Added get_interest template method in exchange

freqtrade/exchange/exchange.py

@@ -1573,6 +1573,16 @@ class Exchange:
     def transfer(self, asset: str, amount: float, frm: str, to: str, pair: Optional[str]):
         self._api.transfer(asset, amount, frm, to)
 
+    def get_isolated_liq(self, pair: str, open_rate: float,
+                         amount: float, leverage: float, is_short: bool) -> float:
+        raise OperationalException(
+            f"Isolated margin is not available on {self.name} using freqtrade"
+        )
+
+    def get_interest_rate(self, pair: str, open_rate: float, is_short: bool) -> float:
+        # TODO-mg: implement
+        return 0.0005
+
 
 def is_exchange_known_ccxt(exchange_name: str, ccxt_module: CcxtModuleType = None) -> bool:
     return exchange_name in ccxt_exchanges(ccxt_module)