From c615210fefdb10852ff950ab9163c100b37bd67e Mon Sep 17 00:00:00 2001
From: chonghe <44791194+chong-he@users.noreply.github.com>
Date: Thu, 9 Apr 2026 20:00:53 +0800
Subject: [PATCH] Truncated `Display` impl for `ExecutionBlockHash` (#9108)

- #6689


  The intention is to only modify the INFO logs that's emitted regularly to reduce the verbosity. But I understand that this change will affect other display in the logs too that uses the `ExecutionBlockHash` display. So would love some feedbacks about the change.


Co-Authored-By: Tan Chee Keong <tanck@sigmaprime.io>

Co-Authored-By: Mac L <mjladson@pm.me>
---
 beacon_node/client/src/notifier.rs             |  2 +-
 .../types/src/core/execution_block_hash.rs     | 18 ++++++++++++------
 2 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/beacon_node/client/src/notifier.rs b/beacon_node/client/src/notifier.rs
index c1d8cae573..4acb8c3aed 100644
--- a/beacon_node/client/src/notifier.rs
+++ b/beacon_node/client/src/notifier.rs
@@ -374,7 +374,7 @@ pub fn spawn_notifier<T: BeaconChainTypes>(
                         warn!(
                             info = "chain not fully verified, \
                             block and attestation production disabled until execution engine syncs",
-                        execution_block_hash = ?hash,
+                            execution_block_hash = ?hash,
                             "Head is optimistic"
                         );
                         format!("{} (unverified)", hash)
diff --git a/consensus/types/src/core/execution_block_hash.rs b/consensus/types/src/core/execution_block_hash.rs
index 91c019ce04..cbacf7cf74 100644
--- a/consensus/types/src/core/execution_block_hash.rs
+++ b/consensus/types/src/core/execution_block_hash.rs
@@ -18,6 +18,18 @@ impl fmt::Debug for ExecutionBlockHash {
     }
 }
 
+impl fmt::Display for ExecutionBlockHash {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let hash = format!("{}", self.0);
+        write!(
+            f,
+            "{}…{}",
+            &hash[..6],
+            &hash[hash.len().saturating_sub(4)..]
+        )
+    }
+}
+
 impl ExecutionBlockHash {
     pub fn zero() -> Self {
         Self(Hash256::zero())
@@ -102,12 +114,6 @@ impl std::str::FromStr for ExecutionBlockHash {
     }
 }
 
-impl fmt::Display for ExecutionBlockHash {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "{}", self.0)
-    }
-}
-
 impl From<Hash256> for ExecutionBlockHash {
     fn from(hash: Hash256) -> Self {
         Self(hash)