nim-chat-sdk/ratelimit/store/store.nim

import std/[times, deques, options]
import chronos

type
  BucketState* = object
    budget*: int
    budgetCap*: int
    lastTimeFull*: Moment

  RateLimitStore* =
    concept s
        s.saveBucketState(BucketState) is Future[bool]
        s.loadBucketState() is Future[Option[BucketState]]