def test_generate_key_pair(self):
private_value_base58, public_value_compressed_base58 = generate_key_pair(
)
assert PrivateKey.encode(
PrivateKey.decode(private_value_base58)) == private_value_base58
assert PublicKey.encode(*PublicKey.decode(
public_value_compressed_base58)) == public_value_compressed_base58
def test_valid_block_voting(self, b):
# create queue and voter
q_new_block = mp.Queue()
voter = Voter(q_new_block)
genesis = b.create_genesis_block()
# create valid block
block = b.create_block([])
# assert block is valid
assert b.is_valid_block(block)
b.write_block(block, durability='hard')
# insert into queue
# FIXME: we disable this because the voter can currently vote more than one time for a block
# q_new_block.put(block)
# vote
voter.start()
# wait for vote to be written
time.sleep(1)
voter.kill()
# retrive block from bigchain
bigchain_block = r.table('bigchain').get(block['id']).run(b.conn)
# validate vote
assert len(bigchain_block['votes']) == 1
vote = bigchain_block['votes'][0]
assert vote['vote']['voting_for_block'] == block['id']
assert vote['vote']['previous_block'] == genesis['id']
assert vote['vote']['is_block_valid'] is True
assert vote['vote']['invalid_reason'] is None
assert vote['node_pubkey'] == b.me
assert PublicKey(b.me).verify(b.serialize(vote['vote']), vote['signature']) is True
def test_valid_block_voting(self, b):
q_new_block = mp.Queue()
genesis = b.create_genesis_block()
# create valid block
block = b.create_block([])
# assert block is valid
assert b.is_valid_block(block)
b.write_block(block, durability='hard')
# create queue and voter
voter = Voter(q_new_block)
# vote
voter.start()
# wait for vote to be written
time.sleep(1)
voter.kill()
# retrive block from bigchain
blocks = list(r.table('bigchain')
.order_by(r.asc((r.row['block']['timestamp'])))
.run(b.conn))
# validate vote
assert len(blocks[1]['votes']) == 1
vote = blocks[1]['votes'][0]
assert vote['vote']['voting_for_block'] == block['id']
assert vote['vote']['previous_block'] == genesis['id']
assert vote['vote']['is_block_valid'] is True
assert vote['vote']['invalid_reason'] is None
assert vote['node_pubkey'] == b.me
assert PublicKey(b.me).verify(util.serialize(vote['vote']), vote['signature']) is True
def test_create_new_block(self, b):
new_block = b.create_block([])
block_hash = hash_data(b.serialize(new_block['block']))
assert new_block['block']['voters'] == [b.me]
assert new_block['block']['node_pubkey'] == b.me
assert PublicKey(b.me).verify(b.serialize(new_block['block']), new_block['signature']) is True
assert new_block['id'] == block_hash
assert new_block['votes'] == []
def test_vote_creation_valid(self, b):
# create valid block
block = b.create_block([])
# retrieve vote
vote = b.vote(block, 'abc', True)
# assert vote is correct
assert vote['vote']['voting_for_block'] == block['id']
assert vote['vote']['previous_block'] == 'abc'
assert vote['vote']['is_block_valid'] is True
assert vote['vote']['invalid_reason'] is None
assert vote['node_pubkey'] == b.me
assert PublicKey(b.me).verify(b.serialize(vote['vote']), vote['signature']) is True
def verify_signature(self, signed_transaction):
"""Verify the signature of a transaction
A valid transaction should have been signed `current_owner` corresponding private key.
Args:
signed_transaction (dict): a transaction with the `signature` included.
Returns:
bool: True if the signature is correct, False otherwise.
"""
data = signed_transaction.copy()
# if assignee field in the transaction, remove it
if 'assignee' in data:
data.pop('assignee')
signature = data.pop('signature')
public_key_base58 = signed_transaction['transaction']['current_owner']
public_key = PublicKey(public_key_base58)
return public_key.verify(self.serialize(data), signature)
def verify_signature(signed_transaction):
"""Verify the signature of a transaction
A valid transaction should have been signed `current_owner` corresponding private key.
Args:
signed_transaction (dict): a transaction with the `signature` included.
Returns:
bool: True if the signature is correct, False otherwise.
"""
data = signed_transaction.copy()
# if assignee field in the transaction, remove it
if 'assignee' in data:
data.pop('assignee')
signatures = data.pop('signatures')
for public_key_base58 in signed_transaction['transaction'][
'current_owners']:
public_key = PublicKey(public_key_base58)
if isinstance(signatures, list):
try:
signature = [
s['signature'] for s in signatures
if s['public_key'] == public_key_base58
]
except KeyError:
return False
if not len(signature) == 1:
return False
signature = signature[0]
else:
signature = signatures
if not public_key.verify(serialize(data), signature):
return False
return True
def test_invalid_block_voting(self, b, user_public_key):
# create queue and voter
q_new_block = mp.Queue()
voter = Voter(q_new_block)
# create transaction
transaction = b.create_transaction(b.me, user_public_key, None,
'CREATE')
transaction_signed = b.sign_transaction(transaction, b.me_private)
genesis = b.create_genesis_block()
# create invalid block
block = b.create_block([transaction_signed])
# change transaction id to make it invalid
block['block']['transactions'][0]['id'] = 'abc'
assert b.is_valid_block(block) is False
b.write_block(block, durability='hard')
# insert into queue
# FIXME: we disable this because the voter can currently vote more than one time for a block
# q_new_block.put(block)
# vote
voter.start()
# wait for the vote to be written
time.sleep(1)
voter.kill()
# retrive block from bigchain
bigchain_block = r.table('bigchain').get(block['id']).run(b.conn)
# validate vote
assert len(bigchain_block['votes']) == 1
vote = bigchain_block['votes'][0]
assert vote['vote']['voting_for_block'] == block['id']
assert vote['vote']['previous_block'] == genesis['id']
assert vote['vote']['is_block_valid'] is False
assert vote['vote']['invalid_reason'] is None
assert vote['node_pubkey'] == b.me
assert PublicKey(b.me).verify(util.serialize(vote['vote']),
vote['signature']) is True
def test_invalid_block_voting(self, b):
# create queue and voter
q_new_block = mp.Queue()
voter = Voter(q_new_block)
# create transaction
transaction = b.create_transaction(b.me, USER_PUBLIC_KEY, None,
'CREATE')
transaction_signed = b.sign_transaction(transaction, b.me_private)
genesis = b.create_genesis_block()
# create invalid block
block = b.create_block([transaction_signed])
# change transaction id to make it invalid
block['block']['transactions'][0]['id'] = 'abc'
assert not b.is_valid_block(block)
b.write_block(block, durability='hard')
# vote
voter.start()
time.sleep(1)
voter.kill()
# retrive block from bigchain
blocks = list(
r.table('bigchain').order_by(r.asc(
(r.row['block']['timestamp']))).run(b.conn))
# validate vote
assert len(blocks[1]['votes']) == 1
vote = blocks[1]['votes'][0]
assert vote['vote']['voting_for_block'] == block['id']
assert vote['vote']['previous_block'] == genesis['id']
assert vote['vote']['is_block_valid'] == False
assert vote['vote']['invalid_reason'] == None
assert vote['node_pubkey'] == b.me
assert PublicKey(b.me).verify(b.serialize(vote['vote']),
vote['signature']) == True
def test_public_key_encode(self):
public_value_compressed_base58 = PublicKey.encode(self.PUBLIC_VALUE_X, self.PUBLIC_VALUE_Y)
assert public_value_compressed_base58 == self.PUBLIC_VALUE_COMPRESSED_B58
def test_sign_verify(self):
message = 'Hello World!'
public_key = PublicKey(self.PUBLIC_VALUE_COMPRESSED_B58)
private_key = PrivateKey(self.PRIVATE_VALUE_B58)
assert public_key.verify(message, private_key.sign(message)) is True
def test_public_key_decode(self):
public_value_x, public_value_y = PublicKey.decode(self.PUBLIC_VALUE_COMPRESSED_B58)
assert public_value_x == self.PUBLIC_VALUE_X
assert public_value_y == self.PUBLIC_VALUE_Y
def test_public_key_encode(self):
public_value_compressed_base58 = PublicKey.encode(self.PUBLIC_VALUE_X, self.PUBLIC_VALUE_Y)
assert public_value_compressed_base58 == self.PUBLIC_VALUE_COMPRESSED_B58
def test_public_key_decode(self):
public_value_x, public_value_y = PublicKey.decode(self.PUBLIC_VALUE_COMPRESSED_B58)
assert public_value_x == self.PUBLIC_VALUE_X
assert public_value_y == self.PUBLIC_VALUE_Y
def test_sign_verify(self):
message = 'Hello World!'
public_key = PublicKey(self.PUBLIC_VALUE_COMPRESSED_B58)
private_key = PrivateKey(self.PRIVATE_VALUE_B58)
assert public_key.verify(message, private_key.sign(message)) == True
def test_valid_block_voting_with_transfer_transactions(self, b):
q_new_block = mp.Queue()
b.create_genesis_block()
# create a `CREATE` transaction
test_user_priv, test_user_pub = generate_key_pair()
tx = b.create_transaction(b.me, test_user_pub, None, 'CREATE')
tx_signed = b.sign_transaction(tx, b.me_private)
assert b.is_valid_transaction(tx_signed)
# create valid block
block = b.create_block([tx_signed])
# assert block is valid
assert b.is_valid_block(block)
b.write_block(block, durability='hard')
# create queue and voter
voter = Voter(q_new_block)
# vote
voter.start()
# wait for vote to be written
time.sleep(1)
voter.kill()
# retrive block from bigchain
blocks = list(r.table('bigchain')
.order_by(r.asc((r.row['block']['timestamp'])))
.run(b.conn))
# validate vote
assert len(blocks[1]['votes']) == 1
# create a `TRANSFER` transaction
test_user2_priv, test_user2_pub = generate_key_pair()
tx2 = b.create_transaction(test_user_pub, test_user2_pub, tx['id'], 'TRANSFER')
tx2_signed = b.sign_transaction(tx2, test_user_priv)
assert b.is_valid_transaction(tx2_signed)
# create valid block
block = b.create_block([tx2_signed])
# assert block is valid
assert b.is_valid_block(block)
b.write_block(block, durability='hard')
# create queue and voter
voter = Voter(q_new_block)
# vote
voter.start()
# wait for vote to be written
time.sleep(1)
voter.kill()
# retrive block from bigchain
blocks = list(r.table('bigchain')
.order_by(r.asc((r.row['block']['timestamp'])))
.run(b.conn))
# validate vote
assert len(blocks[2]['votes']) == 1
vote = blocks[2]['votes'][0]
assert vote['vote']['voting_for_block'] == block['id']
assert vote['vote']['is_block_valid'] is True
assert vote['vote']['invalid_reason'] is None
assert vote['node_pubkey'] == b.me
assert PublicKey(b.me).verify(util.serialize(vote['vote']), vote['signature']) is True
def test_generate_key_pair(self):
private_value_base58, public_value_compressed_base58 = generate_key_pair()
assert PrivateKey.encode(
PrivateKey.decode(private_value_base58)) == private_value_base58
assert PublicKey.encode(
*PublicKey.decode(public_value_compressed_base58)) == public_value_compressed_base58