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Require sufficent priority for relay of free transactions

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Rebased-From: 1c52aad540
Github-Pull: #5535
This commit is contained in:
Pieter Wuille
2014-12-23 23:50:21 +01:00
committed by Wladimir J. van der Laan
parent 06fdf326d3
commit 3022e7df2a
3 changed files with 9 additions and 3 deletions
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9
src/main.cpp
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@@ -1022,7 +1022,12 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa
hash.ToString(), nFees, txMinFee),
REJECT_INSUFFICIENTFEE, "insufficient fee");
// Continuously rate-limit free (really, very-low-fee)transactions
// Require that free transactions have sufficient priority to be mined in the next block.
if (GetBoolArg("-relaypriority", true) && nFees < ::minRelayTxFee.GetFee(nSize) && !AllowFree(view.GetPriority(tx, chainActive.Height() + 1))) {
return state.DoS(0, false, REJECT_INSUFFICIENTFEE, "insufficient priority");
}
// Continuously rate-limit free (really, very-low-fee) transactions
// This mitigates 'penny-flooding' -- sending thousands of free transactions just to
// be annoying or make others' transactions take longer to confirm.
if (fLimitFree && nFees < ::minRelayTxFee.GetFee(nSize))
@@ -1041,7 +1046,7 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa
// At default rate it would take over a month to fill 1GB
if (dFreeCount >= GetArg("-limitfreerelay", 15)*10*1000)
return state.DoS(0, error("AcceptToMemoryPool : free transaction rejected by rate limiter"),
REJECT_INSUFFICIENTFEE, "insufficient priority");
REJECT_INSUFFICIENTFEE, "rate limited free transaction");
LogPrint("mempool", "Rate limit dFreeCount: %g => %g\n", dFreeCount, dFreeCount+nSize);
dFreeCount += nSize;
}