/**
 * In-memory rate limiter backed by `MemoryStorage`. Implements the
 * `consume()` / `penalty()` / `reward()` / `block()` / `get()` /
 * `delete()` surface from the upstream limiter library.
 *
 * Ported to TypeScript from RateLimiterMemory. See
 * `THIRDPARTY-LICENSES.md` for attribution.
 */
import { AbstractLimiter } from './abstract';
import type { LimiterOptions, LimiterConsumeOptions, IRateLimiterRes } from './types';
export declare class MemoryLimiter extends AbstractLimiter {
    private _storage;
    constructor(opts: LimiterOptions);
    consume(key: string, pointsToConsume?: number, options?: LimiterConsumeOptions): Promise<IRateLimiterRes>;
    penalty(key: string, points?: number, options?: LimiterConsumeOptions): Promise<IRateLimiterRes>;
    reward(key: string, points?: number, options?: LimiterConsumeOptions): Promise<IRateLimiterRes>;
    block(key: string, secDuration: number): Promise<IRateLimiterRes>;
    get(key: string): Promise<IRateLimiterRes | null>;
    delete(key: string): Promise<boolean>;
    /** Test/teardown helper. Drops every key and clears timers. */
    dispose(): void;
}
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