qml: detect transaction removed (e.g. replace-by-fee) for qetxdetails and qetxfinalizer,

don't close active feebump/cancel dialogs, but invalidate them,
don't close TxDetails page, but show removed status,
show broadcast-failed status in TxDetails

electrum/gui/qml/qetxdetails.py

@@ -6,7 +6,7 @@ from electrum.i18n import _
 from electrum.logging import get_logger
 from electrum.bitcoin import DummyAddress
 from electrum.util import format_time, TxMinedInfo
-from electrum.transaction import tx_from_any, Transaction, PartialTxInput, Sighash, PartialTransaction, TxOutpoint
+from electrum.transaction import tx_from_any, Transaction, PartialTransaction
 from electrum.network import Network
 from electrum.address_synchronizer import TX_HEIGHT_UNCONF_PARENT, TX_HEIGHT_UNCONFIRMED, TX_HEIGHT_FUTURE
 from electrum.wallet import TxSighashDanger
@@ -22,7 +22,7 @@ class QETxDetails(QObject, QtEventListener):
 
     confirmRemoveLocalTx = pyqtSignal([str], arguments=['message'])
     txRemoved = pyqtSignal()
-    saveTxError = pyqtSignal([str,str], arguments=['code', 'message'])
+    saveTxError = pyqtSignal([str, str], arguments=['code', 'message'])
     saveTxSuccess = pyqtSignal()
 
     detailsChanged = pyqtSignal()
@@ -59,6 +59,7 @@ class QETxDetails(QObject, QtEventListener):
         self._is_complete = False
         self._is_mined = False
         self._is_rbf_enabled = False
+        self._is_removed = False
         self._lock_delay = 0
         self._sighash_danger = TxSighashDanger()
 
@@ -90,6 +91,8 @@ class QETxDetails(QObject, QtEventListener):
     def on_event_removed_transaction(self, wallet, tx):
         if wallet == self._wallet.wallet and tx.txid() == self._txid:
             self._logger.debug(f'removed my transaction {tx.txid()}')
+            self._is_removed = True
+            self.update()
             self.txRemoved.emit()
 
     walletChanged = pyqtSignal()
@@ -184,6 +187,10 @@ class QETxDetails(QObject, QtEventListener):
     def isMined(self):
         return self._is_mined
 
+    @pyqtProperty(bool, notify=detailsChanged)
+    def isRemoved(self):
+        return self._is_removed
+
     @pyqtProperty(str, notify=detailsChanged)
     def mempoolDepth(self):
         return self._mempool_depth
@@ -267,6 +274,20 @@ class QETxDetails(QObject, QtEventListener):
     def update(self, from_txid: bool = False):
         assert self._wallet
 
+        if self._is_removed:
+            self._logger.debug('tx removed, disable gui options')
+            self._can_broadcast = False
+            self._can_bump = False
+            self._can_dscancel = False
+            self._can_cpfp = False
+            self._can_save_as_local = False
+            self._can_remove = False
+            self._can_sign = False
+            self._mempool_depth = ''
+            self._status = _('removed')
+            self.detailsChanged.emit()
+            return
+
         if from_txid:
             self._tx = self._wallet.wallet.db.get_transaction(self._txid)
             assert self._tx is not None, f'unknown txid "{self._txid}"'