add misisng y parity check on SetCodeTransaction (#1270)

enitrat · web-flow · commit 3aabf4b9a1a8 · 2025-06-09T17:33:55.000+02:00
diff --git a/src/ethereum/prague/transactions.py b/src/ethereum/prague/transactions.py
@@ -376,6 +376,8 @@ def recover_sender(chain_id: U64, tx: Transaction) -> Address:
             r, s, tx.y_parity, signing_hash_4844(tx)
         )
     elif isinstance(tx, SetCodeTransaction):
+        if tx.y_parity not in (U256(0), U256(1)):
+            raise InvalidSignatureError("bad y_parity")
         public_key = secp256k1_recover(
             r, s, tx.y_parity, signing_hash_7702(tx)
         )

Original file line number	Diff line number	Diff line change
`@@ -376,6 +376,8 @@ def recover_sender(chain_id: U64, tx: Transaction) -> Address:`
`376`	`376`	`r, s, tx.y_parity, signing_hash_4844(tx)`
`377`	`377`	`)`
`378`	`378`	`elif isinstance(tx, SetCodeTransaction):`
	`379`	`+ if tx.y_parity not in (U256(0), U256(1)):`
	`380`	`+ raise InvalidSignatureError("bad y_parity")`
`379`	`381`	`public_key = secp256k1_recover(`
`380`	`382`	`r, s, tx.y_parity, signing_hash_7702(tx)`
`381`	`383`	`)`