/** * Return public keys or hashes from scriptPubKey, for 'standard' transaction types. */ bool Solver(const CScript& scriptPubKeyIn, txnouttype& typeRet, std::vector<std::vector<unsigned char> >& vSolutionsRet) { // Templates static std::multimap<txnouttype, CScript> mTemplates; if (mTemplates.empty()) { // Standard tx, sender provides pubkey, receiver adds signature mTemplates.insert(std::make_pair(TX_PUBKEY, CScript() << OP_PUBKEY << OP_CHECKSIG)); // Syscoin address tx, sender provides hash of pubkey, receiver provides signature and pubkey mTemplates.insert(std::make_pair(TX_PUBKEYHASH, CScript() << OP_DUP << OP_HASH160 << OP_PUBKEYHASH << OP_EQUALVERIFY << OP_CHECKSIG)); // Sender provides N pubkeys, receivers provides M signatures mTemplates.insert(std::make_pair(TX_MULTISIG, CScript() << OP_SMALLINTEGER << OP_PUBKEYS << OP_SMALLINTEGER << OP_CHECKMULTISIG)); } // SYSCOIN check to see if this is a syscoin service transaction, if so get the scriptPubKey by extracting service specific script information CScript scriptPubKey; CScript scriptPubKeyOut; if (RemoveSyscoinScript(scriptPubKeyIn, scriptPubKeyOut)) scriptPubKey = scriptPubKeyOut; else scriptPubKey = scriptPubKeyIn; vSolutionsRet.clear(); // Shortcut for pay-to-script-hash, which are more constrained than the other types: // it is always OP_HASH160 20 [20 byte hash] OP_EQUAL if (scriptPubKey.IsPayToScriptHash()) { typeRet = TX_SCRIPTHASH; std::vector<unsigned char> hashBytes(scriptPubKey.begin()+2, scriptPubKey.begin()+22); vSolutionsRet.push_back(hashBytes); return true; } // Provably prunable, data-carrying output // // So long as script passes the IsUnspendable() test and all but the first // byte passes the IsPushOnly() test we don't care what exactly is in the // script. if (scriptPubKey.size() >= 1 && scriptPubKey[0] == OP_RETURN && scriptPubKey.IsPushOnly(scriptPubKey.begin()+1)) { typeRet = TX_NULL_DATA; return true; } // Scan templates const CScript& script1 = scriptPubKey; BOOST_FOREACH(const PAIRTYPE(txnouttype, CScript)& tplate, mTemplates) { const CScript& script2 = tplate.second; vSolutionsRet.clear(); opcodetype opcode1, opcode2; std::vector<unsigned char> vch1, vch2; // Compare CScript::const_iterator pc1 = script1.begin(); CScript::const_iterator pc2 = script2.begin(); while (true) { if (pc1 == script1.end() && pc2 == script2.end()) { // Found a match typeRet = tplate.first; if (typeRet == TX_MULTISIG) { // Additional checks for TX_MULTISIG: unsigned char m = vSolutionsRet.front()[0]; unsigned char n = vSolutionsRet.back()[0]; if (m < 1 || n < 1 || m > n || vSolutionsRet.size()-2 != n) return false; } return true; } if (!script1.GetOp(pc1, opcode1, vch1)) break; if (!script2.GetOp(pc2, opcode2, vch2)) break; // Template matching opcodes: if (opcode2 == OP_PUBKEYS) { while (vch1.size() >= 33 && vch1.size() <= 65) { vSolutionsRet.push_back(vch1); if (!script1.GetOp(pc1, opcode1, vch1)) break; } if (!script2.GetOp(pc2, opcode2, vch2)) break; // Normal situation is to fall through // to other if/else statements } if (opcode2 == OP_PUBKEY) { if (vch1.size() < 33 || vch1.size() > 65) break; vSolutionsRet.push_back(vch1); } else if (opcode2 == OP_PUBKEYHASH) { if (vch1.size() != sizeof(uint160)) break; vSolutionsRet.push_back(vch1); } else if (opcode2 == OP_SMALLINTEGER) { // Single-byte small integer pushed onto vSolutions if (opcode1 == OP_0 || (opcode1 >= OP_1 && opcode1 <= OP_16)) { char n = (char)CScript::DecodeOP_N(opcode1); vSolutionsRet.push_back(valtype(1, n)); } else break; } else if (opcode1 != opcode2 || vch1 != vch2) { // Others must match exactly break; } } } vSolutionsRet.clear(); typeRet = TX_NONSTANDARD; return false; }
bool Solver(const CScript& scriptPubKey, txnouttype& typeRet, std::vector<std::vector<unsigned char> >& vSolutionsRet) { // Templates static std::multimap<txnouttype, CScript> mTemplates; if (mTemplates.empty()) { // Standard tx, sender provides pubkey, receiver adds signature mTemplates.insert(std::make_pair(TX_PUBKEY, CScript() << OP_PUBKEY << OP_CHECKSIG)); // Bitcoin address tx, sender provides hash of pubkey, receiver provides signature and pubkey mTemplates.insert(std::make_pair(TX_PUBKEYHASH, CScript() << OP_DUP << OP_HASH160 << OP_PUBKEYHASH << OP_EQUALVERIFY << OP_CHECKSIG)); // Sender provides N pubkeys, receivers provides M signatures mTemplates.insert(std::make_pair(TX_MULTISIG, CScript() << OP_SMALLINTEGER << OP_PUBKEYS << OP_SMALLINTEGER << OP_CHECKMULTISIG)); } vSolutionsRet.clear(); // If we have a name script, strip the prefix const CNameScript nameOp(scriptPubKey); const CScript& script1 = nameOp.getAddress(); // Shortcut for pay-to-script-hash, which are more constrained than the other types: // it is always OP_HASH160 20 [20 byte hash] OP_EQUAL if (script1.IsPayToScriptHash(false)) { typeRet = TX_SCRIPTHASH; std::vector<unsigned char> hashBytes(script1.begin()+2, script1.begin()+22); vSolutionsRet.push_back(hashBytes); return true; } int witnessversion; std::vector<unsigned char> witnessprogram; if (scriptPubKey.IsWitnessProgram(witnessversion, witnessprogram)) { if (witnessversion == 0 && witnessprogram.size() == 20) { typeRet = TX_WITNESS_V0_KEYHASH; vSolutionsRet.push_back(witnessprogram); return true; } if (witnessversion == 0 && witnessprogram.size() == 32) { typeRet = TX_WITNESS_V0_SCRIPTHASH; vSolutionsRet.push_back(witnessprogram); return true; } if (witnessversion != 0) { typeRet = TX_WITNESS_UNKNOWN; vSolutionsRet.push_back(std::vector<unsigned char>{(unsigned char)witnessversion}); vSolutionsRet.push_back(std::move(witnessprogram)); return true; } return false; } // Provably prunable, data-carrying output // // So long as script passes the IsUnspendable() test and all but the first // byte passes the IsPushOnly() test we don't care what exactly is in the // script. if (scriptPubKey.size() >= 1 && scriptPubKey[0] == OP_RETURN && scriptPubKey.IsPushOnly(scriptPubKey.begin()+1)) { typeRet = TX_NULL_DATA; return true; } // Scan templates for (const std::pair<txnouttype, CScript>& tplate : mTemplates) { const CScript& script2 = tplate.second; vSolutionsRet.clear(); opcodetype opcode1, opcode2; std::vector<unsigned char> vch1, vch2; // Compare CScript::const_iterator pc1 = script1.begin(); CScript::const_iterator pc2 = script2.begin(); while (true) { if (pc1 == script1.end() && pc2 == script2.end()) { // Found a match typeRet = tplate.first; if (typeRet == TX_MULTISIG) { // Additional checks for TX_MULTISIG: unsigned char m = vSolutionsRet.front()[0]; unsigned char n = vSolutionsRet.back()[0]; if (m < 1 || n < 1 || m > n || vSolutionsRet.size()-2 != n) return false; } return true; } if (!script1.GetOp(pc1, opcode1, vch1)) break; if (!script2.GetOp(pc2, opcode2, vch2)) break; // Template matching opcodes: if (opcode2 == OP_PUBKEYS) { while (vch1.size() >= 33 && vch1.size() <= 65) { vSolutionsRet.push_back(vch1); if (!script1.GetOp(pc1, opcode1, vch1)) break; } if (!script2.GetOp(pc2, opcode2, vch2)) break; // Normal situation is to fall through // to other if/else statements } if (opcode2 == OP_PUBKEY) { if (vch1.size() < 33 || vch1.size() > 65) break; vSolutionsRet.push_back(vch1); } else if (opcode2 == OP_PUBKEYHASH) { if (vch1.size() != sizeof(uint160)) break; vSolutionsRet.push_back(vch1); } else if (opcode2 == OP_SMALLINTEGER) { // Single-byte small integer pushed onto vSolutions if (opcode1 == OP_0 || (opcode1 >= OP_1 && opcode1 <= OP_16)) { char n = (char)CScript::DecodeOP_N(opcode1); vSolutionsRet.push_back(valtype(1, n)); } else break; } else if (opcode1 != opcode2 || vch1 != vch2) { // Others must match exactly break; } } } vSolutionsRet.clear(); typeRet = TX_NONSTANDARD; return false; }
bool Solver(const CScript& scriptPubKey, txnouttype& typeRet, std::vector<std::vector<unsigned char> >& vSolutionsRet) { vSolutionsRet.clear(); // Shortcut for pay-to-script-hash, which are more constrained than the other types: // it is always OP_HASH160 20 [20 byte hash] OP_EQUAL if (scriptPubKey.IsPayToScriptHash()) { typeRet = TX_SCRIPTHASH; std::vector<unsigned char> hashBytes(scriptPubKey.begin()+2, scriptPubKey.begin()+22); vSolutionsRet.push_back(hashBytes); return true; } int witnessversion; std::vector<unsigned char> witnessprogram; if (scriptPubKey.IsWitnessProgram(witnessversion, witnessprogram)) { if (witnessversion == 0 && witnessprogram.size() == WITNESS_V0_KEYHASH_SIZE) { typeRet = TX_WITNESS_V0_KEYHASH; vSolutionsRet.push_back(witnessprogram); return true; } if (witnessversion == 0 && witnessprogram.size() == WITNESS_V0_SCRIPTHASH_SIZE) { typeRet = TX_WITNESS_V0_SCRIPTHASH; vSolutionsRet.push_back(witnessprogram); return true; } if (witnessversion != 0) { typeRet = TX_WITNESS_UNKNOWN; vSolutionsRet.push_back(std::vector<unsigned char>{(unsigned char)witnessversion}); vSolutionsRet.push_back(std::move(witnessprogram)); return true; } typeRet = TX_NONSTANDARD; return false; } // Provably prunable, data-carrying output // // So long as script passes the IsUnspendable() test and all but the first // byte passes the IsPushOnly() test we don't care what exactly is in the // script. if (scriptPubKey.size() >= 1 && scriptPubKey[0] == OP_RETURN && scriptPubKey.IsPushOnly(scriptPubKey.begin()+1)) { typeRet = TX_NULL_DATA; return true; } std::vector<unsigned char> data; if (MatchPayToPubkey(scriptPubKey, data)) { typeRet = TX_PUBKEY; vSolutionsRet.push_back(std::move(data)); return true; } if (MatchPayToPubkeyHash(scriptPubKey, data)) { typeRet = TX_PUBKEYHASH; vSolutionsRet.push_back(std::move(data)); return true; } unsigned int required; std::vector<std::vector<unsigned char>> keys; if (MatchMultisig(scriptPubKey, required, keys)) { typeRet = TX_MULTISIG; vSolutionsRet.push_back({static_cast<unsigned char>(required)}); // safe as required is in range 1..16 vSolutionsRet.insert(vSolutionsRet.end(), keys.begin(), keys.end()); vSolutionsRet.push_back({static_cast<unsigned char>(keys.size())}); // safe as size is in range 1..16 return true; } vSolutionsRet.clear(); typeRet = TX_NONSTANDARD; return false; }