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Make witness v0 outputs non-standard before segwit activation

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Johnson Lau 2016-07-20 18:31:45 +08:00 committed by Johnson Lau
parent 8e048f40cc
commit 1ffaff2f74
3 changed files with 11 additions and 7 deletions
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5
src/main.cpp
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@ -1144,13 +1144,14 @@ bool AcceptToMemoryPoolWorker(CTxMemPool& pool, CValidationState& state, const C
}
// Reject transactions with witness before segregated witness activates (override with -prematurewitness)
if (!GetBoolArg("-prematurewitness",false) && !tx.wit.IsNull() && !IsWitnessEnabled(chainActive.Tip(), Params().GetConsensus())) {
bool witnessEnabled = IsWitnessEnabled(chainActive.Tip(), Params().GetConsensus());
if (!GetBoolArg("-prematurewitness",false) && !tx.wit.IsNull() && !witnessEnabled) {
return state.DoS(0, false, REJECT_NONSTANDARD, "no-witness-yet", true);
}
// Rather not work on nonstandard transactions (unless -testnet/-regtest)
string reason;
if (fRequireStandard && !IsStandardTx(tx, reason))
if (fRequireStandard && !IsStandardTx(tx, reason, witnessEnabled))
return state.DoS(0, false, REJECT_NONSTANDARD, reason);
// Only accept nLockTime-using transactions that can be mined in the next

9
src/policy/policy.cpp
View file

@ -31,7 +31,7 @@
* DUP CHECKSIG DROP ... repeated 100 times... OP_1
*/
bool IsStandard(const CScript& scriptPubKey, txnouttype& whichType)
bool IsStandard(const CScript& scriptPubKey, txnouttype& whichType, const bool witnessEnabled)
{
std::vector<std::vector<unsigned char> > vSolutions;
if (!Solver(scriptPubKey, whichType, vSolutions))
@ -50,10 +50,13 @@ bool IsStandard(const CScript& scriptPubKey, txnouttype& whichType)
(!fAcceptDatacarrier || scriptPubKey.size() > nMaxDatacarrierBytes))
return false;
else if (!witnessEnabled && (whichType == TX_WITNESS_V0_KEYHASH || whichType == TX_WITNESS_V0_SCRIPTHASH))
return false;
return whichType != TX_NONSTANDARD;
}
bool IsStandardTx(const CTransaction& tx, std::string& reason)
bool IsStandardTx(const CTransaction& tx, std::string& reason, const bool witnessEnabled)
{
if (tx.nVersion > CTransaction::MAX_STANDARD_VERSION || tx.nVersion < 1) {
reason = "version";
@ -92,7 +95,7 @@ bool IsStandardTx(const CTransaction& tx, std::string& reason)
unsigned int nDataOut = 0;
txnouttype whichType;
BOOST_FOREACH(const CTxOut& txout, tx.vout) {
if (!::IsStandard(txout.scriptPubKey, whichType)) {
if (!::IsStandard(txout.scriptPubKey, whichType, witnessEnabled)) {
reason = "scriptpubkey";
return false;
}

4
src/policy/policy.h
View file

@ -53,12 +53,12 @@ static const unsigned int STANDARD_NOT_MANDATORY_VERIFY_FLAGS = STANDARD_SCRIPT_
static const unsigned int STANDARD_LOCKTIME_VERIFY_FLAGS = LOCKTIME_VERIFY_SEQUENCE |
LOCKTIME_MEDIAN_TIME_PAST;
bool IsStandard(const CScript& scriptPubKey, txnouttype& whichType);
bool IsStandard(const CScript& scriptPubKey, txnouttype& whichType, const bool witnessEnabled = false);
/**
* Check for standard transaction types
* @return True if all outputs (scriptPubKeys) use only standard transaction forms
*/
bool IsStandardTx(const CTransaction& tx, std::string& reason);
bool IsStandardTx(const CTransaction& tx, std::string& reason, const bool witnessEnabled = false);
/**
* Check for standard transaction types
* @param[in] mapInputs Map of previous transactions that have outputs we're spending