Adding strong checks on messages exchanged using generic-type-guard

front/src/Api/Events/ChatEvent.ts

@@ -0,0 +1,8 @@
+import * as tg from "generic-type-guard";
+
+export const isChatEvent =
+    new tg.IsInterface().withProperties({
+        message: tg.isString,
+        author: tg.isString,
+    }).get();
+export type ChatEvent = tg.GuardedType<typeof isChatEvent>;

front/src/Api/Events/IframeEvent.ts

@@ -0,0 +1,7 @@
+interface IframeEvent {
+    type: string;
+    data: unknown;
+}
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export const isIframeEventWrapper = (event: any): event is IframeEvent => typeof event.type === 'string' && typeof event.data === 'object';