def extract_transaction_sender(transaction: SignedTransactionAPI) -> Address:
vrs = (transaction.y_parity, transaction.r, transaction.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 validate_transaction_signature(transaction: SignedTransactionAPI) -> None:
message = transaction.get_message_for_signing()
vrs = (transaction.y_parity, transaction.r, transaction.s)
try:
signature = keys.Signature(vrs=vrs)
public_key = signature.recover_public_key_from_msg(message)
except BadSignature as e:
raise ValidationError(f"Bad Signature: {str(e)}")
if not signature.verify_msg(message, public_key):
raise ValidationError("Invalid Signature")
