Error: 'Uint8List' is restricted and can't be extended or implemented.

[muriloventuroso]

I am getting this error when running:

ERROR: ../../../.pub-cache/hosted/pub.dartlang.org/pinenacl-0.2.1/lib/api/api.dart:24:7: Error: 'Uint8List' is restricted and can't be extended or implemented.
ERROR: class ByteList with ListMixin<int>, Encodable implements Uint8List {
ERROR:       ^

Flutter Doctor:

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel master, 2.3.0-13.0.pre.136, on Arch Linux 5.12.6-arch1-1, locale pt_BR.UTF-8)
[!] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
    ✗ cmdline-tools component is missing
    ✗ Android license status unknown.
      Run `flutter doctor --android-licenses` to accept the SDK licenses.
      See https://flutter.dev/docs/get-started/install/linux#android-setup for more details.
[✗] Chrome - develop for the web (Cannot find Chrome executable at google-chrome)
    ! Cannot find Chrome. Try setting CHROME_EXECUTABLE to a Chrome executable.
[✓] Linux toolchain - develop for Linux desktop
[✓] Android Studio (version 4.1)
[✓] Connected device (1 available)

! Doctor found issues in 2 categories.

[ilap]

Uuugh, it's seems that Android's Java restricts the unsigned byte class to be implemented or extended.
Can you pls paste some more error messages, and let me know how to reproduce the issue as I did not tried this library with flutter.
Also, can you pls switch to stable channel?

[ilap]

I think we're screwed.

dart-lang/sdk#45115

[ilap]

Ok, I was able to do a dirty-refactoring in 30 minutes, but I need to think about which one is the right path.
Check https://github.com/ilap/pinenacl-dart/tree/sealed-class-restriction

[muriloventuroso]

Wow, that was fast! I still haven't been able to fully test it, but it has already solved my problem, being able to do the build.
Everything seems to work again. I upgraded my app to null-safety and I used a package that was already abandoned. Your package fit perfectly.
It's late here, but tomorrow I'm going to do more tests.
Thanks for the package and for the quick response!

[ilap]

It was refactored and can be closed.