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ensure unique stonewall input txids for entire tx (not just per set)

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This commit is contained in:
Craig Raw 2022-03-30 08:55:41 +02:00
parent d1088fe9ee
commit 20f4ac9657
1 changed files with 19 additions and 16 deletions
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33
src/main/java/com/sparrowwallet/drongo/wallet/StonewallUtxoSelector.java
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@ -21,18 +21,31 @@ public class StonewallUtxoSelector implements UtxoSelector {
public List<Collection<BlockTransactionHashIndex>> selectSets(long targetValue, Collection<OutputGroup> candidates) {
long actualTargetValue = targetValue + noInputsFee;
List<OutputGroup> preferredCandidates = candidates.stream().filter(outputGroup -> outputGroup.getScriptType().equals(preferredScriptType)).collect(Collectors.toList());
List<OutputGroup> uniqueCandidates = new ArrayList<>();
for(OutputGroup candidate : candidates) {
OutputGroup existingTxGroup = getTransactionAlreadySelected(uniqueCandidates, candidate);
if(existingTxGroup != null) {
if(candidate.getValue() > existingTxGroup.getValue()) {
uniqueCandidates.remove(existingTxGroup);
uniqueCandidates.add(candidate);
}
} else {
uniqueCandidates.add(candidate);
}
}
List<OutputGroup> preferredCandidates = uniqueCandidates.stream().filter(outputGroup -> outputGroup.getScriptType().equals(preferredScriptType)).collect(Collectors.toList());
List<Collection<BlockTransactionHashIndex>> preferredSets = selectSets(targetValue, preferredCandidates, actualTargetValue);
if(!preferredSets.isEmpty()) {
return preferredSets;
}
return selectSets(targetValue, candidates, actualTargetValue);
return selectSets(targetValue, uniqueCandidates, actualTargetValue);
}
private List<Collection<BlockTransactionHashIndex>> selectSets(long targetValue, Collection<OutputGroup> candidates, long actualTargetValue) {
for(int i = 0; i < 10; i++) {
List<OutputGroup> randomized = new ArrayList<>(candidates);
private List<Collection<BlockTransactionHashIndex>> selectSets(long targetValue, List<OutputGroup> uniqueCandidates, long actualTargetValue) {
for(int i = 0; i < 15; i++) {
List<OutputGroup> randomized = new ArrayList<>(uniqueCandidates);
Collections.shuffle(randomized, random);
List<OutputGroup> set1 = new ArrayList<>();
@ -53,17 +66,7 @@ public class StonewallUtxoSelector implements UtxoSelector {
long selectedValue = 0;
while(selectedValue <= targetValue && !randomized.isEmpty()) {
OutputGroup candidate = randomized.remove(0);
OutputGroup existingTxGroup = getTransactionAlreadySelected(selectedSet, candidate);
if(existingTxGroup != null) {
if(candidate.getValue() > existingTxGroup.getValue()) {
selectedSet.remove(existingTxGroup);
selectedSet.add(candidate);
}
} else {
selectedSet.add(candidate);
}
selectedValue = selectedSet.stream().mapToLong(OutputGroup::getEffectiveValue).sum();
}