import { Request, Response, NextFunction } from "express";
type BaseConfig = {
    intervalInSec: number;
    customMessage?: string;
    customHeaders?: Record<string, any>;
};
type TokenBucketAlgoConfig = BaseConfig & {
    algorithm: "token_bucket";
    capacity: number;
};
type SlidingWindowAlgoConfig = BaseConfig & {
    algorithm?: "sliding_window_counter";
    allowedNoOfRequests: number;
};
type IpBlockConfig = BaseConfig & {
    blocks?: "ip_addr";
    tokenProvider?: never;
};
type AuthBlockConfig = BaseConfig & {
    blocks: "auth_token";
    tokenProvider: (req: Request, res: Response) => string;
};
export type LimitNginConfig = BaseConfig & (TokenBucketAlgoConfig | SlidingWindowAlgoConfig) & (IpBlockConfig | AuthBlockConfig);
export declare class LimitNgin {
    #private;
    config: LimitNginConfig;
    constructor(config?: LimitNginConfig);
    listen(req: Request, res: Response, next: NextFunction): Response<any, Record<string, any>> | undefined;
}
export {};
//# sourceMappingURL=limitNgin.d.ts.map