From 71dff2a06e3d462a2833d50002c32b2103dd0a7c Mon Sep 17 00:00:00 2001
From: SomberNight <somber.night@protonmail.com>
Date: Thu, 15 Mar 2018 14:17:27 +0100
Subject: [PATCH] fix #4128

---
 gui/qt/main_window.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/gui/qt/main_window.py b/gui/qt/main_window.py
index 53dabfb05..4741a1406 100644
--- a/gui/qt/main_window.py
+++ b/gui/qt/main_window.py
@@ -2308,7 +2308,11 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, PrintError):
             self.pay_to_URI(data)
             return
         # else if the user scanned an offline signed tx
-        data = bh2u(bitcoin.base_decode(data, length=None, base=43))
+        try:
+            data = bh2u(bitcoin.base_decode(data, length=None, base=43))
+        except BaseException as e:
+            self.show_error((_('Could not decode QR code')+':\n{}').format(e))
+            return
         tx = self.tx_from_text(data)
         if not tx:
             return