From 00d199ed8500097ae5becd8a4f90d87c4651a6ab Mon Sep 17 00:00:00 2001
From: Roman Khimov <roman@nspcc.ru>
Date: Thu, 27 Feb 2020 11:57:31 +0300
Subject: [PATCH] core: fix NetworkFee calculation

Add doesn't change the variable state. Thanks to GolangCI for catching this.
---
 pkg/core/blockchain.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkg/core/blockchain.go b/pkg/core/blockchain.go
index 106149043..434a3886c 100644
--- a/pkg/core/blockchain.go
+++ b/pkg/core/blockchain.go
@@ -1053,14 +1053,14 @@ func (bc *Blockchain) NetworkFee(t *transaction.Transaction) util.Fixed8 {
 	}
 	for i := range refs {
 		if refs[i].Out.AssetID == UtilityTokenID() {
-			inputAmount.Add(refs[i].Out.Amount)
+			inputAmount = inputAmount.Add(refs[i].Out.Amount)
 		}
 	}
 
 	outputAmount := util.Fixed8FromInt64(0)
 	for _, txOutput := range t.Outputs {
 		if txOutput.AssetID == UtilityTokenID() {
-			outputAmount.Add(txOutput.Amount)
+			outputAmount = outputAmount.Add(txOutput.Amount)
 		}
 	}