🐛 [APP_CHECK] App Check keeps returning a invalid token on android

[Andrushka1012]

I created this issue cause the previous one was not properly solved. Using debug variant on production is not a solution and is restricted on official docs page.

After setup playintegrity in Firebase, the appcheck plugin for flutter android always app returns token eyJlcnJvciI6IlVOS05PV05fRVJST1IifQ==.
In that string encoded -> {"error":"UNKNOWN_ERROR"} in base64.

[darshankawar]

Thanks for the report @Andrushka1012
Can you provide flutter doctor -v, complete error log and a reproducible code sample that we can use that shows the reported behavior ?

[Andrushka1012]

Hi, @darshankawar . Here is my flutter doctor:
[✓] Flutter (Channel stable, 3.7.11, on macOS 13.3.1 22E772610a darwin-x64, locale en-GB)
• Flutter version 3.7.11 on channel stable at /Users/andriimakarenko/Desktop/euvic/flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision f72efea43c (5 weeks ago), 2023-04-11 11:57:21 -0700
• Engine revision 1a65d409c7
• Dart version 2.19.6
• DevTools version 2.20.1

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
• Android SDK at /Users/andriimakarenko/Library/Android/sdk
• Platform android-33, build-tools 30.0.3
• Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 11.0.15+0-b2043.56-8887301)
• All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 14.3)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Build 14E222b
• CocoaPods version 1.12.0

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

[✓] Android Studio (version 2022.1)
• 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 11.0.15+0-b2043.56-8887301)

[✓] IntelliJ IDEA Ultimate Edition (version 2021.1.3)
• IntelliJ at /Applications/IntelliJ IDEA.app
• 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

[✓] Connected device (4 available)
• Pixel 6 (mobile) • 19061FDF6006MD • android-arm64 • Android 13 (API 33)
• iPhone 14 Pro (mobile) • C0747B85-B9E6-42CC-9442-825BEC23ABD4 • ios • com.apple.CoreSimulator.SimRuntime.iOS-16-4 (simulator)
• macOS (desktop) • macos • darwin-x64 • macOS 13.3.1 22E772610a darwin-x64
• Chrome (web) • chrome • web-javascript • Google Chrome 113.0.5672.92

[✓] HTTP Host Availability
• All required HTTP hosts are available

• No issues found!

Steps to reproduce is actually same as in #7998.
After I setup app check play integrity for my firebase project

Firebase.initializeApp().then((value) async {
      await FirebaseAppCheck.instance.activate(
        appleProvider: AppleProvider.appAttestWithDeviceCheckFallback,
        androidProvider: AndroidProvider.playIntegrity,
      );
    }

and then

FirebaseAppCheck.instance.getToken().

This returns me as a result eyJlcnJvciI6IlVOS05PV05fRVJST1IifQ==

[darshankawar]

@Andrushka1012
This has probably been fixed #10167. Please check the same and see if it helps in your case.

[google-oss-bot]

Hey @Andrushka1012. We need more information to resolve this issue but there hasn't been an update in 7 weekdays. I'm marking the issue as stale and if there are no new updates in the next 7 days I will close it automatically.

If you have more information that will help us get to the bottom of this, just add a comment!