Introduce Service Id Types

Co-authored-by: Scott Nonnenberg <scott@signal.org>

ts/util/isValidUuid.ts

@@ -0,0 +1,18 @@
+// Copyright 2023 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+const UUID_REGEXP =
+  /^[0-9A-F]{8}-[0-9A-F]{4}-4[0-9A-F]{3}-[89AB][0-9A-F]{3}-[0-9A-F]{12}$/i;
+
+export const isValidUuid = (value: unknown): value is string => {
+  if (typeof value !== 'string') {
+    return false;
+  }
+
+  // Zero UUID is a valid uuid.
+  if (value === '00000000-0000-0000-0000-000000000000') {
+    return true;
+  }
+
+  return UUID_REGEXP.test(value);
+};