From d8dad74267fe1bdcd98dce0d79e2196f7ced60dc Mon Sep 17 00:00:00 2001
From: SomberNight <somber.night@protonmail.com>
Date: Fri, 9 Feb 2018 00:16:11 +0100
Subject: [PATCH] fee calculation: force back-end to use integer sat/bytes

---
 lib/simple_config.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/simple_config.py b/lib/simple_config.py
index b7a41ddcc44b..c0bbb2162964 100644
--- a/lib/simple_config.py
+++ b/lib/simple_config.py
@@ -428,7 +428,12 @@ def estimate_fee(self, size):
 
     @classmethod
     def estimate_fee_for_feerate(cls, fee_per_kb, size):
-        return int(fee_per_kb * size / 1000.)
+        # note: We only allow integer sat/byte values atm.
+        # The GUI for simplicity reasons only displays integer sat/byte,
+        # and for the sake of consistency, we thus only use integer sat/byte in
+        # the backend too.
+        fee_per_byte = int(fee_per_kb / 1000)
+        return int(fee_per_byte * size)
 
     def update_fee_estimates(self, key, value):
         self.fee_estimates[key] = value