expose more trampoline boilerplate

allow delegation of make_tx and accept/send

electrum/gui/qml/components/OpenChannel.qml

@@ -23,8 +23,10 @@ Pane {
             text: qsTr('Node')
         }
 
+        // gossip
         TextArea {
             id: node
+            visible: Config.useGossip
             Layout.columnSpan: 2
             Layout.fillWidth: true
             font.family: FixedFont
@@ -37,6 +39,7 @@ Pane {
         }
 
         RowLayout {
+            visible: Config.useGossip
             spacing: 0
             ToolButton {
                 icon.source: '../../icons/paste.png'
@@ -62,6 +65,18 @@ Pane {
             }
         }
 
+        // trampoline
+        ComboBox {
+            id: tnode
+            visible: !Config.useGossip
+            Layout.columnSpan: 3
+            Layout.fillWidth: true
+            model: channelopener.trampolineNodeNames
+            onCurrentValueChanged: {
+                channelopener.nodeid = tnode.currentValue
+            }
+        }
+
         Label {
             text: qsTr('Amount')
         }
@@ -85,9 +100,7 @@ Pane {
                 id: is_max
                 text: qsTr('Max')
                 onCheckedChanged: {
-                    if (checked) {
-                        channelopener.amount = MAX
-                    }
+                    channelopener.amount = checked ? MAX : Config.unitsToSats(amount.text)
                 }
             }
         }

electrum/gui/qml/components/Preferences.qml

@@ -105,6 +105,22 @@ Pane {
                             Daemon.fx.rateSource = currentValue
                     }
                 }
+
+                Label {
+                    text: qsTr('Lightning Routing')
+                    enabled: Daemon.currentWallet.isLightning
+                }
+
+                ComboBox {
+                    id: lnRoutingType
+                    valueRole: 'key'
+                    textRole: 'label'
+                    enabled: Daemon.currentWallet.isLightning && false
+                    model: ListModel {
+                        ListElement { key: 'gossip'; label: qsTr('Gossip') }
+                        ListElement { key: 'trampoline'; label: qsTr('Trampoline') }
+                    }
+                }
             }
 
         }
@@ -118,5 +134,6 @@ Pane {
         historicRates.checked = Daemon.fx.historicRates
         rateSources.currentIndex = rateSources.indexOfValue(Daemon.fx.rateSource)
         fiatEnable.checked = Daemon.fx.enabled
+        lnRoutingType.currentIndex = Config.useGossip ? 0 : 1
     }
 }

electrum/gui/qml/qechannelopener.py

@@ -2,7 +2,8 @@ from PyQt5.QtCore import pyqtProperty, pyqtSignal, pyqtSlot, QObject
 
 from electrum.logging import get_logger
 from electrum.util import format_time
-from electrum.lnutil import extract_nodeid, ConnStringFormatError
+from electrum.lnutil import extract_nodeid, ConnStringFormatError, LNPeerAddr
+from electrum.lnworker import hardcoded_trampoline_nodes
 from electrum.gui import messages
 
 from .qewallet import QEWallet
@@ -23,6 +24,8 @@ class QEChannelOpener(QObject):
     validationError = pyqtSignal([str,str], arguments=['code','message'])
     conflictingBackup = pyqtSignal([str], arguments=['message'])
 
+    dataChanged = pyqtSignal() # generic notify signal
+
     walletChanged = pyqtSignal()
     @pyqtProperty(QEWallet, notify=walletChanged)
     def wallet(self):
@@ -69,14 +72,28 @@ class QEChannelOpener(QObject):
     def openTx(self):
         return self._opentx
 
+    @pyqtProperty(list, notify=dataChanged)
+    def trampolineNodeNames(self):
+        return list(hardcoded_trampoline_nodes().keys())
+
+    # FIXME min channel funding amount
+    # FIXME have requested funding amount
     def validate(self):
         nodeid_valid = False
         if self._nodeid:
-            try:
-                self._node_pubkey, self._host_port = extract_nodeid(self._nodeid)
+            if not self._wallet.wallet.config.get('use_gossip', False):
+                self._peer = hardcoded_trampoline_nodes()[self._nodeid]
                 nodeid_valid = True
-            except ConnStringFormatError as e:
-                self.validationError.emit('invalid_nodeid', repr(e))
+            else:
+                try:
+                    node_pubkey, host_port = extract_nodeid(self._nodeid)
+                    host, port = host_port.split(':',1)
+                    self._peer = LNPeerAddr(host, int(port), node_pubkey)
+                    nodeid_valid = True
+                except ConnStringFormatError as e:
+                    self.validationError.emit('invalid_nodeid', repr(e))
+                except ValueError as e:
+                    self.validationError.emit('invalid_nodeid', repr(e))
 
         if not nodeid_valid:
             self._valid = False
@@ -99,16 +116,12 @@ class QEChannelOpener(QObject):
         if not self.valid:
             return
 
-        #if self.use_gossip:
-            #conn_str = self.pubkey
-            #if self.ipport:
-                #conn_str += '@' + self.ipport.strip()
-        #else:
-            #conn_str = str(self.trampolines[self.pubkey])
+        self._logger.debug('Connect String: %s' % str(self._peer))
+
         amount = '!' if self._amount.isMax else self._amount.satsInt
 
         lnworker = self._wallet.wallet.lnworker
-        if lnworker.has_conflicting_backup_with(node_pubkey) and not confirm_backup_conflict:
+        if lnworker.has_conflicting_backup_with(self._peer.pubkey) and not confirm_backup_conflict:
             self.conflictingBackup.emit(messages.MGS_CONFLICTING_BACKUP_INSTANCE)
             return
 
@@ -117,7 +130,7 @@ class QEChannelOpener(QObject):
         make_tx = lambda rbf: lnworker.mktx_for_open_channel(
             coins=coins,
             funding_sat=amount,
-            node_id=self._node_pubkey,
+            node_id=self._peer.pubkey,
             fee_est=None)
         #on_pay = lambda tx: self.app.protected('Create a new channel?', self.do_open_channel, (tx, conn_str))
         #d = ConfirmTxDialog(

electrum/gui/qml/qeconfig.py

@@ -70,6 +70,16 @@ class QEConfig(QObject):
         self.config.amt_add_thousands_sep = checked
         self.thousandsSeparatorChanged.emit()
 
+    useGossipChanged = pyqtSignal()
+    @pyqtProperty(bool, notify=useGossipChanged)
+    def useGossip(self):
+        return self.config.get('use_gossip', False)
+
+    @useGossip.setter
+    def useGossip(self, gossip):
+        self.config.set_key('use_gossip', gossip)
+        self.useGossipChanged.emit()
+
     @pyqtSlot('qint64', result=str)
     @pyqtSlot('qint64', bool, result=str)
     @pyqtSlot(QEAmount, result=str)

electrum/gui/qml/qetxfinalizer.py

@@ -11,8 +11,10 @@ from .qewallet import QEWallet
 from .qetypes import QEAmount
 
 class QETxFinalizer(QObject):
-    def __init__(self, parent=None):
+    def __init__(self, parent=None, *, make_tx=None, accept=None):
         super().__init__(parent)
+        self.f_make_tx = make_tx
+        self.f_accept = accept
         self._tx = None
 
     _logger = get_logger(__name__)
@@ -207,6 +209,11 @@ class QETxFinalizer(QObject):
 
     @profiler
     def make_tx(self):
+        if self.f_make_tx:
+            tx = self.f_make_tx()
+            return tx
+
+        # default impl
         coins = self._wallet.wallet.get_spendable_coins(None)
         outputs = [PartialTxOutput.from_address_and_value(self.address, self._amount.satsInt)]
         tx = self._wallet.wallet.make_unsigned_transaction(coins=coins,outputs=outputs, fee=None,rbf=self._rbf)
@@ -268,4 +275,8 @@ class QETxFinalizer(QObject):
             self._logger.debug('no valid tx')
             return
 
+        if self.f_accept:
+            self.f_accept(self._tx)
+            return
+
         self._wallet.sign_and_broadcast(self._tx)