qml: add initial sign and broadcast feature to TxDetails/qetxdetails

electrum/gui/qml/components/TxDetails.qml

@@ -277,6 +277,7 @@ Pane {
                     ToolButton {
                         icon.source: '../../icons/share.png'
                         icon.color: 'transparent'
+                        enabled: root.txid
                         onClicked: {
                             var dialog = app.genericShareDialog.createObject(root,
                                 { title: qsTr('Transaction ID'), text: root.txid }
@@ -324,6 +325,20 @@ Pane {
                 }
             }
 
+            RowLayout {
+                visible: !txdetails.isMined && !txdetails.isUnrelated
+                Layout.columnSpan: 2
+                Button {
+                    text: qsTr('Sign')
+                    enabled: !txdetails.isComplete
+                    onClicked: txdetails.sign()
+                }
+                Button {
+                    text: qsTr('Broadcast')
+                    enabled: txdetails.canBroadcast
+                    onClicked: txdetails.broadcast()
+                }
+            }
         }
     }
 

electrum/gui/qml/qetxdetails.py

@@ -35,6 +35,7 @@ class QETxDetails(QObject):
     _can_save_as_local = False
     _can_remove = False
     _is_unrelated = False
+    _is_complete = False
 
     _is_mined = False
 
@@ -184,6 +185,10 @@ class QETxDetails(QObject):
     def isUnrelated(self):
         return self._is_unrelated
 
+    @pyqtProperty(bool, notify=detailsChanged)
+    def isComplete(self):
+        return self._is_complete
+
     def update(self):
         if self._wallet is None:
             self._logger.error('wallet undefined')
@@ -230,6 +235,7 @@ class QETxDetails(QObject):
             else:
                 self._lnamount.satsInt = 0
 
+        self._is_complete = self._tx.is_complete()
         self._is_unrelated = txinfo.amount is None and self._lnamount.isEmpty
         self._is_lightning_funding_tx = txinfo.is_lightning_funding_tx
         self._can_bump = txinfo.can_bump
@@ -252,3 +258,28 @@ class QETxDetails(QObject):
         self._confirmations = tx_mined_info.conf
         self._txpos = tx_mined_info.txpos
         self._header_hash = tx_mined_info.header_hash
+
+    @pyqtSlot()
+    def sign(self):
+        try:
+            self._wallet.transactionSigned.disconnect(self.onSigned)
+        except:
+            pass
+        self._wallet.transactionSigned.connect(self.onSigned)
+        self._wallet.sign(self._tx)
+        # side-effect: signing updates self._tx
+        # we rely on this for broadcast
+
+    @pyqtSlot(str)
+    def onSigned(self, txid):
+        if txid != self._txid:
+            return
+
+        self._logger.debug('onSigned')
+        self._wallet.transactionSigned.disconnect(self.onSigned)
+        self.update()
+
+    @pyqtSlot()
+    def broadcast(self):
+        assert self._tx.is_complete()
+        self._wallet.broadcast(self._tx)

electrum/gui/qml/qewallet.py

@@ -59,6 +59,9 @@ class QEWallet(AuthMixin, QObject, QtEventListener):
     paymentSucceeded = pyqtSignal([str], arguments=['key'])
     paymentFailed = pyqtSignal([str,str], arguments=['key','reason'])
     requestNewPassword = pyqtSignal()
+    transactionSigned = pyqtSignal([str], arguments=['txid'])
+    #broadcastSucceeded = pyqtSignal([str], arguments=['txid'])
+    broadcastFailed = pyqtSignal([str,str,str], arguments=['txid','code','reason'])
 
     _network_signal = pyqtSignal(str, object)
 
@@ -399,17 +402,31 @@ class QEWallet(AuthMixin, QObject, QtEventListener):
 
         use_rbf = bool(self.wallet.config.get('use_rbf', True))
         tx.set_rbf(use_rbf)
-        self.sign_and_broadcast(tx)
+        self.sign(tx, broadcast=True)
 
     @auth_protect
-    def sign_and_broadcast(self, tx):
+    def sign(self, tx, *, broadcast: bool = False):
-        def cb(result):
-            self._logger.info('signing was succesful? %s' % str(result))
         tx = self.wallet.sign_transaction(tx, None)
+
+        if tx is None:
+            self._logger.info('did not sign')
+            return
+
+        txid = tx.txid()
+        self._logger.debug(f'txid={txid}')
+
+        self.transactionSigned.emit(txid)
+
         if not tx.is_complete():
             self._logger.info('tx not complete')
             return
 
+        if broadcast:
+            self.broadcast(tx)
+
+    def broadcast(self, tx):
+        assert tx.is_complete()
+
         self.network = self.wallet.network # TODO not always defined?
 
         try:
@@ -417,13 +434,14 @@ class QEWallet(AuthMixin, QObject, QtEventListener):
             self.network.run_from_another_thread(self.network.broadcast_transaction(tx))
             self._logger.info('broadcast submit done')
         except TxBroadcastError as e:
-            self._logger.info(e)
+            self.broadcastFailed.emit(tx.txid(),'',repr(e))
-            return
+            self._logger.error(e)
         except BestEffortRequestFailed as e:
-            self._logger.info(e)
+            self.broadcastFailed.emit(tx.txid(),'',repr(e))
-            return
+            self._logger.error(e)
 
-        return
+        #TODO: properly catch server side errors, e.g. bad-txns-inputs-missingorspent
+        #might need callback from network.py
 
     paymentAuthRejected = pyqtSignal()
     def ln_auth_rejected(self):