/**
 * Creates a new rate limiter.
 *
 * @typeparam TKey - The type of the key.
 * @param windowSizeMs - The length of the time window in milliseconds.
 *
 * @returns The rate limiter.
 **/
export declare function newRateLimiter(windowSizeMs: number): {
    clearStale: (all?: boolean) => void;
    isAllowed: (key: string) => boolean;
    cacheSize: () => number;
};
//# sourceMappingURL=rate-limiter.d.ts.map