def __init__(self, epoch, validators=Validators()):
initial_validators = validators.validators
if not initial_validators:
initial_validators = Validators.read_genesis_validators_from_file()
self.epoch = epoch
self.stake_manager = StakeManager(epoch)
genesis_hash = self.epoch.dag.genesis_block().get_hash()
validator_count = len(initial_validators)
initial_signers_indexes = validators.signers_order
if not initial_signers_indexes:
initial_signers_indexes = self.epoch.calculate_validators_indexes(
genesis_hash, validator_count, Source.SIGNERS)
initial_randomizers_indexes = validators.randomizers_order
if not initial_randomizers_indexes:
initial_randomizers_indexes = self.epoch.calculate_validators_indexes(
genesis_hash, validator_count, Source.RANDOMIZERS)
self.log(
"Initial signers:", initial_signers_indexes[0:ROUND_DURATION * 1],
initial_signers_indexes[ROUND_DURATION * 1:ROUND_DURATION * 2],
initial_signers_indexes[ROUND_DURATION * 2:ROUND_DURATION * 3],
initial_signers_indexes[ROUND_DURATION * 3:ROUND_DURATION * 4],
initial_signers_indexes[ROUND_DURATION * 4:ROUND_DURATION * 5],
initial_signers_indexes[ROUND_DURATION * 5:ROUND_DURATION * 6 + 1])
self.log("Initial randomizers:", initial_randomizers_indexes)
# init validators list and indexes, so we can build list of future validators based on this
self.epoch_validators = {genesis_hash: initial_validators}
self.signers_indexes = {genesis_hash: initial_signers_indexes}
self.randomizers_indexes = {genesis_hash: initial_randomizers_indexes}
def test_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()
network = Network()
helper = TestHelper(network)
helper.generate_nodes(private_keys, 19) # create validators
# generate blocks to new epoch
helper.perform_block_steps(22)
DagVisualizer.visualize(network.nodes[0].dag)
# invalidate that node DO not send negative gossip only if have ZETA negatives from next ZETA validators
round_2_signers_order = list(
network.nodes[0].permissions.signers_indexes.values())[
1] # SECOND! EPOCH
last_block_signer_id = round_2_signers_order[2]
last_signed_block_number = network.nodes[
last_block_signer_id].last_signed_block_number
# assert signers order
self.assertEqual(last_signed_block_number, 22)
expected_node_signer_id = round_2_signers_order[
3] # already have 22 blocks
# maliciously skip block by next signer
network.nodes[
expected_node_signer_id].behaviour.transport_cancel_block_broadcast = True
# perform in block step
Time.advance_to_next_timeslot()
# perform step by malicious node (create block and not broadcast)
network.nodes[expected_node_signer_id].step()
# assume that node has block in local dag
for node in network.nodes:
if node.node_id == expected_node_signer_id:
self.assertEqual(len(node.dag.blocks_by_number), 24)
else:
self.assertEqual(len(node.dag.blocks_by_number), 23)
# perform step in timeslot by all nodes
helper.perform_in_block_single_step(3)
Time.advance_to_next_timeslot() # move to next timeslot
network.nodes[
expected_node_signer_id].behaviour.transport_cancel_block_broadcast = False
helper.perform_in_block_single_step(1)
# validate send gossips that all nodes receive block by positive gossip
helper.list_validator(self, network.nodes,
['dag.blocks_by_number.length'], 25)
helper.perform_block_steps(5)
helper.list_validator(self, network.nodes,
['dag.blocks_by_number.length'], 30)
def test_two_node_groups(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()
network = Network()
helper = TestHelper(network)
helper.generate_nodes(private_keys, 19) # create validators
helper.add_stakeholders(9) # add stakeholders to network
# generate blocks to new epoch
helper.perform_block_steps(22)
DagVisualizer.visualize(network.nodes[0].dag)
# divide network into two groups
network.move_nodes_to_group_by_id(1, [
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
19
])
network.move_nodes_to_group_by_id(2, [20, 21, 22, 23, 24, 25, 26, 27])
test_group_1 = network.groups.get(1)
test_group_2 = network.groups.get(2)
# check nodes count in groups
self.assertEqual(len(test_group_1), 20)
self.assertEqual(len(test_group_2), 8)
helper.perform_block_steps(5)
self.assertEqual(len(network.groups.get(1)[0].dag.blocks_by_hash),
28) # group_1 = 28 blocks
self.assertEqual(len(network.groups.get(2)[0].dag.blocks_by_hash),
23) # group_2 = 23 blocks
network.merge_all_groups() # marge all groups
self.assertEqual(len(network.nodes), 28)
helper.perform_block_steps(1) # perform sync timeslot steps
# !!! on performed step all nodes from second group obtain all missed blocks to last received
# [21, 22, 23, 24, 25, 26, 27, 28]
# check first node blocks
self.assertEqual(len(network.nodes[0].dag.blocks_by_hash), 29)
# check last node blocks
self.assertEqual(len(network.nodes[27].dag.blocks_by_hash), 29)
# nodes tops assert
self.assertEqual(network.nodes[27].epoch.tops_and_epochs,
network.nodes[0].epoch.tops_and_epochs)
def test_block_getter_by_node_groups(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()
network = Network()
helper = TestHelper(network)
helper.generate_nodes(private_keys, 19) # create validators
# add validators for group
helper.add_stakeholders(9) # add stakeholders to network
# generate blocks to new epoch
helper.perform_block_steps(22)
# divide network into two groups
network.move_nodes_to_group_by_id(1, [
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
19
])
network.move_nodes_to_group_by_id(2, [20, 21, 22, 23, 24, 25, 26, 27])
# perform step for generate merged block
epoch_0_signers_order = list(
network.nodes[0].permissions.signers_indexes.values())[
0] # SECOND! EPOCH
next_malicious_signer_node_index = epoch_0_signers_order[3]
network.groups[1][
next_malicious_signer_node_index].behaviour.malicious_excessive_block_count = 1
helper.perform_block_steps(1)
self.assertEqual(len(network.groups.get(1)[0].dag.blocks_by_hash),
25) # group_1 = 25 blocks
self.assertEqual(len(network.groups.get(2)[0].dag.blocks_by_hash),
23) # group_2 = 23 blocks
# DagVisualizer.visualize(network.groups.get(1)[0].dag)
# DagVisualizer.visualize(network.groups.get(2)[0].dag)
network.merge_all_groups()
self.assertEqual(len(network.nodes[0].dag.blocks_by_hash), 25)
self.assertEqual(len(network.nodes[27].dag.blocks_by_hash), 23)
helper.perform_block_steps(1)
# all blocks are received and marged by orphan system
self.assertEqual(len(network.nodes[0].dag.blocks_by_hash), 26)
self.assertEqual(len(network.nodes[27].dag.blocks_by_hash), 26)
def test_more_conflict_blocks(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()
network = Network()
helper = TestHelper(network)
helper.generate_nodes(private_keys, 19) # create validators
# generate blocks to new epoch
helper.perform_block_steps(5)
epoch_0_signers_order = list(
network.nodes[0].permissions.signers_indexes.values())[
0] # SECOND! EPOCH
next_malicious_signer_node_index = epoch_0_signers_order[
5] # block count
# set behavior for next validator is_malicious_excessive_block = True
network.nodes[
next_malicious_signer_node_index].behaviour.malicious_excessive_block_count = 2
network.nodes[
next_malicious_signer_node_index].tried_to_sign_current_block = False
network.nodes[
next_malicious_signer_node_index].last_signed_block_number = 0
helper.perform_block_steps(1)
#
network.nodes[
next_malicious_signer_node_index].tried_to_sign_current_block = False
network.nodes[
next_malicious_signer_node_index].last_signed_block_number = 0
helper.perform_block_steps(1)
#
# nodes MUST HAVE +2 conflict blocks
helper.perform_block_steps(1)
helper.perform_block_steps(1)
DagVisualizer.visualize(network.nodes[0].dag)
helper.list_validator(self, network.nodes,
['dag.blocks_by_number.length'],
10) # + 2 conflict
# -- next validator MUST get two block conflicts send transaction
helper.perform_block_steps(1)
helper.list_validator(self, network.nodes,
['dag.blocks_by_number.system_txs'], 1)
# all nodes have all blocks test done
helper.list_validator(self, network.nodes,
['dag.blocks_by_number.length'], 11)
def test_negative_gossips_zata_validators(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()
network = Network()
helper = TestHelper(network)
helper.generate_nodes(private_keys, 19) # create validators
# generate blocks to new epoch
helper.perform_block_steps(22)
# DagVisualizer.visualize(network.nodes[0].dag)
# invalidate that node DO not send negative gossip only if have ZETA negatives from next ZETA validators
round_2_signers_order = list(
network.nodes[0].permissions.signers_indexes.values())[
1] # SECOND! EPOCH
expected_node_signer_id = round_2_signers_order[
2] # already have 22 blocks
last_block_signer_index = network.nodes[
expected_node_signer_id].last_signed_block_number
# assert signers order
self.assertEqual(last_block_signer_index, 22)
# get next ZETA SIGNERS by order
next_zeta_signers_order = round_2_signers_order[
3:3 + ZETA +
1] # -20 for first epoch +1 for maliciously skip block
# next_zeta_signers_order gossips need to wait
# maliciously skip block by next signer
network.nodes[
expected_node_signer_id].behaviour.malicious_skip_block = True
# perform in block step
Time.advance_to_next_timeslot()
helper.perform_in_block_single_step(BLOCK_TIME)
Time.advance_to_next_timeslot()
helper.perform_in_block_single_step(1)
# validate send gossips
# nodes may contain different count of gossips but MUST contain all ZETA validators keys for stop send -gossip
self.assertEqual(len(network.nodes[0].mempool.gossips), 5)
helper.list_validator(self, network.nodes, ['mempool.gossips.length'],
5)
def test_conflict_block_validator_processing(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()
network = Network()
helper = TestHelper(network)
helper.generate_nodes(private_keys, 19) # create validators
# generate blocks to new epoch
helper.perform_block_steps(5)
epoch_0_signers_order = list(
network.nodes[0].permissions.signers_indexes.values())[
0] # SECOND! EPOCH
next_malicious_signer_node_index = epoch_0_signers_order[
5] # block count
# set behavior for next validator is_malicious_excessive_block = True
network.nodes[
next_malicious_signer_node_index].behaviour.malicious_excessive_block_count = 1
# perform next one block step
helper.perform_block_steps(1)
# nodes MUST HAVE 2 conflict blocks
helper.list_validator(self, network.nodes,
['dag.blocks_by_number.length'],
7) # + 1 conflict
network.nodes[
next_malicious_signer_node_index].behaviour.malicious_excessive_block = False
# -- next validator MUST get two block conflicts
helper.perform_block_steps(1)
helper.list_validator(self, network.nodes,
['dag.blocks_by_number.system_txs'], 0)
# all nodes have all blocks test done
helper.list_validator(self, network.nodes,
['dag.blocks_by_number.length'], 8)
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 test_penalty(self):
dag = Dag(0)
epoch = Epoch(dag)
permissions = Permissions(epoch)
node_private = Private.generate()
initial_validators = Validators.read_genesis_validators_from_file()
genesis_hash = dag.genesis_block().get_hash()
last_block_number = Epoch.get_epoch_end_block_number(1)
prev_hash = ChainGenerator.fill_with_dummies(
dag, genesis_hash, range(1, last_block_number))
block = BlockFactory.create_block_with_timestamp(
[prev_hash], BLOCK_TIME * last_block_number)
tx = PenaltyTransaction()
tx.conflicts = [prev_hash]
tx.signature = Private.sign(tx.get_hash(), node_private)
block.system_txs = [tx]
signed_block = BlockFactory.sign_block(block, node_private)
dag.add_signed_block(last_block_number, signed_block)
initial_validators_order = permissions.get_signers_indexes(
genesis_hash)
# we substract two here: one because it is last but one block
# and one, because epoch starts from 1
validator_index_to_penalize = initial_validators_order[
last_block_number - 2]
resulting_validators = permissions.get_validators(block.get_hash())
self.assertNotEqual(len(initial_validators), len(resulting_validators))
initial_validators.pop(validator_index_to_penalize)
init_pubkeys = list(
map(lambda validator: validator.public_key, initial_validators))
result_pubkeys = list(
map(lambda validator: validator.public_key, resulting_validators))
self.assertEqual(init_pubkeys, result_pubkeys)
def test_stake_release_by_genesis_validator(self):
# base initialization
dag = Dag(0)
epoch = Epoch(dag)
permissions = Permissions(epoch)
node_private = Private.generate()
initial_validators = Validators.read_genesis_validators_from_file()
genesis_hash = dag.genesis_block().get_hash()
prev_hash = genesis_hash
for i in range(1, 9):
block = BlockFactory.create_block_with_timestamp([prev_hash],
BLOCK_TIME * i)
signed_block = BlockFactory.sign_block(block, node_private)
dag.add_signed_block(i, signed_block)
prev_hash = block.get_hash()
# get one of validators
genesis_validator = initial_validators[9]
# create stake release transaction for new stakeholder
tx_release = StakeReleaseTransaction()
tx_release.pubkey = Keys.to_bytes(genesis_validator.public_key)
tx_release.signature = Private.sign(tx_release.get_hash(),
node_private)
# append signed stake release transaction
block.system_txs.append(tx_release)
# sign block by one of validators
signed_block = BlockFactory.sign_block(block, node_private)
# add signed block to DAG
dag.add_signed_block(19, signed_block)
resulting_validators = permissions.get_validators(block.get_hash())
pub_keys = []
for validator in resulting_validators:
pub_keys.append(validator.public_key)
self.assertNotIn(genesis_validator.public_key, pub_keys)
def test_hold_stake(self):
dag = Dag(0)
epoch = Epoch(dag)
permissions = Permissions(epoch)
node_private = Private.generate()
initial_validators = Validators.read_genesis_validators_from_file()
genesis_hash = dag.genesis_block().get_hash()
prev_hash = genesis_hash
for i in range(1, 9):
block = BlockFactory.create_block_with_timestamp([prev_hash],
BLOCK_TIME * i)
signed_block = BlockFactory.sign_block(block, node_private)
dag.add_signed_block(i, signed_block)
prev_hash = block.get_hash()
block = BlockFactory.create_block_with_timestamp([prev_hash],
BLOCK_TIME * 9)
tx = StakeHoldTransaction()
tx.amount = 1000
node_new_private = Private.generate()
tx.pubkey = Private.publickey(node_new_private)
tx.signature = Private.sign(tx.get_hash(), node_new_private)
block.system_txs.append(tx)
signed_block = BlockFactory.sign_block(block, node_private)
dag.add_signed_block(9, signed_block)
resulting_validators = permissions.get_validators(block.get_hash())
pub_keys = []
for validator in resulting_validators:
pub_keys.append(validator.public_key)
self.assertIn(Private.publickey(node_new_private), pub_keys)
def __init__(self,
genesis_creation_time,
node_id,
network,
block_signer=BlockSigner(Private.generate()),
validators=Validators(),
behaviour=Behaviour(),
logger=DummyLogger()):
self.logger = logger
self.dag = Dag(genesis_creation_time)
self.epoch = Epoch(self.dag)
self.epoch.set_logger(self.logger)
self.permissions = Permissions(self.epoch, validators)
self.mempool = Mempool()
self.utxo = Utxo(self.logger)
self.conflict_watcher = ConflictWatcher(self.dag)
self.behaviour = behaviour
self.block_signer = block_signer
self.node_pubkey = Private.publickey(block_signer.private_key)
self.logger.info("Public key is %s",
Keys.to_visual_string(self.node_pubkey))
self.network = network
self.node_id = node_id
self.epoch_private_keys = [] # TODO make this single element
# self.epoch_private_keys where first element is era number, and second is key to reveal commited random
self.reveals_to_send = {}
self.sent_shares_epochs = [] # epoch hashes of secret shares
self.last_expected_timeslot = 0
self.last_signed_block_number = 0
self.tried_to_sign_current_block = False
self.owned_utxos = []
self.terminated = False
self.blocks_buffer = [
] # uses while receive block and do not have its ancestor in local dag (before verify)
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_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
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_release_stake(self):
# base initialization
dag = Dag(0)
epoch = Epoch(dag)
permissions = Permissions(epoch)
node_private = Private.generate()
initial_validators = Validators.read_genesis_validators_from_file()
genesis_hash = dag.genesis_block().get_hash()
prev_hash = genesis_hash
for i in range(1, 9):
block = BlockFactory.create_block_with_timestamp([prev_hash],
BLOCK_TIME * i)
signed_block = BlockFactory.sign_block(block, node_private)
dag.add_signed_block(i, signed_block)
prev_hash = block.get_hash()
block = BlockFactory.create_block_with_timestamp([prev_hash],
BLOCK_TIME * 9)
# create new node for stake hold
new_node_private = Private.generate()
new_node_public = Private.publickey(new_node_private)
# create transaction for stake hold for new node
tx_hold = StakeHoldTransaction()
tx_hold.amount = 2000
tx_hold.pubkey = Keys.to_bytes(new_node_public)
tx_hold.signature = Private.sign(tx_hold.get_hash(), new_node_private)
# append signed stake hold transaction
block.system_txs.append(tx_hold)
# sign block by one of validators
signed_block = BlockFactory.sign_block(block, node_private)
# add signed block to DAG
dag.add_signed_block(9, signed_block)
resulting_validators = permissions.get_validators(block.get_hash())
pub_keys = []
for validator in resulting_validators:
pub_keys.append(validator.public_key)
self.assertIn(new_node_public, pub_keys)
# add blocks for new epoch
for i in range(10, 18):
block = BlockFactory.create_block_with_timestamp([prev_hash],
BLOCK_TIME * i)
signed_block = BlockFactory.sign_block(block, node_private)
dag.add_signed_block(i, signed_block)
prev_hash = block.get_hash()
# create stake release transaction for new stakeholder
tx_release = StakeReleaseTransaction()
tx_release.pubkey = Keys.to_bytes(new_node_public)
tx_release.signature = Private.sign(tx_hold.get_hash(),
new_node_private)
# append signed stake release transaction
block.system_txs.append(tx_release)
# sign block by one of validators
signed_block = BlockFactory.sign_block(block, node_private)
# add signed block to DAG
dag.add_signed_block(19, signed_block)
# verify that new stake holder now is NOT in validators list (after stake release transaction signed by holder)
resulting_validators = permissions.get_validators(block.get_hash())
pub_keys = []
for validator in resulting_validators:
pub_keys.append(validator.public_key)
self.assertNotIn(new_node_public, pub_keys)
def test_remove_from_validators_by_penalty_gossip(self):
# base initialization
dag = Dag(0)
epoch = Epoch(dag)
permissions = Permissions(epoch)
node_private = Private.generate()
initial_validators = Validators.read_genesis_validators_from_file()
genesis_hash = dag.genesis_block().get_hash()
prev_hash = genesis_hash
for i in range(1, 9):
block = BlockFactory.create_block_with_timestamp([prev_hash],
BLOCK_TIME * i)
signed_block = BlockFactory.sign_block(block, node_private)
dag.add_signed_block(i, signed_block)
prev_hash = block.get_hash()
# get one of validators
genesis_validator_private = Private.generate()
genesis_validator_public = initial_validators[9].public_key
# put to 10 block gossip+ AND gossip- by one node
block = BlockFactory.create_block_with_timestamp([prev_hash],
BLOCK_TIME * 10)
gossip_negative_tx = NegativeGossipTransaction()
gossip_negative_tx.pubkey = genesis_validator_public
gossip_negative_tx.timestamp = Time.get_current_time()
gossip_negative_tx.number_of_block = 5
gossip_negative_tx.signature = Private.sign(
gossip_negative_tx.get_hash(), genesis_validator_private)
# create and add to block negative gossip
block.system_txs.append(gossip_negative_tx)
gossip_positive_tx = PositiveGossipTransaction()
gossip_positive_tx.pubkey = genesis_validator_public
gossip_positive_tx.timestamp = Time.get_current_time()
gossip_positive_tx.block_hash = dag.blocks_by_number[5][0].get_hash()
gossip_positive_tx.signature = Private.sign(
gossip_positive_tx.get_hash(), genesis_validator_private)
# create and add to block positive gossip for same number 5 block
block.system_txs.append(gossip_positive_tx)
signed_block = BlockFactory.sign_block(block,
genesis_validator_private)
dag.add_signed_block(10, signed_block)
prev_hash = block.get_hash()
# --------------------------------------------------
# put to 11 block penalty gossip
block = BlockFactory.create_block_with_timestamp([prev_hash],
BLOCK_TIME * 11)
penalty_gossip_tx = PenaltyGossipTransaction()
penalty_gossip_tx.timestamp = Time.get_current_time()
penalty_gossip_tx.conflicts = [
gossip_positive_tx.get_hash(),
gossip_negative_tx.get_hash()
]
# set genesis validator for sign penalty gossip
penalty_gossip_tx.signature = Private.sign(
penalty_gossip_tx.get_hash(), genesis_validator_private)
block.system_txs.append(penalty_gossip_tx)
signed_block = BlockFactory.sign_block(block,
genesis_validator_private)
dag.add_signed_block(11, signed_block)
prev_hash = block.get_hash()
# --------------------------------------------------
# verify that genesis node is steel in validators list
current_epoch_hash = epoch.get_epoch_hashes()
# for now we DO NOT NEED to recalculate validators (send genesis block hash)
resulting_validators = permissions.get_validators(
current_epoch_hash.get(prev_hash))
pub_keys = []
for validator in resulting_validators:
pub_keys.append(validator.public_key)
self.assertIn(genesis_validator_public, pub_keys)
# produce epoch till end
from chain.params import ROUND_DURATION
for i in range(12, (ROUND_DURATION * 6 + 4)):
block = BlockFactory.create_block_with_timestamp([prev_hash],
BLOCK_TIME * i)
signed_block = BlockFactory.sign_block(block, node_private)
dag.add_signed_block(i, signed_block)
prev_hash = block.get_hash()
# check for new epoch
self.assertTrue(epoch.is_new_epoch_upcoming(i))
self.assertTrue(epoch.current_epoch == 2)
# recalculate validators for last block hash
resulting_validators = permissions.get_validators(prev_hash)
pub_keys = []
for validator in resulting_validators:
pub_keys.append(validator.public_key)
self.assertNotIn(genesis_validator_public, pub_keys)
def test_network_methods(self):
private_keys = BlockSigners()
private_keys = private_keys.block_signers
validators = Validators()
network = Network()
node0 = Node(genesis_creation_time=1,
node_id=0,
network=network,
block_signer=private_keys[0],
validators=validators,
behaviour=Behaviour())
node1 = Node(genesis_creation_time=1,
node_id=1,
network=network,
block_signer=private_keys[1],
validators=validators,
behaviour=Behaviour())
node2 = Node(genesis_creation_time=1,
node_id=2,
network=network,
block_signer=private_keys[2],
validators=validators,
behaviour=Behaviour())
node3 = Node(genesis_creation_time=1,
node_id=3,
network=network,
block_signer=private_keys[3],
validators=validators,
behaviour=Behaviour())
node4 = Node(genesis_creation_time=1,
node_id=4,
network=network,
block_signer=private_keys[4],
validators=validators,
behaviour=Behaviour())
network.register_node(node0)
network.register_node(node1)
network.register_node(node2)
network.register_node(node3)
network.register_node(node4)
self.assertEqual(len(network.nodes) == 5, True)
network.move_nodes_to_group(
0, [node0, node1]) # create group 0 with nodes 0, 1
network.move_nodes_to_group(
1, [node2, node3, node4]) # create group 1 with nodes 2, 3, 4
self.assertEqual(len(network.groups) == 2, True)
self.assertEqual(len(network.groups[0]) == 2, True)
self.assertEqual(len(network.groups[1]) == 3, True)
network.merge_all_groups() # test marge groups
self.assertEqual(len(network.nodes) == 5, True)
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_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
