make rbf selection allowed configurable

electrum/gui/qml/components/ConfirmTxDialog.qml

@@ -179,6 +179,7 @@ Dialog {
             text: qsTr('Replace-by-Fee')
             Layout.columnSpan: 2
             checked: finalizer.rbf
+            visible: finalizer.canRbf
         }
 
         Rectangle {

electrum/gui/qml/components/Send.qml

@@ -245,6 +245,7 @@ Pane {
             title: qsTr('Confirm Payment')
             finalizer: TxFinalizer {
                 wallet: Daemon.currentWallet
+                canRbf: True
             }
         }
     }

electrum/gui/qml/qechannelopener.py

@@ -140,11 +140,13 @@ class QEChannelOpener(QObject):
         acpt = lambda tx: self.do_open_channel(tx, str(self._peer), None)
 
         self._finalizer = QETxFinalizer(self, make_tx=mktx, accept=acpt)
+        self._finalizer.canRbf = False
         self._finalizer.amount = self._amount
         self._finalizer.wallet = self._wallet
         self.finalizerChanged.emit()
 
     def do_open_channel(self, funding_tx, conn_str, password):
+        self._logger.debug('opening channel')
         # read funding_sat from tx; converts '!' to int value
         funding_sat = funding_tx.output_value_for_address(ln_dummy_address())
         lnworker = self._wallet.wallet.lnworker
@@ -160,6 +162,7 @@ class QEChannelOpener(QObject):
             self.channelOpenError.emit(_('Problem opening channel: ') + '\n' + repr(e))
             return
 
+        self._logger.debug('opening channel succeeded')
         self.channelOpenSuccess.emit(chan.channel_id.hex(), chan.has_onchain_backup())
 
         # TODO: it would be nice to show this before broadcasting

electrum/gui/qml/qetxfinalizer.py

@@ -32,6 +32,7 @@ class QETxFinalizer(QObject):
     _warning = ''
     _target = ''
     _rbf = False
+    _canRbf = False
     _outputs = []
     config = None
 
@@ -126,6 +127,19 @@ class QETxFinalizer(QObject):
             self.update()
             self.rbfChanged.emit()
 
+    canRbfChanged = pyqtSignal()
+    @pyqtProperty(bool, notify=canRbfChanged)
+    def canRbf(self):
+        return self._canRbf
+
+    @canRbf.setter
+    def canRbf(self, canRbf):
+        if self._canRbf != canRbf:
+            self._canRbf = canRbf
+            self.canRbfChanged.emit()
+            if not canRbf and self.rbf:
+                self.rbf = False
+
     outputsChanged = pyqtSignal()
     @pyqtProperty('QVariantList', notify=outputsChanged)
     def outputs(self):