diff options
| -rw-r--r-- | src/psbt.cpp | 6 | ||||
| -rw-r--r-- | src/wallet/wallet.cpp | 29 |
2 files changed, 32 insertions, 3 deletions
diff --git a/src/psbt.cpp b/src/psbt.cpp index e4bac4aa63..98fde4cb04 100644 --- a/src/psbt.cpp +++ b/src/psbt.cpp @@ -184,7 +184,6 @@ void PSBTInput::Merge(const PSBTInput& input) { if (!non_witness_utxo && input.non_witness_utxo) non_witness_utxo = input.non_witness_utxo; if (witness_utxo.IsNull() && !input.witness_utxo.IsNull()) { - // TODO: For segwit v1, we will want to clear out the non-witness utxo when setting a witness one. For v0 and non-segwit, this is not safe witness_utxo = input.witness_utxo; } @@ -367,10 +366,11 @@ bool SignPSBTInput(const SigningProvider& provider, PartiallySignedTransaction& input.FromSignatureData(sigdata); // If we have a witness signature, put a witness UTXO. - // TODO: For segwit v1, we should remove the non_witness_utxo if (sigdata.witness) { input.witness_utxo = utxo; - // input.non_witness_utxo = nullptr; + // We can remove the non_witness_utxo if and only if there are no non-segwit or segwit v0 + // inputs in this transaction. Since this requires inspecting the entire transaction, this + // is something for the caller to deal with (i.e. FillPSBT). } // Fill in the missing info diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp index d0b093bbb7..041481559b 100644 --- a/src/wallet/wallet.cpp +++ b/src/wallet/wallet.cpp @@ -2006,6 +2006,35 @@ TransactionError CWallet::FillPSBT(PartiallySignedTransaction& psbtx, bool& comp } } + // 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; + } + } + // Complete if every input is now signed complete = true; for (const auto& input : psbtx.inputs) { |