diff --git a/freqtrade/plugins/pairlist/SpreadFilter.py b/freqtrade/plugins/pairlist/SpreadFilter.py index ad0c0f0be..d1f88d2a5 100644 --- a/freqtrade/plugins/pairlist/SpreadFilter.py +++ b/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: """ diff --git a/tests/plugins/test_pairlist.py b/tests/plugins/test_pairlist.py index 52158a889..346bf1792 100644 --- a/tests/plugins/test_pairlist.py +++ b/tests/plugins/test_pairlist.py @@ -782,6 +782,18 @@ 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