type Env = { SECRET1?: string; SECRET2?: string; }; export default { fetch(request: Request, env: Env) { const url = new URL(request.url); if (url.pathname === "/secret") { const { SECRET1 = "", SECRET2 = "" } = env; return new Response(`${SECRET1} ${SECRET2}`); } // @ts-expect-error return Response.json({ ...request, headers: Object.fromEntries(request.headers), }); }, };