[SOLVED] How do I call a callable v2 Cloud Function in Flutter?

How do I call a callable v2 Cloud Function in Flutter?

I have a Flutter app that uses cloud functions. I upgraded one function to a v2 function and it no longer works. The function cannot be found. The function logs do not show that it is being called. It is in the us-central1 region, as is the rest of the project.

final result = await FirebaseFunctions.instance.httpsCallable('addMessage').call();

Instead of addMessage I have tried the full function URL found in the firebase console, but that does not work either.

Function declaration:

exports.addMessage = onCall(async (request) => {
  //Run function
});

How do I call a v2 cloud function in flutter?

Solution

2024 EDIT: The cloud_functions flutter package now supports calling 2nd gen functions by name, as you always could with 1st gen functions.

Conclusion: as of now you cannot call a v2 cloud function using the flutter cloud_functions package. You must use a regular http request to the full function URL (the cloud_functions package does not support using full URLs). You can use the dart http package to do this, handling the request and response manually.