手把手教你使用Java生成助记词、私钥、地址｜Java区块链钱包生成助记词、地址

一、引入依赖

在spring boot 项目中的 pom.xml文件中加入需要的依赖

<dependency>
	<groupId>org.bitcoinj</groupId>
	<artifactId>bitcoinj-core</artifactId>
	<version>0.14.7</version>
</dependency>

<!-- 后面讲解签名转账交易 -->
<dependency>
	<groupId>org.web3j</groupId>
	<artifactId>core</artifactId>
	<version>3.6.0</version>
</dependency>

二、创建工具类

1、定义常量

    /**
     * path路径
     */
    private final static ImmutableList<ChildNumber> BIP44_ETH_ACCOUNT_ZERO_PATH =
            ImmutableList.of(new ChildNumber(44, true), new ChildNumber(60, true),
                    ChildNumber.ZERO_HARDENED, ChildNumber.ZERO);

2、创建 createWallet 方法

/**
     * 创建钱包
     * @throws MnemonicException.MnemonicLengthException
     */
    private static void createWallet()  throws MnemonicException.MnemonicLengthException {
    
    
        SecureRandom secureRandom = new SecureRandom();
        byte[] entropy = new byte[DeterministicSeed.DEFAULT_SEED_ENTROPY_BITS / 8];
        secureRandom.engineNextBytes(entropy);

        //生成12位助记词
        List<String>  str = MnemonicCode.INSTANCE.toMnemonic(entropy);

        //使用助记词生成钱包种子
        byte[] seed = MnemonicCode.toSeed(str, "");
        DeterministicKey masterPrivateKey = HDKeyDerivation.createMasterPrivateKey(seed);
        DeterministicHierarchy deterministicHierarchy = new DeterministicHierarchy(masterPrivateKey);
        DeterministicKey deterministicKey = deterministicHierarchy
                .deriveChild(BIP44_ETH_ACCOUNT_ZERO_PATH, false, true, new ChildNumber(0));
        byte[] bytes = deterministicKey.getPrivKeyBytes();
        ECKeyPair keyPair = ECKeyPair.create(bytes);
        //通过公钥生成钱包地址
        String address = Keys.getAddress(keyPair.getPublicKey());

        System.out.println();
        System.out.println("助记词：");
        System.out.println(str);
        System.out.println();
        System.out.println("地址：");
        System.out.println("0x"+address);
        System.out.println();
        System.out.println("私钥：");
        System.out.println("0x"+keyPair.getPrivateKey().toString(16));
        System.out.println();
        System.out.println("公钥：");
        System.out.println(keyPair.getPublicKey().toString(16));
    }

3、调用结果

助记词：
[length, shaft, sponsor, ankle, during, bullet, coil, sketch, connect, another, stock, digital]

地址：
0x4c78c36e376eb1d701b415eaffc15c29c2170981

私钥：
0x47ae411da5eb66894aa0dae8ca888128205cc7cb23b38675904fda5545c6b2d5

公钥：
bed6ad054f6bacfa1a042a33bb89b51bdfedd883d24558cc3563ebf0cb25cc274fb4bf299f3684a8eb36f4b6c9b5b8add3b1bd6fc1b1178269995bf935d8becb

4、私钥 导入到 MetaMask 钱包验证 。

可见恢复的地址和我们生成地址一样。