I’m trying to get started with Cloud Functions for Firebase and trying to implement a simple onCall handler. I have copied the default code from the documentation for v2 functions and reduced it to get the simplest possible code to rule out other issues. For reference here is a minimal index.js:

const {onCall, HttpsError} = require("firebase-functions/v2/https");

exports.helloHttp = onCall((request) => {
  return {
    'data': request.data.name
  }
});

and the associated package.json:

{
  "type":"module",
  "dependencies": {
    "firebase-functions": "^5.0.0"
  }
}

When I try to run the code using the “Run Test” button in Google Cloud Functions Console I get the following error:

[9:08:51 PM] - TypeError: Cannot read properties of undefined (reading 'on')
    at /workspace/node_modules/firebase-functions/lib/common/providers/https.js:392:17
    at new Promise (<anonymous>)
    at /workspace/node_modules/firebase-functions/lib/common/providers/https.js:391:16
    at /workspace/node_modules/firebase-functions/lib/v2/trace.js:16:28
    at /layers/google.nodejs.functions-framework/functions-framework/node_modules/@google-cloud/functions-framework/build/src/function_wrappers.js:113:25
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)

I’m using node.js runtime version 20 and unless I’m missing something obvious, it feels like a bug in the imported onCall function.

Does anyone have an idea of how to get onCall to work in Cloud Functions? I could switch to using standard HTTP requests, but I want to use the authentication stuff associated with the Callables and it seems like this should be easy(?).