Merge branch 'develop' into feat/short

freqtrade/exchange/okx.py

@@ -0,0 +1,48 @@
+import logging
+from typing import Dict, List, Tuple
+
+from freqtrade.enums import MarginMode, TradingMode
+from freqtrade.exceptions import OperationalException
+from freqtrade.exchange import Exchange
+
+
+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": 300,
+        "mark_ohlcv_timeframe": "4h",
+        "funding_fee_timeframe": "8h",
+    }
+
+    _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",
+                })