Filecoin java 离线生成地址

Posted 2021-05-09 jc0803kevin

使用DeterministicKey以路径BIP44

filecoin 的子路径为461

import cn.hutool.core.codec.Base32;
import com.google.common.collect.ImmutableList;
import org.bitcoinj.core.ECKey;
import org.bitcoinj.crypto.ChildNumber;
import org.bitcoinj.crypto.DeterministicHierarchy;
import org.bitcoinj.crypto.DeterministicKey;
import org.bitcoinj.crypto.HDKeyDerivation;
import org.web3j.crypto.MnemonicUtils;
import org.web3j.utils.Numeric;
import ove.crypto.digest.Blake2b;

public class Address {

    public static final ChildNumber FIL_HARDENED = new ChildNumber(461, true);

    public static String getBip44Credentials(String mnemonicWords, String passPhrase, int number) {
        byte[] seed = MnemonicUtils.generateSeed(mnemonicWords, passPhrase);
        DeterministicKey rootPrivateKey = HDKeyDerivation.createMasterPrivateKey(seed);
        DeterministicHierarchy deterministicHierarchy = new DeterministicHierarchy(rootPrivateKey);
        ImmutableList path = ImmutableList.of(new ChildNumber(44, true), FIL_HARDENED, ChildNumber.ZERO_HARDENED);
        DeterministicKey fourpath = deterministicHierarchy.get(path, true, true);
        DeterministicKey fourpathhd = HDKeyDerivation.deriveChildKey(fourpath, 0);
        DeterministicKey fivepathhd = HDKeyDerivation.deriveChildKey(fourpathhd, number);
        Blake2b.Digest blake2b1 = Blake2b.Digest.newInstance(20);
        ECKey ecKey = ECKey.fromPrivate(fivepathhd.getPrivKey(),false);
        String pulStr = ecKey.getPublicKeyAsHex();
        System.out.println("getPublicKeyAsHex    "+ecKey.getPublicKeyAsHex());
        System.out.println("getPrivateKeyAsHex   "+ecKey.getPrivateKeyAsHex());

        byte[] bytes = Numeric.hexStringToByteArray(pulStr);
        byte[] black2HashByte = blake2b1.digest(bytes);
        String black2HashStr = Numeric.toHexStringNoPrefix(black2HashByte);
        String black2HashSecond = "0x01"+black2HashStr;
        Blake2b.Digest blake2b2 = Blake2b.Digest.newInstance(4);

        byte[] checksumBytes = blake2b2.digest(Numeric.hexStringToByteArray(black2HashSecond));
        byte[] addressBytes = new byte[black2HashByte.length + checksumBytes.length];
        System.arraycopy(black2HashByte, 0, addressBytes, 0, black2HashByte.length);
        System.arraycopy(checksumBytes, 0, addressBytes, black2HashByte.length,checksumBytes.length);
        //f 正式 t 测试 1 钱包 2 合约
        return "f1"+ Base32.encode(addressBytes);
    }

    public static String fromPub(String pubKeyAsHex){
        Blake2b.Digest blake2b1 = Blake2b.Digest.newInstance(20);
        byte[] bytes = Numeric.hexStringToByteArray(pubKeyAsHex);
        byte[] black2HashByte = blake2b1.digest(bytes);
        String black2HashStr = Numeric.toHexStringNoPrefix(black2HashByte);
        String black2HashSecond = "0x01"+black2HashStr;
        Blake2b.Digest blake2b2 = Blake2b.Digest.newInstance(4);

        byte[] checksumBytes = blake2b2.digest(Numeric.hexStringToByteArray(black2HashSecond));
        byte[] addressBytes = new byte[black2HashByte.length + checksumBytes.length];
        System.arraycopy(black2HashByte, 0, addressBytes, 0, black2HashByte.length);
        System.arraycopy(checksumBytes, 0, addressBytes, black2HashByte.length,checksumBytes.length);
        //f 正式 t 测试 1 钱包 2 合约
        return "f1"+ Base32.encode(addressBytes);
    }

}