From e0ac2918cc14aa5c401e4d70a7069e9fe0a47f71 Mon Sep 17 00:00:00 2001
From: Raul Jordan <rauljordan@college.harvard.edu>
Date: Wed, 16 May 2018 12:59:00 -0400
Subject: [PATCH] sharding: hashes collationHeaderData instead of the full
 header

Former-commit-id: 0cb0dcbd3241a34c34fd79cef2f8fec8e4ba0d5f [formerly 5e2f12a776dd956b1f98dc5a85b93a06ef22b581]
Former-commit-id: 7619acc6315efc4d71d0687b048d223a8cf4e3f7
---
 sharding/collation.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sharding/collation.go b/sharding/collation.go
index 245b1e8e0..5528453e4 100644
--- a/sharding/collation.go
+++ b/sharding/collation.go
@@ -56,10 +56,10 @@ func NewCollationHeader(shardID *big.Int, chunkRoot *common.Hash, period *big.In
 	return &CollationHeader{data}
 }
 
-// Hash takes the keccak256 of the collation header's contents.
+// Hash takes the keccak256 of the collation header's data contents.
 func (h *CollationHeader) Hash() (hash common.Hash) {
 	hw := sha3.NewKeccak256()
-	rlp.Encode(hw, h)
+	rlp.Encode(hw, h.data)
 	hw.Sum(hash[:0])
 	return hash
 }