customized set_leverage for different exchanges

freqtrade/exchange/binance.py

@@ -153,17 +153,20 @@ class Binance(Exchange):
         return max_lev
 
     @retrier
-    def _set_leverage(self, leverage: float, pair: Optional[str]):
+    def _set_leverage(
+        self,
+        leverage: float,
+        pair: Optional[str],
+        trading_mode: Optional[TradingMode]
+    ):
         """
             Set's the leverage before making a trade, in order to not
             have the same leverage on every trade
         """
-        if not self.exchange_has("setLeverage"):
-            # Some exchanges only support one collateral type
-            return
+        trading_mode = trading_mode or self.trading_mode
 
         try:
-            if self.trading_mode == TradingMode.FUTURES:
+            if trading_mode == TradingMode.FUTURES:
                 self._api.set_leverage(symbol=pair, leverage=leverage)
         except ccxt.DDoSProtection as e:
             raise DDosProtection(e) from e

freqtrade/exchange/exchange.py

@@ -778,7 +778,7 @@ class Exchange:
             return dry_order
 
         if self.trading_mode != TradingMode.SPOT:
-            self._set_leverage(pair, leverage)
+            self._set_leverage(leverage, pair)
         params = self._params.copy()
         if time_in_force != 'gtc' and ordertype != 'market':
             param = self._ft_has.get('time_in_force_parameter', '')
@@ -1602,7 +1602,12 @@ class Exchange:
         return 1.0
 
     @retrier
-    def _set_leverage(self, leverage: float, pair: Optional[str]):
+    def _set_leverage(
+        self,
+        leverage: float,
+        pair: Optional[str],
+        trading_mode: Optional[TradingMode]
+    ):
         """
             Set's the leverage before making a trade, in order to not
             have the same leverage on every trade

freqtrade/exchange/kraken.py

@@ -172,9 +172,17 @@ class Kraken(Exchange):
         """
         return float(max(self._leverage_brackets[pair]))
 
-    def _set_leverage(self, pair, leverage):
+    def _set_leverage(
+        self,
+        leverage: float,
+        pair: Optional[str],
+        trading_mode: Optional[TradingMode]
+    ):
         """
             Kraken set's the leverage as an option in the order object, so we need to
             add it to params
         """
-        self._params['leverage'] = leverage
+        if leverage > 1.0:
+            self._params['leverage'] = leverage
+        else:
+            del self._params['leverage']