qml: TxListModel: don't rely on wallet.db.get_transaction() finding tx

tx might get removed from wallet after wallet.get_full_history() but before the model is populated

closes https://github.com/spesmilo/electrum/issues/8339

electrum/gui/qml/qetransactionlistmodel.py

@@ -1,5 +1,5 @@
 from datetime import datetime, timedelta
-from typing import TYPE_CHECKING
+from typing import TYPE_CHECKING, Dict, Any
 
 from PyQt5.QtCore import pyqtProperty, pyqtSignal, pyqtSlot, QObject
 from PyQt5.QtCore import Qt, QAbstractListModel, QModelIndex
@@ -97,9 +97,9 @@ class QETransactionListModel(QAbstractListModel, QtEventListener):
         self.tx_history = []
         self.endResetModel()
 
-    def tx_to_model(self, tx):
-        #self._logger.debug(str(tx))
-        item = tx
+    def tx_to_model(self, tx_item):
+        #self._logger.debug(str(tx_item))
+        item = tx_item
 
         item['key'] = item['txid'] if 'txid' in item else item['payment_hash']
 
@@ -118,15 +118,19 @@ class QETransactionListModel(QAbstractListModel, QtEventListener):
 
         if 'txid' in item:
             tx = self.wallet.db.get_transaction(item['txid'])
-            assert tx is not None
+            if tx:
                 item['complete'] = tx.is_complete()
+            else:  # due to races, tx might have already been removed from history
+                item['complete'] = False
 
         # newly arriving txs, or (partially/fully signed) local txs have no (block) timestamp
         # FIXME just use wallet.get_tx_status, and change that as needed
         if not item['timestamp']:  # onchain: local or mempool or unverified txs
-            txinfo = self.wallet.get_tx_info(tx)
-            item['section'] = 'mempool' if item['complete'] and not txinfo.can_broadcast else 'local'
-            status, status_str = self.wallet.get_tx_status(item['txid'], txinfo.tx_mined_status)
+            txid = item['txid']
+            assert txid
+            tx_mined_info = self._tx_mined_info_from_tx_item(tx_item)
+            item['section'] = 'local' if tx_mined_info.is_local_like() else 'mempool'
+            status, status_str = self.wallet.get_tx_status(txid, tx_mined_info=tx_mined_info)
             item['date'] = status_str
         else:  # lightning or already mined (and SPV-ed) onchain txs
             item['section'] = self.get_section_by_timestamp(item['timestamp'])
@@ -162,6 +166,17 @@ class QETransactionListModel(QAbstractListModel, QtEventListener):
             section = 'older'
         return date.strftime(dfmt[section])
 
+    @staticmethod
+    def _tx_mined_info_from_tx_item(tx_item: Dict[str, Any]) -> TxMinedInfo:
+        # FIXME a bit hackish to have to reconstruct the TxMinedInfo... same thing in qt-gui
+        tx_mined_info = TxMinedInfo(
+            height=tx_item['height'],
+            conf=tx_item['confirmations'],
+            timestamp=tx_item['timestamp'],
+            wanted_height=tx_item.get('wanted_height', None),
+        )
+        return tx_mined_info
+
     # initial model data
     @pyqtSlot()
     @pyqtSlot(bool)

electrum/gui/qt/history_list.py

@@ -28,7 +28,7 @@ import sys
 import time
 import datetime
 from datetime import date
-from typing import TYPE_CHECKING, Tuple, Dict
+from typing import TYPE_CHECKING, Tuple, Dict, Any
 import threading
 import enum
 from decimal import Decimal
@@ -128,7 +128,7 @@ class HistoryNode(CustomNode):
             try:
                 status, status_str = self.model.tx_status_cache[tx_hash]
             except KeyError:
-                tx_mined_info = self.model.tx_mined_info_from_tx_item(tx_item)
+                tx_mined_info = self.model._tx_mined_info_from_tx_item(tx_item)
                 status, status_str = window.wallet.get_tx_status(tx_hash, tx_mined_info)
 
         if role == ROLE_SORT_ORDER:
@@ -353,7 +353,7 @@ class HistoryModel(CustomModel, Logger):
         self.tx_status_cache.clear()
         for txid, tx_item in self.transactions.items():
             if not tx_item.get('lightning', False):
-                tx_mined_info = self.tx_mined_info_from_tx_item(tx_item)
+                tx_mined_info = self._tx_mined_info_from_tx_item(tx_item)
                 self.tx_status_cache[txid] = self.window.wallet.get_tx_status(txid, tx_mined_info)
         # update counter
         num_tx = len(self.transactions)
@@ -404,7 +404,7 @@ class HistoryModel(CustomModel, Logger):
         for tx_hash, tx_item in list(self.transactions.items()):
             if tx_item.get('lightning'):
                 continue
-            tx_mined_info = self.tx_mined_info_from_tx_item(tx_item)
+            tx_mined_info = self._tx_mined_info_from_tx_item(tx_item)
             if tx_mined_info.conf > 0:
                 # note: we could actually break here if we wanted to rely on the order of txns in self.transactions
                 continue
@@ -441,8 +441,8 @@ class HistoryModel(CustomModel, Logger):
         return super().flags(idx) | int(extra_flags)
 
     @staticmethod
-    def tx_mined_info_from_tx_item(tx_item):
-        # FIXME a bit hackish to have to reconstruct the TxMinedInfo...
+    def _tx_mined_info_from_tx_item(tx_item: Dict[str, Any]) -> TxMinedInfo:
+        # FIXME a bit hackish to have to reconstruct the TxMinedInfo... same thing in qml-gui
         tx_mined_info = TxMinedInfo(
             height=tx_item['height'],
             conf=tx_item['confirmations'],

electrum/util.py

@@ -1340,6 +1340,15 @@ class TxMinedInfo(NamedTuple):
             return f"{self.height}x{self.txpos}"
         return None
 
+    def is_local_like(self) -> bool:
+        """Returns whether the tx is local-like (LOCAL/FUTURE)."""
+        from .address_synchronizer import TX_HEIGHT_UNCONFIRMED, TX_HEIGHT_UNCONF_PARENT
+        if self.height > 0:
+            return False
+        if self.height in (TX_HEIGHT_UNCONFIRMED, TX_HEIGHT_UNCONF_PARENT):
+            return False
+        return True
+
 
 class ShortID(bytes):