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Add basic support for existing inputs in Transaction.signInputs

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Matt Corallo 2013-05-21 17:19:35 +02:00 committed by Mike Hearn
parent fd4845fa90
commit 842b30e2ca
1 changed files with 15 additions and 0 deletions
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15
core/src/main/java/com/google/bitcoin/core/Transaction.java
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@ -760,6 +760,19 @@ public class Transaction extends ChildMessage implements Serializable {
ECKey[] signingKeys = new ECKey[inputs.size()];
for (int i = 0; i < inputs.size(); i++) {
TransactionInput input = inputs.get(i);
// We don't have the connected output, we assume it was signed already and move on
if (input.getOutpoint().getConnectedOutput() == null) {
log.warn("Missing connected output, assuming input {} is already signed.", i);
continue;
}
try {
// We assume if its already signed, its hopefully got a SIGHASH type that will not invalidate when
// we sign missing pieces (to check this would require either assuming any signatures are signing
// standard output types or a way to get processed signatures out of script execution)
input.getScriptSig().correctlySpends(this, i, input.getOutpoint().getConnectedOutput().getScriptPubKey(), true);
log.warn("Input {} already correctly spends output, assuming SIGHASH type used will be safe and skipping signing.", i);
continue;
} catch (ScriptException e) {}
if (input.getScriptBytes().length != 0)
log.warn("Re-signing an already signed transaction! Be sure this is what you want.");
// Find the signing key we'll need to use.
@ -786,6 +799,8 @@ public class Transaction extends ChildMessage implements Serializable {
// to the address and then checks the signature.
// 2) For pay-to-key outputs: just a signature.
for (int i = 0; i < inputs.size(); i++) {
if (signatures[i] == null)
continue;
TransactionInput input = inputs.get(i);
Script scriptPubKey = input.getOutpoint().getConnectedOutput().getScriptPubKey();
if (scriptPubKey.isSentToAddress()) {