/** Checks the output to see if the script violates a standardness rule. Not complete. */
public static RuleViolation isOutputStandard(TransactionOutput output) {
if (output.getValue().compareTo(MIN_ANALYSIS_NONDUST_OUTPUT) < 0) return RuleViolation.DUST;
for (ScriptChunk chunk : output.getScriptPubKey().getChunks()) {
if (chunk.isPushData() && !chunk.isShortestPossiblePushData())
return RuleViolation.SHORTEST_POSSIBLE_PUSHDATA;
}
return RuleViolation.NONE;
}
private boolean isConfirmed(TransactionOutput output) {
return output
.getParentTransaction()
.getConfidence()
.getConfidenceType()
.equals(TransactionConfidence.ConfidenceType.BUILDING);
}
@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.
}
}