Can't subscript transactions

Author: SamWilsn

src/ethereum/cancun/exceptions.py

@@ -2,12 +2,15 @@
 Exceptions specific to this fork.
 """
 
-from typing import Final
+from typing import TYPE_CHECKING, Final
 
 from ethereum_types.numeric import Uint
 
 from ethereum.exceptions import InvalidTransaction
 
+if TYPE_CHECKING:
+    from .transactions import Transaction
+
 
 class TransactionTypeError(InvalidTransaction):
     """
@@ -28,20 +31,20 @@ def __init__(self, transaction_type: int):
 
 class TransactionTypeContractCreationError(InvalidTransaction):
     """
-    Transaction type is not allowed for contract creation.
+    Contract creation is not allowed for a transaction type.
     """
 
-    transaction_type: Final[int]
+    transaction: "Transaction"
     """
-    The type byte of the transaction that caused the error.
+    The transaction that caused the error.
     """
 
-    def __init__(self, transaction_type: int):
+    def __init__(self, transaction: "Transaction"):
         super().__init__(
-            f"transaction type `{transaction_type}` not allowed for "
-            "contract creation"
+            f"transaction type `{type(transaction).__name__}` not allowed to "
+            "create contracts"
         )
-        self.transaction_type = transaction_type
+        self.transaction = transaction
 
 
 class BlobGasLimitExceededError(InvalidTransaction):

src/ethereum/cancun/fork.py

@@ -451,7 +451,7 @@ def check_transaction(
 
     if isinstance(tx, BlobTransaction):
         if not isinstance(tx.to, Address):
-            raise TransactionTypeContractCreationError(tx[0])
+            raise TransactionTypeContractCreationError(tx)
         if len(tx.blob_versioned_hashes) == 0:
             raise NoBlobDataError("no blob data in transaction")
         for blob_versioned_hash in tx.blob_versioned_hashes:

src/ethereum/prague/exceptions.py

@@ -2,12 +2,15 @@
 Exceptions specific to this fork.
 """
 
-from typing import Final
+from typing import TYPE_CHECKING, Final
 
 from ethereum_types.numeric import Uint
 
 from ethereum.exceptions import InvalidTransaction
 
+if TYPE_CHECKING:
+    from .transactions import Transaction
+
 
 class TransactionTypeError(InvalidTransaction):
     """
@@ -28,20 +31,20 @@ def __init__(self, transaction_type: int):
 
 class TransactionTypeContractCreationError(InvalidTransaction):
     """
-    Transaction type is not allowed for contract creation.
+    Contract creation is not allowed for a transaction type.
     """
 
-    transaction_type: Final[int]
+    transaction: "Transaction"
     """
-    The type byte of the transaction that caused the error.
+    The transaction that caused the error.
     """
 
-    def __init__(self, transaction_type: int):
+    def __init__(self, transaction: "Transaction"):
         super().__init__(
-            f"transaction type `{transaction_type}` not allowed for "
-            "contract creation"
+            f"transaction type `{type(transaction).__name__}` not allowed to "
+            "create contracts"
         )
-        self.transaction_type = transaction_type
+        self.transaction = transaction
 
 
 class BlobGasLimitExceededError(InvalidTransaction):

src/ethereum/prague/fork.py

@@ -502,7 +502,7 @@ def check_transaction(
 
     if isinstance(tx, (BlobTransaction, SetCodeTransaction)):
         if not isinstance(tx.to, Address):
-            raise TransactionTypeContractCreationError(tx[0])
+            raise TransactionTypeContractCreationError(tx)
 
     if isinstance(tx, SetCodeTransaction):
         if not any(tx.authorizations):