void CoinControlDialog::updateLabels(WalletModel *model, QDialog* dialog)
{
if (!model) return;
// nPayAmount
qint64 nPayAmount = 0;
bool fLowOutput = false;
bool fDust = false;
CTransaction txDummy;
BOOST_FOREACH(const PAIRTYPE(QString, qint64) &payee, CoinControlDialog::payAddresses)
{
qint64 amount = payee.second;
nPayAmount += amount;
if (amount > 0)
{
if (amount < CENT)
fLowOutput = true;
}
}
QString sPriorityLabel = "";
int64 nAmount = 0;
int64 nPayFee = 0;
int64 nAfterFee = 0;
int64 nChange = 0;
unsigned int nBytes = 0;
unsigned int nBytesInputs = 0;
double dPriority = 0;
double dPriorityInputs = 0;
unsigned int nQuantity = 0;
vector<COutPoint> vCoinControl;
vector<COutput> vOutputs;
coinControl->ListSelected(vCoinControl);
model->getOutputs(vCoinControl, vOutputs);
nPayFee = nTransactionFee;
loop
{
txDummy.vin.clear();
txDummy.vout.clear();
nQuantity = 0;
nAmount = 0;
dPriorityInputs = 0;
nBytesInputs = 0;
// Inputs
BOOST_FOREACH(const COutput& out, vOutputs)
{
// Quantity
nQuantity++;
// Amount
nAmount += out.tx->vout[out.i].nValue;
// Priority
dPriorityInputs += (double)out.tx->vout[out.i].nValue * (out.nDepth+1);
// Bytes
txDummy.vin.push_back(CTxIn(out.tx->vout[out.i].GetHash(), out.tx->vout[out.i].nValue));
nBytesInputs += 73; // Future ECDSA signature in DER format
}
// Outputs
BOOST_FOREACH(const PAIRTYPE(QString, qint64) &payee, CoinControlDialog::payAddresses)
{
QString address = payee.first;
qint64 amount = payee.second;
CScript scriptPubKey;
scriptPubKey.SetDestination(CBitcoinAddress(address.toStdString()).Get());
CTxOut txout(amount, scriptPubKey);
txDummy.vout.push_back(txout);
}
// calculation
if (nQuantity > 0)
{
nChange = nAmount - nPayAmount - nPayFee;
// if sub-cent change is required, the fee must be raised to at least MIN_TX_FEE
// or until nChange becomes zero
// NOTE: this depends on the exact behaviour of GetMinFee
if (nPayFee < MIN_TX_FEE && nChange > 0 && nChange < CENT)
{
int64 nMoveToFee = min(nChange, MIN_TX_FEE - nPayFee);
nChange -= nMoveToFee;
nPayFee += nMoveToFee;
}
// Tamcoin: sub-cent change is moved to fee
if (nChange > 0 && nChange < MIN_TXOUT_AMOUNT)
{
nPayFee += nChange;
nChange = 0;
}
if (nChange > 0)
{
// Add a change address in the outputs
CTxOut txout(0, (CScript)vector<unsigned char>(24, 0));
txDummy.vout.push_back(txout);
}
// Bytes
nBytes = nBytesInputs + GetSerializeSize(*(CTransaction*)&txDummy, SER_NETWORK, PROTOCOL_VERSION);
// Priority
dPriority = dPriorityInputs / nBytes;
sPriorityLabel = CoinControlDialog::getPriorityLabel(dPriority);
// Fee
int64 nFee = nTransactionFee * (1 + (int64)nBytes / 1000);
// Min Fee
int64 nMinFee = txDummy.GetMinFee(1, false, GMF_SEND, nBytes);
if (nPayFee < max(nFee, nMinFee))
{
nPayFee = max(nFee, nMinFee);
continue;
}
// after fee
nAfterFee = nAmount - nPayFee;
if (nAfterFee < 0)
nAfterFee = 0;
}
break;
}
