Verify if fee for this side has been updated

freqtrade/freqtradebot.py

@@ -1174,7 +1174,7 @@ class FreqtradeBot:
         if order_amount is None:
             order_amount = order['amount']
         # Only run for closed orders
-        if trade.fee_open_currency is not None or order['status'] == 'open':
+        if trade.fee_updated(order['side']) or order['status'] == 'open':
             return order_amount
 
         trade_base_currency = self.exchange.get_pair_base_currency(trade.pair)

freqtrade/persistence.py

@@ -394,6 +394,15 @@ class Trade(_DECL_BASE):
             if fee_rate is not None:
                 self.fee_close = fee_rate
 
+    def fee_updated(self, side: str) -> bool:
+        """
+        Verify if this side (buy / sell) has already been updated
+        """
+        if side == 'buy':
+            return self.fee_open_currency is not None
+        elif side == 'sell':
+            return self.fee_close_currency is not None
+
     def _calc_open_trade_price(self) -> float:
         """
         Calculate the open_rate including open_fee.

tests/test_persistence.py

@@ -890,8 +890,12 @@ def test_update_fee(fee):
     fee_currency = 'BTC'
     fee_rate = 0.0075
     assert trade.fee_open_currency is None
+    assert not trade.fee_updated('buy')
+    assert not trade.fee_updated('sell')
 
     trade.update_fee(fee_cost, fee_currency, fee_rate, 'buy')
+    assert trade.fee_updated('buy')
+    assert not trade.fee_updated('sell')
     assert trade.fee_open_currency == fee_currency
     assert trade.fee_open_cost == fee_cost
     assert trade.fee_open == fee_rate
@@ -902,6 +906,8 @@ def test_update_fee(fee):
 
     fee_rate = 0.0076
     trade.update_fee(fee_cost, fee_currency, fee_rate, 'sell')
+    assert trade.fee_updated('buy')
+    assert trade.fee_updated('sell')
     assert trade.fee_close == 0.0076
     assert trade.fee_close_cost == fee_cost
     assert trade.fee_close == fee_rate