From b122a67b23a0f457370e565b3ce14c9fd35807dd Mon Sep 17 00:00:00 2001
From: Felix Lange <fjl@twurst.com>
Date: Mon, 18 May 2026 22:55:12 +0200
Subject: [PATCH] eth/protocols/eth: fix empty response

---
 eth/protocols/eth/handlers.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/eth/protocols/eth/handlers.go b/eth/protocols/eth/handlers.go
index 4638b01e0d..4da4be59e7 100644
--- a/eth/protocols/eth/handlers.go
+++ b/eth/protocols/eth/handlers.go
@@ -687,7 +687,9 @@ func serviceGetBlockAccessListsQuery(chain *core.BlockChain, query GetBlockAcces
 		}
 		data := chain.GetAccessListRLP(hash)
 		if len(data) == 0 {
-			bals.AppendRaw([]byte{0xC0})
+			// The signal for missing BAL is the empty string, because
+			// an empty list is also a valid BAL.
+			bals.AppendRaw(rlp.EmptyString)
 			continue
 		}
 		bals.AppendRaw(data)