import express = require("express");
declare namespace RateLimit {
    type IncrCallback = (error: any, hit: number, resetTime: Date) => void;
    interface Store {
        incr(key: string, cb: IncrCallback): void;
        decrement(key: string): void;
        resetAll(): void;
        resetKey(key: string): void;
    }
    interface Options {
        windowMs: number;
        max: number | ((req: express.Request, res: express.Response) => number);
        message: string;
        statusCode: number;
        headers: boolean;
        skipFailedRequests: boolean;
        skipSuccessfulRequests: boolean;
        keyGenerator: (req: express.Request, res: express.Response) => string;
        skip: (req: express.Request, res: express.Response) => boolean;
        handler: express.RequestHandler;
        onLimitReached: (req: express.Request, res: express.Response, optionsUsed: Options) => void;
        store: Store;
    }
    interface AugmentedRequest extends express.Request {
        rateLimit: {
            limit: number;
            current: number;
            remaining: number;
            resetTime: Date;
        };
    }
}
declare type RateLimit = express.RequestHandler & {
    resetKey: RateLimit.Store["resetKey"];
    resetIp: RateLimit.Store["resetKey"];
};
declare function RateLimit(incomingOptions: Partial<RateLimit.Options>): RateLimit;
export = RateLimit;