history: better handling of None timestamps

electrum/gui/qt/history_list.py

@@ -140,7 +140,6 @@ class HistoryModel(QAbstractItemModel, Logger):
         if is_lightning:
             status = 0
             if timestamp is None:
-                timestamp = sys.maxsize
                 status_str = 'unconfirmed'
             else:
                 status_str = format_time(int(timestamp))
@@ -154,9 +153,10 @@ class HistoryModel(QAbstractItemModel, Logger):
             except KeyError:
                 tx_mined_info = self.tx_mined_info_from_tx_item(tx_item)
                 status, status_str = self.parent.wallet.get_tx_status(tx_hash, tx_mined_info)
-            # we sort by timestamp
-            if conf<=0:
-                timestamp = sys.maxsize
+
+        # we sort by timestamp
+        if timestamp is None:
+            timestamp = float("inf")
 
         if role == Qt.UserRole:
             # for sorting

electrum/lnworker.py

@@ -11,7 +11,6 @@ from typing import Optional, Sequence, Tuple, List, Dict, TYPE_CHECKING
 import threading
 import socket
 import json
-import operator
 from datetime import datetime, timezone
 from functools import partial
 
@@ -197,7 +196,8 @@ class LNWorker(PrintError):
                 'timestamp': closing_timestamp,
             }
             out.append(item)
-        out.sort(key=operator.itemgetter('timestamp'))
+        # sort by timestamp
+        out.sort(key=lambda x: (x.get('timestamp') or float("inf")))
         balance_msat = 0
         for item in out:
             balance_msat += item['amount_msat'] * (1 if item['direction']=='received' else -1)