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Define dust transaction outputs, and make them non-standard

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This commit is contained in:
Gavin Andresen
2013-04-24 18:27:00 -04:00
parent b8e1dc2e53
commit 8de9bb53af
6 changed files with 74 additions and 27 deletions
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25
src/wallet.cpp
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@@ -1162,7 +1162,12 @@ bool CWallet::CreateTransaction(const vector<pair<CScript, int64> >& vecSend, CW
double dPriority = 0;
// vouts to the payees
BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
wtxNew.vout.push_back(CTxOut(s.second, s.first));
{
CTxOut txout(s.second, s.first);
if (txout.IsDust())
return false;
wtxNew.vout.push_back(txout);
}
// Choose coins to use
set<pair<const CWalletTx*,unsigned int> > setCoins;
@@ -1208,9 +1213,21 @@ bool CWallet::CreateTransaction(const vector<pair<CScript, int64> >& vecSend, CW
CScript scriptChange;
scriptChange.SetDestination(vchPubKey.GetID());
// Insert change txn at random position:
vector<CTxOut>::iterator position = wtxNew.vout.begin()+GetRandInt(wtxNew.vout.size()+1);
wtxNew.vout.insert(position, CTxOut(nChange, scriptChange));
CTxOut newTxOut(nChange, scriptChange);
// Never create dust outputs; if we would, just
// add the dust to the fee.
if (newTxOut.IsDust())
{
nFeeRet += nChange;
reservekey.ReturnKey();
}
else
{
// Insert change txn at random position:
vector<CTxOut>::iterator position = wtxNew.vout.begin()+GetRandInt(wtxNew.vout.size()+1);
wtxNew.vout.insert(position, newTxOut);
}
}
else
reservekey.ReturnKey();