From d4f6459108a06a2e4fc5b2870d9c2ee19463cf36 Mon Sep 17 00:00:00 2001
From: Diederik Loerakker <proto@protolambda.com>
Date: Thu, 3 Jun 2021 18:00:51 +0200
Subject: [PATCH] Define missing header_root

Co-authored-by: Anton Nashatyrev <Nashatyrev@users.noreply.github.com>
---
 specs/sharding/beacon-chain.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/specs/sharding/beacon-chain.md b/specs/sharding/beacon-chain.md
index 7c9c6295d..9a0117fb4 100644
--- a/specs/sharding/beacon-chain.md
+++ b/specs/sharding/beacon-chain.md
@@ -608,6 +608,7 @@ def process_shard_header(state: BeaconState, signed_header: SignedShardBlobHeade
 
     # Check that this header is not yet in the pending list
     current_headers: Sequence[PendingShardHeader] = committee_work.status.value
+    header_root = hash_tree_root(header)
     assert header_root not in [pending_header.root for pending_header in current_headers]
 
     # Verify proposer