Compare the first versioned hash byte by indexing

ethereum · Apr 5, 2024 · fb28fa4 · fb28fa4
1 parent 7e68af4
commit fb28fa4
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diff --git a/eth/vm/forks/cancun/state.py b/eth/vm/forks/cancun/state.py
@@ -221,7 +221,7 @@ def validate_transaction(self, transaction: SignedTransactionAPI) -> None:
 
             # all versioned blob hashes must start with VERSIONED_HASH_VERSION_KZG
             for h in transaction.blob_versioned_hashes:
-                if h[0].to_bytes() != VERSIONED_HASH_VERSION_KZG:
+                if h[:1] != VERSIONED_HASH_VERSION_KZG:
                     raise ValidationError(
                         "Blob versioned hash does not start with expected "
                         f"KZG version: {VERSIONED_HASH_VERSION_KZG!r}"

diff --git a/newsfragments/2168.bugfix.rst b/newsfragments/2168.bugfix.rst
@@ -0,0 +1 @@
+``integer.to_bytes()`` requires size and byteorder below py311 and our fixture tests only use py311. Compare the first byte of versioned hashes by indexing instead.