creat

Signed-off-by: TIANHE <TIANHE@GMAIL.COM>

backend_api_python/app/services/live_trading/base.py

@@ -0,0 +1,79 @@
+"""
+Base REST client helpers for direct exchange connections.
+
+Notes:
+- Keep this minimal and dependency-light (requests only).
+- All secrets must be excluded from logs.
+"""
+
+from __future__ import annotations
+
+import json
+import time
+from dataclasses import dataclass
+from typing import Any, Dict, Optional, Tuple
+
+import requests
+
+
+@dataclass
+class LiveOrderResult:
+    exchange_id: str
+    exchange_order_id: str
+    filled: float
+    avg_price: float
+    raw: Dict[str, Any]
+
+
+class LiveTradingError(Exception):
+    pass
+
+
+class BaseRestClient:
+    def __init__(self, base_url: str, timeout_sec: float = 15.0):
+        self.base_url = (base_url or "").rstrip("/")
+        self.timeout_sec = float(timeout_sec)
+
+    def _url(self, path: str) -> str:
+        p = str(path or "")
+        if not p.startswith("/"):
+            p = "/" + p
+        return f"{self.base_url}{p}"
+
+    def _request(
+        self,
+        method: str,
+        path: str,
+        *,
+        params: Optional[Dict[str, Any]] = None,
+        json_body: Optional[Dict[str, Any]] = None,
+        headers: Optional[Dict[str, str]] = None,
+        data: Optional[Any] = None,
+    ) -> Tuple[int, Dict[str, Any], str]:
+        url = self._url(path)
+        resp = requests.request(
+            method=str(method or "GET").upper(),
+            url=url,
+            params=params or None,
+            json=json_body if json_body is not None else None,
+            data=data,
+            headers=headers or None,
+            timeout=self.timeout_sec,
+        )
+        text = resp.text or ""
+        parsed: Dict[str, Any] = {}
+        try:
+            parsed = resp.json() if text else {}
+        except Exception:
+            parsed = {"raw_text": text[:2000]}
+        return int(resp.status_code), parsed, text
+
+    @staticmethod
+    def _now_ms() -> int:
+        return int(time.time() * 1000)
+
+    @staticmethod
+    def _json_dumps(obj: Any) -> str:
+        return json.dumps(obj, ensure_ascii=False, separators=(",", ":"))
+
+