int getIndex() {
checkNotNull(parentTransaction, "This output is not attached to a parent transaction.");
for (int i = 0; i < parentTransaction.getOutputs().size(); i++) {
if (parentTransaction.getOutputs().get(i) == this) return i;
}
// Should never happen.
throw new RuntimeException("Output linked to wrong parent transaction?");
}
private WalletTransaction connectTransactionOutputs(
com.fuelcoinj.wallet.Protos.Transaction txProto) throws UnreadableWalletException {
Transaction tx = txMap.get(txProto.getHash());
final WalletTransaction.Pool pool;
switch (txProto.getPool()) {
case DEAD:
pool = WalletTransaction.Pool.DEAD;
break;
case PENDING:
pool = WalletTransaction.Pool.PENDING;
break;
case SPENT:
pool = WalletTransaction.Pool.SPENT;
break;
case UNSPENT:
pool = WalletTransaction.Pool.UNSPENT;
break;
// Upgrade old wallets: inactive pool has been merged with the pending pool.
// Remove this some time after 0.9 is old and everyone has upgraded.
// There should not be any spent outputs in this tx as old wallets would not allow them to
// be spent
// in this state.
case INACTIVE:
case PENDING_INACTIVE:
pool = WalletTransaction.Pool.PENDING;
break;
default:
throw new UnreadableWalletException("Unknown transaction pool: " + txProto.getPool());
}
for (int i = 0; i < tx.getOutputs().size(); i++) {
TransactionOutput output = tx.getOutputs().get(i);
final Protos.TransactionOutput transactionOutput = txProto.getTransactionOutput(i);
if (transactionOutput.hasSpentByTransactionHash()) {
final ByteString spentByTransactionHash = transactionOutput.getSpentByTransactionHash();
Transaction spendingTx = txMap.get(spentByTransactionHash);
if (spendingTx == null) {
throw new UnreadableWalletException(
String.format(
"Could not connect %s to %s",
tx.getHashAsString(), byteStringToHash(spentByTransactionHash)));
}
final int spendingIndex = transactionOutput.getSpentByTransactionIndex();
TransactionInput input = checkNotNull(spendingTx.getInput(spendingIndex));
input.connect(output);
}
}
if (txProto.hasConfidence()) {
Protos.TransactionConfidence confidenceProto = txProto.getConfidence();
TransactionConfidence confidence = tx.getConfidence();
readConfidence(tx, confidenceProto, confidence);
}
return new WalletTransaction(pool, tx);
}
@Test
public void testGetOpenTransactionOutputs() throws Exception {
final int UNDOABLE_BLOCKS_STORED = 10;
store = createStore(params, UNDOABLE_BLOCKS_STORED);
chain = new FullPrunedBlockChain(params, store);
// Check that we aren't accidentally leaving any references
// to the full StoredUndoableBlock's lying around (ie memory leaks)
ECKey outKey = new ECKey();
int height = 1;
// Build some blocks on genesis block to create a spendable output
Block rollingBlock =
params
.getGenesisBlock()
.createNextBlockWithCoinbase(Block.BLOCK_VERSION_GENESIS, outKey.getPubKey(), height++);
chain.add(rollingBlock);
Transaction transaction = rollingBlock.getTransactions().get(0);
TransactionOutPoint spendableOutput = new TransactionOutPoint(params, 0, transaction.getHash());
byte[] spendableOutputScriptPubKey = transaction.getOutputs().get(0).getScriptBytes();
for (int i = 1; i < params.getSpendableCoinbaseDepth(); i++) {
rollingBlock =
rollingBlock.createNextBlockWithCoinbase(
Block.BLOCK_VERSION_GENESIS, outKey.getPubKey(), height++);
chain.add(rollingBlock);
}
rollingBlock = rollingBlock.createNextBlock(null);
// Create bitcoin spend of 1 BTC.
ECKey toKey = new ECKey();
Coin amount = Coin.valueOf(100000000);
Address address = new Address(params, toKey.getPubKeyHash());
Coin totalAmount = Coin.ZERO;
Transaction t = new Transaction(params);
t.addOutput(new TransactionOutput(params, t, amount, toKey));
t.addSignedInput(spendableOutput, new Script(spendableOutputScriptPubKey), outKey);
rollingBlock.addTransaction(t);
rollingBlock.solve();
chain.add(rollingBlock);
totalAmount = totalAmount.add(amount);
List<UTXO> outputs = store.getOpenTransactionOutputs(Lists.newArrayList(address));
assertNotNull(outputs);
assertEquals("Wrong Number of Outputs", 1, outputs.size());
UTXO output = outputs.get(0);
assertEquals("The address is not equal", address.toString(), output.getAddress());
assertEquals("The amount is not equal", totalAmount, output.getValue());
outputs = null;
output = null;
try {
store.close();
} catch (Exception e) {
}
}
private WalletTransaction connectTransactionOutputs(
org.bitcoinj.wallet.Protos.Transaction txProto) {
Transaction tx = txMap.get(txProto.getHash());
WalletTransaction.Pool pool = WalletTransaction.Pool.valueOf(txProto.getPool().getNumber());
if (pool == WalletTransaction.Pool.INACTIVE
|| pool == WalletTransaction.Pool.PENDING_INACTIVE) {
// Upgrade old wallets: inactive pool has been merged with the pending pool.
// Remove this some time after 0.9 is old and everyone has upgraded.
// There should not be any spent outputs in this tx as old wallets would not allow them to be
// spent
// in this state.
pool = WalletTransaction.Pool.PENDING;
}
for (int i = 0; i < tx.getOutputs().size(); i++) {
TransactionOutput output = tx.getOutputs().get(i);
final Protos.TransactionOutput transactionOutput = txProto.getTransactionOutput(i);
if (transactionOutput.hasSpentByTransactionHash()) {
final ByteString spentByTransactionHash = transactionOutput.getSpentByTransactionHash();
Transaction spendingTx = txMap.get(spentByTransactionHash);
if (spendingTx == null)
throw new IllegalArgumentException(
String.format(
"Could not connect %s to %s",
tx.getHashAsString(), byteStringToHash(spentByTransactionHash)));
final int spendingIndex = transactionOutput.getSpentByTransactionIndex();
TransactionInput input = checkNotNull(spendingTx.getInput(spendingIndex));
input.connect(output);
}
}
if (txProto.hasConfidence()) {
Protos.TransactionConfidence confidenceProto = txProto.getConfidence();
TransactionConfidence confidence = tx.getConfidence();
readConfidence(tx, confidenceProto, confidence);
}
return new WalletTransaction(pool, tx);
}
/**
* Called when the client provides the refund transaction. The refund transaction must have one
* input from the multisig contract (that we don't have yet) and one output that the client
* creates to themselves. This object will later be modified when we start getting paid.
*
* @param refundTx The refund transaction, this object will be mutated when payment is
* incremented.
* @param clientMultiSigPubKey The client's pubkey which is required for the multisig output
* @return Our signature that makes the refund transaction valid
* @throws VerificationException If the transaction isnt valid or did not meet the requirements of
* a refund transaction.
*/
public synchronized byte[] provideRefundTransaction(
Transaction refundTx, byte[] clientMultiSigPubKey) throws VerificationException {
checkNotNull(refundTx);
checkNotNull(clientMultiSigPubKey);
checkState(state == State.WAITING_FOR_REFUND_TRANSACTION);
log.info("Provided with refund transaction: {}", refundTx);
// Do a few very basic syntax sanity checks.
refundTx.verify();
// Verify that the refund transaction has a single input (that we can fill to sign the multisig
// output).
if (refundTx.getInputs().size() != 1)
throw new VerificationException("Refund transaction does not have exactly one input");
// Verify that the refund transaction has a time lock on it and a sequence number of zero.
if (refundTx.getInput(0).getSequenceNumber() != 0)
throw new VerificationException("Refund transaction's input's sequence number is non-0");
if (refundTx.getLockTime() < minExpireTime)
throw new VerificationException("Refund transaction has a lock time too soon");
// Verify the transaction has one output (we don't care about its contents, its up to the
// client)
// Note that because we sign with SIGHASH_NONE|SIGHASH_ANYOENCANPAY the client can later add
// more outputs and
// inputs, but we will need only one output later to create the paying transactions
if (refundTx.getOutputs().size() != 1)
throw new VerificationException("Refund transaction does not have exactly one output");
refundTransactionUnlockTimeSecs = refundTx.getLockTime();
// Sign the refund tx with the scriptPubKey and return the signature. We don't have the spending
// transaction
// so do the steps individually.
clientKey = ECKey.fromPublicOnly(clientMultiSigPubKey);
Script multisigPubKey =
ScriptBuilder.createMultiSigOutputScript(2, ImmutableList.of(clientKey, serverKey));
// We are really only signing the fact that the transaction has a proper lock time and don't
// care about anything
// else, so we sign SIGHASH_NONE and SIGHASH_ANYONECANPAY.
TransactionSignature sig =
refundTx.calculateSignature(0, serverKey, multisigPubKey, Transaction.SigHash.NONE, true);
log.info("Signed refund transaction.");
this.clientOutput = refundTx.getOutput(0);
state = State.WAITING_FOR_MULTISIG_CONTRACT;
return sig.encodeToBitcoin();
}
/**
* Connects this input to the relevant output of the referenced transaction. Connecting means
* updating the internal pointers and spent flags. If the mode is to ABORT_ON_CONFLICT then the
* spent output won't be changed, but the outpoint.fromTx pointer will still be updated.
*
* @param transaction The transaction to try.
* @param mode Whether to abort if there's a pre-existing connection or not.
* @return NO_SUCH_TX if transaction is not the prevtx, ALREADY_SPENT if there was a conflict,
* SUCCESS if not.
*/
public ConnectionResult connect(Transaction transaction, ConnectMode mode) {
if (!transaction.getHash().equals(outpoint.getHash())) return ConnectionResult.NO_SUCH_TX;
checkElementIndex(
(int) outpoint.getIndex(), transaction.getOutputs().size(), "Corrupt transaction");
TransactionOutput out = transaction.getOutput((int) outpoint.getIndex());
if (!out.isAvailableForSpending()) {
if (getParentTransaction().equals(outpoint.fromTx)) {
// Already connected.
return ConnectionResult.SUCCESS;
} else if (mode == ConnectMode.DISCONNECT_ON_CONFLICT) {
out.markAsUnspent();
} else if (mode == ConnectMode.ABORT_ON_CONFLICT) {
outpoint.fromTx = out.getParentTransaction();
return TransactionInput.ConnectionResult.ALREADY_SPENT;
}
}
connect(out);
return TransactionInput.ConnectionResult.SUCCESS;
}
@Override
/** Used during reorgs to connect a block previously on a fork */
protected synchronized TransactionOutputChanges connectTransactions(StoredBlock newBlock)
throws VerificationException, BlockStoreException, PrunedException {
checkState(lock.isHeldByCurrentThread());
if (!params.passesCheckpoint(newBlock.getHeight(), newBlock.getHeader().getHash()))
throw new VerificationException("Block failed checkpoint lockin at " + newBlock.getHeight());
blockStore.beginDatabaseBatchWrite();
StoredUndoableBlock block = blockStore.getUndoBlock(newBlock.getHeader().getHash());
if (block == null) {
// We're trying to re-org too deep and the data needed has been deleted.
blockStore.abortDatabaseBatchWrite();
throw new PrunedException(newBlock.getHeader().getHash());
}
TransactionOutputChanges txOutChanges;
try {
List<Transaction> transactions = block.getTransactions();
if (transactions != null) {
LinkedList<StoredTransactionOutput> txOutsSpent = new LinkedList<StoredTransactionOutput>();
LinkedList<StoredTransactionOutput> txOutsCreated =
new LinkedList<StoredTransactionOutput>();
long sigOps = 0;
final boolean enforcePayToScriptHash =
newBlock.getHeader().getTimeSeconds() >= NetworkParameters.BIP16_ENFORCE_TIME;
if (!params.isCheckpoint(newBlock.getHeight())) {
for (Transaction tx : transactions) {
Sha256Hash hash = tx.getHash();
if (blockStore.hasUnspentOutputs(hash, tx.getOutputs().size()))
throw new VerificationException("Block failed BIP30 test!");
}
}
Coin totalFees = Coin.ZERO;
Coin coinbaseValue = null;
if (scriptVerificationExecutor.isShutdown())
scriptVerificationExecutor =
Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
List<Future<VerificationException>> listScriptVerificationResults =
new ArrayList<Future<VerificationException>>(transactions.size());
for (final Transaction tx : transactions) {
boolean isCoinBase = tx.isCoinBase();
Coin valueIn = Coin.ZERO;
Coin valueOut = Coin.ZERO;
final List<Script> prevOutScripts = new LinkedList<Script>();
if (!isCoinBase) {
for (int index = 0; index < tx.getInputs().size(); index++) {
final TransactionInput in = tx.getInputs().get(index);
final StoredTransactionOutput prevOut =
blockStore.getTransactionOutput(
in.getOutpoint().getHash(), in.getOutpoint().getIndex());
if (prevOut == null)
throw new VerificationException(
"Attempted spend of a non-existent or already spent output!");
if (newBlock.getHeight() - prevOut.getHeight() < params.getSpendableCoinbaseDepth())
throw new VerificationException(
"Tried to spend coinbase at depth "
+ (newBlock.getHeight() - prevOut.getHeight()));
valueIn = valueIn.add(prevOut.getValue());
if (enforcePayToScriptHash) {
Script script = new Script(prevOut.getScriptBytes());
if (script.isPayToScriptHash())
sigOps += Script.getP2SHSigOpCount(in.getScriptBytes());
if (sigOps > Block.MAX_BLOCK_SIGOPS)
throw new VerificationException("Too many P2SH SigOps in block");
}
prevOutScripts.add(new Script(prevOut.getScriptBytes()));
blockStore.removeUnspentTransactionOutput(prevOut);
txOutsSpent.add(prevOut);
}
}
Sha256Hash hash = tx.getHash();
for (TransactionOutput out : tx.getOutputs()) {
valueOut = valueOut.add(out.getValue());
StoredTransactionOutput newOut =
new StoredTransactionOutput(
hash,
out.getIndex(),
out.getValue(),
newBlock.getHeight(),
isCoinBase,
out.getScriptBytes());
blockStore.addUnspentTransactionOutput(newOut);
txOutsCreated.add(newOut);
}
// All values were already checked for being non-negative (as it is verified in
// Transaction.verify())
// but we check again here just for defence in depth. Transactions with zero output value
// are OK.
if (valueOut.signum() < 0 || valueOut.compareTo(NetworkParameters.MAX_MONEY) > 0)
throw new VerificationException("Transaction output value out of range");
if (isCoinBase) {
coinbaseValue = valueOut;
} else {
if (valueIn.compareTo(valueOut) < 0
|| valueIn.compareTo(NetworkParameters.MAX_MONEY) > 0)
throw new VerificationException("Transaction input value out of range");
totalFees = totalFees.add(valueIn.subtract(valueOut));
}
if (!isCoinBase) {
// Because correctlySpends modifies transactions, this must come after we are done with
// tx
FutureTask<VerificationException> future =
new FutureTask<VerificationException>(
new Verifier(tx, prevOutScripts, enforcePayToScriptHash));
scriptVerificationExecutor.execute(future);
listScriptVerificationResults.add(future);
}
}
if (totalFees.compareTo(NetworkParameters.MAX_MONEY) > 0
|| newBlock
.getHeader()
.getBlockInflation(newBlock.getHeight())
.add(totalFees)
.compareTo(coinbaseValue)
< 0) throw new VerificationException("Transaction fees out of range");
txOutChanges = new TransactionOutputChanges(txOutsCreated, txOutsSpent);
for (Future<VerificationException> future : listScriptVerificationResults) {
VerificationException e;
try {
e = future.get();
} catch (InterruptedException thrownE) {
throw new RuntimeException(thrownE); // Shouldn't happen
} catch (ExecutionException thrownE) {
log.error("Script.correctlySpends threw a non-normal exception: " + thrownE.getCause());
throw new VerificationException(
"Bug in Script.correctlySpends, likely script malformed in some new and interesting way.",
thrownE);
}
if (e != null) throw e;
}
} else {
txOutChanges = block.getTxOutChanges();
if (!params.isCheckpoint(newBlock.getHeight()))
for (StoredTransactionOutput out : txOutChanges.txOutsCreated) {
Sha256Hash hash = out.getHash();
if (blockStore.getTransactionOutput(hash, out.getIndex()) != null)
throw new VerificationException("Block failed BIP30 test!");
}
for (StoredTransactionOutput out : txOutChanges.txOutsCreated)
blockStore.addUnspentTransactionOutput(out);
for (StoredTransactionOutput out : txOutChanges.txOutsSpent)
blockStore.removeUnspentTransactionOutput(out);
}
} catch (VerificationException e) {
scriptVerificationExecutor.shutdownNow();
blockStore.abortDatabaseBatchWrite();
throw e;
} catch (BlockStoreException e) {
scriptVerificationExecutor.shutdownNow();
blockStore.abortDatabaseBatchWrite();
throw e;
}
return txOutChanges;
}
@Override
protected TransactionOutputChanges connectTransactions(int height, Block block)
throws VerificationException, BlockStoreException {
checkState(lock.isHeldByCurrentThread());
if (block.transactions == null)
throw new RuntimeException(
"connectTransactions called with Block that didn't have transactions!");
if (!params.passesCheckpoint(height, block.getHash()))
throw new VerificationException("Block failed checkpoint lockin at " + height);
blockStore.beginDatabaseBatchWrite();
LinkedList<StoredTransactionOutput> txOutsSpent = new LinkedList<StoredTransactionOutput>();
LinkedList<StoredTransactionOutput> txOutsCreated = new LinkedList<StoredTransactionOutput>();
long sigOps = 0;
final boolean enforcePayToScriptHash =
block.getTimeSeconds() >= NetworkParameters.BIP16_ENFORCE_TIME;
if (scriptVerificationExecutor.isShutdown())
scriptVerificationExecutor =
Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
List<Future<VerificationException>> listScriptVerificationResults =
new ArrayList<Future<VerificationException>>(block.transactions.size());
try {
if (!params.isCheckpoint(height)) {
// BIP30 violator blocks are ones that contain a duplicated transaction. They are all in the
// checkpoints list and we therefore only check non-checkpoints for duplicated transactions
// here. See the
// BIP30 document for more details on this:
// https://github.com/bitcoin/bips/blob/master/bip-0030.mediawiki
for (Transaction tx : block.transactions) {
Sha256Hash hash = tx.getHash();
// If we already have unspent outputs for this hash, we saw the tx already. Either the
// block is
// being added twice (bug) or the block is a BIP30 violator.
if (blockStore.hasUnspentOutputs(hash, tx.getOutputs().size()))
throw new VerificationException("Block failed BIP30 test!");
if (enforcePayToScriptHash) // We already check non-BIP16 sigops in
// Block.verifyTransactions(true)
sigOps += tx.getSigOpCount();
}
}
Coin totalFees = Coin.ZERO;
Coin coinbaseValue = null;
for (final Transaction tx : block.transactions) {
boolean isCoinBase = tx.isCoinBase();
Coin valueIn = Coin.ZERO;
Coin valueOut = Coin.ZERO;
final List<Script> prevOutScripts = new LinkedList<Script>();
if (!isCoinBase) {
// For each input of the transaction remove the corresponding output from the set of
// unspent
// outputs.
for (int index = 0; index < tx.getInputs().size(); index++) {
TransactionInput in = tx.getInputs().get(index);
StoredTransactionOutput prevOut =
blockStore.getTransactionOutput(
in.getOutpoint().getHash(), in.getOutpoint().getIndex());
if (prevOut == null)
throw new VerificationException(
"Attempted to spend a non-existent or already spent output!");
// Coinbases can't be spent until they mature, to avoid re-orgs destroying entire
// transaction
// chains. The assumption is there will ~never be re-orgs deeper than the spendable
// coinbase
// chain depth.
if (height - prevOut.getHeight() < params.getSpendableCoinbaseDepth())
throw new VerificationException(
"Tried to spend coinbase at depth " + (height - prevOut.getHeight()));
// TODO: Check we're not spending the genesis transaction here. Satoshis code won't
// allow it.
valueIn = valueIn.add(prevOut.getValue());
if (enforcePayToScriptHash) {
if (new Script(prevOut.getScriptBytes()).isPayToScriptHash())
sigOps += Script.getP2SHSigOpCount(in.getScriptBytes());
if (sigOps > Block.MAX_BLOCK_SIGOPS)
throw new VerificationException("Too many P2SH SigOps in block");
}
prevOutScripts.add(new Script(prevOut.getScriptBytes()));
// in.getScriptSig().correctlySpends(tx, index, new Script(params,
// prevOut.getScriptBytes(), 0, prevOut.getScriptBytes().length));
blockStore.removeUnspentTransactionOutput(prevOut);
txOutsSpent.add(prevOut);
}
}
Sha256Hash hash = tx.getHash();
for (TransactionOutput out : tx.getOutputs()) {
valueOut = valueOut.add(out.getValue());
// For each output, add it to the set of unspent outputs so it can be consumed in future.
StoredTransactionOutput newOut =
new StoredTransactionOutput(
hash, out.getIndex(), out.getValue(), height, isCoinBase, out.getScriptBytes());
blockStore.addUnspentTransactionOutput(newOut);
txOutsCreated.add(newOut);
}
// All values were already checked for being non-negative (as it is verified in
// Transaction.verify())
// but we check again here just for defence in depth. Transactions with zero output value
// are OK.
if (valueOut.signum() < 0 || valueOut.compareTo(NetworkParameters.MAX_MONEY) > 0)
throw new VerificationException("Transaction output value out of range");
if (isCoinBase) {
coinbaseValue = valueOut;
} else {
if (valueIn.compareTo(valueOut) < 0 || valueIn.compareTo(NetworkParameters.MAX_MONEY) > 0)
throw new VerificationException("Transaction input value out of range");
totalFees = totalFees.add(valueIn.subtract(valueOut));
}
if (!isCoinBase && runScripts) {
// Because correctlySpends modifies transactions, this must come after we are done with tx
FutureTask<VerificationException> future =
new FutureTask<VerificationException>(
new Verifier(tx, prevOutScripts, enforcePayToScriptHash));
scriptVerificationExecutor.execute(future);
listScriptVerificationResults.add(future);
}
}
if (totalFees.compareTo(NetworkParameters.MAX_MONEY) > 0
|| block.getBlockInflation(height).add(totalFees).compareTo(coinbaseValue) < 0)
throw new VerificationException("Transaction fees out of range");
for (Future<VerificationException> future : listScriptVerificationResults) {
VerificationException e;
try {
e = future.get();
} catch (InterruptedException thrownE) {
throw new RuntimeException(thrownE); // Shouldn't happen
} catch (ExecutionException thrownE) {
log.error("Script.correctlySpends threw a non-normal exception: " + thrownE.getCause());
throw new VerificationException(
"Bug in Script.correctlySpends, likely script malformed in some new and interesting way.",
thrownE);
}
if (e != null) throw e;
}
} catch (VerificationException e) {
scriptVerificationExecutor.shutdownNow();
blockStore.abortDatabaseBatchWrite();
throw e;
} catch (BlockStoreException e) {
scriptVerificationExecutor.shutdownNow();
blockStore.abortDatabaseBatchWrite();
throw e;
}
return new TransactionOutputChanges(txOutsCreated, txOutsSpent);
}
/**
* This is required for signatures which use a sigHashType which cannot be represented using
* SigHash and anyoneCanPay See transaction
* c99c49da4c38af669dea436d3e73780dfdb6c1ecf9958baa52960e8baee30e73, which has sigHashType 0
*/
public static synchronized byte[] serializeForSignature(
Transaction spendingTx, int inputIndex, byte[] connectedScript, byte sigHashType) {
NetworkParameters params = TestNet3Params.get();
// The SIGHASH flags are used in the design of contracts, please see this page for a further
// understanding of
// the purposes of the code in this method:
//
// https://en.bitcoin.it/wiki/Contracts
try {
Transaction tx = new Transaction(params, spendingTx.bitcoinSerialize());
// Store all the input scripts and clear them in preparation for signing. If we're signing a
// fresh
// transaction that step isn't very helpful, but it doesn't add much cost relative to the
// actual
// EC math so we'll do it anyway.
//
// Also store the input sequence numbers in case we are clearing them with SigHash.NONE/SINGLE
byte[][] inputScripts = new byte[tx.getInputs().size()][];
long[] inputSequenceNumbers = new long[tx.getInputs().size()];
for (int i = 0; i < tx.getInputs().size(); i++) {
inputScripts[i] = tx.getInputs().get(i).getScriptBytes();
inputSequenceNumbers[i] = tx.getInputs().get(i).getSequenceNumber();
tx.getInput(i).setScriptSig(new Script(new byte[0]));
}
// This step has no purpose beyond being synchronized with the reference clients bugs.
// OP_CODESEPARATOR
// is a legacy holdover from a previous, broken design of executing scripts that shipped in
// Bitcoin 0.1.
// It was seriously flawed and would have let anyone take anyone elses money. Later versions
// switched to
// the design we use today where scripts are executed independently but share a stack. This
// left the
// OP_CODESEPARATOR instruction having no purpose as it was only meant to be used internally,
// not actually
// ever put into scripts. Deleting OP_CODESEPARATOR is a step that should never be required
// but if we don't
// do it, we could split off the main chain.
connectedScript =
Script.removeAllInstancesOfOp(connectedScript, ScriptOpCodes.OP_CODESEPARATOR);
// Set the input to the script of its output. Satoshi does this but the step has no obvious
// purpose as
// the signature covers the hash of the prevout transaction which obviously includes the
// output script
// already. Perhaps it felt safer to him in some way, or is another leftover from how the code
// was written.
TransactionInput input = tx.getInputs().get(inputIndex);
input.setScriptSig(new Script(connectedScript));
List<TransactionOutput> outputs = tx.getOutputs();
if ((sigHashType & 0x1f) == (Transaction.SigHash.NONE.ordinal() + 1)) {
// SIGHASH_NONE means no outputs are signed at all - the signature is effectively for a
// "blank cheque".
// this.outputs = new ArrayList<TransactionOutput>(0);
tx.clearOutputs();
// The signature isn't broken by new versions of the transaction issued by other parties.
for (int i = 0; i < tx.getInputs().size(); i++)
if (i != inputIndex) tx.getInputs().get(i).setSequenceNumber(0);
} else if ((sigHashType & 0x1f) == (Transaction.SigHash.SINGLE.ordinal() + 1)) {
// SIGHASH_SINGLE means only sign the output at the same index as the input (ie, my output).
if (inputIndex >= tx.getOutputs().size()) {
// The input index is beyond the number of outputs, it's a buggy signature made by a
// broken
// Bitcoin implementation. The reference client also contains a bug in handling this case:
// any transaction output that is signed in this case will result in both the signed
// output
// and any future outputs to this public key being steal-able by anyone who has
// the resulting signature and the public key (both of which are part of the signed tx
// input).
// Put the transaction back to how we found it.
//
// TODO: Only allow this to happen if we are checking a signature, not signing a
// transactions
for (int i = 0; i < tx.getInputs().size(); i++) {
// tx.getInputs().get(i).setScriptSig(inputScripts[i]);
/* tx.getInputs().get(i).setScriptSig(ScriptBuilder.createMultiSigInputScriptBytes(
Arrays.asList(inputScripts[i])));*/
tx.getInput(i).setScriptSig(new Script(inputScripts[i]));
tx.getInputs().get(i).setSequenceNumber(inputSequenceNumbers[i]);
}
// this.outputs = outputs;
// Satoshis bug is that SignatureHash was supposed to return a hash and on this codepath
// it
// actually returns the constant "1" to indicate an error, which is never checked for.
// Oops.
return Utils.HEX.decode(
"0100000000000000000000000000000000000000000000000000000000000000");
}
// In SIGHASH_SINGLE the outputs after the matching input index are deleted, and the outputs
// before
// that position are "nulled out". Unintuitively, the value in a "null" transaction is set
// to -1.
/* this.outputs = new ArrayList<TransactionOutput>(this.outputs.subList(0, inputIndex + 1));
for (int i = 0; i < inputIndex; i++)
this.outputs.set(i, new TransactionOutput(params, this, Coin.NEGATIVE_SATOSHI, new byte[] {}));
// The signature isn't broken by new versions of the transaction issued by other parties.
for (int i = 0; i < inputs.size(); i++)
if (i != inputIndex)
inputs.get(i).setSequenceNumber(0);*/
// In SIGHASH_SINGLE the outputs after the matching input index are deleted, and the outputs
// before
// that position are "nulled out". Unintuitively, the value in a "null" transaction is set
// to -1.
// tx.outputs = new ArrayList<TransactionOutput>(tx.getOutputs().subList(0, inputIndex +
// 1));
tx.clearOutputs();
for (int i = 0; i <= inputIndex; i++)
if (i == inputIndex) {
// need to make sure the output at inputIndex stays the same
tx.addOutput(spendingTx.getOutput(inputIndex));
} else {
// this.outputs.set(i, new TransactionOutput(params, this, Coin.NEGATIVE_SATOSHI, new
// byte[] {}));
tx.addOutput(new TransactionOutput(params, tx, Coin.NEGATIVE_SATOSHI, new byte[] {}));
}
// The signature isn't broken by new versions of the transaction issued by other parties.
for (int i = 0; i < tx.getInputs().size(); i++)
if (i != inputIndex) tx.getInputs().get(i).setSequenceNumber(0);
}
List<TransactionInput> inputs = tx.getInputs();
if ((sigHashType & (byte) 0x80) == 0x80) {
// SIGHASH_ANYONECANPAY means the signature in the input is not broken by
// changes/additions/removals
// of other inputs. For example, this is useful for building assurance contracts.
tx.clearInputs();
tx.getInputs().add(input);
}
ByteArrayOutputStream bos = new UnsafeByteArrayOutputStream(256);
tx.bitcoinSerialize(bos);
// We also have to write a hash type (sigHashType is actually an unsigned char)
uint32ToByteStreamLE(0x000000ff & sigHashType, bos);
// Note that this is NOT reversed to ensure it will be signed correctly. If it were to be
// printed out
// however then we would expect that it is IS reversed.
byte[] txSignatureBytes = bos.toByteArray();
bos.close();
// Put the transaction back to how we found it.
// tx.inputs = inputs;
tx.clearInputs();
for (int i = 0; i < inputs.size(); i++) {
tx.addInput(inputs.get(i));
}
for (int i = 0; i < inputs.size(); i++) {
inputs.get(i).setScriptSig(new Script(inputScripts[i]));
inputs.get(i).setSequenceNumber(inputSequenceNumbers[i]);
}
// this.outputs = outputs;
tx.clearOutputs();
for (int i = 0; i < outputs.size(); i++) {
tx.addOutput(outputs.get(i));
}
return txSignatureBytes;
} catch (IOException e) {
throw new RuntimeException(e); // Cannot happen.
}
}
private static Protos.Transaction makeTxProto(WalletTransaction wtx) {
Transaction tx = wtx.getTransaction();
Protos.Transaction.Builder txBuilder = Protos.Transaction.newBuilder();
txBuilder
.setPool(getProtoPool(wtx))
.setHash(hashToByteString(tx.getHash()))
.setVersion((int) tx.getVersion())
.setTime(tx.getTime());
if (tx.getUpdateTime() != null) {
txBuilder.setUpdatedAt(tx.getUpdateTime().getTime());
}
if (tx.getLockTime() > 0) {
txBuilder.setLockTime((int) tx.getLockTime());
}
// Handle inputs.
for (TransactionInput input : tx.getInputs()) {
Protos.TransactionInput.Builder inputBuilder =
Protos.TransactionInput.newBuilder()
.setScriptBytes(ByteString.copyFrom(input.getScriptBytes()))
.setTransactionOutPointHash(hashToByteString(input.getOutpoint().getHash()))
.setTransactionOutPointIndex((int) input.getOutpoint().getIndex());
if (input.hasSequence()) inputBuilder.setSequence((int) input.getSequenceNumber());
if (input.getValue() != null) inputBuilder.setValue(input.getValue().value);
txBuilder.addTransactionInput(inputBuilder);
}
// Handle outputs.
for (TransactionOutput output : tx.getOutputs()) {
Protos.TransactionOutput.Builder outputBuilder =
Protos.TransactionOutput.newBuilder()
.setScriptBytes(ByteString.copyFrom(output.getScriptBytes()))
.setValue(output.getValue().value);
final TransactionInput spentBy = output.getSpentBy();
if (spentBy != null) {
Sha256Hash spendingHash = spentBy.getParentTransaction().getHash();
int spentByTransactionIndex = spentBy.getParentTransaction().getInputs().indexOf(spentBy);
outputBuilder
.setSpentByTransactionHash(hashToByteString(spendingHash))
.setSpentByTransactionIndex(spentByTransactionIndex);
}
txBuilder.addTransactionOutput(outputBuilder);
}
// Handle which blocks tx was seen in.
final Map<Sha256Hash, Integer> appearsInHashes = tx.getAppearsInHashes();
if (appearsInHashes != null) {
for (Map.Entry<Sha256Hash, Integer> entry : appearsInHashes.entrySet()) {
txBuilder.addBlockHash(hashToByteString(entry.getKey()));
txBuilder.addBlockRelativityOffsets(entry.getValue());
}
}
if (tx.hasConfidence()) {
TransactionConfidence confidence = tx.getConfidence();
Protos.TransactionConfidence.Builder confidenceBuilder =
Protos.TransactionConfidence.newBuilder();
writeConfidence(txBuilder, confidence, confidenceBuilder);
}
Protos.Transaction.Purpose purpose;
switch (tx.getPurpose()) {
case UNKNOWN:
purpose = Protos.Transaction.Purpose.UNKNOWN;
break;
case USER_PAYMENT:
purpose = Protos.Transaction.Purpose.USER_PAYMENT;
break;
case KEY_ROTATION:
purpose = Protos.Transaction.Purpose.KEY_ROTATION;
break;
case ASSURANCE_CONTRACT_CLAIM:
purpose = Protos.Transaction.Purpose.ASSURANCE_CONTRACT_CLAIM;
break;
case ASSURANCE_CONTRACT_PLEDGE:
purpose = Protos.Transaction.Purpose.ASSURANCE_CONTRACT_PLEDGE;
break;
case ASSURANCE_CONTRACT_STUB:
purpose = Protos.Transaction.Purpose.ASSURANCE_CONTRACT_STUB;
break;
default:
throw new RuntimeException("New tx purpose serialization not implemented.");
}
txBuilder.setPurpose(purpose);
ExchangeRate exchangeRate = tx.getExchangeRate();
if (exchangeRate != null) {
Protos.ExchangeRate.Builder exchangeRateBuilder =
Protos.ExchangeRate.newBuilder()
.setCoinValue(exchangeRate.coin.value)
.setFiatValue(exchangeRate.fiat.value)
.setFiatCurrencyCode(exchangeRate.fiat.currencyCode);
txBuilder.setExchangeRate(exchangeRateBuilder);
}
if (tx.getMemo() != null) txBuilder.setMemo(tx.getMemo());
return txBuilder.build();
}
@Test
public void testUTXOProviderWithWallet() throws Exception {
final int UNDOABLE_BLOCKS_STORED = 10;
store = createStore(params, UNDOABLE_BLOCKS_STORED);
chain = new FullPrunedBlockChain(params, store);
// Check that we aren't accidentally leaving any references
// to the full StoredUndoableBlock's lying around (ie memory leaks)
ECKey outKey = new ECKey();
int height = 1;
// Build some blocks on genesis block to create a spendable output.
Block rollingBlock =
params
.getGenesisBlock()
.createNextBlockWithCoinbase(Block.BLOCK_VERSION_GENESIS, outKey.getPubKey(), height++);
chain.add(rollingBlock);
Transaction transaction = rollingBlock.getTransactions().get(0);
TransactionOutPoint spendableOutput = new TransactionOutPoint(params, 0, transaction.getHash());
byte[] spendableOutputScriptPubKey = transaction.getOutputs().get(0).getScriptBytes();
for (int i = 1; i < params.getSpendableCoinbaseDepth(); i++) {
rollingBlock =
rollingBlock.createNextBlockWithCoinbase(
Block.BLOCK_VERSION_GENESIS, outKey.getPubKey(), height++);
chain.add(rollingBlock);
}
rollingBlock = rollingBlock.createNextBlock(null);
// Create 1 BTC spend to a key in this wallet (to ourselves).
Wallet wallet = new Wallet(params);
assertEquals(
"Available balance is incorrect",
Coin.ZERO,
wallet.getBalance(Wallet.BalanceType.AVAILABLE));
assertEquals(
"Estimated balance is incorrect",
Coin.ZERO,
wallet.getBalance(Wallet.BalanceType.ESTIMATED));
wallet.setUTXOProvider(store);
ECKey toKey = wallet.freshReceiveKey();
Coin amount = Coin.valueOf(100000000);
Transaction t = new Transaction(params);
t.addOutput(new TransactionOutput(params, t, amount, toKey));
t.addSignedInput(spendableOutput, new Script(spendableOutputScriptPubKey), outKey);
rollingBlock.addTransaction(t);
rollingBlock.solve();
chain.add(rollingBlock);
// Create another spend of 1/2 the value of BTC we have available using the wallet (store coin
// selector).
ECKey toKey2 = new ECKey();
Coin amount2 = amount.divide(2);
Address address2 = new Address(params, toKey2.getPubKeyHash());
Wallet.SendRequest req = Wallet.SendRequest.to(address2, amount2);
wallet.completeTx(req);
wallet.commitTx(req.tx);
Coin fee = req.fee;
// There should be one pending tx (our spend).
assertEquals(
"Wrong number of PENDING.4", 1, wallet.getPoolSize(WalletTransaction.Pool.PENDING));
Coin totalPendingTxAmount = Coin.ZERO;
for (Transaction tx : wallet.getPendingTransactions()) {
totalPendingTxAmount = totalPendingTxAmount.add(tx.getValueSentToMe(wallet));
}
// The availbale balance should be the 0 (as we spent the 1 BTC that's pending) and estimated
// should be 1/2 - fee BTC
assertEquals(
"Available balance is incorrect",
Coin.ZERO,
wallet.getBalance(Wallet.BalanceType.AVAILABLE));
assertEquals(
"Estimated balance is incorrect",
amount2.subtract(fee),
wallet.getBalance(Wallet.BalanceType.ESTIMATED));
assertEquals("Pending tx amount is incorrect", amount2.subtract(fee), totalPendingTxAmount);
try {
store.close();
} catch (Exception e) {
}
}
@Override
/** Used during reorgs to connect a block previously on a fork */
protected synchronized TransactionOutputChanges connectTransactions(StoredBlock newBlock)
throws VerificationException, BlockStoreException, PrunedException {
checkState(lock.isLocked());
if (!params.passesCheckpoint(newBlock.getHeight(), newBlock.getHeader().getHash()))
throw new VerificationException("Block failed checkpoint lockin at " + newBlock.getHeight());
blockStore.beginDatabaseBatchWrite();
StoredUndoableBlock block = blockStore.getUndoBlock(newBlock.getHeader().getHash());
if (block == null) {
// We're trying to re-org too deep and the data needed has been deleted.
blockStore.abortDatabaseBatchWrite();
throw new PrunedException(newBlock.getHeader().getHash());
}
TransactionOutputChanges txOutChanges;
try {
List<Transaction> transactions = block.getTransactions();
if (transactions != null) {
LinkedList<StoredTransactionOutput> txOutsSpent = new LinkedList<StoredTransactionOutput>();
LinkedList<StoredTransactionOutput> txOutsCreated =
new LinkedList<StoredTransactionOutput>();
long sigOps = 0;
final boolean enforcePayToScriptHash =
newBlock.getHeader().getTimeSeconds() >= NetworkParameters.BIP16_ENFORCE_TIME;
if (!params.isCheckpoint(newBlock.getHeight())) {
for (Transaction tx : transactions) {
Sha256Hash hash = tx.getHash();
if (blockStore.hasUnspentOutputs(hash, tx.getOutputs().size()))
throw new VerificationException("Block failed BIP30 test!");
}
}
BigInteger totalFees = BigInteger.ZERO;
BigInteger coinbaseValue = null;
if (scriptVerificationExecutor.isShutdown())
scriptVerificationExecutor =
Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
List<Future<VerificationException>> listScriptVerificationResults =
new ArrayList<Future<VerificationException>>(transactions.size());
for (final Transaction tx : transactions) {
boolean isCoinBase = tx.isCoinBase();
BigInteger valueIn = BigInteger.ZERO;
BigInteger valueOut = BigInteger.ZERO;
if (!isCoinBase) {
for (int index = 0; index < tx.getInputs().size(); index++) {
final TransactionInput in = tx.getInputs().get(index);
final StoredTransactionOutput prevOut =
blockStore.getTransactionOutput(
in.getOutpoint().getHash(), in.getOutpoint().getIndex());
if (prevOut == null)
throw new VerificationException(
"Attempted spend of a non-existent or already spent output!");
if (newBlock.getHeight() - prevOut.getHeight() < params.getSpendableCoinbaseDepth())
throw new VerificationException(
"Tried to spend coinbase at depth "
+ (newBlock.getHeight() - prevOut.getHeight()));
valueIn = valueIn.add(prevOut.getValue());
if (enforcePayToScriptHash) {
Script script =
new Script(
params, prevOut.getScriptBytes(), 0, prevOut.getScriptBytes().length);
if (script.isPayToScriptHash())
sigOps += Script.getP2SHSigOpCount(in.getScriptBytes());
if (sigOps > Block.MAX_BLOCK_SIGOPS)
throw new VerificationException("Too many P2SH SigOps in block");
}
// All of these copies are terribly ugly, however without them,
// I see some odd concurrency issues where scripts throw exceptions
// (mostly "Attempted OP_* on empty stack" or similar) when they shouldn't.
// In my tests, total time spent in net.usecredits.credits.core when
// downloading the chain is < 0.5%, so doing this is no big efficiency issue.
// TODO: Find out the underlying issue and create a better work-around
// TODO: Thoroughly test that this fixes the issue like the non-StoredBlock version
// does
final int currentIndex = index;
final Script scriptSig = in.getScriptSig();
final Script scriptPubKey =
new Script(params, prevOut.getScriptBytes(), 0, prevOut.getScriptBytes().length);
FutureTask<VerificationException> future =
new FutureTask<VerificationException>(
new Callable<VerificationException>() {
public VerificationException call() {
try {
scriptSig.correctlySpends(
tx, currentIndex, scriptPubKey, enforcePayToScriptHash);
} catch (VerificationException e) {
return e;
}
return null;
}
});
scriptVerificationExecutor.execute(future);
listScriptVerificationResults.add(future);
blockStore.removeUnspentTransactionOutput(prevOut);
txOutsSpent.add(prevOut);
}
}
Sha256Hash hash = tx.getHash();
for (TransactionOutput out : tx.getOutputs()) {
valueOut = valueOut.add(out.getValue());
StoredTransactionOutput newOut =
new StoredTransactionOutput(
hash,
out.getIndex(),
out.getValue(),
newBlock.getHeight(),
isCoinBase,
out.getScriptBytes());
blockStore.addUnspentTransactionOutput(newOut);
txOutsCreated.add(newOut);
}
// All values were already checked for being non-negative (as it is verified in
// Transaction.verify())
// but we check again here just for defence in depth. Transactions with zero output value
// are OK.
if (valueOut.compareTo(BigInteger.ZERO) < 0 || valueOut.compareTo(params.MAX_MONEY) > 0)
throw new VerificationException("Transaction output value out of rage");
if (isCoinBase) {
coinbaseValue = valueOut;
} else {
if (valueIn.compareTo(valueOut) < 0 || valueIn.compareTo(params.MAX_MONEY) > 0)
throw new VerificationException("Transaction input value out of range");
totalFees = totalFees.add(valueIn.subtract(valueOut));
}
}
if (totalFees.compareTo(params.MAX_MONEY) > 0
|| newBlock
.getHeader()
.getBlockInflation(newBlock.getHeight())
.add(totalFees)
.compareTo(coinbaseValue)
< 0) throw new VerificationException("Transaction fees out of range");
txOutChanges = new TransactionOutputChanges(txOutsCreated, txOutsSpent);
for (Future<VerificationException> future : listScriptVerificationResults) {
VerificationException e;
try {
e = future.get();
} catch (InterruptedException thrownE) {
throw new RuntimeException(thrownE); // Shouldn't happen
} catch (ExecutionException thrownE) {
log.error("Script.correctlySpends threw a non-normal exception: " + thrownE.getCause());
throw new VerificationException(
"Bug in Script.correctlySpends, likely script malformed in some new and interesting way.");
}
if (e != null) throw e;
}
} else {
txOutChanges = block.getTxOutChanges();
if (!params.isCheckpoint(newBlock.getHeight()))
for (StoredTransactionOutput out : txOutChanges.txOutsCreated) {
Sha256Hash hash = out.getHash();
if (blockStore.getTransactionOutput(hash, out.getIndex()) != null)
throw new VerificationException("Block failed BIP30 test!");
}
for (StoredTransactionOutput out : txOutChanges.txOutsCreated)
blockStore.addUnspentTransactionOutput(out);
for (StoredTransactionOutput out : txOutChanges.txOutsSpent)
blockStore.removeUnspentTransactionOutput(out);
}
} catch (VerificationException e) {
scriptVerificationExecutor.shutdownNow();
blockStore.abortDatabaseBatchWrite();
throw e;
} catch (BlockStoreException e) {
scriptVerificationExecutor.shutdownNow();
blockStore.abortDatabaseBatchWrite();
throw e;
}
return txOutChanges;
}
@Override
protected TransactionOutputChanges connectTransactions(int height, Block block)
throws VerificationException, BlockStoreException {
checkState(lock.isLocked());
if (block.transactions == null)
throw new RuntimeException(
"connectTransactions called with Block that didn't have transactions!");
if (!params.passesCheckpoint(height, block.getHash()))
throw new VerificationException("Block failed checkpoint lockin at " + height);
blockStore.beginDatabaseBatchWrite();
LinkedList<StoredTransactionOutput> txOutsSpent = new LinkedList<StoredTransactionOutput>();
LinkedList<StoredTransactionOutput> txOutsCreated = new LinkedList<StoredTransactionOutput>();
long sigOps = 0;
final boolean enforceBIP16 = block.getTimeSeconds() >= NetworkParameters.BIP16_ENFORCE_TIME;
if (scriptVerificationExecutor.isShutdown())
scriptVerificationExecutor =
Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
List<Future<VerificationException>> listScriptVerificationResults =
new ArrayList<Future<VerificationException>>(block.transactions.size());
try {
if (!params.isCheckpoint(height)) {
// BIP30 violator blocks are ones that contain a duplicated transaction. They are all in the
// checkpoints list and we therefore only check non-checkpoints for duplicated transactions
// here. See the
// BIP30 document for more details on this: https://en.litecoin.it/wiki/BIP_0030
for (Transaction tx : block.transactions) {
Sha256Hash hash = tx.getHash();
// If we already have unspent outputs for this hash, we saw the tx already. Either the
// block is
// being added twice (bug) or the block is a BIP30 violator.
if (blockStore.hasUnspentOutputs(hash, tx.getOutputs().size()))
throw new VerificationException("Block failed BIP30 test!");
if (enforceBIP16) // We already check non-BIP16 sigops in Block.verifyTransactions(true)
sigOps += tx.getSigOpCount();
}
}
BigInteger totalFees = BigInteger.ZERO;
BigInteger coinbaseValue = null;
for (Transaction tx : block.transactions) {
boolean isCoinBase = tx.isCoinBase();
BigInteger valueIn = BigInteger.ZERO;
BigInteger valueOut = BigInteger.ZERO;
if (!isCoinBase) {
// For each input of the transaction remove the corresponding output from the set of
// unspent
// outputs.
for (int index = 0; index < tx.getInputs().size(); index++) {
TransactionInput in = tx.getInputs().get(index);
StoredTransactionOutput prevOut =
blockStore.getTransactionOutput(
in.getOutpoint().getHash(), in.getOutpoint().getIndex());
if (prevOut == null)
throw new VerificationException(
"Attempted to spend a non-existent or already spent output!");
// Coinbases can't be spent until they mature, to avoid re-orgs destroying entire
// transaction
// chains. The assumption is there will ~never be re-orgs deeper than the spendable
// coinbase
// chain depth.
if (height - prevOut.getHeight() < params.getSpendableCoinbaseDepth())
throw new VerificationException(
"Tried to spend coinbase at depth " + (height - prevOut.getHeight()));
// TODO: Check we're not spending the genesis transaction here. Satoshis code won't
// allow it.
valueIn = valueIn.add(prevOut.getValue());
if (enforceBIP16) {
if (new Script(params, prevOut.getScriptBytes(), 0, prevOut.getScriptBytes().length)
.isPayToScriptHash()) sigOps += Script.getP2SHSigOpCount(in.getScriptBytes());
if (sigOps > Block.MAX_BLOCK_SIGOPS)
throw new VerificationException("Too many P2SH SigOps in block");
}
// All of these copies are terribly ugly, however without them,
// I see some odd concurrency issues where scripts throw exceptions
// (mostly "Attempted OP_* on empty stack" or similar) when they shouldn't.
// In my tests, total time spent in net.usecredits.credits.core when
// downloading the chain is < 0.5%, so doing this is no big efficiency issue.
// TODO: Find out the underlying issue and create a better work-around
final int currentIndex = index;
final Transaction txCache;
try {
txCache = new Transaction(params, tx.unsafeLitecoinSerialize());
} catch (ProtocolException e1) {
throw new RuntimeException(e1);
}
final Script scriptSig = in.getScriptSig();
final Script scriptPubKey =
new Script(params, prevOut.getScriptBytes(), 0, prevOut.getScriptBytes().length);
FutureTask<VerificationException> future =
new FutureTask<VerificationException>(
new Callable<VerificationException>() {
public VerificationException call() {
try {
scriptSig.correctlySpends(
txCache, currentIndex, scriptPubKey, enforceBIP16);
} catch (VerificationException e) {
return e;
}
return null;
}
});
scriptVerificationExecutor.execute(future);
listScriptVerificationResults.add(future);
// in.getScriptSig().correctlySpends(tx, index, new Script(params,
// prevOut.getScriptBytes(), 0, prevOut.getScriptBytes().length));
blockStore.removeUnspentTransactionOutput(prevOut);
txOutsSpent.add(prevOut);
}
}
Sha256Hash hash = tx.getHash();
for (TransactionOutput out : tx.getOutputs()) {
valueOut = valueOut.add(out.getValue());
// For each output, add it to the set of unspent outputs so it can be consumed in future.
StoredTransactionOutput newOut =
new StoredTransactionOutput(
hash, out.getIndex(), out.getValue(), height, isCoinBase, out.getScriptBytes());
blockStore.addUnspentTransactionOutput(newOut);
txOutsCreated.add(newOut);
}
// All values were already checked for being non-negative (as it is verified in
// Transaction.verify())
// but we check again here just for defence in depth. Transactions with zero output value
// are OK.
if (valueOut.compareTo(BigInteger.ZERO) < 0 || valueOut.compareTo(params.MAX_MONEY) > 0)
throw new VerificationException("Transaction output value out of rage");
if (isCoinBase) {
coinbaseValue = valueOut;
} else {
if (valueIn.compareTo(valueOut) < 0 || valueIn.compareTo(params.MAX_MONEY) > 0)
throw new VerificationException("Transaction input value out of range");
totalFees = totalFees.add(valueIn.subtract(valueOut));
}
}
if (totalFees.compareTo(params.MAX_MONEY) > 0
|| block.getBlockInflation(height).add(totalFees).compareTo(coinbaseValue) < 0)
throw new VerificationException("Transaction fees out of range");
for (Future<VerificationException> future : listScriptVerificationResults) {
VerificationException e;
try {
e = future.get();
} catch (InterruptedException thrownE) {
throw new RuntimeException(thrownE); // Shouldn't happen
} catch (ExecutionException thrownE) {
log.error("Script.correctlySpends threw a non-normal exception: " + thrownE.getCause());
throw new VerificationException(
"Bug in Script.correctlySpends, likely script malformed in some new and interesting way.");
}
if (e != null) throw e;
}
} catch (VerificationException e) {
scriptVerificationExecutor.shutdownNow();
blockStore.abortDatabaseBatchWrite();
throw e;
} catch (BlockStoreException e) {
scriptVerificationExecutor.shutdownNow();
blockStore.abortDatabaseBatchWrite();
throw e;
}
return new TransactionOutputChanges(txOutsCreated, txOutsSpent);
}
private static Protos.Transaction makeTxProto(WalletTransaction wtx) {
Transaction tx = wtx.getTransaction();
Protos.Transaction.Builder txBuilder = Protos.Transaction.newBuilder();
txBuilder
.setPool(Protos.Transaction.Pool.valueOf(wtx.getPool().getValue()))
.setHash(hashToByteString(tx.getHash()))
.setVersion((int) tx.getVersion());
if (tx.getUpdateTime() != null) {
txBuilder.setUpdatedAt(tx.getUpdateTime().getTime());
}
if (tx.getLockTime() > 0) {
txBuilder.setLockTime((int) tx.getLockTime());
}
// Handle inputs.
for (TransactionInput input : tx.getInputs()) {
Protos.TransactionInput.Builder inputBuilder =
Protos.TransactionInput.newBuilder()
.setScriptBytes(ByteString.copyFrom(input.getScriptBytes()))
.setTransactionOutPointHash(hashToByteString(input.getOutpoint().getHash()))
.setTransactionOutPointIndex((int) input.getOutpoint().getIndex());
if (input.hasSequence()) {
inputBuilder.setSequence((int) input.getSequenceNumber());
}
txBuilder.addTransactionInput(inputBuilder);
}
// Handle outputs.
for (TransactionOutput output : tx.getOutputs()) {
Protos.TransactionOutput.Builder outputBuilder =
Protos.TransactionOutput.newBuilder()
.setScriptBytes(ByteString.copyFrom(output.getScriptBytes()))
.setValue(output.getValue().longValue());
final TransactionInput spentBy = output.getSpentBy();
if (spentBy != null) {
Sha256Hash spendingHash = spentBy.getParentTransaction().getHash();
int spentByTransactionIndex = spentBy.getParentTransaction().getInputs().indexOf(spentBy);
outputBuilder
.setSpentByTransactionHash(hashToByteString(spendingHash))
.setSpentByTransactionIndex(spentByTransactionIndex);
}
txBuilder.addTransactionOutput(outputBuilder);
}
// Handle which blocks tx was seen in.
if (tx.getAppearsInHashes() != null) {
for (Sha256Hash hash : tx.getAppearsInHashes()) {
txBuilder.addBlockHash(hashToByteString(hash));
}
}
if (tx.hasConfidence()) {
TransactionConfidence confidence = tx.getConfidence();
Protos.TransactionConfidence.Builder confidenceBuilder =
Protos.TransactionConfidence.newBuilder();
writeConfidence(txBuilder, confidence, confidenceBuilder);
}
return txBuilder.build();
}
private static void send(
List<String> outputs, BigInteger fee, String lockTimeStr, boolean allowUnconfirmed)
throws VerificationException {
try {
// Convert the input strings to outputs.
Transaction t = new Transaction(params);
for (String spec : outputs) {
String[] parts = spec.split(":");
if (parts.length != 2) {
System.err.println("Malformed output specification, must have two parts separated by :");
return;
}
String destination = parts[0];
try {
BigInteger value = Utils.toNanoCoins(parts[1]);
if (destination.startsWith("0")) {
boolean compressed = destination.startsWith("02") || destination.startsWith("03");
// Treat as a raw public key.
BigInteger pubKey = new BigInteger(destination, 16);
ECKey key = new ECKey(null, pubKey.toByteArray(), compressed);
t.addOutput(value, key);
} else {
// Treat as an address.
Address addr = new Address(params, destination);
t.addOutput(value, addr);
}
} catch (WrongNetworkException e) {
System.err.println(
"Malformed output specification, address is for a different network: " + parts[0]);
return;
} catch (AddressFormatException e) {
System.err.println(
"Malformed output specification, could not parse as address: " + parts[0]);
return;
} catch (NumberFormatException e) {
System.err.println(
"Malformed output specification, could not parse as value: " + parts[1]);
}
}
Wallet.SendRequest req = Wallet.SendRequest.forTx(t);
if (t.getOutputs().size() == 1 && t.getOutput(0).getValue().equals(wallet.getBalance())) {
log.info("Emptying out wallet, recipient may get less than what you expect");
req.emptyWallet = true;
}
req.fee = fee;
if (allowUnconfirmed) {
wallet.allowSpendingUnconfirmedTransactions();
}
if (password != null) {
if (!wallet.checkPassword(password)) {
System.err.println("Password is incorrect.");
return;
}
req.aesKey = wallet.getKeyCrypter().deriveKey(password);
}
wallet.completeTx(req);
try {
if (lockTimeStr != null) {
t.setLockTime(Transaction.parseLockTimeStr(lockTimeStr));
// For lock times to take effect, at least one output must have a non-final sequence
// number.
t.getInputs().get(0).setSequenceNumber(0);
// And because we modified the transaction after it was completed, we must re-sign the
// inputs.
t.signInputs(Transaction.SigHash.ALL, wallet);
}
} catch (ParseException e) {
System.err.println("Could not understand --locktime of " + lockTimeStr);
return;
} catch (ScriptException e) {
throw new RuntimeException(e);
}
t = req.tx; // Not strictly required today.
System.out.println(t.getHashAsString());
if (options.has("offline")) {
wallet.commitTx(t);
return;
}
setup();
peers.startAndWait();
// Wait for peers to connect, the tx to be sent to one of them and for it to be propagated
// across the
// network. Once propagation is complete and we heard the transaction back from all our peers,
// it will
// be committed to the wallet.
peers.broadcastTransaction(t).get();
// Hack for regtest/single peer mode, as we're about to shut down and won't get an ACK from
// the remote end.
List<Peer> peerList = peers.getConnectedPeers();
if (peerList.size() == 1) peerList.get(0).ping().get();
} catch (BlockStoreException e) {
throw new RuntimeException(e);
} catch (KeyCrypterException e) {
throw new RuntimeException(e);
} catch (InterruptedException e) {
throw new RuntimeException(e);
} catch (ExecutionException e) {
throw new RuntimeException(e);
} catch (InsufficientMoneyException e) {
System.err.println(
"Insufficient funds: have " + Utils.bitcoinValueToFriendlyString(wallet.getBalance()));
}
}
/**
* Locates the referenced output from the given pool of transactions.
*
* @return The TransactionOutput or null if the transactions map doesn't contain the referenced
* tx.
*/
@Nullable
TransactionOutput getConnectedOutput(Map<Sha256Hash, Transaction> transactions) {
Transaction tx = transactions.get(outpoint.getHash());
if (tx == null) return null;
return tx.getOutputs().get((int) outpoint.getIndex());
}