PR feedback

Author: lithp

eth/db/header.py

@@ -84,12 +84,12 @@ def get_canonical_head(self) -> BlockHeaderAPI:
     @classmethod
     def _get_canonical_head(cls, db: DatabaseAPI) -> BlockHeaderAPI:
         canonical_head_hash = cls._get_canonical_head_hash(db)
-        return cls._get_block_header_by_hash(db, Hash32(canonical_head_hash))
+        return cls._get_block_header_by_hash(db, canonical_head_hash)
 
     @classmethod
     def _get_canonical_head_hash(cls, db: DatabaseAPI) -> Hash32:
         try:
-            return cast(Hash32, db[SchemaV1.make_canonical_head_hash_lookup_key()])
+            return Hash32(db[SchemaV1.make_canonical_head_hash_lookup_key()])
         except KeyError:
             raise CanonicalHeadNotFound("No canonical head set for this chain")