exchange minor fixes

freqtrade/exchange/exchange.py

@@ -2269,11 +2269,11 @@ class Exchange:
             raise OperationalException(
                 "Freqtrade only supports isolated futures for leverage trading")
 
-        def get_maintenance_ratio_and_amt(
-            self,
-            pair: str,
-            nominal_value: Optional[float] = 0.0,
-        ) -> Tuple[float, Optional[float]]:
+    def get_maintenance_ratio_and_amt(
+        self,
+        pair: str,
+        nominal_value: Optional[float] = 0.0,
+    ) -> Tuple[float, Optional[float]]:
         """
         :param pair: Market symbol
         :param nominal_value: The total trade amount in quote currency including leverage

tests/test_freqtradebot.py

@@ -782,6 +782,10 @@ def test_execute_entry(mocker, default_conf_usdt, fee, limit_order,
         name=exchange_name,
         get_maintenance_ratio_and_amt=MagicMock(return_value=(0.01, 0.01)),
     )
+    mocker.patch.multiple(
+        'freqtrade.exchange.Okex',
+        get_max_pair_stake_amount=MagicMock(return_value=500000),
+    )
     pair = 'ETH/USDT'
 
     assert not freqtrade.execute_entry(pair, stake_amount, is_short=is_short)