diff options
Diffstat (limited to 'src/wallet/psbtwallet.cpp')
-rw-r--r-- | src/wallet/psbtwallet.cpp | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/src/wallet/psbtwallet.cpp b/src/wallet/psbtwallet.cpp new file mode 100644 index 0000000000..721a244afb --- /dev/null +++ b/src/wallet/psbtwallet.cpp @@ -0,0 +1,51 @@ +// Copyright (c) 2009-2019 The Bitcoin Core developers +// Distributed under the MIT software license, see the accompanying +// file COPYING or http://www.opensource.org/licenses/mit-license.php. + +#include <wallet/psbtwallet.h> + +TransactionError FillPSBT(const CWallet* pwallet, PartiallySignedTransaction& psbtx, bool& complete, int sighash_type, bool sign, bool bip32derivs) +{ + LOCK(pwallet->cs_wallet); + // Get all of the previous transactions + complete = true; + for (unsigned int i = 0; i < psbtx.tx->vin.size(); ++i) { + const CTxIn& txin = psbtx.tx->vin[i]; + PSBTInput& input = psbtx.inputs.at(i); + + if (PSBTInputSigned(input)) { + continue; + } + + // Verify input looks sane. This will check that we have at most one uxto, witness or non-witness. + if (!input.IsSane()) { + return TransactionError::INVALID_PSBT; + } + + // If we have no utxo, grab it from the wallet. + if (!input.non_witness_utxo && input.witness_utxo.IsNull()) { + const uint256& txhash = txin.prevout.hash; + const auto it = pwallet->mapWallet.find(txhash); + if (it != pwallet->mapWallet.end()) { + const CWalletTx& wtx = it->second; + // We only need the non_witness_utxo, which is a superset of the witness_utxo. + // The signing code will switch to the smaller witness_utxo if this is ok. + input.non_witness_utxo = wtx.tx; + } + } + + // Get the Sighash type + if (sign && input.sighash_type > 0 && input.sighash_type != sighash_type) { + return TransactionError::SIGHASH_MISMATCH; + } + + complete &= SignPSBTInput(HidingSigningProvider(pwallet, !sign, !bip32derivs), psbtx, i, sighash_type); + } + + // Fill in the bip32 keypaths and redeemscripts for the outputs so that hardware wallets can identify change + for (unsigned int i = 0; i < psbtx.tx->vout.size(); ++i) { + UpdatePSBTOutput(HidingSigningProvider(pwallet, true, !bip32derivs), psbtx, i); + } + + return TransactionError::OK; +} |