Fix failed dApp connector API calls after service worker going to sleep

packages/yoroi-extension/app/api/ada/lib/storage/database/utils.js

@@ -193,7 +193,7 @@ export async function raii<T>(
       )
     ).join('\n');
     // eslint-disable-next-line no-console
-    console.error('rolling back Lovefield query for\n' + uniqueTableNames + ' with error ' + JSON.stringify(e));
+    console.error('rolling back Lovefield query for\n' + uniqueTableNames + ' with error ' + e.message);
     await tx.rollback();
     throw e;
   }

packages/yoroi-extension/chrome/content-scripts/inject.js

@@ -131,6 +131,24 @@ function listenToBackgroundServiceWorker() {
     connected = true;
 }
 
+const RETRY_COUNT = 1;
+const RETRY_DELAY = 3000;
+
+async function sendMessageToBackground(message) {
+  for (let c = 0; c <= RETRY_COUNT; c++) {
+    try {
+      return chrome.runtime.sendMessage(message);
+    } catch (error) {
+      if (error.message.includes('Could not establish connection. Receiving end does not exist.')) {
+        await new Promise(resolve => setTimeout(resolve, RETRY_DELAY));
+        continue;
+      } else {
+        throw error;
+      }
+    }
+  }
+}
+
 async function handleConnectorConnectRequest(event, protocol) {
     const requestIdentification = event.data.requestIdentification;
     if ((cardanoApiInjected && !requestIdentification) && connected) {
@@ -158,7 +176,7 @@ async function handleConnectorConnectRequest(event, protocol) {
                   },
                   protocol,
               };
-              chrome.runtime.sendMessage(message);
+              sendMessageToBackground(message);
           });
     }
 }
@@ -169,7 +187,7 @@ async function handleConnectorRpcRequest(event) {
         listenToBackgroundServiceWorker();
     }
     try {
-        await chrome.runtime.sendMessage(event.data);
+        await sendMessageToBackground(event.data);
     } catch (e) {
         console.error(`Could not send RPC to Yoroi: ${e}`);
         window.postMessage({

packages/yoroi-extension/chrome/extension/background/state/databaseManager.js

@@ -6,24 +6,26 @@ import { migrateNoRefresh } from '../../../../app/api/common/migration';
 import LocalStorageApi from '../../../../app/api/localStorage/index';
 import type { lf$Database, } from 'lovefield';
 
-let dbCache = null;
+let loadDbPromiseCache = null;
 let migratePromiseCache = null;
 
 export async function getDb(): Promise<lf$Database> {
   const localStorageApi = new LocalStorageApi();
 
-  if (!dbCache) {
-    dbCache = await loadLovefieldDB(schema.DataStoreType.INDEXED_DB);
+  if (!loadDbPromiseCache) {
+    loadDbPromiseCache = loadLovefieldDB(schema.DataStoreType.INDEXED_DB);
   }
 
+  const db = await loadDbPromiseCache;
+
   if (!migratePromiseCache) {
     migratePromiseCache =  migrateNoRefresh({
       localStorageApi,
-      persistentDb: dbCache,
+      persistentDb: db,
       currVersion: environment.getVersion(),
     });
   }
   await migratePromiseCache;
 
-  return dbCache;
+  return db;
 }