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Merge pull request #5535

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1c52aad Require sufficent priority for relay of free transactions (Pieter Wuille)
This commit is contained in:
Wladimir J. van der Laan
2015-01-07 13:01:30 +01:00
parent 729ba31749 1c52aad540
commit d79adc1ab1
3 changed files with 8 additions and 2 deletions
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7
src/main.cpp
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@@ -1030,6 +1030,11 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa
hash.ToString(), nFees, txMinFee),
REJECT_INSUFFICIENTFEE, "insufficient fee");
// 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.
@@ -1049,7 +1054,7 @@ 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;
}