Notifications interface (#5354)

Co-authored-by: Apoorv Mishra <apoorvmishra101092@gmail.com>

server/utils/crypto.ts

@@ -0,0 +1,19 @@
+import crypto from "crypto";
+
+/**
+ * Compare two strings in constant time to prevent timing attacks.
+ *
+ * @param a The first string to compare
+ * @param b The second string to compare
+ * @returns Whether the strings are equal
+ */
+export function safeEqual(a?: string, b?: string) {
+  if (!a || !b) {
+    return false;
+  }
+  if (a.length !== b.length) {
+    return false;
+  }
+
+  return crypto.timingSafeEqual(Buffer.from(a), Buffer.from(b));
+}