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https://github.com/JKorf/CryptoExchange.Net
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74 lines
4.0 KiB
Markdown
74 lines
4.0 KiB
Markdown
---
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title: Rate limiting
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nav_order: 9
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---
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## Rate limiting
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The library has build in rate limiting. These rate limits can be configured per client. Some client implementations where the exchange has clear rate limits will also have a default rate limiter already set up.
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Rate limiting is configured in the client options, and can be set on a specific client or for all clients by either providing it in the constructor for a client, or by using the `SetDefaultOptions` on a client.
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What to do when a limit is reached can be configured with the `RateLimitingBehaviour` client options, which has 2 possible options. Setting it to `Fail` will cause a request to fail without sending it. Setting it to `Wait` will cause the request to wait until the request can be send in accordance to the rate limiter.
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A rate limiter can be configured in the options like so:
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```csharp
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new ClientOptions
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{
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RateLimitingBehaviour = RateLimitingBehaviour.Wait,
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RateLimiters = new List<IRateLimiter>
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{
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new RateLimiter()
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.AddTotalRateLimit(50, TimeSpan.FromSeconds(10))
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}
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}
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```
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This will add a rate limiter for 50 requests per 10 seconds.
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A rate limiter can have multiple limits:
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```csharp
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new RateLimiter()
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.AddTotalRateLimit(50, TimeSpan.FromSeconds(10))
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.AddEndpointLimit("/api/order", 10, TimeSpan.FromSeconds(2))
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```
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This adds another limit of 10 requests per 2 seconds in addition to the 50 requests per 10 seconds limit.
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These are the available rate limit configurations:
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### AddTotalRateLimit
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|Parameter|Description|
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|---------|-----------|
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|limit|The request weight limit per time period. Note that requests can have a weight specified. Default requests will have a weight of 1|
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|perTimePeriod|The time period over which the limit is enforced|
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A rate limit for the total amount of requests for all requests send from the client.
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### AddEndpointLimit
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|Parameter|Description|
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|---------|-----------|
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|endpoint|The endpoint this limit is for|
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|limit|The request weight limit per time period. Note that requests can have a weight specified. Default requests will have a weight of 1|
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|perTimePeriod|The time period over which the limit is enforced|
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|method|The HTTP method this limit is for. Defaults to all methods|
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|excludeFromOtherRateLimits|When set to true requests to this endpoint won't be counted for other configured rate limits|
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A rate limit for all requests send to a specific endpoint. Requests that do not fully match the endpoint will not be counted to this limit.
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### AddPartialEndpointLimit
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|Parameter|Description|
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|---------|-----------|
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|endpoint|The partial endpoint this limit is for. Partial means that a request will match this limiter when a part of the request URI path matches this endpoint|
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|limit|The request weight limit per time period. Note that requests can have a weight specified. Default requests will have a weight of 1|
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|perTimePeriod|The time period over which the limit is enforced|
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|method|The HTTP method this limit is for. Defaults to all methods|
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|countPerEndpoint|Whether all requests matching the endpoint pattern should be combined for this limit or each endpoint has its own limit|
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|ignoreOtherRateLimits|When set to true requests to this endpoint won't be counted for other configured rate limits|
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A rate limit for a partial endpoint. Requests will be counted towards this limit if the request path contains the endpoint. For example request `/api/v2/test` will match when the partial endpoint limit is set for `/api/v2`.
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### AddApiKeyLimit
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|Parameter|Description|
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|---------|-----------|
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|limit|The request weight limit per time period. Note that requests can have a weight specified. Default requests will have a weight of 1|
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|perTimePeriod|The time period over which the limit is enforced|
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|onlyForSignedRequests|Whether this rate limit should only be counter for signed/authenticated requests|
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|excludeFromTotalRateLimit|Whether requests counted for this rate limited should not be counted towards the total rate limit|
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A rate limit for an API key. Requests with the same API key will be grouped and limited. |