首先第一步創(chuàng)建助記詞跟通過助記詞獲取私鑰

import 'dart:typed_data'; // 強制使用標(biāo)準(zhǔn)庫的 Uint8List
import 'package:bip39/bip39.dart' as bip39;
import 'package:bip32/bip32.dart' as bip32;
import 'package:hex/hex.dart';

class WalletService {
  // 生成助記詞
  static String generateMnemonic() {
    return bip39.generateMnemonic();
  }
  // 從助記詞生成以太坊私鑰（完全兼容 MetaMask）
  static String generateEthereumPrivateKey(String mnemonic) {
    print('開始生成私鑰...');
    print('助記詞: $mnemonic');
    
    // 1. 從助記詞生成種子
    final seed = bip39.mnemonicToSeed(mnemonic);
    final seedHex = bip39.mnemonicToSeedHex(mnemonic);
    print('種子: $seedHex');
    
    // 2. 生成主私鑰
    final masterKey = bip32.BIP32.fromSeed(seed);
    print('主私鑰: ${HEX.encode(masterKey.privateKey?.toList() ?? [])}');
    print('主鏈碼: ${HEX.encode(masterKey.chainCode)}');
    
    // 3. 派生以太坊私鑰
    final path = "m/44'/60'/0'/0/0";
    print('派生路徑: $path');
    
    final childKey = masterKey.derivePath(path);
    if (childKey.privateKey == null) {
      throw Exception('無法派生私鑰');
    }
    
    // 4. 轉(zhuǎn)換為十六進(jìn)制字符串
    final privateKeyHex = HEX.encode(childKey.privateKey!.toList());
    print('最終私鑰: $privateKeyHex');
    
    return '0x$privateKeyHex';
  }

  // 驗證助記詞是否有效
  static bool validateMnemonic(String mnemonic) {
    return bip39.validateMnemonic(mnemonic);
  }
}