From bcb06e5075f22bcf7e4c452943fbb0035ef69c78 Mon Sep 17 00:00:00 2001
From: Sander van Grieken <sander@outrightsolutions.nl>
Date: Thu, 16 Mar 2023 10:25:15 +0100
Subject: [PATCH] qml: set default minimum histogram if histogram empty

---
 electrum/gui/qml/qenetwork.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/electrum/gui/qml/qenetwork.py b/electrum/gui/qml/qenetwork.py
index 4caa44f07..3e13b6f72 100644
--- a/electrum/gui/qml/qenetwork.py
+++ b/electrum/gui/qml/qenetwork.py
@@ -89,11 +89,11 @@ class QENetwork(QObject, QtEventListener):
     @event_listener
     def on_event_fee_histogram(self, histogram):
         self._logger.debug(f'fee histogram updated: {repr(histogram)}')
-        if histogram is None:
-            histogram = []
         self.update_histogram(histogram)
 
     def update_histogram(self, histogram):
+        if not histogram:
+            histogram = [[FEERATE_DEFAULT_RELAY/1000,1]]
         # cap the histogram to a limited number of megabytes
         bytes_limit=10*1000*1000
         bytes_current = 0