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derive to maximum bip32 account level where child path in output descriptor contains more than two elements

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This commit is contained in:
Craig Raw 2025-06-06 11:45:32 +02:00
parent abb598d3b0
commit ad02b8a33c
1 changed files with 18 additions and 3 deletions
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21
src/main/java/com/sparrowwallet/drongo/OutputDescriptor.java
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@ -440,15 +440,30 @@ public class OutputDescriptor {
KeyDerivation keyDerivation = new KeyDerivation(masterFingerprint, keyDerivationPath);
try {
ExtendedKey extendedKey = ExtendedKey.fromDescriptor(extKey);
if(childDerivationPath != null) {
try {
List<ChildNumber> childPath = KeyDerivation.parsePath(childDerivationPath.replace("<0;1>", "0"));
if(childPath.size() > 2 && (extendedKey.getKey().hasPrivKey() || childPath.stream().noneMatch(ChildNumber::isHardened))) {
childDerivationPath = childDerivationPath.substring(childDerivationPath.lastIndexOf("/", childDerivationPath.lastIndexOf("/") - 1));
childPath = childPath.subList(0, childPath.size() - 2);
keyDerivation = keyDerivation.extend(childPath);
childPath.addFirst(extendedKey.getKeyChildNumber());
DeterministicKey derivedKey = extendedKey.getKey(childPath);
extendedKey = new ExtendedKey(derivedKey, derivedKey.getParentFingerprint(), childPath.getLast());
}
} catch(Exception e) {
//ignore and continue
}
}
if(extendedKey.getKey().hasPrivKey()) {
ExtendedKey privateExtendedKey = extendedKey;
List<ChildNumber> derivation = keyDerivation.getDerivation();
int depth = derivation.size() == 0 ? scriptType.getDefaultDerivation().size() : derivation.size();
int depth = derivation.isEmpty() ? scriptType.getDefaultDerivation().size() : derivation.size();
DeterministicKey prvKey = extendedKey.getKey();
DeterministicKey pubKey = new DeterministicKey(prvKey.getPath(), prvKey.getChainCode(), prvKey.getPubKey(), depth, extendedKey.getParentFingerprint());
DeterministicKey pubKey = new DeterministicKey(List.of(prvKey.getPath().getLast()), prvKey.getChainCode(), prvKey.getPubKey(), depth, extendedKey.getParentFingerprint());
extendedKey = new ExtendedKey(pubKey, pubKey.getParentFingerprint(), extendedKey.getKeyChildNumber());
if(derivation.size() == 0) {
if(derivation.isEmpty()) {
masterPrivateKeyMap.put(extendedKey, privateExtendedKey);
}
}