Added funding_fee method headers to exchange, and implemented some of the methods

freqtrade/exchange/kraken.py

@@ -3,12 +3,12 @@ import logging
 from typing import Any, Dict, List
 
 import ccxt
-from datetime import time
+
 from freqtrade.exceptions import (DDosProtection, InsufficientFundsError, InvalidOrderException,
                                   OperationalException, TemporaryError)
 from freqtrade.exchange import Exchange
 from freqtrade.exchange.common import retrier
-from freqtrade.utils import hours_to_time
+
 
 logger = logging.getLogger(__name__)
 
@@ -22,7 +22,7 @@ class Kraken(Exchange):
         "trades_pagination": "id",
         "trades_pagination_arg": "since",
     }
-    funding_fee_times: List[time] = hours_to_time([0, 4, 8, 12, 16, 20])
+    funding_fee_times: List[int] = [0, 4, 8, 12, 16, 20]  # hours of the day
 
     def market_is_tradable(self, market: Dict[str, Any]) -> bool:
         """