Improve handling of order cancelation failures with force_exit

closes #8708

freqtrade/rpc/rpc.py

@@ -755,7 +755,7 @@ class RPC:
         return {'status': 'Reloaded from orders from exchange'}
 
     def __exec_force_exit(self, trade: Trade, ordertype: Optional[str],
-                          amount: Optional[float] = None) -> None:
+                          amount: Optional[float] = None) -> bool:
         # Check if there is there is an open order
         fully_canceled = False
         if trade.open_order_id:
@@ -770,6 +770,9 @@ class RPC:
                 self._freqtrade.handle_cancel_exit(trade, order, CANCEL_REASON['FORCE_EXIT'])
 
         if not fully_canceled:
+            if trade.open_order_id is not None:
+                # Order cancellation failed, so we can't exit.
+                return False
             # Get current rate and execute sell
             current_rate = self._freqtrade.exchange.get_rate(
                 trade.pair, side='exit', is_short=trade.is_short, refresh=True)
@@ -790,6 +793,9 @@ class RPC:
                 trade, current_rate, exit_check, ordertype=order_type,
                 sub_trade_amt=sub_amount)
 
+            return True
+        return False
+
     def _rpc_force_exit(self, trade_id: str, ordertype: Optional[str] = None, *,
                         amount: Optional[float] = None) -> Dict[str, str]:
         """
@@ -817,9 +823,11 @@ class RPC:
                 logger.warning('force_exit: Invalid argument received')
                 raise RPCException('invalid argument')
 
-            self.__exec_force_exit(trade, ordertype, amount)
+            result = self.__exec_force_exit(trade, ordertype, amount)
             Trade.commit()
             self._freqtrade.wallets.update()
+            if not result:
+                raise RPCException('Failed to exit trade.')
             return {'result': f'Created exit order for trade {trade_id}.'}
 
     def _force_entry_validations(self, pair: str, order_side: SignalDirection):

tests/rpc/test_rpc.py

@@ -765,7 +765,7 @@ def test_rpc_force_exit(default_conf, ticker, fee, mocker) -> None:
     cancel_order_mock.reset_mock()
     trade = Trade.session.scalars(select(Trade).filter(Trade.id == '3')).first()
     amount = trade.amount
-    # make an limit-sell open trade
+    # make an limit-sell open order trade
     mocker.patch(
         f'{EXMS}.fetch_order',
         return_value={
@@ -778,12 +778,24 @@ def test_rpc_force_exit(default_conf, ticker, fee, mocker) -> None:
             'id': trade.orders[0].order_id,
         }
     )
+    cancel_order_3 = mocker.patch(
+        f'{EXMS}.cancel_order_with_result',
+        return_value={
+            'status': 'canceled',
+            'type': 'limit',
+            'side': 'sell',
+            'amount': amount,
+            'remaining': amount,
+            'filled': 0.0,
+            'id': trade.orders[0].order_id,
+        }
+    )
     msg = rpc._rpc_force_exit('3')
     assert msg == {'result': 'Created exit order for trade 3.'}
     # status quo, no exchange calls
-    assert cancel_order_mock.call_count == 1
+    assert cancel_order_3.call_count == 1
+    assert cancel_order_mock.call_count == 0
 
-    cancel_order_mock.reset_mock()
     trade = Trade.session.scalars(select(Trade).filter(Trade.id == '2')).first()
     amount = trade.amount
     # make an limit-buy open trade, if there is no 'filled', don't sell it
@@ -796,10 +808,23 @@ def test_rpc_force_exit(default_conf, ticker, fee, mocker) -> None:
             'filled': None
         }
     )
+    cancel_order_4 = mocker.patch(
+            f'{EXMS}.cancel_order_with_result',
+            return_value={
+                'status': 'canceled',
+                'type': 'limit',
+                'side': 'sell',
+                'amount': amount,
+                'remaining': 0.0,
+                'filled': amount,
+                'id': trade.orders[0].order_id,
+                }
+            )
     # check that the trade is called, which is done by ensuring exchange.cancel_order is called
     msg = rpc._rpc_force_exit('4')
     assert msg == {'result': 'Created exit order for trade 4.'}
-    assert cancel_order_mock.call_count == 1
+    assert cancel_order_4.call_count == 1
+    assert cancel_order_mock.call_count == 0
     assert trade.amount == amount