/**
* Verifies that this input can spend the given output. Note that this input must be a part of a
* transaction. Also note that the consistency of the outpoint will be checked, even if this input
* has not been connected.
*
* @param output the output that this input is supposed to spend.
* @throws ScriptException If the script doesn't verify.
* @throws VerificationException If the outpoint doesn't match the given output.
*/
public void verify(TransactionOutput output) throws VerificationException {
if (output.parent != null) {
if (!getOutpoint().getHash().equals(output.getParentTransaction().getHash()))
throw new VerificationException(
"This input does not refer to the tx containing the output.");
if (getOutpoint().getIndex() != output.getIndex())
throw new VerificationException("This input refers to a different output on the given tx.");
}
Script pubKey = output.getScriptPubKey();
int myIndex = getParentTransaction().getInputs().indexOf(this);
getScriptSig().correctlySpends(getParentTransaction(), myIndex, pubKey);
}
@Override
public CoinSelection select(Coin target, List<TransactionOutput> candidates) {
try {
LinkedList<TransactionOutput> gathered = Lists.newLinkedList();
Coin valueGathered = Coin.ZERO;
for (TransactionOutput output : candidates) {
if (ignorePending && !isConfirmed(output)) continue;
// Find the key that controls output, assuming it's a regular pay-to-pubkey or
// pay-to-address output.
// We ignore any other kind of exotic output on the assumption we can't spend it ourselves.
final Script scriptPubKey = output.getScriptPubKey();
ECKey controllingKey;
if (scriptPubKey.isSentToRawPubKey()) {
controllingKey = wallet.findKeyFromPubKey(scriptPubKey.getPubKey());
} else if (scriptPubKey.isSentToAddress()) {
controllingKey = wallet.findKeyFromPubHash(scriptPubKey.getPubKeyHash());
} else {
log.info("Skipping tx output {} because it's not of simple form.", output);
continue;
}
checkNotNull(
controllingKey, "Coin selector given output as candidate for which we lack the key");
if (controllingKey.getCreationTimeSeconds() >= unixTimeSeconds) continue;
// It's older than the cutoff time so select.
valueGathered = valueGathered.add(output.getValue());
gathered.push(output);
if (gathered.size() >= MAX_SIMULTANEOUS_INPUTS) {
log.warn(
"Reached {} inputs, going further would yield a tx that is too large, stopping here.",
gathered.size());
break;
}
}
return new CoinSelection(valueGathered, gathered);
} catch (ScriptException e) {
throw new RuntimeException(
e); // We should never have problems understanding scripts in our wallet.
}
}