2019-11-20

eos 支持bip44 与助记词管理
jar包

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

还有 eos4j （可以去github找）

     public static final ChildNumber EOS_HARDENED = new ChildNumber(194, true);//eos是194
//助记词生成私钥
    public String getBip44pk(List<String> mnemonicWords, String passPhrase, int number) {
        String words = Joiner.on(" ").join(mnemonicWords);
        byte[] seed = MnemonicUtils.generateSeed(words, passPhrase);
      //  ChildNumber ethindex = checkNetStatus() ? EOS_HARDENED : ONE_HARDENED;
        DeterministicKey rootPrivateKey = HDKeyDerivation.createMasterPrivateKey(seed);
        DeterministicHierarchy deterministicHierarchy = new DeterministicHierarchy(rootPrivateKey);
        ImmutableList<ChildNumber> path = ImmutableList.of(new ChildNumber(44, true), EOS_HARDENED, 
       ChildNumber.ZERO_HARDENED);
        DeterministicKey fourpath = deterministicHierarchy.get(path, true, true);
        DeterministicKey fourpathhd = HDKeyDerivation.deriveChildKey(fourpath, 0);
        DeterministicKey fivepathhd = HDKeyDerivation.deriveChildKey(fourpathhd, number);//默认number为0 取第一个 主流钱包一般是第一个
        byte[] privateKeyByte = fivepathhd.getPrivKeyBytes();
        byte[] a = { (byte) 0x80 };
        byte[] b = new BigInteger(privateKeyByte).toByteArray();
        byte[] private_key = ByteUtils.concat(a, b);
        byte[] checksum = Sha.SHA256(private_key);
        checksum = Sha.SHA256(checksum);
        byte[] check = ByteUtils.copy(checksum, 0, 4);
        byte[] pk = ByteUtils.concat(private_key, check);
        String encode = Base58.encode(pk);
        return encode;
       // 私钥生成地址 String address = Ecc.privateToPublic(encode);//地址就可以拿去注册eos账户了
    }