error-handler.middleware.ts

import { Request, Response, NextFunction } from "express";
import { CustomError } from "../errors/custom-error";

export const errorHandler =  (
  err: Error, 
  req: Request, 
  res: Response, 
  next: NextFunction
) => {

  if (err instanceof CustomError) {
    return res.status(err.statusCode).send({ errors: err.serializeError() });
  }

  res.status(400).send({
    errors: [{message: 'something went wring'}]
  })

}