From 2a7e54d8bdfad9d05997660d5ad5ee81a4291821 Mon Sep 17 00:00:00 2001
From: Eitan Seri-Levi <eserilev@ucsc.edu>
Date: Tue, 30 May 2023 01:38:49 +0000
Subject: [PATCH] swap unnecessary  write lock to read lock in
 block_verification (#4340)

## Issue Addressed

[#4334](https://github.com/sigp/lighthouse/issues/4334)

## Proposed Changes

swap unnecessary write lock to read lock

## Additional Info

N/A


Co-authored-by: Michael Sproul <micsproul@gmail.com>
---
 beacon_node/beacon_chain/src/block_verification.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/beacon_node/beacon_chain/src/block_verification.rs b/beacon_node/beacon_chain/src/block_verification.rs
index ca4df864db..dba38af9bd 100644
--- a/beacon_node/beacon_chain/src/block_verification.rs
+++ b/beacon_node/beacon_chain/src/block_verification.rs
@@ -747,7 +747,7 @@ impl<T: BeaconChainTypes> GossipVerifiedBlock<T> {
         // We check this *before* we load the parent so that we can return a more detailed error.
         check_block_is_finalized_checkpoint_or_descendant(
             chain,
-            &chain.canonical_head.fork_choice_write_lock(),
+            &chain.canonical_head.fork_choice_read_lock(),
             &block,
         )?;