Fix Cloudflare tokens issuance domain

Move from captcha.website to issuance.privacypass.cloudflare.com.
This makes Cloudflare more identifiable as an issuer for Cloudflare
tokens.

README.md

@@ -21,7 +21,7 @@ Home page: **[https://privacypass.github.io][pp-home]**
 **Privacy Pass Providers:**  🟩 [Cloudflare][cf-url]  🟩 [hCaptcha][hc-url]
 
 [pp-home]: https://privacypass.github.io/
-[cf-url]: https://captcha.website/
+[cf-url]: https://issuance.privacypass.cloudflare.com/
 [hc-url]: https://www.hcaptcha.com/privacy-pass/
 [chrome-store]: https://chrome.google.com/webstore/detail/privacy-pass/ajhmfdgkijocedmfjonnpjfojldioehi/
 [firefox-store]: https://addons.mozilla.org/firefox/addon/privacy-pass/

src/background/index.ts

@@ -113,11 +113,13 @@ chrome.runtime.onMessage.addListener((request, _sender, sendResponse) => {
 // TODO It's better to move this to the provider class. Let's figure out how to do it later.
 // Removes cookies for captcha.website to enable getting more tokens in the future.
 chrome.cookies.onChanged.addListener((changeInfo) => {
+    const cloudflareDomains = ['captcha.website', 'issuance.privacypass.cloudflare.com'];
+    const domain = changeInfo.cookie.domain.replace(/^\./, '');
     if (
         !changeInfo.removed &&
-        changeInfo.cookie.domain === '.captcha.website' &&
+        cloudflareDomains.includes(domain) &&
         changeInfo.cookie.name === 'cf_clearance'
     ) {
-        chrome.cookies.remove({ url: 'https://captcha.website', name: 'cf_clearance' });
+        chrome.cookies.remove({ url: `https://${domain}`, name: 'cf_clearance' });
     }
 });

src/background/providers/cloudflare.test.ts

@@ -395,6 +395,20 @@ describe('redemption', () => {
             expect(result).toBeUndefined();
         });
 
+        test('issuance.privacypass.cloudflare.com response', () => {
+            const storage = new StorageMock();
+            const updateIcon = jest.fn();
+            const navigateUrl = jest.fn();
+
+            const provider = new CloudflareProvider(storage, { updateIcon, navigateUrl });
+            const tokens = [new Token(), new Token(), new Token()];
+            provider['setStoredTokens'](tokens);
+            const details = validDetails;
+            details.url = 'https://issuance.privacypass.cloudflare.com/';
+            const result = provider.handleHeadersReceived(details);
+            expect(result).toBeUndefined();
+        });
+
         /*
          * The response is invalid if any of the followings is true:
          * 1. The status code is not 403.

src/background/providers/cloudflare.ts

@@ -17,7 +17,7 @@ const COMMITMENT_URL =
 const QUALIFIED_BODY_PARAMS = ['md'];
 
 const CHL_BYPASS_SUPPORT = 'cf-chl-bypass';
-const DEFAULT_ISSUING_HOSTNAME = 'captcha.website';
+const ISSUING_HOSTNAMES = ['captcha.website', 'issuance.privacypass.cloudflare.com'];
 
 const REFERER_QUERY_PARAM = '__cf_chl_tk';
 const QUERY_PARAM = '__cf_chl_f_tk';
@@ -317,7 +317,7 @@ export class CloudflareProvider implements Provider {
     ): chrome.webRequest.BlockingResponse | void {
         // Don't redeem a token in the issuing website.
         const url = new URL(details.url);
-        if (url.host === DEFAULT_ISSUING_HOSTNAME) {
+        if (ISSUING_HOSTNAMES.includes(url.host)) {
             return;
         }
 

src/popup/components/CloudflareButton/index.tsx

@@ -12,7 +12,7 @@ export function CloudflareButton(): JSX.Element {
     });
 
     const openHomePage = () => {
-        chrome.tabs.create({ url: 'https://captcha.website' });
+        chrome.tabs.create({ url: 'https://issuance.privacypass.cloudflare.com' });
     };
 
     return (