From 7e311e0ae1d1411788a97a3e0d99185519be6e9f Mon Sep 17 00:00:00 2001
From: operagxsasha <operagxsasha@gmail.com>
Date: Thu, 25 Jun 2026 11:06:15 +0000
Subject: [PATCH] fix: avoid panic when checkpoint API returns no slots

---
 ethereum/src/config/checkpoints.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/ethereum/src/config/checkpoints.rs b/ethereum/src/config/checkpoints.rs
index b593159f5..4616e193a 100644
--- a/ethereum/src/config/checkpoints.rs
+++ b/ethereum/src/config/checkpoints.rs
@@ -235,7 +235,12 @@ impl CheckpointFallback {
         let constructed_url = Self::construct_url(url);
         let res = get(&constructed_url).await?;
         let raw: RawSlotResponse = res.json().await?;
-        let slot = raw.data.slots[0].clone();
+        let slot = raw
+            .data
+            .slots
+            .first()
+            .ok_or_else(|| eyre::eyre!("no slots"))?
+            .clone();
         slot.block_root
             .ok_or_else(|| eyre::eyre!("Checkpoint not in returned slot"))
     }