Implement orpc with nitro (better-t-stack)

trpc-orpc.ts

- Create a file [...orpc].ts with the following: 

const handler = new RPCHandler(appRouter);

export default defineEventHandler(
  async (event: H3Event) => {
    const context = await createContext(event);
    const webRequest = toWebRequest(event);
    const { matched, response } =
      await handler.handle(webRequest, {
        prefix: "/api/orpc",
        context,
      });

    if (matched) {
      return response;
    }
  }
);

Also add a middleware file to handle CORS:

const allowedOrigin = "http://localhost:3000";

export default defineEventHandler(
  (event: H3Event) => {
    setHeader(
      event,
      "Access-Control-Allow-Origin",
      allowedOrigin
    );
    setHeader(
      event,
      "Access-Control-Allow-Methods",
      "GET, POST, PUT, DELETE, OPTIONS"
    );
    setHeader(
      event,
      "Access-Control-Allow-Headers",
      "Content-Type, Authorization, X-Requested-With"
    );
    setHeader(
      event,
      "Access-Control-Allow-Credentials",
      "true"
    );

    // Handle preflight OPTIONS request
    if (event.method === "OPTIONS") {
      event.node.res.statusCode = 204;
      event.node.res.end();
    }
  }
);


For the rest take whats already with hono, so the approuter, createContext function, orpc.ts file and you are good to go