stable/freqtrade/exchange/binance.py

138 lines
5.3 KiB
Python

""" Binance exchange subclass """
import logging
from typing import Dict, Optional
import ccxt
from freqtrade.exceptions import (DDosProtection, InsufficientFundsError, InvalidOrderException,
OperationalException, TemporaryError)
from freqtrade.exchange import Exchange
from freqtrade.exchange.common import retrier
logger = logging.getLogger(__name__)
class Binance(Exchange):
_ft_has: Dict = {
"stoploss_on_exchange": True,
"order_time_in_force": ['gtc', 'fok', 'ioc'],
"ohlcv_candle_limit": 1000,
"trades_pagination": "id",
"trades_pagination_arg": "fromId",
"l2_limit_range": [5, 10, 20, 50, 100, 500, 1000],
}
def stoploss_adjust(self, stop_loss: float, order: Dict, side: str) -> bool:
"""
Verify stop_loss against stoploss-order value (limit or price)
Returns True if adjustment is necessary.
:param side: "buy" or "sell"
"""
# TODO-lev: Short support
return order['type'] == 'stop_loss_limit' and stop_loss > float(order['info']['stopPrice'])
@retrier(retries=0)
def stoploss(self, pair: str, amount: float,
stop_price: float, order_types: Dict, side: str) -> Dict:
"""
creates a stoploss limit order.
this stoploss-limit is binance-specific.
It may work with a limited number of other exchanges, but this has not been tested yet.
:param side: "buy" or "sell"
"""
# TODO-lev: Short support
# Limit price threshold: As limit price should always be below stop-price
limit_price_pct = order_types.get('stoploss_on_exchange_limit_ratio', 0.99)
rate = stop_price * limit_price_pct
ordertype = "stop_loss_limit"
stop_price = self.price_to_precision(pair, stop_price)
# Ensure rate is less than stop price
if stop_price <= rate:
raise OperationalException(
'In stoploss limit order, stop price should be more than limit price')
if self._config['dry_run']:
dry_order = self.create_dry_run_order(
pair, ordertype, "sell", amount, stop_price)
return dry_order
try:
params = self._params.copy()
params.update({'stopPrice': stop_price})
amount = self.amount_to_precision(pair, amount)
rate = self.price_to_precision(pair, rate)
order = self._api.create_order(symbol=pair, type=ordertype, side='sell',
amount=amount, price=rate, params=params)
logger.info('stoploss limit order added for %s. '
'stop price: %s. limit: %s', pair, stop_price, rate)
self._log_exchange_response('create_stoploss_order', order)
return order
except ccxt.InsufficientFunds as e:
raise InsufficientFundsError(
f'Insufficient funds to create {ordertype} sell order on market {pair}. '
f'Tried to sell amount {amount} at rate {rate}. '
f'Message: {e}') from e
except ccxt.InvalidOrder as e:
# Errors:
# `binance Order would trigger immediately.`
raise InvalidOrderException(
f'Could not create {ordertype} sell order on market {pair}. '
f'Tried to sell amount {amount} at rate {rate}. '
f'Message: {e}') from e
except ccxt.DDoSProtection as e:
raise DDosProtection(e) from e
except (ccxt.NetworkError, ccxt.ExchangeError) as e:
raise TemporaryError(
f'Could not place sell order due to {e.__class__.__name__}. Message: {e}') from e
except ccxt.BaseError as e:
raise OperationalException(e) from e
def _apply_leverage_to_stake_amount(self, stake_amount: float, leverage: float):
return stake_amount / leverage
def fill_leverage_brackets(self):
"""
Assigns property _leverage_brackets to a dictionary of information about the leverage
allowed on each pair
"""
leverage_brackets = self._api.load_leverage_brackets()
for pair, brackets in leverage_brackets.items:
self.leverage_brackets[pair] = [
[
min_amount,
float(margin_req)
] for [
min_amount,
margin_req
] in brackets
]
def get_max_leverage(self, pair: Optional[str], nominal_value: Optional[float]) -> float:
"""
Returns the maximum leverage that a pair can be traded at
:param pair: The base/quote currency pair being traded
:nominal_value: The total value of the trade in quote currency (collateral + debt)
"""
pair_brackets = self._leverage_brackets[pair]
max_lev = 1.0
for [min_amount, margin_req] in pair_brackets:
print(nominal_value, min_amount)
if nominal_value >= min_amount:
max_lev = 1/margin_req
return max_lev
def set_leverage(self, pair, leverage):
"""
Binance Futures must set the leverage before making a futures trade, in order to not
have the same leverage on every trade
"""
self._api.set_leverage(symbol=pair, leverage=leverage)