Topic: [HOWTO] Hierarchical deterministic wallet (Read 2312 times)

public static void main(String[] args) throws Exception {
byte[] randomBytes=new byte[32];
new SecureRandom().nextBytes(randomBytes);

DeterministicKey key1 = HDKeyDerivation.createMasterPrivateKey(randomBytes).derive(1);
String serialized_xpub = key1.serializePubB58();
String serialized_xpriv = key1.serializePrivB58();

System.out.println("Deterministic tree:");
System.out.println("---- xpub: "+serialized_xpub);
for(int x=0; x<3; x++){
for(int z=0; z<3;z++){
String address=getAddressFromXCoord(serialized_xpub, x, z, false);
String priv=getAddressFromXCoord(serialized_xpriv, x, z, true);
System.out.println("------- derived public address from points "+x+","+z+": "+address+"/"+priv);
}
}
System.out.println("---- xpriv: "+serialized_xpriv);
}

static String getAddressFromCoords(String serialized_x, int x, int z, boolean priv){
NetworkParameters params = MainNetParams.get();
DeterministicKey root_xpub = DeterministicKey.deserializeB58(null,serialized_x);
int x_positive=x>0?x:x*-1, z_positive=z>0?z:z*-1;

DeterministicKey key = HDKeyDerivation.deriveChildKey(root_xpub, new ChildNumber(x_positive, false));
key = HDKeyDerivation.deriveChildKey(key, new ChildNumber(z_positive, false));

if(x<0)
key = HDKeyDerivation.deriveChildKey(key, new ChildNumber(x_positive, false));

if(z<0)
key = HDKeyDerivation.deriveChildKey(key, new ChildNumber(z_positive, false));

if(priv)return key.getPrivateKeyEncoded(params).toString();
else return key.toAddress(params).toString();
}

Deterministic tree:
---- xpub: xpub68yoVWPimjBPNSD9Lp4SzfPbhCVkZpYTxsSJkt1zqt2skkbd9NpR4Q6DFPbtgmnLnkZsbjKnqKuLNTRb3skiBToc6gDAHxyFake78sRwDeG
------- derived public address from points 0,0 public: 12P4who4aXh3g4CX82Np7qkWcQRMtPU142 / private: L3KBFty38whmgDrTPP2r93dK3gtQ6YNokQgYy17QiWp84eK6E6nc
------- derived public address from points 0,1 public: 1LKMC8SHBtcj7bMkwU1rYorGfCYHeocrPC / private: L5cVafedoXX6cWaeL9oCZRUhhPxHo2JTeZ9ovLaQm2vssuH7FQrH
------- derived public address from points 0,2 public: 1Pbn6GW5LNtZVD8Le1ReGSz2QgvDE7e3bc / private: KxUe45V9eC3T6oKG4cUfrnThvqW8hwWqHaWYtqjM1sMQMnxVcVA4
------- derived public address from points 1,0 public: 1H4stLytbwDbmbMAm8FJjs2FEAsHAs7gBu / private: KzkMyHgPLqHNTNidCpwZ8bESKjNvYGYDCdsS59MU4gi65iuaPtUx
------- derived public address from points 1,1 public: 1LbuqXtbYAhJgZhvCmB78doft4BW3FKms4 / private: Kx2YbnfM6To2DwpXkZfjwLVvmphbeK46DJFCvdmFWpoktzDjAvqw
------- derived public address from points 1,2 public: 1AhADvSzuZLvWcHUZH4uQGx1XvkDExUWbT / private: L3eWaZWynXRuXpRzzQgaCC8EpBzXBh76hSnX1LJArGvtP3USaM9C
------- derived public address from points 2,0 public: 16deviewo45m65RqD2FxXTbnmtzUbNTBq / private: KwbxyS65itURqC5aLmkphtZhV3caq2G4QpRbHRTxpcrFbdW3covr
------- derived public address from points 2,1 public: 1FpG3QmDM5FAfyUvLSP5mBsuaPHJcKPwQ / private: KxApcJ2jmvVkf3FBPH5VspFMYTgBdeXHTyo9NxNbyrFon9eZKogo
------- derived public address from points 2,2 public: 1JhTUw5W6HcTAhAqfJik7x9ECznm76m8KY / private: L5826yjT7s6eU9Sk9PEX9ASpB8BFo2fLzAgnjWUXFQWJgdQ8Fiey
---- xpriv: xprv9uzT5zrpwMd69x8gEnXSdXSs9AfGAMpcbeWhxVcPHYVtsxGUbqWAWbmjQ9JvAeLLFVFJXtoJWy8WrMS1Ffg2cvacdXoVuLjmGsjiidJK7Uo