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import asyncio
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import logging
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from functools import partial
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from eth_account import Account
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from hyperliquid.exchange import Exchange
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from hyperliquid.info import Info
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logger = logging.getLogger(__name__)
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HL_MAINNET = "https://api.hyperliquid.xyz"
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# Coin name mapping: our asset -> Hyperliquid coin
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COIN_MAP = {
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"BTC": "BTC",
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"ETH": "ETH",
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}
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class HyperliquidTrader:
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def __init__(self, private_key: str):
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self.account = Account.from_key(private_key)
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self.exchange = Exchange(self.account, HL_MAINNET)
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self.info = Info(HL_MAINNET)
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self._loop = asyncio.get_event_loop()
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# ── helpers ──────────────────────────────────────────────────────────────
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async def _run_sync(self, fn, *args, **kwargs):
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"""Run a blocking SDK call in the default thread pool."""
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return await self._loop.run_in_executor(None, partial(fn, *args, **kwargs))
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def _wallet(self) -> str:
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return self.account.address
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# ── public interface ─────────────────────────────────────────────────────
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async def get_balance(self) -> float:
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"""Return USDC balance (withdrawable)."""
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try:
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state = await self._run_sync(
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self.info.user_state, self._wallet()
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)
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return float(state.get("withdrawable", 0))
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except Exception as exc:
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logger.error("get_balance error: %s", exc)
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return 0.0
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async def open_position(self, asset: str, side: str, size_usd: float) -> dict:
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"""Place a market order.
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Args:
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asset: "BTC" or "ETH"
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side: "long" (buy) or "short" (sell)
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size_usd: notional size in USD
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Returns:
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{"order_id": str, "fill_price": float}
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"""
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coin = COIN_MAP.get(asset.upper(), asset.upper())
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is_buy = side.lower() == "long"
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try:
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# Get current price to compute size in coins
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meta = await self._run_sync(self.info.meta)
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universe = {u["name"]: u for u in meta.get("universe", [])}
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coin_meta = universe.get(coin, {})
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sz_decimals = int(coin_meta.get("szDecimals", 3))
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# Use mid-price approximation from user state
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all_mids = await self._run_sync(self.info.all_mids)
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mid_price = float(all_mids.get(coin, 0))
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if mid_price <= 0:
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raise ValueError(f"Could not get mid price for {coin}")
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size_coins = round(size_usd / mid_price, sz_decimals)
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# Slippage: 1% for longs (limit above mid), 1% for shorts (limit below mid)
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slippage = 0.01
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if is_buy:
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limit_px = round(mid_price * (1 + slippage), 1)
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else:
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limit_px = round(mid_price * (1 - slippage), 1)
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order_result = await self._run_sync(
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self.exchange.order,
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coin,
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is_buy,
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size_coins,
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limit_px,
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{"limit": {"tif": "Ioc"}}, # IOC ~ market
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)
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status = order_result.get("response", {}).get("data", {})
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filled = status.get("statuses", [{}])[0]
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fill_price = float(filled.get("filled", {}).get("avgPx", mid_price) or mid_price)
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order_id = str(filled.get("resting", {}).get("oid", ""))
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logger.info(
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"Opened %s %s position: size=%.4f coins @ %.2f",
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side, coin, size_coins, fill_price,
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)
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return {"order_id": order_id, "fill_price": fill_price}
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except Exception as exc:
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logger.error("open_position error: %s", exc)
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raise
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async def close_position(self, asset: str) -> dict:
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"""Close all open positions for the given asset.
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Returns:
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{"fill_price": float}
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"""
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coin = COIN_MAP.get(asset.upper(), asset.upper())
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try:
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positions = await self.get_open_positions()
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target = next(
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(p for p in positions if p.get("coin") == coin), None
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)
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if target is None:
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logger.warning("No open position found for %s", coin)
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return {"fill_price": 0.0}
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szi = float(target.get("szi", 0))
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is_buy = szi < 0 # closing a short means buying
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all_mids = await self._run_sync(self.info.all_mids)
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mid_price = float(all_mids.get(coin, 0))
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slippage = 0.01
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if is_buy:
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limit_px = round(mid_price * (1 + slippage), 1)
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else:
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limit_px = round(mid_price * (1 - slippage), 1)
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close_result = await self._run_sync(
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self.exchange.order,
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coin,
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is_buy,
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abs(szi),
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limit_px,
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{"limit": {"tif": "Ioc"}},
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reduce_only=True,
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)
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status = close_result.get("response", {}).get("data", {})
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filled = status.get("statuses", [{}])[0]
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fill_price = float(filled.get("filled", {}).get("avgPx", mid_price) or mid_price)
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logger.info("Closed %s position @ %.2f", coin, fill_price)
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return {"fill_price": fill_price}
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except Exception as exc:
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logger.error("close_position error: %s", exc)
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raise
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async def get_open_positions(self) -> list:
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"""Return list of open positions from Hyperliquid."""
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try:
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state = await self._run_sync(self.info.user_state, self._wallet())
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positions = []
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for asset_pos in state.get("assetPositions", []):
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pos = asset_pos.get("position", {})
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szi = float(pos.get("szi", 0))
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if szi != 0:
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positions.append({
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"coin": pos.get("coin"),
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"szi": szi,
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"entry_px": float(pos.get("entryPx", 0) or 0),
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"unrealized_pnl": float(pos.get("unrealizedPnl", 0) or 0),
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})
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return positions
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except Exception as exc:
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logger.error("get_open_positions error: %s", exc)
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return []
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