import { Request, Response } from 'express';
import { IRateLimitStore, RateLimitBucket, RateLimitBucketConfig, RateLimitHit } from '../interfaces/rate-limit.interface';
export declare const DEFAULT_RATE_LIMIT_BUCKETS: Record<RateLimitBucket, RateLimitBucketConfig>;
export declare class MemoryRateLimitStore implements IRateLimitStore {
    private readonly map;
    private sweepCounter;
    increment(key: string, windowMs: number): RateLimitHit;
    private maybeSweep;
}
export declare class RateLimitService {
    private readonly memoryStore;
    private cfg;
    isEnabled(): boolean;
    private store;
    private bucketConfig;
    enforce(bucket: RateLimitBucket, req: Request, res?: Response): Promise<void>;
    enforceAlways(bucket: RateLimitBucket, req: Request, res?: Response): Promise<void>;
    private enforceBucket;
    private clientIp;
    private identifier;
}
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