"NOT FOUND" error when using Firebase Function Emulator with React Native ios app

Hi,

I have a React Native ios app that calls a Firebase function. When I use production environment everything works fine. However when I use the Firebase local emulator I get “NOT FOUND” error. I do use useFunctionsEmulator with the emulator endpoint http://localhost:5001/ but it doesn’t help.

What is more odd when I try to use the whole function address instead of the emulator endpoint: useFunctionsEmulator("http://localhost:5001/react-native-showcase-381f9/us-central1/helloWorld"); Everything works fine.

[REQUIRED] Environment info

firebase-tools: 8.4.1

Platform: macOS

React Native: 0.62.2

Running an app inside iPhone emulator

[REQUIRED] Steps to reproduce

exports.helloWorld = functions.https.onCall(() => {
  return ['lol', 'internet'];
});

> firebase emulators:start
...
✔  functions[helloWorld]: http function initialized (http://localhost:5001/react-native-showcase-381f9/us-central1/helloWorld).

...
functions().useFunctionsEmulator('http://localhost:5001/');
functions()
        .httpsCallable('helloWorld')()
        .then(response => {
          console.log(response);
        });
...

[REQUIRED] Expected behavior

Log some data into the console.

[REQUIRED] Actual behavior

Getting “NOT FOUND” error.

[ciocan]

Same issue here. React Native has nothing to do with it. When I get the emulator functions address I get “Not found”

Firestore emulator address responds with “ok”

Is this normal?

[samtstern]

@aleksejkozin there’s really nothing here to suggest that this is an issue with the Functions Emulator or the Firebase CLI. I would suggest filing this issue on the React Native SDK repository.

Also in general this is not enough information to debug. You should at least catch()the error and show the output. It may give you some clues as to what is going wrong.