TIANHE
574 lines
22 KiB
Python
574 lines
22 KiB
Python
"""
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Bitget (direct REST) client for USDT-margined perpetual orders.
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Signing (Bitget):
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- ACCESS-SIGN = base64(hmac_sha256(secret, timestamp + method + request_path + body))
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"""
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from __future__ import annotations
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import base64
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import hashlib
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import hmac
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import time
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from decimal import Decimal, ROUND_DOWN
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from typing import Any, Dict, Optional, Tuple
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from urllib.parse import urlencode
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from app.services.live_trading.base import BaseRestClient, LiveOrderResult, LiveTradingError
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from app.services.live_trading.symbols import to_bitget_um_symbol
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class BitgetMixClient(BaseRestClient):
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def __init__(
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self,
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*,
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api_key: str,
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secret_key: str,
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passphrase: str,
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base_url: str = "https://api.bitget.com",
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timeout_sec: float = 15.0,
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):
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super().__init__(base_url=base_url, timeout_sec=timeout_sec)
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self.api_key = (api_key or "").strip()
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self.secret_key = (secret_key or "").strip()
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self.passphrase = (passphrase or "").strip()
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if not self.api_key or not self.secret_key or not self.passphrase:
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raise LiveTradingError("Missing Bitget api_key/secret_key/passphrase")
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# Best-effort cache for public contract metadata used to normalize order sizes.
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# Key: f"{product_type}:{symbol}" -> (fetched_at_ts, contract_dict)
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self._contract_cache: Dict[str, Tuple[float, Dict[str, Any]]] = {}
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self._contract_cache_ttl_sec = 300.0
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# Best-effort cache for leverage settings to avoid spamming set-leverage on every tick.
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# Key: f"{product_type}:{symbol}:{margin_coin}:{margin_mode}:{hold_side}:{lever}" -> (fetched_at_ts, True)
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self._lev_cache: Dict[str, Tuple[float, bool]] = {}
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self._lev_cache_ttl_sec = 60.0
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@staticmethod
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def _to_dec(x: Any) -> Decimal:
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try:
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return Decimal(str(x))
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except Exception:
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return Decimal("0")
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@staticmethod
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def _dec_str(d: Decimal) -> str:
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try:
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return format(d, "f")
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except Exception:
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return str(d)
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@staticmethod
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def _floor_to_step(value: Decimal, step: Decimal) -> Decimal:
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if step is None:
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return value
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if value <= 0:
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return Decimal("0")
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try:
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st = Decimal(step)
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except Exception:
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st = Decimal("0")
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if st <= 0:
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return value
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try:
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n = (value / st).to_integral_value(rounding=ROUND_DOWN)
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return n * st
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except Exception:
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return Decimal("0")
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@staticmethod
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def _normalize_margin_mode(margin_mode: str) -> str:
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"""
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Normalize margin mode for Bitget mix orders.
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Bitget expects:
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- crossed
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- isolated
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Our system often uses:
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- cross
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- isolated
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"""
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m = str(margin_mode or "").strip().lower()
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if not m:
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return "crossed"
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if m in ("cross", "crossed"):
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return "crossed"
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if m in ("isolated", "iso"):
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return "isolated"
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return "crossed"
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def _sign(self, ts_ms: str, method: str, path: str, body: str) -> str:
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prehash = f"{ts_ms}{method.upper()}{path}{body}"
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mac = hmac.new(self.secret_key.encode("utf-8"), prehash.encode("utf-8"), hashlib.sha256).digest()
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return base64.b64encode(mac).decode("utf-8")
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def _headers(self, ts_ms: str, sign: str) -> Dict[str, str]:
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return {
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"ACCESS-KEY": self.api_key,
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"ACCESS-SIGN": sign,
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"ACCESS-TIMESTAMP": ts_ms,
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"ACCESS-PASSPHRASE": self.passphrase,
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"Content-Type": "application/json",
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}
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def _signed_request(
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self,
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method: str,
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path: str,
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*,
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json_body: Optional[Dict[str, Any]] = None,
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params: Optional[Dict[str, Any]] = None,
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) -> Dict[str, Any]:
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"""
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Bitget signature is computed over (timestamp + method + request_path + body).
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- Use `data=<serialized_json>` to ensure the signed body matches the sent body.
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- For GET params, include query string into the signed request path.
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"""
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ts_ms = str(int(time.time() * 1000))
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body_str = self._json_dumps(json_body) if json_body is not None else ""
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qs = ""
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if params:
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norm = {str(k): "" if v is None else str(v) for k, v in dict(params).items()}
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qs = urlencode(sorted(norm.items()), doseq=True)
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signed_path = f"{path}?{qs}" if qs else path
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sign = self._sign(ts_ms, method, signed_path, body_str)
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code, data, text = self._request(
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method,
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path,
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params=params,
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data=body_str if body_str else None,
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headers=self._headers(ts_ms, sign),
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)
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if code >= 400:
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raise LiveTradingError(f"Bitget HTTP {code}: {text[:500]}")
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if isinstance(data, dict):
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# Bitget uses code == "00000" for success in many endpoints.
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c = str(data.get("code") or "")
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if c and c not in ("00000", "0"):
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raise LiveTradingError(f"Bitget error: {data}")
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return data if isinstance(data, dict) else {"raw": data}
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def _public_request(self, method: str, path: str, *, params: Optional[Dict[str, Any]] = None) -> Dict[str, Any]:
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code, data, text = self._request(method, path, params=params, headers=None, json_body=None, data=None)
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if code >= 400:
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raise LiveTradingError(f"Bitget HTTP {code}: {text[:500]}")
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if isinstance(data, dict):
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c = str(data.get("code") or "")
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if c and c not in ("00000", "0"):
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raise LiveTradingError(f"Bitget error: {data}")
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return data if isinstance(data, dict) else {"raw": data}
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def get_contract(self, *, symbol: str, product_type: str = "USDT-FUTURES") -> Dict[str, Any]:
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"""
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Fetch contract metadata (best-effort) from public endpoint.
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Endpoint (Bitget v2 mix): GET /api/v2/mix/market/contracts
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Params: productType, symbol(optional)
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"""
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sym = to_bitget_um_symbol(symbol)
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pt = str(product_type or "USDT-FUTURES")
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if not sym:
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return {}
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key = f"{pt}:{sym}"
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now = time.time()
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cached = self._contract_cache.get(key)
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if cached:
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ts, obj = cached
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if obj and (now - float(ts or 0.0)) <= float(self._contract_cache_ttl_sec or 300.0):
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return obj
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raw = self._public_request("GET", "/api/v2/mix/market/contracts", params={"productType": pt, "symbol": sym})
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data = raw.get("data") if isinstance(raw, dict) else None
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items = data if isinstance(data, list) else ([data] if isinstance(data, dict) else [])
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first: Dict[str, Any] = items[0] if isinstance(items, list) and items else {}
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if isinstance(first, dict) and first:
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self._contract_cache[key] = (now, first)
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return first if isinstance(first, dict) else {}
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def _normalize_size(self, *, symbol: str, product_type: str, base_size: float) -> Decimal:
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"""
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Normalize Bitget mix order size.
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This system computes `amount` as base-asset quantity (e.g. BTC amount).
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Bitget mix `size` is typically in contracts; convert using contractSize if available,
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then align to size step / min trade number (best-effort).
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"""
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req_base = self._to_dec(base_size)
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if req_base <= 0:
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return Decimal("0")
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contract: Dict[str, Any] = {}
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try:
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contract = self.get_contract(symbol=symbol, product_type=product_type) or {}
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except Exception:
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contract = {}
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# Convert base qty -> contracts if contractSize is provided.
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ct = self._to_dec(contract.get("contractSize") or contract.get("contractSz") or contract.get("ctVal") or "0")
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qty = req_base
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if ct > 0:
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qty = req_base / ct
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# Determine step size.
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step = self._to_dec(contract.get("sizeMultiplier") or contract.get("sizeStep") or contract.get("lotSize") or "0")
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if step <= 0:
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sp = contract.get("sizePlace")
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try:
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places = int(sp) if sp is not None else 0
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except Exception:
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places = 0
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if places >= 0 and places <= 18:
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step = Decimal("1") / (Decimal("10") ** Decimal(str(places)))
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if step > 0:
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qty = self._floor_to_step(qty, step)
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# Enforce min trade number if present.
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mn = self._to_dec(contract.get("minTradeNum") or contract.get("minSize") or contract.get("minQty") or "0")
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if mn > 0 and qty < mn:
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return Decimal("0")
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return qty
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def ping(self) -> bool:
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code, data, _ = self._request("GET", "/api/v2/public/time")
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return code == 200 and isinstance(data, dict)
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def get_accounts(self, *, product_type: str = "USDT-FUTURES") -> Dict[str, Any]:
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"""
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Private endpoint to validate credentials (best-effort).
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"""
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return self._signed_request("GET", "/api/v2/mix/account/accounts", params={"productType": str(product_type or "USDT-FUTURES")})
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def get_positions(self, *, product_type: str = "USDT-FUTURES") -> Dict[str, Any]:
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"""
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Get all positions (best-effort).
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Endpoint: GET /api/v2/mix/position/all-position
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"""
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return self._signed_request("GET", "/api/v2/mix/position/all-position", params={"productType": str(product_type or "USDT-FUTURES")})
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def set_leverage(
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self,
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*,
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symbol: str,
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leverage: float,
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margin_coin: str = "USDT",
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product_type: str = "USDT-FUTURES",
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margin_mode: str = "crossed",
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hold_side: str = "",
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) -> bool:
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"""
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Best-effort set leverage for Bitget mix.
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NOTE: Bitget requires leverage configured via a private endpoint; order placement may otherwise use defaults.
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Endpoint (v2 mix): POST /api/v2/mix/account/set-leverage (best-effort).
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"""
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sym = to_bitget_um_symbol(symbol)
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pt = str(product_type or "USDT-FUTURES")
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mc = str(margin_coin or "USDT")
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mm = self._normalize_margin_mode(margin_mode)
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hs = str(hold_side or "").strip().lower()
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try:
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lv = int(float(leverage or 0))
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except Exception:
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lv = 0
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if not sym or lv <= 0:
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return False
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cache_key = f"{pt}:{sym}:{mc}:{mm}:{hs}:{lv}"
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now = time.time()
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cached = self._lev_cache.get(cache_key)
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if cached:
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ts, ok = cached
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if ok and (now - float(ts or 0.0)) <= float(self._lev_cache_ttl_sec or 60.0):
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return True
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body: Dict[str, Any] = {
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"symbol": sym,
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"productType": pt,
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"marginCoin": mc,
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"marginMode": mm,
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"leverage": str(lv),
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}
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# Some Bitget accounts require holdSide for hedge mode; keep best-effort.
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if hs in ("long", "short"):
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body["holdSide"] = hs
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try:
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resp = self._signed_request("POST", "/api/v2/mix/account/set-leverage", json_body=body)
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ok = isinstance(resp, dict) and str(resp.get("code") or "") in ("00000", "0", "")
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if ok:
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self._lev_cache[cache_key] = (now, True)
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return bool(ok)
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except Exception:
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return False
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def place_market_order(
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self,
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*,
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symbol: str,
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side: str,
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size: float,
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margin_coin: str = "USDT",
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product_type: str = "USDT-FUTURES",
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margin_mode: str = "crossed",
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reduce_only: bool = False,
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client_order_id: Optional[str] = None,
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) -> LiveOrderResult:
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sym = to_bitget_um_symbol(symbol)
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sd = (side or "").lower()
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if sd not in ("buy", "sell"):
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raise LiveTradingError(f"Invalid side: {side}")
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req = float(size or 0.0)
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sz_dec = self._normalize_size(symbol=symbol, product_type=product_type, base_size=req)
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if float(sz_dec or 0) <= 0:
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raise LiveTradingError(f"Invalid size (below step/min): requested={req}")
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body: Dict[str, Any] = {
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"symbol": sym,
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"productType": str(product_type or "USDT-FUTURES"),
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"marginCoin": str(margin_coin or "USDT"),
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"marginMode": self._normalize_margin_mode(margin_mode),
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"side": sd,
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"orderType": "market",
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"size": self._dec_str(sz_dec),
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}
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if reduce_only:
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body["reduceOnly"] = "YES"
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if client_order_id:
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body["clientOid"] = str(client_order_id)
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raw = self._signed_request("POST", "/api/v2/mix/order/place-order", json_body=body)
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data = raw.get("data") if isinstance(raw, dict) else None
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exchange_order_id = ""
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if isinstance(data, dict):
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exchange_order_id = str(data.get("orderId") or data.get("clientOid") or "")
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return LiveOrderResult(
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exchange_id="bitget",
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exchange_order_id=exchange_order_id,
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filled=0.0,
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avg_price=0.0,
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raw=raw,
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)
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def place_limit_order(
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self,
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*,
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symbol: str,
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side: str,
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size: float,
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price: float,
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margin_coin: str = "USDT",
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product_type: str = "USDT-FUTURES",
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margin_mode: str = "crossed",
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reduce_only: bool = False,
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post_only: bool = False,
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client_order_id: Optional[str] = None,
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) -> LiveOrderResult:
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sym = to_bitget_um_symbol(symbol)
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sd = (side or "").lower()
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if sd not in ("buy", "sell"):
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raise LiveTradingError(f"Invalid side: {side}")
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req = float(size or 0.0)
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px = float(price or 0.0)
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if req <= 0 or px <= 0:
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raise LiveTradingError("Invalid size/price")
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sz_dec = self._normalize_size(symbol=symbol, product_type=product_type, base_size=req)
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if float(sz_dec or 0) <= 0:
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raise LiveTradingError(f"Invalid size (below step/min): requested={req}")
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body: Dict[str, Any] = {
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"symbol": sym,
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"productType": str(product_type or "USDT-FUTURES"),
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"marginCoin": str(margin_coin or "USDT"),
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"marginMode": self._normalize_margin_mode(margin_mode),
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"side": sd,
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"orderType": "limit",
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"price": str(px),
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"size": self._dec_str(sz_dec),
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}
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# Force maker behavior when requested (avoid taker fills).
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if post_only:
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body["force"] = "post_only"
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else:
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body["force"] = "gtc"
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if reduce_only:
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body["reduceOnly"] = "YES"
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if client_order_id:
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body["clientOid"] = str(client_order_id)
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raw = self._signed_request("POST", "/api/v2/mix/order/place-order", json_body=body)
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data = raw.get("data") if isinstance(raw, dict) else None
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exchange_order_id = str(data.get("orderId") or data.get("clientOid") or "") if isinstance(data, dict) else ""
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return LiveOrderResult(exchange_id="bitget", exchange_order_id=exchange_order_id, filled=0.0, avg_price=0.0, raw=raw)
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def cancel_order(self, *, symbol: str, product_type: str, margin_coin: str = "USDT", order_id: str = "", client_oid: str = "") -> Dict[str, Any]:
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body: Dict[str, Any] = {
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"symbol": to_bitget_um_symbol(symbol),
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"productType": str(product_type or "USDT-FUTURES"),
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"marginCoin": str(margin_coin or "USDT"),
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}
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if order_id:
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body["orderId"] = str(order_id)
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elif client_oid:
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body["clientOid"] = str(client_oid)
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else:
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raise LiveTradingError("Bitget cancel_order requires order_id or client_oid")
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return self._signed_request("POST", "/api/v2/mix/order/cancel-order", json_body=body)
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def get_order_detail(
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self,
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*,
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symbol: str,
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product_type: str,
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order_id: str = "",
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client_oid: str = "",
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) -> Dict[str, Any]:
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params: Dict[str, Any] = {
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"symbol": to_bitget_um_symbol(symbol),
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"productType": str(product_type or "USDT-FUTURES"),
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}
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if order_id:
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params["orderId"] = str(order_id)
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elif client_oid:
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params["clientOid"] = str(client_oid)
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else:
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raise LiveTradingError("Bitget get_order_detail requires order_id or client_oid")
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return self._signed_request("GET", "/api/v2/mix/order/detail", params=params)
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def get_order_fills(
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self,
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*,
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symbol: str,
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product_type: str,
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order_id: str,
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) -> Dict[str, Any]:
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params: Dict[str, Any] = {
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"orderId": str(order_id),
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"productType": str(product_type or "USDT-FUTURES"),
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"symbol": to_bitget_um_symbol(symbol),
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}
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return self._signed_request("GET", "/api/v2/mix/order/fills", params=params)
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def wait_for_fill(
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self,
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*,
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symbol: str,
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product_type: str = "USDT-FUTURES",
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order_id: str,
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client_oid: str = "",
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max_wait_sec: float = 3.0,
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poll_interval_sec: float = 0.5,
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) -> Dict[str, Any]:
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"""
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Poll order fills/detail to obtain (best-effort) executed size and average price.
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Returns:
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{
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"filled": float,
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"avg_price": float,
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"fee": float,
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"fee_ccy": str,
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"state": str,
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"detail": {...},
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"fills": {...}
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}
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"""
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end_ts = time.time() + float(max_wait_sec or 0.0)
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last_detail: Dict[str, Any] = {}
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last_fills: Dict[str, Any] = {}
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state = ""
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# For robust parsing: contractSize helps converting contracts->base if needed.
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ct = Decimal("0")
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try:
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contract = self.get_contract(symbol=symbol, product_type=product_type) or {}
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ct = self._to_dec(contract.get("contractSize") or contract.get("contractSz") or contract.get("ctVal") or "0")
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except Exception:
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ct = Decimal("0")
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while True:
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# Prefer fills endpoint to calculate accurate weighted average.
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try:
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last_fills = self.get_order_fills(symbol=symbol, product_type=product_type, order_id=str(order_id))
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data = last_fills.get("data") if isinstance(last_fills, dict) else None
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fill_list = []
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if isinstance(data, dict):
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fill_list = data.get("fillList") or []
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total_base = Decimal("0")
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total_quote = Decimal("0")
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total_fee = Decimal("0")
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fee_ccy = ""
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if isinstance(fill_list, list):
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for f in fill_list:
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try:
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# Bitget fills may provide either baseVolume or size.
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# Our system standardizes on base-asset quantity.
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sz_base = self._to_dec(f.get("baseVolume") or "0")
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if sz_base <= 0:
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sz_contracts = self._to_dec(f.get("size") or f.get("fillSize") or "0")
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if sz_contracts > 0 and ct > 0:
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sz_base = sz_contracts * ct
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px = self._to_dec(f.get("fillPrice") or f.get("price") or "0")
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fee_v = f.get("fee")
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if fee_v is None:
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fee_v = f.get("fillFee")
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fee = self._to_dec(fee_v or "0")
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ccy = str(f.get("feeCoin") or f.get("feeCcy") or f.get("fillFeeCoin") or "").strip()
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if sz_base > 0 and px > 0:
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total_base += sz_base
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total_quote += sz_base * px
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if fee != 0:
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# Fees may be negative; store absolute cost.
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total_fee += abs(fee)
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if (not fee_ccy) and ccy:
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fee_ccy = ccy
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except Exception:
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continue
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if total_base > 0 and total_quote > 0:
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return {
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"filled": float(total_base),
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"avg_price": float(total_quote / total_base),
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"fee": float(total_fee),
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"fee_ccy": str(fee_ccy or ""),
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"state": state,
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"detail": last_detail,
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"fills": last_fills,
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}
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except Exception:
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pass
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# Fall back to order detail (state + sometimes avg/filled fields).
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try:
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last_detail = self.get_order_detail(
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symbol=symbol,
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product_type=product_type,
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order_id=str(order_id or ""),
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client_oid=str(client_oid or ""),
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)
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d = last_detail.get("data") if isinstance(last_detail, dict) else None
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if isinstance(d, dict):
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state = str(d.get("state") or d.get("status") or "")
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avg = float(d.get("priceAvg") or d.get("fillPrice") or 0.0) if (d.get("priceAvg") or d.get("fillPrice")) else 0.0
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filled = float(d.get("baseVolume") or d.get("filledQty") or 0.0) if (d.get("baseVolume") or d.get("filledQty")) else 0.0
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if filled > 0 and avg > 0:
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return {"filled": filled, "avg_price": avg, "fee": 0.0, "fee_ccy": "", "state": state, "detail": last_detail, "fills": last_fills}
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if state in ("filled", "canceled", "cancelled"):
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return {"filled": filled, "avg_price": avg, "fee": 0.0, "fee_ccy": "", "state": state, "detail": last_detail, "fills": last_fills}
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except Exception:
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pass
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if time.time() >= end_ts:
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return {"filled": 0.0, "avg_price": 0.0, "fee": 0.0, "fee_ccy": "", "state": state, "detail": last_detail, "fills": last_fills}
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time.sleep(float(poll_interval_sec or 0.5))
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