From 376ee395f867466d207747f36c0064e069ea9d24 Mon Sep 17 00:00:00 2001
From: SomberNight <somber.night@protonmail.com>
Date: Tue, 8 Dec 2020 08:47:13 +0100
Subject: [PATCH] kivy: (fix) clicking "max" to send would raise for empty
 wallet

fix #6812
---
 electrum/gui/kivy/main_window.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/electrum/gui/kivy/main_window.py b/electrum/gui/kivy/main_window.py
index f42390496..7bb7ebb84 100644
--- a/electrum/gui/kivy/main_window.py
+++ b/electrum/gui/kivy/main_window.py
@@ -1110,7 +1110,8 @@ class ElectrumWindow(App, Logger):
         def cb(amount):
             if amount == '!':
                 screen.is_max = True
-                screen.amount = self.get_max_amount() + ' ' + self.base_unit
+                max_amt = self.get_max_amount()
+                screen.amount = (max_amt + ' ' + self.base_unit) if max_amt else ''
             else:
                 screen.amount = amount
                 screen.is_max = False