Merge branch 'freqtrade:develop' into partial_sell2

docs/bot-basics.md

@@ -24,7 +24,7 @@ By default, loop runs every few seconds (`internals.process_throttle_secs`) and
 
 * Fetch open trades from persistence.
 * Calculate current list of tradable pairs.
-* Download ohlcv data for the pairlist including all [informative pairs](strategy-customization.md#get-data-for-non-tradeable-pairs)  
+* Download OHLCV data for the pairlist including all [informative pairs](strategy-customization.md#get-data-for-non-tradeable-pairs)  
   This step is only executed once per Candle to avoid unnecessary network traffic.
 * Call `bot_loop_start()` strategy callback.
 * Analyze strategy per pair.

freqtrade/exchange/gateio.py

@@ -26,8 +26,6 @@ class Gateio(Exchange):
         "stoploss_on_exchange": True,
     }
 
-    _headers = {'X-Gate-Channel-Id': 'freqtrade'}
-
     def validate_ordertypes(self, order_types: Dict) -> None:
         super().validate_ordertypes(order_types)
 

freqtrade/plugins/pairlist/SpreadFilter.py

@@ -4,6 +4,7 @@ Spread pair list filter
 import logging
 from typing import Any, Dict
 
+from freqtrade.exceptions import OperationalException
 from freqtrade.plugins.pairlist.IPairList import IPairList
 
 
@@ -20,6 +21,12 @@ class SpreadFilter(IPairList):
         self._max_spread_ratio = pairlistconfig.get('max_spread_ratio', 0.005)
         self._enabled = self._max_spread_ratio != 0
 
+        if not self._exchange.exchange_has('fetchTickers'):
+            raise OperationalException(
+                'Exchange does not support fetchTickers, therefore SpreadFilter cannot be used.'
+                'Please edit your config and restart the bot.'
+            )
+
     @property
     def needstickers(self) -> bool:
         """

tests/plugins/test_pairlist.py

@@ -782,6 +782,19 @@ def test_gen_pair_whitelist_not_supported(mocker, default_conf, tickers) -> None
         get_patched_freqtradebot(mocker, default_conf)
 
 
+def test_pair_whitelist_not_supported_Spread(mocker, default_conf, tickers) -> None:
+    default_conf['pairlists'] = [{'method': 'StaticPairList'}, {'method': 'SpreadFilter'}]
+
+    mocker.patch.multiple('freqtrade.exchange.Exchange',
+                          get_tickers=tickers,
+                          exchange_has=MagicMock(return_value=False),
+                          )
+
+    with pytest.raises(OperationalException,
+                       match=r'Exchange does not support fetchTickers, .*'):
+        get_patched_freqtradebot(mocker, default_conf)
+
+
 @pytest.mark.parametrize("pairlist", AVAILABLE_PAIRLISTS)
 def test_pairlist_class(mocker, whitelist_conf, markets, pairlist):
     whitelist_conf['pairlists'][0]['method'] = pairlist