def validate_transaction(self,
transaction: BaseTransaction) -> BaseTransaction:
# Validate the transaction
transaction.validate()
self.vm_state.validate_transaction(transaction)
return transaction
def validate_transaction_signature(transaction: BaseTransaction) -> None:
if is_eip_155_signed_transaction(transaction):
v = extract_signature_v(transaction.v)
else:
v = transaction.v
canonical_v = v - 27
vrs = (canonical_v, transaction.r, transaction.s)
signature = keys.Signature(vrs=vrs)
message = transaction.get_message_for_signing()
try:
public_key = signature.recover_public_key_from_msg(message)
except BadSignature as e:
raise ValidationError("Bad Signature: {0}".format(str(e)))
if not signature.verify_msg(message, public_key):
raise ValidationError("Invalid Signature")
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)
