stable/freqtrade/pairlist/IPairList.py

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"""
Static List provider
Provides lists as configured in config.json
"""
import logging
from abc import ABC, abstractmethod, abstractproperty
from copy import deepcopy
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from typing import Dict, List
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from freqtrade.exchange import market_is_active
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logger = logging.getLogger(__name__)
class IPairList(ABC):
def __init__(self, exchange, pairlistmanager, config, pairlistconfig: dict,
pairlist_pos: int) -> None:
"""
:param exchange: Exchange instance
:param pairlistmanager: Instanciating Pairlist manager
:param config: Global bot configuration
:param pairlistconfig: Configuration for this pairlist - can be empty.
:param pairlist_pos: Position of the filter in the pairlist-filter-list
"""
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self._exchange = exchange
self._pairlistmanager = pairlistmanager
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self._config = config
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self._pairlistconfig = pairlistconfig
self._pairlist_pos = pairlist_pos
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@property
def name(self) -> str:
"""
Gets name of the class
-> no need to overwrite in subclasses
"""
return self.__class__.__name__
@abstractproperty
def needstickers(self) -> bool:
"""
Boolean property defining if tickers are necessary.
If no Pairlist requries tickers, an empty List is passed
as tickers argument to filter_pairlist
"""
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@abstractmethod
def short_desc(self) -> str:
"""
Short whitelist method description - used for startup-messages
-> Please overwrite in subclasses
"""
@abstractmethod
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def filter_pairlist(self, pairlist: List[str], tickers: Dict) -> List[str]:
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"""
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Filters and sorts pairlist and returns the whitelist again.
Called on each bot iteration - please use internal caching if necessary
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-> Please overwrite in subclasses
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:param pairlist: pairlist to filter or sort
:param tickers: Tickers (from exchange.get_tickers()). May be cached.
:return: new whitelist
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"""
@staticmethod
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def verify_blacklist(pairlist: List[str], blacklist: List[str]) -> List[str]:
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"""
Verify and remove items from pairlist - returning a filtered pairlist.
"""
for pair in deepcopy(pairlist):
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if pair in blacklist:
logger.warning(f"Pair {pair} in your blacklist. Removing it from whitelist...")
pairlist.remove(pair)
return pairlist
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def _verify_blacklist(self, pairlist: List[str]) -> List[str]:
"""
Proxy method to verify_blacklist for easy access for child classes.
"""
return IPairList.verify_blacklist(pairlist, self._pairlistmanager.blacklist)
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def _whitelist_for_active_markets(self, pairlist: List[str]) -> List[str]:
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"""
Check available markets and remove pair from whitelist if necessary
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:param whitelist: the sorted list of pairs the user might want to trade
:return: the list of pairs the user wants to trade without those unavailable or
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black_listed
"""
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markets = self._exchange.markets
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sanitized_whitelist: List[str] = []
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for pair in pairlist:
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# pair is not in the generated dynamic market or has the wrong stake currency
if (pair not in markets or not pair.endswith(self._config['stake_currency'])):
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logger.warning(f"Pair {pair} is not compatible with exchange "
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f"{self._exchange.name}. Removing it from whitelist..")
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continue
# Check if market is active
market = markets[pair]
if not market_is_active(market):
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logger.info(f"Ignoring {pair} from whitelist. Market is not active.")
continue
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if pair not in sanitized_whitelist:
sanitized_whitelist.append(pair)
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sanitized_whitelist = self._verify_blacklist(sanitized_whitelist)
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# We need to remove pairs that are unknown
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return sanitized_whitelist