From b7095ba49c675d60321139d5e0f1b0add6f7600b Mon Sep 17 00:00:00 2001
From: Haythem Sellami <17862704+haythemsellami@users.noreply.github.com>
Date: Wed, 8 Apr 2026 10:25:11 +0700
Subject: [PATCH] fix(monad): keep blob header fields on MONAD_EIGHT

---
 .../execution_testing/forks/forks/forks.py    | 21 -------------------
 .../forks/tests/test_forks.py                 |  8 +++----
 2 files changed, 4 insertions(+), 25 deletions(-)

diff --git a/packages/testing/src/execution_testing/forks/forks/forks.py b/packages/testing/src/execution_testing/forks/forks/forks.py
index 5023e488d1..c5004faf86 100644
--- a/packages/testing/src/execution_testing/forks/forks/forks.py
+++ b/packages/testing/src/execution_testing/forks/forks/forks.py
@@ -3272,27 +3272,6 @@ def blob_base_cost(
 class MONAD_EIGHT(Prague, solc_name="cancun"):  # noqa: N801
     """MONAD_EIGHT fork."""
 
-    @classmethod
-    def header_excess_blob_gas_required(
-        cls, *, block_number: int = 0, timestamp: int = 0
-    ) -> bool:
-        """
-        MONAD_EIGHT does not include blob header fields.
-
-        Monad keeps the point-evaluation precompile but does not support blob
-        transactions or blob gas accounting.
-        """
-        del block_number, timestamp
-        return False
-
-    @classmethod
-    def header_blob_gas_used_required(
-        cls, *, block_number: int = 0, timestamp: int = 0
-    ) -> bool:
-        """MONAD_EIGHT does not include blob header fields."""
-        del block_number, timestamp
-        return False
-
     @classmethod
     def supports_blobs(
         cls, *, block_number: int = 0, timestamp: int = 0
diff --git a/packages/testing/src/execution_testing/forks/tests/test_forks.py b/packages/testing/src/execution_testing/forks/tests/test_forks.py
index 40d355c916..68d2295297 100644
--- a/packages/testing/src/execution_testing/forks/tests/test_forks.py
+++ b/packages/testing/src/execution_testing/forks/tests/test_forks.py
@@ -396,11 +396,11 @@ def test_tx_types() -> None:  # noqa: D103
     Cancun.tx_types() == list(range(4))  # noqa: B015
 
 
-def test_monad_eight_disables_blob_support() -> None:
-    """MONAD_EIGHT keeps the KZG precompile but does not support blob txs."""
+def test_monad_eight_disables_blob_transactions_not_headers() -> None:
+    """MONAD_EIGHT keeps blob header fields but rejects blob tx behavior."""
     assert MONAD_EIGHT.supports_blobs() is False
-    assert MONAD_EIGHT.header_excess_blob_gas_required() is False
-    assert MONAD_EIGHT.header_blob_gas_used_required() is False
+    assert MONAD_EIGHT.header_excess_blob_gas_required() is True
+    assert MONAD_EIGHT.header_blob_gas_used_required() is True
     assert MONAD_EIGHT.blob_schedule() is None
     assert MONAD_EIGHT.engine_get_blobs_version() is None
     assert MONAD_EIGHT.engine_new_payload_blob_hashes() is False