From c04157c9696ce7b9b12518f61ec638b872927c4b Mon Sep 17 00:00:00 2001
From: Nico Flaig <nflaig@protonmail.com>
Date: Tue, 8 Oct 2024 16:01:47 +0100
Subject: [PATCH] fix: ensure generated historical state slot matches requested
 slot (#7135)

---
 .../src/chain/historicalState/getHistoricalState.ts           | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/packages/beacon-node/src/chain/historicalState/getHistoricalState.ts b/packages/beacon-node/src/chain/historicalState/getHistoricalState.ts
index 1f352b3d683a..a9f254dea3f2 100644
--- a/packages/beacon-node/src/chain/historicalState/getHistoricalState.ts
+++ b/packages/beacon-node/src/chain/historicalState/getHistoricalState.ts
@@ -102,6 +102,10 @@ export async function getHistoricalState(
   metrics?.stateTransitionBlocks.observe(blockCount);
   transitionTimer?.();
 
+  if (state.slot !== slot) {
+    throw Error(`Failed to generate historical state for slot ${slot}`);
+  }
+
   const serializeTimer = metrics?.stateSerializationTime.startTimer();
   const stateBytes = state.serialize();
   serializeTimer?.();