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Remove CENT-output free transaction rule when relaying

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Remove the (relay/mempool) rule that all outputs of free transactions
must be greater than 0.01 XBT. Dust spam is now taken care of by making
dusty outputs non-standard.
This commit is contained in:
Gavin Andresen 2013-09-18 11:48:41 +10:00
parent b16e9f02c8
commit ea1cd5b47f
2 changed files with 8 additions and 5 deletions
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6
src/main.cpp
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@ -760,8 +760,10 @@ int64 GetMinFee(const CTransaction& tx, bool fAllowFree, enum GetMinFee_mode mod
nMinFee = 0; nMinFee = 0;
} }
// To limit dust spam, require base fee if any output is less than 0.01 // This code can be removed after enough miners have upgraded to version 0.9.
if (nMinFee < nBaseFee) // Until then, be safe when sending and require a fee if any output
// is less than CENT:
if (nMinFee < nBaseFee && mode == GMF_SEND)
{ {
BOOST_FOREACH(const CTxOut& txout, tx.vout) BOOST_FOREACH(const CTxOut& txout, tx.vout)
if (txout.nValue < CENT) if (txout.nValue < CENT)

7
src/wallet.cpp
View file

@ -1232,9 +1232,10 @@ bool CWallet::CreateTransaction(const vector<pair<CScript, int64> >& vecSend,
} }
int64 nChange = nValueIn - nValue - nFeeRet; int64 nChange = nValueIn - nValue - nFeeRet;
// if sub-cent change is required, the fee must be raised to at least nMinTxFee // The following if statement should be removed once enough miners
// or until nChange becomes zero // have upgraded to the 0.9 GetMinFee() rules. Until then, this avoids
// NOTE: this depends on the exact behaviour of GetMinFee // creating free transactions that have change outputs less than
// CENT bitcoins.
if (nFeeRet < CTransaction::nMinTxFee && nChange > 0 && nChange < CENT) if (nFeeRet < CTransaction::nMinTxFee && nChange > 0 && nChange < CENT)
{ {
int64 nMoveToFee = min(nChange, CTransaction::nMinTxFee - nFeeRet); int64 nMoveToFee = min(nChange, CTransaction::nMinTxFee - nFeeRet);