Resolved Firebase initializes, but no token received [Firebase SDK 8.0.0]

EDIT: I solved it by downgrading Unity Firebase SDK 8.0.0 back to 7.2.0

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I have a problem with Firebase Cloud Messaging (FCM). Everything used to work fine, but since recently my app doesn't receive tokens anymore.

Initialization of the APIs seems to go fine:



... and the initialization code from the FCM tutorial also seems to be executed normally:





... but the OnTokenReceived routine (see code above) never gets triggered anymore. I can still send messages to my devices that I managed to register before this problem appeared, though (i'm saving the tokens in a database).

So, in summary: everything seems fine, except that my app stopped receiving FCM tokens

I tried a whole bunch of things (updating/reinstalling Firebase SDKs, reimport all assets, android resolver, etc), but no luck so far. I think that the problems started after updating the Google Mobile Ads SDK, but that may be a coincidence.

I'd be happy to hear any suggestions about:
1) what could be the problem
2) how i can further debug this (e.g., is there any way to see in Firebase console when/why it refuses to send a token to an app?)

 

PS. One thing that i did notice is that Firebase Cloud Messaging API gets initialized several times (or at least there are multiple messages about it). Can that be a problem and, if so, how can i avoid this? (This initialization is something that happens automatically - i don't do this anywhere in the code AFAIK)



PPS. I also see that I somehow ended up with two installations of some of the Firebase SDKs (7.2.0 and 8.0.0) - can that be a problem (and explain multiple initializations)?

 

I have the same issue.
Callback method not work after updated the Firebase SDK from 7.2 to 8.1.
It works well with iOS at 8.1, but Android not.

 

Try FirebaseMessaging.GetTokenAsync();

Code (CSharp):

1. public void InitializeFCM()
2. {
3. ....
4.    GetTokenAsync();
5. }
6.  
7. private async void GetTokenAsync()
8. {
9.     var task = FirebaseMessaging.GetTokenAsync();
10.  
11.     await task;
12.  
13.     if (task.IsCompleted)
14.     {
15.        Debug.Log("GET TOKEN ASYNC "+ task.Result);
16.     }
17. }
18.  

or

Code (CSharp):

1. public void InitializeFCM()
2. {
3. ....
4.    StartCoroutine(GetTokenAsync());
5. }
6.  
7. private IEnumerator void GetTokenAsync()
8. {
9.     var task = FirebaseMessaging.GetTokenAsync();
10.  
11.     while(!task.IsCompleted)
12.          yield return new WaitForEndOfFrame();
13.  
14.     Debug.Log("GET TOKEN ASYNC "+ task.Result);
15. }

 

Thanks man, it worked!

 

Hi,
Firebase Cloud Messaging API Initialized is printing but can any one say how to get token.
Thanks in advance.

 

No it was not working, please see the below code what i have used....

public void Start() {
Firebase.Messaging.FirebaseMessaging.TokenReceived += OnTokenReceived;
Firebase.Messaging.FirebaseMessaging.MessageReceived += OnMessageReceived;
}

public void OnTokenReceived(object sender, Firebase.Messaging.TokenReceivedEventArgs token) {
UnityEngine.Debug.Log("Received Registration Token: " + token.Token);
}

public void OnMessageReceived(object sender, Firebase.Messaging.MessageReceivedEventArgs e) {
UnityEngine.Debug.Log("Received a new message from: " + e.Message.From);
}

 

I created one dummy project only with one button and script mentioned below at that time token generated...

 

1. public void InitializeFCM()
2. {
3. ....
4. StartCoroutine(GetTokenAsync());
5. }
6. 
   
7. private IEnumerator void GetTokenAsync()
8. {
9. var task = FirebaseMessaging.GetTokenAsync();
10. 
    
11. while(!task.IsCompleted)
12. yield return new WaitForEndOfFrame();
13. 
    
14. Debug.Log("GET TOKEN ASYNC "+ task.Result);
15. }

I used the above script and the error was showing to me was mentioned below please check the pic

 

When I import the google-services.json file to my project assets i error was showing in console like
TypeLoadException: Could not resolve type with token 01000074 (from typeref, class/assembly Google.EditorInitializer, Google.VersionHandlerImpl, Version=1.2.0.0, Culture=neutral, PublicKeyToken=null)
Rethrow as TypeInitializationException: The type initializer for 'Firebase.Editor.XcodeProjectPatcher' threw an exception.

 

The issue was solved and the token was generating now

Error is because i have old External Dependency Manager.
Updated the External Dependency Manager then downloaded the google-services.json file again and imported the unity and finally got token.

Update External Dependency Manager package link : https://forum.unity.com/threads/firebase-stopped-working-after-unity-2020-upgrade.986790/
check the conversation and will get the download link directly.

 

Is it normal to get a StubToken in the editor ?

 

I was wondering. Should `Firebase.Messaging.FirebaseMessaging.TokenReceived += OnTokenReceived;` also work in the unity editor or only on mobile builds? And is there a way to easily test FCM in the Unity Editor without having to build the project for mobile?

 

Using this code to try and fetch the token but firebase throws this exception:

FirebaseException: The operation couldn’t be completed. No APNS token specified before fetching FCM Token

Does anyone know how to fix this issue?

 

did you find the solution. I have the same problem

 

Maybe you should upload your .p8 certificate to your Firebase Project Configuration (The cog at the top left menu)

Certificate can be generated inside apple developer account, note that you can only generate few of these, but they works for all your apps

Also add the Capabilities "Background Modes" (check background fetch & Remote notifications) and "Push Notifications" in XCode