Align coinbase download with ccxt limits

Align with https://github.com/ccxt/ccxt/issues/9268

freqtrade/exchange/__init__.py

@@ -7,6 +7,7 @@ from freqtrade.exchange.bibox import Bibox
 from freqtrade.exchange.binance import Binance
 from freqtrade.exchange.bittrex import Bittrex
 from freqtrade.exchange.bybit import Bybit
+from freqtrade.exchange.coinbasepro import Coinbasepro
 from freqtrade.exchange.exchange import (available_exchanges, ccxt_exchanges,
                                          is_exchange_known_ccxt, is_exchange_officially_supported,
                                          market_is_active, timeframe_to_minutes, timeframe_to_msecs,

freqtrade/exchange/bybit.py

@@ -18,7 +18,6 @@ class Bybit(Exchange):
     may still not work as expected.
     """
 
-    # fetchCurrencies API point requires authentication for Bybit,
     _ft_has: Dict = {
         "ohlcv_candle_limit": 200,
     }

freqtrade/exchange/coinbasepro.py

@@ -0,0 +1,23 @@
+""" CoinbasePro exchange subclass """
+import logging
+from typing import Dict
+
+from freqtrade.exchange import Exchange
+
+
+logger = logging.getLogger(__name__)
+
+
+class Coinbasepro(Exchange):
+    """
+    CoinbasePro exchange class. Contains adjustments needed for Freqtrade to work
+    with this exchange.
+
+    Please note that this exchange is not included in the list of exchanges
+    officially supported by the Freqtrade development team. So some features
+    may still not work as expected.
+    """
+
+    _ft_has: Dict = {
+        "ohlcv_candle_limit": 300,
+    }

freqtrade/exchange/hitbtc.py

@@ -17,7 +17,6 @@ class Hitbtc(Exchange):
     may still not work as expected.
     """
 
-    # fetchCurrencies API point requires authentication for Hitbtc,
     _ft_has: Dict = {
         "ohlcv_candle_limit": 1000,
         "ohlcv_params": {"sort": "DESC"}