95 lines
3.5 KiB
Python
95 lines
3.5 KiB
Python
""" Huobi exchange subclass """
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import logging
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from typing import Dict
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import ccxt
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from freqtrade.exceptions import (DDosProtection, InsufficientFundsError, InvalidOrderException,
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OperationalException, TemporaryError)
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from freqtrade.exchange import Exchange
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from freqtrade.exchange.common import retrier
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logger = logging.getLogger(__name__)
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class Huobi(Exchange):
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"""
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Huobi exchange class. Contains adjustments needed for Freqtrade to work
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with this exchange.
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"""
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_ft_has: Dict = {
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"stoploss_on_exchange": True,
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"ohlcv_candle_limit": 2000,
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}
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def stoploss_adjust(self, stop_loss: float, order: Dict) -> bool:
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"""
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Verify stop_loss against stoploss-order value (limit or price)
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Returns True if adjustment is necessary.
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"""
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return order['type'] == 'stop' and stop_loss > float(order['stopPrice'])
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@retrier(retries=0)
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def stoploss(self, pair: str, amount: float, stop_price: float, order_types: Dict) -> Dict:
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"""
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creates a stoploss limit order.
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this stoploss-limit is huobi-specific.
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TODO: Compare this with other stoploss implementations -
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"""
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# Limit price threshold: As limit price should always be below stop-price
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limit_price_pct = order_types.get('stoploss_on_exchange_limit_ratio', 0.99)
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rate = stop_price * limit_price_pct
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ordertype = "stop-limit"
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stop_price = self.price_to_precision(pair, stop_price)
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# Ensure rate is less than stop price
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if stop_price <= rate:
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raise OperationalException(
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'In stoploss limit order, stop price should be more than limit price')
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if self._config['dry_run']:
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dry_order = self.create_dry_run_order(
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pair, ordertype, "sell", amount, stop_price)
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return dry_order
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try:
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params = self._params.copy()
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params.update({
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"stopPrice": stop_price,
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"operator": "lte",
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})
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amount = self.amount_to_precision(pair, amount)
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rate = self.price_to_precision(pair, rate)
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order = self._api.create_order(symbol=pair, type=ordertype, side='sell',
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amount=amount, price=rate, params=params)
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logger.info('stoploss limit order added for %s. '
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'stop price: %s. limit: %s', pair, stop_price, rate)
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self._log_exchange_response('create_stoploss_order', order)
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return order
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except ccxt.InsufficientFunds as e:
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raise InsufficientFundsError(
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f'Insufficient funds to create {ordertype} sell order on market {pair}. '
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f'Tried to sell amount {amount} at rate {rate}. '
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f'Message: {e}') from e
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except ccxt.InvalidOrder as e:
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# Errors:
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# `Order would trigger immediately.`
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raise InvalidOrderException(
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f'Could not create {ordertype} sell order on market {pair}. '
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f'Tried to sell amount {amount} at rate {rate}. '
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f'Message: {e}') from e
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except ccxt.DDoSProtection as e:
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raise DDosProtection(e) from e
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except (ccxt.NetworkError, ccxt.ExchangeError) as e:
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raise TemporaryError(
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f'Could not place sell order due to {e.__class__.__name__}. Message: {e}') from e
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except ccxt.BaseError as e:
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raise OperationalException(e) from e
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