feat: support EIP-7702 transactions (#94)

* feat: support EIP-7702 transactions

* chore: `black .`

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: BobTheBuidler

evmspec/__init__.py

@@ -40,6 +40,8 @@
     TransactionLegacy,
     Transaction1559,
     Transaction2930,
+    Transaction4844,
+    Transaction7702,
     Transaction,
     AnyTransaction,
 )
@@ -73,4 +75,6 @@
     "TransactionLegacy",
     "Transaction2930",
     "Transaction1559",
+    "Transaction4844",
+    "Transaction7702",
 ]

evmspec/structs/__init__.py

@@ -9,6 +9,8 @@
     TransactionLegacy,
     Transaction1559,
     Transaction2930,
+    Transaction4844,
+    Transaction7702,
 )
 
 __all__ = [
@@ -28,4 +30,6 @@
     "TransactionLegacy",
     "Transaction2930",
     "Transaction1559",
+    "Transaction4844",
+    "Transaction7702",
 ]

evmspec/structs/transaction.py

@@ -252,7 +252,20 @@ class Transaction4844(Transaction1559, tag="0x3", frozen=True, kw_only=True, for
     blobVersionedHashes: Tuple[HexBytes32, ...]
 
 
+@final
+class Transaction7702(Transaction1559, tag="0x4", frozen=True, kw_only=True, forbid_unknown_fields=True, omit_defaults=True, repr_omit_defaults=True):  # type: ignore [call-arg]
+    """
+    Represents a type-7702 (EIP-7702) Ethereum transaction to set an EOA's bytecode.
+    """
+
+    type: ClassVar[HexBytes] = HexBytes("4")
+
+
 Transaction = Union[
-    TransactionLegacy, Transaction2930, Transaction1559, Transaction4844
+    TransactionLegacy,
+    Transaction2930,
+    Transaction1559,
+    Transaction4844,
+    Transaction7702,
 ]
 AnyTransaction = Union[Transaction, TransactionRLP]