freqtrade_origin/freqtrade/plugins/pairlist/VolumePairList.py

121 lines
4.4 KiB
Python
Raw Normal View History

2018-11-30 05:34:56 +00:00
"""
2019-03-02 16:24:28 +00:00
Volume PairList provider
2018-11-30 05:34:56 +00:00
2020-05-17 11:26:21 +00:00
Provides dynamic pair list based on trade volumes
"""
2018-11-30 05:34:56 +00:00
import logging
2020-02-02 04:00:40 +00:00
from typing import Any, Dict, List
2019-10-29 09:39:27 +00:00
from cachetools.ttl import TTLCache
from freqtrade.exceptions import OperationalException
from freqtrade.plugins.pairlist.IPairList import IPairList
2019-10-29 09:39:27 +00:00
2020-05-17 11:26:21 +00:00
2018-11-30 05:34:56 +00:00
logger = logging.getLogger(__name__)
2020-05-17 11:26:21 +00:00
SORT_VALUES = ['quoteVolume']
2018-12-04 06:12:56 +00:00
2018-11-30 05:34:56 +00:00
2018-12-05 19:44:56 +00:00
class VolumePairList(IPairList):
2018-11-30 05:34:56 +00:00
2020-05-20 10:27:07 +00:00
def __init__(self, exchange, pairlistmanager,
config: Dict[str, Any], pairlistconfig: Dict[str, Any],
pairlist_pos: int) -> None:
super().__init__(exchange, pairlistmanager, config, pairlistconfig, pairlist_pos)
2019-11-09 05:55:16 +00:00
if 'number_assets' not in self._pairlistconfig:
raise OperationalException(
'`number_assets` not specified. Please check your configuration '
'for "pairlist.config.number_assets"')
2020-05-15 00:59:13 +00:00
self._stake_currency = config['stake_currency']
2019-11-09 05:55:16 +00:00
self._number_pairs = self._pairlistconfig['number_assets']
self._sort_key = self._pairlistconfig.get('sort_key', 'quoteVolume')
self._min_value = self._pairlistconfig.get('min_value', 0)
self._refresh_period = self._pairlistconfig.get('refresh_period', 1800)
self._pair_cache: TTLCache = TTLCache(maxsize=1, ttl=self._refresh_period)
2018-12-04 06:12:56 +00:00
2019-11-09 05:55:16 +00:00
if not self._exchange.exchange_has('fetchTickers'):
raise OperationalException(
2020-05-21 09:41:00 +00:00
'Exchange does not support dynamic whitelist. '
'Please edit your config and restart the bot.'
)
2018-12-05 18:48:50 +00:00
if not self._validate_keys(self._sort_key):
2018-12-04 06:12:56 +00:00
raise OperationalException(
f'key {self._sort_key} not in {SORT_VALUES}')
@property
def needstickers(self) -> bool:
"""
Boolean property defining if tickers are necessary.
2020-11-24 19:24:51 +00:00
If no Pairlist requires tickers, an empty Dict is passed
as tickers argument to filter_pairlist
"""
return True
2018-12-05 18:48:50 +00:00
def _validate_keys(self, key):
2018-12-04 06:12:56 +00:00
return key in SORT_VALUES
2018-12-03 19:31:25 +00:00
def short_desc(self) -> str:
"""
Short whitelist method description - used for startup-messages
"""
2019-11-09 06:07:33 +00:00
return f"{self.name} - top {self._pairlistconfig['number_assets']} volume pairs."
2018-11-30 05:34:56 +00:00
def gen_pairlist(self, tickers: Dict) -> List[str]:
2018-11-30 05:34:56 +00:00
"""
Generate the pairlist
2021-04-19 13:15:40 +00:00
:param tickers: Tickers (from exchange.get_tickers()). May be cached.
:return: List of pairs
2018-11-30 05:34:56 +00:00
"""
# Generate dynamic whitelist
# Must always run if this pairlist is not the first in the list.
pairlist = self._pair_cache.get('pairlist')
if pairlist:
# Item found - no refresh necessary
return pairlist
else:
# Use fresh pairlist
# Check if pair quote currency equals to the stake currency.
2020-05-15 00:59:13 +00:00
filtered_tickers = [
v for k, v in tickers.items()
if (self._exchange.get_pair_quote_currency(k) == self._stake_currency
2020-05-16 06:21:36 +00:00
and v[self._sort_key] is not None)]
pairlist = [s['symbol'] for s in filtered_tickers]
pairlist = self.filter_pairlist(pairlist, tickers)
self._pair_cache['pairlist'] = pairlist
return pairlist
def filter_pairlist(self, pairlist: List[str], tickers: Dict) -> List[str]:
"""
Filters and sorts pairlist and returns the whitelist again.
Called on each bot iteration - please use internal caching if necessary
:param pairlist: pairlist to filter or sort
:param tickers: Tickers (from exchange.get_tickers()). May be cached.
:return: new whitelist
"""
# Use the incoming pairlist.
filtered_tickers = [v for k, v in tickers.items() if k in pairlist]
2020-05-15 00:59:13 +00:00
if self._min_value > 0:
filtered_tickers = [
v for v in filtered_tickers if v[self._sort_key] > self._min_value]
2020-05-15 00:59:13 +00:00
sorted_tickers = sorted(filtered_tickers, reverse=True, key=lambda t: t[self._sort_key])
2019-03-02 16:24:28 +00:00
# Validate whitelist to only have active market pairs
2019-11-09 05:55:16 +00:00
pairs = self._whitelist_for_active_markets([s['symbol'] for s in sorted_tickers])
pairs = self.verify_blacklist(pairs, logger.info)
2020-05-17 11:26:21 +00:00
# Limit pairlist to the requested number of pairs
pairs = pairs[:self._number_pairs]
2020-11-22 10:49:41 +00:00
self.log_once(f"Searching {self._number_pairs} pairs: {pairs}", logger.info)
return pairs