""" This module contains the configuration class """ import json import logging import os from argparse import Namespace from typing import Any, Dict, Optional import ccxt from jsonschema import Draft4Validator, validate from jsonschema.exceptions import ValidationError, best_match from freqtrade import OperationalException, constants logger = logging.getLogger(__name__) def set_loggers(log_level: int = 0) -> None: """ Set the logger level for Third party libs :return: None """ logging.getLogger('requests').setLevel(logging.INFO if log_level <= 1 else logging.DEBUG) logging.getLogger("urllib3").setLevel(logging.INFO if log_level <= 1 else logging.DEBUG) logging.getLogger('ccxt.base.exchange').setLevel( logging.INFO if log_level <= 2 else logging.DEBUG) logging.getLogger('telegram').setLevel(logging.INFO) class Configuration(object): """ Class to read and init the bot configuration Reuse this class for the bot, backtesting, hyperopt and every script that required configuration """ def __init__(self, args: Namespace) -> None: self.args = args self.config: Optional[Dict[str, Any]] = None def load_config(self) -> Dict[str, Any]: """ Extract information for sys.argv and load the bot configuration :return: Configuration dictionary """ logger.info('Using config: %s ...', self.args.config) config = self._load_config_file(self.args.config) # Set strategy if not specified in config and or if it's non default if self.args.strategy != constants.DEFAULT_STRATEGY or not config.get('strategy'): config.update({'strategy': self.args.strategy}) if self.args.strategy_path: config.update({'strategy_path': self.args.strategy_path}) # Add the hyperopt file to use config.update({'hyperopt': self.args.hyperopt}) # Load Common configuration config = self._load_common_config(config) # Load Backtesting config = self._load_backtesting_config(config) # Load Edge config = self._load_edge_config(config) # Load Hyperopt config = self._load_hyperopt_config(config) return config def _load_config_file(self, path: str) -> Dict[str, Any]: """ Loads a config file from the given path :param path: path as str :return: configuration as dictionary """ try: with open(path) as file: conf = json.load(file) except FileNotFoundError: raise OperationalException( f'Config file "{path}" not found!' ' Please create a config file or check whether it exists.') if 'internals' not in conf: conf['internals'] = {} logger.info('Validating configuration ...') return self._validate_config(conf) def _load_common_config(self, config: Dict[str, Any]) -> Dict[str, Any]: """ Extract information for sys.argv and load common configuration :return: configuration as dictionary """ # Log level if 'loglevel' in self.args and self.args.loglevel: config.update({'verbosity': self.args.loglevel}) else: config.update({'verbosity': 0}) logging.basicConfig( level=logging.INFO if config['verbosity'] < 1 else logging.DEBUG, format='%(asctime)s - %(name)s - %(levelname)s - %(message)s', ) set_loggers(config['verbosity']) logger.info('Verbosity set to %s', config['verbosity']) # Add dynamic_whitelist if found if 'dynamic_whitelist' in self.args and self.args.dynamic_whitelist: # Update to volumePairList (the previous default) config['whitelist'] = {'method': 'VolumePairList', 'config': {'number_assets': self.args.dynamic_whitelist} } logger.warning( 'Parameter --dynamic-whitelist has been deprecated, ' 'and will be completely replaced by the whitelist dict in the future. ' 'For now: using dynamically generated whitelist based on VolumePairList. ' '(not applicable with Backtesting and Hyperopt)' ) if self.args.db_url and self.args.db_url != constants.DEFAULT_DB_PROD_URL: config.update({'db_url': self.args.db_url}) logger.info('Parameter --db-url detected ...') else: # Set default here config.update({'db_url': constants.DEFAULT_DB_PROD_URL}) if config.get('dry_run', False): logger.info('Dry run is enabled') if config.get('db_url') in [None, constants.DEFAULT_DB_PROD_URL]: # Default to in-memory db for dry_run if not specified config['db_url'] = constants.DEFAULT_DB_DRYRUN_URL else: if not config.get('db_url', None): config['db_url'] = constants.DEFAULT_DB_PROD_URL logger.info('Dry run is disabled') if config.get('forcebuy_enable', False): logger.warning('`forcebuy` RPC message enabled.') # Setting max_open_trades to infinite if -1 if config.get('max_open_trades') == -1: config['max_open_trades'] = float('inf') logger.info(f'Using DB: "{config["db_url"]}"') # Check if the exchange set by the user is supported self.check_exchange(config) return config def _create_default_datadir(self, config: Dict[str, Any]) -> str: exchange_name = config.get('exchange', {}).get('name').lower() default_path = os.path.join('user_data', 'data', exchange_name) if not os.path.isdir(default_path): os.makedirs(default_path) logger.info(f'Created data directory: {default_path}') return default_path def _load_backtesting_config(self, config: Dict[str, Any]) -> Dict[str, Any]: """ Extract information for sys.argv and load Backtesting configuration :return: configuration as dictionary """ # If -i/--ticker-interval is used we override the configuration parameter # (that will override the strategy configuration) if 'ticker_interval' in self.args and self.args.ticker_interval: config.update({'ticker_interval': self.args.ticker_interval}) logger.info('Parameter -i/--ticker-interval detected ...') logger.info('Using ticker_interval: %s ...', config.get('ticker_interval')) # If -l/--live is used we add it to the configuration if 'live' in self.args and self.args.live: config.update({'live': True}) logger.info('Parameter -l/--live detected ...') # If --enable-position-stacking is used we add it to the configuration if 'position_stacking' in self.args and self.args.position_stacking: config.update({'position_stacking': True}) logger.info('Parameter --enable-position-stacking detected ...') # If --disable-max-market-positions is used we add it to the configuration if 'use_max_market_positions' in self.args and not self.args.use_max_market_positions: config.update({'use_max_market_positions': False}) logger.info('Parameter --disable-max-market-positions detected ...') logger.info('max_open_trades set to unlimited ...') else: logger.info('Using max_open_trades: %s ...', config.get('max_open_trades')) # If --timerange is used we add it to the configuration if 'timerange' in self.args and self.args.timerange: config.update({'timerange': self.args.timerange}) logger.info('Parameter --timerange detected: %s ...', self.args.timerange) # If --datadir is used we add it to the configuration if 'datadir' in self.args and self.args.datadir: config.update({'datadir': self.args.datadir}) else: config.update({'datadir': self._create_default_datadir(config)}) logger.info('Using data folder: %s ...', config.get('datadir')) # If -r/--refresh-pairs-cached is used we add it to the configuration if 'refresh_pairs' in self.args and self.args.refresh_pairs: config.update({'refresh_pairs': True}) logger.info('Parameter -r/--refresh-pairs-cached detected ...') if 'strategy_list' in self.args and self.args.strategy_list: config.update({'strategy_list': self.args.strategy_list}) logger.info('Using strategy list of %s Strategies', len(self.args.strategy_list)) if 'ticker_interval' in self.args and self.args.ticker_interval: config.update({'ticker_interval': self.args.ticker_interval}) logger.info('Overriding ticker interval with Command line argument') # If --export is used we add it to the configuration if 'export' in self.args and self.args.export: config.update({'export': self.args.export}) logger.info('Parameter --export detected: %s ...', self.args.export) # If --export-filename is used we add it to the configuration if 'export' in config and 'exportfilename' in self.args and self.args.exportfilename: config.update({'exportfilename': self.args.exportfilename}) logger.info('Storing backtest results to %s ...', self.args.exportfilename) return config def _load_edge_config(self, config: Dict[str, Any]) -> Dict[str, Any]: """ Extract information for sys.argv and load Edge configuration :return: configuration as dictionary """ # If --timerange is used we add it to the configuration if 'timerange' in self.args and self.args.timerange: config.update({'timerange': self.args.timerange}) logger.info('Parameter --timerange detected: %s ...', self.args.timerange) # If --timerange is used we add it to the configuration if 'stoploss_range' in self.args and self.args.stoploss_range: txt_range = eval(self.args.stoploss_range) config['edge'].update({'stoploss_range_min': txt_range[0]}) config['edge'].update({'stoploss_range_max': txt_range[1]}) config['edge'].update({'stoploss_range_step': txt_range[2]}) logger.info('Parameter --stoplosses detected: %s ...', self.args.stoploss_range) # If -r/--refresh-pairs-cached is used we add it to the configuration if 'refresh_pairs' in self.args and self.args.refresh_pairs: config.update({'refresh_pairs': True}) logger.info('Parameter -r/--refresh-pairs-cached detected ...') return config def _load_hyperopt_config(self, config: Dict[str, Any]) -> Dict[str, Any]: """ Extract information for sys.argv and load Hyperopt configuration :return: configuration as dictionary """ # If --epochs is used we add it to the configuration if 'epochs' in self.args and self.args.epochs: config.update({'epochs': self.args.epochs}) logger.info('Parameter --epochs detected ...') logger.info('Will run Hyperopt with for %s epochs ...', config.get('epochs')) # If --spaces is used we add it to the configuration if 'spaces' in self.args and self.args.spaces: config.update({'spaces': self.args.spaces}) logger.info('Parameter -s/--spaces detected: %s', config.get('spaces')) return config def _validate_config(self, conf: Dict[str, Any]) -> Dict[str, Any]: """ Validate the configuration follow the Config Schema :param conf: Config in JSON format :return: Returns the config if valid, otherwise throw an exception """ try: validate(conf, constants.CONF_SCHEMA) return conf except ValidationError as exception: logger.critical( 'Invalid configuration. See config.json.example. Reason: %s', exception ) raise ValidationError( best_match(Draft4Validator(constants.CONF_SCHEMA).iter_errors(conf)).message ) def get_config(self) -> Dict[str, Any]: """ Return the config. Use this method to get the bot config :return: Dict: Bot config """ if self.config is None: self.config = self.load_config() return self.config def check_exchange(self, config: Dict[str, Any]) -> bool: """ Check if the exchange name in the config file is supported by Freqtrade :return: True or raised an exception if the exchange if not supported """ exchange = config.get('exchange', {}).get('name').lower() if exchange not in ccxt.exchanges: exception_msg = f'Exchange "{exchange}" not supported.\n' \ f'The following exchanges are supported: {", ".join(ccxt.exchanges)}' logger.critical(exception_msg) raise OperationalException( exception_msg ) # Depreciation warning if 'ccxt_rate_limit' in config.get('exchange', {}): logger.warning("`ccxt_rate_limit` has been deprecated in favor of " "`ccxt_config` and `ccxt_async_config` and will be removed " "in a future version.") logger.debug('Exchange "%s" supported', exchange) return True