增加K线

2026-05-30 10:35:25 +08:00
parent 74bd241579
commit 53959a9008
8 changed files with 683 additions and 134 deletions
@@ -0,0 +1,44 @@
+"""K 线周期常量与每周期 bar 数 / 缓存 TTL。"""
+
+CHART_INTERVALS: tuple[str, ...] = ("5m", "15m", "30m", "1h", "4h", "1d", "1w")
+
+LONG_INTERVALS: frozenset[str] = frozenset({"1d", "1w"})
+
+# 1d 及以上 500 根；以下 1000 根
+INTERVAL_LIMITS: dict[str, int] = {
+    "5m": 1000,
+    "15m": 1000,
+    "30m": 1000,
+    "1h": 1000,
+    "4h": 1000,
+    "1d": 500,
+    "1w": 500,
+}
+
+# 预取 / 本地 freshness（分钟）
+INTERVAL_CACHE_MINUTES: dict[str, int] = {
+    "5m": 5,
+    "15m": 15,
+    "30m": 15,
+    "1h": 30,
+    "4h": 30,
+    "1d": 60,
+    "1w": 60,
+}
+
+
+def validate_interval(interval: str) -> str:
+    iv = interval.lower().strip()
+    if iv not in CHART_INTERVALS:
+        raise ValueError(f"unsupported interval: {interval}")
+    return iv
+
+
+def limit_for_interval(interval: str) -> int:
+    iv = validate_interval(interval)
+    return INTERVAL_LIMITS[iv]
+
+
+def cache_minutes_for_interval(interval: str) -> int:
+    iv = validate_interval(interval)
+    return INTERVAL_CACHE_MINUTES[iv]