diff options
| -rw-r--r-- | src/init.cpp | 17 | ||||
| -rw-r--r-- | src/policy/policy.cpp | 1 | ||||
| -rw-r--r-- | src/policy/policy.h | 3 | ||||
| -rw-r--r-- | src/txmempool.cpp | 7 | ||||
| -rw-r--r-- | src/txmempool.h | 7 |
5 files changed, 24 insertions, 11 deletions
diff --git a/src/init.cpp b/src/init.cpp index b0c045da15..f3a3a1d276 100644 --- a/src/init.cpp +++ b/src/init.cpp @@ -465,8 +465,10 @@ std::string HelpMessage(HelpMessageMode mode) AppendParamsHelpMessages(strUsage, showDebug); strUsage += HelpMessageGroup(_("Node relay options:")); - if (showDebug) + if (showDebug) { strUsage += HelpMessageOpt("-acceptnonstdtxn", strprintf("Relay and mine \"non-standard\" transactions (%sdefault: %u)", "testnet/regtest only; ", !Params(CBaseChainParams::TESTNET).RequireStandard())); + strUsage += HelpMessageOpt("-incrementalrelayfee=<amt>", strprintf("Fee rate (in %s/kB) used to define cost of relay, used for mempool limiting and BIP 125 replacement. (default: %s)", CURRENCY_UNIT, FormatMoney(DEFAULT_INCREMENTAL_RELAY_FEE))); + } 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)); @@ -923,6 +925,15 @@ bool AppInitParameterInteraction() int64_t nMempoolSizeMin = GetArg("-limitdescendantsize", DEFAULT_DESCENDANT_SIZE_LIMIT) * 1000 * 40; if (nMempoolSizeMax < 0 || nMempoolSizeMax < nMempoolSizeMin) return InitError(strprintf(_("-maxmempool must be at least %d MB"), std::ceil(nMempoolSizeMin / 1000000.0))); + // incremental relay fee sets the minimimum feerate increase necessary for BIP 125 replacement in the mempool + // and the amount the mempool min fee increases above the feerate of txs evicted due to mempool limiting. + if (IsArgSet("-incrementalrelayfee")) + { + CAmount n = 0; + if (!ParseMoney(GetArg("-incrementalrelayfee", ""), n)) + return InitError(AmountErrMsg("incrementalrelayfee", GetArg("-incrementalrelayfee", ""))); + incrementalRelayFee = CFeeRate(n); + } // -par=0 means autodetect, but nScriptCheckThreads==0 means no concurrency nScriptCheckThreads = GetArg("-par", DEFAULT_SCRIPTCHECK_THREADS); @@ -969,6 +980,10 @@ bool AppInitParameterInteraction() return InitError(AmountErrMsg("minrelaytxfee", GetArg("-minrelaytxfee", ""))); // High fee check is done afterward in CWallet::ParameterInteraction() ::minRelayTxFee = CFeeRate(n); + } else if (incrementalRelayFee > ::minRelayTxFee) { + // Allow only setting incrementalRelayFee to control both + ::minRelayTxFee = incrementalRelayFee; + LogPrintf("Increasing minrelaytxfee to %s to match incrementalrelayfee\n",::minRelayTxFee.ToString()); } // Sanity check argument for min fee for including tx in block diff --git a/src/policy/policy.cpp b/src/policy/policy.cpp index d318a0997c..4dacd6b545 100644 --- a/src/policy/policy.cpp +++ b/src/policy/policy.cpp @@ -206,6 +206,7 @@ bool IsWitnessStandard(const CTransaction& tx, const CCoinsViewCache& mapInputs) return true; } +CFeeRate incrementalRelayFee = CFeeRate(DEFAULT_INCREMENTAL_RELAY_FEE); unsigned int nBytesPerSigOp = DEFAULT_BYTES_PER_SIGOP; int64_t GetVirtualTransactionSize(int64_t nWeight, int64_t nSigOpCost) diff --git a/src/policy/policy.h b/src/policy/policy.h index 5c6a7b1865..039122a59e 100644 --- a/src/policy/policy.h +++ b/src/policy/policy.h @@ -30,6 +30,8 @@ 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 -incrementalrelayfee, which sets the minimum feerate increase for mempool limiting or BIP 125 replacement **/ +static const unsigned int DEFAULT_INCREMENTAL_RELAY_FEE = 1000; /** Default for -bytespersigop */ static const unsigned int DEFAULT_BYTES_PER_SIGOP = 20; /** The maximum number of witness stack items in a standard P2WSH script */ @@ -85,6 +87,7 @@ bool AreInputsStandard(const CTransaction& tx, const CCoinsViewCache& mapInputs) */ bool IsWitnessStandard(const CTransaction& tx, const CCoinsViewCache& mapInputs); +extern CFeeRate incrementalRelayFee; extern unsigned int nBytesPerSigOp; /** Compute the virtual transaction size (weight reinterpreted as bytes). */ diff --git a/src/txmempool.cpp b/src/txmempool.cpp index 4ccbcadefc..c6eaf661da 100644 --- a/src/txmempool.cpp +++ b/src/txmempool.cpp @@ -359,7 +359,6 @@ CTxMemPool::CTxMemPool(const CFeeRate& _minReasonableRelayFee) : nCheckFrequency = 0; minerPolicyEstimator = new CBlockPolicyEstimator(_minReasonableRelayFee); - minReasonableRelayFee = _minReasonableRelayFee; } CTxMemPool::~CTxMemPool() @@ -1077,12 +1076,12 @@ CFeeRate CTxMemPool::GetMinFee(size_t sizelimit) const { rollingMinimumFeeRate = rollingMinimumFeeRate / pow(2.0, (time - lastRollingFeeUpdate) / halflife); lastRollingFeeUpdate = time; - if (rollingMinimumFeeRate < (double)minReasonableRelayFee.GetFeePerK() / 2) { + if (rollingMinimumFeeRate < (double)incrementalRelayFee.GetFeePerK() / 2) { rollingMinimumFeeRate = 0; return CFeeRate(0); } } - return std::max(CFeeRate(rollingMinimumFeeRate), minReasonableRelayFee); + return std::max(CFeeRate(rollingMinimumFeeRate), incrementalRelayFee); } void CTxMemPool::trackPackageRemoved(const CFeeRate& rate) { @@ -1106,7 +1105,7 @@ void CTxMemPool::TrimToSize(size_t sizelimit, std::vector<uint256>* pvNoSpendsRe // to have 0 fee). This way, we don't allow txn to enter mempool with feerate // equal to txn which were removed with no block in between. CFeeRate removed(it->GetModFeesWithDescendants(), it->GetSizeWithDescendants()); - removed += minReasonableRelayFee; + removed += incrementalRelayFee; trackPackageRemoved(removed); maxFeeRateRemoved = std::max(maxFeeRateRemoved, removed); diff --git a/src/txmempool.h b/src/txmempool.h index 7c68053f26..359babee55 100644 --- a/src/txmempool.h +++ b/src/txmempool.h @@ -425,8 +425,6 @@ private: uint64_t totalTxSize; //!< sum of all mempool tx' byte sizes uint64_t cachedInnerUsage; //!< sum of dynamic memory usage of all the map elements (NOT the maps themselves) - CFeeRate minReasonableRelayFee; - mutable int64_t lastRollingFeeUpdate; mutable bool blockSinceLastRollingFeeBump; mutable double rollingMinimumFeeRate; //!< minimum fee to get into the pool, decreases exponentially @@ -505,9 +503,6 @@ public: std::map<uint256, std::pair<double, CAmount> > mapDeltas; /** Create a new CTxMemPool. - * minReasonableRelayFee should be a feerate which is, roughly, somewhere - * around what it "costs" to relay a transaction around the network and - * below which we would reasonably say a transaction has 0-effective-fee. */ CTxMemPool(const CFeeRate& _minReasonableRelayFee); ~CTxMemPool(); @@ -591,7 +586,7 @@ public: /** The minimum fee to get into the mempool, which may itself not be enough * for larger-sized transactions. - * The minReasonableRelayFee constructor arg is used to bound the time it + * The incrementalRelayFee policy variable is used to bound the time it * takes the fee rate to go back down all the way to 0. When the feerate * would otherwise be half of this, it is set to 0 instead. */ |