feat: create user store middleware

src/middleware/userStore.ts

@@ -0,0 +1,22 @@
+import { AppMiddleware } from '@/app.ts';
+import { UserStore } from '@/storages/UserStore.ts';
+import { eventsDB } from '@/storages.ts';
+import { HTTPException } from 'hono';
+
+/** User Store middleware.
+ *  Throw a 500 if can't set the `userStore` */
+const setUserStore: AppMiddleware = async (c, next) => {
+  const pubkey = c.get('pubkey') as string;
+
+  try {
+    const store = new UserStore(pubkey, eventsDB);
+    c.set('userStore', store);
+  } catch (e) {
+    console.log(e);
+    throw new HTTPException(500);
+  }
+
+  await next();
+};
+
+export { setUserStore };