addded a simple check to ensure that the url being navigated to via a…

… tkn request is available

index.html

@@ -107,7 +107,7 @@
             tokenIdName: "id",
             image:
               "https://raw.githubusercontent.com/TokenScript/token-negotiator/main/mock-images/devcon.svg",
-            tokenOrigin: "http://localhost:3002/",
+            tokenOrigin: "http://localhost:3000/",
             attestationOrigin: "https://test.attestation.id/",
             base64senderPublicKeys: {
               6: "MIIBMzCB7AYHKoZIzj0CATCB4AIBATAsBgcqhkjOPQEBAiEA/////////////////////////////////////v///C8wRAQgAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEIAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHBEEEeb5mfvncu6xVoGKVzocLBwKb/NstzijZWfKBWxb4F5hIOtp3JqPEZV2k+/wOEQio/Re0SKaFVBmcR9CP+xDUuAIhAP////////////////////66rtzmr0igO7/SXozQNkFBAgEBA0IABGMxHraqggr2keTXszIcchTjYjH5WXpDaBOYgXva82mKcGnKgGRORXSmcjWN2suUCMkLQj3UNlZCFWF10wIrrlw=",

src/client/index.ts

@@ -91,11 +91,13 @@ export const enum UIUpdateEventType {
 export enum ClientError {
 	POPUP_BLOCKED = 'POPUP_BLOCKED',
 	USER_ABORT = 'USER_ABORT',
+	ISSUER_UNAVAILABLE = 'ISSUER_UNAVAILABLE',
 }
 
 export enum ClientErrorMessage {
 	POPUP_BLOCKED = 'Please add an exception to your popup blocker before continuing.',
 	USER_ABORT = 'The user aborted the process.',
+	ISSUER_UNAVAILABLE = 'The issuer is unavailable.',
 }
 
 export class Client {

src/core/messaging.ts

@@ -42,15 +42,29 @@ export class Messaging {
 	iframe: any = null
 	listenerSet = false
 
+	async isWebsiteAvailable(url) {
+		return fetch(url, {
+			method: 'HEAD',
+			cache: 'no-store',
+		})
+			.then((response) => {
+				console.log('response', response)
+				return response.status === 200
+			})
+			.catch((error) => {
+				throw error
+			})
+	}
+
 	async sendMessage(
 		request: RequestInterfaceBase,
 		forceTab = false,
 		redirectUrl: false | string = false,
 	): Promise<ResponseInterfaceBase | void> {
 		logger(2, 'Send request: ')
 		logger(2, request)
-
 		if (redirectUrl) {
+			await this.isWebsiteAvailable(request.origin)
 			this.sendRedirect(request, redirectUrl)
 			return
 		}

src/version.ts

@@ -1,2 +1,2 @@
 // modified by build process.
-export const VERSION = '3.0.2'
+export const VERSION = '3.1.0'