From e845e183af96e3a94f4c7ae4be6e8d23a8a2cabf Mon Sep 17 00:00:00 2001
From: Felix Lange <fjl@twurst.com>
Date: Tue, 4 Feb 2025 22:52:27 +0100
Subject: [PATCH] consensus/misc/eip4844: add parent header sanity check

---
 consensus/misc/eip4844/eip4844.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/consensus/misc/eip4844/eip4844.go b/consensus/misc/eip4844/eip4844.go
index 148ea60274..088aa2d1ef 100644
--- a/consensus/misc/eip4844/eip4844.go
+++ b/consensus/misc/eip4844/eip4844.go
@@ -34,6 +34,9 @@ var (
 // if the current block contains no transactions, the excessBlobGas is updated
 // accordingly.
 func VerifyEIP4844Header(config *params.ChainConfig, parent, header *types.Header) error {
+	if header.Number.Uint64() != parent.Number.Uint64()+1 {
+		panic("bad header pair")
+	}
 	// Verify the header is not malformed
 	if header.ExcessBlobGas == nil {
 		return errors.New("header is missing excessBlobGas")