650 lines
26 KiB
Python
650 lines
26 KiB
Python
"""
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Freqtrade is the main module of this bot. It contains the class Freqtrade()
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"""
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import copy
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import logging
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import time
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import traceback
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from datetime import datetime
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from typing import Any, Callable, Dict, List, Optional
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import arrow
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import requests
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from cachetools import TTLCache, cached
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from freqtrade import (DependencyException, OperationalException,
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TemporaryError, __version__, constants, persistence)
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from freqtrade.exchange import Exchange
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from freqtrade.persistence import Trade
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from freqtrade.rpc import RPCManager, RPCMessageType
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from freqtrade.state import State
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from freqtrade.strategy.interface import SellType
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from freqtrade.strategy.resolver import IStrategy, StrategyResolver
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logger = logging.getLogger(__name__)
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class FreqtradeBot(object):
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"""
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Freqtrade is the main class of the bot.
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This is from here the bot start its logic.
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"""
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def __init__(self, config: Dict[str, Any])-> None:
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"""
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Init all variables and object the bot need to work
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:param config: configuration dict, you can use the Configuration.get_config()
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method to get the config dict.
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"""
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logger.info(
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'Starting freqtrade %s',
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__version__,
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)
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# Init bot states
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self.state = State.STOPPED
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# Init objects
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self.config = config
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self.strategy: IStrategy = StrategyResolver(self.config).strategy
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self.rpc: RPCManager = RPCManager(self)
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self.persistence = None
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self.exchange = Exchange(self.config)
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self._init_modules()
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def _init_modules(self) -> None:
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"""
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Initializes all modules and updates the config
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:return: None
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"""
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# Initialize all modules
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persistence.init(self.config)
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# Set initial application state
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initial_state = self.config.get('initial_state')
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if initial_state:
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self.state = State[initial_state.upper()]
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else:
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self.state = State.STOPPED
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def cleanup(self) -> None:
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"""
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Cleanup pending resources on an already stopped bot
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:return: None
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"""
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logger.info('Cleaning up modules ...')
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self.rpc.cleanup()
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persistence.cleanup()
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def worker(self, old_state: State = None) -> State:
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"""
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Trading routine that must be run at each loop
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:param old_state: the previous service state from the previous call
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:return: current service state
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"""
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# Log state transition
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state = self.state
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if state != old_state:
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self.rpc.send_msg({
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'type': RPCMessageType.STATUS_NOTIFICATION,
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'status': f'{state.name.lower()}'
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})
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logger.info('Changing state to: %s', state.name)
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if state == State.STOPPED:
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time.sleep(1)
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elif state == State.RUNNING:
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min_secs = self.config.get('internals', {}).get(
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'process_throttle_secs',
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constants.PROCESS_THROTTLE_SECS
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)
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nb_assets = self.config.get('dynamic_whitelist', None)
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self._throttle(func=self._process,
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min_secs=min_secs,
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nb_assets=nb_assets)
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return state
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def _throttle(self, func: Callable[..., Any], min_secs: float, *args, **kwargs) -> Any:
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"""
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Throttles the given callable that it
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takes at least `min_secs` to finish execution.
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:param func: Any callable
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:param min_secs: minimum execution time in seconds
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:return: Any
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"""
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start = time.time()
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result = func(*args, **kwargs)
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end = time.time()
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duration = max(min_secs - (end - start), 0.0)
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logger.debug('Throttling %s for %.2f seconds', func.__name__, duration)
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time.sleep(duration)
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return result
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def _process(self, nb_assets: Optional[int] = 0) -> bool:
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"""
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Queries the persistence layer for open trades and handles them,
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otherwise a new trade is created.
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:param: nb_assets: the maximum number of pairs to be traded at the same time
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:return: True if one or more trades has been created or closed, False otherwise
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"""
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state_changed = False
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try:
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# Refresh whitelist based on wallet maintenance
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sanitized_list = self._refresh_whitelist(
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self._gen_pair_whitelist(
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self.config['stake_currency']
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) if nb_assets else self.config['exchange']['pair_whitelist']
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)
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# Keep only the subsets of pairs wanted (up to nb_assets)
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final_list = sanitized_list[:nb_assets] if nb_assets else sanitized_list
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self.config['exchange']['pair_whitelist'] = final_list
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# Query trades from persistence layer
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trades = Trade.query.filter(Trade.is_open.is_(True)).all()
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# First process current opened trades
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for trade in trades:
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state_changed |= self.process_maybe_execute_sell(trade)
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# Then looking for buy opportunities
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if len(trades) < self.config['max_open_trades']:
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state_changed = self.process_maybe_execute_buy()
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if 'unfilledtimeout' in self.config:
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# Check and handle any timed out open orders
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self.check_handle_timedout()
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Trade.session.flush()
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except TemporaryError as error:
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logger.warning('%s, retrying in 30 seconds...', error)
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time.sleep(constants.RETRY_TIMEOUT)
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except OperationalException:
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tb = traceback.format_exc()
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hint = 'Issue `/start` if you think it is safe to restart.'
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self.rpc.send_msg({
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'type': RPCMessageType.STATUS_NOTIFICATION,
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'status': f'OperationalException:\n```\n{tb}```{hint}'
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})
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logger.exception('OperationalException. Stopping trader ...')
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self.state = State.STOPPED
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return state_changed
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@cached(TTLCache(maxsize=1, ttl=1800))
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def _gen_pair_whitelist(self, base_currency: str, key: str = 'quoteVolume') -> List[str]:
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"""
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Updates the whitelist with with a dynamically generated list
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:param base_currency: base currency as str
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:param key: sort key (defaults to 'quoteVolume')
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:return: List of pairs
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"""
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if not self.exchange.exchange_has('fetchTickers'):
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raise OperationalException(
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'Exchange does not support dynamic whitelist.'
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'Please edit your config and restart the bot'
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)
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tickers = self.exchange.get_tickers()
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# check length so that we make sure that '/' is actually in the string
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tickers = [v for k, v in tickers.items()
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if len(k.split('/')) == 2 and k.split('/')[1] == base_currency]
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sorted_tickers = sorted(tickers, reverse=True, key=lambda t: t[key])
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pairs = [s['symbol'] for s in sorted_tickers]
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return pairs
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def _refresh_whitelist(self, whitelist: List[str]) -> List[str]:
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"""
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Check available markets and remove pair from whitelist if necessary
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:param whitelist: the sorted list (based on BaseVolume) of pairs the user might want to
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trade
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:return: the list of pairs the user wants to trade without the one unavailable or
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black_listed
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"""
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sanitized_whitelist = whitelist
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markets = self.exchange.get_markets()
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markets = [m for m in markets if m['quote'] == self.config['stake_currency']]
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known_pairs = set()
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for market in markets:
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pair = market['symbol']
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# pair is not int the generated dynamic market, or in the blacklist ... ignore it
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if pair not in whitelist or pair in self.config['exchange'].get('pair_blacklist', []):
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continue
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# else the pair is valid
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known_pairs.add(pair)
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# Market is not active
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if not market['active']:
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sanitized_whitelist.remove(pair)
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logger.info(
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'Ignoring %s from whitelist. Market is not active.',
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pair
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)
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# We need to remove pairs that are unknown
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final_list = [x for x in sanitized_whitelist if x in known_pairs]
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return final_list
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def get_target_bid(self, ticker: Dict[str, float]) -> float:
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"""
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Calculates bid target between current ask price and last price
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:param ticker: Ticker to use for getting Ask and Last Price
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:return: float: Price
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"""
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if ticker['ask'] < ticker['last']:
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return ticker['ask']
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balance = self.config['bid_strategy']['ask_last_balance']
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return ticker['ask'] + balance * (ticker['last'] - ticker['ask'])
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def _get_trade_stake_amount(self) -> Optional[float]:
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"""
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Check if stake amount can be fulfilled with the available balance
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for the stake currency
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:return: float: Stake Amount
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"""
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stake_amount = self.config['stake_amount']
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avaliable_amount = self.exchange.get_balance(self.config['stake_currency'])
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if stake_amount == constants.UNLIMITED_STAKE_AMOUNT:
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open_trades = len(Trade.query.filter(Trade.is_open.is_(True)).all())
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if open_trades >= self.config['max_open_trades']:
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logger.warning('Can\'t open a new trade: max number of trades is reached')
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return None
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return avaliable_amount / (self.config['max_open_trades'] - open_trades)
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# Check if stake_amount is fulfilled
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if avaliable_amount < stake_amount:
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raise DependencyException(
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'Available balance(%f %s) is lower than stake amount(%f %s)' % (
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avaliable_amount, self.config['stake_currency'],
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stake_amount, self.config['stake_currency'])
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)
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return stake_amount
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def _get_min_pair_stake_amount(self, pair: str, price: float) -> Optional[float]:
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markets = self.exchange.get_markets()
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markets = [m for m in markets if m['symbol'] == pair]
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if not markets:
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raise ValueError(f'Can\'t get market information for symbol {pair}')
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market = markets[0]
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if 'limits' not in market:
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return None
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min_stake_amounts = []
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limits = market['limits']
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if ('cost' in limits and 'min' in limits['cost']
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and limits['cost']['min'] is not None):
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min_stake_amounts.append(limits['cost']['min'])
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if ('amount' in limits and 'min' in limits['amount']
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and limits['amount']['min'] is not None):
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min_stake_amounts.append(limits['amount']['min'] * price)
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if not min_stake_amounts:
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return None
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amount_reserve_percent = 1 - 0.05 # reserve 5% + stoploss
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if self.strategy.stoploss is not None:
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amount_reserve_percent += self.strategy.stoploss
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# it should not be more than 50%
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amount_reserve_percent = max(amount_reserve_percent, 0.5)
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return min(min_stake_amounts)/amount_reserve_percent
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def create_trade(self) -> bool:
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"""
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Checks the implemented trading indicator(s) for a randomly picked pair,
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if one pair triggers the buy_signal a new trade record gets created
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:return: True if a trade object has been created and persisted, False otherwise
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"""
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interval = self.strategy.ticker_interval
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stake_amount = self._get_trade_stake_amount()
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if not stake_amount:
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return False
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logger.info(
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'Checking buy signals to create a new trade with stake_amount: %f ...',
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stake_amount
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)
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whitelist = copy.deepcopy(self.config['exchange']['pair_whitelist'])
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# Remove currently opened and latest pairs from whitelist
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for trade in Trade.query.filter(Trade.is_open.is_(True)).all():
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if trade.pair in whitelist:
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whitelist.remove(trade.pair)
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logger.debug('Ignoring %s in pair whitelist', trade.pair)
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if not whitelist:
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raise DependencyException('No currency pairs in whitelist')
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# Pick pair based on buy signals
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for _pair in whitelist:
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(buy, sell) = self.strategy.get_signal(self.exchange, _pair, interval)
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if buy and not sell:
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return self.execute_buy(_pair, stake_amount)
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return False
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def execute_buy(self, pair: str, stake_amount: float) -> bool:
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"""
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Executes a limit buy for the given pair
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:param pair: pair for which we want to create a LIMIT_BUY
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:return: None
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"""
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pair_s = pair.replace('_', '/')
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pair_url = self.exchange.get_pair_detail_url(pair)
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stake_currency = self.config['stake_currency']
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fiat_currency = self.config.get('fiat_display_currency', None)
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# Calculate amount
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buy_limit = self.get_target_bid(self.exchange.get_ticker(pair))
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min_stake_amount = self._get_min_pair_stake_amount(pair_s, buy_limit)
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if min_stake_amount is not None and min_stake_amount > stake_amount:
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logger.warning(
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f'Can\'t open a new trade for {pair_s}: stake amount'
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f' is too small ({stake_amount} < {min_stake_amount})'
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)
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return False
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amount = stake_amount / buy_limit
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order_id = self.exchange.buy(pair, buy_limit, amount)['id']
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self.rpc.send_msg({
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'type': RPCMessageType.BUY_NOTIFICATION,
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'exchange': self.exchange.name.capitalize(),
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'pair': pair_s,
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'market_url': pair_url,
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'limit': buy_limit,
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'stake_amount': stake_amount,
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'stake_currency': stake_currency,
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'fiat_currency': fiat_currency
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})
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# Fee is applied twice because we make a LIMIT_BUY and LIMIT_SELL
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fee = self.exchange.get_fee(symbol=pair, taker_or_maker='maker')
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trade = Trade(
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pair=pair,
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stake_amount=stake_amount,
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amount=amount,
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fee_open=fee,
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fee_close=fee,
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open_rate=buy_limit,
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open_rate_requested=buy_limit,
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open_date=datetime.utcnow(),
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exchange=self.exchange.id,
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open_order_id=order_id,
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strategy=self.strategy.get_strategy_name(),
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ticker_interval=constants.TICKER_INTERVAL_MINUTES[self.config['ticker_interval']]
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)
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Trade.session.add(trade)
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Trade.session.flush()
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return True
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def process_maybe_execute_buy(self) -> bool:
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"""
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Tries to execute a buy trade in a safe way
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:return: True if executed
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"""
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try:
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# Create entity and execute trade
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if self.create_trade():
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return True
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logger.info('Found no buy signals for whitelisted currencies. Trying again..')
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return False
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except DependencyException as exception:
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logger.warning('Unable to create trade: %s', exception)
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return False
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def process_maybe_execute_sell(self, trade: Trade) -> bool:
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"""
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Tries to execute a sell trade
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:return: True if executed
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"""
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try:
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# Get order details for actual price per unit
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if trade.open_order_id:
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# Update trade with order values
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logger.info('Found open order for %s', trade)
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order = self.exchange.get_order(trade.open_order_id, trade.pair)
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# Try update amount (binance-fix)
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try:
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new_amount = self.get_real_amount(trade, order)
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if order['amount'] != new_amount:
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order['amount'] = new_amount
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# Fee was applied, so set to 0
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trade.fee_open = 0
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except OperationalException as exception:
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logger.warning("could not update trade amount: %s", exception)
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trade.update(order)
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if trade.is_open and trade.open_order_id is None:
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# Check if we can sell our current pair
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return self.handle_trade(trade)
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except DependencyException as exception:
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logger.warning('Unable to sell trade: %s', exception)
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return False
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def get_real_amount(self, trade: Trade, order: Dict) -> float:
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"""
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Get real amount for the trade
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Necessary for self.exchanges which charge fees in base currency (e.g. binance)
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"""
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order_amount = order['amount']
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# Only run for closed orders
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if trade.fee_open == 0 or order['status'] == 'open':
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return order_amount
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# use fee from order-dict if possible
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if 'fee' in order and order['fee'] and (order['fee'].keys() >= {'currency', 'cost'}):
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if trade.pair.startswith(order['fee']['currency']):
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new_amount = order_amount - order['fee']['cost']
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logger.info("Applying fee on amount for %s (from %s to %s) from Order",
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trade, order['amount'], new_amount)
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return new_amount
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# Fallback to Trades
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trades = self.exchange.get_trades_for_order(trade.open_order_id, trade.pair,
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trade.open_date)
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if len(trades) == 0:
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logger.info("Applying fee on amount for %s failed: myTrade-Dict empty found", trade)
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return order_amount
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amount = 0
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fee_abs = 0
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for exectrade in trades:
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amount += exectrade['amount']
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if "fee" in exectrade and (exectrade['fee'].keys() >= {'currency', 'cost'}):
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# only applies if fee is in quote currency!
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if trade.pair.startswith(exectrade['fee']['currency']):
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fee_abs += exectrade['fee']['cost']
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if amount != order_amount:
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logger.warning(f"amount {amount} does not match amount {trade.amount}")
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raise OperationalException("Half bought? Amounts don't match")
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real_amount = amount - fee_abs
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if fee_abs != 0:
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logger.info(f"""Applying fee on amount for {trade} \
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(from {order_amount} to {real_amount}) from Trades""")
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return real_amount
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def handle_trade(self, trade: Trade) -> bool:
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"""
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Sells the current pair if the threshold is reached and updates the trade record.
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:return: True if trade has been sold, False otherwise
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"""
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if not trade.is_open:
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raise ValueError(f'attempt to handle closed trade: {trade}')
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logger.debug('Handling %s ...', trade)
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current_rate = self.exchange.get_ticker(trade.pair)['bid']
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(buy, sell) = (False, False)
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experimental = self.config.get('experimental', {})
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if experimental.get('use_sell_signal') or experimental.get('ignore_roi_if_buy_signal'):
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(buy, sell) = self.strategy.get_signal(self.exchange,
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trade.pair, self.strategy.ticker_interval)
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should_sell = self.strategy.should_sell(trade, current_rate, datetime.utcnow(), buy, sell)
|
|
if should_sell.sell_flag:
|
|
self.execute_sell(trade, current_rate, should_sell.sell_type)
|
|
return True
|
|
logger.info('Found no sell signals for whitelisted currencies. Trying again..')
|
|
return False
|
|
|
|
def check_handle_timedout(self) -> None:
|
|
"""
|
|
Check if any orders are timed out and cancel if neccessary
|
|
:param timeoutvalue: Number of minutes until order is considered timed out
|
|
:return: None
|
|
"""
|
|
buy_timeout = self.config['unfilledtimeout']['buy']
|
|
sell_timeout = self.config['unfilledtimeout']['sell']
|
|
buy_timeoutthreashold = arrow.utcnow().shift(minutes=-buy_timeout).datetime
|
|
sell_timeoutthreashold = arrow.utcnow().shift(minutes=-sell_timeout).datetime
|
|
|
|
for trade in Trade.query.filter(Trade.open_order_id.isnot(None)).all():
|
|
try:
|
|
# FIXME: Somehow the query above returns results
|
|
# where the open_order_id is in fact None.
|
|
# This is probably because the record got
|
|
# updated via /forcesell in a different thread.
|
|
if not trade.open_order_id:
|
|
continue
|
|
order = self.exchange.get_order(trade.open_order_id, trade.pair)
|
|
except requests.exceptions.RequestException:
|
|
logger.info(
|
|
'Cannot query order for %s due to %s',
|
|
trade,
|
|
traceback.format_exc())
|
|
continue
|
|
ordertime = arrow.get(order['datetime']).datetime
|
|
|
|
# Check if trade is still actually open
|
|
if int(order['remaining']) == 0:
|
|
continue
|
|
|
|
# Check if trade is still actually open
|
|
if order['status'] == 'open':
|
|
if order['side'] == 'buy' and ordertime < buy_timeoutthreashold:
|
|
self.handle_timedout_limit_buy(trade, order)
|
|
elif order['side'] == 'sell' and ordertime < sell_timeoutthreashold:
|
|
self.handle_timedout_limit_sell(trade, order)
|
|
|
|
# FIX: 20180110, why is cancel.order unconditionally here, whereas
|
|
# it is conditionally called in the
|
|
# handle_timedout_limit_sell()?
|
|
def handle_timedout_limit_buy(self, trade: Trade, order: Dict) -> bool:
|
|
"""Buy timeout - cancel order
|
|
:return: True if order was fully cancelled
|
|
"""
|
|
pair_s = trade.pair.replace('_', '/')
|
|
self.exchange.cancel_order(trade.open_order_id, trade.pair)
|
|
if order['remaining'] == order['amount']:
|
|
# if trade is not partially completed, just delete the trade
|
|
Trade.session.delete(trade)
|
|
Trade.session.flush()
|
|
logger.info('Buy order timeout for %s.', trade)
|
|
self.rpc.send_msg({
|
|
'type': RPCMessageType.STATUS_NOTIFICATION,
|
|
'status': f'Unfilled buy order for {pair_s} cancelled due to timeout'
|
|
})
|
|
return True
|
|
|
|
# if trade is partially complete, edit the stake details for the trade
|
|
# and close the order
|
|
trade.amount = order['amount'] - order['remaining']
|
|
trade.stake_amount = trade.amount * trade.open_rate
|
|
trade.open_order_id = None
|
|
logger.info('Partial buy order timeout for %s.', trade)
|
|
self.rpc.send_msg({
|
|
'type': RPCMessageType.STATUS_NOTIFICATION,
|
|
'status': f'Remaining buy order for {pair_s} cancelled due to timeout'
|
|
})
|
|
return False
|
|
|
|
# FIX: 20180110, should cancel_order() be cond. or unconditionally called?
|
|
def handle_timedout_limit_sell(self, trade: Trade, order: Dict) -> bool:
|
|
"""
|
|
Sell timeout - cancel order and update trade
|
|
:return: True if order was fully cancelled
|
|
"""
|
|
pair_s = trade.pair.replace('_', '/')
|
|
if order['remaining'] == order['amount']:
|
|
# if trade is not partially completed, just cancel the trade
|
|
self.exchange.cancel_order(trade.open_order_id, trade.pair)
|
|
trade.close_rate = None
|
|
trade.close_profit = None
|
|
trade.close_date = None
|
|
trade.is_open = True
|
|
trade.open_order_id = None
|
|
self.rpc.send_msg({
|
|
'type': RPCMessageType.STATUS_NOTIFICATION,
|
|
'status': f'Unfilled sell order for {pair_s} cancelled due to timeout'
|
|
})
|
|
logger.info('Sell order timeout for %s.', trade)
|
|
return True
|
|
|
|
# TODO: figure out how to handle partially complete sell orders
|
|
return False
|
|
|
|
def execute_sell(self, trade: Trade, limit: float, sell_reason: SellType) -> None:
|
|
"""
|
|
Executes a limit sell for the given trade and limit
|
|
:param trade: Trade instance
|
|
:param limit: limit rate for the sell order
|
|
:param sellreason: Reason the sell was triggered
|
|
:return: None
|
|
"""
|
|
# Execute sell and update trade record
|
|
order_id = self.exchange.sell(str(trade.pair), limit, trade.amount)['id']
|
|
trade.open_order_id = order_id
|
|
trade.close_rate_requested = limit
|
|
trade.sell_reason = sell_reason.value
|
|
|
|
profit_trade = trade.calc_profit(rate=limit)
|
|
current_rate = self.exchange.get_ticker(trade.pair)['bid']
|
|
profit_percent = trade.calc_profit_percent(limit)
|
|
pair_url = self.exchange.get_pair_detail_url(trade.pair)
|
|
gain = "profit" if profit_percent > 0 else "loss"
|
|
|
|
msg = {
|
|
'type': RPCMessageType.SELL_NOTIFICATION,
|
|
'exchange': trade.exchange.capitalize(),
|
|
'pair': trade.pair,
|
|
'gain': gain,
|
|
'market_url': pair_url,
|
|
'limit': limit,
|
|
'amount': trade.amount,
|
|
'open_rate': trade.open_rate,
|
|
'current_rate': current_rate,
|
|
'profit_amount': profit_trade,
|
|
'profit_percent': profit_percent,
|
|
}
|
|
|
|
# For regular case, when the configuration exists
|
|
if 'stake_currency' in self.config and 'fiat_display_currency' in self.config:
|
|
stake_currency = self.config['stake_currency']
|
|
fiat_currency = self.config['fiat_display_currency']
|
|
msg.update({
|
|
'stake_currency': stake_currency,
|
|
'fiat_currency': fiat_currency,
|
|
})
|
|
|
|
# Send the message
|
|
self.rpc.send_msg(msg)
|
|
Trade.session.flush()
|