stable/freqtrade/exchange/okx.py
2022-05-14 19:35:06 +02:00

149 lines
5.2 KiB
Python

import logging
from datetime import datetime, timedelta, timezone
from typing import Dict, List, Optional, Tuple
import ccxt
from freqtrade.constants import BuySell
from freqtrade.enums import MarginMode, TradingMode
from freqtrade.enums.candletype import CandleType
from freqtrade.exceptions import DDosProtection, OperationalException, TemporaryError
from freqtrade.exchange import Exchange
from freqtrade.exchange.common import retrier
from freqtrade.exchange.exchange import date_minus_candles
logger = logging.getLogger(__name__)
class Okx(Exchange):
"""Okx exchange class.
Contains adjustments needed for Freqtrade to work with this exchange.
"""
_ft_has: Dict = {
"ohlcv_candle_limit": 100, # Warning, special case with data prior to X months
"mark_ohlcv_timeframe": "4h",
"funding_fee_timeframe": "8h",
}
_ft_has_futures: Dict = {
"tickers_have_quoteVolume": False,
}
_supported_trading_mode_margin_pairs: List[Tuple[TradingMode, MarginMode]] = [
# TradingMode.SPOT always supported and not required in this list
# (TradingMode.MARGIN, MarginMode.CROSS),
# (TradingMode.FUTURES, MarginMode.CROSS),
(TradingMode.FUTURES, MarginMode.ISOLATED),
]
net_only = True
def ohlcv_candle_limit(
self, timeframe: str, candle_type: CandleType, since_ms: Optional[int] = None) -> int:
"""
Exchange ohlcv candle limit
OKX has the following behaviour:
* 300 candles for uptodate data
* 100 candles for historic data
* 100 candles for additional candles (not futures or spot).
:param timeframe: Timeframe to check
:param candle_type: Candle-type
:param since_ms: Candle-type
:return: Candle limit as integer
"""
if (
candle_type in (CandleType.FUTURES, CandleType.SPOT) and
(not since_ms or since_ms > (date_minus_candles(timeframe, 300).timestamp() * 1000))
):
return 300
return super().ohlcv_candle_limit(timeframe, candle_type, since_ms)
@retrier
def additional_exchange_init(self) -> None:
"""
Additional exchange initialization logic.
.api will be available at this point.
Must be overridden in child methods if required.
"""
try:
if self.trading_mode == TradingMode.FUTURES and not self._config['dry_run']:
accounts = self._api.fetch_accounts()
if len(accounts) > 0:
self.net_only = accounts[0].get('info', {}).get('posMode') == 'net_mode'
except ccxt.DDoSProtection as e:
raise DDosProtection(e) from e
except (ccxt.NetworkError, ccxt.ExchangeError) as e:
raise TemporaryError(
f'Could not set leverage due to {e.__class__.__name__}. Message: {e}') from e
except ccxt.BaseError as e:
raise OperationalException(e) from e
def _get_posSide(self, side: BuySell, reduceOnly: bool):
if self.net_only:
return 'net'
if not reduceOnly:
# Enter
return 'long' if side == 'buy' else 'short'
else:
# Exit
return 'long' if side == 'sell' else 'short'
def _get_params(
self,
side: BuySell,
ordertype: str,
leverage: float,
reduceOnly: bool,
time_in_force: str = 'gtc',
) -> Dict:
params = super()._get_params(
side=side,
ordertype=ordertype,
leverage=leverage,
reduceOnly=reduceOnly,
time_in_force=time_in_force,
)
if self.trading_mode == TradingMode.FUTURES and self.margin_mode:
params['tdMode'] = self.margin_mode.value
params['posSide'] = self._get_posSide(side, reduceOnly)
return params
@retrier
def _lev_prep(self, pair: str, leverage: float, side: BuySell):
if self.trading_mode != TradingMode.SPOT and self.margin_mode is not None:
try:
# TODO-lev: Test me properly (check mgnMode passed)
self._api.set_leverage(
leverage=leverage,
symbol=pair,
params={
"mgnMode": self.margin_mode.value,
"posSide": self._get_posSide(side, False),
})
except ccxt.DDoSProtection as e:
raise DDosProtection(e) from e
except (ccxt.NetworkError, ccxt.ExchangeError) as e:
raise TemporaryError(
f'Could not set leverage due to {e.__class__.__name__}. Message: {e}') from e
except ccxt.BaseError as e:
raise OperationalException(e) from e
def get_max_pair_stake_amount(
self,
pair: str,
price: float,
leverage: float = 1.0
) -> float:
if self.trading_mode == TradingMode.SPOT:
return float('inf') # Not actually inf, but this probably won't matter for SPOT
if pair not in self._leverage_tiers:
return float('inf')
pair_tiers = self._leverage_tiers[pair]
return pair_tiers[-1]['max'] / leverage