chore: sync submodule state (parent ref update)

Made-with: Cursor

services/token-aggregation/src/api/middleware/cache.ts

@@ -0,0 +1,46 @@
+import { Request, Response, NextFunction } from 'express';
+
+interface CacheEntry {
+  data: any;
+  expiresAt: number;
+}
+
+const cache = new Map<string, CacheEntry>();
+const DEFAULT_TTL = 60 * 1000; // 1 minute
+
+export function cacheMiddleware(ttl: number = DEFAULT_TTL) {
+  return (req: Request, res: Response, next: NextFunction) => {
+    const key = `${req.method}:${req.originalUrl}`;
+    const cached = cache.get(key);
+
+    if (cached && cached.expiresAt > Date.now()) {
+      return res.json(cached.data);
+    }
+
+    // Store original json method
+    const originalJson = res.json.bind(res);
+
+    // Override json method to cache response
+    res.json = function (body: any) {
+      cache.set(key, {
+        data: body,
+        expiresAt: Date.now() + ttl,
+      });
+      return originalJson(body);
+    };
+
+    next();
+  };
+}
+
+export function clearCache(): void {
+  cache.clear();
+}
+
+export function clearCacheForPattern(pattern: string): void {
+  for (const key of cache.keys()) {
+    if (key.includes(pattern)) {
+      cache.delete(key);
+    }
+  }
+}