Page MenuHomePhabricator
Differential D4933 Diff 15496 src/script/standard.cpp

Changeset View

Standalone View

View Options

src/script/standard.cpp

Show First 20 Lines • Show All 92 Lines • ▼ Show 20 Linesstatic bool MatchMultisig(const CScript &script, unsigned int &required,
} }
unsigned int keys = CScript::DecodeOP_N(opcode); unsigned int keys = CScript::DecodeOP_N(opcode);
if (pubkeys.size() != keys || keys < required) { if (pubkeys.size() != keys || keys < required) {
return false; return false;
} }
return (it + 1 == script.end()); return (it + 1 == script.end());
} }
bool Solver(const CScript &scriptPubKey, txnouttype &typeRet, txnouttype Solver(const CScript &scriptPubKey,
std::vector<std::vector<uint8_t>> &vSolutionsRet) { std::vector<std::vector<uint8_t>> &vSolutionsRet) {
vSolutionsRet.clear(); vSolutionsRet.clear();
// Shortcut for pay-to-script-hash, which are more constrained than the // Shortcut for pay-to-script-hash, which are more constrained than the
// other types: // other types:
// it is always OP_HASH160 20 [20 byte hash] OP_EQUAL // it is always OP_HASH160 20 [20 byte hash] OP_EQUAL
if (scriptPubKey.IsPayToScriptHash()) { if (scriptPubKey.IsPayToScriptHash()) {
typeRet = TX_SCRIPTHASH;
std::vector<uint8_t> hashBytes(scriptPubKey.begin() + 2, std::vector<uint8_t> hashBytes(scriptPubKey.begin() + 2,
scriptPubKey.begin() + 22); scriptPubKey.begin() + 22);
vSolutionsRet.push_back(hashBytes); vSolutionsRet.push_back(hashBytes);
return true; return TX_SCRIPTHASH;
} }
// Provably prunable, data-carrying output // Provably prunable, data-carrying output
// //
// So long as script passes the IsUnspendable() test and all but the first // 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 // byte passes the IsPushOnly() test we don't care what exactly is in the
// script. // script.
if (scriptPubKey.size() >= 1 && scriptPubKey[0] == OP_RETURN && if (scriptPubKey.size() >= 1 && scriptPubKey[0] == OP_RETURN &&
scriptPubKey.IsPushOnly(scriptPubKey.begin() + 1)) { scriptPubKey.IsPushOnly(scriptPubKey.begin() + 1)) {
typeRet = TX_NULL_DATA; return TX_NULL_DATA;
return true;
} }
std::vector<uint8_t> data; std::vector<uint8_t> data;
if (MatchPayToPubkey(scriptPubKey, data)) { if (MatchPayToPubkey(scriptPubKey, data)) {
typeRet = TX_PUBKEY;
vSolutionsRet.push_back(std::move(data)); vSolutionsRet.push_back(std::move(data));
return true; return TX_PUBKEY;
} }
if (MatchPayToPubkeyHash(scriptPubKey, data)) { if (MatchPayToPubkeyHash(scriptPubKey, data)) {
typeRet = TX_PUBKEYHASH;
vSolutionsRet.push_back(std::move(data)); vSolutionsRet.push_back(std::move(data));
return true; return TX_PUBKEYHASH;
} }
unsigned int required; unsigned int required;
std::vector<std::vector<uint8_t>> keys; std::vector<std::vector<uint8_t>> keys;
if (MatchMultisig(scriptPubKey, required, keys)) { if (MatchMultisig(scriptPubKey, required, keys)) {
typeRet = TX_MULTISIG;
// safe as required is in range 1..16 // safe as required is in range 1..16
vSolutionsRet.push_back({static_cast<uint8_t>(required)}); vSolutionsRet.push_back({static_cast<uint8_t>(required)});
vSolutionsRet.insert(vSolutionsRet.end(), keys.begin(), keys.end()); vSolutionsRet.insert(vSolutionsRet.end(), keys.begin(), keys.end());
// safe as size is in range 1..16 // safe as size is in range 1..16
vSolutionsRet.push_back({static_cast<uint8_t>(keys.size())}); vSolutionsRet.push_back({static_cast<uint8_t>(keys.size())});
return true; return TX_MULTISIG;
} }
vSolutionsRet.clear(); vSolutionsRet.clear();
typeRet = TX_NONSTANDARD; return TX_NONSTANDARD;
return false;
} }
bool ExtractDestination(const CScript &scriptPubKey, bool ExtractDestination(const CScript &scriptPubKey,
CTxDestination &addressRet) { CTxDestination &addressRet) {
std::vector<valtype> vSolutions; std::vector<valtype> vSolutions;
txnouttype whichType; txnouttype whichType = Solver(scriptPubKey, vSolutions);
if (!Solver(scriptPubKey, whichType, vSolutions)) {
return false;
}
if (whichType == TX_PUBKEY) { if (whichType == TX_PUBKEY) {
CPubKey pubKey(vSolutions[0]); CPubKey pubKey(vSolutions[0]);
if (!pubKey.IsValid()) { if (!pubKey.IsValid()) {
return false; return false;
} }
addressRet = pubKey.GetID(); addressRet = pubKey.GetID();
Show All 10 Linesbool ExtractDestination(const CScript &scriptPubKey,
// Multisig txns have more than one address... // Multisig txns have more than one address...
return false; return false;
} }
bool ExtractDestinations(const CScript &scriptPubKey, txnouttype &typeRet, bool ExtractDestinations(const CScript &scriptPubKey, txnouttype &typeRet,
std::vector<CTxDestination> &addressRet, std::vector<CTxDestination> &addressRet,
int &nRequiredRet) { int &nRequiredRet) {
addressRet.clear(); addressRet.clear();
typeRet = TX_NONSTANDARD;
std::vector<valtype> vSolutions; std::vector<valtype> vSolutions;
if (!Solver(scriptPubKey, typeRet, vSolutions)) { typeRet = Solver(scriptPubKey, vSolutions);
if (typeRet == TX_NONSTANDARD) {
return false; return false;
} } else if (typeRet == TX_NULL_DATA) {
if (typeRet == TX_NULL_DATA) {
// This is data, not addresses // This is data, not addresses
return false; return false;
} }
if (typeRet == TX_MULTISIG) { if (typeRet == TX_MULTISIG) {
nRequiredRet = vSolutions.front()[0]; nRequiredRet = vSolutions.front()[0];
for (size_t i = 1; i < vSolutions.size() - 1; i++) { for (size_t i = 1; i < vSolutions.size() - 1; i++) {
CPubKey pubKey(vSolutions[i]); CPubKey pubKey(vSolutions[i]);
▲ Show 20 Lines • Show All 77 Lines • Show Last 20 Lines