removed backtesting stuff, fixed mypy errors

freqtrade/exchange/exchange.py

@@ -1808,7 +1808,7 @@ class Exchange:
         pair: str,
         amount: float,
         open_date: datetime,
-        close_date: datetime
+        close_date: Optional[datetime]
     ) -> float:
         """
             calculates the sum of all funding fees that occurred for a pair during a futures trade
@@ -1820,7 +1820,7 @@ class Exchange:
 
         fees: float = 0
         if close_date:
-            close_date_timestamp = int(close_date.timestamp())
+            close_date_timestamp: Optional[int] = int(close_date.timestamp())
         funding_rate_history = self.get_funding_rate_history(
             pair,
             int(open_date.timestamp()),
@@ -1846,7 +1846,7 @@ class Exchange:
         self,
         pair: str,
         start: int,
-        end: Optional[int]
+        end: Optional[int] = None
     ) -> Dict:
         '''
             :param pair: quote/base currency pair

freqtrade/exchange/gateio.py

@@ -1,6 +1,6 @@
 """ Gate.io exchange subclass """
 import logging
-from typing import Dict, List
+from typing import Dict, List, Optional
 
 from freqtrade.exceptions import OperationalException
 from freqtrade.exchange import Exchange
@@ -36,12 +36,13 @@ class Gateio(Exchange):
 
     def get_funding_rate_history(
         self,
+        pair: str,
         start: int,
-        end: int
+        end: Optional[int] = None
     ) -> Dict:
         '''
             :param start: timestamp in ms of the beginning time
             :param end: timestamp in ms of the end time
         '''
         # TODO-lev: Has a max limit into the past of 333 days
-        return super().get_funding_rate_history(start, end)
+        return super().get_funding_rate_history(pair, start, end)

freqtrade/optimize/backtesting.py

@@ -3,7 +3,6 @@
 """
 This module contains the backtesting logic
 """
-import ccxt
 import logging
 from collections import defaultdict
 from copy import deepcopy
@@ -127,10 +126,6 @@ class Backtesting:
         self.progress = BTProgress()
         self.abort = False
 
-        self.funding_rate_history = getattr(ccxt, self._exchange_name).load_funding_rate_history(
-            self.timerange.startts,
-            self.timerange.stopts
-        )
         self.init_backtest()
 
     def __del__(self):