From e02fcb30ab9e2a71df3a4d5292321711314d4393 Mon Sep 17 00:00:00 2001
From: realbigsean <sean@sigmaprime.io>
Date: Tue, 3 Jan 2023 17:23:01 -0500
Subject: [PATCH] dont verify the signature of the genesis block in backfill
 sync (#3846)

---
 .../beacon_chain/src/historical_blocks.rs     | 24 +++++++++++--------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/beacon_node/beacon_chain/src/historical_blocks.rs b/beacon_node/beacon_chain/src/historical_blocks.rs
index cc45a6bb9..85a9ec8fb 100644
--- a/beacon_node/beacon_chain/src/historical_blocks.rs
+++ b/beacon_node/beacon_chain/src/historical_blocks.rs
@@ -153,16 +153,20 @@ impl<T: BeaconChainTypes> BeaconChain<T> {
         let signature_set = blocks_to_import
             .iter()
             .zip_eq(block_roots)
-            .map(|(block, block_root)| {
-                block_proposal_signature_set_from_parts(
-                    block,
-                    Some(block_root),
-                    block.message().proposer_index(),
-                    &self.spec.fork_at_epoch(block.message().epoch()),
-                    self.genesis_validators_root,
-                    |validator_index| pubkey_cache.get(validator_index).cloned().map(Cow::Owned),
-                    &self.spec,
-                )
+            .filter_map(|(block, block_root)| {
+                (block_root != self.genesis_block_root).then(|| {
+                    block_proposal_signature_set_from_parts(
+                        block,
+                        Some(block_root),
+                        block.message().proposer_index(),
+                        &self.spec.fork_at_epoch(block.message().epoch()),
+                        self.genesis_validators_root,
+                        |validator_index| {
+                            pubkey_cache.get(validator_index).cloned().map(Cow::Owned)
+                        },
+                        &self.spec,
+                    )
+                })
             })
             .collect::<Result<Vec<_>, _>>()
             .map_err(HistoricalBlockError::SignatureSet)