From 31f6b47b259aae3bedc22b6510c125ca6bf37be2 Mon Sep 17 00:00:00 2001
From: Haythem Sellami <17862704+haythemsellami@users.noreply.github.com>
Date: Fri, 13 Mar 2026 23:50:50 +0800
Subject: [PATCH] fix(monad): disable blob support on MONAD_EIGHT

---
 .../execution_testing/forks/forks/forks.py    | 74 +++++++++++++++++++
 .../forks/tests/test_forks.py                 | 13 ++++
 2 files changed, 87 insertions(+)

diff --git a/packages/testing/src/execution_testing/forks/forks/forks.py b/packages/testing/src/execution_testing/forks/forks/forks.py
index 8c3bec9a0fd..08f943304d1 100644
--- a/packages/testing/src/execution_testing/forks/forks/forks.py
+++ b/packages/testing/src/execution_testing/forks/forks/forks.py
@@ -3272,6 +3272,80 @@ 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
+    ) -> bool:
+        """MONAD_EIGHT does not support blob transactions."""
+        del block_number, timestamp
+        return False
+
+    @classmethod
+    def tx_types(
+        cls, *, block_number: int = 0, timestamp: int = 0
+    ) -> List[int]:
+        """Return Prague transaction types without blob transactions."""
+        return [
+            tx_type
+            for tx_type in super(MONAD_EIGHT, cls).tx_types(
+                block_number=block_number, timestamp=timestamp
+            )
+            if tx_type != 3
+        ]
+
+    @classmethod
+    def full_blob_tx_wrapper_version(
+        cls, *, block_number: int = 0, timestamp: int = 0
+    ) -> int | None:
+        """MONAD_EIGHT does not wrap full blob transactions."""
+        del block_number, timestamp
+        return None
+
+    @classmethod
+    def blob_schedule(
+        cls, *, block_number: int = 0, timestamp: int = 0
+    ) -> BlobSchedule | None:
+        """MONAD_EIGHT does not advertise a blob schedule."""
+        del block_number, timestamp
+        return None
+
+    @classmethod
+    def engine_get_blobs_version(
+        cls, *, block_number: int = 0, timestamp: int = 0
+    ) -> Optional[int]:
+        """MONAD_EIGHT does not expose blob retrieval over the engine API."""
+        del block_number, timestamp
+        return None
+
+    @classmethod
+    def engine_new_payload_blob_hashes(
+        cls, *, block_number: int = 0, timestamp: int = 0
+    ) -> bool:
+        """MONAD_EIGHT payloads do not include blob hashes."""
+        del block_number, timestamp
+        return False
+
     @classmethod
     def precompiles(
         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 5967b49e64b..8d6a564be28 100644
--- a/packages/testing/src/execution_testing/forks/tests/test_forks.py
+++ b/packages/testing/src/execution_testing/forks/tests/test_forks.py
@@ -19,6 +19,7 @@
     Homestead,
     Istanbul,
     London,
+    MONAD_EIGHT,
     Osaka,
     Paris,
     Prague,
@@ -395,6 +396,18 @@ 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."""
+    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.blob_schedule() is None
+    assert MONAD_EIGHT.engine_get_blobs_version() is None
+    assert MONAD_EIGHT.engine_new_payload_blob_hashes() is False
+    assert MONAD_EIGHT.full_blob_tx_wrapper_version() is None
+    assert 3 not in MONAD_EIGHT.tx_types()
+
+
 @pytest.mark.parametrize(
     "fork",
     [