import { NextFunction, Request, Response } from 'express';
/**
 * A Middleware use to map Error types
 * @param err An Error instance
 * @param req Incoming HTTP Request object
 * @param res HTTP Response Object
 * @returns An HTTP Response Object with the corresponding HTTP code and message
 */
export declare const errorHandler: (err: Error, req: Request, res: Response, _next: NextFunction) => unknown;