async error handling with express

app.ts

import { asyncWrap } from './async-wrap';

const app = express();
asyncWrap();

async-wrap.ts

import { Request, Response, NextFunction } from 'express';
const Layer = require('express/lib/router/layer');

export const asyncWrap = (): void => {
    Layer.prototype.handle_request = async function handle(
        req: Request,
        res: Response,
        next: NextFunction,
    ) {
        const fn = this.handle;

        // not a standard request handler
        if (fn.length > 3) return next();

        try {
            await fn(req, res, next);
        } catch (err) {
            next(err);
        }
    };
};