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Merge #9343: Don't create change at dust limit

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6171826 Don't create change at the dust limit, even if it means paying more than expected (Alex Morcos)

Tree-SHA512: d4cf939b97a92d63d4703ad152093c9dc60e74af590697bc21adbcdf17fc9e6ffb37d46d5eefafbd69327d1bcb79911f1b826ce1d960d895d464c4408c4995c3
This commit is contained in:
Wladimir J. van der Laan
2017-06-22 17:55:51 +02:00
parent 87e69c2549 61718268b5
commit 209eef60a9
2 changed files with 4 additions and 29 deletions
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22
src/wallet/wallet.cpp
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@@ -2633,28 +2633,6 @@ bool CWallet::CreateTransaction(const std::vector<CRecipient>& vecSend, CWalletT
CTxOut newTxOut(nChange, scriptChange);
// We do not move dust-change to fees, because the sender would end up paying more than requested.
// This would be against the purpose of the all-inclusive feature.
// So instead we raise the change and deduct from the recipient.
if (nSubtractFeeFromAmount > 0 && IsDust(newTxOut, ::dustRelayFee))
{
CAmount nDust = GetDustThreshold(newTxOut, ::dustRelayFee) - newTxOut.nValue;
newTxOut.nValue += nDust; // raise change until no more dust
for (unsigned int i = 0; i < vecSend.size(); i++) // subtract from first recipient
{
if (vecSend[i].fSubtractFeeFromAmount)
{
txNew.vout[i].nValue -= nDust;
if (IsDust(txNew.vout[i], ::dustRelayFee))
{
strFailReason = _("The transaction amount is too small to send after the fee has been deducted");
return false;
}
break;
}
}
}
// Never create dust outputs; if we would, just
// add the dust to the fee.
if (IsDust(newTxOut, ::dustRelayFee))