import { type Request } from 'express';
import { type Response } from '../Response';
import { AbstractPolicy } from './AbstractPolicy';
interface Configuration {
    resetInterval: number;
    window: number;
    allow: number;
}
export declare class QuotaPolicy extends AbstractPolicy {
    private readonly buckets;
    private configuration;
    private cleanUpJob;
    constructor();
    preDestroy(): void;
    /**
     * Apply the quota policy. The quota is calculated based on **window** and **allow** configuration
     * parameters and based on the IP address of the remote client.
     *
     * @param {Any} req the client request
     * @returns true if the number of requests on the defined window is less than the allow configuration
     * parameter for the specific client, false otherwise
     *
     * @protected
     * @implements AbstractPolicy#apply(req)
     */
    apply(req: Request): boolean;
    configure(configuration: Configuration): void;
    protected onDeny(res: Response): void;
    /**
     * Remove expired buckets
     *
     * @private
     */
    private removeExpired;
}
export {};