public static byte[] hashForSignature(
Transaction tx, int inputIndex, byte[] connectedScript, byte sigHashType) {
byte[] serializedSig = serializeForSignature(tx, inputIndex, connectedScript, sigHashType);
Sha256Hash hash = Sha256Hash.twiceOf(serializedSig);
String hashHex = Utils.HEX.encode(hash.getBytes());
// check hash against the reference implementation inside of bitcoinj
byte[] referenceImplementation =
tx.hashForSignature(inputIndex, connectedScript, sigHashType).getBytes();
String referenceImplementationHex = Utils.HEX.encode(referenceImplementation);
if (!hashHex.equals(referenceImplementationHex)) {
logger.error("bitcoins: " + hashHex);
logger.error("bitcoinj: " + referenceImplementationHex);
throw new RuntimeException(
"Difference between BitcoinJSignatureSerialization & Actual Bitcoinj\n"
+ "bitcoin-s: "
+ hashHex
+ "\n"
+ "bitcoin-j: "
+ referenceImplementationHex);
}
return hash.getBytes();
}
