tRPC breaks Denoflare

[wrnrlr]

I been trying to get Denoflare to work with Deno 2.0 and tRPC.

If I run the most basic tRPC example Denoflare will complain about the Deno namespace:

import { initTRPC } from '@trpc/server'
import { fetchRequestHandler } from '@trpc/server/adapters/fetch'

const t = initTRPC.create()
const router = t.router
const publicProcedure = t.procedure
const appRouter = router({
  hello: publicProcedure.query(()=>'hi')
})

export default {
  async fetch(request: Request): Promise<Response> {
    return fetchRequestHandler({
      endpoint: '/trpc',
      req: request,
      router: appRouter,
      createContext: ()=>({})
    })
  }
}

Compiling https://raw.githubusercontent.com/skymethod/denoflare/f414afa279f0ab095eb40505f51afa913adc2d7e/cli-webworker/worker.ts into worker contents...
{ out: "", err: "", success: true }
Bundled https://raw.githubusercontent.com/skymethod/denoflare/f414afa279f0ab095eb40505f51afa913adc2d7e/cli-webworker/worker.ts (esbuild) in 148ms
runScript: bug.ts
{ out: "", err: "", success: true }
Bundled bug.ts (esbuild) in 128ms
worker: start
Error running script ReferenceError: Deno is not defined
    at denoEnvGet (ext:deno_node/_process/process.ts:30:34)
    at Object.get (ext:deno_node/_process/process.ts:45:22)
    at initTRPCInner (blob:null/93ce3d01-69be-4061-984b-8d714de23c75:668:55)
    at _TRPCBuilder.create (blob:null/93ce3d01-69be-4061-984b-8d714de23c75:658:29)
    at blob:null/93ce3d01-69be-4061-984b-8d714de23c75:1194:18

Simple repo to reproduce bug with full --verbose stacktrace: https://github.com/wrnrlr/denoflare-trpc-bug

[johnspurlock-skymethod]

In general, Denoflare is meant to create scripts that run on Cloudflare Workers. The Workers runtime does not have any proprietary Deno functions implemented, so you can't use any Deno.* functionality.

Also, Workers manages the entire request lifecycle, so the pattern there is definitely not to start your own server. You might be able to use other pieces from the TRPC lib that don't rely on serving to implement the worker call.

[wrnrlr]

The denoEnvGet originates somewhere from a shim that Deno provides, but I haven't been able to figure out when or who is doing this. You are probably right though, in that using the tRPC server in this way is not a good fit for a cloud worker. I'll develop a more lightweight solution and research some other way to make the client and server typesafe. Thank for your help, at least now I know not to spent more time on this.