/** Returns true if the tx is a valid settlement transaction. */
public synchronized boolean isSettlementTransaction(Transaction tx) {
try {
tx.verify();
tx.getInput(0).verify(multisigContract.getOutput(0));
return true;
} catch (VerificationException e) {
return false;
}
}
/**
* Generates a Payment message based on the information in the PaymentRequest. Provide
* transactions built by the wallet. If the PaymentRequest did not specify a payment_url, returns
* null.
*
* @param txns list of transactions to be included with the Payment message.
* @param refundAddr will be used by the merchant to send money back if there was a problem.
* @param memo is a message to include in the payment message sent to the merchant.
*/
public @Nullable Protos.Payment getPayment(
List<Transaction> txns, @Nullable Address refundAddr, @Nullable String memo)
throws IOException {
if (!paymentDetails.hasPaymentUrl()) return null;
Protos.Payment.Builder payment = Protos.Payment.newBuilder();
if (paymentDetails.hasMerchantData()) payment.setMerchantData(paymentDetails.getMerchantData());
if (refundAddr != null) {
Protos.Output.Builder refundOutput = Protos.Output.newBuilder();
refundOutput.setAmount(totalValue.longValue());
refundOutput.setScript(
ByteString.copyFrom(ScriptBuilder.createOutputScript(refundAddr).getProgram()));
payment.addRefundTo(refundOutput);
}
if (memo != null) {
payment.setMemo(memo);
}
for (Transaction txn : txns) {
txn.verify();
ByteArrayOutputStream o = new ByteArrayOutputStream();
txn.bitcoinSerialize(o);
payment.addTransactions(ByteString.copyFrom(o.toByteArray()));
}
return payment.build();
}
@Test
public void dataDrivenInvalidTransactions() throws Exception {
BufferedReader in =
new BufferedReader(
new InputStreamReader(
getClass().getResourceAsStream("tx_invalid.json"), Charset.forName("UTF-8")));
NetworkParameters params = TestNet3Params.get();
// Poor man's (aka. really, really poor) JSON parser (because pulling in a lib for this is
// probably overkill)
List<JSONObject> tx = new ArrayList<JSONObject>(1);
in.read(); // remove first [
StringBuffer buffer = new StringBuffer(1000);
while (in.ready()) {
String line = in.readLine();
if (line == null || line.equals("")) continue;
buffer.append(line);
if (line.equals("]") && buffer.toString().equals("]") && !in.ready()) break; // ignore last ]
boolean isFinished = appendToList(tx, buffer);
while (tx.size() > 0
&& tx.get(0).isList()
&& tx.get(0).list.size() == 1
&& tx.get(0).list.get(0).isString()) tx.remove(0);
if (isFinished && tx.size() == 1 && tx.get(0).list.size() == 3) {
HashMap<TransactionOutPoint, Script> scriptPubKeys =
new HashMap<TransactionOutPoint, Script>();
for (JSONObject input : tx.get(0).list.get(0).list) {
String hash = input.list.get(0).string;
int index = input.list.get(1).integer;
String script = input.list.get(2).string;
Sha256Hash sha256Hash =
new Sha256Hash(Hex.decode(hash.getBytes(Charset.forName("UTF-8"))));
scriptPubKeys.put(
new TransactionOutPoint(params, index, sha256Hash), parseScriptString(script));
}
byte[] bytes = tx.get(0).list.get(1).string.getBytes(Charset.forName("UTF-8"));
Transaction transaction = new Transaction(params, Hex.decode(bytes));
boolean enforceP2SH = tx.get(0).list.get(2).booleanValue;
assertTrue(tx.get(0).list.get(2).isBoolean());
boolean valid = true;
try {
transaction.verify();
} catch (VerificationException e) {
valid = false;
}
// The reference client checks this case in CheckTransaction, but we leave it to
// later where we will see an attempt to double-spend, so we explicitly check here
HashSet<TransactionOutPoint> set = new HashSet<TransactionOutPoint>();
for (TransactionInput input : transaction.getInputs()) {
if (set.contains(input.getOutpoint())) valid = false;
set.add(input.getOutpoint());
}
for (int i = 0; i < transaction.getInputs().size() && valid; i++) {
TransactionInput input = transaction.getInputs().get(i);
assertTrue(scriptPubKeys.containsKey(input.getOutpoint()));
try {
input
.getScriptSig()
.correctlySpends(
transaction, i, scriptPubKeys.get(input.getOutpoint()), enforceP2SH);
} catch (VerificationException e) {
valid = false;
}
}
if (valid) fail();
tx.clear();
}
}
in.close();
}
@Test
public void dataDrivenValidTransactions() throws Exception {
BufferedReader in =
new BufferedReader(
new InputStreamReader(
getClass().getResourceAsStream("tx_valid.json"), Charset.forName("UTF-8")));
NetworkParameters params = TestNet3Params.get();
// Poor man's (aka. really, really poor) JSON parser (because pulling in a lib for this is
// probably not overkill)
int lineNum = -1;
List<JSONObject> tx = new ArrayList<JSONObject>(3);
in.read(); // remove first [
StringBuffer buffer = new StringBuffer(1000);
while (in.ready()) {
lineNum++;
String line = in.readLine();
if (line == null || line.equals("")) continue;
buffer.append(line);
if (line.equals("]") && buffer.toString().equals("]") && !in.ready()) break;
boolean isFinished = appendToList(tx, buffer);
while (tx.size() > 0
&& tx.get(0).isList()
&& tx.get(0).list.size() == 1
&& tx.get(0).list.get(0).isString()) tx.remove(0); // ignore last ]
if (isFinished && tx.size() == 1 && tx.get(0).list.size() == 3) {
Transaction transaction = null;
try {
HashMap<TransactionOutPoint, Script> scriptPubKeys =
new HashMap<TransactionOutPoint, Script>();
for (JSONObject input : tx.get(0).list.get(0).list) {
String hash = input.list.get(0).string;
int index = input.list.get(1).integer;
String script = input.list.get(2).string;
Sha256Hash sha256Hash =
new Sha256Hash(Hex.decode(hash.getBytes(Charset.forName("UTF-8"))));
scriptPubKeys.put(
new TransactionOutPoint(params, index, sha256Hash), parseScriptString(script));
}
byte[] bytes = tx.get(0).list.get(1).string.getBytes(Charset.forName("UTF-8"));
transaction = new Transaction(params, Hex.decode(bytes));
boolean enforceP2SH = tx.get(0).list.get(2).booleanValue;
assertTrue(tx.get(0).list.get(2).isBoolean());
transaction.verify();
for (int i = 0; i < transaction.getInputs().size(); i++) {
TransactionInput input = transaction.getInputs().get(i);
if (input.getOutpoint().getIndex() == 0xffffffffL) input.getOutpoint().setIndex(-1);
assertTrue(scriptPubKeys.containsKey(input.getOutpoint()));
input
.getScriptSig()
.correctlySpends(
transaction, i, scriptPubKeys.get(input.getOutpoint()), enforceP2SH);
}
tx.clear();
} catch (Exception e) {
System.err.println("Exception processing line " + lineNum + ": " + line);
if (transaction != null) System.err.println(transaction);
throw e;
}
}
}
in.close();
}