[fix] Has callback() changed return type? Now error from eslint about koa HOT 5 OPEN

This change (the one referenced in your issue on the @types repo) was incorrect. Returning a function that returns a promise isn't the same as returning a Promise. It looks like the original change mentions that issue, but the current version of the types on npm is still incorrect.

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In the meantime added issue to DefinitelyTyped @types/koa module DefinitelyTyped/DefinitelyTyped#64923

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@crystalfp did you try something like this

import http2 from "node:http2";
import fs from "node:fs";

import Koa from "koa";

const options = {
  key: fs.readFileSync("./cert/localhost-privkey.pem"),
  cert: fs.readFileSync("./cert/localhost-cert.pem"),
};
const port = 3322;

const runApp = () => {
  console.log("Running");
};
const handleServerErrors = (error) => {
  console.log("Error", error);
};

const app = new Koa();
const startServer = async () => {
  const server = http2.createSecureServer(options, app.callback());
  server.listen(port, () => runApp()).once("error", handleServerErrors);
};

startServer();

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This is exactly my code (also in my first question BTW). The problem is the typing of app.callback() not the code.

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@crystalfp This should be fixed on the @types/koa side.

I am not sure but maybe wrapping the callback method on another anonymous function like () => { app.callback() } be work.

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