feat: add explicit funding_fee_candle_limit for simplified overriding

freqtrade/exchange/exchange.py

@@ -459,15 +459,18 @@ class Exchange:
         Exchange ohlcv candle limit
         Uses ohlcv_candle_limit_per_timeframe if the exchange has different limits
         per timeframe (e.g. bittrex), otherwise falls back to ohlcv_candle_limit
-        TODO: this is most likely no longer needed since only bittrex needed this.
         :param timeframe: Timeframe to check
         :param candle_type: Candle-type
         :param since_ms: Starting timestamp
         :return: Candle limit as integer
         """
+
+        fallback_val = self._ft_has.get("ohlcv_candle_limit")
+        if candle_type == CandleType.FUNDING_RATE:
+            fallback_val = self._ft_has.get("funding_fee_candle_limit", fallback_val)
         return int(
             self._ft_has.get("ohlcv_candle_limit_per_timeframe", {}).get(
-                timeframe, str(self._ft_has.get("ohlcv_candle_limit"))
+                timeframe, str(fallback_val)
             )
         )
 

freqtrade/exchange/exchange_types.py

@@ -42,6 +42,7 @@ class FtHas(TypedDict, total=False):
     mark_ohlcv_price: str
     mark_ohlcv_timeframe: str
     funding_fee_timeframe: str
+    funding_fee_candle_limit: int
     floor_leverage: bool
     needs_trading_fees: bool
     order_props_in_contracts: list[Literal["amount", "cost", "filled", "remaining"]]