@Test
public void deriveCoin() throws Exception {
DeterministicHierarchy hierarchy = new DeterministicHierarchy(masterKey);
DeterministicKey rootKey = hierarchy.get(BitcoinMain.get().getBip44Path(0), false, true);
chain = new SimpleHDKeyChain(rootKey);
ECKey key1 = chain.getKey(SimpleHDKeyChain.KeyPurpose.RECEIVE_FUNDS);
ECKey key2 = chain.getKey(SimpleHDKeyChain.KeyPurpose.RECEIVE_FUNDS);
final Address address = new Address(BitcoinMain.get(), "1Fp7CA7ZVqZNFVNQ9TpeqWUas7K28K9zig");
assertEquals(address, key1.toAddress(BitcoinMain.get()));
assertEquals(
"1AKqkQM4VqyVis6hscj8695WHPCCzgHNY3", key2.toAddress(BitcoinMain.get()).toString());
assertEquals(key1, chain.findKeyFromPubHash(address.getHash160()));
assertEquals(key2, chain.findKeyFromPubKey(key2.getPubKey()));
key1.sign(Sha256Hash.ZERO_HASH);
ECKey key3 = chain.getKey(SimpleHDKeyChain.KeyPurpose.CHANGE);
assertEquals(
"18YvGiRqXKxrzB72ckfrRSizWeHgwRP94V", key3.toAddress(BitcoinMain.get()).toString());
key3.sign(Sha256Hash.ZERO_HASH);
ECKey key4 = chain.getKey(SimpleHDKeyChain.KeyPurpose.CHANGE);
assertEquals(
"1861TX2MbyPEUrxDQVWgV4Tp9991bK1zpy", key4.toAddress(BitcoinMain.get()).toString());
key4.sign(Sha256Hash.ZERO_HASH);
}
public void encryption(SimpleHDKeyChain unencChain) throws UnreadableWalletException {
DeterministicKey key1 = unencChain.getKey(KeyChain.KeyPurpose.RECEIVE_FUNDS);
SimpleHDKeyChain encChain = unencChain.toEncrypted("open secret");
DeterministicKey encKey1 = encChain.findKeyFromPubKey(key1.getPubKey());
checkEncryptedKeyChain(encChain, key1);
// Round-trip to ensure de/serialization works and that we can store two chains and they both
// deserialize.
List<Protos.Key> serialized = encChain.toProtobuf();
System.out.println(protoToString(serialized));
encChain = SimpleHDKeyChain.fromProtobuf(serialized, encChain.getKeyCrypter());
checkEncryptedKeyChain(encChain, unencChain.findKeyFromPubKey(key1.getPubKey()));
DeterministicKey encKey2 = encChain.getKey(KeyChain.KeyPurpose.RECEIVE_FUNDS);
// Decrypt and check the keys match.
SimpleHDKeyChain decChain = encChain.toDecrypted("open secret");
DeterministicKey decKey1 = decChain.findKeyFromPubHash(encKey1.getPubKeyHash());
DeterministicKey decKey2 = decChain.findKeyFromPubHash(encKey2.getPubKeyHash());
assertEquals(decKey1.getPubKeyPoint(), encKey1.getPubKeyPoint());
assertEquals(decKey2.getPubKeyPoint(), encKey2.getPubKeyPoint());
assertFalse(decKey1.isEncrypted());
assertFalse(decKey2.isEncrypted());
assertNotEquals(encKey1.getParent(), decKey1.getParent()); // parts of a different hierarchy
// Check we can once again derive keys from the decrypted chain.
decChain.getKey(KeyChain.KeyPurpose.RECEIVE_FUNDS).sign(Sha256Hash.ZERO_HASH);
decChain.getKey(KeyChain.KeyPurpose.CHANGE).sign(Sha256Hash.ZERO_HASH);
}
public void serializeUnencrypted(SimpleHDKeyChain keyChain, String expectedSerialization)
throws UnreadableWalletException {
keyChain.setLookaheadSize(10);
keyChain.maybeLookAhead();
DeterministicKey key1 = keyChain.getKey(KeyChain.KeyPurpose.RECEIVE_FUNDS);
DeterministicKey key2 = keyChain.getKey(KeyChain.KeyPurpose.RECEIVE_FUNDS);
DeterministicKey key3 = keyChain.getKey(KeyChain.KeyPurpose.CHANGE);
List<Protos.Key> keys = keyChain.toProtobuf();
// 1 master key, 1 account key, 2 internal keys, 3 derived, 20 lookahead and 5 lookahead
// threshold.
int numItems =
1 // master key/account key
+ 2 // ext/int parent keys
+ (keyChain.getLookaheadSize() + keyChain.getLookaheadThreshold())
* 2 // lookahead zone on each chain
;
assertEquals(numItems, keys.size());
// Get another key that will be lost during round-tripping, to ensure we can derive it again.
DeterministicKey key4 = keyChain.getKey(KeyChain.KeyPurpose.CHANGE);
String sb = protoToString(keys);
assertEquals(expectedSerialization, sb);
// Round trip the data back and forth to check it is preserved.
int oldLookaheadSize = keyChain.getLookaheadSize();
keyChain = SimpleHDKeyChain.fromProtobuf(keys, null);
assertEquals(expectedSerialization, protoToString(keyChain.toProtobuf()));
assertEquals(key1, keyChain.findKeyFromPubHash(key1.getPubKeyHash()));
assertEquals(key2, keyChain.findKeyFromPubHash(key2.getPubKeyHash()));
assertEquals(key3, keyChain.findKeyFromPubHash(key3.getPubKeyHash()));
assertEquals(key4, keyChain.getKey(KeyChain.KeyPurpose.CHANGE));
key1.sign(Sha256Hash.ZERO_HASH);
key2.sign(Sha256Hash.ZERO_HASH);
key3.sign(Sha256Hash.ZERO_HASH);
key4.sign(Sha256Hash.ZERO_HASH);
assertEquals(oldLookaheadSize, keyChain.getLookaheadSize());
}
@Test
public void derive() throws Exception {
ECKey key1 = chain.getKey(SimpleHDKeyChain.KeyPurpose.RECEIVE_FUNDS);
ECKey key2 = chain.getKey(SimpleHDKeyChain.KeyPurpose.RECEIVE_FUNDS);
final Address address = new Address(UnitTestParams.get(), "n1bQNoEx8uhmCzzA5JPG6sFdtsUQhwiQJV");
assertEquals(address, key1.toAddress(UnitTestParams.get()));
assertEquals(
"mnHUcqUVvrfi5kAaXJDQzBb9HsWs78b42R", key2.toAddress(UnitTestParams.get()).toString());
assertEquals(key1, chain.findKeyFromPubHash(address.getHash160()));
assertEquals(key2, chain.findKeyFromPubKey(key2.getPubKey()));
key1.sign(Sha256Hash.ZERO_HASH);
ECKey key3 = chain.getKey(SimpleHDKeyChain.KeyPurpose.CHANGE);
assertEquals(
"mqumHgVDqNzuXNrszBmi7A2UpmwaPMx4HQ", key3.toAddress(UnitTestParams.get()).toString());
key3.sign(Sha256Hash.ZERO_HASH);
}