From 6ea5f14b39889aa78fd5f9637513518e02c9939c Mon Sep 17 00:00:00 2001
From: Odinson <bpoulav@gmail.com>
Date: Sat, 28 Jun 2025 09:25:39 +0530
Subject: [PATCH] feat: better error message for light_client/bootstrap
 endpoint (#7597)

Fixes #7229
---
 beacon_node/beacon_chain/src/light_client_server_cache.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/beacon_node/beacon_chain/src/light_client_server_cache.rs b/beacon_node/beacon_chain/src/light_client_server_cache.rs
index b7b6d1df18..3099c451c0 100644
--- a/beacon_node/beacon_chain/src/light_client_server_cache.rs
+++ b/beacon_node/beacon_chain/src/light_client_server_cache.rs
@@ -374,7 +374,7 @@ impl<T: BeaconChainTypes> LightClientServerCache<T> {
         let Some(current_sync_committee_branch) = store.get_sync_committee_branch(block_root)?
         else {
             return Err(BeaconChainError::LightClientBootstrapError(format!(
-                "Sync committee branch for block root {:?} not found",
+                "Sync committee branch for block root {:?} not found. This typically occurs when the block is not a finalized checkpoint. Light client bootstrap is only supported for finalized checkpoint block roots.",
                 block_root
             )));
         };