qml: update swaphelper server fee

electrum/gui/qml/components/SwapDialog.qml

@@ -89,9 +89,6 @@ ElDialog {
             }
 
             RowLayout {
-                Label {
-                    text: swaphelper.serverfeeperc
-                }
                 Label {
                     text: Config.formatSats(swaphelper.serverfee)
                     font.family: FixedFont
@@ -100,6 +97,9 @@ ElDialog {
                     text: Config.baseUnit
                     color: Material.accentColor
                 }
+                Label {
+                    text: '(' + swaphelper.serverfeeperc + ')'
+                }
             }
 
             Label {

electrum/gui/qml/qeswaphelper.py

@@ -1,4 +1,5 @@
 import asyncio
+import math
 from typing import Union
 
 from PyQt5.QtCore import pyqtProperty, pyqtSignal, pyqtSlot, QObject
@@ -242,7 +243,8 @@ class QESwapHelper(AuthMixin, QObject):
 
             # fee breakdown
             self.serverfeeperc = f'{swap_manager.percentage:0.1f}%'
-            self.serverfee = QEAmount(amount_sat=swap_manager.lockup_fee)
+            serverfee = math.ceil(swap_manager.percentage * pay_amount / 100) + swap_manager.lockup_fee
+            self.serverfee = QEAmount(amount_sat=serverfee)
             self.miningfee = QEAmount(amount_sat=swap_manager.get_claim_fee())
 
         else:  # forward (normal) swap
@@ -261,7 +263,8 @@ class QESwapHelper(AuthMixin, QObject):
 
             # fee breakdown
             self.serverfeeperc = f'{swap_manager.percentage:0.1f}%'
-            self.serverfee = QEAmount(amount_sat=swap_manager.normal_fee)
+            serverfee = math.ceil(swap_manager.percentage * pay_amount / 100) + swap_manager.normal_fee
+            self.serverfee = QEAmount(amount_sat=serverfee)
             self.miningfee = QEAmount(amount_sat=self._tx.get_fee()) if self._tx else QEAmount()
 
         if pay_amount and receive_amount: