add better access control

packages/redis/cachable.ts

@@ -0,0 +1,17 @@
+import { redis } from './redis';
+
+export function cacheable<T extends (...args: any) => any>(
+  fn: T,
+  expire: number
+) {
+  return async function (...args: Parameters<T>): Promise<ReturnType<T>> {
+    const key = `cachable:${fn.name}:${JSON.stringify(args)}`;
+    const cached = await redis.get(key);
+    if (cached) {
+      return JSON.parse(cached);
+    }
+    const result = await fn(...(args as any));
+    redis.setex(key, expire, JSON.stringify(result));
+    return result;
+  };
+}