Use correct order_id for ftx

closes #4511

freqtrade/exchange/ftx.py

@@ -8,6 +8,7 @@ from freqtrade.exceptions import (DDosProtection, InsufficientFundsError, Invali
                                   OperationalException, TemporaryError)
 from freqtrade.exchange import Exchange
 from freqtrade.exchange.common import API_FETCH_ORDER_RETRY_COUNT, retrier
+from freqtrade.misc import safe_value_fallback2
 
 
 logger = logging.getLogger(__name__)
@@ -135,3 +136,8 @@ class Ftx(Exchange):
                 f'Could not cancel order due to {e.__class__.__name__}. Message: {e}') from e
         except ccxt.BaseError as e:
             raise OperationalException(e) from e
+
+    def get_order_id_conditional(self, order: Dict[str, Any]) -> str:
+        if order['type'] == 'stop':
+            return safe_value_fallback2(order['info'], order, 'orderId', 'id')
+        return order['id']