stable/freqtrade/exchange/okx.py

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import logging
from typing import Dict, List, Tuple
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from freqtrade.enums import MarginMode, TradingMode
from freqtrade.exceptions import OperationalException
from freqtrade.exchange import Exchange
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logger = logging.getLogger(__name__)
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class Okx(Exchange):
"""Okx exchange class.
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Contains adjustments needed for Freqtrade to work with this exchange.
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"""
_ft_has: Dict = {
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"ohlcv_candle_limit": 300,
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"mark_ohlcv_timeframe": "4h",
"funding_fee_timeframe": "8h",
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}
_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),
]
def _lev_prep(
self,
pair: str,
leverage: float,
side: str # buy or sell
):
if self.trading_mode != TradingMode.SPOT:
if self.margin_mode is None:
raise OperationalException(
f"{self.name}.margin_mode must be set for {self.trading_mode.value}"
)
self._api.set_leverage(
leverage,
pair,
params={
"mgnMode": self.margin_mode.value,
"posSide": "long" if side == "buy" else "short",
})
def get_leverage_tiers(self, pair: str):
return self._api.fetch_leverage_tiers(pair)
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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:
tiers = self.get_leverage_tiers_for_pair(pair)
if not tiers: # Not a leveraged market
return float('inf')
else:
self._leverage_tiers[pair] = tiers
pair_tiers = self._leverage_tiers[pair]
return pair_tiers[-1]['max'] / leverage