def test_transaction_to_dict(self):
wallet = Wallet()
transaction = Transaction(wallet.pubkey, "CityU", 1)
content = transaction.to_dict()
self.assertIsInstance(content, dict)
self.assertEqual(list(content.keys()), ["sender", "recipient", "value", "fee"])
def sign_transaction(self, transaction: Transaction) -> str:
'''
method to return the signature that is coming from the actual owner in a transaction
implemented in the Wallet class instead of Transaction class to protect the private key from illegal access
'''
signer = PKCS1_v1_5.new(self._private_key)
payload = str(transaction.to_dict()).encode('utf-8')
h = SHA.new(payload)
return binascii.hexlify(signer.sign(h)).decode('ascii')
