def get_blockchain_from_db(self):
"""Fetch all blocks with their transactions from database
Returns
-------
List of all blocks
"""
self.open_connection(self.db_file)
get_block = "SELECT * from {}".format(self.blockchain_table)
get_transactions = "SELECT * FROM {} WHERE block_hash = ?".format(self.transaction_table)
self.cursor.execute(get_block)
blocks = []
blocks_db = self.cursor.fetchall()
if len(blocks_db) == 0:
return None
for block_db in blocks_db:
self.cursor.execute(get_transactions, (block_db[0],))
txns = []
txns_db = self.cursor.fetchall()
if len(txns_db) != 0:
for txn_db in txns_db:
txn = Transaction(txn_db[0], txn_db[1], txn_db[2], txn_db[3])
txn.transaction_hash = txn_db[4]
txns.append(txn)
#txns=[]
block = Block(block_id=block_db[1], merkle_tree_root=block_db[2],
predecessor_hash=block_db[3], block_creator_id=block_db[4],
transactions=txns, nonce=block_db[5], timestamp=float(block_db[6]),
difficulty=int(block_db[7]))
blocks.append(block)
self.conn.close()
return blocks
def test_set_signature(self):
"""Test for signature setting"""
transaction = Transaction(sender="s", receiver="r", payload="1")
self.assertTrue(isinstance(transaction, Transaction))
transaction.signature = "sig"
self.assertEqual("r", transaction.receiver)
self.assertEqual("sig", transaction.signature)
self.assertEqual("1", transaction.payload)
self.assertEqual("s", transaction.sender)
try:
transaction.signature = "sg"
self.assertFalse(True)
except ValueError:
self.assertTrue(True)
def test_request_blocks_by_hash_range(self):
"""Test case #13."""
# given
self.available_blocks[2] = Block(
2,
'test_merkle_hash',
'test_pred_block_hash',
'test_creator', [
Transaction('test_sender', 'test_receiver', 'test_payload',
'test_signature')
],
nonce=5,
timestamp=1337.0)
# when
json_rpc_request = {
"jsonrpc": "2.0",
"method": "requestBlocksByHashRange",
"params": [],
"id": 1
}
response = self.make_request(json.dumps(json_rpc_request))
# then
self.assert_json_equal(
response,
'{ "jsonrpc": "2.0", "result": [{"nr": 2, "timestamp": 1337.0, '
'"merkleHash" : "test_merkle_hash", '
'"difficulty" : -1,'
'"predecessorBlock" : "test_pred_block_hash", "nonce" : 5, '
'"creator" : "test_creator", "transactions" : '
'[{"sender": "test_sender", "receiver": "test_receiver", '
'"payload": "test_payload", "signature": "test_signature"}]}], "id":1}'
)
def test_from_dict(self):
"""Test transaction creation from dict"""
d = {'sender': 's', 'receiver': 'r', 'payload': '1', 'signature': 'sig'}
transaction = Transaction.from_dict(d)
self.assertTrue(isinstance(transaction, Transaction))
self.assertEqual("r", transaction.receiver)
self.assertEqual("sig", transaction.signature)
self.assertEqual("1", transaction.payload)
self.assertEqual("s", transaction.sender)
def test_from_json(self):
"""Test transaction creation from json"""
json_string = '{"receiver": "r", "signature": "sig", "payload": "1", "sender": "s"}'
transaction = Transaction.from_json(json_string)
self.assertTrue(isinstance(transaction, Transaction))
self.assertEqual("r", transaction.receiver)
self.assertEqual("sig", transaction.signature)
self.assertEqual("1", transaction.payload)
self.assertEqual("s", transaction.sender)
def from_dict(data_dict):
"""Instantiate a Block from a data dictionary."""
return Block(block_id=data_dict['nr'],
merkle_tree_root=data_dict['merkleHash'],
predecessor_hash=data_dict['predecessorBlock'],
block_creator_id=data_dict['creator'],
transactions=[
Transaction.from_dict(transaction_dict)
for transaction_dict in data_dict['transactions']
],
nonce=data_dict['nonce'],
timestamp=data_dict['timestamp'],
difficulty=data_dict['difficulty'])
def requestTransaction(self, transaction_hash):
"""Returns the tuple (transaction, block hash of transaction)."""
responses = self._bulk_send('requestTransaction', [transaction_hash],
return_on_first_success=True)
if responses:
if responses[0]:
transaction, block_hash = responses[0]
return Transaction.from_dict(transaction), block_hash
else:
raise TransactionDoesNotExistException()
else:
raise NoPeersException(
'No nodes available to request the transaction from')
def from_dict(data_dict, consesnus_obj=None):
"""Instantiate a LogicalBlock from a data dictionary."""
_transactions = []
if data_dict['transactions']:
_transactions = data_dict['transactions']
return LogicalBlock(block_id=data_dict['nr'],
merkle_tree_root=data_dict['merkleHash'],
predecessor_hash=data_dict['predecessorBlock'],
block_creator_id=data_dict['creator'],
transactions=[
Transaction.from_dict(transaction_dict)
for transaction_dict in _transactions
],
nonce=data_dict['nonce'],
difficulty=data_dict['difficulty'],
timestamp=data_dict['timestamp'],
consensus_obj=consesnus_obj)
def __handle_send_transaction(self, transaction_data):
transaction = Transaction.from_dict(transaction_data)
transaction_hash = self.crypto_helper.hash(transaction.get_json())
transaction_in_pool, _ = self.get_transaction_callback(
transaction_hash)
self.on_transaction_received_callback(transaction)
if not self.get_transaction_callback(transaction_hash)[0]:
# if transaction still not present, it must have been delined
self.__add_transaction_to_cache(transaction)
if not transaction_in_pool == transaction and not self.__transaction_in_cache(
transaction):
logger.debug('Broadcasting transaction: {}'.format(
str(transaction)))
logger.debug('Broadcasting transaction hash: ' +
str(transaction_hash))
try:
self._call_threaded(self.sendTransaction, [transaction])
except NoPeersException:
pass
def test_send_block_client_valid(self):
"""Test Case #8"""
# Given
self.add_peer('192.168.100.4', 6666)
now = time.time()
test_block = Block(2, 'merkle_hash123', 'pre_hash123', 'test_creator',
[
Transaction('test_sender', 'test_receiver',
'test_payload', 'test_signature')
], 6969, now)
# when
self.json_rpc_client.queue_response({
'jsonrpc': '2.0',
'result': None,
'id': 1
})
self.network_interface.sendBlock(test_block)
# then
last_request_method, last_request_params = self.get_last_request(
'192.168.100.4', 6666)
self.assertEqual(last_request_method, 'sendBlock')
self.assert_json_equal(last_request_params, [{
'nr':
2,
'timestamp':
now,
'merkleHash':
'merkle_hash123',
'predecessorBlock':
'pre_hash123',
'nonce':
6969,
'creator':
'test_creator',
'difficulty':
-1,
'transactions': [{
'sender': 'test_sender',
'receiver': 'test_receiver',
'payload': 'test_payload',
'signature': 'test_signature'
}]
}])
def test_show_transaction_with_existing_transaction(self):
""" Test case: #11
Tested requirement: #200
"""
# given
transaction = Transaction('some_sender_id', 'some_receiver_id',
'some_payload', 'some_signature')
self.add_transaction(transaction)
transaction_hash = self.mock_crypto_helper.hash_transaction(
transaction)
# when
self.queue_input('4')
self.queue_input(transaction_hash)
self.queue_input('')
self.queue_input('5')
self.client.main()
# then
self.assert_string_in_output('some_sender_id')
self.assert_string_in_output('some_receiver_id')
self.assert_string_in_output('some_sender_id')
self.assert_string_in_output('some_payload')
def test_request_transaction(self):
"""test case #9 """
# given
self.add_peer('192.168.100.4', 6666)
self.available_transactions['hash_of_transaction_#1'] = Transaction(
"test_sender", "test_receiver", "test_payload", "test_signature")
# when
json_rpc_request = {
"jsonrpc": "2.0",
"method": "requestTransaction",
"params": ["hash_of_transaction_#1"],
"id": 1
}
response = self.make_request(json.dumps(json_rpc_request))
# then
self.assert_json_equal(
response,
'{"result": [{"sender": "test_sender", "receiver": "test_receiver", '
'"payload": "test_payload", "signature": "test_signature"}, "test_block_hash"], "id": 1,"jsonrpc": "2.0"}'
)
def test_request_block_from_nonempty_blockchain(self):
""" Test case: #10
Tested requirement: #210
"""
# given
transactions = []
for i in range(5):
transactions.append(
Transaction("test_sender", "test_receiver", "payload_data"))
block0 = Block(0, "merkle_tree_hash_qthq4thi4q4t", 'pred_hash_1',
"creator_hash", transactions, 123)
block1 = Block(
1,
"merkle_tree_hash_qthq5thi4q1t",
'pred_hash_2',
"creator_hash",
transactions,
456,
)
self.add_block(block0)
self.add_block(block1)
# when
self.queue_input('3')
self.queue_input('1')
self.queue_input('1')
self.queue_input('') # press enter
self.queue_input('3')
self.queue_input('5')
self.client.main()
# then
self.assert_string_in_output('1') # block number
self.assert_string_in_output(
'merkle_tree_hash_qthq5thi4q1t') # merkle tree root
self.assert_string_in_output('pred_hash_2') # predecessor hash
self.assert_string_in_output('456') # nonce
self.assert_string_in_output('creator_hash') # block creator
def create_transactions(self):
pr_key1, pub_key1 = self.crypto_helper_obj.generate_key_pair()
pr_key2, pub_key2 = self.crypto_helper_obj.generate_key_pair()
pr_key3, pub_key3 = self.crypto_helper_obj.generate_key_pair()
pr_key4, pub_key4 = self.crypto_helper_obj.generate_key_pair()
self.txn1 = Transaction(pub_key1, pub_key2, "Payload1")
self.txn2 = Transaction(pub_key2, pub_key4, "Payload2")
self.txn3 = Transaction(pub_key3, pub_key1, "Payload3")
self.txn4 = Transaction(pub_key4, pub_key3, "Payload3")
self.txn1.sign_transaction(self.crypto_helper_obj, pr_key1)
self.txn2.sign_transaction(self.crypto_helper_obj, pr_key2)
self.txn3.sign_transaction(self.crypto_helper_obj, pr_key3)
self.txn4.sign_transaction(self.crypto_helper_obj, pr_key4)
self.txn1.transaction_hash = self.crypto_helper_obj.hash(
self.txn1.get_json())
self.txn2.transaction_hash = self.crypto_helper_obj.hash(
self.txn2.get_json())
self.txn3.transaction_hash = self.crypto_helper_obj.hash(
self.txn3.get_json())
self.txn4.transaction_hash = self.crypto_helper_obj.hash(
self.txn4.get_json())
def test_send_transaction_client_valid(self):
"""Test Case #6"""
# given
self.add_peer('192.168.2.3', 6666)
test_transaction = Transaction('test_sender', 'test_receiver',
'test_payload', 'test_signature')
# when
self.json_rpc_client.queue_response({
'jsonrpc': '2.0',
'result': True,
'id': 1
})
self.network_interface.sendTransaction(test_transaction)
# then
last_request_method, last_request_params = self.get_last_request(
'192.168.2.3', 6666)
self.assertEqual(last_request_method, 'sendTransaction')
self.assertEqual(last_request_params, [{
"sender": "test_sender",
"receiver": "test_receiver",
"payload": "test_payload",
"signature": "test_signature"
}])
from labchain.datastructure.transaction import Transaction
from tests.test_account import MockCryptoHelper
from labchain.network.networking import ServerNetworkInterface, JsonRpcClient
project_dir = os.path.abspath(os.path.join(os.path.dirname(__file__), os.pardir, os.pardir))
if project_dir not in sys.path:
sys.path.append(project_dir)
# change to DEBUG to see more output
LOG_LEVEL = logging.INFO
# change the polling interval
POLL_INTERVAL = 10
BLOCK = Block(1, 'some_root', 'pred_hash', 'creator_id',
[Transaction('some sender', 'some_receiver', 'some_payload', 'some_signature')],
1234)
RECEIVED_BLOCKS = {}
def get_block(block_id):
if block_id in RECEIVED_BLOCKS:
return [RECEIVED_BLOCKS[block_id]]
return []
def on_block_received(received_block):
RECEIVED_BLOCKS[received_block.block_id] = received_block
logging.warning('Received block: {}'.format(received_block))
def show(self):
"""Start the wizard."""
clear_screen()
# convert dict to an ordered list
# this needs to be done to get an ordered list that does not change
# at runtime of the function
wallet_list = self.__wallet_to_list()
# check if wallet contains any keys
# case: wallet not empty
if not len(self.wallet) == 0:
chosen_key = self.__ask_for_key_from_wallet(wallet_list)
if chosen_key == '':
return
# ask for valid sender input in a loop
while not self.__validate_sender_input(chosen_key):
chosen_key = self.__ask_for_key_from_wallet(wallet_list)
if chosen_key == '':
return
clear_screen()
print('Invalid input! Please choose a correct index!')
print()
clear_screen()
print(u'Sender: ' + str(chosen_key))
chosen_receiver = self.__ask_for_receiver()
while not self.__validate_receiver_input(chosen_receiver):
# clear_screen()
print('Invalid input! Please choose a correct receiver!')
print(u'Sender: ' + str(chosen_key))
chosen_receiver = self.__ask_for_receiver()
print()
clear_screen()
print(u'Sender: ' + str(chosen_key))
print(u'Receiver: ' + str(chosen_receiver))
chosen_payload = self.__ask_for_payload()
while not self.__validate_payload_input(chosen_payload):
# clear_screen()
print('Invalid input! Please choose a correct payload!')
print(u'Sender: ' + str(chosen_key))
print(u'Receiver: ' + str(chosen_receiver))
chosen_payload = self.__ask_for_payload()
print()
clear_screen()
# Create transaction Object and send to network
private_key = wallet_list[int(chosen_key) - 1][2]
public_key = wallet_list[int(chosen_key) - 1][1]
new_transaction = Transaction(str(public_key), str(chosen_receiver), str(chosen_payload))
new_transaction.sign_transaction(self.crypto_helper, private_key)
transaction_hash = self.crypto_helper.hash(new_transaction.get_json())
self.network_interface.sendTransaction(new_transaction)
print('Transaction successfully created!')
print()
print(u'Sender: ' + public_key)
print(u'Receiver: ' + str(chosen_receiver))
print(u'Payload: ' + str(chosen_payload))
print(u'Hash: ' + str(transaction_hash))
print()
# case: wallet is empty
else:
print(u'Wallet does not contain any keys! Please create one first!')
input('Press any key to go back to the main menu!')
class DbTestCase(unittest.TestCase):
def setUp(self):
self.database = Db(block_chain_db_file=os.path.abspath(
os.path.join(os.path.dirname(__file__),
'../labchain/resources/labchaindb.sqlite')))
self.init_components()
self.create_transactions()
self.create_blocks()
def test_create_tables(self):
self.assertTrue(self.database.create_tables())
def test_save_block(self):
self.assertTrue(self.database.save_block(self.block1))
self.database.get_blockchain_from_db()
def init_components(self):
node_config = './labchain/resources/node_configuration.ini'
config_reader = ConfigReader(node_config)
tolerance = config_reader.get_config(section='BLOCK_CHAIN',
option='TOLERANCE_LEVEL')
pruning = config_reader.get_config(section='BLOCK_CHAIN',
option='TIME_TO_PRUNE')
min_blocks = config_reader.get_config(
section='MINING', option='NUM_OF_BLOCKS_FOR_DIFFICULTY')
self.consensus = Consensus()
self.crypto_helper_obj = crypto.instance()
self.txpool = TxPool(self.crypto_helper_obj)
self.block_list = []
self.blockchain = BlockChain(node_id="nodeId1",
tolerance_value=tolerance,
pruning_interval=pruning,
consensus_obj=self.consensus,
txpool_obj=self.txpool,
crypto_helper_obj=self.crypto_helper_obj,
min_blocks_for_difficulty=min_blocks,
db=self.database,
q=None)
def create_transactions(self):
pr_key1, pub_key1 = self.crypto_helper_obj.generate_key_pair()
pr_key2, pub_key2 = self.crypto_helper_obj.generate_key_pair()
pr_key3, pub_key3 = self.crypto_helper_obj.generate_key_pair()
pr_key4, pub_key4 = self.crypto_helper_obj.generate_key_pair()
self.txn1 = Transaction(pub_key1, pub_key2, "Payload1")
self.txn2 = Transaction(pub_key2, pub_key4, "Payload2")
self.txn3 = Transaction(pub_key3, pub_key1, "Payload3")
self.txn4 = Transaction(pub_key4, pub_key3, "Payload3")
self.txn1.sign_transaction(self.crypto_helper_obj, pr_key1)
self.txn2.sign_transaction(self.crypto_helper_obj, pr_key2)
self.txn3.sign_transaction(self.crypto_helper_obj, pr_key3)
self.txn4.sign_transaction(self.crypto_helper_obj, pr_key4)
self.txn1.transaction_hash = self.crypto_helper_obj.hash(
self.txn1.get_json())
self.txn2.transaction_hash = self.crypto_helper_obj.hash(
self.txn2.get_json())
self.txn3.transaction_hash = self.crypto_helper_obj.hash(
self.txn3.get_json())
self.txn4.transaction_hash = self.crypto_helper_obj.hash(
self.txn4.get_json())
def create_blocks(self):
self.block1 = self.blockchain.create_block([self.txn1, self.txn2])
self.block2 = self.blockchain.create_block([self.txn3, self.txn4])
self.block3 = self.blockchain.create_block([self.txn1, self.txn4])
self.block4 = self.blockchain.create_block([self.txn1, self.txn3])
self.block5 = self.blockchain.create_block([self.txn1, self.txn2])
self.block6 = self.blockchain.create_block([self.txn3, self.txn4])
self.block7 = self.blockchain.create_block([self.txn2, self.txn4])
from labchain.network import networking
from labchain.datastructure.transaction import Transaction
from tests.test_account import MockCryptoHelper
from labchain.network.networking import ServerNetworkInterface, JsonRpcClient
project_dir = os.path.abspath(
os.path.join(os.path.dirname(__file__), os.pardir, os.pardir))
if project_dir not in sys.path:
sys.path.append(project_dir)
# change to DEBUG to see more output
LOG_LEVEL = logging.INFO
# change the polling interval
POLL_INTERVAL = 10
TRANSACTION = Transaction('some sender', 'some_receiver', 'some_payload',
'some_signature')
RECEIVED_TRANSACTIONS = {}
def get_transaction(transaction_hash):
if transaction_hash in RECEIVED_TRANSACTIONS:
return RECEIVED_TRANSACTIONS[transaction_hash], 'fake_block_hash'
return None, None
def on_transaction_received(received_transaction):
transaction_hash = hashlib.sha256(received_transaction.get_json().encode())
RECEIVED_TRANSACTIONS[transaction_hash] = received_transaction
logging.warning('Received transaction: {}'.format(received_transaction))
class BlockChainComponent(unittest.TestCase):
"""Class of testcases for the Blockchain module"""
def setUp(self):
"""Setup phase for each testcase"""
self.init_components()
self.create_transactions()
self.create_blocks()
def test_get_block_range(self):
# get_block_range doesn't consider genesis block so expected length = 0
blocks = self.blockchain.get_block_range(0)
self.assertEqual(len(blocks), 0)
def test_get_block_by_id(self):
# fetching first block whose id = 0
blocks = self.blockchain.get_block_by_id(0)
for block in blocks:
self.assertEqual(block._block_id, 0)
def test_get_block_by_hash(self):
block_info = json.loads(
self.blockchain.get_block_by_hash(
self.blockchain._first_block_hash))
self.assertEqual(block_info['nr'], 0)
def test_add_block(self):
self.blockchain.add_block(self.block1)
#blocks = self.blockchain.get_block_range(0)
#self.assertEqual(len(blocks), 1)
"""
def test_add_block1(self):
# now block8 has a branch with block 6
self.block8 = self.block1 = self.blockchain.create_block([self.txn2, self.txn4])
self.assertFalse(self.blockchain.add_block(self.block8), "Block is deleted")
# block 9 has a normal predecessor block 7
self.block9 = self.block1 = self.blockchain.create_block([self.txn2, self.txn4])
self.assertTrue(self.blockchain.add_block(self.block9), "Block is saved")
"""
def test_switch_to_longest_branch(self):
# now block8 has a branch with block 6
self.block8 = self.block1 = self.blockchain.create_block(
[self.txn2, self.txn4])
# we are trying to add a new block in the block chain
self.blockchain._blockchain[self.crypto_helper_obj.hash(
self.block8.get_json())] = self.block8
# calculating the length of the blockchain before adding new block
prev_block_length = len(self.blockchain._blockchain.items())
# calling the switching branch method
self.blockchain.switch_to_longest_branch()
# calculating the length of the blockchain after adding new block
after_block_length = len(self.blockchain._blockchain.items())
# after branch switching the length of the block should be same
self.assertEqual(prev_block_length, after_block_length,
"Block is deleted")
def test_calculate_diff(self):
# blocks added in setup
blocks, t1, t2, diff = self.blockchain.calculate_diff()
self.assertIsNotNone(blocks)
self.assertIsNotNone(t1)
self.assertIsNotNone(t2)
self.assertIsNotNone(diff)
def test_create_block(self):
# creating new block based on given transaction list
new_block = self.blockchain.create_block([self.txn2, self.txn4])
self.assertIsNotNone(new_block, "New block Created")
"""
def test_send_block_to_neighbour(self):
block_as_json = self.blockchain.send_block_to_neighbour(self.block1)
block_as_object = Block.from_json(block_as_json)
self.assertIsInstance(block_as_object, Block, "Sent the Block information requested by any neighbour")
"""
def request_block_from_neighbour(self):
self.assertEqual(1, 2 - 1, "They are equal")
def init_components(self):
node_config = './labchain/resources/node_configuration.ini'
config_reader = ConfigReader(node_config)
tolerance = config_reader.get_config(section='BLOCK_CHAIN',
option='TOLERANCE_LEVEL')
pruning = config_reader.get_config(section='BLOCK_CHAIN',
option='TIME_TO_PRUNE')
min_blocks = config_reader.get_config(
section='MINING', option='NUM_OF_BLOCKS_FOR_DIFFICULTY')
self.consensus = Consensus()
self.crypto_helper_obj = crypto.instance()
self.txpool = TxPool(self.crypto_helper_obj)
self.block_list = []
self.blockchain = BlockChain(node_id="nodeId1",
tolerance_value=tolerance,
pruning_interval=pruning,
consensus_obj=self.consensus,
txpool_obj=self.txpool,
crypto_helper_obj=self.crypto_helper_obj,
min_blocks_for_difficulty=min_blocks,
db=None,
q=None)
def create_transactions(self):
pr_key1, pub_key1 = self.crypto_helper_obj.generate_key_pair()
pr_key2, pub_key2 = self.crypto_helper_obj.generate_key_pair()
pr_key3, pub_key3 = self.crypto_helper_obj.generate_key_pair()
pr_key4, pub_key4 = self.crypto_helper_obj.generate_key_pair()
self.txn1 = Transaction(pub_key1, pub_key2, "Payload1")
self.txn2 = Transaction(pub_key2, pub_key4, "Payload2")
self.txn3 = Transaction(pub_key3, pub_key1, "Payload3")
self.txn4 = Transaction(pub_key4, pub_key3, "Payload3")
self.txn1.sign_transaction(self.crypto_helper_obj, pr_key1)
self.txn2.sign_transaction(self.crypto_helper_obj, pr_key2)
self.txn3.sign_transaction(self.crypto_helper_obj, pr_key3)
self.txn4.sign_transaction(self.crypto_helper_obj, pr_key4)
self.txn1.transaction_hash = self.crypto_helper_obj.hash(
self.txn1.get_json())
self.txn2.transaction_hash = self.crypto_helper_obj.hash(
self.txn2.get_json())
self.txn3.transaction_hash = self.crypto_helper_obj.hash(
self.txn3.get_json())
self.txn4.transaction_hash = self.crypto_helper_obj.hash(
self.txn4.get_json())
def create_blocks(self):
self.block1 = self.blockchain.create_block([self.txn1, self.txn2])
self.block2 = self.blockchain.create_block([self.txn3, self.txn4])
self.block3 = self.blockchain.create_block([self.txn1, self.txn4])
self.block4 = self.blockchain.create_block([self.txn1, self.txn3])
self.block5 = self.blockchain.create_block([self.txn1, self.txn2])
self.block6 = self.blockchain.create_block([self.txn3, self.txn4])
self.block7 = self.blockchain.create_block([self.txn2, self.txn4])
