TypeError: Cannot read property 'keyring' of null

[peter-jim]

I had meet some problem!! please help

======== Exception caught by widgets library ======================================================= LateInitializationError: Local 'built' has not been initialized. The relevant error-causing widget was: Observer file:///D:/android%20flutter/app/app/lib/pages/account/create/backupAccountPage.dart:37:12

TypeError: Cannot read property 'keyring' of null

======== Exception caught by flutter_mobx ========================================================== The following MobXCaughtException was thrown: NoSuchMethodError: invalid member on null: 'keyring'

my flutter and dart version is correctly.it is sdk wrong?

[RomeroYang]

This repo is not a common development tool, you should offer more context before we can help.

Are you developing a plugin with polkawallet_sdk or planning to contribute to the wallet App?

[peter-jim]

yeah! my team member planning to develop the wallet App ,which will participate the hackathon. So we need a wallet.

I‘m using ‘App’ repo, Androidstudio try to develop.And run it in chrome(web)

This application is not configured to build on the web. To add web support to a project, run flutter create .. Launching lib\main.dart on Chrome in debug mode... Waiting for connection from debug service on Chrome... This app is linked to the debug service: ws://127.0.0.1:64577/DGoLmmk1tt4=/ws Debug service listening on ws://127.0.0.1:64577/DGoLmmk1tt4=/ws

Running with unsound null safety For more information see https://dart.dev/null-safety/unsound-null-safety Debug service listening on ws://127.0.0.1:64577/DGoLmmk1tt4=/ws No observables detected in the build method of Observer packages/app/app.dart 363:13 XMLHttpRequest error. js update: polkadot 20601 11201 10011 Error: Unsupported operation: Platform.operatingSystem at Object.throw [as throw] (http://localhost:64518/dart_sdk.js:5348:11) at Function._operatingSystem (http://localhost:64518/dart_sdk.js:56559:17) at Function.get operatingSystem [as operatingSystem] (http://localhost:64518/dart_sdk.js:56605:27) at get _operatingSystem (http://localhost:64518/dart_sdk.js:56518:27) at Function.desc.get [as _operatingSystem] (http://localhost:64518/dart_sdk.js:5853:17) at get isAndroid (http://localhost:64518/dart_sdk.js:56539:26) at Function.desc.get [as isAndroid] (http://localhost:64518/dart_sdk.js:5853:17) at checkUpdate (http://localhost:64518/packages/app/utils/UI.dart.lib.js:1110:56) at checkUpdate.next () at runBody (http://localhost:64518/dart_sdk.js:39250:34) at Object._async [as async] (http://localhost:64518/dart_sdk.js:39281:7) at Function.checkUpdate (http://localhost:64518/packages/app/utils/UI.dart.lib.js:1109:20) at app$._WalletAppState.new._checkUpdate (http://localhost:64518/packages/app/app.dart.lib.js:1712:18) at _checkUpdate.next () at http://localhost:64518/dart_sdk.js:39230:33 at _RootZone.runUnary (http://localhost:64518/dart_sdk.js:39087:58) at _FutureListener.thenAwait.handleValue (http://localhost:64518/dart_sdk.js:34073:29) at handleValueCallback (http://localhost:64518/dart_sdk.js:34633:49) at Function._propagateToListeners (http://localhost:64518/dart_sdk.js:34671:17) at _Future.new.[_completeWithValue] (http://localhost:64518/dart_sdk.js:34513:23) at async._AsyncCallbackEntry.new.callback (http://localhost:64518/dart_sdk.js:34536:35) at Object._microtaskLoop (http://localhost:64518/dart_sdk.js:39374:13) at _startMicrotaskLoop (http://localhost:64518/dart_sdk.js:39380:13) at http://localhost:64518/dart_sdk.js:34887:9 js file loaded

======== Exception caught by flutter_mobx ========================================================== The following MobXCaughtException was thrown: NoSuchMethodError: invalid member on null: 'keyring'

When the exception was thrown, this was the stack: packages/app/pages/account/create/backupAccountPage.dart 94:58 packages/flutter_mobx/src/observer.dart 43:48 build packages/flutter/src/widgets/framework.dart 4648:28 build packages/flutter_mobx/src/observer_widget_mixin.dart 77:21 packages/mobx/src/core/context.dart 250:20 trackDerivation ...

TypeError: Cannot read property 'keyring' of null at apiAccount.ApiAccount.new.generateAccount (http://localhost:64518/packages/app/service/apiAssets.dart.lib.js:216:59) at generateAccount.next () at runBody (http://localhost:64518/dart_sdk.js:39250:34) at Object._async [as async] (http://localhost:64518/dart_sdk.js:39281:7) at apiAccount.ApiAccount.new.generateAccount (http://localhost:64518/packages/app/service/apiAssets.dart.lib.js:215:20) at backupAccountPage._BackupAccountPageState.new.initState (http://localhost:64518/packages/app/pages/account/create/backupAccountPage.dart.lib.js:1463:35) (http://localhost:64518/packages/flutter/src/widgets/widget_span.dart.lib.js:46145:31)

---

If I use my cell phone,it show error like this

FAILURE: Build failed with an exception.

• What went wrong: Unable to start the daemon process. This problem might be caused by incorrect configuration of the daemon. For example, an unrecognized jvm option is used. Please refer to the User Manual chapter on the daemon at https://docs.gradle.org/6.5/userguide/gradle_daemon.html Process command line: C:\Program Files (x86)\Java\jre1.8.0_281\bin\java.exe -Xmx1536M -Dfile.encoding=GBK -Duser.country=CN -Duser.language=zh -Duser.variant -cp C:\Users\Lance.gradle\wrapper\dists\gradle-6.5-all\2oz4ud9k3tuxjg84bbf55q0tn\gradle-6.5\lib\gradle-launcher-6.5.jar org.gradle.launcher.daemon.bootstrap.GradleDaemon 6.5 Please read the following process output to find out more:

  Error occurred during initialization of VM Could not reserve enough space for 1572864KB object heap

• Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

• Get more help at https://help.gradle.org Exception: Gradle task assembleDebug failed with exit code 1

[RomeroYang]

This app can not run in web, it has several dependencies calling Android/IOS native libs through message channels.

Try https://polkadot.js.org/ Chrome extension for hackthon development.

[peter-jim]

thank you! finally I get the following bug

FAILURE: Build completed with 2 failures.

1: Task failed with an exception.

• Where: Build file 'D:\flutterNewSdk\flutter.pub-cache\hosted\pub.flutter-io.cn\connectivity_plus-1.0.4\android\build.gradle' line: 22

• What went wrong: A problem occurred evaluating project ':connectivity_plus'.

  Could not get unknown property 'javaToolchains' for task ':app:compileDebugJavaWithJavac' of type org.gradle.api.tasks.compile.JavaCompile.

• Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

2: Task failed with an exception.

• Where: Script 'D:\flutterNewSdk\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 346

• What went wrong: A problem occurred configuring project ':connectivity_plus'.

  Could not get unknown property 'android' for project ':connectivity_plus' of type org.gradle.api.Project.

• Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

• Get more help at https://help.gradle.org

BUILD FAILED in 1s Exception: Gradle task assembleDebug failed with exit code 1