From c03100cc0d79f3b8504c6f41c32edcfdf5d17e57 Mon Sep 17 00:00:00 2001
From: Florian Dold <florian.dold@gmail.com>
Date: Fri, 18 Dec 2015 13:46:40 +0100
Subject: [PATCH] error message

---
 extension/background/wallet.js | 3 +++
 extension/background/wallet.ts | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/extension/background/wallet.js b/extension/background/wallet.js
index 6e4438a0d..8aec5ecb1 100644
--- a/extension/background/wallet.js
+++ b/extension/background/wallet.js
@@ -81,6 +81,9 @@ function getPossibleMintCoins(db, paymentAmount, depositFeeLimit, allowedMints)
                 .get(info.master_pub);
             req_mints.onsuccess = (e) => {
                 let mint = req_mints.result;
+                if (!mint) {
+                    throw Error("no matching mint in index");
+                }
                 let req_coins = tx.objectStore("coins")
                     .index("mintBaseUrl")
                     .openCursor(IDBKeyRange.only(mint.baseUrl));
diff --git a/extension/background/wallet.ts b/extension/background/wallet.ts
index 7fee5490e..ee406d2ed 100644
--- a/extension/background/wallet.ts
+++ b/extension/background/wallet.ts
@@ -157,6 +157,9 @@ function getPossibleMintCoins(db: IDBDatabase,
                         .get(info.master_pub);
       req_mints.onsuccess = (e) => {
         let mint: Db.Mint = req_mints.result;
+        if (!mint) {
+          throw Error("no matching mint in index");
+        }
         let req_coins = tx.objectStore("coins")
                           .index("mintBaseUrl")
                           .openCursor(IDBKeyRange.only(mint.baseUrl));