def test_node_broadcast_unavailable(self):
Time.use_test_time()
Time.set_current_time(1)
private_keys = BlockSigners()
private_keys = private_keys.block_signers
validators = Validators()
validators.validators = Validators.read_genesis_validators_from_file()
validators.signers_order = [0] + [1] * Epoch.get_duration()
validators.randomizers_order = [0] * Epoch.get_duration()
network = Network()
node0 = Node(genesis_creation_time=1,
node_id=0,
network=network,
block_signer=private_keys[0],
validators=validators,
behaviour=Behaviour())
network.register_node(node0)
# behaviour flag for disabling node to broadcast
behaviour = Behaviour()
behaviour.transport_node_disable_output = True
node1 = Node(genesis_creation_time=1,
node_id=1,
network=network,
block_signer=private_keys[1],
validators=validators,
behaviour=behaviour)
network.register_node(node1)
Time.advance_to_next_timeslot()
node0.step() # provide block
self.assertEqual(len(node0.dag.blocks_by_number),
2) # ensure that node0 provide block to chain
self.assertEqual(len(node1.dag.blocks_by_number),
2) # ensure that node1 receive block
node1.step() # do nothing
self.assertEqual(len(node0.dag.blocks_by_number), 2)
self.assertEqual(len(node1.dag.blocks_by_number), 2)
Time.advance_to_next_timeslot()
node0.step() # do nothing
node1.step(
) # node1 must provide block (and public key tx) but unable to broadcast it by network
self.assertEqual(len(node0.dag.blocks_by_number), 2)
self.assertEqual(len(node1.dag.blocks_by_number), 3)
def get_stake_actions(self, epoch_hash):
epoch_iter = ChainIter(self.epoch.dag, epoch_hash)
stake_actions = []
count = 0
for block in epoch_iter:
if epoch_iter.block_number == 0:
break
if block:
for tx in block.block.system_txs:
if isinstance(tx, StakeHoldTransaction) \
or isinstance(tx, StakeReleaseTransaction) \
or isinstance(tx, PenaltyTransaction) \
or isinstance(tx, PenaltyGossipTransaction):
stake_actions.append(tx)
count += 1
if count == Epoch.get_duration():
break
stake_actions = list(reversed(stake_actions))
return stake_actions
def test_maliciously_send_negative_and_positive_gossip(self):
Time.use_test_time()
Time.set_current_time(1)
private_keys = BlockSigners()
private_keys = private_keys.block_signers
validators = Validators()
validators.validators = Validators.read_genesis_validators_from_file()
validators.signers_order = [0] + [1] + [2] + [3] + [
4
] + [5] * Epoch.get_duration()
validators.randomizers_order = [0] * Epoch.get_duration()
signer_index = 0
for i in Epoch.get_round_range(1, Round.PRIVATE):
validators.signers_order[i] = signer_index
signer_index += 1
network = Network()
node0 = Node(genesis_creation_time=1,
node_id=0,
network=network,
block_signer=private_keys[0],
validators=validators,
behaviour=Behaviour())
network.register_node(node0)
behavior = Behaviour(
) # this node maliciously send positive and negative gossip
behavior.malicious_send_negative_gossip_count = 1
behavior.malicious_send_positive_gossip_count = 1
node1 = Node(genesis_creation_time=1,
node_id=1,
network=network,
block_signer=private_keys[1],
validators=validators,
behaviour=behavior)
network.register_node(node1)
node2 = Node(genesis_creation_time=1,
node_id=2,
network=network,
block_signer=private_keys[2],
validators=validators,
behaviour=Behaviour())
network.register_node(node2)
node3 = Node(genesis_creation_time=1,
node_id=3,
network=network,
block_signer=private_keys[3],
validators=validators,
behaviour=Behaviour())
network.register_node(node3)
node4 = Node(genesis_creation_time=1,
node_id=4,
network=network,
block_signer=private_keys[4],
validators=validators,
behaviour=Behaviour())
network.register_node(node4)
node5 = Node(genesis_creation_time=1,
node_id=5,
network=network,
block_signer=private_keys[5],
validators=validators,
behaviour=Behaviour())
network.register_node(node5)
helper = TestHelper(network)
Time.advance_to_next_timeslot() # current block number 1
node0.step() # create and sign block
# validate block created and broadcasted
# validate mempool is empty
# validate tx by hash is empty
helper.list_validator(self, network.nodes,
['dag.blocks_by_number.length'], 2)
helper.list_validator(self, network.nodes, ['mempool.gossips.length'],
0)
# validate 2 public key tx
helper.list_validator(self, network.nodes,
['dag.transactions_by_hash.length'], 1)
# on one step sends +and- (add test for different steps ?)
node1.step(
) # ! maliciously sand positive and negative gossip (request by genesis 0 block)
# all node receive positive gossip
# txs for now only in mempool (not in block)
helper.list_validator(self, network.nodes,
['dag.blocks_by_number.length'], 2)
# all nodes has 1-gossip and 6+gossips (1-gossip and 6+gossip from (0,1,2,3,4,5))
helper.list_validator(self, network.nodes, ['mempool.gossips.length'],
7)
helper.list_validator(self, network.nodes,
['dag.transactions_by_hash.length'], 1)
node2.step()
node3.step()
node4.step()
node5.step()
# after all steps situation same
helper.list_validator(self, network.nodes,
['dag.blocks_by_number.length'], 2)
helper.list_validator(self, network.nodes, ['mempool.gossips.length'],
7)
helper.list_validator(self, network.nodes,
['dag.transactions_by_hash.length'], 1)
Time.advance_to_next_timeslot() # current block number 2
node0.step() # do nothing
node1.step(
) # is validator by order (need to marge mempool and provide block)
# in current case node will penaltize SELF !!!
helper.list_validator(self, network.nodes,
['dag.blocks_by_number.length'], 3)
helper.list_validator(self, network.nodes, ['mempool.gossips.length'],
0)
# tx_s
# 3 - public key tx
# 1 - negative gossip tx
# 6 - positive gossip txs
# 1 - penalty tx
# total = 11 txs
if ROUND_DURATION > 6: # total 6 nodes in test
public_key_tx_count = 6
else:
public_key_tx_count = ROUND_DURATION
negative_gossip_tx_count = 1
positive_gossips_tx_count = 6
penalty_tx_count = 1
tx_total_count = public_key_tx_count + negative_gossip_tx_count + positive_gossips_tx_count + penalty_tx_count
helper.list_validator(self, network.nodes,
['dag.transactions_by_hash.length'],
tx_total_count)
node2.step()
node3.step()
node4.step()
node5.step()
# validate that all keeps the same
helper.list_validator(self, network.nodes,
['dag.blocks_by_number.length'], 3)
helper.list_validator(self, network.nodes, ['mempool.gossips.length'],
0)
helper.list_validator(self, network.nodes,
['dag.transactions_by_hash.length'],
tx_total_count)
# verify that node1 is steel in validators list
helper.list_validator(self, network.nodes,
['permissions.epoch_validators.length'],
GENESIS_VALIDATORS_COUNT)
Time.advance_to_next_timeslot() # current block number 3
node0.step() # do nothing
node1.step() # do nothing
node2.step() # provide block
node3.step()
node4.step()
node5.step()
# validate new block by node2
helper.list_validator(self, network.nodes,
['dag.blocks_by_number.length'], 4)
# verify that node1 is steel in validators list until epoch end
helper.list_validator(self, network.nodes,
['permissions.epoch_validators.length'],
GENESIS_VALIDATORS_COUNT)
for i in range(5, ROUND_DURATION * 6 + 1):
Time.advance_to_next_timeslot()
if i == ROUND_DURATION * 6 + 1:
node0.step()
node0.step()
node1.step()
node2.step()
node3.step()
node4.step()
node5.step()
if i == ROUND_DURATION * 6 + 1:
# ! chek up validators list on new epoch upcoming
# TODO sometimes fall for unknoun reason
# self.list_validator(network.nodes, ['dag.blocks_by_number.length'], i)
for node in network.nodes:
if len(node.dag.blocks_by_number) != i - 1:
print('BLOCK_NUMBER : ' + str(i))
print('node id:' + str(node.node_id) +
" dag.block_by_number:" +
str(len(node1.dag.blocks_by_number)))
helper.list_validator(self, network.nodes,
['permissions.epoch_validators.length'],
GENESIS_VALIDATORS_COUNT - 1)
# TODO nodes recalculates 2 times ?
helper.list_validator(
self, network.nodes,
['permissions.epoch_validators.epoch0.length'],
GENESIS_VALIDATORS_COUNT - 1)
# maybe 20 (on default block time and round duration)
helper.list_validator(
self, network.nodes,
['permissions.epoch_validators.epoch1.length'],
GENESIS_VALIDATORS_COUNT - 1)
def test_maliciously_send_positive_gossip(self):
Time.use_test_time()
Time.set_current_time(1)
private_keys = BlockSigners()
private_keys = private_keys.block_signers
validators = Validators()
validators.validators = Validators.read_genesis_validators_from_file()
validators.signers_order = [0, 1, 2, 3, 4, 5] * ROUND_DURATION * 6
validators.randomizers_order = [0] * Epoch.get_duration()
network = Network()
node0 = Node(genesis_creation_time=1,
node_id=0,
network=network,
block_signer=private_keys[0],
validators=validators,
behaviour=Behaviour())
network.register_node(node0)
behavior = Behaviour() # this node maliciously send positive gossip
behavior.malicious_send_positive_gossip_count = 1
node1 = Node(genesis_creation_time=1,
node_id=1,
network=network,
block_signer=private_keys[1],
validators=validators,
behaviour=behavior)
network.register_node(node1)
node2 = Node(genesis_creation_time=1,
node_id=2,
network=network,
block_signer=private_keys[2],
validators=validators,
behaviour=Behaviour())
network.register_node(node2)
node3 = Node(genesis_creation_time=1,
node_id=3,
network=network,
block_signer=private_keys[3],
validators=validators,
behaviour=Behaviour())
network.register_node(node3)
node4 = Node(genesis_creation_time=1,
node_id=4,
network=network,
block_signer=private_keys[4],
validators=validators,
behaviour=Behaviour())
network.register_node(node4)
node5 = Node(genesis_creation_time=1,
node_id=5,
network=network,
block_signer=private_keys[5],
validators=validators,
behaviour=Behaviour())
network.register_node(node5)
helper = TestHelper(network)
Time.advance_to_next_timeslot() # current block number 1
node0.step() # create and sign block
# validate block created and broadcasted
# validate mempool is empty
helper.list_validator(self, network.nodes,
['dag.blocks_by_number.length'], 2)
helper.list_validator(self, network.nodes, ['mempool.gossips.length'],
0)
node1.step(
) # ! maliciously sand positive gossip (request by genesis 0 block)
# all node receive positive gossip
# txs for now only in mempool (not in block)
helper.list_validator(self, network.nodes,
['dag.blocks_by_number.length'], 2)
# all nodes has 1+gossips
helper.list_validator(self, network.nodes, ['mempool.gossips.length'],
1)
node2.step()
node3.step()
node4.step()
node5.step()
# after all steps situation same
helper.list_validator(self, network.nodes,
['dag.blocks_by_number.length'], 2)
helper.list_validator(self, network.nodes, ['mempool.gossips.length'],
1)
Time.advance_to_next_timeslot() # current block number 2
node0.step() # do nothing
node1.step(
) # is validator by order (need to marge mempool and provide block)
# возможно добавить проверку на малишес скип блок в добавок ?
# (по идеи все должны еще раз обменятся госипами и уже не найти блок 2)
# (в таком случае следующий валидатор должен смерджить все и отправить блок)
# (нода 1 должна быть исключена из списка валидаторов ?)
# after node create and sign block all node clean its mem pool
# here we have 3 blocks, empty mem pools, and transaction in dag.transaction_by_hash
helper.list_validator(self, network.nodes,
['dag.blocks_by_number.length'], 3)
helper.list_validator(self, network.nodes, ['mempool.gossips.length'],
0)
node2.step()
node3.step()
node4.step()
node5.step()
# validate that all keeps the same
helper.list_validator(self, network.nodes,
['dag.blocks_by_number.length'], 3)
helper.list_validator(self, network.nodes, ['mempool.gossips.length'],
0)
Time.advance_to_next_timeslot() # current block number 3
node0.step() # do nothing
node1.step() # do nothing
node2.step() # provide block
node3.step()
node4.step()
node5.step()
# validate new block by node2
helper.list_validator(self, network.nodes,
['dag.blocks_by_number.length'], 4)
def test_negative_gossip_by_zeta(self):
Time.use_test_time()
Time.set_current_time(1)
private_keys = BlockSigners()
private_keys = private_keys.block_signers
validators = Validators()
validators.validators = Validators.read_genesis_validators_from_file()
validators.signers_order = [0] + [1] + [2] + [3] + [
4
] + [5] * Epoch.get_duration()
validators.randomizers_order = [0] * Epoch.get_duration()
network = Network()
node0 = Node(genesis_creation_time=1,
node_id=0,
network=network,
block_signer=private_keys[0],
validators=validators,
behaviour=Behaviour())
network.register_node(node0)
behavior = Behaviour() # this node malicious skip block
behavior.malicious_skip_block = True
node1 = Node(genesis_creation_time=1,
node_id=1,
network=network,
block_signer=private_keys[1],
validators=validators,
behaviour=behavior)
network.register_node(node1)
node2 = Node(genesis_creation_time=1,
node_id=2,
network=network,
block_signer=private_keys[2],
validators=validators,
behaviour=Behaviour())
network.register_node(node2)
node3 = Node(genesis_creation_time=1,
node_id=3,
network=network,
block_signer=private_keys[3],
validators=validators,
behaviour=Behaviour())
network.register_node(node3)
node4 = Node(genesis_creation_time=1,
node_id=4,
network=network,
block_signer=private_keys[4],
validators=validators,
behaviour=Behaviour())
network.register_node(node4)
node5 = Node(genesis_creation_time=1,
node_id=5,
network=network,
block_signer=private_keys[5],
validators=validators,
behaviour=Behaviour())
network.register_node(node5)
helper = TestHelper(network)
Time.advance_to_next_timeslot() # current block number 1
node0.step() # create and sign block
node1.step()
node2.step()
node3.step()
node4.step()
node5.step()
# validate block created and broadcasted
helper.list_validator(self, network.nodes,
['dag.blocks_by_number.length'], 2)
Time.advance_to_next_timeslot() # current block number 1
node0.step()
node1.step() # skip block creation
node2.step()
node3.step()
node4.step()
node5.step()
# validate block NOT created and NOT broadcasted
helper.list_validator(self, network.nodes,
['dag.blocks_by_number.length'], 2)
Time.advance_to_next_timeslot() # current block number 2
# for now all chain do not have block from previous timeslot
node0.step() # broadcast negative gossip
# all nodes handle negative gossips by node0
# not broadcast to self (ADD TO MEMPOOL before broadcast)
helper.list_validator(self, network.nodes, ['mempool.gossips.length'],
0) # not permited for gossip send
node1.step() # broadcast negative gossip
helper.list_validator(self, network.nodes, ['mempool.gossips.length'],
1)
node2.step(
) # broadcast negative gossip AND skip block signing for current step !!!
node3.step() # broadcast negative gossip
node4.step() # broadcast negative gossip
node5.step(
) # VALIDATE 5 NEGATIVE GOSSIPS AND DO NOT BROADCAST ANOTHER ONE (current ZETA == 5)
# GOSSIPS may be more - see test_negative_gossips_zata_validators
helper.list_validator(self, network.nodes, ['mempool.gossips.length'],
5)
# duplicate gossips tx will NOT include to mempool !
# if node already send negative gossip IT NOT broadcast it again !
# if node already have x < ZETA (x - different negative gossips by block count) IT NOT broadcast it again !
Time.advance_time(1) # advance time by one second in current timeslot
# make steps by nodes
node0.step() #
node1.step() #
# steel 5 negative gossips (from 0,1,2,3,4) on all nodes (add validation ?)
helper.list_validator(self, network.nodes, ['mempool.gossips.length'],
5)
node2.step(
) # CREATE, SIGN, BROADCAST block (block by node1 not exist)
# all nodes handle new block
helper.list_validator(self, network.nodes,
['dag.blocks_by_number.length'], 3)
# gossips cleaned from mem pool by block handling
helper.list_validator(self, network.nodes, ['mempool.gossips.length'],
0)
node3.step() #
node4.step() #
node5.step() #
# provide validation for next normal block and FOR GOSSIPS is NOT in mempool after next block
Time.advance_to_next_timeslot() # current block number 3
node0.step() #
node1.step() #
node2.step() #
node3.step(
) # must create and sign and broadcast block (all gossips MUST be mined and erased from mempool)
node4.step() #
node5.step() #
# after node2 step
helper.list_validator(self, network.nodes,
['dag.blocks_by_number.length'], 4)
helper.list_validator(self, network.nodes, ['mempool.gossips.length'],
0)
def test_send_negative_gossip_by_validator(self):
Time.use_test_time()
Time.set_current_time(1)
private_keys = BlockSigners()
private_keys = private_keys.block_signers
validators = Validators()
validators.validators = Validators.read_genesis_validators_from_file()
validators.signers_order = [0] + [1] + [2] * Epoch.get_duration()
validators.randomizers_order = [0] * Epoch.get_duration()
network = Network()
node0 = Node(genesis_creation_time=1,
node_id=0,
network=network,
block_signer=private_keys[0],
validators=validators,
behaviour=Behaviour())
network.register_node(node0)
behavior = Behaviour()
behavior.transport_cancel_block_broadcast = True
node1 = Node(genesis_creation_time=1,
node_id=1,
network=network,
block_signer=private_keys[1],
validators=validators,
behaviour=behavior)
network.register_node(node1)
node2 = Node(genesis_creation_time=1,
node_id=2,
network=network,
block_signer=private_keys[2],
validators=validators,
behaviour=Behaviour())
network.register_node(node2)
# same config from prev. test
Time.advance_to_next_timeslot() # current block number 1
node0.step() # create and sign block
node1.step()
node2.step()
self.assertTrue(len(node0.dag.blocks_by_number) == 2, True)
self.assertTrue(len(node1.dag.blocks_by_number) == 2, True)
self.assertTrue(len(node2.dag.blocks_by_number) == 2, True)
# asset that node0 create block number 2
#
Time.advance_to_next_timeslot() # current block number 2
node0.step()
node1.step() # skip broadcasting block
node2.step()
self.assertTrue(len(node0.dag.blocks_by_number) == 2, True)
self.assertTrue(len(node1.dag.blocks_by_number) == 3, True)
self.assertTrue(len(node2.dag.blocks_by_number) == 2, True)
# assert that block 3 created on node1 but not broadcasted to node0 and node2
#
Time.advance_to_next_timeslot() # current block number 3
node2.step(
) # MAKE FIRST STEP BY CURRENT TIMESLOT VALIDATOR (BLOCK SIGNER)
self.assertTrue(len(node0.dag.blocks_by_number) == 3, True)
self.assertTrue(len(node1.dag.blocks_by_number) == 3, True)
self.assertTrue(len(node2.dag.blocks_by_number) == 3, True)
# assert that all listeners nodes receive missed block`s
Time.advance_time(1) # ADVANCE TIME BY ONE SECOND TIMESLOT SAME
node2.step()
self.assertTrue(len(node0.dag.blocks_by_number) == 4, True)
self.assertTrue(len(node1.dag.blocks_by_number) == 4, True)
self.assertTrue(len(node2.dag.blocks_by_number) == 4, True)
# assert that node 2 create, sign, broadcast and deliver block number 4
# for certainty we will make some more steps by NOT VALIDATOR nodes's
node0.step()
node1.step()
node1.step()
node0.step()
node0.step()
Time.advance_to_next_timeslot() # current block number 4
node0.step()
node1.step()
node2.step()
# step by all and validate block 5
self.assertTrue(len(node0.dag.blocks_by_number) == 5, True)
self.assertTrue(len(node1.dag.blocks_by_number) == 5, True)
self.assertTrue(len(node2.dag.blocks_by_number) == 5, True)
def test_send_negative_gossip(self):
Time.use_test_time()
Time.set_current_time(1)
private_keys = BlockSigners()
private_keys = private_keys.block_signers
validators = Validators()
validators.validators = Validators.read_genesis_validators_from_file()
validators.signers_order = [0, 1] * (Epoch.get_duration() // 2)
validators.randomizers_order = [0] * Epoch.get_duration()
network = Network()
behavior = Behaviour()
behavior.malicious_skip_block = True
node0 = Node(genesis_creation_time=1,
node_id=0,
network=network,
block_signer=private_keys[0],
validators=validators,
behaviour=behavior)
network.register_node(node0)
node1 = Node(genesis_creation_time=1,
node_id=1,
network=network,
block_signer=private_keys[1],
validators=validators,
behaviour=Behaviour())
network.register_node(node1)
Time.advance_to_next_timeslot()
node0.step()
self.assertEqual(len(node0.dag.blocks_by_number),
1) # ensure that block skipped by node0
node1.step()
self.assertEqual(len(node0.dag.blocks_by_number),
1) # ensure that block not received by node1
Time.advance_to_next_timeslot()
# on next step node0 broadcast negative gossip
node0.step()
# and include! it to (node0) self.mempool
self.assertEqual(len(node0.mempool.gossips), 1)
# assume that negative gossip broadcasted and placed to node1 mempool
self.assertEqual(len(node1.mempool.gossips), 1)
# -----------------------------------
# on next step node 1 will send negative gossip
# node1 MUST create and sign block which contain negative gossip and broadcast it
node1.step()
# node1 in it's step broadcast(GOSSIP-) and at the same time SKIP!!! method
# self.try_to_sign_block(current_block_number)
# A second step is needed to create and sign a block within the same time slot
Time.advance_time(
1
) # !!! -----> advance time by 1 second (DO NOT CHANGE TIMESLOT) !!!
node1.step()
# -----------------------------------
# verify that node1 make block broadcast
self.assertEqual(len(node1.dag.blocks_by_number), 2)
# verify that node0 receive new block
self.assertEqual(len(node0.dag.blocks_by_number), 2)
# verify that negative gossip transaction is in block
system_txs = node0.dag.blocks_by_number[2][0].block.system_txs
self.assertTrue(NegativeGossipTransaction.__class__,
system_txs[3].__class__)
def test_make_node_offline_from_block(self):
Time.use_test_time()
Time.set_current_time(1)
private_keys = BlockSigners()
private_keys = private_keys.block_signers
validators = Validators()
validators.validators = Validators.read_genesis_validators_from_file()
validators.signers_order = ([0] + [1] + [2]) * Epoch.get_duration()
validators.randomizers_order = [0] * Epoch.get_duration()
network = Network()
node0 = Node(genesis_creation_time=1,
node_id=0,
network=network,
block_signer=private_keys[0],
validators=validators,
behaviour=Behaviour())
network.register_node(node0)
node1 = Node(genesis_creation_time=1,
node_id=1,
network=network,
block_signer=private_keys[1],
validators=validators,
behaviour=Behaviour())
network.register_node(node1)
behaviour = Behaviour()
behaviour.transport_keep_offline = [
4, 6
] # keep offline from 4 block till 6 block
node2 = Node(genesis_creation_time=1,
node_id=2,
network=network,
block_signer=private_keys[2],
validators=validators,
behaviour=behaviour)
network.register_node(
node2) # emulate node total offline from 4 block till 6 block
# ------------------------------- block 1
Time.advance_to_next_timeslot()
node0.step() # provide block
node1.step()
node2.step()
self.assertEqual(len(node0.dag.blocks_by_number), 2)
self.assertEqual(len(node1.dag.blocks_by_number), 2)
self.assertEqual(len(node2.dag.blocks_by_number), 2)
# ------------------------------- block 2
Time.advance_to_next_timeslot()
node0.step()
node1.step() # provide block
node2.step()
self.assertEqual(len(node0.dag.blocks_by_number), 3)
self.assertEqual(len(node1.dag.blocks_by_number), 3)
self.assertEqual(len(node2.dag.blocks_by_number), 3)
# ------------------------------- block 3
Time.advance_to_next_timeslot()
node0.step()
node1.step()
node2.step() # provide block
self.assertEqual(len(node0.dag.blocks_by_number), 4)
self.assertEqual(len(node1.dag.blocks_by_number), 4)
self.assertEqual(len(node2.dag.blocks_by_number), 4)
# ------------------------------- block 4
# node 2 must set offline on next block
Time.advance_to_next_timeslot()
node0.step() # provide block
node1.step()
node2.step() # AFTER NODE STEP IT MAKES OFFLINE !
self.assertEqual(len(node0.dag.blocks_by_number), 5)
self.assertEqual(len(node1.dag.blocks_by_number), 5)
self.assertEqual(len(node2.dag.blocks_by_number),
5) # RECEIVE BLOCK BEFORE BEHAVIOUR UPDATES
# ------------------------------- block 5
# node 2 offline
Time.advance_to_next_timeslot()
node0.step()
node1.step() # provide block
node2.step()
self.assertEqual(len(node0.dag.blocks_by_number), 6)
self.assertEqual(len(node1.dag.blocks_by_number), 6)
self.assertEqual(len(node2.dag.blocks_by_number),
5) # DO NOT RECEIVE BLOCK !
# ------------------------------- block 6
# node 2 offline
Time.advance_to_next_timeslot()
node0.step()
node1.step()
node2.step(
) # DO NOT RECEIVE BLOCK wait for nex step # + produce but not broadcast negative gossip
self.assertEqual(len(node0.dag.blocks_by_number), 6)
self.assertEqual(len(node1.dag.blocks_by_number), 6)
self.assertEqual(len(node2.dag.blocks_by_number),
5) # DO NOT RECEIVE BLOCK !
node0.step()
node1.step()
# node 2 try to sand negative gossip by block 5 (on offline store it in local mempool and add to block !!!!!!!)
# NODE_0 AND NODE_1 DO NOT RECEIVE NEGATIVE GOSSIP BY BLOCK 5
node2.step() # create and store block localy (steel offline)
self.assertEqual(len(node0.dag.blocks_by_number), 6)
self.assertEqual(len(node1.dag.blocks_by_number), 6)
self.assertEqual(len(node2.dag.blocks_by_number),
6) # node 2 forks chain
# ------------------------------- block 7 (timeslot)
# node 2 make online again on step
Time.advance_to_next_timeslot()
node0.step(
) # provide negative gossip for block 6 before creating and broadcasting block
node1.step() # provide negative gossip for block 6
node2.step(
) # current step makes node online (its do not receive gossips from node0 and node1) (variant A)
self.assertEqual(len(node0.dag.blocks_by_number), 6)
self.assertEqual(len(node1.dag.blocks_by_number), 6)
self.assertEqual(len(node2.dag.blocks_by_number), 6)
# visualization and description block ===========================================
# DagVisualizer.visualize(node0.dag)
# DagVisualizer.visualize(node2.dag)
# on current time nodes have such blocks
# timeslot[0, 1, 2, 3, 4, 5, 6, 7]
# ====================================
# node0 - [0, 1, 2, 3, 4, 5, <>, node0]
# node1 - [0, 1, 2, 3, 4, 5, <>, ]
# node2 - [0, 1, 2, 3, 4, <>, 6, ]
# ancessor for block 7 is block 5
# ancessor for block 5 is block 4
# node2 request block 5 as ancestor for block 7 (block 6 was skipped till node was offline)
# node2 received and insert block 5 as conflict to empty timeslot till offline to block 6
# block 6 was created offline, need to skip all its tx's and softly drop
# visualization and description block ===========================================
# node0 - provide block 7
node0.step() # create and broadcast block number 7
# visualization and description block ===========================================
# DagVisualizer.visualize(node0.dag) # [0,1,2,3,4,5,6,<>,7]
# by timeslots [ 5,<>, 6]
# DagVisualizer.visualize(node2.dag) # [0,1,2,3,4,<>, 6, -]
# visualization and description block ===========================================
node1.step() # handle and add block normaly
node2.step(
) # handled all ancestor blocks and inset it to dag with processing included transactions
self.assertEqual(len(node0.dag.blocks_by_number), 7)
self.assertEqual(len(node1.dag.blocks_by_number), 7)
self.assertEqual(len(node2.dag.blocks_by_number),
8) # steel have redundant block 6
# ------------------------------- block 8 (timeslot)
# all nodes online
Time.advance_to_next_timeslot()
node0.step()
node1.step()
node2.step()
self.assertEqual(len(node0.dag.blocks_by_number), 8)
self.assertEqual(len(node1.dag.blocks_by_number), 8)
self.assertEqual(len(node2.dag.blocks_by_number),
9) # steel have redundant block 6
def test_node_offline(self):
Time.use_test_time()
Time.set_current_time(1)
private_keys = BlockSigners()
private_keys = private_keys.block_signers
validators = Validators()
validators.validators = Validators.read_genesis_validators_from_file()
validators.signers_order = [0] + [1] + [2] * Epoch.get_duration()
validators.randomizers_order = [0] * Epoch.get_duration()
network = Network()
node0 = Node(genesis_creation_time=1,
node_id=0,
network=network,
block_signer=private_keys[0],
validators=validators,
behaviour=Behaviour())
network.register_node(node0)
node1 = Node(genesis_creation_time=1,
node_id=1,
network=network,
block_signer=private_keys[1],
validators=validators,
behaviour=Behaviour())
network.register_node(node1)
behaviour = Behaviour()
behaviour.transport_node_disable_input = True
behaviour.transport_node_disable_output = True
node2 = Node(genesis_creation_time=1,
node_id=2,
network=network,
block_signer=private_keys[2],
validators=validators,
behaviour=behaviour)
network.register_node(node2) # emulate node total offline
Time.advance_to_next_timeslot()
node0.step() # provide block
node1.step()
node2.step()
self.assertEqual(len(node0.dag.blocks_by_number), 2)
self.assertEqual(len(node1.dag.blocks_by_number), 2)
self.assertEqual(len(node2.dag.blocks_by_number),
1) # steel have 1 block
Time.advance_to_next_timeslot()
node0.step()
node1.step() # provide block
node2.step()
self.assertEqual(len(node0.dag.blocks_by_number), 3)
self.assertEqual(len(node1.dag.blocks_by_number), 3)
self.assertEqual(len(node2.dag.blocks_by_number),
1) # steel have 1 block
Time.advance_to_next_timeslot()
node0.step()
node1.step()
node2.step() # wit for block and try to broadcast negative gossip
self.assertEqual(len(node0.dag.blocks_by_number), 3)
self.assertEqual(len(node1.dag.blocks_by_number), 3)
self.assertEqual(len(node2.dag.blocks_by_number), 1)
node0.step()
node1.step()
node2.step() # provide block BUT DO NOT BROADCAST
self.assertEqual(len(node0.dag.blocks_by_number), 3)
self.assertEqual(len(node1.dag.blocks_by_number), 3)
self.assertEqual(len(node2.dag.blocks_by_number), 2)
def test_node_handle_unavailable(self):
Time.use_test_time()
Time.set_current_time(1)
private_keys = BlockSigners()
private_keys = private_keys.block_signers
validators = Validators()
validators.validators = Validators.read_genesis_validators_from_file()
validators.signers_order = [0] + [1] * Epoch.get_duration()
validators.randomizers_order = [0] * Epoch.get_duration()
network = Network()
node0 = Node(genesis_creation_time=1,
node_id=0,
network=network,
block_signer=private_keys[0],
validators=validators,
behaviour=Behaviour())
network.register_node(node0)
# behaviour flag for disabling node to broadcast
behaviour = Behaviour()
behaviour.transport_node_disable_input = True
node1 = Node(genesis_creation_time=1,
node_id=1,
network=network,
block_signer=private_keys[1],
validators=validators,
behaviour=behaviour)
network.register_node(node1)
Time.advance_to_next_timeslot()
node0.step() # provide block
self.assertEqual(len(node0.dag.blocks_by_number),
2) # ensure that node0 provide block to chain
self.assertEqual(len(node1.dag.blocks_by_number),
1) # ensure that node1 DO NOT receive block
node1.step()
Time.advance_to_next_timeslot()
node0.step() # do nothing
node1.step() # send negative gossip (block from node0 not received)
self.assertEqual(
len(node0.mempool.gossips),
2) # ensure negative gossip received by node0 (+positive gossip)
self.assertEqual(len(node1.mempool.gossips),
1) # ensure node1 NOT receive positive gossip
node0.step() # provide and block by hash in gossip logic scope
node1.step(
) # node1 do not ask block by hash (cant receive positive gossip due behaviour)
# for node1 block 1 (created by node 0) is not available due behaviour
# node1 produce block by step and sand it by broadcast
self.assertEqual(len(node0.dag.blocks_by_number),
3) # NODE_0 have 2 blocks with genesis ancestor
self.assertEqual(len(node1.dag.blocks_by_number),
2) # have genesis + self produced block
