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Code Issues Releases Wiki Activity

Shared API's V2 (#289)

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Added V2 Shared API's infrastructure
Added request coalescing
Added rate limiting admission logic
Fixed some rate limiting issues
This commit is contained in:
Jan Korf
2026-09-23 09:15:39 +02:00
committed by GitHub
parent cecfbcba48
commit ae7504c26c
482 changed files with 12870 additions and 2150 deletions
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CryptoExchange.Net/RateLimiting/Guards/RateLimitGuard.cs
+16 -8
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@@ -36,6 +36,7 @@ namespace CryptoExchange.Net.RateLimiting.Guards
private readonly Dictionary<string, IWindowTracker> _trackers;
private readonly RateLimitWindowType _windowType;
private readonly double? _decayRate;
private readonly TimeSpan _safetyMargin;
private readonly int? _connectionWeight;
private readonly Func<RequestDefinition, string?, string> _keySelector;
private readonly SemaphoreSlim? _sharedGuardSemaphore;
@@ -54,6 +55,10 @@ namespace CryptoExchange.Net.RateLimiting.Guards
/// The time period for the limit
/// </summary>
public TimeSpan TimeSpan { get; }
/// <summary>
/// Additional time to wait after a rate limit window expires to account for latency and timing differences
/// </summary>
public TimeSpan SafetyMargin => _safetyMargin;
/// <summary>
/// Whether this guard is shared between multiple gates
@@ -68,11 +73,12 @@ namespace CryptoExchange.Net.RateLimiting.Guards
/// <param name="limit">Limit per period</param>
/// <param name="timeSpan">Timespan for the period</param>
/// <param name="windowType">Type of rate limit window</param>
/// <param name="safetyMargin">Additional time to wait after a window expires, or null to use the default margin</param>
/// <param name="decayPerTimeSpan">The decay per timespan if windowType is DecayWindowTracker</param>
/// <param name="connectionWeight">The weight of a new connection</param>
/// <param name="shared">Whether this guard is shared between multiple gates</param>
public RateLimitGuard(Func<RequestDefinition, string?, string> keySelector, IGuardFilter filter, int limit, TimeSpan timeSpan, RateLimitWindowType windowType, double? decayPerTimeSpan = null, int? connectionWeight = null, bool shared = false)
: this(keySelector, new[] { filter }, limit, timeSpan, windowType, decayPerTimeSpan, connectionWeight, shared)
public RateLimitGuard(Func<RequestDefinition, string?, string> keySelector, IGuardFilter filter, int limit, TimeSpan timeSpan, RateLimitWindowType windowType, double? decayPerTimeSpan = null, int? connectionWeight = null, bool shared = false, TimeSpan? safetyMargin = null)
: this(keySelector, new[] { filter }, limit, timeSpan, windowType, decayPerTimeSpan, connectionWeight, shared, safetyMargin)
{
}
@@ -84,10 +90,11 @@ namespace CryptoExchange.Net.RateLimiting.Guards
/// <param name="limit">Limit per period</param>
/// <param name="timeSpan">Timespan for the period</param>
/// <param name="windowType">Type of rate limit window</param>
/// <param name="safetyMargin">Additional time to wait after a window expires, or null to use the default margin</param>
/// <param name="decayPerTimeSpan">The decay per timespan if windowType is DecayWindowTracker</param>
/// <param name="connectionWeight">The weight of a new connection</param>
/// <param name="shared">Whether this guard is shared between multiple gates</param>
public RateLimitGuard(Func<RequestDefinition, string?, string> keySelector, IEnumerable<IGuardFilter> filters, int limit, TimeSpan timeSpan, RateLimitWindowType windowType, double? decayPerTimeSpan = null, int? connectionWeight = null, bool shared = false)
public RateLimitGuard(Func<RequestDefinition, string?, string> keySelector, IEnumerable<IGuardFilter> filters, int limit, TimeSpan timeSpan, RateLimitWindowType windowType, double? decayPerTimeSpan = null, int? connectionWeight = null, bool shared = false, TimeSpan? safetyMargin = null)
{
_filters = filters;
_trackers = new Dictionary<string, IWindowTracker>();
@@ -97,6 +104,7 @@ namespace CryptoExchange.Net.RateLimiting.Guards
SharedGuard = shared;
_keySelector = keySelector;
_decayRate = decayPerTimeSpan;
_safetyMargin = safetyMargin ?? WindowTrackerHelpers.GetDefaultSafetyMargin(timeSpan); ;
_connectionWeight = connectionWeight;
if (SharedGuard)
@@ -104,7 +112,7 @@ namespace CryptoExchange.Net.RateLimiting.Guards
}
/// <inheritdoc />
public LimitCheck Check(RateLimitItemType type, RequestDefinition definition, string? apiKey, int requestWeight, string? keySuffix)
public LimitCheck Check(RateLimitItemType type, RequestDefinition definition, string? apiKey, int requestWeight, string? keySuffix, double allowedRateRatio)
{
foreach (var filter in _filters)
{
@@ -127,7 +135,7 @@ namespace CryptoExchange.Net.RateLimiting.Guards
_trackers.Add(key, tracker);
}
var delay = tracker.GetWaitTime(requestWeight);
var delay = tracker.GetWaitTime(requestWeight, allowedRateRatio);
if (delay == default)
return LimitCheck.NotNeeded(Limit, TimeSpan, tracker.Current);
@@ -205,9 +213,9 @@ namespace CryptoExchange.Net.RateLimiting.Guards
/// <returns></returns>
protected IWindowTracker CreateTracker()
{
return _windowType == RateLimitWindowType.Sliding ? new SlidingWindowTracker(Limit, TimeSpan)
: _windowType == RateLimitWindowType.Fixed ? new FixedWindowTracker(Limit, TimeSpan)
: _windowType == RateLimitWindowType.FixedAfterFirst ? new FixedAfterStartWindowTracker(Limit, TimeSpan) :
return _windowType == RateLimitWindowType.Sliding ? new SlidingWindowTracker(Limit, TimeSpan, _safetyMargin)
: _windowType == RateLimitWindowType.Fixed ? new FixedWindowTracker(Limit, TimeSpan, _safetyMargin)
: _windowType == RateLimitWindowType.FixedAfterFirst ? new FixedAfterStartWindowTracker(Limit, TimeSpan, _safetyMargin) :
new DecayWindowTracker(Limit, TimeSpan, _decayRate ?? throw new InvalidOperationException("Decay rate not provided"));
}
}