[币严BIZZAN区块链]Java生成ETH钱包助记词、私钥、地址

本文主要介绍在Java工程中如何生成ETH钱包的助记词、私钥、地址。

一、在之前创建的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>
 
<dependency>
    <groupId>org.web3j</groupId>
    <artifactId>core</artifactId>
    <version>3.6.0</version>
</dependency>

二、创建一个Wallet.java类

1、定义一个path路径常量

    /**
     * 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、创建一个 createWallet 方法体

/**
     * 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.nextBytes(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、写一个main方法调用  createWallet 方法。

  public static void main(String[] args) throws Exception {
        //创建钱包
        createWallet();
    }

4、执行main方法 查看输出的钱包信息

助记词：
[usage, universe, dress, client, gold, wealth, short, diet, tourist, leave, roof, conduct]

地址：
0x1f3220b4651503bfe53bb96997fa547c4bc0fdaa

私钥：
0xa91f672a0c2094d20f3beeb4f47e2ce6c356e9081c74d7e3cd261f1bdc279a0b

公钥：
462aa97d90c49eaa4ec98c44a64c44606049be5d168c5461c8ed49762fa130d7b3201b336bac26e871c04f5aa84a0d0c868ffd0e04ad2b11d01561d6bb99eb1

5、验证

将上述生成的私钥或助记词在任意支持ETH的钱包中导入，可以看到地址与我们生成的一致，至此说明成功！

附：

完整代码

package com.bizzan.test;

import java.security.SecureRandom;
import java.util.List;

import org.bitcoinj.crypto.ChildNumber;
import org.bitcoinj.crypto.DeterministicHierarchy;
import org.bitcoinj.crypto.DeterministicKey;
import org.bitcoinj.crypto.HDKeyDerivation;
import org.bitcoinj.crypto.MnemonicCode;
import org.bitcoinj.crypto.MnemonicException;
import org.bitcoinj.wallet.DeterministicSeed;
import org.web3j.crypto.ECKeyPair;
import org.web3j.crypto.Keys;

import com.google.common.collect.ImmutableList;

public class Wallet {
    /**
     * 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);

    public static void main(String[] args) throws Exception {
        //创建钱包
        createWallet();
    }
    
    /**
     * 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.nextBytes(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));
    }

}

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