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Treat high-sigop transactions as larger rather than rejecting them

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This commit is contained in:
Pieter Wuille 2016-07-18 20:57:20 +02:00
parent 045106b4f1
commit ab942c15bd
6 changed files with 15 additions and 12 deletions
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2
src/init.cpp
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@ -446,7 +446,7 @@ std::string HelpMessage(HelpMessageMode mode)
strUsage += HelpMessageGroup(_("Node relay options:"));
if (showDebug)
strUsage += HelpMessageOpt("-acceptnonstdtxn", strprintf("Relay and mine \"non-standard\" transactions (%sdefault: %u)", "testnet/regtest only; ", !Params(CBaseChainParams::TESTNET).RequireStandard()));
strUsage += HelpMessageOpt("-bytespersigop", strprintf(_("Minimum bytes per sigop in transactions we relay and mine (default: %u)"), DEFAULT_BYTES_PER_SIGOP));
strUsage += HelpMessageOpt("-bytespersigop", strprintf(_("Equivalent bytes per sigop in transactions for relay and mining (default: %u)"), DEFAULT_BYTES_PER_SIGOP));
strUsage += HelpMessageOpt("-datacarrier", strprintf(_("Relay and mine data carrier transactions (default: %u)"), DEFAULT_ACCEPT_DATACARRIER));
strUsage += HelpMessageOpt("-datacarriersize", strprintf(_("Maximum size of data in data carrier transactions we relay and mine (default: %u)"), MAX_OP_RETURN_RELAY));
strUsage += HelpMessageOpt("-mempoolreplacement", strprintf(_("Enable transaction replacement in the memory pool (default: %u)"), DEFAULT_ENABLE_REPLACEMENT));

3
src/main.cpp
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@ -74,7 +74,6 @@ bool fHavePruned = false;
bool fPruneMode = false;
bool fIsBareMultisigStd = DEFAULT_PERMIT_BAREMULTISIG;
bool fRequireStandard = true;
unsigned int nBytesPerSigOp = DEFAULT_BYTES_PER_SIGOP;
bool fCheckBlockIndex = false;
bool fCheckpointsEnabled = DEFAULT_CHECKPOINTS_ENABLED;
size_t nCoinCacheUsage = 5000 * 300;
@ -1296,7 +1295,7 @@ bool AcceptToMemoryPoolWorker(CTxMemPool& pool, CValidationState& state, const C
// itself can contain sigops MAX_STANDARD_TX_SIGOPS is less than
// MAX_BLOCK_SIGOPS; we still consider this an invalid rather than
// merely non-standard transaction.
if ((nSigOpsCost > MAX_STANDARD_TX_SIGOPS_COST) || (nBytesPerSigOp && nSigOpsCost > nSize * WITNESS_SCALE_FACTOR / nBytesPerSigOp))
if (nSigOpsCost > MAX_STANDARD_TX_SIGOPS_COST)
return state.DoS(0, false, REJECT_NONSTANDARD, "bad-txns-too-many-sigops", false,
strprintf("%d", nSigOpsCost));

2
src/main.h
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@ -124,7 +124,6 @@ static const int64_t DEFAULT_MAX_TIP_AGE = 24 * 60 * 60;
/** Default for -permitbaremultisig */
static const bool DEFAULT_PERMIT_BAREMULTISIG = true;
static const unsigned int DEFAULT_BYTES_PER_SIGOP = 20;
static const bool DEFAULT_CHECKPOINTS_ENABLED = true;
static const bool DEFAULT_TXINDEX = false;
static const unsigned int DEFAULT_BANSCORE_THRESHOLD = 100;
@ -165,7 +164,6 @@ extern int nScriptCheckThreads;
extern bool fTxIndex;
extern bool fIsBareMultisigStd;
extern bool fRequireStandard;
extern unsigned int nBytesPerSigOp;
extern bool fCheckBlockIndex;
extern bool fCheckpointsEnabled;
extern size_t nCoinCacheUsage;

10
src/policy/policy.cpp
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@ -151,12 +151,14 @@ bool AreInputsStandard(const CTransaction& tx, const CCoinsViewCache& mapInputs)
return true;
}
int64_t GetVirtualTransactionSize(int64_t nWeight)
unsigned int nBytesPerSigOp = DEFAULT_BYTES_PER_SIGOP;
int64_t GetVirtualTransactionSize(int64_t nWeight, int64_t nSigOpCost)
{
return (nWeight + WITNESS_SCALE_FACTOR - 1) / WITNESS_SCALE_FACTOR;
return (std::max(nWeight, nSigOpCost * nBytesPerSigOp) + WITNESS_SCALE_FACTOR - 1) / WITNESS_SCALE_FACTOR;
}
int64_t GetVirtualTransactionSize(const CTransaction& tx)
int64_t GetVirtualTransactionSize(const CTransaction& tx, int64_t nSigOpCost)
{
return GetVirtualTransactionSize(GetTransactionWeight(tx));
return GetVirtualTransactionSize(GetTransactionWeight(tx), nSigOpCost);
}

8
src/policy/policy.h
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@ -28,6 +28,8 @@ static const unsigned int MAX_P2SH_SIGOPS = 15;
static const unsigned int MAX_STANDARD_TX_SIGOPS_COST = MAX_BLOCK_SIGOPS_COST/5;
/** Default for -maxmempool, maximum megabytes of mempool memory usage */
static const unsigned int DEFAULT_MAX_MEMPOOL_SIZE = 300;
/** Default for -bytespersigop */
static const unsigned int DEFAULT_BYTES_PER_SIGOP = 20;
/**
* Standard script verification flags that standard transactions will comply
* with. However scripts violating these flags may still be present in valid
@ -66,8 +68,10 @@ bool IsStandardTx(const CTransaction& tx, std::string& reason);
*/
bool AreInputsStandard(const CTransaction& tx, const CCoinsViewCache& mapInputs);
extern unsigned int nBytesPerSigOp;
/** Compute the virtual transaction size (weight reinterpreted as bytes). */
int64_t GetVirtualTransactionSize(int64_t nWeight);
int64_t GetVirtualTransactionSize(const CTransaction& tx);
int64_t GetVirtualTransactionSize(int64_t nWeight, int64_t nSigOpCost);
int64_t GetVirtualTransactionSize(const CTransaction& tx, int64_t nSigOpCost = 0);
#endif // BITCOIN_POLICY_POLICY_H

2
src/txmempool.cpp
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@ -75,7 +75,7 @@ void CTxMemPoolEntry::UpdateLockPoints(const LockPoints& lp)
size_t CTxMemPoolEntry::GetTxSize() const
{
return GetVirtualTransactionSize(nTxWeight);
return GetVirtualTransactionSize(nTxWeight, sigOpCost);
}
// Update the given tx for any in-mempool descendants.