValue.Substring(10, 2), out var minute))
-                {
-                    Trace.WriteLine($"{DateTime.Now:yyyy/MM/dd HH:mm:ss:fff} | Warning | Unknown DateTime format: " + stringValue);
-                    return default;
-                }
-                return new DateTime(year, month, day, hour, minute, 0, DateTimeKind.Utc);
-            }
-
-            if (stringValue.Length == 8)
-            {
-                // Parse 20211103 format
-                if (!int.TryParse(stringValue.Substring(0, 4), out var year)
-                    || !int.TryParse(stringValue.Substring(4, 2), out var month)
-                    || !int.TryParse(stringValue.Substring(6, 2), out var day))
-                {
-                    Trace.WriteLine($"{DateTime.Now:yyyy/MM/dd HH:mm:ss:fff} | Warning | Unknown DateTime format: " + stringValue);
-                    return default;
-                }
-                return new DateTime(year, month, day, 0, 0, 0, DateTimeKind.Utc);
-            }
-
-            if (stringValue.Length == 6)
-            {
-                // Parse 211103 format
-                if (!int.TryParse(stringValue.Substring(0, 2), out var year)
-                    || !int.TryParse(stringValue.Substring(2, 2), out var month)
-                    || !int.TryParse(stringValue.Substring(4, 2), out var day))
-                {
-                    Trace.WriteLine("{DateTime.Now:yyyy/MM/dd HH:mm:ss:fff} | Warning | Unknown DateTime format: " + stringValue);
-                    return default;
-                }
-                return new DateTime(year + 2000, month, day, 0, 0, 0, DateTimeKind.Utc);
-            }
-
-            if (double.TryParse(stringValue, NumberStyles.Float, CultureInfo.InvariantCulture, out var doubleValue))
-            {
-                // Parse 1637745563.000 format
-                if (doubleValue < 19999999999)
-                    return ConvertFromSeconds(doubleValue);
-                if (doubleValue < 19999999999999)
-                    return ConvertFromMilliseconds((long)doubleValue);
-                if (doubleValue < 19999999999999999)
-                    return ConvertFromMicroseconds((long)doubleValue);
-
-                return ConvertFromNanoseconds((long)doubleValue);
-            }
-
-            if (stringValue.Length == 10)
-            {
-                // Parse 2021-11-03 format
-                var values = stringValue.Split('-');
-                if (!int.TryParse(values[0], out var year)
-                    || !int.TryParse(values[1], out var month)
-                    || !int.TryParse(values[2], out var day))
-                {
-                    Trace.WriteLine("{DateTime.Now:yyyy/MM/dd HH:mm:ss:fff} | Warning | Unknown DateTime format: " + stringValue);
-                    return default;
-                }
-
-                return new DateTime(year, month, day, 0, 0, 0, DateTimeKind.Utc);
-            }
-
-            return DateTime.Parse(stringValue, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal);
-        }
-
-        /// <summary>
-        /// Convert a seconds since epoch (01-01-1970) value to DateTime
-        /// </summary>
-        /// <param name="seconds"></param>
-        /// <returns></returns>
-        public static DateTime ConvertFromSeconds(double seconds) => _epoch.AddTicks((long)Math.Round(seconds * _ticksPerSecond));
-        /// <summary>
-        /// Convert a milliseconds since epoch (01-01-1970) value to DateTime
-        /// </summary>
-        /// <param name="milliseconds"></param>
-        /// <returns></returns>
-        public static DateTime ConvertFromMilliseconds(double milliseconds) => _epoch.AddTicks((long)Math.Round(milliseconds * TimeSpan.TicksPerMillisecond));
-        /// <summary>
-        /// Convert a microseconds since epoch (01-01-1970) value to DateTime
-        /// </summary>
-        /// <param name="microseconds"></param>
-        /// <returns></returns>
-        public static DateTime ConvertFromMicroseconds(long microseconds) => _epoch.AddTicks((long)Math.Round(microseconds * _ticksPerMicrosecond));
-        /// <summary>
-        /// Convert a nanoseconds since epoch (01-01-1970) value to DateTime
-        /// </summary>
-        /// <param name="nanoseconds"></param>
-        /// <returns></returns>
-        public static DateTime ConvertFromNanoseconds(long nanoseconds) => _epoch.AddTicks((long)Math.Round(nanoseconds * _ticksPerNanosecond));
-        /// <summary>
-        /// Convert a DateTime value to seconds since epoch (01-01-1970) value
-        /// </summary>
-        /// <param name="time"></param>
-        /// <returns></returns>
-        [return: NotNullIfNotNull("time")]
-        public static long? ConvertToSeconds(DateTime? time) => time == null ? null: (long)Math.Round((time.Value - _epoch).TotalSeconds);
-        /// <summary>
-        /// Convert a DateTime value to milliseconds since epoch (01-01-1970) value
-        /// </summary>
-        /// <param name="time"></param>
-        /// <returns></returns>
-        [return: NotNullIfNotNull("time")]
-        public static long? ConvertToMilliseconds(DateTime? time) => time == null ? null : (long)Math.Round((time.Value - _epoch).TotalMilliseconds);
-        /// <summary>
-        /// Convert a DateTime value to microseconds since epoch (01-01-1970) value
-        /// </summary>
-        /// <param name="time"></param>
-        /// <returns></returns>
-        [return: NotNullIfNotNull("time")]
-        public static long? ConvertToMicroseconds(DateTime? time) => time == null ? null : (long)Math.Round((time.Value - _epoch).Ticks / _ticksPerMicrosecond);
-        /// <summary>
-        /// Convert a DateTime value to nanoseconds since epoch (01-01-1970) value
-        /// </summary>
-        /// <param name="time"></param>
-        /// <returns></returns>
-        [return: NotNullIfNotNull("time")]
-        public static long? ConvertToNanoseconds(DateTime? time) => time == null ? null : (long)Math.Round((time.Value - _epoch).Ticks / _ticksPerNanosecond);
-
-
-        /// <inheritdoc />
-        public override void WriteJson(JsonWriter writer, object? value, JsonSerializer serializer)
-        {
-            var datetimeValue = (DateTime?)value;
-            if (datetimeValue == null)
-                writer.WriteValue((DateTime?)null);
-            if(datetimeValue == default(DateTime))
-                writer.WriteValue((DateTime?)null);
-            else
-                writer.WriteValue((long)Math.Round(((DateTime)value! - new DateTime(1970, 1, 1)).TotalMilliseconds));
-        }
-    }
-}

CryptoExchange.Net/Converters/JsonNet/DecimalStringWriterConverter.cs

@@ -1,27 +0,0 @@
-using Newtonsoft.Json;
-using System;
-using System.Globalization;
-
-namespace CryptoExchange.Net.Converters.JsonNet
-{
-    /// <summary>
-    /// Converter for serializing decimal values as string
-    /// </summary>
-    public class DecimalStringWriterConverter : JsonConverter
-    {
-        /// <inheritdoc />
-        public override bool CanRead => false;
-
-        /// <inheritdoc />
-        public override bool CanConvert(Type objectType) => objectType == typeof(decimal) || objectType == typeof(decimal?);
-
-        /// <inheritdoc />
-        public override object? ReadJson(JsonReader reader, Type objectType, object? existingValue, JsonSerializer serializer)
-        {
-            throw new NotImplementedException();
-        }
-
-        /// <inheritdoc />
-        public override void WriteJson(JsonWriter writer, object? value, JsonSerializer serializer) => writer.WriteValue(((decimal?)value)?.ToString(CultureInfo.InvariantCulture) ?? null);
-    }
-}

CryptoExchange.Net/Converters/JsonNet/EnumConverter.cs

@@ -1,176 +0,0 @@
-using CryptoExchange.Net.Attributes;
-using Newtonsoft.Json;
-using System;
-using System.Collections.Concurrent;
-using System.Collections.Generic;
-using System.Diagnostics;
-using System.Diagnostics.CodeAnalysis;
-using System.Linq;
-
-namespace CryptoExchange.Net.Converters.JsonNet
-{
-    /// <summary>
-    /// Converter for enum values. Enums entries should be noted with a MapAttribute to map the enum value to a string value
-    /// </summary>
-    public class EnumConverter : JsonConverter
-    {
-        private bool _warnOnMissingEntry = true;
-        private bool _writeAsInt;
-
-        /// <summary>
-        /// </summary>
-        public EnumConverter() { }
-
-        /// <summary>
-        /// </summary>
-        /// <param name="writeAsInt"></param>
-        /// <param name="warnOnMissingEntry"></param>
-        public EnumConverter(bool writeAsInt, bool warnOnMissingEntry)
-        {
-            _writeAsInt = writeAsInt;
-            _warnOnMissingEntry = warnOnMissingEntry;
-        }   
-
-        private static readonly ConcurrentDictionary<Type, List<KeyValuePair<object, string>>> _mapping = new();
-
-        /// <inheritdoc />
-        public override bool CanConvert(Type objectType)
-        {
-            return objectType.IsEnum || Nullable.GetUnderlyingType(objectType)?.IsEnum == true;
-        }
-
-        /// <inheritdoc />
-        public override object? ReadJson(JsonReader reader, Type objectType, object? existingValue, JsonSerializer serializer)
-        {
-            var enumType = Nullable.GetUnderlyingType(objectType) ?? objectType;
-            if (!_mapping.TryGetValue(enumType, out var mapping))
-                mapping = AddMapping(enumType);
-
-            var stringValue = reader.Value?.ToString();
-            if (stringValue == null || stringValue == "")
-            {
-                // Received null value
-                var emptyResult = GetDefaultValue(objectType, enumType);
-                if(emptyResult != null)
-                    // If the property we're parsing to isn't nullable there isn't a correct way to return this as null will either throw an exception (.net framework) or the default enum value (dotnet core).
-                    Trace.WriteLine($"{DateTime.Now:yyyy/MM/dd HH:mm:ss:fff} | Warning | Received null enum value, but property type is not a nullable enum. EnumType: {enumType.Name}. If you think {enumType.Name} should be nullable please open an issue on the Github repo");
-
-                return emptyResult;
-            }
-
-            if (!GetValue(enumType, mapping, stringValue!, out var result))
-            {
-                var defaultValue = GetDefaultValue(objectType, enumType);
-                if (string.IsNullOrWhiteSpace(stringValue))
-                {
-                    if (defaultValue != null)
-                        // We received an empty string and have no mapping for it, and the property isn't nullable
-                        Trace.WriteLine($"{DateTime.Now:yyyy/MM/dd HH:mm:ss:fff} | Warning | Received empty string as enum value, but property type is not a nullable enum. EnumType: {enumType.Name}. If you think {enumType.Name} should be nullable please open an issue on the Github repo");
-                }
-                else
-                {
-                    // We received an enum value but weren't able to parse it.
-                    if (_warnOnMissingEntry)
-                        Trace.WriteLine($"{DateTime.Now:yyyy/MM/dd HH:mm:ss:fff} | Warning | Cannot map enum value. EnumType: {enumType.Name}, Value: {reader.Value}, Known values: {string.Join(", ", mapping.Select(m => m.Value))}. If you think {reader.Value} should added please open an issue on the Github repo");
-                }
-            
-                return defaultValue;
-            }
-
-            return result;
-        }
-
-        private static object? GetDefaultValue(Type objectType, Type enumType)
-        {
-            if (Nullable.GetUnderlyingType(objectType) != null)
-                return null;
-
-            return Activator.CreateInstance(enumType); // return default value
-        }
-
-        private static List<KeyValuePair<object, string>> AddMapping(Type objectType) 
-        {
-            var mapping = new List<KeyValuePair<object, string>>();
-            var enumMembers = objectType.GetMembers();
-            foreach (var member in enumMembers)
-            {
-                var maps = member.GetCustomAttributes(typeof(MapAttribute), false);
-                foreach (MapAttribute attribute in maps)
-                {
-                    foreach (var value in attribute.Values)
-                        mapping.Add(new KeyValuePair<object, string>(Enum.Parse(objectType, member.Name), value));
-                }
-            }
-            _mapping.TryAdd(objectType, mapping);
-            return mapping;
-        }
-
-        private static bool GetValue(Type objectType, List<KeyValuePair<object, string>> enumMapping, string value, out object? result)
-        {
-            // Check for exact match first, then if not found fallback to a case insensitive match 
-            var mapping = enumMapping.FirstOrDefault(kv => kv.Value.Equals(value, StringComparison.InvariantCulture));
-            if (mapping.Equals(default(KeyValuePair<object, string>)))
-                mapping = enumMapping.FirstOrDefault(kv => kv.Value.Equals(value, StringComparison.InvariantCultureIgnoreCase));
-
-            if (!mapping.Equals(default(KeyValuePair<object, string>)))
-            {
-                result = mapping.Key;
-                return true;
-            }
-
-            try
-            {
-                // If no explicit mapping is found try to parse string
-                result = Enum.Parse(objectType, value, true);
-                return true;
-            }
-            catch (Exception)
-            {
-                result = default;
-                return false;
-            }
-        }
-
-        /// <summary>
-        /// Get the string value for an enum value using the MapAttribute mapping. When multiple values are mapped for a enum entry the first value will be returned
-        /// </summary>
-        /// <typeparam name="T"></typeparam>
-        /// <param name="enumValue"></param>
-        /// <returns></returns>
-        [return: NotNullIfNotNull("enumValue")]
-        public static string? GetString<T>(T enumValue) => GetString(typeof(T), enumValue);     
-        
-
-        [return: NotNullIfNotNull("enumValue")]
-        private static string? GetString(Type objectType, object? enumValue)
-        {
-            objectType = Nullable.GetUnderlyingType(objectType) ?? objectType;
-
-            if (!_mapping.TryGetValue(objectType, out var mapping))
-                mapping = AddMapping(objectType);
-
-            return enumValue == null ? null : (mapping.FirstOrDefault(v => v.Key.Equals(enumValue)).Value ?? enumValue.ToString());
-        }
-
-        /// <inheritdoc />
-        public override void WriteJson(JsonWriter writer, object? value, JsonSerializer serializer)
-        {
-            if (value == null)
-            {
-                writer.WriteNull();
-            }
-            else
-            {
-                if (!_writeAsInt)
-                {
-                    var stringValue = GetString(value.GetType(), value);
-                    writer.WriteValue(stringValue);
-                }
-                else
-                {
-                    writer.WriteValue((int)value);
-                }
-            }
-        }
-    }
-}

CryptoExchange.Net/Converters/JsonNet/JsonNetMessageAccessor.cs

@@ -1,338 +0,0 @@
-using CryptoExchange.Net.Converters.MessageParsing;
-using CryptoExchange.Net.Interfaces;
-using CryptoExchange.Net.Objects;
-using Newtonsoft.Json;
-using Newtonsoft.Json.Linq;
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
-using System.Runtime.InteropServices;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace CryptoExchange.Net.Converters.JsonNet
-{
-    /// <summary>
-    /// Json.Net message accessor
-    /// </summary>
-    public abstract class JsonNetMessageAccessor : IMessageAccessor
-    {
-        /// <summary>
-        /// The json token loaded
-        /// </summary>
-        protected JToken? _token;
-        private static readonly JsonSerializer _serializer = JsonSerializer.Create(SerializerOptions.WithConverters);
-
-        /// <inheritdoc />
-        public bool IsJson { get; protected set; }
-
-        /// <inheritdoc />
-        public abstract bool OriginalDataAvailable { get; }
-
-        /// <inheritdoc />
-        public object? Underlying => _token;
-
-        /// <inheritdoc />
-        public CallResult<object> Deserialize(Type type, MessagePath? path = null)
-        {
-            if (!IsJson)
-                return new CallResult<object>(GetOriginalString());
-
-            var source = _token;
-            if (path != null)
-                source = GetPathNode(path.Value);
-
-            try
-            {
-                var result = source!.ToObject(type, _serializer)!;
-                return new CallResult<object>(result);
-            }
-            catch (JsonReaderException jre)
-            {
-                var info = $"Deserialize JsonReaderException: {jre.Message}, Path: {jre.Path}, LineNumber: {jre.LineNumber}, LinePosition: {jre.LinePosition}";
-                return new CallResult<object>(new DeserializeError(info, OriginalDataAvailable ? GetOriginalString() : "[Data only available when OutputOriginal = true in client options]"));
-            }
-            catch (JsonSerializationException jse)
-            {
-                var info = $"Deserialize JsonSerializationException: {jse.Message}";
-                return new CallResult<object>(new DeserializeError(info, OriginalDataAvailable ? GetOriginalString() : "[Data only available when OutputOriginal = true in client options]"));
-            }
-            catch (Exception ex)
-            {
-                var exceptionInfo = ex.ToLogString();
-                var info = $"Deserialize Unknown Exception: {exceptionInfo}";
-                return new CallResult<object>(new DeserializeError(info, OriginalDataAvailable ? GetOriginalString() : "[Data only available when OutputOriginal = true in client options]"));
-            }
-        }
-
-        /// <inheritdoc />
-        public CallResult<T> Deserialize<T>(MessagePath? path = null)
-        {
-            var source = _token;
-            if (path != null)
-                source = GetPathNode(path.Value);
-
-            try
-            {
-                var result = source!.ToObject<T>(_serializer)!;
-                return new CallResult<T>(result);
-            }
-            catch (JsonReaderException jre)
-            {
-                var info = $"Deserialize JsonReaderException: {jre.Message}, Path: {jre.Path}, LineNumber: {jre.LineNumber}, LinePosition: {jre.LinePosition}";
-                return new CallResult<T>(new DeserializeError(info, OriginalDataAvailable ? GetOriginalString() : "[Data only available when OutputOriginal = true in client options]"));
-            }
-            catch (JsonSerializationException jse)
-            {
-                var info = $"Deserialize JsonSerializationException: {jse.Message}";
-                return new CallResult<T>(new DeserializeError(info, OriginalDataAvailable ? GetOriginalString() : "[Data only available when OutputOriginal = true in client options]"));
-            }
-            catch (Exception ex)
-            {
-                var exceptionInfo = ex.ToLogString();
-                var info = $"Deserialize Unknown Exception: {exceptionInfo}";
-                return new CallResult<T>(new DeserializeError(info, OriginalDataAvailable ? GetOriginalString() : "[Data only available when OutputOriginal = true in client options]"));
-            }
-        }
-
-        /// <inheritdoc />
-        public NodeType? GetNodeType()
-        {
-            if (!IsJson)
-                throw new InvalidOperationException("Can't access json data on non-json message");
-
-            if (_token == null)
-                return null;
-
-            if (_token.Type == JTokenType.Object)
-                return NodeType.Object;
-
-            if (_token.Type == JTokenType.Array)
-                return NodeType.Array;
-
-            return NodeType.Value;
-        }
-
-        /// <inheritdoc />
-        public NodeType? GetNodeType(MessagePath path)
-        {
-            if (!IsJson)
-                throw new InvalidOperationException("Can't access json data on non-json message");
-
-            var node = GetPathNode(path);
-            if (node == null)
-                return null;
-
-            if (node.Type == JTokenType.Object)
-                return NodeType.Object;
-
-            if (node.Type == JTokenType.Array)
-                return NodeType.Array;
-
-            return NodeType.Value;
-        }
-
-        /// <inheritdoc />
-        public T? GetValue<T>(MessagePath path)
-        {
-            if (!IsJson)
-                throw new InvalidOperationException("Can't access json data on non-json message");
-
-            var value = GetPathNode(path);
-            if (value == null)
-                return default;
-
-            if (value.Type == JTokenType.Object || value.Type == JTokenType.Array)
-                return default;
-
-            return value!.Value<T>();
-        }
-
-        /// <inheritdoc />
-        public List<T?>? GetValues<T>(MessagePath path)
-        {
-            if (!IsJson)
-                throw new InvalidOperationException("Can't access json data on non-json message");
-
-            var value = GetPathNode(path);
-            if (value == null)
-                return default;
-
-            if (value.Type == JTokenType.Object)
-                return default;
-
-            return value!.Values<T>().ToList();
-        }
-
-        private JToken? GetPathNode(MessagePath path)
-        {
-            if (!IsJson)
-                throw new InvalidOperationException("Can't access json data on non-json message");
-
-            var currentToken = _token;
-            foreach (var node in path)
-            {
-                if (node.Type == 0)
-                {
-                    // Int value
-                    var val = node.Index!.Value;
-                    if (currentToken!.Type != JTokenType.Array || ((JArray)currentToken).Count <= val)
-                        return null;
-
-                    currentToken = currentToken[val];
-                }
-                else if (node.Type == 1)
-                {
-                    // String value
-                    if (currentToken!.Type != JTokenType.Object)
-                        return null;
-
-                    currentToken = currentToken[node.Property!];
-                }
-                else
-                {
-                    // Property name
-                    if (currentToken!.Type != JTokenType.Object)
-                        return null;
-
-                    currentToken = (currentToken.First as JProperty)?.Name;
-                }
-
-                if (currentToken == null)
-                    return null;
-            }
-
-            return currentToken;
-        }
-
-        /// <inheritdoc />
-        public abstract string GetOriginalString();
-
-        /// <inheritdoc />
-        public abstract void Clear();
-    }
-
-    /// <summary>
-    /// Json.Net stream message accessor
-    /// </summary>
-    public class JsonNetStreamMessageAccessor : JsonNetMessageAccessor, IStreamMessageAccessor
-    {
-        private Stream? _stream;
-
-        /// <inheritdoc />
-        public override bool OriginalDataAvailable => _stream?.CanSeek == true;
-
-        /// <inheritdoc />
-        public async 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
-            }
-
-            var readStream = _stream ?? stream;
-            var length = readStream.CanSeek ? readStream.Length : 4096;
-            using var reader = new StreamReader(readStream, Encoding.UTF8, false, (int)Math.Max(2, length), true);
-            using var jsonTextReader = new JsonTextReader(reader);
-
-            try
-            {
-                _token = await JToken.LoadAsync(jsonTextReader).ConfigureAwait(false);
-                IsJson = true;
-                return new CallResult(null);
-            }
-            catch (Exception ex)
-            {
-                // Not a json message
-                IsJson = false;
-                return new CallResult(new ServerError("JsonError: " + ex.Message));
-            }
-
-        }
-        /// <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;
-            _token = null;
-        }
-
-    }
-
-    /// <summary>
-    /// Json.Net byte message accessor
-    /// </summary>
-    public class JsonNetByteMessageAccessor : JsonNetMessageAccessor, IByteMessageAccessor
-    {
-        private ReadOnlyMemory<byte> _bytes;
-
-        /// <inheritdoc />
-        public CallResult Read(ReadOnlyMemory<byte> data)
-        {
-            _bytes = data;
-
-            // Try getting the underlying byte[] instead of the ToArray to prevent creating a copy
-            using var stream = MemoryMarshal.TryGetArray(data, out var arraySegment)
-                ? new MemoryStream(arraySegment.Array, arraySegment.Offset, arraySegment.Count)
-                : new MemoryStream(data.ToArray());
-            using var reader = new StreamReader(stream, Encoding.UTF8, false, Math.Max(2, data.Length), true);
-            using var jsonTextReader = new JsonTextReader(reader);
-
-            try
-            {
-                _token = JToken.Load(jsonTextReader);
-                IsJson = true;
-                return new CallResult(null);
-            }
-            catch (Exception ex)
-            {
-                // Not a json message
-                IsJson = false;
-                return new CallResult(new ServerError("JsonError: " + ex.Message));
-            }
-        }
-
-        /// <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;
-            _token = null;
-        }
-    }
-}

CryptoExchange.Net/Converters/JsonNet/JsonNetMessageSerializer.cs

@@ -1,12 +0,0 @@
-using CryptoExchange.Net.Interfaces;
-using Newtonsoft.Json;
-
-namespace CryptoExchange.Net.Converters.JsonNet
-{
-    /// <inheritdoc />
-    public class JsonNetMessageSerializer : IMessageSerializer
-    {
-        /// <inheritdoc />
-        public string Serialize(object message) => JsonConvert.SerializeObject(message, Formatting.None);
-    }
-}

CryptoExchange.Net/Converters/JsonNet/SerializerOptions.cs

@@ -1,35 +0,0 @@
-using Newtonsoft.Json;
-using System.Globalization;
-
-namespace CryptoExchange.Net.Converters.JsonNet
-{
-    /// <summary>
-    /// Serializer options
-    /// </summary>
-    public static class SerializerOptions
-    {
-        /// <summary>
-        /// Json serializer settings which includes the EnumConverter, DateTimeConverter and BoolConverter
-        /// </summary>
-        public static JsonSerializerSettings WithConverters => new JsonSerializerSettings
-        {
-            DateTimeZoneHandling = DateTimeZoneHandling.Utc,
-            Culture = CultureInfo.InvariantCulture,
-            Converters =
-            {
-                new EnumConverter(),
-                new DateTimeConverter(),
-                new BoolConverter()
-            }
-        };
-
-        /// <summary>
-        /// Default json serializer settings
-        /// </summary>
-        public static JsonSerializerSettings Default => new JsonSerializerSettings
-        {
-            DateTimeZoneHandling = DateTimeZoneHandling.Utc,
-            Culture = CultureInfo.InvariantCulture
-        };
-    }
-}

CryptoExchange.Net/Converters/JsonSerializerContextCache.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Concurrent;
+using System.Text.Json.Serialization;
+
+namespace CryptoExchange.Net.Converters
+{
+    /// <summary>
+    /// Caching for JsonSerializerContext instances
+    /// </summary>
+    public static class JsonSerializerContextCache
+    {
+        private static ConcurrentDictionary<Type, JsonSerializerContext> _cache = new ConcurrentDictionary<Type, JsonSerializerContext>();
+
+        /// <summary>
+        /// Get the instance of the provided type T. It will be created if it doesn't exist yet.
+        /// </summary>
+        /// <typeparam name="T">Implementation type of the JsonSerializerContext</typeparam>
+        public static JsonSerializerContext GetOrCreate<T>() where T: JsonSerializerContext, new()
+        {
+            var contextType = typeof(T);
+            if (_cache.TryGetValue(contextType, out var context))
+                return context;
+
+            var instance = new T();
+            _cache[contextType] = instance;
+            return instance;
+        }
+    }
+}

CryptoExchange.Net/Converters/MessageParsing/DynamicConverters/IRestMessageHandler.cs

@@ -0,0 +1,64 @@
+using CryptoExchange.Net.Objects;
+using System.IO;
+using System.Net.Http.Headers;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace CryptoExchange.Net.Converters.MessageParsing.DynamicConverters
+{
+    /// <summary>
+    /// REST message handler
+    /// </summary>
+    public interface IRestMessageHandler
+    {
+        /// <summary>
+        /// The `accept` HTTP response header for the request
+        /// </summary>
+        MediaTypeWithQualityHeaderValue AcceptHeader { get; }
+
+        /// <summary>
+        /// Whether a seekable stream is required
+        /// </summary>
+        bool RequiresSeekableStream { get; }
+
+        /// <summary>
+        /// Parse the response when the HTTP response status indicated an error
+        /// </summary>
+        ValueTask<Error> ParseErrorResponse(
+            int httpStatusCode,
+            HttpResponseHeaders responseHeaders,
+            Stream responseStream);
+
+        /// <summary>
+        /// Parse the response when the HTTP response status indicated a rate limit error
+        /// </summary>
+        ValueTask<ServerRateLimitError> ParseErrorRateLimitResponse(
+            int httpStatusCode,
+            HttpResponseHeaders responseHeaders,
+            Stream responseStream);
+
+        /// <summary>
+        /// Check if the response is an error response; if so return the error.<br />
+        /// Note that if the API returns a standard result wrapper, something like this:
+        /// <code>{ "code": 400, "msg": "error", "data": {} }</code> 
+        /// then the `CheckDeserializedResponse` method should be used for checking the result
+        /// </summary>
+        ValueTask<Error?> CheckForErrorResponse(
+            RequestDefinition request,
+            HttpResponseHeaders responseHeaders,
+            Stream responseStream);
+
+        /// <summary>
+        /// Deserialize the response stream
+        /// </summary>
+        ValueTask<(T? Result, Error? Error)> TryDeserializeAsync<T>(
+            Stream responseStream,
+            CancellationToken ct);
+
+        /// <summary>
+        /// Check whether the resulting T object indicates an error or not
+        /// </summary>
+        Error? CheckDeserializedResponse<T>(HttpResponseHeaders responseHeaders, T result);
+    }
+
+}

CryptoExchange.Net/Converters/MessageParsing/DynamicConverters/ISocketMessageHandler.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Net.WebSockets;
+
+namespace CryptoExchange.Net.Converters.MessageParsing.DynamicConverters
+{
+    /// <summary>
+    /// WebSocket message handler
+    /// </summary>
+    public interface ISocketMessageHandler
+    {
+        /// <summary>
+        /// Get an identifier for the message which can be used to determine the type of the message
+        /// </summary>
+        string? GetTypeIdentifier(ReadOnlySpan<byte> data, WebSocketMessageType? webSocketMessageType);
+
+        /// <summary>
+        /// Get optional topic filter, for example a symbol name
+        /// </summary>
+        string? GetTopicFilter(object deserializedObject);
+
+        /// <summary>
+        /// Deserialize to the provided type
+        /// </summary>
+        object Deserialize(ReadOnlySpan<byte> data, Type type);
+    }
+
+}

CryptoExchange.Net/Converters/MessageParsing/DynamicConverters/MessageConverterTypes.cs

@@ -0,0 +1,46 @@
+using System;
+
+namespace CryptoExchange.Net.Converters.MessageParsing.DynamicConverters
+{
+    /// <summary>
+    /// Message type definition
+    /// </summary>
+    public class MessageTypeDefinition
+    {
+        /// <summary>
+        /// Whether to immediately select the definition when it is matched. Can only be used when the evaluator has a single unique field to look for
+        /// </summary>
+        public bool ForceIfFound { get; set; }
+        /// <summary>
+        /// The fields a message needs to contain for this definition
+        /// </summary>
+        public MessageFieldReference[] Fields { get; set; } = [];
+        /// <summary>
+        /// The callback for getting the identifier string
+        /// </summary>
+        public Func<SearchResult, string>? TypeIdentifierCallback { get; set; }
+        /// <summary>
+        /// The static identifier string to return when this evaluator is matched
+        /// </summary>
+        public string? StaticIdentifier { get; set; }
+        
+        internal string? GetMessageType(SearchResult result)
+        {
+            if (StaticIdentifier != null)
+                return StaticIdentifier;
+
+            return TypeIdentifierCallback!(result);
+        }
+
+        internal bool Satisfied(SearchResult result)
+        {
+            foreach(var field in Fields)
+            {
+                if (!result.Contains(field))
+                    return false;
+            }
+
+            return true;
+        }
+    }
+}

CryptoExchange.Net/Converters/MessageParsing/DynamicConverters/MessageEvalutorFieldReference.cs

@@ -0,0 +1,15 @@
+namespace CryptoExchange.Net.Converters.MessageParsing.DynamicConverters
+{
+    internal class MessageEvalutorFieldReference
+    {
+        public bool SkipReading { get; set; }
+        public bool OverlappingField { get; set; }
+        public MessageFieldReference Field { get; set; }
+        public MessageTypeDefinition? ForceEvaluator { get; set; }
+
+        public MessageEvalutorFieldReference(MessageFieldReference field)
+        {
+            Field = field;
+        }
+    }
+}

CryptoExchange.Net/Converters/MessageParsing/DynamicConverters/MessageFieldReference.cs

@@ -0,0 +1,152 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace CryptoExchange.Net.Converters.MessageParsing.DynamicConverters
+{
+    /// <summary>
+    /// Reference to a message field
+    /// </summary>
+    public abstract class MessageFieldReference
+    {
+        /// <summary>
+        /// The name for this search field
+        /// </summary>
+        public string SearchName { get; set; }
+        /// <summary>
+        /// The depth at which to look for this field
+        /// </summary>
+        public int Depth { get; set; } = 1;
+        /// <summary>
+        /// Callback to check if the field value matches an expected constraint
+        /// </summary>
+        public Func<string?, bool>? Constraint { get; private set; }
+
+        /// <summary>
+        /// Check whether the value is one of the string values in the set
+        /// </summary>
+        public MessageFieldReference WithFilterConstraint(HashSet<string?> set)
+        {
+            Constraint = set.Contains;
+            return this;
+        }
+
+        /// <summary>
+        /// Check whether the value is equal to a string
+        /// </summary>
+        public MessageFieldReference WithEqualConstraint(string compare)
+        {
+            Constraint = x => x != null && x.Equals(compare, StringComparison.Ordinal);
+            return this;
+        }
+
+        /// <summary>
+        /// Check whether the value is not equal to a string
+        /// </summary>
+        public MessageFieldReference WithNotEqualConstraint(string compare)
+        {
+            Constraint = x => x == null || !x.Equals(compare, StringComparison.Ordinal);
+            return this;
+        }
+
+        /// <summary>
+        /// Check whether the value is not null
+        /// </summary>
+        public MessageFieldReference WithNotNullConstraint()
+        {
+            Constraint = x => x != null;
+            return this;
+        }
+
+        /// <summary>
+        /// Check whether the value starts with a certain string
+        /// </summary>
+        public MessageFieldReference WithStartsWithConstraint(string start)
+        {
+            Constraint = x => x != null && x.StartsWith(start, StringComparison.Ordinal);
+            return this;
+        }
+
+        /// <summary>
+        /// Check whether the value starts with a certain string
+        /// </summary>
+        public MessageFieldReference WithStartsWithConstraints(params string[] startValues)
+        {
+            Constraint = x =>
+            {
+                if (x == null)
+                    return false;
+
+                foreach (var item in startValues)
+                {
+                    if (x!.StartsWith(item, StringComparison.Ordinal))
+                        return true;
+                }
+
+                return false;
+            };
+            return this;
+        }
+
+        /// <summary>
+        /// Check whether the value starts with a certain string
+        /// </summary>
+        public MessageFieldReference WithCustomConstraint(Func<string?, bool> constraint)
+        {
+            Constraint = constraint;
+            return this;
+        }
+
+        /// <summary>
+        /// ctor
+        /// </summary>
+        public MessageFieldReference(string searchName)
+        {
+            SearchName = searchName;
+        }
+    }
+
+    /// <summary>
+    /// Reference to a property message field
+    /// </summary>
+    public class PropertyFieldReference : MessageFieldReference
+    {
+        /// <summary>
+        /// The property name in the JSON
+        /// </summary>
+        public byte[] PropertyName { get; set; }
+        /// <summary>
+        /// Whether the property value is array values
+        /// </summary>
+        public bool ArrayValues { get; set; }
+
+        /// <summary>
+        /// ctor
+        /// </summary>
+        public PropertyFieldReference(string propertyName) : base(propertyName)
+        {
+            PropertyName = Encoding.UTF8.GetBytes(propertyName);
+        }
+    }
+
+    /// <summary>
+    /// Reference to an array message field
+    /// </summary>
+    public class ArrayFieldReference : MessageFieldReference
+    {
+        /// <summary>
+        /// The index in the array
+        /// </summary>
+        public int ArrayIndex { get; set; }
+
+        /// <summary>
+        /// ctor
+        /// </summary>
+        public ArrayFieldReference(string searchName, int depth, int index) : base(searchName)
+        {
+            Depth = depth;
+            ArrayIndex = index;
+        }
+    }
+
+}

CryptoExchange.Net/Converters/MessageParsing/DynamicConverters/SearchResult.cs

@@ -0,0 +1,60 @@
+using System;
+using System.Collections.Generic;
+
+namespace CryptoExchange.Net.Converters.MessageParsing.DynamicConverters
+{
+    /// <summary>
+    /// The results of a search for fields in a JSON message
+    /// </summary>
+    public class SearchResult
+    {
+        private List<SearchResultItem> _items = new List<SearchResultItem>();
+
+        /// <summary>
+        /// Get the value of a field
+        /// </summary>
+        public string? FieldValue(string searchName)
+        {
+            foreach (var item in _items)
+            {
+                if (item.Field.SearchName.Equals(searchName, StringComparison.Ordinal))
+                    return item.Value;
+            }
+
+            throw new Exception($"No field value found for {searchName}");
+        }
+
+        /// <summary>
+        /// The number of found search field values
+        /// </summary>
+        public int Count => _items.Count;
+
+        /// <summary>
+        /// Clear the search result
+        /// </summary>
+        public void Clear() => _items.Clear();
+
+        /// <summary>
+        /// Whether the value for a specific field was found
+        /// </summary>
+        public bool Contains(MessageFieldReference field)
+        {
+            foreach (var item in _items)
+            {
+                if (item.Field == field)
+                    return true;
+            }
+
+            return false;
+        }
+
+        /// <summary>
+        /// Write a value to the result
+        /// </summary>
+        public void Write(MessageFieldReference field, string? value) => _items.Add(new SearchResultItem
+        {
+            Field = field,
+            Value = value
+        });
+    }
+}

CryptoExchange.Net/Converters/MessageParsing/DynamicConverters/SearchResultItem.cs

@@ -0,0 +1,17 @@
+namespace CryptoExchange.Net.Converters.MessageParsing.DynamicConverters
+{
+    /// <summary>
+    /// Search result value
+    /// </summary>
+    public struct SearchResultItem
+    {
+        /// <summary>
+        /// The field the values is for
+        /// </summary>
+        public MessageFieldReference Field { get; set; }
+        /// <summary>
+        /// The value of the field
+        /// </summary>
+        public string? Value { get; set; }
+    }
+}

CryptoExchange.Net/Converters/MessageParsing/MessageNode.cs

@@ -3,7 +3,7 @@
     /// <summary>
     /// Node accessor
     /// </summary>
-    public struct NodeAccessor
+    public readonly struct NodeAccessor
     {
         /// <summary>
         /// Index

CryptoExchange.Net/Converters/MessageParsing/MessagePath.cs

@@ -6,9 +6,9 @@ namespace CryptoExchange.Net.Converters.MessageParsing
     /// <summary>
     /// Message access definition
     /// </summary>
-    public struct MessagePath : IEnumerable<NodeAccessor>
+    public readonly struct MessagePath : IEnumerable<NodeAccessor>
     {
-        private List<NodeAccessor> _path;
+        private readonly List<NodeAccessor> _path;
 
         internal void Add(NodeAccessor node)
         {

CryptoExchange.Net/Converters/SystemTextJson/ArrayConverter.cs

@@ -1,12 +1,13 @@
-using System;
-using System.Collections.Concurrent;
+using CryptoExchange.Net.Exceptions;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.Globalization;
 using System.Linq;
 using System.Reflection;
-using System.Text.Json.Serialization;
 using System.Text.Json;
-using CryptoExchange.Net.Attributes;
-using System.Collections.Generic;
+using System.Text.Json.Serialization;
+using System.Threading;
 
 namespace CryptoExchange.Net.Converters.SystemTextJson
 {
@@ -14,51 +15,38 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
     /// Converter for arrays to objects. Can deserialize data like [0.1, 0.2, "test"] to an object. Mapping is done by marking the class with [JsonConverter(typeof(ArrayConverter))] and the properties
     /// with [ArrayProperty(x)] where x is the index of the property in the array
     /// </summary>
-    public class ArrayConverter : JsonConverterFactory
+#if NET5_0_OR_GREATER
+    public class ArrayConverter<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicProperties)] T> : JsonConverter<T> where T : new()
+#else
+    public class ArrayConverter<T> : JsonConverter<T> where T : new()
+#endif
     {
-        /// <inheritdoc />
-        public override bool CanConvert(Type typeToConvert) => true;
+        private static SortedDictionary<int, List<ArrayPropertyInfo>>? _typePropertyInfo;
 
         /// <inheritdoc />
-        public override JsonConverter CreateConverter(Type typeToConvert, JsonSerializerOptions options)
+#if NET5_0_OR_GREATER
+        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL3050:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
+        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2026:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
+#endif
+        public override void Write(Utf8JsonWriter writer, T value, JsonSerializerOptions options)
         {
-            Type converterType = typeof(ArrayConverterInner<>).MakeGenericType(typeToConvert);
-            return (JsonConverter)Activator.CreateInstance(converterType);
-        }
-
-        private class ArrayPropertyInfo
-        {
-            public PropertyInfo PropertyInfo { get; set; } = null!;
-            public ArrayPropertyAttribute ArrayProperty { get; set; } = null!;
-            public Type? JsonConverterType { get; set; }
-            public bool DefaultDeserialization { get; set; }
-            public Type TargetType { get; set; } = null!;
-        }
-
-        private class ArrayConverterInner<T> : JsonConverter<T>
-        {
-            private static readonly ConcurrentDictionary<Type, List<ArrayPropertyInfo>> _typeAttributesCache = new ConcurrentDictionary<Type, List<ArrayPropertyInfo>>();
-            private static readonly ConcurrentDictionary<Type, JsonSerializerOptions> _converterOptionsCache = new ConcurrentDictionary<Type, JsonSerializerOptions>();
-
-            public override void Write(Utf8JsonWriter writer, T value, JsonSerializerOptions options)
+            if (value == null)
             {
-                if (value == null)
-                {
-                    writer.WriteNullValue();
-                    return;
-                }
+                writer.WriteNullValue();
+                return;
+            }
 
-                writer.WriteStartArray();
+            if (_typePropertyInfo == null)
+                _typePropertyInfo = CacheTypeAttributes();
 
-                var valueType = value.GetType();
-                if (!_typeAttributesCache.TryGetValue(valueType, out var typeAttributes))
-                    typeAttributes = CacheTypeAttributes(valueType);
-
-                var ordered = typeAttributes.Where(x => x.ArrayProperty != null).OrderBy(p => p.ArrayProperty.Index);
-                var last = -1;
-                foreach (var prop in ordered)
+            writer.WriteStartArray();
+            var last = -1;
+            foreach (var indexProps in _typePropertyInfo)
+            {
+                foreach (var prop in indexProps.Value)
                 {
                     if (prop.ArrayProperty.Index == last)
+                        // Don't write the same index twice
                         continue;
 
                     while (prop.ArrayProperty.Index != last + 1)
@@ -77,148 +65,182 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
                     }
 
                     JsonSerializerOptions? typeOptions = null;
-                    if (prop.JsonConverterType != null)
+                    if (prop.JsonConverter != null)
                     {
-                        var converter = (JsonConverter)Activator.CreateInstance(prop.JsonConverterType);
-                        typeOptions = new JsonSerializerOptions();
-                        typeOptions.Converters.Clear();
-                        typeOptions.Converters.Add(converter);
+                        typeOptions = new JsonSerializerOptions
+                        {
+                            NumberHandling = JsonNumberHandling.AllowReadingFromString | JsonNumberHandling.AllowNamedFloatingPointLiterals,
+                            PropertyNameCaseInsensitive = false,
+                            TypeInfoResolver = options.TypeInfoResolver,
+                        };
+                        typeOptions.Converters.Add(prop.JsonConverter);
                     }
 
-                    if (prop.JsonConverterType == null && IsSimple(prop.PropertyInfo.PropertyType))
+                    if (prop.JsonConverter == null && IsSimple(prop.PropertyInfo.PropertyType))
                     {
-                        if (prop.PropertyInfo.PropertyType == typeof(string))
+                        if (prop.TargetType == typeof(string))
                             writer.WriteStringValue(Convert.ToString(objValue, CultureInfo.InvariantCulture));
+                        else if (prop.TargetType == typeof(bool))
+                            writer.WriteBooleanValue((bool)objValue);
                         else
-                            writer.WriteRawValue(Convert.ToString(objValue, CultureInfo.InvariantCulture));
+                            writer.WriteRawValue(Convert.ToString(objValue, CultureInfo.InvariantCulture)!);
                     }
                     else
                     {
                         JsonSerializer.Serialize(writer, objValue, typeOptions ?? options);
                     }
                 }
-
-                writer.WriteEndArray();
             }
 
-            /// <inheritdoc />
-            public override T? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
-            {
-                if (reader.TokenType == JsonTokenType.Null)
-                    return default;
+            writer.WriteEndArray();
+        }
 
-                var result = Activator.CreateInstance(typeToConvert);
-                return (T)ParseObject(ref reader, result, typeToConvert, options);
-            }
+        /// <inheritdoc />
+        public override T? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            if (reader.TokenType == JsonTokenType.Null)
+                return default;
 
-            private static bool IsSimple(Type type)
+            var result = new T();
+            return ParseObject(ref reader, result, options);
+        }
+
+
+#if NET5_0_OR_GREATER
+        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL3050:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
+        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2026:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
+        private static T ParseObject(ref Utf8JsonReader reader, T result, JsonSerializerOptions options)
+#else
+        private static T ParseObject(ref Utf8JsonReader reader, T result, JsonSerializerOptions options)
+#endif
+        {
+            if (reader.TokenType != JsonTokenType.StartArray)
+                throw new CeDeserializationException("Not an array");
+
+
+            if (_typePropertyInfo == null)
+                _typePropertyInfo = CacheTypeAttributes();
+
+            int index = 0;
+            while (reader.Read())
             {
-                if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable<>))
+                if (reader.TokenType == JsonTokenType.EndArray)
+                    break;
+
+                if(!_typePropertyInfo.TryGetValue(index, out var indexAttributes))
                 {
-                    // 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);
-            }
-
-            private static List<ArrayPropertyInfo> CacheTypeAttributes(Type type)
-            {
-                var attributes = new List<ArrayPropertyInfo>();
-                var properties = type.GetProperties();
-                foreach (var property in properties)
-                {
-                    var att = property.GetCustomAttribute<ArrayPropertyAttribute>();
-                    if (att == null)
-                        continue;
-
-                    attributes.Add(new ArrayPropertyInfo
-                    {
-                        ArrayProperty = att,
-                        PropertyInfo = property,
-                        DefaultDeserialization = property.GetCustomAttribute<JsonConversionAttribute>() != null,
-                        JsonConverterType = property.GetCustomAttribute<JsonConverterAttribute>()?.ConverterType ?? property.PropertyType.GetCustomAttribute<JsonConverterAttribute>()?.ConverterType,
-                        TargetType = Nullable.GetUnderlyingType(property.PropertyType) ?? property.PropertyType
-                    });
+                    index++;
+                    continue;
                 }
 
-                _typeAttributesCache.TryAdd(type, attributes);
-                return attributes;
-            }
-
-            private static object ParseObject(ref Utf8JsonReader reader, object result, Type objectType, JsonSerializerOptions options)
-            {
-                if (reader.TokenType != JsonTokenType.StartArray)
-                    throw new Exception("Not an array");
-
-                if (!_typeAttributesCache.TryGetValue(objectType, out var attributes))
-                    attributes = CacheTypeAttributes(objectType);
-
-                int index = 0;
-                while (reader.Read())
+                foreach (var attribute in indexAttributes)
                 {
-                    if (reader.TokenType == JsonTokenType.EndArray)
-                        break;
-
-                    var indexAttributes = attributes.Where(a => a.ArrayProperty.Index == index);
-                    if (!indexAttributes.Any())
+                    var targetType = attribute.TargetType;
+                    object? value = null;
+                    if (attribute.JsonConverter != null)
                     {
-                        index++;
-                        continue;
-                    }
-
-                    foreach (var attribute in indexAttributes)
-                    {
-                        var targetType = attribute.TargetType;
-                        object? value = null;
-                        if (attribute.JsonConverterType != null)
+                        if (attribute.JsonSerializerOptions == null)
                         {
-                            if (!_converterOptionsCache.TryGetValue(attribute.JsonConverterType, out var newOptions))
+                            attribute.JsonSerializerOptions = new JsonSerializerOptions
                             {
-                                var converter = (JsonConverter)Activator.CreateInstance(attribute.JsonConverterType);
-                                newOptions = new JsonSerializerOptions
-                                {
-                                    NumberHandling = SerializerOptions.WithConverters.NumberHandling,
-                                    PropertyNameCaseInsensitive = SerializerOptions.WithConverters.PropertyNameCaseInsensitive,
-                                    Converters = { converter },
-                                };
-                                _converterOptionsCache.TryAdd(attribute.JsonConverterType, newOptions);
-                            }
-
-                            value = JsonDocument.ParseValue(ref reader).Deserialize(targetType, newOptions);
-                        }
-                        else if (attribute.DefaultDeserialization)
-                        {
-                            // Use default deserialization
-                            value = JsonDocument.ParseValue(ref reader).Deserialize(targetType, options);
-                        }
-                        else
-                        {
-                            value = reader.TokenType switch
-                            {
-                                JsonTokenType.Null => null,
-                                JsonTokenType.False => false,
-                                JsonTokenType.True => true,
-                                JsonTokenType.String => reader.GetString(),
-                                JsonTokenType.Number => reader.GetDecimal(),
-                                JsonTokenType.StartObject => JsonSerializer.Deserialize(ref reader, attribute.TargetType, options),
-                                _ => throw new NotImplementedException($"Array deserialization of type {reader.TokenType} not supported"),
+                                NumberHandling = JsonNumberHandling.AllowReadingFromString | JsonNumberHandling.AllowNamedFloatingPointLiterals,
+                                PropertyNameCaseInsensitive = false,
+                                Converters = { attribute.JsonConverter },
+                                TypeInfoResolver = options.TypeInfoResolver,
                             };
                         }
 
-                        if (targetType.IsAssignableFrom(value?.GetType()))
-                            attribute.PropertyInfo.SetValue(result, value == null ? null : value);
-                        else
-                            attribute.PropertyInfo.SetValue(result, value == null ? null : Convert.ChangeType(value, targetType, CultureInfo.InvariantCulture));
+                        var doc = JsonDocument.ParseValue(ref reader);
+                        value = doc.Deserialize(attribute.PropertyInfo.PropertyType, attribute.JsonSerializerOptions);
+                    }
+                    else if (attribute.DefaultDeserialization)
+                    {
+                        value = JsonDocument.ParseValue(ref reader).Deserialize(options.GetTypeInfo(attribute.PropertyInfo.PropertyType));
+                    }
+                    else
+                    {
+                        value = reader.TokenType switch
+                        {
+                            JsonTokenType.Null => null,
+                            JsonTokenType.False => false,
+                            JsonTokenType.True => true,
+                            JsonTokenType.String => reader.GetString(),
+                            JsonTokenType.Number => reader.GetDecimal(),
+                            JsonTokenType.StartObject => JsonSerializer.Deserialize(ref reader, attribute.TargetType, options),
+                            _ => throw new CeDeserializationException($"Array deserialization of type {reader.TokenType} not supported"),
+                        };
                     }
 
-                    index++;
+                    if (targetType.IsAssignableFrom(value?.GetType()))
+                        attribute.PropertyInfo.SetValue(result, value);
+                    else
+                        attribute.PropertyInfo.SetValue(result, value == null ? null : Convert.ChangeType(value, targetType, CultureInfo.InvariantCulture));
                 }
 
-                return result;
+                index++;
             }
+
+            return result;
+        }
+
+        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);
+        }
+
+#if NET5_0_OR_GREATER
+        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL3050:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
+        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2026:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
+        private static SortedDictionary<int, List<ArrayPropertyInfo>> CacheTypeAttributes()
+#else
+        private static SortedDictionary<int, List<ArrayPropertyInfo>> CacheTypeAttributes()
+#endif
+        {
+            var result = new SortedDictionary<int, List<ArrayPropertyInfo>>();
+            var properties = typeof(T).GetProperties();
+            foreach (var property in properties)
+            {
+                var att = property.GetCustomAttribute<ArrayPropertyAttribute>();
+                if (att == null)
+                    continue;
+
+                var targetType = Nullable.GetUnderlyingType(property.PropertyType) ?? property.PropertyType;
+                var converterType = property.GetCustomAttribute<JsonConverterAttribute>()?.ConverterType ?? targetType.GetCustomAttribute<JsonConverterAttribute>()?.ConverterType;
+                if (!result.TryGetValue(att.Index, out var indexList))
+                {
+                    indexList = new List<ArrayPropertyInfo>();
+                    result[att.Index] = indexList;
+                }
+
+                indexList.Add(new ArrayPropertyInfo
+                {
+                    ArrayProperty = att,
+                    PropertyInfo = property,
+                    DefaultDeserialization = property.GetCustomAttribute<CryptoExchange.Net.Attributes.JsonConversionAttribute>() != null,
+                    JsonConverter = converterType == null ? null : (JsonConverter)Activator.CreateInstance(converterType)!,
+                    TargetType = targetType
+                });
+            }
+
+            return result;
+        }
+
+        private class ArrayPropertyInfo
+        {
+            public PropertyInfo PropertyInfo { get; set; } = null!;
+            public ArrayPropertyAttribute ArrayProperty { get; set; } = null!;
+            public JsonConverter? JsonConverter { get; set; }
+            public bool DefaultDeserialization { get; set; }
+            public Type TargetType { get; set; } = null!;
+            public JsonSerializerOptions? JsonSerializerOptions { get; set; } = null;
         }
     }
 }

CryptoExchange.Net/Converters/SystemTextJson/BigDecimalConverter.cs

@@ -17,7 +17,7 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
             {
                 try
                 {
-                    return decimal.Parse(reader.GetString(), NumberStyles.Float, CultureInfo.InvariantCulture);
+                    return decimal.Parse(reader.GetString()!, NumberStyles.Float, CultureInfo.InvariantCulture);
                 }
                 catch(OverflowException)
                 {

CryptoExchange.Net/Converters/SystemTextJson/BoolConverter.cs

@@ -1,5 +1,5 @@
-using System;
-using System.Diagnostics;
+using Microsoft.Extensions.Logging;
+using System;
 using System.Runtime.Serialization;
 using System.Text.Json;
 using System.Text.Json.Serialization;
@@ -20,59 +20,15 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
         /// <inheritdoc />
         public override JsonConverter CreateConverter(Type typeToConvert, JsonSerializerOptions options)
         {
-            Type converterType = typeof(BoolConverterInner<>).MakeGenericType(typeToConvert);
-            return (JsonConverter)Activator.CreateInstance(converterType);
+            return typeToConvert == typeof(bool) ? new BoolConverterInner() : new BoolConverterInnerNullable();
         }
 
-        private class BoolConverterInner<T> : JsonConverter<T>
+        private class BoolConverterInnerNullable : JsonConverter<bool?>
         {
-            public override T Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
-                => (T)((object?)ReadBool(ref reader, typeToConvert, options) ?? default(T))!;
+            public override bool? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+                => ReadBool(ref reader, typeToConvert, options);
             
-            public bool? ReadBool(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
-            {
-                if (reader.TokenType == JsonTokenType.True)
-                    return true;
-
-                if (reader.TokenType == JsonTokenType.False)
-                    return false;
-
-                var value = reader.TokenType switch
-                {
-                    JsonTokenType.String => reader.GetString(),
-                    JsonTokenType.Number => reader.GetInt16().ToString(),
-                    _ => null
-                };
-
-                value = value?.ToLowerInvariant().Trim();
-                if (string.IsNullOrEmpty(value))
-                {
-                    if (typeToConvert == typeof(bool))
-                        Trace.WriteLine($"{DateTime.Now:yyyy/MM/dd HH:mm:ss:fff} | Warning | Received null bool value, but property type is not a nullable bool");
-                    return default;
-                }
-
-                switch (value)
-                {
-                    case "true":
-                    case "yes":
-                    case "y":
-                    case "1":
-                    case "on":
-                        return true;
-                    case "false":
-                    case "no":
-                    case "n":
-                    case "0":
-                    case "off":
-                    case "-1":
-                        return false;
-                }
-
-                throw new SerializationException($"Can't convert bool value {value}");
-            }
-
-            public override void Write(Utf8JsonWriter writer, T value, JsonSerializerOptions options)
+            public override void Write(Utf8JsonWriter writer, bool? value, JsonSerializerOptions options)
             {
                 if (value is bool boolVal)
                     writer.WriteBooleanValue(boolVal);
@@ -81,5 +37,59 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
             }
         }
 
+        private class BoolConverterInner : JsonConverter<bool>
+        {
+            public override bool Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+                => ReadBool(ref reader, typeToConvert, options) ?? false;
+
+            public override void Write(Utf8JsonWriter writer, bool value, JsonSerializerOptions options)
+            {
+                writer.WriteBooleanValue(value);
+            }
+        }
+
+        private static bool? ReadBool(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            if (reader.TokenType == JsonTokenType.True)
+                return true;
+
+            if (reader.TokenType == JsonTokenType.False)
+                return false;
+
+            var value = reader.TokenType switch
+            {
+                JsonTokenType.String => reader.GetString(),
+                JsonTokenType.Number => reader.GetInt16().ToString(),
+                _ => null
+            };
+
+            value = value?.ToLowerInvariant().Trim();
+            if (string.IsNullOrEmpty(value))
+            {
+                if (typeToConvert == typeof(bool))
+                    LibraryHelpers.StaticLogger?.LogWarning("Received null or empty bool value, but property type is not a nullable bool. Resolver: {Resolver}", options.TypeInfoResolver?.GetType()?.Name);
+                return default;
+            }
+
+            switch (value)
+            {
+                case "true":
+                case "yes":
+                case "y":
+                case "1":
+                case "on":
+                    return true;
+                case "false":
+                case "no":
+                case "n":
+                case "0":
+                case "off":
+                case "-1":
+                    return false;
+            }
+
+            throw new SerializationException($"Can't convert bool value {value}");
+        }
+
     }
 }

CryptoExchange.Net/Converters/SystemTextJson/CommaSplitEnumConverter.cs

@@ -1,25 +1,33 @@
 using System;
-using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq;
-using System.Text;
 using System.Text.Json;
 using System.Text.Json.Serialization;
 
 namespace CryptoExchange.Net.Converters.SystemTextJson
 {
     /// <summary>
-    /// Converter for comma seperated enum values
+    /// Converter for comma separated enum values
     /// </summary>
-    public class CommaSplitEnumConverter<T> : JsonConverter<IEnumerable<T>> where T : Enum
+#if NET5_0_OR_GREATER
+    public class CommaSplitEnumConverter<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicParameterlessConstructor | DynamicallyAccessedMemberTypes.PublicFields)] T> : JsonConverter<T[]> where T : struct, Enum
+#else
+    public class CommaSplitEnumConverter<T> : JsonConverter<T[]> where T : struct, Enum
+#endif
+
     {
         /// <inheritdoc />
-        public override IEnumerable<T>? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        public override T[]? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
         {
-            return (reader.GetString()?.Split(',').Select(x => EnumConverter.ParseString<T>(x)).ToArray() ?? new T[0])!;
+            var str = reader.GetString();
+            if (string.IsNullOrEmpty(str))
+                return [];
+
+            return str!.Split(',').Select(x => (T)EnumConverter.ParseString<T>(x)!).ToArray() ?? [];
         }
 
         /// <inheritdoc />
-        public override void Write(Utf8JsonWriter writer, IEnumerable<T> value, JsonSerializerOptions options)
+        public override void Write(Utf8JsonWriter writer, T[] value, JsonSerializerOptions options)
         {
             writer.WriteStringValue(string.Join(",", value.Select(x => EnumConverter.GetString(x))));
         }

CryptoExchange.Net/Converters/SystemTextJson/DateTimeConverter.cs

@@ -1,5 +1,5 @@
-using System;
-using System.Diagnostics;
+using Microsoft.Extensions.Logging;
+using System;
 using System.Diagnostics.CodeAnalysis;
 using System.Globalization;
 using System.Text.Json;
@@ -14,8 +14,8 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
     {
         private static readonly DateTime _epoch = new(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
         private const long _ticksPerSecond = TimeSpan.TicksPerMillisecond * 1000;
-        private const double _ticksPerMicrosecond = TimeSpan.TicksPerMillisecond / 1000d;
-        private const double _ticksPerNanosecond = TimeSpan.TicksPerMillisecond / 1000d / 1000;
+        private const decimal _ticksPerMicrosecond = TimeSpan.TicksPerMillisecond / 1000m;
+        private const decimal _ticksPerNanosecond = TimeSpan.TicksPerMillisecond / 1000m / 1000;
 
         /// <inheritdoc />
         public override bool CanConvert(Type typeToConvert)
@@ -26,91 +26,107 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
         /// <inheritdoc />
         public override JsonConverter CreateConverter(Type typeToConvert, JsonSerializerOptions options)
         {
-            Type converterType = typeof(DateTimeConverterInner<>).MakeGenericType(typeToConvert);
-            return (JsonConverter)Activator.CreateInstance(converterType);
+            return typeToConvert == typeof(DateTime) ? new DateTimeConverterInner() : new NullableDateTimeConverterInner();
         }
 
-        private class DateTimeConverterInner<T> : JsonConverter<T>
+        private class NullableDateTimeConverterInner : JsonConverter<DateTime?>
         {
-            public override T Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
-                => (T)((object?)ReadDateTime(ref reader, typeToConvert, options) ?? default(T))!;
+            public override DateTime? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+                => ReadDateTime(ref reader, typeToConvert, options);
 
-            private DateTime? ReadDateTime(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+            public override void Write(Utf8JsonWriter writer, DateTime? value, JsonSerializerOptions options)
             {
-                if (reader.TokenType == JsonTokenType.Null)
+                if (value == null)
+                {
+                    writer.WriteNullValue();
+                    return;
+                }
+
+                if (value.Value == default)
+                    writer.WriteStringValue(default(DateTime));
+                else
+                    writer.WriteNumberValue((long)Math.Round((value.Value - new DateTime(1970, 1, 1)).TotalMilliseconds));
+            }
+        }
+
+        private class DateTimeConverterInner : JsonConverter<DateTime>
+        {
+            public override DateTime Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+                => ReadDateTime(ref reader, typeToConvert, options) ?? default;            
+
+            public override void Write(Utf8JsonWriter writer, DateTime value, JsonSerializerOptions options)
+            {
+                var dtValue = value;
+                if (dtValue == default)
+                    writer.WriteStringValue(default(DateTime));
+                else
+                    writer.WriteNumberValue((long)Math.Round((dtValue - new DateTime(1970, 1, 1)).TotalMilliseconds));
+            }
+        }
+
+        private static DateTime? ReadDateTime(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            if (reader.TokenType == JsonTokenType.Null)
+            {
+                if (typeToConvert == typeof(DateTime))
+                    LibraryHelpers.StaticLogger?.LogWarning("DateTime value of null, but property is not nullable. Resolver: {Resolver}", options.TypeInfoResolver?.GetType()?.Name);
+                return default;
+            }
+
+            if (reader.TokenType is JsonTokenType.Number)
+            {
+                var decValue = reader.GetDecimal();
+                if (decValue == 0 || decValue < 0)
+                    return default;
+
+                return ParseFromDecimal(decValue);
+            }
+            else if (reader.TokenType is JsonTokenType.String)
+            {
+                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)
                 {
-                    if (typeToConvert == typeof(DateTime))
-                        Trace.WriteLine($"{DateTime.Now:yyyy/MM/dd HH:mm:ss:fff} | Warning | DateTime value of null, but property is not nullable");
                     return default;
                 }
 
-                if (reader.TokenType is JsonTokenType.Number)
-                {
-                    var longValue = reader.GetDouble();
-                    if (longValue == 0 || longValue == -1)
-                        return default;
-
-                    return ParseFromDouble(longValue);
-                }
-                else if (reader.TokenType is JsonTokenType.String)
-                {
-                    var stringValue = reader.GetString();
-                    if (string.IsNullOrWhiteSpace(stringValue)
-                        || stringValue == "-1"
-                        || stringValue == "0001-01-01T00:00:00Z"
-                        || double.TryParse(stringValue, out var doubleVal) && doubleVal == 0)
-                    {
-                        return default;
-                    }
-
-                    return ParseFromString(stringValue!);
-                }
-                else
-                {
-                    return reader.GetDateTime();
-                }
+                return ParseFromString(stringValue!, options.TypeInfoResolver?.GetType()?.Name);
             }
-
-            public override void Write(Utf8JsonWriter writer, T value, JsonSerializerOptions options)
+            else
             {
-                if (value == null)
-                    writer.WriteNullValue();
-                else
-                {
-                    var dtValue = (DateTime)(object)value;
-                    if (dtValue == default)
-                        writer.WriteStringValue(default(DateTime));
-                    else
-                        writer.WriteNumberValue((long)Math.Round((dtValue - new DateTime(1970, 1, 1)).TotalMilliseconds));
-                }
+                return reader.GetDateTime();
             }
         }
 
         /// <summary>
-        /// Parse a long value to datetime
+        /// Parse a double value to datetime
         /// </summary>
-        /// <param name="longValue"></param>
-        /// <returns></returns>
-        public static DateTime ParseFromDouble(double longValue)
-        {
-            if (longValue < 19999999999)
-                return ConvertFromSeconds(longValue);
-            if (longValue < 19999999999999)
-                return ConvertFromMilliseconds(longValue);
-            if (longValue < 19999999999999999)
-                return ConvertFromMicroseconds(longValue);
+        public static DateTime ParseFromDouble(double value)
+            => ParseFromDecimal((decimal)value);
 
-            return ConvertFromNanoseconds(longValue);
+        /// <summary>
+        /// Parse a decimal value to datetime
+        /// </summary>
+        public static DateTime ParseFromDecimal(decimal value)
+        {
+            if (value < 19999999999)
+                return ConvertFromSeconds(value);
+            if (value < 19999999999999)
+                return ConvertFromMilliseconds(value);
+            if (value < 19999999999999999)
+                return ConvertFromMicroseconds(value);
+
+            return ConvertFromNanoseconds(value);
         }
 
         /// <summary>
         /// Parse a string value to datetime
         /// </summary>
-        /// <param name="stringValue"></param>
-        /// <returns></returns>
-        public static DateTime ParseFromString(string stringValue)
+        public static DateTime ParseFromString(string stringValue, string? resolverName)
         {
-            if (stringValue!.Length == 12 && stringValue.StartsWith("202"))
+            if (stringValue!.Length == 12 && stringValue.StartsWith("202", StringComparison.OrdinalIgnoreCase))
             {
                 // Parse 202303261200 format
                 if (!int.TryParse(stringValue.Substring(0, 4), out var year)
@@ -119,7 +135,7 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
                     || !int.TryParse(stringValue.Substring(8, 2), out var hour)
                     || !int.TryParse(stringValue.Substring(10, 2), out var minute))
                 {
-                    Trace.WriteLine($"{DateTime.Now:yyyy/MM/dd HH:mm:ss:fff} | Warning | Unknown DateTime format: " + stringValue);
+                    LibraryHelpers.StaticLogger?.LogWarning("Unknown DateTime format: {Value}. Resolver: {Resolver}", stringValue, resolverName);
                     return default;
                 }
                 return new DateTime(year, month, day, hour, minute, 0, DateTimeKind.Utc);
@@ -132,7 +148,7 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
                     || !int.TryParse(stringValue.Substring(4, 2), out var month)
                     || !int.TryParse(stringValue.Substring(6, 2), out var day))
                 {
-                    Trace.WriteLine($"{DateTime.Now:yyyy/MM/dd HH:mm:ss:fff} | Warning | Unknown DateTime format: " + stringValue);
+                    LibraryHelpers.StaticLogger?.LogWarning("Unknown DateTime format: {Value}. Resolver: {Resolver}", stringValue, resolverName);
                     return default;
                 }
                 return new DateTime(year, month, day, 0, 0, 0, DateTimeKind.Utc);
@@ -145,25 +161,25 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
                     || !int.TryParse(stringValue.Substring(2, 2), out var month)
                     || !int.TryParse(stringValue.Substring(4, 2), out var day))
                 {
-                    Trace.WriteLine("{DateTime.Now:yyyy/MM/dd HH:mm:ss:fff} | Warning | Unknown DateTime format: " + stringValue);
+                    LibraryHelpers.StaticLogger?.LogWarning("Unknown DateTime format: {Value}. Resolver: {Resolver}", stringValue, resolverName);
                     return default;
                 }
                 return new DateTime(year + 2000, month, day, 0, 0, 0, DateTimeKind.Utc);
             }
 
-            if (double.TryParse(stringValue, NumberStyles.Float, CultureInfo.InvariantCulture, out var doubleValue))
+            if (decimal.TryParse(stringValue, NumberStyles.Float, CultureInfo.InvariantCulture, out var decimalValue))
             {
                 // Parse 1637745563.000 format
-                if (doubleValue <= 0)
+                if (decimalValue <= 0)
                     return default;
-                if (doubleValue < 19999999999)
-                    return ConvertFromSeconds(doubleValue);
-                if (doubleValue < 19999999999999)
-                    return ConvertFromMilliseconds((long)doubleValue);
-                if (doubleValue < 19999999999999999)
-                    return ConvertFromMicroseconds((long)doubleValue);
+                if (decimalValue < 19999999999)
+                    return ConvertFromSeconds(decimalValue);
+                if (decimalValue < 19999999999999)
+                    return ConvertFromMilliseconds(decimalValue);
+                if (decimalValue < 19999999999999999)
+                    return ConvertFromMicroseconds(decimalValue);
 
-                return ConvertFromNanoseconds((long)doubleValue);
+                return ConvertFromNanoseconds(decimalValue);
             }
 
             if (stringValue.Length == 10)
@@ -174,7 +190,7 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
                     || !int.TryParse(values[1], out var month)
                     || !int.TryParse(values[2], out var day))
                 {
-                    Trace.WriteLine("{DateTime.Now:yyyy/MM/dd HH:mm:ss:fff} | Warning | Unknown DateTime format: " + stringValue);
+                    LibraryHelpers.StaticLogger?.LogWarning("Unknown DateTime format: {Value}. Resolver: {Resolver}", stringValue, resolverName);
                     return default;
                 }
 
@@ -187,54 +203,70 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
         /// <summary>
         /// Convert a seconds since epoch (01-01-1970) value to DateTime
         /// </summary>
-        /// <param name="seconds"></param>
-        /// <returns></returns>
-        public static DateTime ConvertFromSeconds(double seconds) => _epoch.AddTicks((long)Math.Round(seconds * _ticksPerSecond));
-        /// <summary>
-        /// Convert a milliseconds since epoch (01-01-1970) value to DateTime
-        /// </summary>
-        /// <param name="milliseconds"></param>
-        /// <returns></returns>
-        public static DateTime ConvertFromMilliseconds(double milliseconds) => _epoch.AddTicks((long)Math.Round(milliseconds * TimeSpan.TicksPerMillisecond));
-        /// <summary>
-        /// Convert a microseconds since epoch (01-01-1970) value to DateTime
-        /// </summary>
-        /// <param name="microseconds"></param>
-        /// <returns></returns>
-        public static DateTime ConvertFromMicroseconds(double microseconds) => _epoch.AddTicks((long)Math.Round(microseconds * _ticksPerMicrosecond));
+        public static DateTime ConvertFromSeconds(decimal seconds) => _epoch.AddTicks((long)Math.Round(seconds * _ticksPerSecond));
         /// <summary>
         /// Convert a nanoseconds since epoch (01-01-1970) value to DateTime
         /// </summary>
-        /// <param name="nanoseconds"></param>
-        /// <returns></returns>
-        public static DateTime ConvertFromNanoseconds(double nanoseconds) => _epoch.AddTicks((long)Math.Round(nanoseconds * _ticksPerNanosecond));
+        public static DateTime ConvertFromSeconds(double seconds) => ConvertFromSeconds((decimal)seconds);
+        /// <summary>
+        /// Convert a nanoseconds since epoch (01-01-1970) value to DateTime
+        /// </summary>
+        public static DateTime ConvertFromSeconds(long seconds) => ConvertFromSeconds((decimal)seconds);
+        /// <summary>
+        /// Convert a milliseconds since epoch (01-01-1970) value to DateTime
+        /// </summary>
+        public static DateTime ConvertFromMilliseconds(decimal milliseconds) => _epoch.AddTicks((long)Math.Round(milliseconds * TimeSpan.TicksPerMillisecond));
+        /// <summary>
+        /// Convert a nanoseconds since epoch (01-01-1970) value to DateTime
+        /// </summary>
+        public static DateTime ConvertFromMilliseconds(double milliseconds) => ConvertFromMilliseconds((decimal)milliseconds);
+        /// <summary>
+        /// Convert a nanoseconds since epoch (01-01-1970) value to DateTime
+        /// </summary>
+        public static DateTime ConvertFromMilliseconds(long milliseconds) => ConvertFromMilliseconds((decimal)milliseconds);
+        /// <summary>
+        /// Convert a microseconds since epoch (01-01-1970) value to DateTime
+        /// </summary>
+        public static DateTime ConvertFromMicroseconds(decimal microseconds) => _epoch.AddTicks((long)Math.Round(microseconds * _ticksPerMicrosecond));
+        /// <summary>
+        /// Convert a nanoseconds since epoch (01-01-1970) value to DateTime
+        /// </summary>
+        public static DateTime ConvertFromMicroseconds(double microseconds) => ConvertFromMicroseconds((decimal)microseconds);
+        /// <summary>
+        /// Convert a nanoseconds since epoch (01-01-1970) value to DateTime
+        /// </summary>
+        public static DateTime ConvertFromMicroseconds(long microseconds) => ConvertFromMicroseconds((decimal)microseconds);
+        /// <summary>
+        /// Convert a nanoseconds since epoch (01-01-1970) value to DateTime
+        /// </summary>
+        public static DateTime ConvertFromNanoseconds(decimal nanoseconds) => _epoch.AddTicks((long)Math.Round(nanoseconds * _ticksPerNanosecond));
+        /// <summary>
+        /// Convert a nanoseconds since epoch (01-01-1970) value to DateTime
+        /// </summary>
+        public static DateTime ConvertFromNanoseconds(double nanoseconds) => ConvertFromNanoseconds((decimal)nanoseconds);
+        /// <summary>
+        /// Convert a nanoseconds since epoch (01-01-1970) value to DateTime
+        /// </summary>
+        public static DateTime ConvertFromNanoseconds(long nanoseconds) => ConvertFromNanoseconds((decimal)nanoseconds);
 
         /// <summary>
         /// Convert a DateTime value to seconds since epoch (01-01-1970) value
         /// </summary>
-        /// <param name="time"></param>
-        /// <returns></returns>
         [return: NotNullIfNotNull("time")]
         public static long? ConvertToSeconds(DateTime? time) => time == null ? null : (long)Math.Round((time.Value - _epoch).TotalSeconds);
         /// <summary>
         /// Convert a DateTime value to milliseconds since epoch (01-01-1970) value
         /// </summary>
-        /// <param name="time"></param>
-        /// <returns></returns>
         [return: NotNullIfNotNull("time")]
         public static long? ConvertToMilliseconds(DateTime? time) => time == null ? null : (long)Math.Round((time.Value - _epoch).TotalMilliseconds);
         /// <summary>
         /// Convert a DateTime value to microseconds since epoch (01-01-1970) value
         /// </summary>
-        /// <param name="time"></param>
-        /// <returns></returns>
         [return: NotNullIfNotNull("time")]
         public static long? ConvertToMicroseconds(DateTime? time) => time == null ? null : (long)Math.Round((time.Value - _epoch).Ticks / _ticksPerMicrosecond);
         /// <summary>
         /// Convert a DateTime value to nanoseconds since epoch (01-01-1970) value
         /// </summary>
-        /// <param name="time"></param>
-        /// <returns></returns>
         [return: NotNullIfNotNull("time")]
         public static long? ConvertToNanoseconds(DateTime? time) => time == null ? null : (long)Math.Round((time.Value - _epoch).Ticks / _ticksPerNanosecond);
     }

CryptoExchange.Net/Converters/SystemTextJson/DecimalConverter.cs

@@ -1,5 +1,4 @@
 using System;
-using System.Globalization;
 using System.Text.Json;
 using System.Text.Json.Serialization;
 
@@ -19,22 +18,7 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
             if (reader.TokenType == JsonTokenType.String)
             {
                 var value = reader.GetString();
-                if (string.IsNullOrEmpty(value) || string.Equals("null", value, StringComparison.OrdinalIgnoreCase))
-                    return null;
-
-                if (string.Equals("Infinity", value, StringComparison.Ordinal))
-                    // Infinity returned by the server, default to max value
-                    return decimal.MaxValue;
-
-                try
-                {
-                    return decimal.Parse(value, NumberStyles.Float, CultureInfo.InvariantCulture);
-                }
-                catch(OverflowException)
-                {
-                    // Value doesn't fit decimal, default to max value
-                    return decimal.MaxValue;
-                }
+                return ExchangeHelpers.ParseDecimal(value);
             }
 
             try

CryptoExchange.Net/Converters/SystemTextJson/EnumConverter.cs

@@ -1,8 +1,11 @@
 using CryptoExchange.Net.Attributes;
+using Microsoft.Extensions.Logging;
 using System;
 using System.Collections.Concurrent;
+#if NET8_0_OR_GREATER
+using System.Collections.Frozen;
+#endif
 using System.Collections.Generic;
-using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using System.Reflection;
@@ -11,127 +14,96 @@ using System.Text.Json.Serialization;
 
 namespace CryptoExchange.Net.Converters.SystemTextJson
 {
+    /// <summary>
+    /// Static EnumConverter methods
+    /// </summary>
+    public static class EnumConverter
+    {
+        /// <summary>
+        /// Get the enum value from a string
+        /// </summary>
+        /// <param name="value">String value</param>
+        /// <returns></returns>
+#if NET5_0_OR_GREATER
+        public static T? ParseString<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicParameterlessConstructor | DynamicallyAccessedMemberTypes.PublicFields)] T>(string value) where T : struct, Enum
+#else
+        public static T? ParseString<T>(string value) where T : struct, Enum
+#endif
+            => EnumConverter<T>.ParseString(value);
+
+        /// <summary>
+        /// Get the string value for an enum value using the MapAttribute mapping. When multiple values are mapped for a enum entry the first value will be returned
+        /// </summary>
+        /// <param name="enumValue"></param>
+        /// <returns></returns>
+#if NET5_0_OR_GREATER
+        public static string GetString<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicParameterlessConstructor | DynamicallyAccessedMemberTypes.PublicFields)] T>(T enumValue) where T : struct, Enum
+#else
+        public static string GetString<T>(T enumValue) where T : struct, Enum
+#endif
+            => EnumConverter<T>.GetString(enumValue);
+
+        /// <summary>
+        /// Get the string value for an enum value using the MapAttribute mapping. When multiple values are mapped for a enum entry the first value will be returned
+        /// </summary>
+        /// <param name="enumValue"></param>
+        /// <returns></returns>
+        [return: NotNullIfNotNull("enumValue")]
+#if NET5_0_OR_GREATER
+        public static string? GetString<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicParameterlessConstructor | DynamicallyAccessedMemberTypes.PublicFields)] T>(T? enumValue) where T : struct, Enum
+#else
+        public static string? GetString<T>(T? enumValue) where T : struct, Enum
+#endif
+            => EnumConverter<T>.GetString(enumValue);
+    }
+
     /// <summary>
     /// Converter for enum values. Enums entries should be noted with a MapAttribute to map the enum value to a string value
     /// </summary>
-    public class EnumConverter : JsonConverterFactory
+#if NET5_0_OR_GREATER
+    public class EnumConverter<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicParameterlessConstructor | DynamicallyAccessedMemberTypes.PublicFields)] T>
+#else
+    public class EnumConverter<T>
+#endif
+         : JsonConverter<T>, INullableConverterFactory where T : struct, Enum
     {
-        private bool _warnOnMissingEntry = true;
-        private bool _writeAsInt;
-        private static readonly ConcurrentDictionary<Type, List<KeyValuePair<object, string>>> _mapping = new();
-
-        /// <summary>
-        /// </summary>
-        public EnumConverter() { }
-
-        /// <summary>
-        /// </summary>
-        /// <param name="writeAsInt"></param>
-        /// <param name="warnOnMissingEntry"></param>
-        public EnumConverter(bool writeAsInt, bool warnOnMissingEntry)
+        class EnumMapping
         {
-            _writeAsInt = writeAsInt;
-            _warnOnMissingEntry = warnOnMissingEntry;
-        }
+            public T Value { get; set; }
+            public string StringValue { get; set; }
 
-        /// <inheritdoc />
-        public override bool CanConvert(Type typeToConvert)
-        {
-            return typeToConvert.IsEnum || Nullable.GetUnderlyingType(typeToConvert)?.IsEnum == true;
-        }
-
-        /// <inheritdoc />
-        public override JsonConverter? CreateConverter(Type typeToConvert, JsonSerializerOptions options)
-        {
-            JsonConverter converter = (JsonConverter)Activator.CreateInstance(
-                typeof(EnumConverterInner<>).MakeGenericType(
-                    new Type[] { typeToConvert }),
-                BindingFlags.Instance | BindingFlags.Public,
-                binder: null,
-                args: new object[] { _writeAsInt, _warnOnMissingEntry },
-                culture: null)!;
-
-            return converter;
-        }
-
-        private static List<KeyValuePair<object, string>> AddMapping(Type objectType)
-        {
-            var mapping = new List<KeyValuePair<object, string>>();
-            var enumMembers = objectType.GetMembers();
-            foreach (var member in enumMembers)
+            public EnumMapping(T value, string stringValue)
             {
-                var maps = member.GetCustomAttributes(typeof(MapAttribute), false);
-                foreach (MapAttribute attribute in maps)
-                {
-                    foreach (var value in attribute.Values)
-                        mapping.Add(new KeyValuePair<object, string>(Enum.Parse(objectType, member.Name), value));
-                }
+                Value = value;
+                StringValue = stringValue;
             }
-            _mapping.TryAdd(objectType, mapping);
-            return mapping;
         }
 
-        private class EnumConverterInner<T> : JsonConverter<T>
+#if NET8_0_OR_GREATER
+        private static FrozenSet<EnumMapping>? _mappingToEnum = null;
+        private static FrozenDictionary<T, string>? _mappingToString = null;
+#else
+        private static List<EnumMapping>? _mappingToEnum = null;
+        private static Dictionary<T, string>? _mappingToString = null;
+#endif
+        private NullableEnumConverter? _nullableEnumConverter = null;
+
+        private static ConcurrentBag<string> _unknownValuesWarned = new ConcurrentBag<string>();
+
+        internal class NullableEnumConverter : JsonConverter<T?>
         {
-            private bool _warnOnMissingEntry = true;
-            private bool _writeAsInt;
+            private readonly EnumConverter<T> _enumConverter;
 
-            public EnumConverterInner(bool writeAsInt, bool warnOnMissingEntry)
+            public NullableEnumConverter(EnumConverter<T> enumConverter)
             {
-                _warnOnMissingEntry = warnOnMissingEntry;
-                _writeAsInt = writeAsInt;
+                _enumConverter = enumConverter;
             }
-
             public override T? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
             {
-                var enumType = Nullable.GetUnderlyingType(typeToConvert) ?? typeToConvert;
-                if (!_mapping.TryGetValue(enumType, out var mapping))
-                    mapping = AddMapping(enumType);
-
-                var stringValue = reader.TokenType switch
-                {
-                    JsonTokenType.String => reader.GetString(),
-                    JsonTokenType.Number => reader.GetInt16().ToString(),
-                    JsonTokenType.True => reader.GetBoolean().ToString(),
-                    JsonTokenType.False => reader.GetBoolean().ToString(),
-                    JsonTokenType.Null => null,
-                    _ => throw new Exception("Invalid token type for enum deserialization: " + reader.TokenType)
-                };
-
-                if (string.IsNullOrEmpty(stringValue))
-                {
-                    // Received null value
-                    var emptyResult = GetDefaultValue(typeToConvert, enumType);
-                    if (emptyResult != null)
-                        // If the property we're parsing to isn't nullable there isn't a correct way to return this as null will either throw an exception (.net framework) or the default enum value (dotnet core).
-                        Trace.WriteLine($"{DateTime.Now:yyyy/MM/dd HH:mm:ss:fff} | Warning | Received null enum value, but property type is not a nullable enum. EnumType: {enumType.Name}. If you think {enumType.Name} should be nullable please open an issue on the Github repo");
-
-                    return (T?)emptyResult;
-                }
-
-                if (!GetValue(enumType, mapping, stringValue!, out var result))
-                {
-                    var defaultValue = GetDefaultValue(typeToConvert, enumType);
-                    if (string.IsNullOrWhiteSpace(stringValue))
-                    {
-                        if (defaultValue != null)
-                            // We received an empty string and have no mapping for it, and the property isn't nullable
-                            Trace.WriteLine($"{DateTime.Now:yyyy/MM/dd HH:mm:ss:fff} | Warning | Received empty string as enum value, but property type is not a nullable enum. EnumType: {enumType.Name}. If you think {enumType.Name} should be nullable please open an issue on the Github repo");
-                    }
-                    else
-                    {
-                        // We received an enum value but weren't able to parse it.
-                        if (_warnOnMissingEntry)
-                            Trace.WriteLine($"{DateTime.Now:yyyy/MM/dd HH:mm:ss:fff} | Warning | Cannot map enum value. EnumType: {enumType.Name}, Value: {stringValue}, Known values: {string.Join(", ", mapping.Select(m => m.Value))}. If you think {stringValue} should added please open an issue on the Github repo");
-                    }
-
-                    return (T?)defaultValue;
-                }
-
-                return (T?)result;
+                return _enumConverter.ReadNullable(ref reader, typeToConvert, options, out var isEmptyString);
             }
 
-            public override void Write(Utf8JsonWriter writer, T value, JsonSerializerOptions options)
+            public override void Write(Utf8JsonWriter writer, T? value, JsonSerializerOptions options)
             {
                 if (value == null)
                 {
@@ -139,100 +111,233 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
                 }
                 else
                 {
-                    if (!_writeAsInt)
+                    _enumConverter.Write(writer, value.Value, options);
+                }
+            }
+        }
+
+        /// <inheritdoc />
+        public override T Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            var t = ReadNullable(ref reader, typeToConvert, options, out var isEmptyString);
+            if (t == null)
+            {
+                if (isEmptyString && !_unknownValuesWarned.Contains(null))
+                {
+                    // We received an empty string and have no mapping for it, and the property isn't nullable
+                    LibraryHelpers.StaticLogger?.LogWarning($"Received null or empty enum value, but property type is not a nullable enum. EnumType: {typeof(T).FullName}. If you think {typeof(T).FullName} should be nullable please open an issue on the Github repo");
+                }
+
+                return new T(); // return default value
+            }
+            else
+            {
+                return t.Value;
+            }
+        }
+
+        private T? ReadNullable(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options, out bool isEmptyString)
+        {
+            isEmptyString = false;
+            var enumType = typeof(T);
+            if (_mappingToEnum == null)
+                CreateMapping();
+
+            var stringValue = reader.TokenType switch
+            {
+                JsonTokenType.String => reader.GetString(),
+                JsonTokenType.Number => reader.GetInt32().ToString(),
+                JsonTokenType.True => reader.GetBoolean().ToString(),
+                JsonTokenType.False => reader.GetBoolean().ToString(),
+                JsonTokenType.Null => null,
+                _ => throw new Exception("Invalid token type for enum deserialization: " + reader.TokenType)
+            };
+
+            if (stringValue is null)
+                return null;
+
+            if (!GetValue(enumType, stringValue, out var result))
+            {
+                if (string.IsNullOrWhiteSpace(stringValue))
+                {
+                    isEmptyString = true;
+                }
+                else
+                {
+                    // We received an enum value but weren't able to parse it.
+                    if (!_unknownValuesWarned.Contains(stringValue))
                     {
-                        var stringValue = GetString(value.GetType(), value);
-                        writer.WriteStringValue(stringValue);
+                        _unknownValuesWarned.Add(stringValue!);
+                        LibraryHelpers.StaticLogger?.LogWarning($"Cannot map enum value. EnumType: {enumType.FullName}, Value: {stringValue}, Known values: {string.Join(", ", _mappingToEnum!.Select(m => m.Value))}. If you think {stringValue} should added please open an issue on the Github repo");
                     }
-                    else
+                }
+
+                return null;
+            }
+
+            return result;
+        }
+
+        /// <inheritdoc />
+        public override void Write(Utf8JsonWriter writer, T value, JsonSerializerOptions options)
+        {
+            var stringValue = GetString(value);
+            writer.WriteStringValue(stringValue);
+        }
+
+        private static bool GetValue(Type objectType, string value, out T? result)
+        {
+            if (_mappingToEnum != null)
+            {
+                EnumMapping? mapping = null;
+                // Try match on full equals
+                foreach (var item in _mappingToEnum)
+                {
+                    if (item.StringValue.Equals(value, StringComparison.Ordinal))
                     {
-                        writer.WriteNumberValue((int)Convert.ChangeType(value, typeof(int)));
+                        mapping = item;
+                        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 (objectType.IsDefined(typeof(FlagsAttribute)))
+            {
+                var intValue = int.Parse(value);
+                result = (T)Enum.ToObject(objectType, intValue);
+                return true;
+            }
+
+            if (_unknownValuesWarned.Contains(value))
+            {
+                // Check if it is an known unknown value
+                // Done here to prevent lookup overhead for normal conversions, but prevent expensive exception throwing
+                result = default;
+                return false;
+            }
+
+            if (String.IsNullOrEmpty(value))
+            {
+                // An empty/null value will always fail when parsing, so just return here
+                result = default;
+                return false;
+            }
+
+            try
+            {
+                // If no explicit mapping is found try to parse string
+                result = (T)Enum.Parse(objectType, value, true);
+                return true;
+            }
+            catch (Exception)
+            {
+                result = default;
+                return false;
+            }
+        }
+
+        private static void CreateMapping()
+        {
+            var mappingToEnum = new List<EnumMapping>();
+            var mappingToString = new Dictionary<T, string>();
+
+            var enumType = Nullable.GetUnderlyingType(typeof(T)) ?? typeof(T);
+            var enumMembers = enumType.GetFields();
+            foreach (var member in enumMembers)
+            {
+                var maps = member.GetCustomAttributes(typeof(MapAttribute), false);
+                foreach (MapAttribute attribute in maps)
+                {
+                    foreach (var value in attribute.Values)
+                    {
+                        var enumVal = (T)Enum.Parse(enumType, member.Name);
+                        mappingToEnum.Add(new EnumMapping(enumVal, value));
+                        if (!mappingToString.ContainsKey(enumVal))
+                            mappingToString.Add(enumVal, value);
                     }
                 }
             }
 
-            private static object? GetDefaultValue(Type objectType, Type enumType)
-            {
-                if (Nullable.GetUnderlyingType(objectType) != null)
-                    return null;
-
-                return Activator.CreateInstance(enumType); // return default value
-            }
-
-            private static bool GetValue(Type objectType, List<KeyValuePair<object, string>> enumMapping, string value, out object? result)
-            {
-                // Check for exact match first, then if not found fallback to a case insensitive match 
-                var mapping = enumMapping.FirstOrDefault(kv => kv.Value.Equals(value, StringComparison.InvariantCulture));
-                if (mapping.Equals(default(KeyValuePair<object, string>)))
-                    mapping = enumMapping.FirstOrDefault(kv => kv.Value.Equals(value, StringComparison.InvariantCultureIgnoreCase));
-
-                if (!mapping.Equals(default(KeyValuePair<object, string>)))
-                {
-                    result = mapping.Key;
-                    return true;
-                }
-
-                try
-                {
-                    // If no explicit mapping is found try to parse string
-                    result = Enum.Parse(objectType, value, true);
-                    return true;
-                }
-                catch (Exception)
-                {
-                    result = default;
-                    return false;
-                }
-            }
+#if NET8_0_OR_GREATER
+            _mappingToEnum = mappingToEnum.ToFrozenSet();
+            _mappingToString = mappingToString.ToFrozenDictionary();
+#else
+            _mappingToEnum = mappingToEnum;
+            _mappingToString = mappingToString;
+#endif
         }
 
         /// <summary>
         /// Get the string value for an enum value using the MapAttribute mapping. When multiple values are mapped for a enum entry the first value will be returned
         /// </summary>
-        /// <typeparam name="T"></typeparam>
         /// <param name="enumValue"></param>
         /// <returns></returns>
         [return: NotNullIfNotNull("enumValue")]
-        public static string? GetString<T>(T enumValue) => GetString(typeof(T), enumValue);
-
-        /// <summary>
-        /// Get the string value for an enum value using the MapAttribute mapping. When multiple values are mapped for a enum entry the first value will be returned
-        /// </summary>
-        /// <param name="objectType"></param>
-        /// <param name="enumValue"></param>
-        /// <returns></returns>
-        [return: NotNullIfNotNull("enumValue")]
-        public static string? GetString(Type objectType, object? enumValue)
+        public static string? GetString(T? enumValue)
         {
-            objectType = Nullable.GetUnderlyingType(objectType) ?? objectType;
+            if (_mappingToString == null)
+                CreateMapping();
 
-            if (!_mapping.TryGetValue(objectType, out var mapping))
-                mapping = AddMapping(objectType);
-
-            return enumValue == null ? null : (mapping.FirstOrDefault(v => v.Key.Equals(enumValue)).Value ?? enumValue.ToString());
+            return enumValue == null ? null : (_mappingToString!.TryGetValue(enumValue.Value, out var str) ? str : enumValue.ToString());
         }
 
         /// <summary>
         /// Get the enum value from a string
         /// </summary>
-        /// <typeparam name="T">Enum type</typeparam>
         /// <param name="value">String value</param>
         /// <returns></returns>
-        public static T? ParseString<T>(string value) where T : Enum
+        public static T? ParseString(string value)
         {
-            var type = typeof(T);
-            if (!_mapping.TryGetValue(type, out var enumMapping))
-                enumMapping = AddMapping(type);
+            var type = Nullable.GetUnderlyingType(typeof(T)) ?? typeof(T);
+            if (_mappingToEnum == null)
+                CreateMapping();
 
-            var mapping = enumMapping.FirstOrDefault(kv => kv.Value.Equals(value, StringComparison.InvariantCulture));
-            if (mapping.Equals(default(KeyValuePair<object, string>)))
-                mapping = enumMapping.FirstOrDefault(kv => kv.Value.Equals(value, StringComparison.InvariantCultureIgnoreCase));
-
-            if (!mapping.Equals(default(KeyValuePair<object, string>)))
+            EnumMapping? mapping = null;
+            // Try match on full equals
+            foreach(var item in _mappingToEnum!)
             {
-                return (T)mapping.Key;
+                if (item.StringValue.Equals(value, StringComparison.Ordinal))
+                {
+                    mapping = item;
+                    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)
+                return mapping.Value;
+
             try
             {
                 // If no explicit mapping is found try to parse string
@@ -243,5 +348,12 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
                 return default;
             }
         }
+
+        /// <inheritdoc />
+        public JsonConverter CreateNullableConverter()
+        {
+            _nullableEnumConverter ??= new NullableEnumConverter(this);
+            return _nullableEnumConverter;
+        }
     }
 }

CryptoExchange.Net/Converters/SystemTextJson/EnumIntWriterConverter.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace CryptoExchange.Net.Converters.SystemTextJson
+{
+    /// <summary>
+    /// Converter for serializing enum values as int
+    /// </summary>
+    public class EnumIntWriterConverter<T> : JsonConverter<T> where T: struct, Enum
+    {
+        /// <inheritdoc />
+        public override T Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            throw new NotImplementedException();
+        }
+
+        /// <inheritdoc />
+        public override void Write(Utf8JsonWriter writer, T value, JsonSerializerOptions options)
+            => writer.WriteNumberValue((int)(object)value);
+    }
+}

CryptoExchange.Net/Converters/SystemTextJson/INullableConverterFactory.cs

@@ -0,0 +1,9 @@
+using System.Text.Json.Serialization;
+
+namespace CryptoExchange.Net.Converters.SystemTextJson
+{
+    internal interface INullableConverterFactory
+    {
+        JsonConverter CreateNullableConverter();
+    }
+}

CryptoExchange.Net/Converters/SystemTextJson/JsonConverterCtorAttribute.cs

@@ -1,27 +0,0 @@
-using System;
-using System.Text.Json.Serialization;
-
-namespace CryptoExchange.Net.Converters.SystemTextJson
-{
-    /// <summary>
-    /// Attribute for allowing specifying a JsonConverter with constructor parameters
-    /// </summary>
-    /// <typeparam name="T"></typeparam>
-    [AttributeUsage(AttributeTargets.Property)]
-    public class JsonConverterCtorAttribute<T> : JsonConverterAttribute where T : JsonConverter
-    {
-        private readonly object[] _parameters;
-
-        /// <summary>
-        /// ctor
-        /// </summary>
-        public JsonConverterCtorAttribute(params object[] parameters) => _parameters = parameters;
-
-        /// <inheritdoc />
-        public override JsonConverter CreateConverter(Type typeToConvert)
-        {
-            return (T)Activator.CreateInstance(typeof(T), _parameters);
-        }
-    }
-
-}

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

@@ -0,0 +1,117 @@
+using CryptoExchange.Net.Converters.MessageParsing.DynamicConverters;
+using CryptoExchange.Net.Objects;
+using CryptoExchange.Net.Objects.Errors;
+using System;
+using System.Diagnostics.CodeAnalysis;
+using System.IO;
+using System.Linq;
+using System.Net.Http.Headers;
+using System.Text.Json;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace CryptoExchange.Net.Converters.SystemTextJson.MessageHandlers
+{
+    /// <summary>
+    /// JSON REST message handler
+    /// </summary>
+    public abstract class JsonRestMessageHandler : IRestMessageHandler
+    {
+        private static MediaTypeWithQualityHeaderValue _acceptJsonContent = new MediaTypeWithQualityHeaderValue(Constants.JsonContentHeader);
+
+        /// <summary>
+        /// Empty rate limit error
+        /// </summary>
+        protected static readonly ServerRateLimitError _emptyRateLimitError = new ServerRateLimitError();
+
+        /// <inheritdoc />
+        public virtual bool RequiresSeekableStream => false;
+
+        /// <summary>
+        /// The serializer options to use
+        /// </summary>
+        public abstract JsonSerializerOptions Options { get; }
+
+        /// <inheritdoc />
+        public MediaTypeWithQualityHeaderValue AcceptHeader => _acceptJsonContent;
+
+        /// <inheritdoc />
+        public virtual ValueTask<ServerRateLimitError> ParseErrorRateLimitResponse(
+            int httpStatusCode,
+            HttpResponseHeaders responseHeaders,
+            Stream responseStream)
+        {
+            // Handle retry after header
+            var retryAfterHeader = responseHeaders.SingleOrDefault(r => r.Key.Equals("Retry-After", StringComparison.InvariantCultureIgnoreCase));
+            if (retryAfterHeader.Value?.Any() != true)
+                return new ValueTask<ServerRateLimitError>(_emptyRateLimitError);
+
+            var value = retryAfterHeader.Value.First();
+            if (int.TryParse(value, out var seconds))
+                return new ValueTask<ServerRateLimitError>(new ServerRateLimitError() { RetryAfter = DateTime.UtcNow.AddSeconds(seconds) });
+
+            if (DateTime.TryParse(value, out var datetime))
+                return new ValueTask<ServerRateLimitError>(new ServerRateLimitError() { RetryAfter = datetime });
+
+            return new ValueTask<ServerRateLimitError>(_emptyRateLimitError);
+        }
+
+        /// <inheritdoc />
+        public abstract ValueTask<Error> ParseErrorResponse(
+            int httpStatusCode,
+            HttpResponseHeaders responseHeaders,
+            Stream responseStream);
+
+        /// <inheritdoc />
+        public virtual ValueTask<Error?> CheckForErrorResponse(
+            RequestDefinition request,
+            HttpResponseHeaders responseHeaders,
+            Stream responseStream) => new ValueTask<Error?>((Error?)null);
+
+        /// <summary>
+        /// Read the response into a JsonDocument object
+        /// </summary>
+        protected virtual async ValueTask<(Error?, JsonDocument?)> GetJsonDocument(Stream stream)
+        {
+            try
+            {
+                var document = await JsonDocument.ParseAsync(stream).ConfigureAwait(false);
+                return (null, document);
+            }
+            catch (Exception ex)
+            {
+                return (new ServerError(new ErrorInfo(ErrorType.DeserializationFailed, false, "Deserialization failed, invalid JSON"), ex), null);
+            }
+        }
+
+        /// <inheritdoc />
+#if NET5_0_OR_GREATER
+        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL3050:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
+        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2026:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
+#endif
+        public async ValueTask<(T? Result, Error? Error)> TryDeserializeAsync<T>(Stream responseStream, CancellationToken cancellationToken)
+        {
+            try
+            {
+#pragma warning disable IL2026 // Members annotated with 'RequiresUnreferencedCodeAttribute' require dynamic access otherwise can break functionality when trimming application code
+#pragma warning disable IL3050 // Calling members annotated with 'RequiresDynamicCodeAttribute' may break functionality when AOT compiling.
+                var result = await JsonSerializer.DeserializeAsync<T>(responseStream, Options)!.ConfigureAwait(false)!;
+#pragma warning restore IL3050 // Calling members annotated with 'RequiresDynamicCodeAttribute' may break functionality when AOT compiling.
+#pragma warning restore IL2026 // Members annotated with 'RequiresUnreferencedCodeAttribute' require dynamic access otherwise can break functionality when trimming application code
+                return (result, null);
+            }            
+            catch (JsonException ex)
+            {
+                var info = $"Json deserialization failed: {ex.Message}, Path: {ex.Path}, LineNumber: {ex.LineNumber}, LinePosition: {ex.BytePositionInLine}";
+                return (default, new DeserializeError(info, ex));
+            }
+            catch (Exception ex)
+            {
+                return (default, new DeserializeError($"Json deserialization failed: {ex.Message}", ex));
+            }
+        }
+
+        /// <inheritdoc />
+        public virtual Error? CheckDeserializedResponse<T>(HttpResponseHeaders responseHeaders, T result) => null;
+    }
+}

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

@@ -0,0 +1,348 @@
+using CryptoExchange.Net.Converters.MessageParsing.DynamicConverters;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
+using System.Linq;
+using System.Net.WebSockets;
+using System.Text;
+using System.Text.Json;
+
+namespace CryptoExchange.Net.Converters.SystemTextJson.MessageHandlers
+{
+    /// <summary>
+    /// JSON WebSocket message handler, sequentially read the JSON and looks for specific predefined fields to identify the message
+    /// </summary>
+    public abstract class JsonSocketMessageHandler : ISocketMessageHandler
+    {
+        /// <summary>
+        /// The serializer options to use
+        /// </summary>
+        public abstract JsonSerializerOptions Options { get; }
+
+        /// <summary>
+        /// Message evaluators
+        /// </summary>
+        protected abstract MessageTypeDefinition[] TypeEvaluators { get; }
+
+        private readonly SearchResult _searchResult = new();
+
+        private bool _hasArraySearches;
+        private bool _initialized;
+        private int _maxSearchDepth;
+        private MessageTypeDefinition? _topEvaluator;
+        private List<MessageEvalutorFieldReference>? _searchFields;
+        private Dictionary<Type, Func<object, string?>>? _baseTypeMapping;
+        private Dictionary<Type, Func<object, string?>>? _mapping;
+
+        /// <summary>
+        /// Add a mapping of a specific object of a type to a specific topic
+        /// </summary>
+        /// <typeparam name="T">Type to get topic for</typeparam>
+        /// <param name="mapping">The topic retrieve delegate</param>
+        protected void AddTopicMapping<T>(Func<T, string?> mapping)
+        {
+            _mapping ??= new Dictionary<Type, Func<object, string?>>();
+            _mapping.Add(typeof(T), x => mapping((T)x));
+        }
+
+        private void InitializeConverter()
+        {
+            if (_initialized)
+                return;
+
+            _maxSearchDepth = int.MinValue;
+            _searchFields = new List<MessageEvalutorFieldReference>();
+            foreach (var evaluator in TypeEvaluators)
+            {
+                _topEvaluator ??= evaluator;
+                foreach (var field in evaluator.Fields)
+                {
+                    var overlapping = _searchFields.Where(otherField =>
+                    {
+                        if (field is PropertyFieldReference propRef
+                            && otherField.Field is PropertyFieldReference otherPropRef)
+                        {
+                            return field.Depth == otherPropRef.Depth && propRef.PropertyName.SequenceEqual(otherPropRef.PropertyName);
+                        }
+                        else if (field is ArrayFieldReference arrayRef
+                            && otherField.Field is ArrayFieldReference otherArrayPropRef)
+                        {
+                            return field.Depth == otherArrayPropRef.Depth && arrayRef.ArrayIndex == otherArrayPropRef.ArrayIndex;
+                        }
+
+                        return false;
+                    }).ToList();
+
+                    if (overlapping.Any())
+                    {
+                        foreach (var overlap in overlapping)
+                            overlap.OverlappingField = true;
+                    }
+
+                    List<MessageEvalutorFieldReference>? existingSameSearchField = new();
+                    if (field is ArrayFieldReference arrayField)
+                    {
+                        _hasArraySearches = true;
+                        existingSameSearchField = _searchFields.Where(x =>
+                            x.Field is ArrayFieldReference arrayFieldRef
+                            && arrayFieldRef.ArrayIndex == arrayField.ArrayIndex
+                            && arrayFieldRef.Depth == arrayField.Depth
+                            && arrayFieldRef.Constraint == null && arrayField.Constraint == null).ToList();
+                    }
+                    else if (field is PropertyFieldReference propField)
+                    {
+                        existingSameSearchField = _searchFields.Where(x =>
+                            x.Field is PropertyFieldReference propFieldRef
+                            && propFieldRef.PropertyName.SequenceEqual(propField.PropertyName)
+                            && propFieldRef.Depth == propField.Depth
+                            && propFieldRef.Constraint == null && propFieldRef.Constraint == null).ToList();
+                    }
+
+                    foreach(var sameSearchField in existingSameSearchField)
+                    {
+                        if (sameSearchField.SkipReading == true
+                            && (evaluator.TypeIdentifierCallback != null || field.Constraint != null))
+                        {
+                            sameSearchField.SkipReading = false;
+                        }
+
+                        if (evaluator.ForceIfFound)
+                        {
+                            if (evaluator.Fields.Length > 1 || sameSearchField.ForceEvaluator != null)
+                                throw new Exception("Invalid config");
+
+                            //sameSearchField.ForceEvaluator = evaluator;
+                        }
+                    }
+
+                    _searchFields.Add(new MessageEvalutorFieldReference(field)
+                    {
+                        SkipReading = evaluator.TypeIdentifierCallback == null && field.Constraint == null,
+                        ForceEvaluator = !existingSameSearchField.Any() ? evaluator.ForceIfFound ? evaluator : null : null,
+                        OverlappingField = overlapping.Any()
+                    });
+
+                    if (field.Depth > _maxSearchDepth)
+                        _maxSearchDepth = field.Depth;
+                }
+            }
+
+            _initialized = true;
+        }
+
+        /// <inheritdoc />
+        public virtual string? GetTopicFilter(object deserializedObject)
+        {
+            if (_mapping == null)
+                return null;
+
+            // Cache the found type for future 
+            var currentType = deserializedObject.GetType();
+            if (_baseTypeMapping != null)
+            {
+                if (_baseTypeMapping.TryGetValue(currentType, out var typeMapping))
+                    return typeMapping(deserializedObject);
+            }
+
+            var mappedBase = false;
+            while (currentType != null)
+            {
+                if (_mapping.TryGetValue(currentType, out var mapping))
+                {
+                    if (mappedBase) 
+                    {
+                        _baseTypeMapping ??= new Dictionary<Type, Func<object, string?>>();
+                        _baseTypeMapping.Add(deserializedObject.GetType(), mapping);
+                    }
+
+                    return mapping(deserializedObject);
+                }
+
+                mappedBase = true;
+                currentType = currentType.BaseType;
+            }
+
+            return null;
+        }
+
+        /// <inheritdoc />
+        public virtual string? GetTypeIdentifier(ReadOnlySpan<byte> data, WebSocketMessageType? webSocketMessageType)
+        {
+            InitializeConverter();
+
+            int? arrayIndex = null;
+
+            _searchResult.Clear();
+            var reader = new Utf8JsonReader(data);
+            while (reader.Read())
+            {
+                if ((reader.TokenType == JsonTokenType.StartArray
+                    || reader.TokenType == JsonTokenType.StartObject)
+                    && reader.CurrentDepth == _maxSearchDepth)
+                {
+                    // There is no field we need to search for on a depth deeper than this, skip
+                    reader.Skip();
+                    continue;
+                }
+
+                if (reader.TokenType == JsonTokenType.StartArray)
+                    arrayIndex = -1;
+                else if (reader.TokenType == JsonTokenType.EndArray)
+                    arrayIndex = null;
+                else if (arrayIndex != null)
+                    arrayIndex++;
+
+                if (reader.TokenType == JsonTokenType.PropertyName
+                    || arrayIndex != null && _hasArraySearches)
+                {
+                    bool written = false;
+
+                    string? value = null;
+                    byte[]? propName = null;
+                    foreach (var field in _searchFields!)
+                    {
+                        if (field.Field.Depth != reader.CurrentDepth)
+                            continue;
+
+                        bool readArrayValues = false;
+                        if (field.Field is PropertyFieldReference propFieldRef)
+                        {
+                            if (propName == null)
+                            {
+                                if (reader.TokenType != JsonTokenType.PropertyName)
+                                    continue;
+
+                                if (!reader.ValueTextEquals(propFieldRef.PropertyName))
+                                    continue;
+
+                                propName = propFieldRef.PropertyName;
+                                readArrayValues = propFieldRef.ArrayValues;
+                                reader.Read();
+                            }
+                            else if (!propFieldRef.PropertyName.SequenceEqual(propName))
+                            {
+                                continue;
+                            }
+                        }
+                        else if (field.Field is ArrayFieldReference arrayFieldRef)
+                        {
+                            if (propName != null)
+                                continue;
+
+                            if (reader.TokenType == JsonTokenType.PropertyName)
+                                continue;
+
+                            if (arrayFieldRef.ArrayIndex != arrayIndex)
+                                continue;
+                        }
+
+                        if (!field.SkipReading)
+                        {
+                            if (value == null)
+                            {
+                                if (readArrayValues)
+                                {
+                                    if (reader.TokenType != JsonTokenType.StartArray)
+                                        // error
+                                        return null;
+
+                                    var sb = new StringBuilder();
+                                    reader.Read();// Read start array
+                                    bool first = true;
+                                    while(reader.TokenType != JsonTokenType.EndArray)
+                                    {
+                                        if (!first)
+                                            sb.Append(",");
+
+                                        first = false;
+                                        sb.Append(reader.GetString());
+                                        reader.Read();
+                                    }
+
+                                    value = first ? null : sb.ToString();
+                                }
+                                else
+                                {
+                                    switch (reader.TokenType)
+                                    {
+                                        case JsonTokenType.Number:
+                                            value = reader.GetDecimal().ToString();
+                                            break;
+                                        case JsonTokenType.String:
+                                            value = reader.GetString()!;
+                                            break;
+                                        case JsonTokenType.True:
+                                        case JsonTokenType.False:
+                                            value = reader.GetBoolean().ToString()!;
+                                            break;
+                                        case JsonTokenType.Null:
+                                            value = null;
+                                            break;
+                                        case JsonTokenType.StartObject:
+                                        case JsonTokenType.StartArray:
+                                            value = null;
+                                            break;
+                                        default:
+                                            continue;
+                                    }
+                                }
+                            }
+
+                            if (field.Field.Constraint != null
+                                && !field.Field.Constraint(value))
+                            {
+                                continue;
+                            }
+                        }
+
+                        _searchResult.Write(field.Field, value);
+
+                        if (field.ForceEvaluator != null)
+                        {
+                            if (field.ForceEvaluator.StaticIdentifier != null)
+                                return field.ForceEvaluator.StaticIdentifier;
+
+                            // Force the immediate return upon encountering this field
+                            return field.ForceEvaluator.GetMessageType(_searchResult);
+                        }
+
+                        written = true;
+                        if (!field.OverlappingField)
+                            break;
+                    }
+
+                    if (!written)
+                        continue;
+
+                    if (_topEvaluator!.Satisfied(_searchResult))
+                        return _topEvaluator.GetMessageType(_searchResult);
+
+                    if (_searchFields.Count == _searchResult.Count)
+                        break;
+                }
+            }
+
+            foreach (var evaluator in TypeEvaluators)
+            {
+                if (evaluator.Satisfied(_searchResult))
+                    return evaluator.GetMessageType(_searchResult);
+            }
+
+            return null;
+        }
+
+        /// <inheritdoc />
+#if NET5_0_OR_GREATER
+        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL3050:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
+        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2026:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
+#endif
+        public virtual object Deserialize(ReadOnlySpan<byte> data, Type type)
+        {
+#pragma warning disable IL2026 // Members annotated with 'RequiresUnreferencedCodeAttribute' require dynamic access otherwise can break functionality when trimming application code
+#pragma warning disable IL3050 // Calling members annotated with 'RequiresDynamicCodeAttribute' may break functionality when AOT compiling.
+            return JsonSerializer.Deserialize(data, type, Options)!;
+#pragma warning restore IL3050 // Calling members annotated with 'RequiresDynamicCodeAttribute' may break functionality when AOT compiling.
+#pragma warning restore IL2026 // Members annotated with 'RequiresUnreferencedCodeAttribute' require dynamic access otherwise can break functionality when trimming application code
+        }
+    }
+}

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

@@ -0,0 +1,63 @@
+using CryptoExchange.Net.Converters.MessageParsing.DynamicConverters;
+using System;
+using System.Net.WebSockets;
+using System.Text.Json;
+
+namespace CryptoExchange.Net.Converters.SystemTextJson.MessageHandlers
+{
+    /// <summary>
+    /// JSON WebSocket message handler, reads the json data info a JsonDocument after which the data can be inspected to identify the message
+    /// </summary>
+    public abstract class JsonSocketPreloadMessageHandler : ISocketMessageHandler
+    {
+        /// <summary>
+        /// The serializer options to use
+        /// </summary>
+        public abstract JsonSerializerOptions Options { get; }
+
+        /// <inheritdoc />
+        public virtual string? GetTypeIdentifier(ReadOnlySpan<byte> data, WebSocketMessageType? webSocketMessageType)
+        {
+            var reader = new Utf8JsonReader(data);
+            var jsonDocument = JsonDocument.ParseValue(ref reader);
+
+            return GetTypeIdentifier(jsonDocument);
+        }
+
+        /// <summary>
+        /// Get the message identifier for this document
+        /// </summary>
+        protected abstract string? GetTypeIdentifier(JsonDocument document);
+
+        /// <summary>
+        /// Get optional topic filter, for example a symbol name
+        /// </summary>
+        public virtual string? GetTopicFilter(object deserializedObject) => null;
+
+        /// <inheritdoc />
+        public virtual object Deserialize(ReadOnlySpan<byte> data, Type type)
+        {
+#pragma warning disable IL2026 // Members annotated with 'RequiresUnreferencedCodeAttribute' require dynamic access otherwise can break functionality when trimming application code
+#pragma warning disable IL3050 // Calling members annotated with 'RequiresDynamicCodeAttribute' may break functionality when AOT compiling.
+            return JsonSerializer.Deserialize(data, type, Options)!;
+#pragma warning restore IL3050 // Calling members annotated with 'RequiresDynamicCodeAttribute' may break functionality when AOT compiling.
+#pragma warning restore IL2026 // Members annotated with 'RequiresUnreferencedCodeAttribute' require dynamic access otherwise can break functionality when trimming application code
+        }
+
+        /// <summary>
+        /// Get the string value for a path, or an emtpy string if not found
+        /// </summary>
+        protected string StringOrEmpty(JsonDocument document, string path)
+        {
+            if (!document.RootElement.TryGetProperty(path, out var element))
+                return string.Empty;
+
+            if (element.ValueKind == JsonValueKind.String)
+                return element.GetString() ?? string.Empty;
+            else if (element.ValueKind == JsonValueKind.Number)
+                return element.GetDecimal().ToString();
+
+            return string.Empty;
+        }
+    }
+}

CryptoExchange.Net/Converters/SystemTextJson/NullableEnumConverterFactory.cs

@@ -0,0 +1,41 @@
+using System;
+using System.Text.Json.Serialization.Metadata;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace CryptoExchange.Net.Converters.SystemTextJson
+{
+    internal class NullableEnumConverterFactory : JsonConverterFactory
+    {
+        private readonly IJsonTypeInfoResolver _jsonTypeInfoResolver;
+        private static readonly JsonSerializerOptions _options = new JsonSerializerOptions();
+
+        public NullableEnumConverterFactory(IJsonTypeInfoResolver jsonTypeInfoResolver)
+        {
+            _jsonTypeInfoResolver = jsonTypeInfoResolver;
+        }
+
+        public override bool CanConvert(Type typeToConvert)
+        {
+            var b = Nullable.GetUnderlyingType(typeToConvert);
+            if (b == null)
+                return false;
+
+            var typeInfo = _jsonTypeInfoResolver.GetTypeInfo(b, _options);
+            if (typeInfo == null)
+                return false;
+
+            return typeInfo.Converter is INullableConverterFactory;
+        }
+
+        public override JsonConverter? CreateConverter(Type typeToConvert, JsonSerializerOptions options)
+        {
+            var b = Nullable.GetUnderlyingType(typeToConvert) ?? throw new ArgumentNullException($"Not nullable {typeToConvert.Name}");
+            var typeInfo = _jsonTypeInfoResolver.GetTypeInfo(b, _options) ?? throw new ArgumentNullException($"Can find type {typeToConvert.Name}");
+            if (typeInfo.Converter is not INullableConverterFactory nullConverterFactory)
+                throw new ArgumentNullException($"Can find type converter for {typeToConvert.Name}");
+            
+            return nullConverterFactory.CreateNullableConverter();
+        }
+    }
+}

CryptoExchange.Net/Converters/SystemTextJson/ObjectStringConverter.cs

@@ -1,16 +1,20 @@
 using System;
 using System.Text.Json.Serialization;
 using System.Text.Json;
+using System.Diagnostics.CodeAnalysis;
 
 namespace CryptoExchange.Net.Converters.SystemTextJson
 {
     /// <summary>
-    /// 
+    /// Converter for values which contain a nested json value
     /// </summary>
-    /// <typeparam name="T"></typeparam>
     public class ObjectStringConverter<T> : JsonConverter<T>
     {
         /// <inheritdoc />
+#if NET5_0_OR_GREATER
+        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL3050:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
+        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2026:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
+#endif
         public override T? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
         {
             if (reader.TokenType == JsonTokenType.Null)
@@ -20,10 +24,14 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
             if (string.IsNullOrEmpty(value))
                 return default;
 
-            return (T?)JsonDocument.Parse(value!).Deserialize(typeof(T));
+            return (T?)JsonDocument.Parse(value!).Deserialize(typeof(T), options);
         }
 
         /// <inheritdoc />
+#if NET5_0_OR_GREATER
+        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL3050:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
+        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2026:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
+#endif
         public override void Write(Utf8JsonWriter writer, T? value, JsonSerializerOptions options)
         {
             if (value is null)

CryptoExchange.Net/Converters/SystemTextJson/ReplaceConverter.cs

@@ -8,7 +8,7 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
     /// <summary>
     /// Replace a value on a string property
     /// </summary>
-    public class ReplaceConverter : JsonConverter<string>
+    public abstract class ReplaceConverter : JsonConverter<string>
     {
         private readonly (string ValueToReplace, string ValueToReplaceWith)[] _replacementSets;
 

CryptoExchange.Net/Converters/SystemTextJson/SerializationModel.cs

@@ -0,0 +1,21 @@
+using System;
+
+namespace CryptoExchange.Net.Converters.SystemTextJson
+{
+    /// <summary>
+    /// Attribute to mark a model as json serializable. Used for AOT compilation.
+    /// </summary>
+    [AttributeUsage(System.AttributeTargets.Class | AttributeTargets.Enum | System.AttributeTargets.Interface)]
+    public class SerializationModelAttribute : Attribute
+    {
+        /// <summary>
+        /// ctor
+        /// </summary>
+        public SerializationModelAttribute() { }
+        /// <summary>
+        /// ctor
+        /// </summary>
+        /// <param name="type"></param>
+        public SerializationModelAttribute(Type type) { }
+    }
+}

CryptoExchange.Net/Converters/SystemTextJson/SerializerOptions.cs

@@ -1,4 +1,5 @@
-using System.Text.Json;
+using System.Collections.Concurrent;
+using System.Text.Json;
 using System.Text.Json.Serialization;
 
 namespace CryptoExchange.Net.Converters.SystemTextJson
@@ -8,22 +9,39 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
     /// </summary>
     public static class SerializerOptions
     {
+        private static readonly ConcurrentDictionary<JsonSerializerContext, JsonSerializerOptions> _cache = new ConcurrentDictionary<JsonSerializerContext, JsonSerializerOptions>();
+
         /// <summary>
-        /// Json serializer settings which includes the EnumConverter, DateTimeConverter, BoolConverter and DecimalConverter
+        /// Get Json serializer settings which includes standard converters for DateTime, bool, enum and number types
         /// </summary>
-        public static JsonSerializerOptions WithConverters { get; } = new JsonSerializerOptions
+        public static JsonSerializerOptions WithConverters(JsonSerializerContext typeResolver, params JsonConverter[] additionalConverters)
         {
-            NumberHandling = JsonNumberHandling.AllowReadingFromString | JsonNumberHandling.AllowNamedFloatingPointLiterals,
-            PropertyNameCaseInsensitive = false,
-            Converters =
+            if (!_cache.TryGetValue(typeResolver, out var options))
+            {
+                options = new JsonSerializerOptions
+                {
+                    NumberHandling = JsonNumberHandling.AllowReadingFromString | JsonNumberHandling.AllowNamedFloatingPointLiterals,
+                    PropertyNameCaseInsensitive = false,
+                    Converters =
                     {
                         new DateTimeConverter(),
-                        new EnumConverter(),
                         new BoolConverter(),
                         new DecimalConverter(),
                         new IntConverter(),
-                        new LongConverter()
-                    }
-        };
+                        new LongConverter(),
+                        new NullableEnumConverterFactory(typeResolver)
+                    },
+                    TypeInfoResolver = typeResolver,
+                };
+
+                foreach (var converter in additionalConverters)
+                    options.Converters.Add(converter);
+
+                options.TypeInfoResolver = typeResolver;
+                _cache.TryAdd(typeResolver, options);
+            }
+
+            return options;
+        }
     }
 }

CryptoExchange.Net/Converters/SystemTextJson/SharedQuantityConverter.cs

@@ -0,0 +1,58 @@
+using CryptoExchange.Net.SharedApis;
+using System;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace CryptoExchange.Net.Converters.SystemTextJson
+{
+    internal class SharedQuantityConverter : SharedQuantityReferenceConverter<SharedQuantity> { }
+    internal class SharedOrderQuantityConverter : SharedQuantityReferenceConverter<SharedOrderQuantity> { }
+
+    internal class SharedQuantityReferenceConverter<T> : JsonConverter<T> where T: SharedQuantityReference, new()
+    {
+        public override T? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            if (reader.TokenType != JsonTokenType.StartArray)
+                throw new Exception("");
+
+            reader.Read(); // Start array
+            var baseQuantity = reader.TokenType == JsonTokenType.Null ? (decimal?)null : reader.GetDecimal();
+            reader.Read();
+            var quoteQuantity = reader.TokenType == JsonTokenType.Null ? (decimal?)null : reader.GetDecimal();
+            reader.Read();
+            var contractQuantity = reader.TokenType == JsonTokenType.Null ? (decimal?)null : reader.GetDecimal();
+            reader.Read();
+
+            if (reader.TokenType != JsonTokenType.EndArray)
+                throw new Exception("");
+
+            reader.Read(); // End array
+
+            var result = new T();
+            result.QuantityInBaseAsset = baseQuantity;
+            result.QuantityInQuoteAsset = quoteQuantity;
+            result.QuantityInContracts = contractQuantity;
+            return result;
+        }
+
+        public override void Write(Utf8JsonWriter writer, T value, JsonSerializerOptions options)
+        {
+            writer.WriteStartArray();
+            if (value.QuantityInBaseAsset == null)
+                writer.WriteNullValue();
+            else
+                writer.WriteNumberValue(value.QuantityInBaseAsset.Value);
+
+            if (value.QuantityInQuoteAsset == null)
+                writer.WriteNullValue();
+            else
+                writer.WriteNumberValue(value.QuantityInQuoteAsset.Value);
+
+            if (value.QuantityInContracts == null)
+                writer.WriteNullValue();
+            else
+                writer.WriteNumberValue(value.QuantityInContracts.Value);
+            writer.WriteEndArray();
+        }
+    }
+}

CryptoExchange.Net/Converters/SystemTextJson/SharedSymbolConverter.cs

@@ -0,0 +1,44 @@
+using CryptoExchange.Net.SharedApis;
+using System;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace CryptoExchange.Net.Converters.SystemTextJson
+{
+    internal class SharedSymbolConverter : JsonConverter<SharedSymbol>
+    {
+        public override SharedSymbol? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            if (reader.TokenType != JsonTokenType.StartArray)
+                throw new Exception("");
+
+            reader.Read(); // Start array
+            var tradingMode = (TradingMode)Enum.Parse(typeof(TradingMode), reader.GetString()!);
+            reader.Read();
+            var baseAsset = reader.GetString()!;
+            reader.Read();
+            var quoteAsset = reader.GetString()!;
+            reader.Read();
+            var timeStr = reader.GetString()!;
+            var deliverTime = string.IsNullOrEmpty(timeStr) ? (DateTime?)null : DateTime.Parse(timeStr);
+            reader.Read();
+
+            if (reader.TokenType != JsonTokenType.EndArray)
+                throw new Exception("");
+
+            reader.Read(); // End array
+
+            return new SharedSymbol(tradingMode, baseAsset, quoteAsset, deliverTime);
+        }
+
+        public override void Write(Utf8JsonWriter writer, SharedSymbol value, JsonSerializerOptions options)
+        {
+            writer.WriteStartArray();
+            writer.WriteStringValue(value.TradingMode.ToString());
+            writer.WriteStringValue(value.BaseAsset);
+            writer.WriteStringValue(value.QuoteAsset);
+            writer.WriteStringValue(value.DeliverTime?.ToString());
+            writer.WriteEndArray();
+        }
+    }
+}

CryptoExchange.Net/Converters/SystemTextJson/SystemTextJsonMessageAccessor.cs

@@ -2,7 +2,7 @@
 using CryptoExchange.Net.Interfaces;
 using CryptoExchange.Net.Objects;
 using System;
-using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.IO;
 using System.Text;
 using System.Text.Json;
@@ -20,10 +20,10 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
         /// </summary>
         protected JsonDocument? _document;
 
-        private static JsonSerializerOptions _serializerOptions = SerializerOptions.WithConverters;
+        private readonly JsonSerializerOptions? _customSerializerOptions;
 
         /// <inheritdoc />
-        public bool IsJson { get; set; }
+        public bool IsValid { get; set; }
 
         /// <inheritdoc />
         public abstract bool OriginalDataAvailable { get; }
@@ -31,10 +31,22 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
         /// <inheritdoc />
         public object? Underlying => throw new NotImplementedException();
 
+        /// <summary>
+        /// ctor
+        /// </summary>
+        public SystemTextJsonMessageAccessor(JsonSerializerOptions options)
+        {
+            _customSerializerOptions = options;
+        }
+
         /// <inheritdoc />
+#if NET5_0_OR_GREATER
+        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2026:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
+        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL3050:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
+#endif
         public CallResult<object> Deserialize(Type type, MessagePath? path = null)
         {
-            if (!IsJson)
+            if (!IsValid)
                 return new CallResult<object>(GetOriginalString());
 
             if (_document == null)
@@ -42,22 +54,25 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
 
             try
             {
-                var result = _document.Deserialize(type, _serializerOptions);
+                var result = _document.Deserialize(type, _customSerializerOptions);
                 return new CallResult<object>(result!);
             }
             catch (JsonException ex)
             {
-                var info = $"Deserialize JsonException: {ex.Message}, Path: {ex.Path}, LineNumber: {ex.LineNumber}, LinePosition: {ex.BytePositionInLine}";
-                return new CallResult<object>(new DeserializeError(info, OriginalDataAvailable ? GetOriginalString() : "[Data only available when OutputOriginal = true in client options]"));
+                var info = $"Json deserialization failed: {ex.Message}, Path: {ex.Path}, LineNumber: {ex.LineNumber}, LinePosition: {ex.BytePositionInLine}";
+                return new CallResult<object>(new DeserializeError(info, ex));
             }
             catch (Exception ex)
             {
-                var info = $"Deserialize unknown Exception: {ex.Message}";
-                return new CallResult<object>(new DeserializeError(info, OriginalDataAvailable ? GetOriginalString() : "[Data only available when OutputOriginal = true in client options]"));
+                return new CallResult<object>(new DeserializeError($"Json deserialization failed: {ex.Message}", ex));
             }
         }
 
         /// <inheritdoc />
+#if NET5_0_OR_GREATER
+        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2026:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
+        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL3050:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
+#endif
         public CallResult<T> Deserialize<T>(MessagePath? path = null)
         {
             if (_document == null)
@@ -65,25 +80,24 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
 
             try
             {
-                var result = _document.Deserialize<T>(_serializerOptions);
+                var result = _document.Deserialize<T>(_customSerializerOptions);
                 return new CallResult<T>(result!);
             }
             catch (JsonException ex)
             {
-                var info = $"Deserialize JsonException: {ex.Message}, Path: {ex.Path}, LineNumber: {ex.LineNumber}, LinePosition: {ex.BytePositionInLine}";
-                return new CallResult<T>(new DeserializeError(info, OriginalDataAvailable ? GetOriginalString() : "[Data only available when OutputOriginal = true in client options]"));
+                var info = $"Json deserialization failed: {ex.Message}, Path: {ex.Path}, LineNumber: {ex.LineNumber}, LinePosition: {ex.BytePositionInLine}";
+                return new CallResult<T>(new DeserializeError(info, ex));
             }
             catch (Exception ex)
             {
-                var info = $"Unknown exception: {ex.Message}";
-                return new CallResult<T>(new DeserializeError(info, OriginalDataAvailable ? GetOriginalString() : "[Data only available when OutputOriginal = true in client options]"));
+                return new CallResult<T>(new DeserializeError($"Json deserialization failed: {ex.Message}", ex));
             }
         }
 
         /// <inheritdoc />
         public NodeType? GetNodeType()
         {
-            if (!IsJson)
+            if (!IsValid)
                 throw new InvalidOperationException("Can't access json data on non-json message");
 
             if (_document == null)
@@ -100,7 +114,7 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
         /// <inheritdoc />
         public NodeType? GetNodeType(MessagePath path)
         {
-            if (!IsJson)
+            if (!IsValid)
                 throw new InvalidOperationException("Can't access json data on non-json message");
 
             var node = GetPathNode(path);
@@ -116,9 +130,13 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
         }
 
         /// <inheritdoc />
+#if NET5_0_OR_GREATER
+        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2026:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
+        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL3050:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
+#endif
         public T? GetValue<T>(MessagePath path)
         {
-            if (!IsJson)
+            if (!IsValid)
                 throw new InvalidOperationException("Can't access json data on non-json message");
 
             var value = GetPathNode(path);
@@ -129,9 +147,10 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
             {
                 try
                 {
-                    return value.Value.Deserialize<T>(_serializerOptions);
+                    return value.Value.Deserialize<T>(_customSerializerOptions);
                 }
                 catch { }
+
                 return default;
             }
 
@@ -141,13 +160,17 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
                     return (T)(object)value.Value.GetInt64().ToString();
             }
 
-            return value.Value.Deserialize<T>();
+            return value.Value.Deserialize<T>(_customSerializerOptions);
         }
 
         /// <inheritdoc />
-        public List<T?>? GetValues<T>(MessagePath path)
+#if NET5_0_OR_GREATER
+        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2026:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
+        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL3050:RequiresUnreferencedCode", Justification = "JsonSerializerOptions provided here has TypeInfoResolver set")]
+#endif
+        public T?[]? GetValues<T>(MessagePath path)
         {
-            if (!IsJson)
+            if (!IsValid)
                 throw new InvalidOperationException("Can't access json data on non-json message");
 
             var value = GetPathNode(path);
@@ -157,12 +180,12 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
             if (value.Value.ValueKind != JsonValueKind.Array)
                 return default;
 
-            return value.Value.Deserialize<List<T>>()!;
+            return value.Value.Deserialize<T[]>(_customSerializerOptions)!;
         }
 
         private JsonElement? GetPathNode(MessagePath path)
         {
-            if (!IsJson)
+            if (!IsValid)
                 throw new InvalidOperationException("Can't access json data on non-json message");
 
             if (_document == null)
@@ -223,6 +246,13 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
         /// <inheritdoc />
         public override bool OriginalDataAvailable => _stream?.CanSeek == true;
 
+        /// <summary>
+        /// ctor
+        /// </summary>
+        public SystemTextJsonStreamMessageAccessor(JsonSerializerOptions options): base(options)
+        {
+        }
+
         /// <inheritdoc />
         public async Task<CallResult> Read(Stream stream, bool bufferStream)
         {
@@ -246,14 +276,14 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
             try
             {
                 _document = await JsonDocument.ParseAsync(_stream ?? stream).ConfigureAwait(false);
-                IsJson = true;
-                return new CallResult(null);
+                IsValid = true;
+                return CallResult.SuccessResult;
             }
             catch (Exception ex)
             {
                 // Not a json message
-                IsJson = false;
-                return new CallResult(new ServerError("JsonError: " + ex.Message));
+                IsValid = false;
+                return new CallResult(new DeserializeError($"Json deserialization failed: {ex.Message}", ex));
             }
         }
 
@@ -286,6 +316,13 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
     {
         private ReadOnlyMemory<byte> _bytes;
 
+        /// <summary>
+        /// ctor
+        /// </summary>
+        public SystemTextJsonByteMessageAccessor(JsonSerializerOptions options) : base(options)
+        {
+        }
+
         /// <inheritdoc />
         public CallResult Read(ReadOnlyMemory<byte> data)
         {
@@ -297,25 +334,25 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
                 if (firstByte != 0x7b && firstByte != 0x5b)
                 {
                     // Value doesn't start with `{` or `[`, prevent deserialization attempt as it's slow
-                    IsJson = false;
-                    return new CallResult(new ServerError("Not a json value"));
+                    IsValid = false;
+                    return new CallResult(new DeserializeError("Not a json value"));
                 }
 
                 _document = JsonDocument.Parse(data);
-                IsJson = true;
-                return new CallResult(null);
+                IsValid = true;
+                return CallResult.SuccessResult;
             }
             catch (Exception ex)
             {
                 // Not a json message
-                IsJson = false;
-                return new CallResult(new ServerError("JsonError: " + ex.Message));
+                IsValid = false;
+                return new CallResult(new DeserializeError($"Json 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
+            // 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

CryptoExchange.Net/Converters/SystemTextJson/SystemTextJsonMessageSerializer.cs

@@ -1,12 +1,27 @@
 using CryptoExchange.Net.Interfaces;
+using System.Diagnostics.CodeAnalysis;
 using System.Text.Json;
 
 namespace CryptoExchange.Net.Converters.SystemTextJson
 {
     /// <inheritdoc />
-    public class SystemTextJsonMessageSerializer : IMessageSerializer
+    public class SystemTextJsonMessageSerializer : IStringMessageSerializer
     {
+        private readonly JsonSerializerOptions _options;
+
+        /// <summary>
+        /// ctor
+        /// </summary>
+        public SystemTextJsonMessageSerializer(JsonSerializerOptions options)
+        {
+            _options = options;
+        }
+
         /// <inheritdoc />
-        public string Serialize(object message) => JsonSerializer.Serialize(message, SerializerOptions.WithConverters);
+#if NET5_0_OR_GREATER
+        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL2026:RequiresUnreferencedCode", Justification = "Everything referenced in the loaded assembly is manually preserved, so it's safe")]
+        [UnconditionalSuppressMessage("AssemblyLoadTrimming", "IL3050:RequiresUnreferencedCode", Justification = "Everything referenced in the loaded assembly is manually preserved, so it's safe")]
+#endif
+        public string Serialize<T>(T message) => JsonSerializer.Serialize(message, _options);
     }
 }

CryptoExchange.Net/CryptoExchange.Net.csproj

@@ -1,16 +1,16 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netstandard2.1</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;netstandard2.1;net8.0;net9.0;net10.0</TargetFrameworks>
   </PropertyGroup>
   <PropertyGroup>
     <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>8.4.1</PackageVersion>
-    <AssemblyVersion>8.4.1</AssemblyVersion>
-    <FileVersion>8.4.1</FileVersion>
+    <PackageVersion>10.0.0</PackageVersion>
+    <AssemblyVersion>10.0.0</AssemblyVersion>
+    <FileVersion>10.0.0</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</PackageTags>
+    <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>
     <RepositoryUrl>https://github.com/JKorf/CryptoExchange.Net.git</RepositoryUrl>
     <PackageProjectUrl>https://github.com/JKorf/CryptoExchange.Net</PackageProjectUrl>
@@ -20,13 +20,16 @@
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <PackageReleaseNotes>https://github.com/JKorf/CryptoExchange.Net?tab=readme-ov-file#release-notes</PackageReleaseNotes>
     <Nullable>enable</Nullable>
-    <LangVersion>12.0</LangVersion>
+    <LangVersion>latest</LangVersion>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
   </PropertyGroup>
   <ItemGroup>
     <None Include="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="'$(Configuration)' == 'Release'">
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
     <IncludeSymbols>true</IncludeSymbols>
@@ -34,12 +37,6 @@
     <EmbedUntrackedSources>true</EmbedUntrackedSources>
     <ContinuousIntegrationBuild>true</ContinuousIntegrationBuild>
   </PropertyGroup>
-  <ItemGroup Label="Deterministic Build" Condition="'$(Configuration)' == 'Release'">
-    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0">
-      <PrivateAssets>all</PrivateAssets>
-      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-    </PackageReference>
-  </ItemGroup>
   <PropertyGroup>
     <DocumentationFile>CryptoExchange.Net.xml</DocumentationFile>
   </PropertyGroup>
@@ -48,17 +45,19 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Microsoft.CodeAnalysis.NetAnalyzers" Version="9.0.0">
+    <PackageReference Include="Microsoft.CodeAnalysis.NetAnalyzers" Version="10.0.101">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Microsoft.Extensions.Http" Version="9.0.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="9.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="9.0.0" />
-    <PackageReference Include="System.Text.Json" Version="9.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Options.ConfigurationExtensions" Version="9.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Logging" Version="10.0.1" />
+    <PackageReference Include="System.Text.Json" Version="10.0.1" />
+    <PackageReference Include="NSec.Cryptography" Version="25.4.0" Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net8.0'))" />
+  </ItemGroup>
+  <ItemGroup Label="Transitive Client Packages">
+    <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="10.0.1" />
+    <PackageReference Include="Microsoft.Extensions.Http" Version="10.0.1" />
+    <PackageReference Include="System.Threading.Channels" Version="10.0.1" />
   </ItemGroup>
 </Project>

CryptoExchange.Net/Exceptions/CeDeserializationException.cs

@@ -0,0 +1,24 @@
+using System;
+
+namespace CryptoExchange.Net.Exceptions
+{
+    /// <summary>
+    /// Exception during deserialization
+    /// </summary>
+    public class CeDeserializationException : Exception
+    {
+        /// <summary>
+        /// ctor
+        /// </summary>
+        public CeDeserializationException(string message) : base(message)
+        {
+        }
+
+        /// <summary>
+        /// ctor
+        /// </summary>
+        public CeDeserializationException(string message, Exception innerException) : base(message, innerException)
+        {
+        }
+    }
+}

CryptoExchange.Net/ExchangeHelpers.cs

@@ -1,7 +1,9 @@
 using CryptoExchange.Net.Objects;
+using CryptoExchange.Net.Objects.Sockets;
 using CryptoExchange.Net.SharedApis;
 using System;
 using System.Collections.Generic;
+using System.Globalization;
 using System.Runtime.CompilerServices;
 using System.Security.Cryptography;
 using System.Threading;
@@ -15,6 +17,7 @@ namespace CryptoExchange.Net
     public static class ExchangeHelpers
     {
         private const string _allowedRandomChars = "ABCDEFGHIJKLMONOPQRSTUVWXYZabcdefghijklmonopqrstuvwxyz0123456789";
+        private const string _allowedRandomHexChars = "0123456789ABCDEF";
 
         private static readonly Dictionary<int, string> _monthSymbols = new Dictionary<int, string>()
         {
@@ -86,8 +89,6 @@ namespace CryptoExchange.Net
                     value -= offset;
                 else value += (step.Value - offset);
             }
-
-            value = RoundDown(value, 8);
                 
             return value.Normalize();
         }
@@ -111,6 +112,34 @@ namespace CryptoExchange.Net
             return RoundToSignificantDigits(value, precision.Value, roundingType);
         }
 
+        /// <summary>
+        /// Apply the provided rules to the value
+        /// </summary>
+        /// <param name="value">Value to be adjusted</param>
+        /// <param name="decimals">Max decimal places</param>
+        /// <param name="valueStep">The value step for increase/decrease value</param>
+        /// <returns></returns>
+        public static decimal ApplyRules(
+            decimal value,
+            int? decimals = null,
+            decimal? valueStep = null)
+        {
+            if (valueStep.HasValue)
+            {
+                var offset = value % valueStep.Value;
+                if (offset != 0)
+                {
+                    if (offset < valueStep.Value / 2)
+                        value -= offset;
+                    else value += (valueStep.Value - offset);
+                }
+            }
+            if (decimals.HasValue)
+                value = Math.Round(value, decimals.Value);
+
+            return value;
+        }
+
         /// <summary>
         /// Round a value to have the provided total number of digits. For example, value 253.12332 with 5 digits would be 253.12 
         /// </summary>
@@ -160,7 +189,7 @@ namespace CryptoExchange.Net
         }
 
         /// <summary>
-        /// Generate a new unique id. The id is staticly stored so it is guarenteed to be unique
+        /// Generate a new unique id. The id is statically stored so it is guaranteed to be unique
         /// </summary>
         /// <returns></returns>
         public static int NextId() => Interlocked.Increment(ref _lastId);
@@ -180,7 +209,7 @@ namespace CryptoExchange.Net
         {
             var randomChars = new char[length];
 
-#if NETSTANDARD2_1_OR_GREATER
+#if NETSTANDARD2_1_OR_GREATER || NET9_0_OR_GREATER
             for (int i = 0; i < length; i++)
                 randomChars[i] = _allowedRandomChars[RandomNumberGenerator.GetInt32(0, _allowedRandomChars.Length)];
 #else
@@ -192,6 +221,44 @@ namespace CryptoExchange.Net
             return new string(randomChars);
         }
 
+        /// <summary>
+        /// Generate a random string of specified length
+        /// </summary>
+        /// <param name="length">Length of the random string</param>
+        /// <returns></returns>
+        public static string RandomHexString(int length)
+        {
+#if NET9_0_OR_GREATER
+            return "0x" + RandomNumberGenerator.GetHexString(length * 2);
+#else
+            var randomChars = new char[length * 2];
+            var random = new Random();
+            for (int i = 0; i < length * 2; i++)
+                randomChars[i] = _allowedRandomHexChars[random.Next(0, _allowedRandomHexChars.Length)];
+            return "0x" + new string(randomChars);
+#endif
+        }
+
+        /// <summary>
+        /// Generate a long value
+        /// </summary>
+        /// <param name="maxLength">Max character length</param>
+        /// <returns></returns>
+        public static long RandomLong(int maxLength)
+        {
+#if NETSTANDARD2_1_OR_GREATER || NET9_0_OR_GREATER
+            var value = RandomNumberGenerator.GetInt32(0, int.MaxValue);
+#else
+            var random = new Random();
+            var value = random.Next(0, int.MaxValue);
+#endif
+            var val = value.ToString();
+            if (val.Length > maxLength)
+                return int.Parse(val.Substring(0, maxLength));
+            else
+                return value;
+        }
+
         /// <summary>
         /// Generate a random string of specified length
         /// </summary>
@@ -225,10 +292,10 @@ namespace CryptoExchange.Net
         /// <param name="request">The request parameters</param>
         /// <param name="ct">Cancellation token</param>
         /// <returns></returns>
-        public static async IAsyncEnumerable<ExchangeWebResult<IEnumerable<T>>> ExecutePages<T, U>(Func<U, INextPageToken?, CancellationToken, Task<ExchangeWebResult<IEnumerable<T>>>> paginatedFunc, U request, [EnumeratorCancellation]CancellationToken ct = default)
+        public static async IAsyncEnumerable<ExchangeWebResult<T[]>> ExecutePages<T, U>(Func<U, INextPageToken?, CancellationToken, Task<ExchangeWebResult<T[]>>> paginatedFunc, U request, [EnumeratorCancellation]CancellationToken ct = default)
         {
             var result = new List<T>();
-            ExchangeWebResult<IEnumerable<T>> batch;
+            ExchangeWebResult<T[]> batch;
             INextPageToken? nextPageToken = null;
             while (true)
             {
@@ -261,6 +328,7 @@ namespace CryptoExchange.Net
             if (price != null)
             {
                 adjustedPrice = AdjustValueStep(0, decimal.MaxValue, symbol.PriceStep, RoundingType.Down, price.Value);
+                adjustedPrice = symbol.PriceSignificantFigures.HasValue ? RoundToSignificantDigits(adjustedPrice.Value, symbol.PriceSignificantFigures.Value, RoundingType.Closest) : adjustedPrice;
                 adjustedPrice = symbol.PriceDecimals.HasValue ? RoundDown(price.Value, symbol.PriceDecimals.Value) : adjustedPrice;
                 if (adjustedPrice != 0 && adjustedPrice * quantity < symbol.MinNotionalValue)
                 {
@@ -273,5 +341,146 @@ namespace CryptoExchange.Net
             adjustedQuantity = symbol.QuantityDecimals.HasValue ? (minNotionalAdjust ? RoundUp(adjustedQuantity, symbol.QuantityDecimals.Value) : RoundDown(adjustedQuantity, symbol.QuantityDecimals.Value)) : adjustedQuantity;
 
         }
+
+        /// <summary>
+        /// Queue updates received from a websocket subscriptions and process them async
+        /// </summary>
+        /// <typeparam name="T">The queued update type</typeparam>
+        /// <param name="subscribeCall">The subscribe call</param>
+        /// <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,
+            Func<DataEvent<T>, Task> asyncHandler,
+            int? maxQueuedItems = null,
+            QueueFullBehavior? fullBehavior = null)
+        {
+            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)
+            {
+                await processor.StopAsync().ConfigureAwait(false);
+                return result;
+            }
+
+            processor.Exception += result.Data._subscription.InvokeExceptionHandler;
+            result.Data.SubscriptionStatusChanged += (upd) =>
+            {
+                if (upd == CryptoExchange.Net.Objects.SubscriptionStatus.Closed)
+                    _ = processor.StopAsync(true);
+            };
+
+            return result;
+        }
+
+        /// <summary>
+        /// Queue updates and process them async
+        /// </summary>
+        /// <typeparam name="T">The queued update type</typeparam>
+        /// <param name="subscribeCall">The subscribe call</param>
+        /// <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>
+        /// <param name="ct">Cancellation token to stop the processing</param>
+        public static async Task ProcessQueuedAsync<T>(
+            Func<Action<T>, Task> subscribeCall,
+            Func<T, Task> asyncHandler,
+            CancellationToken ct,
+            int? maxQueuedItems = null,
+            QueueFullBehavior? fullBehavior = null)
+        {
+            var processor = new ProcessQueue<T>(asyncHandler, maxQueuedItems, fullBehavior);
+            await processor.StartAsync().ConfigureAwait(false);
+            ct.Register(async () =>
+            {
+                await processor.StopAsync().ConfigureAwait(false);
+            });
+
+            await subscribeCall(upd => processor.Write(upd)).ConfigureAwait(false);
+        }
+
+        /// <summary>
+        /// Queue updates received from a websocket subscriptions and process them async
+        /// </summary>
+        /// <typeparam name="TEventType">The type of the queued item</typeparam>
+        /// <typeparam name="TOutputType">The type of the item to pass to the processor</typeparam>
+        /// <param name="subscribeCall">The subscribe call</param>
+        /// <param name="mapper">The mapper function to go from <see>TEventType</see> to <see>TOutputType</see></param>
+        /// <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<TEventType, TOutputType>(
+            Func<ProcessQueue<DataEvent<TEventType>>, Task<CallResult<UpdateSubscription>>> subscribeCall,
+            Func<DataEvent<TEventType>, DataEvent<TOutputType>> mapper,
+            Func<DataEvent<TOutputType>, Task> asyncHandler,
+            int? maxQueuedItems = null,
+            QueueFullBehavior? fullBehavior = null
+            )
+        {
+            var processor = new ProcessQueue<DataEvent<TEventType>>((update) => {
+                return asyncHandler.Invoke(mapper.Invoke(update));
+            }, maxQueuedItems, fullBehavior);
+            await processor.StartAsync().ConfigureAwait(false);
+            var result = await subscribeCall(processor).ConfigureAwait(false);
+            if (!result)
+            {
+                await processor.StopAsync().ConfigureAwait(false);
+                return result;
+            }
+
+            processor.Exception += result.Data._subscription.InvokeExceptionHandler;
+            result.Data.SubscriptionStatusChanged += (upd) =>
+            {
+                if (upd == SubscriptionStatus.Closed)
+                    _ = processor.StopAsync(true);
+            };
+
+            return result;
+        }
+
+        /// <summary>
+        /// Parse a decimal value from a string
+        /// </summary>
+        public static decimal? ParseDecimal(string? value)
+        {
+            // Value is null or empty is the most common case to return null so check before trying to parse
+            if (string.IsNullOrEmpty(value))            
+                return null;            
+
+            // Try parse, only fails for these reasons:
+            // 1. string is null or empty
+            // 2. value is larger or smaller than decimal max/min
+            // 3. unparsable format
+            if (decimal.TryParse(value, NumberStyles.Float, CultureInfo.InvariantCulture, out var decValue))
+                return decValue;
+
+            // Check for values which should be parsed to null
+            if (string.Equals("null", value, StringComparison.OrdinalIgnoreCase)
+                || string.Equals("NaN", value, StringComparison.OrdinalIgnoreCase))
+            {
+                return null;
+            }
+
+            // Infinity value should be parsed to min/max value
+            if (string.Equals("Infinity", value, StringComparison.OrdinalIgnoreCase))
+                return decimal.MaxValue;
+            else if(string.Equals("-Infinity", value, StringComparison.OrdinalIgnoreCase))
+                    return decimal.MinValue;
+
+            if (value!.Length > 27 && decimal.TryParse(value.Substring(0, 27), out var overflowValue))
+            {
+                // Not a valid decimal value and more than 27 chars, from which the first part can be parsed correctly.
+                // assume overflow
+                if (overflowValue < 0)
+                    return decimal.MinValue;
+                else
+                    return decimal.MaxValue;
+            }
+
+            // Unknown decimal format, return null
+            return null;
+        }
     }
 }