/// <reference types="qs" />
/**
 * Express middleware to handle {@link module:error/ErrorTypes.OperationalError} in production when not catched by express-graphql.
 * @module error/ErrorHandler
 */
import { NextFunction, Request, Response } from 'express';
declare const _default: (err: Error, req: Request<import("express-serve-static-core").ParamsDictionary, any, any, import("qs").ParsedQs>, res: Response<any>, next: NextFunction) => void;
/**
 * Express middleware rendering {@link module:error/ErrorTypes.OperationalError} error message to client, avoiding server crash for those king of error.
 * @param  {Error} err
 * @param  {Request} req
 * @param  {Response} res
 * @param  {NextFunction} next
 * @renders JSON object containing the error to display.
 */
export default _default;