npm i @chubbyts/chubbyts-http-undici-bridge@^1.0.2

import {
  createServerRequestFactory,
  createUriFactory,
} from '@chubbyts/chubbyts-http/dist/message-factory';
import { createUndiciToServerRequestFactory, createResponseToUndiciFactory } from '@chubbyts/chubbyts-http-undici-bridge/dist/undici-http';

const app = ...;

const undiciToServerRequestFactory = createUndiciToServerRequestFactory(
  createUriFactory(),
  createServerRequestFactory(),
);

const responseToUndiciFactory = createResponseToUndiciFactory();

const res = responseToUndiciFactory(await app(undiciToServerRequestFactory(req)));