firebase_auth onAuthStateChanged not updated on linkWithCredential

[erf]

Describe the bug
I'm linking an Anonymous firebaseUser to a Phone provider using firebaseUser.linkWithCredential but onAuthStateChanged is not triggered, even if i call firebaseUser.reload().

To Reproduce
Steps to reproduce the behavior:

1. Sign in with an anonymous user
2. Link to a phone provider using linkWithCredential

Expected behavior
I would expect Firebase.instance.onAuthStateChanged to be triggered with a new event, especially after calling firebaseUser.reload.

Additional context

Flutter doctor
Run flutter doctor and paste the output below:

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, v1.17.1, on Mac OS X 10.15.4 19E287, locale en-GB)

[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
[✓] Xcode - develop for iOS and macOS (Xcode 11.5)
[✓] Android Studio (version 4.0)
[✓] VS Code (version 1.40.0)
[✓] Connected device (1 available)

• No issues found!

[TahaTesser]

Hi @erf
Does this look similar to #2344?

[erf]

@TahaTesser I am able to link an anonymous user to a phone provider, but the FirebaseAuth.instance.onAuthStateChanged was not called.

..but after some more testing, i think the problem is related to CombineLatestStream of rxdart, in that it does not push a new event when onAuthStateChanged does.

I'll close this for now, but if you have any experience with this scenario, please help.

Thank you.

[erf]

@TahaTesser Actually it does seem somewhat random, like he mentions in #2434

I removed the use of CombineLatestStream and used a regular StreamBuilder. I then call firebaseUser.unlinkFromProvider on all providers in providerData and call reload.

I don't get a new onAuthStateChanged event.

[erf]

I think this is related to #717

[TahaTesser]

Hi @erf
Can you please provide Your flutter run --verbose and a minimal complete reproducible code sample.
Thank you

[erf]

@TahaTesser that could make quite the complex example

Could you tell me if the following:

firebaseUser.linkWithCredential
firebaseUser.reload().

is supposed to trigger an event in FirebaseAuth.instance.onAuthStateChanged with a FirebaseUser with updated providerData ?

If not, then i guess everything is fine. Except i think this is what should happen.

I started using firebase_user_stream which solved my issue.

[RWOverdijk]

I know this repo is not for the firebase JS web sdk, but I have the same issue there. I'm signed in as an anonymous user and upon linking with a credential it does not trigger the onAuthStateChanged.

Normally I wouldn't comment on an unrelated repo but I think these issues might be related somehow. .reload() also doesn't do anything for me so that also seems the same.

[Ehesp]

Reload doesn't retrigger anything, you should be able to call reload and access the currentUser after it.

[RWOverdijk]

I get that, I was talking about triggering the auth state change.

[bulwinkel]

For other who end up here, based on comments in this issue #717 there will be userChanges stream available in a future release of firebase_auth as part of the work being done in #2582 but it is unclear in which release it will become available.

[schankam]

I'm having the same problem after linking an anonymous user with an other provider, the onAuthStateChanged is not triggered. I am using a StreamProvider with FirebaseUser, and was expecting it to be triggered so my UI is refreshed accordingly (currently using a Visibility Widget to display extra option with the firebaseUser.isAnonymous property). If this is not working correctly, how are we supposed to rely on that boolean ?

[erf]

I believe this is solved in firebase_auth 0.18.0. You can now listen to the userChanges stream for these events.