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add _ft_has to exchangeclass

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This commit is contained in:
Matthias 2019-02-24 19:35:29 +01:00
parent 06f486a8eb
commit 455b168366
1 changed files with 12 additions and 14 deletions
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26
freqtrade/exchange/exchange.py
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@ -24,7 +24,7 @@ API_RETRY_COUNT = 4
# Urls to exchange markets, insert quote and base with .format() # Urls to exchange markets, insert quote and base with .format()
_EXCHANGE_URLS = { _EXCHANGE_URLS = {
ccxt.bittrex.__name__: '/Market/Index?MarketName={quote}-{base}', ccxt.bittrex.__name__: '/Market/Index?MarketName={quote}-{base}',
ccxt.binance.__name__: '/tradeDetail.html?symbol={base}_{quote}' ccxt.binance.__name__: '/tradeDetail.html?symbol={base}_{quote}',
} }
@ -69,11 +69,17 @@ class Exchange(object):
_conf: Dict = {} _conf: Dict = {}
_params: Dict = {} _params: Dict = {}
# Dict to specify which options each exchange implements
# TODO: this should be merged with attributes from subclasses
# To avoid having to copy/paste this to all subclasses.
_ft_has = {
"stoploss_on_exchange": False,
}
def __init__(self, config: dict) -> None: def __init__(self, config: dict) -> None:
""" """
Initializes this module with the given config, Initializes this module with the given config,
it does basic validation whether the specified it does basic validation whether the specified exchange and pairs are valid.
exchange and pairs are valid.
:return: None :return: None
""" """
self._conf.update(config) self._conf.update(config)
@ -236,8 +242,8 @@ class Exchange(object):
raise OperationalException( raise OperationalException(
f'Exchange {self.name} does not support market orders.') f'Exchange {self.name} does not support market orders.')
if order_types.get('stoploss_on_exchange'): if (order_types.get("stoploss_on_exchange")
if self.name != 'Binance': and not self._ft_has.get("stoploss_on_exchange", False)):
raise OperationalException( raise OperationalException(
'On exchange stoploss is not supported for %s.' % self.name 'On exchange stoploss is not supported for %s.' % self.name
) )
@ -368,6 +374,7 @@ class Exchange(object):
""" """
creates a stoploss limit order. creates a stoploss limit order.
NOTICE: it is not supported by all exchanges. only binance is tested for now. NOTICE: it is not supported by all exchanges. only binance is tested for now.
TODO: implementation maybe needs to be move to the binance subclass
""" """
ordertype = "stop_loss_limit" ordertype = "stop_loss_limit"
@ -617,15 +624,6 @@ class Exchange(object):
20180619: binance support limits but only on specific range 20180619: binance support limits but only on specific range
""" """
try: try:
if self._api.name == 'Binance':
limit_range = [5, 10, 20, 50, 100, 500, 1000]
# get next-higher step in the limit_range list
limit = min(list(filter(lambda x: limit <= x, limit_range)))
# above script works like loop below (but with slightly better performance):
# for limitx in limit_range:
# if limit <= limitx:
# limit = limitx
# break
return self._api.fetch_l2_order_book(pair, limit) return self._api.fetch_l2_order_book(pair, limit)
except ccxt.NotSupported as e: except ccxt.NotSupported as e: