Type-safe CFeeRate class

Use CFeeRate instead of an int64_t for quantities that are
fee-per-size.

Helps prevent unit-conversion mismatches between the wallet,
relaying, and mining code.

1 files changed, 7 insertions, 22 deletions

diff --git a/src/qt/coincontroldialog.cpp b/src/qt/coincontroldialog.cpp
index dc9d2afe27..e27f1bff97 100644
--- a/src/qt/coincontroldialog.cpp
+++ b/src/qt/coincontroldialog.cpp
@@ -453,7 +453,7 @@ void CoinControlDialog::updateLabels(WalletModel *model, QDialog* dialog)
 
             CTxOut txout(amount, (CScript)vector<unsigned char>(24, 0));
             txDummy.vout.push_back(txout);
-            if (txout.IsDust(CTransaction::nMinRelayTxFee))
+            if (txout.IsDust(CTransaction::minRelayTxFee))
                fDust = true;
         }
     }
@@ -525,7 +525,7 @@ void CoinControlDialog::updateLabels(WalletModel *model, QDialog* dialog)
         sPriorityLabel = CoinControlDialog::getPriorityLabel(dPriority);
 
         // Fee
-        int64_t nFee = nTransactionFee * (1 + (int64_t)nBytes / 1000);
+        int64_t nFee = payTxFee.GetFee(nBytes);
 
         // Min Fee
         int64_t nMinFee = GetMinFee(txDummy, nBytes, AllowFree(dPriority), GMF_SEND);
@@ -536,26 +536,11 @@ void CoinControlDialog::updateLabels(WalletModel *model, QDialog* dialog)
         {
             nChange = nAmount - nPayFee - nPayAmount;
 
-            // if sub-cent change is required, the fee must be raised to at least CTransaction::nMinTxFee
-            if (nPayFee < CTransaction::nMinTxFee && nChange > 0 && nChange < CENT)
-            {
-                if (nChange < CTransaction::nMinTxFee) // change < 0.0001 => simply move all change to fees
-                {
-                    nPayFee += nChange;
-                    nChange = 0;
-                }
-                else
-                {
-                    nChange = nChange + nPayFee - CTransaction::nMinTxFee;
-                    nPayFee = CTransaction::nMinTxFee;
-                }
-            }
-
             // Never create dust outputs; if we would, just add the dust to the fee.
             if (nChange > 0 && nChange < CENT)
             {
                 CTxOut txout(nChange, (CScript)vector<unsigned char>(24, 0));
-                if (txout.IsDust(CTransaction::nMinRelayTxFee))
+                if (txout.IsDust(CTransaction::minRelayTxFee))
                 {
                     nPayFee += nChange;
                     nChange = 0;
@@ -610,19 +595,19 @@ void CoinControlDialog::updateLabels(WalletModel *model, QDialog* dialog)
 
     // tool tips
     QString toolTip1 = tr("This label turns red, if the transaction size is greater than 1000 bytes.") + "<br /><br />";
-    toolTip1 += tr("This means a fee of at least %1 per kB is required.").arg(BitcoinUnits::formatWithUnit(nDisplayUnit, CTransaction::nMinTxFee)) + "<br /><br />";
+    toolTip1 += tr("This means a fee of at least %1 per kB is required.").arg(BitcoinUnits::formatWithUnit(nDisplayUnit, CTransaction::minTxFee.GetFeePerK())) + "<br /><br />";
     toolTip1 += tr("Can vary +/- 1 byte per input.");
 
     QString toolTip2 = tr("Transactions with higher priority are more likely to get included into a block.") + "<br /><br />";
     toolTip2 += tr("This label turns red, if the priority is smaller than \"medium\".") + "<br /><br />";
-    toolTip2 += tr("This means a fee of at least %1 per kB is required.").arg(BitcoinUnits::formatWithUnit(nDisplayUnit, CTransaction::nMinTxFee));
+    toolTip2 += tr("This means a fee of at least %1 per kB is required.").arg(BitcoinUnits::formatWithUnit(nDisplayUnit, CTransaction::minTxFee.GetFeePerK()));
 
     QString toolTip3 = tr("This label turns red, if any recipient receives an amount smaller than %1.").arg(BitcoinUnits::formatWithUnit(nDisplayUnit, CENT)) + "<br /><br />";
-    toolTip3 += tr("This means a fee of at least %1 is required.").arg(BitcoinUnits::formatWithUnit(nDisplayUnit, CTransaction::nMinTxFee)) + "<br /><br />";
+    toolTip3 += tr("This means a fee of at least %1 is required.").arg(BitcoinUnits::formatWithUnit(nDisplayUnit, CTransaction::minTxFee.GetFeePerK())) + "<br /><br />";
     toolTip3 += tr("Amounts below 0.546 times the minimum relay fee are shown as dust.");
 
     QString toolTip4 = tr("This label turns red, if the change is smaller than %1.").arg(BitcoinUnits::formatWithUnit(nDisplayUnit, CENT)) + "<br /><br />";
-    toolTip4 += tr("This means a fee of at least %1 is required.").arg(BitcoinUnits::formatWithUnit(nDisplayUnit, CTransaction::nMinTxFee));
+    toolTip4 += tr("This means a fee of at least %1 is required.").arg(BitcoinUnits::formatWithUnit(nDisplayUnit, CTransaction::minTxFee.GetFeePerK()));
 
     l5->setToolTip(toolTip1);
     l6->setToolTip(toolTip2);