Download the backup json as a file

src/sdk/Iframe.tsx

@@ -12,6 +12,9 @@ function Iframe({ showIframe = false }: IframeProps) {
     if (iframeRef.current) {
       IframeReference.setIframe(iframeRef.current);
     }
+    return () => {
+      IframeReference.setIframe(null);
+    };
   }, [iframeRef.current]);
 
   return (

src/sdk/IframeReference.ts

@@ -5,11 +5,6 @@ export default class IframeReference {
   private constructor() { }
 
   public static setTargetOrigin(targetOrigin: string): void {
-    if (this.targetOrigin) {
-      console.debug("targetOrigin is already set");
-      return;
-    }
-
     try {
       new URL(targetOrigin);
       this.targetOrigin = targetOrigin;

src/sdk/MessageBus.ts

@@ -809,10 +809,17 @@ export default class MessageBus {
     }
 
     try {
+      const iframe = IframeReference.getIframe();
+
+      if (event.source !== iframe.contentWindow) {
+        console.error('[MessageBus] handleMessage: source not match');
+        return;
+      }
+
       const targetOrigin = IframeReference.getTargetOrigin();
 
       if (event.origin !== targetOrigin) {
-        throw new Error(`origin don't match: expected ${targetOrigin}, got ${event.origin} with type ${event.data.type}`);
+        throw new Error('origin not match');
       }
 
       if (!event.data || typeof event.data !== 'object') {