Koa / Express Shared Typescript Middleware

middleware.ts

import Express, { Application, Request, Response, NextFunction } from 'express';
import Koa, { Context, Next } from 'koa';

const middleware = async (req: Request | Context['request'], res: Response | Context['response'], next: NextFunction) => {
  console.log('Time:', Date.now());
  await next();
}

interface Options {}

const Middleware = (app: Application | Koa, options:Options) => {
  if (app instanceof Koa) {
    app.use(async (ctx: Context, next: Next) => {
      await middleware(ctx.request, ctx.response, next);
    });
  } else  {
    app.use(async (req: Request, res: Response, next: NextFunction) => {
      await middleware(req, res, next);
    });
  }
};

export default Middleware;