From e2f36d493512874fe0c3494ea9ecedff88e6dc16 Mon Sep 17 00:00:00 2001
From: janherich <jan.herich@gmail.com>
Date: Mon, 25 Sep 2017 10:32:57 +0200
Subject: [PATCH] Be more defensive when checking user balance

---
 resources/js/bots/wallet/bot.js          | 15 ++++++++++++++-
 resources/js/bots/wallet/translations.js |  2 ++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/resources/js/bots/wallet/bot.js b/resources/js/bots/wallet/bot.js
index f6d32279ff..8426079fd4 100644
--- a/resources/js/bots/wallet/bot.js
+++ b/resources/js/bots/wallet/bot.js
@@ -321,7 +321,20 @@ function validateSend(params, context) {
         };
     }
 
-    var balance = web3.eth.getBalance(context.from);
+    try {
+        var balance = web3.eth.getBalance(context.from);
+        if (isNaN(balance)) {
+            throw new Error();
+        }
+    } catch (err) {
+        return {
+            markup: status.components.validationMessage(
+                I18n.t('validation_internal_title'),
+                I18n.t('validation_balance')
+            )
+        };
+    }
+    
     var fee = calculateFee(
         params["bot-db"]["sliderValue"],
         {
diff --git a/resources/js/bots/wallet/translations.js b/resources/js/bots/wallet/translations.js
index 13af3ac9eb..814f31aca0 100644
--- a/resources/js/bots/wallet/translations.js
+++ b/resources/js/bots/wallet/translations.js
@@ -22,6 +22,8 @@ I18n.translations = {
         request_requesting: 'Requesting ',
         request_requesting_from: 'from ',
 
+        validation_internal_title: 'Internal error',
+        validation_balance: 'Could not fetch current balance',
         validation_title: 'Amount',
         validation_tx_title: 'Transaction',
         validation_tx_failed: 'Transaction failed',