# Haskell: ratelimiter
A simple in-memory rate-limiter library.
## Usage
``` haskell
import Control.RateLimiter
import qualified Data.Vector as V
main :: IO
main =
-- one rate limiter can have multiple rules
do limiter <-
newRateLimiter $ V.fromList
[ RateLimitConfig (RollingWindow 60) 200 -- 200 per minute
, RateLimitConfig (RollingWindow 3600) 400 -- 400 per hour
]
let myRateLimitedFunction =
do isLimited <- isRateLimited () limiter
if isLimitd then pure Nothing else Just <$> someExpensiveWork
-- ... use myRateLimitedFunction
```