import { ErrorRequestHandler, NextFunction, Request, Response } from 'express';
/**
 * An error class which handles HTTP status codes.
 */
export declare class HTTPError<T extends {
    message: string;
} = {
    message: string;
}> extends Error {
    /**
     * return an instance of HTTPError which can be handled to provide correct
     * status code along with error message. Check the default function for more
     * details
     */
    readonly status: number;
    readonly message: string;
    readonly obj: T;
    constructor(status: number, obj: T);
}
/**
 * convert a promise based function into an express middleware.
 * the returned function is not exactly a middleware because it does not handle
 * any next function.
 */
declare const _default: <T extends Request>(promiseFunction: (req: T, res: Response) => Promise<unknown> | unknown) => (req: Request, res: Response, next: NextFunction) => void;
export default _default;
export declare const errorHandler: ErrorRequestHandler;