import type { RateLimitStorage, RateLimitData, RateLimitTransaction } from '../types';
export declare class MemoryStorage implements RateLimitStorage {
    private store;
    private cleanupInterval;
    constructor(cleanupIntervalMs?: number);
    private startCleanup;
    private cleanup;
    destroy(): void;
    get(key: string): Promise<RateLimitData | null>;
    set(key: string, data: RateLimitData, ttl?: number): Promise<boolean>;
    increment(key: string, amount?: number): Promise<number>;
    delete(key: string): Promise<boolean>;
    exists(key: string): Promise<boolean>;
    expire(key: string, ttl: number): Promise<boolean>;
    multi(): RateLimitTransaction;
}