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Merge pull request #7323

45b8e27 -bytespersigop option to additionally limit sigops in transactions we relay and mine (Luke Dashjr)
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laanwj committed Jan 9, 2016
2 parents d513405 + 5b144b7 commit a344880e6ae35f3cc9a3a77b2633b3e2a62da510
Showing with 14 additions and 8 deletions.
  1. +2 −0 src/init.cpp
  2. +10 −8 src/main.cpp
  3. +2 −0 src/main.h
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@@ -474,6 +474,7 @@ 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("-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));
@@ -937,6 +938,7 @@ bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler)
fRequireStandard = !GetBoolArg("-acceptnonstdtxn", !Params().RequireStandard());
if (Params().RequireStandard() && !fRequireStandard)
return InitError(strprintf("acceptnonstdtxn is not currently supported for %s chain", chainparams.NetworkIDString()));
+ nBytesPerSigOp = GetArg("-bytespersigop", nBytesPerSigOp);
#ifdef ENABLE_WALLET
if (mapArgs.count("-mintxfee"))
View
@@ -69,6 +69,7 @@ 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;
@@ -929,16 +930,8 @@ bool AcceptToMemoryPoolWorker(CTxMemPool& pool, CValidationState &state, const C
if (fRequireStandard && !AreInputsStandard(tx, view))
return state.Invalid(false, REJECT_NONSTANDARD, "bad-txns-nonstandard-inputs");
- // Check that the transaction doesn't have an excessive number of
- // sigops, making it impossible to mine. Since the coinbase transaction
- // 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.
unsigned int nSigOps = GetLegacySigOpCount(tx);
nSigOps += GetP2SHSigOpCount(tx, view);
- if (nSigOps > MAX_STANDARD_TX_SIGOPS)
- return state.DoS(0, false, REJECT_NONSTANDARD, "bad-txns-too-many-sigops", false,
- strprintf("%d > %d", nSigOps, MAX_STANDARD_TX_SIGOPS));
CAmount nValueOut = tx.GetValueOut();
CAmount nFees = nValueIn-nValueOut;
@@ -964,6 +957,15 @@ bool AcceptToMemoryPoolWorker(CTxMemPool& pool, CValidationState &state, const C
CTxMemPoolEntry entry(tx, nFees, GetTime(), dPriority, chainActive.Height(), pool.HasNoInputsOf(tx), inChainInputValue, fSpendsCoinbase, nSigOps);
unsigned int nSize = entry.GetTxSize();
+ // Check that the transaction doesn't have an excessive number of
+ // sigops, making it impossible to mine. Since the coinbase transaction
+ // 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 ((nSigOps > MAX_STANDARD_TX_SIGOPS) || (nBytesPerSigOp && nSigOps > nSize / nBytesPerSigOp))
+ return state.DoS(0, false, REJECT_NONSTANDARD, "bad-txns-too-many-sigops", false,
+ strprintf("%d", nSigOps));
+
CAmount mempoolRejectFee = pool.GetMinFee(GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000).GetFee(nSize);
if (mempoolRejectFee > 0 && nModifiedFees < mempoolRejectFee) {
return state.DoS(0, false, REJECT_INSUFFICIENTFEE, "mempool min fee not met", false, strprintf("%d < %d", nFees, mempoolRejectFee));
View
@@ -100,6 +100,7 @@ static const bool DEFAULT_RELAYPRIORITY = true;
/** 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;
@@ -130,6 +131,7 @@ 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;

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