import asyncio import logging import time from functools import wraps from freqtrade.exceptions import DDosProtection, RetryableOrderError, TemporaryError logger = logging.getLogger(__name__) # Maximum default retry count. # Functions are always called RETRY_COUNT + 1 times (for the original call) API_RETRY_COUNT = 4 API_FETCH_ORDER_RETRY_COUNT = 5 BAD_EXCHANGES = { "bitmex": "Various reasons.", "phemex": "Does not provide history. ", "poloniex": "Does not provide fetch_order endpoint to fetch both open and closed orders.", } MAP_EXCHANGE_CHILDCLASS = { 'binanceus': 'binance', 'binanceje': 'binance', 'binanceusdm': 'binance', } EXCHANGE_HAS_REQUIRED = [ # Required / private 'fetchOrder', 'cancelOrder', 'createOrder', # 'createLimitOrder', 'createMarketOrder', 'fetchBalance', # Public endpoints 'loadMarkets', 'fetchOHLCV', ] EXCHANGE_HAS_OPTIONAL = [ # Private 'fetchMyTrades', # Trades for order - fee detection # Public 'fetchOrderBook', 'fetchL2OrderBook', 'fetchTicker', # OR for pricing 'fetchTickers', # For volumepairlist? 'fetchTrades', # Downloading trades data ] def remove_credentials(config) -> None: """ Removes exchange keys from the configuration and specifies dry-run Used for backtesting / hyperopt / edge and utils. Modifies the input dict! """ if config.get('dry_run', False): config['exchange']['key'] = '' config['exchange']['secret'] = '' config['exchange']['password'] = '' config['exchange']['uid'] = '' def calculate_backoff(retrycount, max_retries): """ Calculate backoff """ return (max_retries - retrycount) ** 2 + 1 def retrier_async(f): async def wrapper(*args, **kwargs): count = kwargs.pop('count', API_RETRY_COUNT) try: return await f(*args, **kwargs) except TemporaryError as ex: logger.warning('%s() returned exception: "%s"', f.__name__, ex) if count > 0: logger.warning('retrying %s() still for %s times', f.__name__, count) count -= 1 kwargs.update({'count': count}) if isinstance(ex, DDosProtection): if "kucoin" in str(ex) and "429000" in str(ex): # Temporary fix for 429000 error on kucoin # see https://github.com/freqtrade/freqtrade/issues/5700 for details. logger.warning( f"Kucoin 429 error, avoid triggering DDosProtection backoff delay. " f"{count} tries left before giving up") else: backoff_delay = calculate_backoff(count + 1, API_RETRY_COUNT) logger.info(f"Applying DDosProtection backoff delay: {backoff_delay}") await asyncio.sleep(backoff_delay) return await wrapper(*args, **kwargs) else: logger.warning('Giving up retrying: %s()', f.__name__) raise ex return wrapper def retrier(_func=None, retries=API_RETRY_COUNT): def decorator(f): @wraps(f) def wrapper(*args, **kwargs): count = kwargs.pop('count', retries) try: return f(*args, **kwargs) except (TemporaryError, RetryableOrderError) as ex: logger.warning('%s() returned exception: "%s"', f.__name__, ex) if count > 0: logger.warning('retrying %s() still for %s times', f.__name__, count) count -= 1 kwargs.update({'count': count}) if isinstance(ex, (DDosProtection, RetryableOrderError)): # increasing backoff backoff_delay = calculate_backoff(count + 1, retries) logger.info(f"Applying DDosProtection backoff delay: {backoff_delay}") time.sleep(backoff_delay) return wrapper(*args, **kwargs) else: logger.warning('Giving up retrying: %s()', f.__name__) raise ex return wrapper # Support both @retrier and @retrier(retries=2) syntax if _func is None: return decorator else: return decorator(_func)