import type { RateLimitOptions } from '../../shared/types/options';
export declare class RateLimiter {
    private readonly enabled;
    private readonly maxRequests;
    private readonly windowMs;
    private readonly requests;
    private cleanupInterval?;
    constructor(options?: RateLimitOptions);
    checkLimit(key?: string): Promise<void>;
    getUsage(key?: string): {
        current: number;
        limit: number;
        remaining: number;
        resetAt: number;
    };
    reset(key?: string): void;
    resetAll(): void;
    private cleanup;
    destroy(): void;
    isEnabled(): boolean;
    getConfig(): {
        maxRequests: number;
        windowMs: number;
    };
    getStats(): {
        enabled: boolean;
        maxRequests: number;
        windowMs: number;
        activeKeys: number;
        totalRequests: number;
    };
}
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