Added backtesting methods back in

freqtrade/exchange/ftx.py

@@ -1,6 +1,7 @@
 """ FTX exchange subclass """
 import logging
-from typing import Any, Dict, List, Tuple
+from datetime import datetime
+from typing import Any, Dict, List, Optional, Tuple
 
 import ccxt
 
@@ -168,3 +169,40 @@ class Ftx(Exchange):
         if order['type'] == 'stop':
             return safe_value_fallback2(order, order, 'id_stop', 'id')
         return order['id']
+
+    def fill_leverage_brackets(self):
+        """
+            FTX leverage is static across the account, and doesn't change from pair to pair,
+            so _leverage_brackets doesn't need to be set
+        """
+        return
+
+    def get_max_leverage(self, pair: Optional[str], nominal_value: Optional[float]) -> float:
+        """
+            Returns the maximum leverage that a pair can be traded at, which is always 20 on ftx
+            :param pair: Here for super method, not used on FTX
+            :nominal_value: Here for super method, not used on FTX
+        """
+        return 20.0
+
+    def _get_funding_rate(self, pair: str, when: datetime) -> Optional[float]:
+        """FTX doesn't use this"""
+        return None
+
+    def _get_funding_fee(
+        self,
+        pair: str,
+        contract_size: float,
+        mark_price: float,
+        premium_index: Optional[float],
+        # index_price: float,
+        # interest_rate: float)
+    ) -> float:
+        """
+            Calculates a single funding fee
+            Always paid in USD on FTX  # TODO: How do we account for this
+            : param contract_size: The amount/quanity
+            : param mark_price: The price of the asset that the contract is based off of
+            : param funding_rate: Must be None on ftx
+        """
+        return (contract_size * mark_price) / 24