FlutterBIP39助记词生成插件substrate_bip39的使用

发布于 1周前 作者 htzhanglong 来自 Flutter

FlutterBIP39助记词生成插件substrate_bip39的使用

简介

substrate_bip39 是一个用于从BIP39助记词派生秘密密钥的包，遵循 substrate-bip39 标准。以下是该插件的详细用法示例。

使用方法

1. 简单的BIP39助记词

import 'package:convert/convert.dart' show hex;
import 'package:substrate_bip39/substrate_bip39.dart';

void main() async {
  final phrase = 'ozone drill grab fiber curtain grace pudding thank cruise elder eight picnic';
  
  final seed = await SubstrateBip39.ed25519.seedFromUri(phrase);
  print('Seed: ${hex.encode(seed)}');
  assert(hex.encode(seed) == 'ae2383139b3aa529c5997ed82f62def14243fbf92bc9ef7badf72e0ff289ea82');
}

2. Substrate Junctions和密码

import 'package:convert/convert.dart' show hex;
import 'package:substrate_bip39/substrate_bip39.dart';

void main() async {
  final phrase = 'vessel ladder alter error federal sibling chat ability sun glass valve picture//0///password';

  // Ed25519
  final ed25519Seed = await SubstrateBip39.ed25519.seedFromUri(phrase);
  print('Ed25519 Seed: ${hex.encode(ed25519Seed)}');
  assert(hex.encode(ed25519Seed) == 'd77ca3404e232ff317509d5da871495f9f5bade1821a84216d7070fc92c9bedb');

  // Ecdsa
  final ecdsaSeed = await SubstrateBip39.ecdsa.seedFromUri(phrase);
  print('Ecdsa Seed: ${hex.encode(ecdsaSeed)}');
  assert(hex.encode(ecdsaSeed) == 'cfacf223c22a3ce5758b07be3c16fffd47acfec5a0bb5e0d71f3c21f87e22333');
}

3. Substrate开发账户

import 'package:convert/convert.dart' show hex;
import 'package:substrate_bip39/substrate_bip39.dart';

void main() async {
  final phrase = '//Alice';
  
  final seed = await SubstrateBip39.ed25519.seedFromUri(phrase);
  print('Seed: ${hex.encode(seed)}');
  assert(hex.encode(seed) == 'abf8e5bdbe30c65656c0a3cbd181ff8a56294a69dfedd27982aace4a76909115');
}

4. 从熵生成512位种子

import 'package:convert/convert.dart' show hex;
import 'package:substrate_bip39/substrate_bip39.dart';

void main() async {
  final entropy = hex.decode('59d1d7b63fbc9a343360a7dabc035f66d7504c549696d2b0b1ae56862911a821');
  
  final seed = await SubstrateBip39.seedFromEntropy(entropy);
  print('Seed: ${hex.encode(seed)}');
  assert(hex.encode(seed) == '38b35a8cfbad9e9ca3ed4260be142b8237494aea83dee55d24f6228d4014b5736f40f51ebb8ddab08c31da0da394a0e0f68cb0e06402497e31908e942bf79d78');
}

5. 从熵生成256位种子

import 'package:convert/convert.dart' show hex;
import 'package:substrate_bip39/substrate_bip39.dart';

void main() async {
  final entropy = hex.decode('59d1d7b63fbc9a343360a7dabc035f66d7504c549696d2b0b1ae56862911a821');
  
  final seed = await SubstrateBip39.miniSecretFromEntropy(entropy);
  print('Seed: ${hex.encode(seed)}');
  assert(hex.encode(seed) == '38b35a8cfbad9e9ca3ed4260be142b8237494aea83dee55d24f6228d4014b573');
}

完整示例Demo

以下是一个完整的Flutter应用示例，展示了如何在Flutter项目中使用substrate_bip39包：

import 'package:flutter/material.dart';
import 'package:convert/convert.dart';
import 'package:substrate_bip39/substrate_bip39.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'substrate_bip39 Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'substrate_bip39 Demo'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key? key, required this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  String _seed = '';

  Future<void> _generateSeed() async {
    final phrase = 'ozone drill grab fiber curtain grace pudding thank cruise elder eight picnic';
    final seed = await SubstrateBip39.ed25519.seedFromUri(phrase);
    setState(() {
      _seed = hex.encode(seed);
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              'Generated Seed:',
            ),
            Text(
              '$_seed',
              style: Theme.of(context).textTheme.headline4,
            ),
            SizedBox(height: 20),
            ElevatedButton(
              onPressed: _generateSeed,
              child: Text('Generate Seed'),
            ),
          ],
        ),
      ),
    );
  }
}

这个示例应用程序包含了一个按钮，点击后会生成并显示一个基于给定助记词的种子。希望这些信息对你有所帮助！


更多关于FlutterBIP39助记词生成插件substrate_bip39的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html

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1 回复

更多关于FlutterBIP39助记词生成插件substrate_bip39的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html


当然，下面是如何在Flutter项目中使用substrate_bip39插件来生成BIP39助记词的代码示例。substrate_bip39是一个用于生成BIP39助记词的Flutter插件，基于BIP39（Bitcoin Improvement Proposals #39）标准。

步骤 1: 添加依赖

首先，你需要在pubspec.yaml文件中添加substrate_bip39依赖。

dependencies:
  flutter:
    sdk: flutter
  substrate_bip39: ^最新版本号  # 请替换为实际的最新版本号

然后运行flutter pub get来安装依赖。

步骤 2: 导入插件

在你的Dart文件中导入substrate_bip39插件。

import 'package:substrate_bip39/substrate_bip39.dart';

步骤 3: 生成BIP39助记词

下面是一个完整的示例，展示了如何生成BIP39助记词。

import 'package:flutter/material.dart';
import 'package:substrate_bip39/substrate_bip39.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('BIP39 助记词生成'),
        ),
        body: Center(
          child: GenerateMnemonicWords(),
        ),
      ),
    );
  }
}

class GenerateMnemonicWords extends StatefulWidget {
  @override
  _GenerateMnemonicWordsState createState() => _GenerateMnemonicWordsState();
}

class _GenerateMnemonicWordsState extends State<GenerateMnemonicWords> {
  String mnemonicWords = '';

  @override
  void initState() {
    super.initState();
    _generateMnemonicWords();
  }

  void _generateMnemonicWords() async {
    try {
      String result = await Bip39.generateMnemonic(strength: 256);  // 你可以指定强度，比如128, 160, 192, 224, 256位
      setState(() {
        mnemonicWords = result;
      });
    } catch (e) {
      print('生成助记词失败: $e');
    }
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: <Widget>[
        Text(
          '生成的BIP39助记词:',
          style: TextStyle(fontSize: 20),
        ),
        Text(
          mnemonicWords,
          style: TextStyle(fontSize: 16),
          maxLines: 10,  // 根据需要调整显示的行数
          overflow: TextOverflow.ellipsis,
        ),
      ],
    );
  }
}

注意事项

  1. 异步操作：Bip39.generateMnemonic是一个异步方法，因此需要使用async和await来处理。
  2. 错误处理：在实际应用中，最好添加更多的错误处理逻辑，以确保在生成助记词失败时能够妥善处理。
  3. UI优化：上述示例的UI非常基础，你可以根据需求进行更复杂的UI设计。

这个示例展示了如何在Flutter应用中使用substrate_bip39插件生成BIP39助记词。希望这对你有帮助！

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