diff options
Diffstat (limited to 'src/psbt.cpp')
| -rw-r--r-- | src/psbt.cpp | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/src/psbt.cpp b/src/psbt.cpp index fe45f2318c..009ed966ed 100644 --- a/src/psbt.cpp +++ b/src/psbt.cpp @@ -442,6 +442,38 @@ bool SignPSBTInput(const SigningProvider& provider, PartiallySignedTransaction& return sig_complete; } +void RemoveUnnecessaryTransactions(PartiallySignedTransaction& psbtx, const int& sighash_type) +{ + // Only drop non_witness_utxos if sighash_type != SIGHASH_ANYONECANPAY + if ((sighash_type & 0x80) != SIGHASH_ANYONECANPAY) { + // Figure out if any non_witness_utxos should be dropped + std::vector<unsigned int> to_drop; + for (unsigned int i = 0; i < psbtx.inputs.size(); ++i) { + const auto& input = psbtx.inputs.at(i); + int wit_ver; + std::vector<unsigned char> wit_prog; + if (input.witness_utxo.IsNull() || !input.witness_utxo.scriptPubKey.IsWitnessProgram(wit_ver, wit_prog)) { + // There's a non-segwit input or Segwit v0, so we cannot drop any witness_utxos + to_drop.clear(); + break; + } + if (wit_ver == 0) { + // Segwit v0, so we cannot drop any non_witness_utxos + to_drop.clear(); + break; + } + if (input.non_witness_utxo) { + to_drop.push_back(i); + } + } + + // Drop the non_witness_utxos that we can drop + for (unsigned int i : to_drop) { + psbtx.inputs.at(i).non_witness_utxo = nullptr; + } + } +} + bool FinalizePSBT(PartiallySignedTransaction& psbtx) { // Finalize input signatures -- in case we have partial signatures that add up to a complete |