3 files changed, 22 insertions, 7 deletions
diff --git a/lib/wallet/db.ts b/lib/wallet/db.ts
index 2503468d5..9374aa447 100644
--- a/lib/wallet/db.ts
+++ b/lib/wallet/db.ts
@@ -25,7 +25,7 @@
  */
 
 const DB_NAME = "taler";
-const DB_VERSION = 1;
+const DB_VERSION = 5;
 
 /**
  * Return a promise that resolves
@@ -45,7 +45,8 @@ export function openTalerDb(): Promise<IDBDatabase> {
       console.log("DB: upgrade needed: oldVersion = " + e.oldVersion);
       switch (e.oldVersion) {
         case 0: // DB does not exist yet
-          const exchanges = db.createObjectStore("exchanges", {keyPath: "baseUrl"});
+          const exchanges = db.createObjectStore("exchanges",
+                                                 {keyPath: "baseUrl"});
           exchanges.createIndex("pubKey", "masterPublicKey");
           db.createObjectStore("reserves", {keyPath: "reserve_pub"});
           db.createObjectStore("denoms", {keyPath: "denomPub"});
@@ -68,6 +69,15 @@ export function openTalerDb(): Promise<IDBDatabase> {
                                                });
           history.createIndex("timestamp", "timestamp");
           break;
+        default:
+          if (e.oldVersion != DB_VERSION) {
+            window.alert("Incompatible wallet dababase version, please reset" +
+                         " db.");
+            chrome.browserAction.setBadgeText({text: "R!"});
+            chrome.browserAction.setBadgeBackgroundColor({color: "#F00"});
+            throw Error("incompatible DB");
+          }
+          break;
       }
     };
   });
diff --git a/lib/wallet/wallet.ts b/lib/wallet/wallet.ts
index 94ac8ee8a..3764edfbc 100644
--- a/lib/wallet/wallet.ts
+++ b/lib/wallet/wallet.ts
@@ -912,7 +912,10 @@ export class Wallet {
 
     return Query(this.db)
       .iter("coins")
-      .reduce(collectBalances, {});
+      .reduce(collectBalances, {})
+      .then(byCurrency => {
+        return {balances: byCurrency};
+      });
   }
 
 
@@ -922,7 +925,7 @@ export class Wallet {
   getHistory(): Promise<any[]> {
     function collect(x, acc) {
       acc.push(x);
-      return acc;
+      return {history: acc};
     }
 
     return Query(this.db)
diff --git a/lib/wallet/wxMessaging.ts b/lib/wallet/wxMessaging.ts
index a6b3f9d1b..d49a80efb 100644
--- a/lib/wallet/wxMessaging.ts
+++ b/lib/wallet/wxMessaging.ts
@@ -47,9 +47,11 @@ function makeHandlers(db: IDBDatabase,
       return exportDb(db);
     },
     ["reset"]: function(detail) {
-      let tx = db.transaction(db.objectStoreNames, 'readwrite');
-      for (let i = 0; i < db.objectStoreNames.length; i++) {
-        tx.objectStore(db.objectStoreNames[i]).clear();
+      if (db) {
+        let tx = db.transaction(db.objectStoreNames, 'readwrite');
+        for (let i = 0; i < db.objectStoreNames.length; i++) {
+          tx.objectStore(db.objectStoreNames[i]).clear();
+        }
       }
       deleteDb();