Hono + tRPC + subscriptions?

[Blankeos]

I'm trying to figure out how to do Hono +. tRPC subscriptions + Bun.

• I already managed to integrate Bun's Websockets with Hono. It was rather simple: https://hono.dev/docs/helpers/websocket#upgradewebsocket
• Hono and tRPC Websockets handling. (Not yet).

Closest thing I could find with TRPC + Bun's websocket handling is: https://github.com/cah4a/trpc-bun-adapter.
I could pretty much just use the websocket object coming from this library and put it into Bun.serve, but I have some Hono Context (request headers) and (response headers) that I would've wanted to pass onto my subscriptions.

Thanks for the help in advance!

[Blankeos]

Already learned how it worked. Turns out the answer is in the post I made haha.

Websockets, conceptually are just two things:

1. An HTTP GET upgrade to a 101 switching protocol.
2. A websocket handler

So for those two steps:

1. https://hono.dev/docs/helpers/websocket#upgradewebsocket. But actually only used upgradeWebSocket only. Not its `websocket

   const { upgradeWebSocket } = createBunWebSocket()
   
    wsRouter.get(
    '/',
    upgradeWebSocket((c) => {
       // This handler doesn't matter because we're not using the `websocket` from 
      `createBunWebsocket`.
      // We'll be using a custom one below.
      return {};
   })
   );

2. https://github.com/cah4a/trpc-bun-adapter Then used this for the "handling" part.

   const websocket = createBunWSHandler({
      router: appRouter,
      createContext(params) {},
      onError: console.error,
   });