Move leverage_prep calculations to exchange class

freqtrade/freqtradebot.py

@@ -578,42 +578,6 @@ class FreqtradeBot(LoggingMixin):
             logger.info(f"Bids to asks delta for {pair} does not satisfy condition.")
             return False
 
-    def leverage_prep(
-        self,
-        pair: str,
-        open_rate: float,
-        amount: float,  # quote currency, includes leverage
-        leverage: float,
-        is_short: bool
-    ) -> Tuple[float, Optional[float]]:
-
-        # if TradingMode == TradingMode.MARGIN:
-        #     interest_rate = self.exchange.get_interest_rate(
-        #         pair=pair,
-        #         open_rate=open_rate,
-        #         is_short=is_short
-        #     )
-        if self.trading_mode == TradingMode.SPOT:
-            return (0.0, None)
-        elif (
-            self.margin_mode == MarginMode.ISOLATED and
-            self.trading_mode == TradingMode.FUTURES
-        ):
-            wallet_balance = (amount * open_rate)/leverage
-            isolated_liq = self.exchange.get_liquidation_price(
-                pair=pair,
-                open_rate=open_rate,
-                is_short=is_short,
-                position=amount,
-                wallet_balance=wallet_balance,
-                mm_ex_1=0.0,
-                upnl_ex_1=0.0,
-            )
-            return (0.0, isolated_liq)
-        else:
-            raise OperationalException(
-                "Freqtrade only supports isolated futures for leverage trading")
-
     def execute_entry(
         self,
         pair: str,
@@ -724,7 +688,7 @@ class FreqtradeBot(LoggingMixin):
             amount = safe_value_fallback(order, 'filled', 'amount')
             enter_limit_filled_price = safe_value_fallback(order, 'average', 'price')
 
-        interest_rate, isolated_liq = self.leverage_prep(
+        interest_rate, isolated_liq = self.exchange.leverage_prep(
             leverage=leverage,
             pair=pair,
             amount=amount,