diff options
Diffstat (limited to 'src/wallet')
| -rw-r--r-- | src/wallet/wallet.cpp | 78 | ||||
| -rw-r--r-- | src/wallet/wallet.h | 8 |
2 files changed, 70 insertions, 16 deletions
diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp index 9d2e5598e8..d25fba8bb6 100644 --- a/src/wallet/wallet.cpp +++ b/src/wallet/wallet.cpp @@ -2410,34 +2410,71 @@ bool CWallet::SelectCoins(const std::vector<COutput>& vAvailableCoins, const CAm return res; } -bool CWallet::SignTransaction(CMutableTransaction& tx) +bool CWallet::SignTransaction(CMutableTransaction& tx) const { AssertLockHeld(cs_wallet); - // sign the new tx - int nIn = 0; + // Build coins map + std::map<COutPoint, Coin> coins; for (auto& input : tx.vin) { std::map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(input.prevout.hash); if(mi == mapWallet.end() || input.prevout.n >= mi->second.tx->vout.size()) { return false; } - const CScript& scriptPubKey = mi->second.tx->vout[input.prevout.n].scriptPubKey; - const CAmount& amount = mi->second.tx->vout[input.prevout.n].nValue; - SignatureData sigdata; + const CWalletTx& wtx = mi->second; + coins[input.prevout] = Coin(wtx.tx->vout[input.prevout.n], wtx.m_confirm.block_height, wtx.IsCoinBase()); + } + std::map<int, std::string> input_errors; + return SignTransaction(tx, coins, SIGHASH_ALL, input_errors); +} + +bool CWallet::SignTransaction(CMutableTransaction& tx, const std::map<COutPoint, Coin>& coins, int sighash, std::map<int, std::string>& input_errors) const +{ + // Sign the tx with ScriptPubKeyMans + // Because each ScriptPubKeyMan can sign more than one input, we need to keep track of each ScriptPubKeyMan that has signed this transaction. + // Each iteration, we may sign more txins than the txin that is specified in that iteration. + // We assume that each input is signed by only one ScriptPubKeyMan. + std::set<uint256> visited_spk_mans; + for (unsigned int i = 0; i < tx.vin.size(); i++) { + // Get the prevout + CTxIn& txin = tx.vin[i]; + auto coin = coins.find(txin.prevout); + if (coin == coins.end() || coin->second.IsSpent()) { + input_errors[i] = "Input not found or already spent"; + continue; + } - std::unique_ptr<SigningProvider> provider = GetSigningProvider(scriptPubKey); - if (!provider) { - // We don't know about this scriptpbuKey; - return false; + // Check if this input is complete + SignatureData sigdata = DataFromTransaction(tx, i, coin->second.out); + if (sigdata.complete) { + continue; } - if (!ProduceSignature(*provider, MutableTransactionSignatureCreator(&tx, nIn, amount, SIGHASH_ALL), scriptPubKey, sigdata)) { - return false; + // Input needs to be signed, find the right ScriptPubKeyMan + std::set<ScriptPubKeyMan*> spk_mans = GetScriptPubKeyMans(coin->second.out.scriptPubKey, sigdata); + if (spk_mans.size() == 0) { + input_errors[i] = "Unable to sign input, missing keys"; + continue; + } + + for (auto& spk_man : spk_mans) { + // If we've already been signed by this spk_man, skip it + if (visited_spk_mans.count(spk_man->GetID()) > 0) { + continue; + } + + // Sign the tx. + // spk_man->SignTransaction will return true if the transaction is complete, + // so we can exit early and return true if that happens. + if (spk_man->SignTransaction(tx, coins, sighash, input_errors)) { + return true; + } + + // Add this spk_man to visited_spk_mans so we can skip it later + visited_spk_mans.insert(spk_man->GetID()); } - UpdateInput(input, sigdata); - nIn++; } - return true; + return false; } bool CWallet::FundTransaction(CMutableTransaction& tx, CAmount& nFeeRet, int& nChangePosInOut, std::string& strFailReason, bool lockUnspents, const std::set<int>& setSubtractFeeFromOutputs, CCoinControl coinControl) @@ -4155,6 +4192,17 @@ ScriptPubKeyMan* CWallet::GetScriptPubKeyMan(const OutputType& type, bool intern return it->second; } +std::set<ScriptPubKeyMan*> CWallet::GetScriptPubKeyMans(const CScript& script, SignatureData& sigdata) const +{ + std::set<ScriptPubKeyMan*> spk_mans; + for (const auto& spk_man_pair : m_spk_managers) { + if (spk_man_pair.second->CanProvide(script, sigdata)) { + spk_mans.insert(spk_man_pair.second.get()); + } + } + return spk_mans; +} + ScriptPubKeyMan* CWallet::GetScriptPubKeyMan(const CScript& script) const { SignatureData sigdata; diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h index 3664a6787c..10380e4e58 100644 --- a/src/wallet/wallet.h +++ b/src/wallet/wallet.h @@ -916,7 +916,10 @@ public: * calling CreateTransaction(); */ bool FundTransaction(CMutableTransaction& tx, CAmount& nFeeRet, int& nChangePosInOut, std::string& strFailReason, bool lockUnspents, const std::set<int>& setSubtractFeeFromOutputs, CCoinControl); - bool SignTransaction(CMutableTransaction& tx) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet); + // Fetch the inputs and sign with SIGHASH_ALL. + bool SignTransaction(CMutableTransaction& tx) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet); + // Sign the tx given the input coins and sighash. + bool SignTransaction(CMutableTransaction& tx, const std::map<COutPoint, Coin>& coins, int sighash, std::map<int, std::string>& input_errors) const; /** * Create a new transaction paying the recipients with a set of coins @@ -1153,6 +1156,9 @@ public: //! Get the ScriptPubKeyMan by id ScriptPubKeyMan* GetScriptPubKeyMan(const uint256& id) const; + //! Get all of the ScriptPubKeyMans for a script given additional information in sigdata (populated by e.g. a psbt) + std::set<ScriptPubKeyMan*> GetScriptPubKeyMans(const CScript& script, SignatureData& sigdata) const; + //! Get the SigningProvider for a script std::unique_ptr<SigningProvider> GetSigningProvider(const CScript& script) const; std::unique_ptr<SigningProvider> GetSigningProvider(const CScript& script, SignatureData& sigdata) const; |