def test_transaction_verify_transaction_signature_too_large_signature(self):
wallet = Wallet()
transaction = Transaction(wallet.pubkey, "CityU", 1)
transaction.add_signature("3379cc2f08e4cde5d24af02611c32693b18f406d4b58fbcd2bbd0acc67b1d")
verify = transaction.verify_transaction_signature()
self.assertFalse(verify)
def test_transaction_add_signature(self):
wallet = Wallet()
transaction = Transaction(wallet.pubkey, "CityU", 1)
signature = wallet.sign_transaction(transaction)
transaction.add_signature(signature)
self.assertTrue(hasattr(transaction, "signature"))
def test_transaction_verify_transaction_signature(self):
wallet = Wallet()
transaction = Transaction(wallet.pubkey, "CityU", 1)
signature = wallet.sign_transaction(transaction)
transaction.add_signature(signature)
verify = transaction.verify_transaction_signature()
self.assertTrue(verify)
def test_block_initialize(self):
wallet = Wallet()
transaction = Transaction(wallet.pubkey, "CityU", 1)
signature = wallet.sign_transaction(transaction)
transaction.add_signature(signature)
block = Block(0, [transaction], datetime.datetime.now().strftime("%m/%d/%Y, %H:%M:%S"), "0")
self.assertIsInstance(block, Block)
def test_blockchain_add_new_transaction_not_enough_balance(self):
wallet = Wallet()
blockchain = Blockchain(wallet)
transaction = Transaction(wallet.pubkey, "CityU", 100)
signature = wallet.sign_transaction(transaction)
transaction.add_signature(signature)
blockchain.add_new_transaction(transaction)
self.assertEqual(len(blockchain.unconfirmed_transactions), 0)
def test_block_compute_hash(self):
wallet = Wallet()
transaction = Transaction(wallet.pubkey, "CityU", 1)
signature = wallet.sign_transaction(transaction)
transaction.add_signature(signature)
block = Block(0, [transaction.to_json()], datetime.datetime.now().strftime("%m/%d/%Y, %H:%M:%S"), "0")
hash_val = block.compute_hash()
self.assertIsInstance(hash_val, str)
self.assertGreater(len(hash_val), 0)
def test_block_to_json(self):
wallet = Wallet()
transaction = Transaction(wallet.pubkey, "CityU", 1)
signature = wallet.sign_transaction(transaction)
transaction.add_signature(signature)
block = Block(0, [transaction.to_json()], datetime.datetime.now().strftime("%m/%d/%Y, %H:%M:%S"), "0")
content = block.to_json()
self.assertIsInstance(content, str)
self.assertGreater(len(content), 0)
def test_block_to_dict(self):
wallet = Wallet()
transaction = Transaction(wallet.pubkey, "CityU", 1)
signature = wallet.sign_transaction(transaction)
transaction.add_signature(signature)
block = Block(0, [transaction.to_json()], datetime.datetime.now().strftime("%m/%d/%Y, %H:%M:%S"), "0")
content = block.to_dict()
self.assertIsInstance(content, dict)
self.assertEqual(list(content.keys()), ["index", "timestamp", "previous_hash", "merkle_root", "nonce", "difficulty"])
def test_blockchain_add_block_wrong_previous_hash(self):
wallet = Wallet()
blockchain = Blockchain(wallet)
transaction = Transaction(wallet.pubkey, "CityU", 1)
signature = wallet.sign_transaction(transaction)
transaction.add_signature(signature)
block = Block(0, [transaction.to_json()], datetime.datetime.now().strftime("%m/%d/%Y, %H:%M:%S"), "Wrong")
computed_hash = blockchain.proof_of_work(block)
result = blockchain.add_block(block, computed_hash)
self.assertFalse(result)
def test_blockchain_proof_of_work_bad_block(self):
wallet = Wallet()
blockchain = Blockchain(wallet)
transaction = Transaction(wallet.pubkey, "CityU", 1)
signature = wallet.sign_transaction(transaction)
transaction.add_signature(signature)
previous_hash = blockchain.last_block["hash"]
block = Block(0, [transaction.to_json()], datetime.datetime.now().strftime("%m/%d/%Y, %H:%M:%S"), previous_hash)
delattr(block, "transaction")
self.assertRaises(AttributeError, blockchain.proof_of_work, block)
def test_blockchain_proof_of_work(self):
wallet = Wallet()
blockchain = Blockchain(wallet)
transaction = Transaction(wallet.pubkey, "CityU", 1)
signature = wallet.sign_transaction(transaction)
transaction.add_signature(signature)
previous_hash = blockchain.last_block["hash"]
block = Block(0, [transaction.to_json()], datetime.datetime.now().strftime("%m/%d/%Y, %H:%M:%S"), previous_hash)
computed_hash = blockchain.proof_of_work(block)
self.assertGreater(len(computed_hash), 0)
def new_transaction():
'''This API adds transactions to the transaction pool'''
values = request.form
required = ['recipient_address', 'value']
# Check that the required fields are in the POST data
if not all(k in values for k in required):
return 'Missing values', 400
transaction = Transaction(myWallet.pubkey, values['recipient_address'], values['value'])
transaction.add_signature(myWallet.sign_transaction(transaction))
transaction_result = blockchain.add_new_transaction(transaction)
if transaction_result:
response = {'message': 'Transaction will be added to Block'}
return jsonify(response), 201
else:
response = {'message': 'Invalid Transaction!'}
return jsonify(response), 406
