From 8c02c6b22cac5d5b95a354fa249b9cf70f109ecc Mon Sep 17 00:00:00 2001
From: Roman Khimov <roman@nspcc.ru>
Date: Thu, 23 Apr 2020 16:26:37 +0300
Subject: [PATCH] native: put proper Null StackItem for transfer event

nil is not a good StackItem, we have proper VM-level Null for this.
---
 pkg/core/native/native_nep5.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkg/core/native/native_nep5.go b/pkg/core/native/native_nep5.go
index 676437369..bb4cf8e87 100644
--- a/pkg/core/native/native_nep5.go
+++ b/pkg/core/native/native_nep5.go
@@ -113,7 +113,7 @@ func (c *nep5TokenNative) Transfer(ic *interop.Context, args []vm.StackItem) vm.
 
 func addrToStackItem(u *util.Uint160) vm.StackItem {
 	if u == nil {
-		return nil
+		return vm.NullItem{}
 	}
 	return vm.NewByteArrayItem(u.BytesBE())
 }