fix: 🪲💥Fixed #24

package.json

@@ -9,6 +9,7 @@
     "watch:src": "cross-env NODE_ENV=development MANIFEST_VERSION=3 webpack --watch --progress",
     "watch:dist": "mv3-hot-reload",
     "build": "cross-env NODE_ENV=production webpack",
+    "prebuild": "rimraf ./dist && yarn clear:webpack-cache",
     "build-all": "rimraf ./dist && run-s build:*",
     "build:chrome": "cross-env TARGET_BROWSER=chrome MANIFEST_VERSION=3 run-s build",
     "build:firefox": "cross-env TARGET_BROWSER=firefox MANIFEST_VERSION=2 run-s build",
@@ -19,6 +20,7 @@
     "lint": "eslint src",
     "lint:fix": "prettier \"./**/*\" --write --ignore-unknown",
     "clear:lint": "rimraf node_modules/.cache/eslint-loader",
+    "clear:webpack-cache": "rimraf node_modules/.cache/webpack",
     "prepare": "husky install"
   },
   "dependencies": {

public/sw.js

@@ -1,8 +1,15 @@
 /* eslint-disable */
+
 try {
   const window = globalThis;
   // This is the file produced by webpack
   importScripts('background.js');
+
+  // wake up signal
+  chrome.runtime.onMessage.addListener(() => {
+    console.debug('⏰ Wake up, Sleepy Worker! ☕')
+  })
+
 } catch (e) {
   // This will allow you to see error logs during registration/execution
   console.error(e);

src/contentScript.ts

@@ -1,7 +1,43 @@
+import browser from 'webextension-polyfill';
+
 import { IntercomClient } from 'lib/intercom/client';
 import { serializeError } from 'lib/intercom/helpers';
 import { XTMessageType, TempleResponse } from 'lib/messaging';
 
+async function testIntercomConnection() {
+  try {
+    await getIntercom().request({
+      type: XTMessageType.PageRequest,
+      payload: 'PING'
+    });
+  } catch (err: any) {
+    console.debug('Intercom connection corrupted', err);
+    unsubscribe();
+    intercom?.destroy();
+    intercom = null;
+    throw err;
+  }
+}
+
+function keepSWAlive() {
+  setTimeout(async function () {
+    try {
+      await browser.runtime.sendMessage('wakeup');
+      // what to do here?!
+      await testIntercomConnection();
+      console.debug('✅ Service Worker still listening');
+    } catch (e) {
+      console.debug('😣 Wakeup failed - Service Worker is deaf!');
+    }
+    keepSWAlive();
+  }, 10_000);
+}
+
+const manifest = browser.runtime.getManifest();
+if (manifest.manifest_version === 3) {
+  keepSWAlive();
+}
+
 interface SignumPageMessage {
   type: SignumPageMessageType;
   payload: any;
@@ -28,7 +64,6 @@ window.addEventListener(
 
 function walletRequest(evt: MessageEvent) {
   const { payload, reqId } = evt.data as SignumPageMessage;
-
   getIntercom()
     .request({
       type: XTMessageType.PageRequest,
@@ -77,12 +112,12 @@ function handleWalletNotification(msg: any) {
   }
 }
 
-let intercom: IntercomClient;
-
+let intercom: IntercomClient | null;
+let unsubscribe: () => void;
 function getIntercom() {
   if (!intercom) {
     intercom = new IntercomClient();
-    intercom.subscribe(handleWalletNotification);
+    unsubscribe = intercom.subscribe(handleWalletNotification);
   }
   return intercom;
 }

src/lib/intercom/server.ts

@@ -18,6 +18,7 @@ export class IntercomServer {
     });
 
     this.handleMessage = this.handleMessage.bind(this);
+    console.debug('Intercom Server is up...');
   }
 
   isConnected(port: Runtime.Port) {