qml: first part of partially signing tx while not having txid yet

electrum/gui/qml/qetxdetails.py

@@ -310,7 +310,7 @@ class QETxDetails(QObject, QtEventListener):
         self._short_id = tx_mined_info.short_id() or ""
 
     @pyqtSlot()
-    def sign_and_broadcast(self):
+    def signAndBroadcast(self):
         self._sign(broadcast=True)
 
     @pyqtSlot()
@@ -320,20 +320,24 @@ class QETxDetails(QObject, QtEventListener):
     def _sign(self, broadcast):
         # TODO: connecting/disconnecting signal handlers here is hmm
         try:
-            self._wallet.transactionSigned.disconnect(self.onSigned)
-            self._wallet.broadcastSucceeded.disconnect(self.onBroadcastSucceeded)
             if broadcast:
+                self._wallet.broadcastSucceeded.disconnect(self.onBroadcastSucceeded)
                 self._wallet.broadcastfailed.disconnect(self.onBroadcastFailed)
         except:
             pass
-        self._wallet.transactionSigned.connect(self.onSigned)
-        self._wallet.broadcastSucceeded.connect(self.onBroadcastSucceeded)
+
         if broadcast:
+            self._wallet.broadcastSucceeded.connect(self.onBroadcastSucceeded)
             self._wallet.broadcastFailed.connect(self.onBroadcastFailed)
-        self._wallet.sign(self._tx, broadcast=broadcast)
+
+        self._wallet.sign(self._tx, broadcast=broadcast, on_success=self.on_signed_tx)
         # side-effect: signing updates self._tx
         # we rely on this for broadcast
 
+    def on_signed_tx(self, tx: Transaction):
+        self._logger.debug('on_signed_tx')
+        self.update()
+
     @pyqtSlot()
     def broadcast(self):
         assert self._tx.is_complete()
@@ -349,15 +353,6 @@ class QETxDetails(QObject, QtEventListener):
 
         self._wallet.broadcast(self._tx)
 
-    @pyqtSlot(str)
-    def onSigned(self, txid):
-        if txid != self._txid:
-            return
-
-        self._logger.debug('onSigned')
-        self._wallet.transactionSigned.disconnect(self.onSigned)
-        self.update()
-
     @pyqtSlot(str)
     def onBroadcastSucceeded(self, txid):
         if txid != self._txid: