def extract_transaction_sender(transaction: BaseTransaction) -> Address:
if is_eip_155_signed_transaction(transaction):
if is_even(transaction.v):
v = 28
else:
v = 27
else:
v = transaction.v
r, s = transaction.r, transaction.s
canonical_v = v - 27
vrs = (canonical_v, r, s)
signature = keys.Signature(vrs=vrs)
message = transaction.get_message_for_signing()
public_key = signature.recover_public_key_from_msg(message)
sender = public_key.to_canonical_address()
return Address(sender)
def extract_signature_v(v: int) -> int:
if is_even(v):
return V_OFFSET + 1
else:
return V_OFFSET
def extract_chain_id(v: int) -> int:
if is_even(v):
return (v - EIP155_CHAIN_ID_OFFSET - 1) // 2
else:
return (v - EIP155_CHAIN_ID_OFFSET) // 2
def y_parity(self) -> int:
if is_eip_155_signed_transaction(self):
return int(is_even(self.v))
else:
return super().y_parity
