use &[u8] as params, build error

[gtmickey]

Describe the bug

write an simple method on rust to expose to dart

#[flutter_rust_bridge::frb(sync)]
pub fn from_seed_unchecked(seed: &[u8]) -> String { return PrivateKey::from_seed_unchecked(seed).to_string(); }

then run: flutter_rust_bridge_codegen generate
then: flutter run

error shows

SEVERE: error[E0599]: the method `rust_auto_opaque_decode_ref` exists for struct `RustOpaqueBase<RwLock<[u8]>, MoiArc<RwLock<[u8]>>>`, but its trait bounds were not satisfied
SEVERE:   --> src/frb_generated.rs:68:41
SEVERE:    |
SEVERE: 68 |                 let api_seed = api_seed.rust_auto_opaque_decode_ref();
SEVERE:    |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^ method cannot be called on `RustOpaqueBase<RwLock<[u8]>, MoiArc<RwLock<[u8]>>>` due to unsatisfied trait bounds

Steps to reproduce

a simple method to gen

#[flutter_rust_bridge::frb(sync)]
pub fn from_seed_unchecked(seed: &[u8]) -> String { return PrivateKey::from_seed_unchecked(seed).to_string(); }

Logs

SEVERE: error[E0599]: the method `rust_auto_opaque_decode_ref` exists for struct `RustOpaqueBase<RwLock<[u8]>, MoiArc<RwLock<[u8]>>>`, but its trait bounds were not satisfied
SEVERE:   --> src/frb_generated.rs:68:41
SEVERE:    |
SEVERE: 68 |                 let api_seed = api_seed.rust_auto_opaque_decode_ref();
SEVERE:    |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^ method cannot be called on `RustOpaqueBase<RwLock<[u8]>, MoiArc<RwLock<[u8]>>>` due to unsatisfied trait bounds

### Expected behavior

build success

### Generated binding code

```shell
// This file is automatically generated, so please do not edit it.
// Generated by `flutter_rust_bridge`@ 2.0.0-dev.29.

// ignore_for_file: invalid_use_of_internal_member, unused_import, unnecessary_import

import '../frb_generated.dart';
import 'package:flutter_rust_bridge/flutter_rust_bridge_for_generated.dart';

String privateKeyNew({dynamic hint}) =>
    RustLib.instance.api.privateKeyNew(hint: hint);

String fromSeedUnchecked({required U8 seed, dynamic hint}) =>
    RustLib.instance.api.fromSeedUnchecked(seed: seed, hint: hint);

// Rust type: RustOpaqueMoi<flutter_rust_bridge::for_generated::rust_async::RwLock<[u8]>>
@sealed
class U8 extends RustOpaque {
  U8.dcoDecode(List<dynamic> wire) : super.dcoDecode(wire, _kStaticData);

  U8.sseDecode(int ptr, int externalSizeOnNative)
      : super.sseDecode(ptr, externalSizeOnNative, _kStaticData);

  static final _kStaticData = RustArcStaticData(
    rustArcIncrementStrongCount:
        RustLib.instance.api.rust_arc_increment_strong_count_U8,
    rustArcDecrementStrongCount:
        RustLib.instance.api.rust_arc_decrement_strong_count_U8,
    rustArcDecrementStrongCountPtr:
        RustLib.instance.api.rust_arc_decrement_strong_count_U8Ptr,
  );
}

OS

mac os

Version of flutter_rust_bridge_codegen

^2.0.0-dev.29

Flutter info

[✓] Flutter (Channel stable, 3.19.3, on macOS 14.3 23D56 darwin-arm64, locale zh-Hans-CN)
    • Flutter version 3.19.3 on channel stable at /Users/gtmickey/flutter_3.19.3
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision ba39319843 (4 周前), 2024-03-07 15:22:21 -0600
    • Engine revision 2e4ba9c6fb
    • Dart version 3.3.1
    • DevTools version 2.31.1

[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
    • Android SDK at /Users/gtmickey/Library/Android/sdk
    • Platform android-34, build-tools 34.0.0
    • ANDROID_HOME = /Users/gtmickey/Library/Android/sdk
    • Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 17.0.9+0-17.0.9b1087.7-11185874)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 15.3)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 15E204a
    • CocoaPods version 1.15.2

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

[✓] Android Studio (version 2023.2)
    • 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 17.0.9+0-17.0.9b1087.7-11185874)

Version of clang++

No response

Additional context

No response

[welcome]

Hi! Thanks for opening your first issue here! 😄

[fzyzcjy]

Hi, does Vec<u8> work for you?

[gtmickey]

it works, thanks

[fzyzcjy]

You are welcome!

[github-actions]

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