App Check not printing debug token to console for iOS using Flutter

[HaydenHMSD]

Up until a few months ago my Flutter project was printing to the console all the Firebase logs including the debug token for App Check.

They have stopped being printed now.

Everything shows up and works correctly on Android

in my pubspec I have added

  firebase_app_check: ^0.3.2
  firebase_core: ^3.10.0
  firebase_crashlytics: ^4.3.0
  firebase_performance: ^0.10.1
  firebase_messaging: ^15.2.0
  firebase_remote_config: ^5.3.0

I am running the app on iOS 18, both device and simulator.
I haven't changed the App Check configurations in Firebase since the first time it started working.

This is my current Flutter Doctor:

    • Flutter version 3.24.5 on channel stable at /Users/haydenyoung/DevTools/Flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision dec2ee5c1f (8 weeks ago), 2024-11-13 11:13:06 -0800
    • Engine revision a18df97ca5
    • Dart version 3.5.4
    • DevTools version 2.37.3

[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
    • Android SDK at /Users/haydenyoung/Library/Android/sdk
    • Platform android-34, build-tools 34.0.0
    • ANDROID_HOME = /Users/haydenyoung/Library/Android/sdk
    • Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 21.0.3+-79915915-b509.11)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 16.2)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 16C5032a
    • CocoaPods version 1.16.2

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2024.2)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 21.0.3+-79915915-b509.11)

[✓] VS Code (version 1.95.3)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.102.0

my implementation in code has not changed

await FirebaseAppCheck.instance.activate(
        webProvider: ReCaptchaV3Provider('recaptcha-v3-site-key'),
        androidProvider: AndroidProvider.debug,
        appleProvider: AppleProvider.debug,
      );
final token = await appCheck.getToken();
      dev.log('token: $token');

[SelaseKay]

Hi @HaydenHMSD, I couldn't reproduce this issue using the current firebase_app_check example app. It successfully prints the debug token on my end. Are there any errors related to app_check in your logs?

[HaydenHMSD]

@SelaseKay thanks for the reply!

I don't get any error logs printed apart from the usual:

- URL: https://firebaseappcheck.googleapis.com/v1/projects/{project-name}/apps/1{app-id}:exchangeDebugToken 
 - HTTP status code: 403 
 - Response body: {
  "error": {
    "code": 403,
    "message": "App attestation failed.",
    "status": "PERMISSION_DENIED"
  }
}

which is expected when I haven't added the debug token to app_check.

I've not seen any logs on Firebase.

This started happening probably around sometime after updating Android Studio to Ladybug, or with the release of iOS 18 if that helps with anything.
That said, I did try build the app with the previous version of Android Studio and for iOS 17 and I still don't get the logs.

[SelaseKay]

Thanks for the additional feedback. A clear way to reproduce this will be much appreciated as I haven't been able to reproduce this issue on my end.

[HaydenHMSD]

I wish I could tell you more, but I'm not sure what else to look at.

I don't know if some configuration changed without me knowing

I've tried building from Android Studio, VS Code and Xcode as well as looking at the console on DevTools. I've tried building to device and simulator too. None of the firebase logs show up.

I've also added the -FIRDebugEnabled flag into the "Arguments passed on launch" for the schemes in Xcode but that didn't do anything.

Is there anything else that I could share that isn't the project itself?

[SelaseKay]

Are you able to reproduce this is in a new flutter project?