limiter

type Limiter interface {
	// Allow reports whether an event with the given token can happen
	// within the configured maximum rate. Returned is the current
	// event count and whether the event can happen.
	Allow(token string) (count int64, ok bool)
}

type Sliding struct {
	// WindowDuration defines the width of the sliding window
	// where events are counted against the maximum.
	WindowDuration time.Duration

	// WindowMaximum is the maximum number of events that can
	// happen within the configured window.
	WindowMaximum int64

	// Redis is the storage backend for per-token rate limit counts.
	Redis redis.Cmdable

	// RedisPrefix will prefix all keys used by the Sliding limiter.
	RedisPrefix string
}

type Tiered []Limiter