From 328b5056f90601df2e1e2339e3bf94737e8c10eb Mon Sep 17 00:00:00 2001
From: Rongjian Lan <rongjian.lan@gmail.com>
Date: Wed, 30 Jan 2019 13:44:08 -0800
Subject: [PATCH] Add a comment to indicate new fields

---
 core/types/block.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/core/types/block.go b/core/types/block.go
index 354d39dd1..cab87feaa 100644
--- a/core/types/block.go
+++ b/core/types/block.go
@@ -91,6 +91,7 @@ type Header struct {
 	Extra            []byte         `json:"extraData"        gencodec:"required"`
 	MixDigest        common.Hash    `json:"mixHash"          gencodec:"required"`
 	Nonce            BlockNonce     `json:"nonce"            gencodec:"required"`
+	// Additional Fields
 	ShardID          ShardID        `json:"shardID"          gencodec:"required"`
 	PrepareSignature [48]byte       `json:"signature"        gencodec:"required"`
 	PrepareBitmap    []byte         `json:"bitmap"           gencodec:"required"` // Contains which validator signed