@Test
public void testHeaderParse() throws Exception {
Block block = params.getDefaultSerializer().makeBlock(blockBytes);
Block header = block.cloneAsHeader();
Block reparsed = params.getDefaultSerializer().makeBlock(header.bitcoinSerialize());
assertEquals(reparsed, header);
}
@Test
public void testProofOfWork() throws Exception {
// This params accepts any difficulty target.
NetworkParameters params = UnitTestParams.get();
Block block = params.getDefaultSerializer().makeBlock(blockBytes);
block.setNonce(12346);
try {
block.verify(Block.BLOCK_HEIGHT_GENESIS, EnumSet.noneOf(Block.VerifyFlag.class));
fail();
} catch (VerificationException e) {
// Expected.
}
// Blocks contain their own difficulty target. The BlockChain verification mechanism is what
// stops real blocks
// from containing artificially weak difficulties.
block.setDifficultyTarget(Block.EASIEST_DIFFICULTY_TARGET);
// Now it should pass.
block.verify(Block.BLOCK_HEIGHT_GENESIS, EnumSet.noneOf(Block.VerifyFlag.class));
// Break the nonce again at the lower difficulty level so we can try solving for it.
block.setNonce(1);
try {
block.verify(Block.BLOCK_HEIGHT_GENESIS, EnumSet.noneOf(Block.VerifyFlag.class));
fail();
} catch (VerificationException e) {
// Expected to fail as the nonce is no longer correct.
}
// Should find an acceptable nonce.
block.solve();
block.verify(Block.BLOCK_HEIGHT_GENESIS, EnumSet.noneOf(Block.VerifyFlag.class));
assertEquals(block.getNonce(), 2);
}
@Test
public void testLastBlockSeenHash() throws Exception {
// Test the lastBlockSeenHash field works.
// LastBlockSeenHash should be empty if never set.
Wallet wallet = new Wallet(params);
Protos.Wallet walletProto = new WalletProtobufSerializer().walletToProto(wallet);
ByteString lastSeenBlockHash = walletProto.getLastSeenBlockHash();
assertTrue(lastSeenBlockHash.isEmpty());
// Create a block.
Block block = params.getDefaultSerializer().makeBlock(BlockTest.blockBytes);
Sha256Hash blockHash = block.getHash();
wallet.setLastBlockSeenHash(blockHash);
wallet.setLastBlockSeenHeight(1);
// Roundtrip the wallet and check it has stored the blockHash.
Wallet wallet1 = roundTrip(wallet);
assertEquals(blockHash, wallet1.getLastBlockSeenHash());
assertEquals(1, wallet1.getLastBlockSeenHeight());
// Test the Satoshi genesis block (hash of all zeroes) is roundtripped ok.
Block genesisBlock = MainNetParams.get().getGenesisBlock();
wallet.setLastBlockSeenHash(genesisBlock.getHash());
Wallet wallet2 = roundTrip(wallet);
assertEquals(genesisBlock.getHash(), wallet2.getLastBlockSeenHash());
}
@Test
public void testBlockVerification() throws Exception {
Block block = params.getDefaultSerializer().makeBlock(blockBytes);
block.verify(Block.BLOCK_HEIGHT_GENESIS, EnumSet.noneOf(Block.VerifyFlag.class));
assertEquals(
"00000000a6e5eb79dcec11897af55e90cd571a4335383a3ccfbc12ec81085935",
block.getHashAsString());
}
@Test
public void testBitcoinSerialization() throws Exception {
// We have to be able to reserialize everything exactly as we found it for hashing to work. This
// test also
// proves that transaction serialization works, along with all its subobjects like scripts and
// in/outpoints.
//
// NB: This tests the bitcoin serialization protocol.
Block block = params.getDefaultSerializer().makeBlock(blockBytes);
assertTrue(Arrays.equals(blockBytes, block.bitcoinSerialize()));
}
@Test
public void testBadTransactions() throws Exception {
Block block = params.getDefaultSerializer().makeBlock(blockBytes);
// Re-arrange so the coinbase transaction is not first.
Transaction tx1 = block.transactions.get(0);
Transaction tx2 = block.transactions.get(1);
block.transactions.set(0, tx2);
block.transactions.set(1, tx1);
try {
block.verify(Block.BLOCK_HEIGHT_GENESIS, EnumSet.noneOf(Block.VerifyFlag.class));
fail();
} catch (VerificationException e) {
// We should get here.
}
}
@Test
public void testReceiveCoinbaseTransaction() throws Exception {
// Block 169482 (hash 0000000000000756935f1ee9d5987857b604046f846d3df56d024cdb5f368665)
// contains coinbase transactions that are mining pool shares.
// The private key MINERS_KEY is used to check transactions are received by a wallet correctly.
// The address for this private key is 1GqtGtn4fctXuKxsVzRPSLmYWN1YioLi9y.
final String MINING_PRIVATE_KEY = "5JDxPrBRghF1EvSBjDigywqfmAjpHPmTJxYtQTYJxJRHLLQA4mG";
final long BLOCK_NONCE = 3973947400L;
final Coin BALANCE_AFTER_BLOCK = Coin.valueOf(22223642);
final NetworkParameters PARAMS = MainNetParams.get();
Block block169482 =
PARAMS
.getDefaultSerializer()
.makeBlock(ByteStreams.toByteArray(getClass().getResourceAsStream("block169482.dat")));
// Check block.
assertNotNull(block169482);
block169482.verify(169482, EnumSet.noneOf(Block.VerifyFlag.class));
assertEquals(BLOCK_NONCE, block169482.getNonce());
StoredBlock storedBlock =
new StoredBlock(block169482, BigInteger.ONE, 169482); // Nonsense work - not used in test.
// Create a wallet contain the miner's key that receives a spend from a coinbase.
ECKey miningKey = DumpedPrivateKey.fromBase58(PARAMS, MINING_PRIVATE_KEY).getKey();
assertNotNull(miningKey);
Context context = new Context(PARAMS);
Wallet wallet = new Wallet(context);
wallet.importKey(miningKey);
// Initial balance should be zero by construction.
assertEquals(Coin.ZERO, wallet.getBalance());
// Give the wallet the first transaction in the block - this is the coinbase tx.
List<Transaction> transactions = block169482.getTransactions();
assertNotNull(transactions);
wallet.receiveFromBlock(transactions.get(0), storedBlock, NewBlockType.BEST_CHAIN, 0);
// Coinbase transaction should have been received successfully but be unavailable to spend (too
// young).
assertEquals(BALANCE_AFTER_BLOCK, wallet.getBalance(BalanceType.ESTIMATED));
assertEquals(Coin.ZERO, wallet.getBalance(BalanceType.AVAILABLE));
}
@SuppressWarnings("deprecation")
@Test
public void testDate() throws Exception {
Block block = params.getDefaultSerializer().makeBlock(blockBytes);
assertEquals("4 Nov 2010 16:06:04 GMT", block.getTime().toGMTString());
}