LCOV - code coverage report
Current view: top level - src/script - sign.cpp (source / functions) Hit Total Coverage
Test: coverage.lcov Lines: 476 498 95.6 %
Date: 2022-04-21 14:51:19 Functions: 31 31 100.0 %
Legend: Modified by patch:
Lines: hit not hit | Branches: + taken - not taken # not executed

Not modified by patch:
Lines: hit not hit | Branches: + taken - not taken # not executed
Branches: 236 282 83.7 %

           Branch data     Line data    Source code
#       1                 :            : // Copyright (c) 2009-2010 Satoshi Nakamoto
#       2                 :            : // Copyright (c) 2009-2021 The Bitcoin Core developers
#       3                 :            : // Distributed under the MIT software license, see the accompanying
#       4                 :            : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
#       5                 :            : 
#       6                 :            : #include <script/sign.h>
#       7                 :            : 
#       8                 :            : #include <consensus/amount.h>
#       9                 :            : #include <key.h>
#      10                 :            : #include <policy/policy.h>
#      11                 :            : #include <primitives/transaction.h>
#      12                 :            : #include <script/keyorigin.h>
#      13                 :            : #include <script/signingprovider.h>
#      14                 :            : #include <script/standard.h>
#      15                 :            : #include <uint256.h>
#      16                 :            : #include <util/translation.h>
#      17                 :            : #include <util/vector.h>
#      18                 :            : 
#      19                 :            : typedef std::vector<unsigned char> valtype;
#      20                 :            : 
#      21                 :            : MutableTransactionSignatureCreator::MutableTransactionSignatureCreator(const CMutableTransaction* tx, unsigned int input_idx, const CAmount& amount, int hash_type)
#      22                 :            :     : txTo{tx}, nIn{input_idx}, nHashType{hash_type}, amount{amount}, checker{txTo, nIn, amount, MissingDataBehavior::FAIL},
#      23                 :            :       m_txdata(nullptr)
#      24                 :      10038 : {
#      25                 :      10038 : }
#      26                 :            : 
#      27                 :            : MutableTransactionSignatureCreator::MutableTransactionSignatureCreator(const CMutableTransaction* tx, unsigned int input_idx, const CAmount& amount, const PrecomputedTransactionData* txdata, int hash_type)
#      28                 :            :     : txTo{tx}, nIn{input_idx}, nHashType{hash_type}, amount{amount},
#      29                 :            :       checker{txdata ? MutableTransactionSignatureChecker{txTo, nIn, amount, *txdata, MissingDataBehavior::FAIL} :
#      30                 :            :                        MutableTransactionSignatureChecker{txTo, nIn, amount, MissingDataBehavior::FAIL}},
#      31                 :            :       m_txdata(txdata)
#      32                 :      83238 : {
#      33                 :      83238 : }
#      34                 :            : 
#      35                 :            : bool MutableTransactionSignatureCreator::CreateSig(const SigningProvider& provider, std::vector<unsigned char>& vchSig, const CKeyID& address, const CScript& scriptCode, SigVersion sigversion) const
#      36                 :      40829 : {
#      37                 :      40829 :     assert(sigversion == SigVersion::BASE || sigversion == SigVersion::WITNESS_V0);
#      38                 :            : 
#      39                 :          0 :     CKey key;
#      40         [ +  + ]:      40829 :     if (!provider.GetKey(address, key))
#      41                 :       4636 :         return false;
#      42                 :            : 
#      43                 :            :     // Signing with uncompressed keys is disabled in witness scripts
#      44 [ +  + ][ +  + ]:      36193 :     if (sigversion == SigVersion::WITNESS_V0 && !key.IsCompressed())
#      45                 :          8 :         return false;
#      46                 :            : 
#      47                 :            :     // Signing without known amount does not work in witness scripts.
#      48 [ +  + ][ -  + ]:      36185 :     if (sigversion == SigVersion::WITNESS_V0 && !MoneyRange(amount)) return false;
#      49                 :            : 
#      50                 :            :     // BASE/WITNESS_V0 signatures don't support explicit SIGHASH_DEFAULT, use SIGHASH_ALL instead.
#      51         [ +  + ]:      36185 :     const int hashtype = nHashType == SIGHASH_DEFAULT ? SIGHASH_ALL : nHashType;
#      52                 :            : 
#      53                 :      36185 :     uint256 hash = SignatureHash(scriptCode, *txTo, nIn, hashtype, amount, sigversion, m_txdata);
#      54         [ -  + ]:      36185 :     if (!key.Sign(hash, vchSig))
#      55                 :          0 :         return false;
#      56                 :      36185 :     vchSig.push_back((unsigned char)hashtype);
#      57                 :      36185 :     return true;
#      58                 :      36185 : }
#      59                 :            : 
#      60                 :            : bool MutableTransactionSignatureCreator::CreateSchnorrSig(const SigningProvider& provider, std::vector<unsigned char>& sig, const XOnlyPubKey& pubkey, const uint256* leaf_hash, const uint256* merkle_root, SigVersion sigversion) const
#      61                 :      20087 : {
#      62                 :      20087 :     assert(sigversion == SigVersion::TAPROOT || sigversion == SigVersion::TAPSCRIPT);
#      63                 :            : 
#      64                 :          0 :     CKey key;
#      65         [ +  + ]:      20087 :     if (!provider.GetKeyByXOnly(pubkey, key)) return false;
#      66                 :            : 
#      67                 :            :     // BIP341/BIP342 signing needs lots of precomputed transaction data. While some
#      68                 :            :     // (non-SIGHASH_DEFAULT) sighash modes exist that can work with just some subset
#      69                 :            :     // of data present, for now, only support signing when everything is provided.
#      70 [ -  + ][ -  + ]:        301 :     if (!m_txdata || !m_txdata->m_bip341_taproot_ready || !m_txdata->m_spent_outputs_ready) return false;
#                 [ -  + ]
#      71                 :            : 
#      72                 :        301 :     ScriptExecutionData execdata;
#      73                 :        301 :     execdata.m_annex_init = true;
#      74                 :        301 :     execdata.m_annex_present = false; // Only support annex-less signing for now.
#      75         [ +  + ]:        301 :     if (sigversion == SigVersion::TAPSCRIPT) {
#      76                 :        179 :         execdata.m_codeseparator_pos_init = true;
#      77                 :        179 :         execdata.m_codeseparator_pos = 0xFFFFFFFF; // Only support non-OP_CODESEPARATOR BIP342 signing for now.
#      78         [ -  + ]:        179 :         if (!leaf_hash) return false; // BIP342 signing needs leaf hash.
#      79                 :        179 :         execdata.m_tapleaf_hash_init = true;
#      80                 :        179 :         execdata.m_tapleaf_hash = *leaf_hash;
#      81                 :        179 :     }
#      82                 :        301 :     uint256 hash;
#      83         [ -  + ]:        301 :     if (!SignatureHashSchnorr(hash, execdata, *txTo, nIn, nHashType, sigversion, *m_txdata, MissingDataBehavior::FAIL)) return false;
#      84                 :        301 :     sig.resize(64);
#      85                 :            :     // Use uint256{} as aux_rnd for now.
#      86         [ -  + ]:        301 :     if (!key.SignSchnorr(hash, sig, merkle_root, {})) return false;
#      87         [ +  + ]:        301 :     if (nHashType) sig.push_back(nHashType);
#      88                 :        301 :     return true;
#      89                 :        301 : }
#      90                 :            : 
#      91                 :            : static bool GetCScript(const SigningProvider& provider, const SignatureData& sigdata, const CScriptID& scriptid, CScript& script)
#      92                 :      21466 : {
#      93         [ +  + ]:      21466 :     if (provider.GetCScript(scriptid, script)) {
#      94                 :      15821 :         return true;
#      95                 :      15821 :     }
#      96                 :            :     // Look for scripts in SignatureData
#      97         [ +  + ]:       5645 :     if (CScriptID(sigdata.redeem_script) == scriptid) {
#      98                 :        385 :         script = sigdata.redeem_script;
#      99                 :        385 :         return true;
#     100         [ +  + ]:       5260 :     } else if (CScriptID(sigdata.witness_script) == scriptid) {
#     101                 :        786 :         script = sigdata.witness_script;
#     102                 :        786 :         return true;
#     103                 :        786 :     }
#     104                 :       4474 :     return false;
#     105                 :       5645 : }
#     106                 :            : 
#     107                 :            : static bool GetPubKey(const SigningProvider& provider, const SignatureData& sigdata, const CKeyID& address, CPubKey& pubkey)
#     108                 :     838829 : {
#     109                 :            :     // Look for pubkey in all partial sigs
#     110                 :     838829 :     const auto it = sigdata.signatures.find(address);
#     111         [ +  + ]:     838829 :     if (it != sigdata.signatures.end()) {
#     112                 :         22 :         pubkey = it->second.first;
#     113                 :         22 :         return true;
#     114                 :         22 :     }
#     115                 :            :     // Look for pubkey in pubkey list
#     116                 :     838807 :     const auto& pk_it = sigdata.misc_pubkeys.find(address);
#     117         [ +  + ]:     838807 :     if (pk_it != sigdata.misc_pubkeys.end()) {
#     118                 :       1693 :         pubkey = pk_it->second.first;
#     119                 :       1693 :         return true;
#     120                 :       1693 :     }
#     121                 :            :     // Query the underlying provider
#     122                 :     837114 :     return provider.GetPubKey(address, pubkey);
#     123                 :     838807 : }
#     124                 :            : 
#     125                 :            : static bool CreateSig(const BaseSignatureCreator& creator, SignatureData& sigdata, const SigningProvider& provider, std::vector<unsigned char>& sig_out, const CPubKey& pubkey, const CScript& scriptcode, SigVersion sigversion)
#     126                 :     783808 : {
#     127                 :     783808 :     CKeyID keyid = pubkey.GetID();
#     128                 :     783808 :     const auto it = sigdata.signatures.find(keyid);
#     129         [ +  + ]:     783808 :     if (it != sigdata.signatures.end()) {
#     130                 :        943 :         sig_out = it->second.second;
#     131                 :        943 :         return true;
#     132                 :        943 :     }
#     133                 :     782865 :     KeyOriginInfo info;
#     134         [ +  + ]:     782865 :     if (provider.GetKeyOrigin(keyid, info)) {
#     135                 :     769694 :         sigdata.misc_pubkeys.emplace(keyid, std::make_pair(pubkey, std::move(info)));
#     136                 :     769694 :     }
#     137         [ +  + ]:     782865 :     if (creator.CreateSig(provider, sig_out, keyid, scriptcode, sigversion)) {
#     138                 :     778221 :         auto i = sigdata.signatures.emplace(keyid, SigPair(pubkey, sig_out));
#     139                 :     778221 :         assert(i.second);
#     140                 :          0 :         return true;
#     141                 :     778221 :     }
#     142                 :            :     // Could not make signature or signature not found, add keyid to missing
#     143                 :       4644 :     sigdata.missing_sigs.push_back(keyid);
#     144                 :       4644 :     return false;
#     145                 :     782865 : }
#     146                 :            : 
#     147                 :            : static bool CreateTaprootScriptSig(const BaseSignatureCreator& creator, SignatureData& sigdata, const SigningProvider& provider, std::vector<unsigned char>& sig_out, const XOnlyPubKey& pubkey, const uint256& leaf_hash, SigVersion sigversion)
#     148                 :      16402 : {
#     149                 :      16402 :     auto lookup_key = std::make_pair(pubkey, leaf_hash);
#     150                 :      16402 :     auto it = sigdata.taproot_script_sigs.find(lookup_key);
#     151         [ -  + ]:      16402 :     if (it != sigdata.taproot_script_sigs.end()) {
#     152                 :          0 :         sig_out = it->second;
#     153                 :          0 :     }
#     154         [ +  + ]:      16402 :     if (creator.CreateSchnorrSig(provider, sig_out, pubkey, &leaf_hash, nullptr, sigversion)) {
#     155                 :        179 :         sigdata.taproot_script_sigs[lookup_key] = sig_out;
#     156                 :        179 :         return true;
#     157                 :        179 :     }
#     158                 :      16223 :     return false;
#     159                 :      16402 : }
#     160                 :            : 
#     161                 :            : static bool SignTaprootScript(const SigningProvider& provider, const BaseSignatureCreator& creator, SignatureData& sigdata, int leaf_version, const CScript& script, std::vector<valtype>& result)
#     162                 :        307 : {
#     163                 :            :     // Only BIP342 tapscript signing is supported for now.
#     164         [ -  + ]:        307 :     if (leaf_version != TAPROOT_LEAF_TAPSCRIPT) return false;
#     165                 :        307 :     SigVersion sigversion = SigVersion::TAPSCRIPT;
#     166                 :            : 
#     167                 :        307 :     uint256 leaf_hash = (CHashWriter(HASHER_TAPLEAF) << uint8_t(leaf_version) << script).GetSHA256();
#     168                 :            : 
#     169                 :            :     // <xonly pubkey> OP_CHECKSIG
#     170 [ +  + ][ +  - ]:        307 :     if (script.size() == 34 && script[33] == OP_CHECKSIG && script[0] == 0x20) {
#                 [ +  - ]
#     171                 :        196 :         XOnlyPubKey pubkey{Span{script}.subspan(1, 32)};
#     172                 :        196 :         std::vector<unsigned char> sig;
#     173         [ +  + ]:        196 :         if (CreateTaprootScriptSig(creator, sigdata, provider, sig, pubkey, leaf_hash, sigversion)) {
#     174                 :         60 :             result = Vector(std::move(sig));
#     175                 :         60 :             return true;
#     176                 :         60 :         }
#     177                 :        136 :         return false;
#     178                 :        196 :     }
#     179                 :            : 
#     180                 :            :     // multi_a scripts (<key> OP_CHECKSIG <key> OP_CHECKSIGADD <key> OP_CHECKSIGADD <k> OP_NUMEQUAL)
#     181         [ +  - ]:        111 :     if (auto match = MatchMultiA(script)) {
#     182                 :        111 :         std::vector<std::vector<unsigned char>> sigs;
#     183                 :        111 :         int good_sigs = 0;
#     184         [ +  + ]:      16317 :         for (size_t i = 0; i < match->second.size(); ++i) {
#     185                 :      16206 :             XOnlyPubKey pubkey{*(match->second.rbegin() + i)};
#     186                 :      16206 :             std::vector<unsigned char> sig;
#     187                 :      16206 :             bool good_sig = CreateTaprootScriptSig(creator, sigdata, provider, sig, pubkey, leaf_hash, sigversion);
#     188 [ +  + ][ +  + ]:      16206 :             if (good_sig && good_sigs < match->first) {
#     189                 :        107 :                 ++good_sigs;
#     190                 :        107 :                 sigs.push_back(std::move(sig));
#     191                 :      16099 :             } else {
#     192                 :      16099 :                 sigs.emplace_back();
#     193                 :      16099 :             }
#     194                 :      16206 :         }
#     195         [ +  + ]:        111 :         if (good_sigs == match->first) {
#     196                 :         83 :             result = std::move(sigs);
#     197                 :         83 :             return true;
#     198                 :         83 :         }
#     199                 :         28 :         return false;
#     200                 :        111 :     }
#     201                 :            : 
#     202                 :          0 :     return false;
#     203                 :        111 : }
#     204                 :            : 
#     205                 :            : static bool SignTaproot(const SigningProvider& provider, const BaseSignatureCreator& creator, const WitnessV1Taproot& output, SignatureData& sigdata, std::vector<valtype>& result)
#     206                 :       8272 : {
#     207                 :       8272 :     TaprootSpendData spenddata;
#     208                 :            : 
#     209                 :            :     // Gather information about this output.
#     210         [ +  + ]:       8272 :     if (provider.GetTaprootSpendData(output, spenddata)) {
#     211                 :       2315 :         sigdata.tr_spenddata.Merge(spenddata);
#     212                 :       2315 :     }
#     213                 :            : 
#     214                 :            :     // Try key path spending.
#     215                 :       8272 :     {
#     216                 :       8272 :         std::vector<unsigned char> sig;
#     217         [ +  - ]:       8272 :         if (sigdata.taproot_key_path_sig.size() == 0) {
#     218         [ +  + ]:       8272 :             if (creator.CreateSchnorrSig(provider, sig, spenddata.internal_key, nullptr, &spenddata.merkle_root, SigVersion::TAPROOT)) {
#     219                 :       4709 :                 sigdata.taproot_key_path_sig = sig;
#     220                 :       4709 :             }
#     221                 :       8272 :         }
#     222         [ +  + ]:       8272 :         if (sigdata.taproot_key_path_sig.size()) {
#     223                 :       4709 :             result = Vector(sigdata.taproot_key_path_sig);
#     224                 :       4709 :             return true;
#     225                 :       4709 :         }
#     226                 :       8272 :     }
#     227                 :            : 
#     228                 :            :     // Try script path spending.
#     229                 :       3563 :     std::vector<std::vector<unsigned char>> smallest_result_stack;
#     230         [ +  + ]:       3563 :     for (const auto& [key, control_blocks] : sigdata.tr_spenddata.scripts) {
#     231                 :        307 :         const auto& [script, leaf_ver] = key;
#     232                 :        307 :         std::vector<std::vector<unsigned char>> result_stack;
#     233         [ +  + ]:        307 :         if (SignTaprootScript(provider, creator, sigdata, leaf_ver, script, result_stack)) {
#     234                 :        143 :             result_stack.emplace_back(std::begin(script), std::end(script)); // Push the script
#     235                 :        143 :             result_stack.push_back(*control_blocks.begin()); // Push the smallest control block
#     236         [ +  - ]:        143 :             if (smallest_result_stack.size() == 0 ||
#     237         [ #  # ]:        143 :                 GetSerializeSize(result_stack, PROTOCOL_VERSION) < GetSerializeSize(smallest_result_stack, PROTOCOL_VERSION)) {
#     238                 :        143 :                 smallest_result_stack = std::move(result_stack);
#     239                 :        143 :             }
#     240                 :        143 :         }
#     241                 :        307 :     }
#     242         [ +  + ]:       3563 :     if (smallest_result_stack.size() != 0) {
#     243                 :        143 :         result = std::move(smallest_result_stack);
#     244                 :        143 :         return true;
#     245                 :        143 :     }
#     246                 :            : 
#     247                 :       3420 :     return false;
#     248                 :       3563 : }
#     249                 :            : 
#     250                 :            : /**
#     251                 :            :  * Sign scriptPubKey using signature made with creator.
#     252                 :            :  * Signatures are returned in scriptSigRet (or returns false if scriptPubKey can't be signed),
#     253                 :            :  * unless whichTypeRet is TxoutType::SCRIPTHASH, in which case scriptSigRet is the redemption script.
#     254                 :            :  * Returns false if scriptPubKey could not be completely satisfied.
#     255                 :            :  */
#     256                 :            : static bool SignStep(const SigningProvider& provider, const BaseSignatureCreator& creator, const CScript& scriptPubKey,
#     257                 :            :                      std::vector<valtype>& ret, TxoutType& whichTypeRet, SigVersion sigversion, SignatureData& sigdata)
#     258                 :    1441138 : {
#     259                 :    1441138 :     CScript scriptRet;
#     260                 :    1441138 :     uint160 h160;
#     261                 :    1441138 :     ret.clear();
#     262                 :    1441138 :     std::vector<unsigned char> sig;
#     263                 :            : 
#     264                 :    1441138 :     std::vector<valtype> vSolutions;
#     265                 :    1441138 :     whichTypeRet = Solver(scriptPubKey, vSolutions);
#     266                 :            : 
#     267         [ -  + ]:    1441138 :     switch (whichTypeRet) {
#     268         [ +  + ]:       1733 :     case TxoutType::NONSTANDARD:
#     269         [ +  + ]:      49121 :     case TxoutType::NULL_DATA:
#     270         [ +  + ]:      49247 :     case TxoutType::WITNESS_UNKNOWN:
#     271                 :      49247 :         return false;
#     272         [ +  + ]:       4603 :     case TxoutType::PUBKEY:
#     273         [ +  + ]:       4603 :         if (!CreateSig(creator, sigdata, provider, sig, CPubKey(vSolutions[0]), scriptPubKey, sigversion)) return false;
#     274                 :       4507 :         ret.push_back(std::move(sig));
#     275                 :       4507 :         return true;
#     276         [ +  + ]:     838829 :     case TxoutType::PUBKEYHASH: {
#     277                 :     838829 :         CKeyID keyID = CKeyID(uint160(vSolutions[0]));
#     278                 :     838829 :         CPubKey pubkey;
#     279         [ +  + ]:     838829 :         if (!GetPubKey(provider, sigdata, keyID, pubkey)) {
#     280                 :            :             // Pubkey could not be found, add to missing
#     281                 :      75737 :             sigdata.missing_pubkeys.push_back(keyID);
#     282                 :      75737 :             return false;
#     283                 :      75737 :         }
#     284         [ +  + ]:     763092 :         if (!CreateSig(creator, sigdata, provider, sig, pubkey, scriptPubKey, sigversion)) return false;
#     285                 :     760872 :         ret.push_back(std::move(sig));
#     286                 :     760872 :         ret.push_back(ToByteVector(pubkey));
#     287                 :     760872 :         return true;
#     288                 :     763092 :     }
#     289         [ +  + ]:      12474 :     case TxoutType::SCRIPTHASH:
#     290                 :      12474 :         h160 = uint160(vSolutions[0]);
#     291         [ +  + ]:      12474 :         if (GetCScript(provider, sigdata, CScriptID{h160}, scriptRet)) {
#     292                 :      10513 :             ret.push_back(std::vector<unsigned char>(scriptRet.begin(), scriptRet.end()));
#     293                 :      10513 :             return true;
#     294                 :      10513 :         }
#     295                 :            :         // Could not find redeemScript, add to missing
#     296                 :       1961 :         sigdata.missing_redeem_script = h160;
#     297                 :       1961 :         return false;
#     298                 :            : 
#     299         [ +  + ]:       7106 :     case TxoutType::MULTISIG: {
#     300                 :       7106 :         size_t required = vSolutions.front()[0];
#     301                 :       7106 :         ret.push_back(valtype()); // workaround CHECKMULTISIG bug
#     302         [ +  + ]:      23219 :         for (size_t i = 1; i < vSolutions.size() - 1; ++i) {
#     303                 :      16113 :             CPubKey pubkey = CPubKey(vSolutions[i]);
#     304                 :            :             // We need to always call CreateSig in order to fill sigdata with all
#     305                 :            :             // possible signatures that we can create. This will allow further PSBT
#     306                 :            :             // processing to work as it needs all possible signature and pubkey pairs
#     307         [ +  + ]:      16113 :             if (CreateSig(creator, sigdata, provider, sig, pubkey, scriptPubKey, sigversion)) {
#     308         [ +  + ]:      13785 :                 if (ret.size() < required + 1) {
#     309                 :      10687 :                     ret.push_back(std::move(sig));
#     310                 :      10687 :                 }
#     311                 :      13785 :             }
#     312                 :      16113 :         }
#     313                 :       7106 :         bool ok = ret.size() == required + 1;
#     314         [ +  + ]:       8202 :         for (size_t i = 0; i + ret.size() < required + 1; ++i) {
#     315                 :       1096 :             ret.push_back(valtype());
#     316                 :       1096 :         }
#     317                 :       7106 :         return ok;
#     318                 :      12474 :     }
#     319         [ +  + ]:     511615 :     case TxoutType::WITNESS_V0_KEYHASH:
#     320                 :     511615 :         ret.push_back(vSolutions[0]);
#     321                 :     511615 :         return true;
#     322                 :            : 
#     323         [ +  + ]:       8992 :     case TxoutType::WITNESS_V0_SCRIPTHASH:
#     324                 :       8992 :         CRIPEMD160().Write(vSolutions[0].data(), vSolutions[0].size()).Finalize(h160.begin());
#     325         [ +  + ]:       8992 :         if (GetCScript(provider, sigdata, CScriptID{h160}, scriptRet)) {
#     326                 :       6479 :             ret.push_back(std::vector<unsigned char>(scriptRet.begin(), scriptRet.end()));
#     327                 :       6479 :             return true;
#     328                 :       6479 :         }
#     329                 :            :         // Could not find witnessScript, add to missing
#     330                 :       2513 :         sigdata.missing_witness_script = uint256(vSolutions[0]);
#     331                 :       2513 :         return false;
#     332                 :            : 
#     333         [ +  + ]:       8272 :     case TxoutType::WITNESS_V1_TAPROOT:
#     334                 :       8272 :         return SignTaproot(provider, creator, WitnessV1Taproot(XOnlyPubKey{vSolutions[0]}), sigdata, ret);
#     335                 :    1441138 :     } // no default case, so the compiler can warn about missing cases
#     336                 :          0 :     assert(false);
#     337                 :          0 : }
#     338                 :            : 
#     339                 :            : static CScript PushAll(const std::vector<valtype>& values)
#     340                 :     912531 : {
#     341                 :     912531 :     CScript result;
#     342         [ +  + ]:     912531 :     for (const valtype& v : values) {
#     343         [ +  + ]:     601538 :         if (v.size() == 0) {
#     344                 :       1694 :             result << OP_0;
#     345 [ -  + ][ #  # ]:     599844 :         } else if (v.size() == 1 && v[0] >= 1 && v[0] <= 16) {
#                 [ #  # ]
#     346                 :          0 :             result << CScript::EncodeOP_N(v[0]);
#     347 [ -  + ][ #  # ]:     599844 :         } else if (v.size() == 1 && v[0] == 0x81) {
#     348                 :          0 :             result << OP_1NEGATE;
#     349                 :     599844 :         } else {
#     350                 :     599844 :             result << v;
#     351                 :     599844 :         }
#     352                 :     601538 :     }
#     353                 :     912531 :     return result;
#     354                 :     912531 : }
#     355                 :            : 
#     356                 :            : bool ProduceSignature(const SigningProvider& provider, const BaseSignatureCreator& creator, const CScript& fromPubKey, SignatureData& sigdata)
#     357                 :     916339 : {
#     358         [ +  + ]:     916339 :     if (sigdata.complete) return true;
#     359                 :            : 
#     360                 :     912531 :     std::vector<valtype> result;
#     361                 :     912531 :     TxoutType whichType;
#     362                 :     912531 :     bool solved = SignStep(provider, creator, fromPubKey, result, whichType, SigVersion::BASE, sigdata);
#     363                 :     912531 :     bool P2SH = false;
#     364                 :     912531 :     CScript subscript;
#     365                 :            : 
#     366 [ +  + ][ +  + ]:     912531 :     if (solved && whichType == TxoutType::SCRIPTHASH)
#     367                 :      10513 :     {
#     368                 :            :         // Solver returns the subscript that needs to be evaluated;
#     369                 :            :         // the final scriptSig is the signatures from that
#     370                 :            :         // and then the serialized subscript:
#     371                 :      10513 :         subscript = CScript(result[0].begin(), result[0].end());
#     372                 :      10513 :         sigdata.redeem_script = subscript;
#     373 [ +  - ][ +  + ]:      10513 :         solved = solved && SignStep(provider, creator, subscript, result, whichType, SigVersion::BASE, sigdata) && whichType != TxoutType::SCRIPTHASH;
#                 [ +  - ]
#     374                 :      10513 :         P2SH = true;
#     375                 :      10513 :     }
#     376                 :            : 
#     377 [ +  + ][ +  + ]:     912531 :     if (solved && whichType == TxoutType::WITNESS_V0_KEYHASH)
#     378                 :     511615 :     {
#     379                 :     511615 :         CScript witnessscript;
#     380                 :     511615 :         witnessscript << OP_DUP << OP_HASH160 << ToByteVector(result[0]) << OP_EQUALVERIFY << OP_CHECKSIG;
#     381                 :     511615 :         TxoutType subType;
#     382 [ +  - ][ +  + ]:     511615 :         solved = solved && SignStep(provider, creator, witnessscript, result, subType, SigVersion::WITNESS_V0, sigdata);
#     383                 :     511615 :         sigdata.scriptWitness.stack = result;
#     384                 :     511615 :         sigdata.witness = true;
#     385                 :     511615 :         result.clear();
#     386                 :     511615 :     }
#     387 [ +  + ][ +  + ]:     400916 :     else if (solved && whichType == TxoutType::WITNESS_V0_SCRIPTHASH)
#     388                 :       6479 :     {
#     389                 :       6479 :         CScript witnessscript(result[0].begin(), result[0].end());
#     390                 :       6479 :         sigdata.witness_script = witnessscript;
#     391                 :       6479 :         TxoutType subType;
#     392 [ +  - ][ +  + ]:       6479 :         solved = solved && SignStep(provider, creator, witnessscript, result, subType, SigVersion::WITNESS_V0, sigdata) && subType != TxoutType::SCRIPTHASH && subType != TxoutType::WITNESS_V0_SCRIPTHASH && subType != TxoutType::WITNESS_V0_KEYHASH;
#         [ +  - ][ +  - ]
#                 [ +  - ]
#     393                 :       6479 :         result.push_back(std::vector<unsigned char>(witnessscript.begin(), witnessscript.end()));
#     394                 :       6479 :         sigdata.scriptWitness.stack = result;
#     395                 :       6479 :         sigdata.witness = true;
#     396                 :       6479 :         result.clear();
#     397 [ +  + ][ +  - ]:     394437 :     } else if (whichType == TxoutType::WITNESS_V1_TAPROOT && !P2SH) {
#     398                 :       8272 :         sigdata.witness = true;
#     399         [ +  + ]:       8272 :         if (solved) {
#     400                 :       4852 :             sigdata.scriptWitness.stack = std::move(result);
#     401                 :       4852 :         }
#     402                 :       8272 :         result.clear();
#     403 [ +  + ][ -  + ]:     386165 :     } else if (solved && whichType == TxoutType::WITNESS_UNKNOWN) {
#     404                 :          0 :         sigdata.witness = true;
#     405                 :          0 :     }
#     406                 :            : 
#     407         [ +  + ]:     912531 :     if (!sigdata.witness) sigdata.scriptWitness.stack.clear();
#     408         [ +  + ]:     912531 :     if (P2SH) {
#     409                 :      10513 :         result.push_back(std::vector<unsigned char>(subscript.begin(), subscript.end()));
#     410                 :      10513 :     }
#     411                 :     912531 :     sigdata.scriptSig = PushAll(result);
#     412                 :            : 
#     413                 :            :     // Test solution
#     414 [ +  + ][ +  + ]:     912531 :     sigdata.complete = solved && VerifyScript(sigdata.scriptSig, fromPubKey, &sigdata.scriptWitness, STANDARD_SCRIPT_VERIFY_FLAGS, creator.Checker());
#     415                 :     912531 :     return sigdata.complete;
#     416                 :     916339 : }
#     417                 :            : 
#     418                 :            : namespace {
#     419                 :            : class SignatureExtractorChecker final : public DeferringSignatureChecker
#     420                 :            : {
#     421                 :            : private:
#     422                 :            :     SignatureData& sigdata;
#     423                 :            : 
#     424                 :            : public:
#     425                 :      76549 :     SignatureExtractorChecker(SignatureData& sigdata, BaseSignatureChecker& checker) : DeferringSignatureChecker(checker), sigdata(sigdata) {}
#     426                 :            : 
#     427                 :            :     bool CheckECDSASignature(const std::vector<unsigned char>& scriptSig, const std::vector<unsigned char>& vchPubKey, const CScript& scriptCode, SigVersion sigversion) const override
#     428                 :       4226 :     {
#     429         [ +  + ]:       4226 :         if (m_checker.CheckECDSASignature(scriptSig, vchPubKey, scriptCode, sigversion)) {
#     430                 :       3812 :             CPubKey pubkey(vchPubKey);
#     431                 :       3812 :             sigdata.signatures.emplace(pubkey.GetID(), SigPair(pubkey, scriptSig));
#     432                 :       3812 :             return true;
#     433                 :       3812 :         }
#     434                 :        414 :         return false;
#     435                 :       4226 :     }
#     436                 :            : };
#     437                 :            : 
#     438                 :            : struct Stacks
#     439                 :            : {
#     440                 :            :     std::vector<valtype> script;
#     441                 :            :     std::vector<valtype> witness;
#     442                 :            : 
#     443                 :            :     Stacks() = delete;
#     444                 :            :     Stacks(const Stacks&) = delete;
#     445                 :      76549 :     explicit Stacks(const SignatureData& data) : witness(data.scriptWitness.stack) {
#     446                 :      76549 :         EvalScript(script, data.scriptSig, SCRIPT_VERIFY_STRICTENC, BaseSignatureChecker(), SigVersion::BASE);
#     447                 :      76549 :     }
#     448                 :            : };
#     449                 :            : }
#     450                 :            : 
#     451                 :            : // Extracts signatures and scripts from incomplete scriptSigs. Please do not extend this, use PSBT instead
#     452                 :            : SignatureData DataFromTransaction(const CMutableTransaction& tx, unsigned int nIn, const CTxOut& txout)
#     453                 :      76549 : {
#     454                 :      76549 :     SignatureData data;
#     455                 :      76549 :     assert(tx.vin.size() > nIn);
#     456                 :          0 :     data.scriptSig = tx.vin[nIn].scriptSig;
#     457                 :      76549 :     data.scriptWitness = tx.vin[nIn].scriptWitness;
#     458                 :      76549 :     Stacks stack(data);
#     459                 :            : 
#     460                 :            :     // Get signatures
#     461                 :      76549 :     MutableTransactionSignatureChecker tx_checker(&tx, nIn, txout.nValue, MissingDataBehavior::FAIL);
#     462                 :      76549 :     SignatureExtractorChecker extractor_checker(data, tx_checker);
#     463         [ +  + ]:      76549 :     if (VerifyScript(data.scriptSig, txout.scriptPubKey, &data.scriptWitness, STANDARD_SCRIPT_VERIFY_FLAGS, extractor_checker)) {
#     464                 :       3802 :         data.complete = true;
#     465                 :       3802 :         return data;
#     466                 :       3802 :     }
#     467                 :            : 
#     468                 :            :     // Get scripts
#     469                 :      72747 :     std::vector<std::vector<unsigned char>> solutions;
#     470                 :      72747 :     TxoutType script_type = Solver(txout.scriptPubKey, solutions);
#     471                 :      72747 :     SigVersion sigversion = SigVersion::BASE;
#     472                 :      72747 :     CScript next_script = txout.scriptPubKey;
#     473                 :            : 
#     474 [ +  + ][ +  + ]:      72747 :     if (script_type == TxoutType::SCRIPTHASH && !stack.script.empty() && !stack.script.back().empty()) {
#                 [ +  - ]
#     475                 :            :         // Get the redeemScript
#     476                 :         16 :         CScript redeem_script(stack.script.back().begin(), stack.script.back().end());
#     477                 :         16 :         data.redeem_script = redeem_script;
#     478                 :         16 :         next_script = std::move(redeem_script);
#     479                 :            : 
#     480                 :            :         // Get redeemScript type
#     481                 :         16 :         script_type = Solver(next_script, solutions);
#     482                 :         16 :         stack.script.pop_back();
#     483                 :         16 :     }
#     484 [ +  + ][ +  + ]:      72747 :     if (script_type == TxoutType::WITNESS_V0_SCRIPTHASH && !stack.witness.empty() && !stack.witness.back().empty()) {
#                 [ +  - ]
#     485                 :            :         // Get the witnessScript
#     486                 :         21 :         CScript witness_script(stack.witness.back().begin(), stack.witness.back().end());
#     487                 :         21 :         data.witness_script = witness_script;
#     488                 :         21 :         next_script = std::move(witness_script);
#     489                 :            : 
#     490                 :            :         // Get witnessScript type
#     491                 :         21 :         script_type = Solver(next_script, solutions);
#     492                 :         21 :         stack.witness.pop_back();
#     493                 :         21 :         stack.script = std::move(stack.witness);
#     494                 :         21 :         stack.witness.clear();
#     495                 :         21 :         sigversion = SigVersion::WITNESS_V0;
#     496                 :         21 :     }
#     497 [ +  + ][ +  + ]:      72747 :     if (script_type == TxoutType::MULTISIG && !stack.script.empty()) {
#     498                 :            :         // Build a map of pubkey -> signature by matching sigs to pubkeys:
#     499                 :         33 :         assert(solutions.size() > 1);
#     500                 :          0 :         unsigned int num_pubkeys = solutions.size()-2;
#     501                 :         33 :         unsigned int last_success_key = 0;
#     502         [ +  + ]:        105 :         for (const valtype& sig : stack.script) {
#     503         [ +  + ]:        252 :             for (unsigned int i = last_success_key; i < num_pubkeys; ++i) {
#     504                 :        186 :                 const valtype& pubkey = solutions[i+1];
#     505                 :            :                 // We either have a signature for this pubkey, or we have found a signature and it is valid
#     506 [ -  + ][ +  + ]:        186 :                 if (data.signatures.count(CPubKey(pubkey).GetID()) || extractor_checker.CheckECDSASignature(sig, pubkey, next_script, sigversion)) {
#                 [ +  + ]
#     507                 :         39 :                     last_success_key = i + 1;
#     508                 :         39 :                     break;
#     509                 :         39 :                 }
#     510                 :        186 :             }
#     511                 :        105 :         }
#     512                 :         33 :     }
#     513                 :            : 
#     514                 :          0 :     return data;
#     515                 :      76549 : }
#     516                 :            : 
#     517                 :            : void UpdateInput(CTxIn& input, const SignatureData& data)
#     518                 :     458573 : {
#     519                 :     458573 :     input.scriptSig = data.scriptSig;
#     520                 :     458573 :     input.scriptWitness = data.scriptWitness;
#     521                 :     458573 : }
#     522                 :            : 
#     523                 :            : void SignatureData::MergeSignatureData(SignatureData sigdata)
#     524                 :         78 : {
#     525         [ +  + ]:         78 :     if (complete) return;
#     526         [ +  + ]:         68 :     if (sigdata.complete) {
#     527                 :         16 :         *this = std::move(sigdata);
#     528                 :         16 :         return;
#     529                 :         16 :     }
#     530 [ +  + ][ -  + ]:         52 :     if (redeem_script.empty() && !sigdata.redeem_script.empty()) {
#     531                 :          0 :         redeem_script = sigdata.redeem_script;
#     532                 :          0 :     }
#     533 [ +  + ][ +  + ]:         52 :     if (witness_script.empty() && !sigdata.witness_script.empty()) {
#     534                 :          1 :         witness_script = sigdata.witness_script;
#     535                 :          1 :     }
#     536                 :         52 :     signatures.insert(std::make_move_iterator(sigdata.signatures.begin()), std::make_move_iterator(sigdata.signatures.end()));
#     537                 :         52 : }
#     538                 :            : 
#     539                 :            : bool SignSignature(const SigningProvider &provider, const CScript& fromPubKey, CMutableTransaction& txTo, unsigned int nIn, const CAmount& amount, int nHashType)
#     540                 :       9214 : {
#     541                 :       9214 :     assert(nIn < txTo.vin.size());
#     542                 :            : 
#     543                 :          0 :     MutableTransactionSignatureCreator creator(&txTo, nIn, amount, nHashType);
#     544                 :            : 
#     545                 :       9214 :     SignatureData sigdata;
#     546                 :       9214 :     bool ret = ProduceSignature(provider, creator, fromPubKey, sigdata);
#     547                 :       9214 :     UpdateInput(txTo.vin.at(nIn), sigdata);
#     548                 :       9214 :     return ret;
#     549                 :       9214 : }
#     550                 :            : 
#     551                 :            : bool SignSignature(const SigningProvider &provider, const CTransaction& txFrom, CMutableTransaction& txTo, unsigned int nIn, int nHashType)
#     552                 :        214 : {
#     553                 :        214 :     assert(nIn < txTo.vin.size());
#     554                 :          0 :     const CTxIn& txin = txTo.vin[nIn];
#     555                 :        214 :     assert(txin.prevout.n < txFrom.vout.size());
#     556                 :          0 :     const CTxOut& txout = txFrom.vout[txin.prevout.n];
#     557                 :            : 
#     558                 :        214 :     return SignSignature(provider, txout.scriptPubKey, txTo, nIn, txout.nValue, nHashType);
#     559                 :        214 : }
#     560                 :            : 
#     561                 :            : namespace {
#     562                 :            : /** Dummy signature checker which accepts all signatures. */
#     563                 :            : class DummySignatureChecker final : public BaseSignatureChecker
#     564                 :            : {
#     565                 :            : public:
#     566                 :        893 :     DummySignatureChecker() {}
#     567                 :    1106226 :     bool CheckECDSASignature(const std::vector<unsigned char>& scriptSig, const std::vector<unsigned char>& vchPubKey, const CScript& scriptCode, SigVersion sigversion) const override { return true; }
#     568                 :       5468 :     bool CheckSchnorrSignature(Span<const unsigned char> sig, Span<const unsigned char> pubkey, SigVersion sigversion, ScriptExecutionData& execdata, ScriptError* serror) const override { return true; }
#     569                 :            : };
#     570                 :            : const DummySignatureChecker DUMMY_CHECKER;
#     571                 :            : 
#     572                 :            : class DummySignatureCreator final : public BaseSignatureCreator {
#     573                 :            : private:
#     574                 :            :     char m_r_len = 32;
#     575                 :            :     char m_s_len = 32;
#     576                 :            : public:
#     577                 :       1786 :     DummySignatureCreator(char r_len, char s_len) : m_r_len(r_len), m_s_len(s_len) {}
#     578                 :     740625 :     const BaseSignatureChecker& Checker() const override { return DUMMY_CHECKER; }
#     579                 :            :     bool CreateSig(const SigningProvider& provider, std::vector<unsigned char>& vchSig, const CKeyID& keyid, const CScript& scriptCode, SigVersion sigversion) const override
#     580                 :     742036 :     {
#     581                 :            :         // Create a dummy signature that is a valid DER-encoding
#     582                 :     742036 :         vchSig.assign(m_r_len + m_s_len + 7, '\000');
#     583                 :     742036 :         vchSig[0] = 0x30;
#     584                 :     742036 :         vchSig[1] = m_r_len + m_s_len + 4;
#     585                 :     742036 :         vchSig[2] = 0x02;
#     586                 :     742036 :         vchSig[3] = m_r_len;
#     587                 :     742036 :         vchSig[4] = 0x01;
#     588                 :     742036 :         vchSig[4 + m_r_len] = 0x02;
#     589                 :     742036 :         vchSig[5 + m_r_len] = m_s_len;
#     590                 :     742036 :         vchSig[6 + m_r_len] = 0x01;
#     591                 :     742036 :         vchSig[6 + m_r_len + m_s_len] = SIGHASH_ALL;
#     592                 :     742036 :         return true;
#     593                 :     742036 :     }
#     594                 :            :     bool CreateSchnorrSig(const SigningProvider& provider, std::vector<unsigned char>& sig, const XOnlyPubKey& pubkey, const uint256* leaf_hash, const uint256* tweak, SigVersion sigversion) const override
#     595                 :       4601 :     {
#     596                 :       4601 :         sig.assign(64, '\000');
#     597                 :       4601 :         return true;
#     598                 :       4601 :     }
#     599                 :            : };
#     600                 :            : 
#     601                 :            : }
#     602                 :            : 
#     603                 :            : const BaseSignatureCreator& DUMMY_SIGNATURE_CREATOR = DummySignatureCreator(32, 32);
#     604                 :            : const BaseSignatureCreator& DUMMY_MAXIMUM_SIGNATURE_CREATOR = DummySignatureCreator(33, 32);
#     605                 :            : 
#     606                 :            : bool IsSolvable(const SigningProvider& provider, const CScript& script)
#     607                 :     365204 : {
#     608                 :            :     // This check is to make sure that the script we created can actually be solved for and signed by us
#     609                 :            :     // if we were to have the private keys. This is just to make sure that the script is valid and that,
#     610                 :            :     // if found in a transaction, we would still accept and relay that transaction. In particular,
#     611                 :            :     // it will reject witness outputs that require signing with an uncompressed public key.
#     612                 :     365204 :     SignatureData sigs;
#     613                 :            :     // Make sure that STANDARD_SCRIPT_VERIFY_FLAGS includes SCRIPT_VERIFY_WITNESS_PUBKEYTYPE, the most
#     614                 :            :     // important property this function is designed to test for.
#     615                 :     365204 :     static_assert(STANDARD_SCRIPT_VERIFY_FLAGS & SCRIPT_VERIFY_WITNESS_PUBKEYTYPE, "IsSolvable requires standard script flags to include WITNESS_PUBKEYTYPE");
#     616         [ +  + ]:     365204 :     if (ProduceSignature(provider, DUMMY_SIGNATURE_CREATOR, script, sigs)) {
#     617                 :            :         // VerifyScript check is just defensive, and should never fail.
#     618                 :     365016 :         bool verified = VerifyScript(sigs.scriptSig, script, &sigs.scriptWitness, STANDARD_SCRIPT_VERIFY_FLAGS, DUMMY_CHECKER);
#     619                 :     365016 :         assert(verified);
#     620                 :          0 :         return true;
#     621                 :     365016 :     }
#     622                 :        188 :     return false;
#     623                 :     365204 : }
#     624                 :            : 
#     625                 :            : bool IsSegWitOutput(const SigningProvider& provider, const CScript& script)
#     626                 :         12 : {
#     627                 :         12 :     int version;
#     628                 :         12 :     valtype program;
#     629         [ +  + ]:         12 :     if (script.IsWitnessProgram(version, program)) return true;
#     630         [ +  + ]:          8 :     if (script.IsPayToScriptHash()) {
#     631                 :          4 :         std::vector<valtype> solutions;
#     632                 :          4 :         auto whichtype = Solver(script, solutions);
#     633         [ +  - ]:          4 :         if (whichtype == TxoutType::SCRIPTHASH) {
#     634                 :          4 :             auto h160 = uint160(solutions[0]);
#     635                 :          4 :             CScript subscript;
#     636         [ +  + ]:          4 :             if (provider.GetCScript(CScriptID{h160}, subscript)) {
#     637         [ +  - ]:          2 :                 if (subscript.IsWitnessProgram(version, program)) return true;
#     638                 :          2 :             }
#     639                 :          4 :         }
#     640                 :          4 :     }
#     641                 :          6 :     return false;
#     642                 :          8 : }
#     643                 :            : 
#     644                 :            : bool SignTransaction(CMutableTransaction& mtx, const SigningProvider* keystore, const std::map<COutPoint, Coin>& coins, int nHashType, std::map<int, bilingual_str>& input_errors)
#     645                 :      18178 : {
#     646                 :      18178 :     bool fHashSingle = ((nHashType & ~SIGHASH_ANYONECANPAY) == SIGHASH_SINGLE);
#     647                 :            : 
#     648                 :            :     // Use CTransaction for the constant parts of the
#     649                 :            :     // transaction to avoid rehashing.
#     650                 :      18178 :     const CTransaction txConst(mtx);
#     651                 :            : 
#     652                 :      18178 :     PrecomputedTransactionData txdata;
#     653                 :      18178 :     std::vector<CTxOut> spent_outputs;
#     654         [ +  + ]:      94699 :     for (unsigned int i = 0; i < mtx.vin.size(); ++i) {
#     655                 :      76543 :         CTxIn& txin = mtx.vin[i];
#     656                 :      76543 :         auto coin = coins.find(txin.prevout);
#     657 [ +  + ][ -  + ]:      76543 :         if (coin == coins.end() || coin->second.IsSpent()) {
#                 [ +  + ]
#     658                 :         22 :             txdata.Init(txConst, /*spent_outputs=*/{}, /*force=*/true);
#     659                 :         22 :             break;
#     660                 :      76521 :         } else {
#     661                 :      76521 :             spent_outputs.emplace_back(coin->second.out.nValue, coin->second.out.scriptPubKey);
#     662                 :      76521 :         }
#     663                 :      76543 :     }
#     664         [ +  + ]:      18178 :     if (spent_outputs.size() == mtx.vin.size()) {
#     665                 :      18156 :         txdata.Init(txConst, std::move(spent_outputs), true);
#     666                 :      18156 :     }
#     667                 :            : 
#     668                 :            :     // Sign what we can:
#     669         [ +  + ]:      94731 :     for (unsigned int i = 0; i < mtx.vin.size(); ++i) {
#     670                 :      76553 :         CTxIn& txin = mtx.vin[i];
#     671                 :      76553 :         auto coin = coins.find(txin.prevout);
#     672 [ -  + ][ +  + ]:      76553 :         if (coin == coins.end() || coin->second.IsSpent()) {
#                 [ +  + ]
#     673                 :         32 :             input_errors[i] = _("Input not found or already spent");
#     674                 :         32 :             continue;
#     675                 :         32 :         }
#     676                 :      76521 :         const CScript& prevPubKey = coin->second.out.scriptPubKey;
#     677                 :      76521 :         const CAmount& amount = coin->second.out.nValue;
#     678                 :            : 
#     679                 :      76521 :         SignatureData sigdata = DataFromTransaction(mtx, i, coin->second.out);
#     680                 :            :         // Only sign SIGHASH_SINGLE if there's a corresponding output:
#     681 [ +  - ][ #  # ]:      76521 :         if (!fHashSingle || (i < mtx.vout.size())) {
#     682                 :      76521 :             ProduceSignature(*keystore, MutableTransactionSignatureCreator(&mtx, i, amount, &txdata, nHashType), prevPubKey, sigdata);
#     683                 :      76521 :         }
#     684                 :            : 
#     685                 :      76521 :         UpdateInput(txin, sigdata);
#     686                 :            : 
#     687                 :            :         // amount must be specified for valid segwit signature
#     688 [ +  + ][ +  + ]:      76521 :         if (amount == MAX_MONEY && !txin.scriptWitness.IsNull()) {
#     689                 :         17 :             input_errors[i] = _("Missing amount");
#     690                 :         17 :             continue;
#     691                 :         17 :         }
#     692                 :            : 
#     693                 :      76504 :         ScriptError serror = SCRIPT_ERR_OK;
#     694         [ +  + ]:      76504 :         if (!VerifyScript(txin.scriptSig, prevPubKey, &txin.scriptWitness, STANDARD_SCRIPT_VERIFY_FLAGS, TransactionSignatureChecker(&txConst, i, amount, txdata, MissingDataBehavior::FAIL), &serror)) {
#     695         [ +  + ]:      46935 :             if (serror == SCRIPT_ERR_INVALID_STACK_OPERATION) {
#     696                 :            :                 // Unable to sign input and verification failed (possible attempt to partially sign).
#     697                 :      34245 :                 input_errors[i] = Untranslated("Unable to sign input, invalid stack size (possibly missing key)");
#     698         [ +  + ]:      34245 :             } else if (serror == SCRIPT_ERR_SIG_NULLFAIL) {
#     699                 :            :                 // Verification failed (possibly due to insufficient signatures).
#     700                 :         41 :                 input_errors[i] = Untranslated("CHECK(MULTI)SIG failing with non-zero signature (possibly need more signatures)");
#     701                 :      12649 :             } else {
#     702                 :      12649 :                 input_errors[i] = Untranslated(ScriptErrorString(serror));
#     703                 :      12649 :             }
#     704                 :      46935 :         } else {
#     705                 :            :             // If this input succeeds, make sure there is no error set for it
#     706                 :      29569 :             input_errors.erase(i);
#     707                 :      29569 :         }
#     708                 :      76504 :     }
#     709                 :      18178 :     return input_errors.empty();
#     710                 :      18178 : }

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