def test_ancestry(self):
dag = Dag(0)
private = Private.generate()
block1 = BlockFactory.create_block_with_timestamp(
[dag.genesis_block().get_hash()], BLOCK_TIME)
signed_block1 = BlockFactory.sign_block(block1, private)
dag.add_signed_block(1, signed_block1)
block2 = BlockFactory.create_block_with_timestamp([block1.get_hash()],
BLOCK_TIME * 2)
signed_block2 = BlockFactory.sign_block(block2, private)
dag.add_signed_block(2, signed_block2)
block3 = BlockFactory.create_block_with_timestamp([block2.get_hash()],
BLOCK_TIME * 3)
signed_block3 = BlockFactory.sign_block(block3, private)
dag.add_signed_block(3, signed_block3)
# alternative chain
other_block2 = BlockFactory.create_block_with_timestamp(
[block1.get_hash()], BLOCK_TIME * 2 + 1)
other_signed_block2 = BlockFactory.sign_block(other_block2, private)
dag.add_signed_block(2, other_signed_block2)
# alternative chain
other_block3 = BlockFactory.create_block_with_timestamp(
[other_block2.get_hash()], BLOCK_TIME * 3 + 1)
other_signed_block3 = BlockFactory.sign_block(other_block3, private)
dag.add_signed_block(3, other_signed_block3)
self.assertEqual(
dag.is_ancestor(other_block3.get_hash(), other_block2.get_hash()),
True)
self.assertEqual(
dag.is_ancestor(other_block3.get_hash(), block2.get_hash()), False)
def insert_dummy(dag, prev_hashes, position):
dummy_private = Private.generate()
dummy_time_offset = len(dag.blocks_by_number.get(position, []))
assert dummy_time_offset <= BLOCK_TIME, "This much blocks in one timeslot may lead to problems"
block = BlockFactory.create_block_with_timestamp(
prev_hashes, BLOCK_TIME * position + dummy_time_offset)
signed_block = BlockFactory.sign_block(block, dummy_private)
dag.add_signed_block(position, signed_block)
return block.get_hash()
def insert_dummy_with_payments(dag, prev_hashes, payments, position):
dummy_private = Private.generate()
dummy_time_offset = len(dag.blocks_by_number.get(position, []))
assert dummy_time_offset <= BLOCK_TIME, "This much blocks in one timeslot may lead to problems"
block = BlockFactory.create_block_with_timestamp(
prev_hashes, BLOCK_TIME * position + dummy_time_offset)
block_reward = TransactionFactory.create_block_reward(
urandom(32), position)
block.payment_txs = [block_reward] + payments
signed_block = BlockFactory.sign_block(block, dummy_private)
dag.add_signed_block(position, signed_block)
return block.get_hash(), block_reward.get_hash()
def test_chain_length(self):
dag = Dag(0)
private = Private.generate()
block1 = BlockFactory.create_block_with_timestamp(
[dag.genesis_block().get_hash()], BLOCK_TIME)
signed_block1 = BlockFactory.sign_block(block1, private)
dag.add_signed_block(1, signed_block1)
block2 = BlockFactory.create_block_with_timestamp([block1.get_hash()],
BLOCK_TIME * 2)
signed_block2 = BlockFactory.sign_block(block2, private)
dag.add_signed_block(2, signed_block2)
block3 = BlockFactory.create_block_with_timestamp([block2.get_hash()],
BLOCK_TIME * 3)
signed_block3 = BlockFactory.sign_block(block3, private)
dag.add_signed_block(3, signed_block3)
# alternative chain
other_block2 = BlockFactory.create_block_with_timestamp(
[block1.get_hash()], BLOCK_TIME * 2 + 1)
other_signed_block2 = BlockFactory.sign_block(other_block2, private)
dag.add_signed_block(2, other_signed_block2)
self.assertEqual(
dag.calculate_chain_length(other_block2.get_hash(),
dag.genesis_hash()), 3)
self.assertEqual(
dag.calculate_chain_length(block3.get_hash(), dag.genesis_hash()),
4)
def test_find_epoch_hash_for_block(self):
dag = Dag(0)
epoch = Epoch(dag)
genesis_hash = dag.genesis_block().get_hash()
genesis_epoch_hash = epoch.find_epoch_hash_for_block(genesis_hash)
self.assertEqual(genesis_hash, genesis_epoch_hash)
block = BlockFactory.create_block_with_timestamp([genesis_hash],
BLOCK_TIME)
signed_block = BlockFactory.sign_block(block, Private.generate())
dag.add_signed_block(1, signed_block)
first_block_hash = block.get_hash()
first_epoch_hash = epoch.find_epoch_hash_for_block(first_block_hash)
self.assertEqual(genesis_hash, first_epoch_hash)
def test_merge_in_merge(self):
dag = Dag(0)
genesis_hash = dag.genesis_block().get_hash()
ChainGenerator.fill_with_dummies_and_skips(dag, genesis_hash,
range(1, 5), [1, 3])
second_block = dag.blocks_by_number[2][0].get_hash()
ChainGenerator.fill_with_dummies_and_skips(dag, second_block,
range(3, 4), [])
tops = dag.get_top_hashes()
merging_block = BlockFactory.create_block_with_timestamp(
tops, BLOCK_TIME * 5)
merging_signed_block = BlockFactory.sign_block(merging_block,
Private.generate())
dag.add_signed_block(5, merging_signed_block)
ChainGenerator.fill_with_dummies_and_skips(dag, genesis_hash,
range(1, 7), [2, 3, 4, 5])
tops = dag.get_top_hashes()
merging_block = BlockFactory.create_block_with_timestamp(
tops, BLOCK_TIME * 7)
merging_signed_block = BlockFactory.sign_block(merging_block,
Private.generate())
dag.add_signed_block(7, merging_signed_block)
# DagVisualizer.visualize(dag, True)
iterator = MergingIter(dag, merging_block.get_hash())
#shortest chain goes last
# 3 and 4 are swapped because 4 has a priority
#TODO But is it okay? Maybe we should sometimes give priority to earlier blocks if equal?1
self.assertEqual(iterator.next().get_hash(),
dag.blocks_by_number[7][0].get_hash())
self.assertEqual(iterator.next().get_hash(),
dag.blocks_by_number[6][0].get_hash())
self.assertEqual(iterator.next().get_hash(),
dag.blocks_by_number[1][0].get_hash())
self.assertEqual(iterator.next().get_hash(),
dag.blocks_by_number[5][0].get_hash())
self.assertEqual(iterator.next().get_hash(),
dag.blocks_by_number[3][0].get_hash())
self.assertEqual(iterator.next().get_hash(),
dag.blocks_by_number[4][0].get_hash())
self.assertEqual(iterator.next().get_hash(),
dag.blocks_by_number[2][0].get_hash())
self.assertEqual(iterator.next().get_hash(),
dag.blocks_by_number[0][0].get_hash())
def test_simple_merge(self):
dag = Dag(0)
genesis_hash = dag.genesis_block().get_hash()
ChainGenerator.fill_with_dummies_and_skips(dag, genesis_hash,
range(1, 10), [2, 5, 7, 8])
first_block = dag.blocks_by_number[1][0].get_hash()
ChainGenerator.fill_with_dummies_and_skips(dag, first_block,
range(2, 10),
[3, 4, 6, 7, 8, 9])
second_block = dag.blocks_by_number[2][0].get_hash()
ChainGenerator.fill_with_dummies_and_skips(dag, second_block,
range(3, 10),
[3, 4, 5, 6, 9])
hanging_tips = dag.get_top_hashes()
merging_block = BlockFactory.create_block_with_timestamp(
hanging_tips, BLOCK_TIME * 10)
merging_signed_block = BlockFactory.sign_block(merging_block,
Private.generate())
dag.add_signed_block(10, merging_signed_block)
# DagVisualizer.visualize(dag, True)
iterator = MergingIter(dag, merging_block.get_hash())
self.assertEqual(iterator.next().get_hash(), merging_block.get_hash())
self.assertEqual(iterator.next().get_hash(),
dag.blocks_by_number[5][0].get_hash())
self.assertEqual(iterator.next().get_hash(),
dag.blocks_by_number[8][0].get_hash())
self.assertEqual(iterator.next().get_hash(),
dag.blocks_by_number[7][0].get_hash())
self.assertEqual(iterator.next().get_hash(), dag.blocks_by_number[2]
[0].get_hash()) #TODO find out why is this 2 here
self.assertEqual(iterator.next().get_hash(),
dag.blocks_by_number[9][0].get_hash())
self.assertEqual(iterator.next().get_hash(),
dag.blocks_by_number[6][0].get_hash())
self.assertEqual(iterator.next().get_hash(),
dag.blocks_by_number[4][0].get_hash())
self.assertEqual(iterator.next().get_hash(),
dag.blocks_by_number[3][0].get_hash())
self.assertEqual(iterator.next().get_hash(),
dag.blocks_by_number[1][0].get_hash())
self.assertEqual(iterator.next().get_hash(),
dag.blocks_by_number[0][0].get_hash())
def test_parse_pack_gossip_positive(self):
private = Private.generate()
original = PositiveGossipTransaction()
original.pubkey = Private.publickey(private)
original.timestamp = Time.get_current_time()
block = BlockFactory.create_block_with_timestamp(
[], timestamp=original.timestamp)
original.block_hash = BlockFactory.sign_block(block,
private).get_hash()
original.signature = Private.sign(original.get_hash(), private)
raw = original.pack()
restored = PositiveGossipTransaction()
restored.parse(raw)
self.assertEqual(original.get_hash(), restored.get_hash())
def test_iterator(self):
dag = Dag(0)
private = Private.generate()
block1 = BlockFactory.create_block_with_timestamp(
[dag.genesis_block().get_hash()], BLOCK_TIME)
signed_block1 = BlockFactory.sign_block(block1, private)
dag.add_signed_block(1, signed_block1)
block2 = BlockFactory.create_block_with_timestamp([block1.get_hash()],
BLOCK_TIME * 2)
signed_block2 = BlockFactory.sign_block(block2, private)
dag.add_signed_block(2, signed_block2)
block3 = BlockFactory.create_block_with_timestamp([block2.get_hash()],
BLOCK_TIME * 3)
signed_block3 = BlockFactory.sign_block(block3, private)
dag.add_signed_block(3, signed_block3)
# alternative chain
other_block2 = BlockFactory.create_block_with_timestamp(
[block1.get_hash()], BLOCK_TIME * 2 + 1)
other_signed_block2 = BlockFactory.sign_block(other_block2, private)
dag.add_signed_block(2, other_signed_block2)
# intentionally skipped block
# alternative chain
other_block4 = BlockFactory.create_block_with_timestamp(
[other_block2.get_hash()], BLOCK_TIME * 3 + 1)
other_signed_block4 = BlockFactory.sign_block(other_block4, private)
dag.add_signed_block(4, other_signed_block4)
chain_iter = ChainIter(dag, block3.get_hash())
self.assertEqual(chain_iter.next().block.get_hash(), block3.get_hash())
self.assertEqual(chain_iter.next().block.get_hash(), block2.get_hash())
self.assertEqual(chain_iter.next().block.get_hash(), block1.get_hash())
chain_iter = ChainIter(dag, other_block4.get_hash())
self.assertEqual(chain_iter.next().block.get_hash(),
other_block4.get_hash())
self.assertEqual(chain_iter.next(),
None) # detect intentionally skipped block
self.assertEqual(chain_iter.next().block.get_hash(),
other_block2.get_hash())
self.assertEqual(chain_iter.next().block.get_hash(), block1.get_hash())
def fill_with_dummies_and_skips(dag,
prev_hash,
range,
indices_to_skip,
dummy_private=Private.generate()):
prev_hash_number = dag.get_block_number(prev_hash)
assert range.start > prev_hash_number, "First block timeslot should be later than anchoring previous block"
# dummy_private = Private.generate()
for i in range:
if i in indices_to_skip: continue
dummy_time_offset = len(dag.blocks_by_number.get(i, []))
block = BlockFactory.create_block_with_timestamp(
[prev_hash], BLOCK_TIME * i + dummy_time_offset)
signed_block = BlockFactory.sign_block(block, dummy_private)
dag.add_signed_block(i, signed_block)
prev_hash = block.get_hash()
return prev_hash
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 generate_two_chains(length):
dag = Dag(0)
private = Private.generate()
prev_hash = dag.genesis_block().get_hash()
for i in range(1, length + 1):
block = BlockFactory.create_block_with_timestamp([prev_hash],
BLOCK_TIME * i)
signed_block = BlockFactory.sign_block(block, private)
dag.add_signed_block(i, signed_block)
prev_hash = block.get_hash()
prev_hash = dag.blocks_by_number[1][0].get_hash()
for i in range(2, length + 1): # intentionally one block less
if i == 4: continue # intentionally skipped block
block = BlockFactory.create_block_with_timestamp(
[prev_hash], BLOCK_TIME * i + 1)
signed_block = BlockFactory.sign_block(block, private)
dag.add_signed_block(i, signed_block)
prev_hash = block.get_hash()
return dag
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_top_blocks(self):
dag = Dag(0)
epoch = Epoch(dag)
private = Private.generate()
epoch_hash = dag.genesis_block().get_hash()
self.assertEqual(dag.genesis_block().get_hash(),
list(epoch.get_epoch_hashes().keys())[0])
self.assertEqual(dag.genesis_block().get_hash(),
list(epoch.get_epoch_hashes().values())[0])
block1 = BlockFactory.create_block_with_timestamp(
[dag.genesis_block().get_hash()], BLOCK_TIME)
signed_block1 = BlockFactory.sign_block(block1, private)
dag.add_signed_block(1, signed_block1)
self.assertEqual(block1.get_hash(),
list(epoch.get_epoch_hashes().keys())[0])
self.assertEqual(epoch_hash,
list(epoch.get_epoch_hashes().values())[0])
prev_hash = block1.get_hash()
epoch_length = ROUND_DURATION * 6 + 1
for i in range(2, epoch_length + 1):
block = BlockFactory.create_block_with_timestamp([prev_hash],
BLOCK_TIME * i)
signed_block = BlockFactory.sign_block(block, private)
dag.add_signed_block(i, signed_block)
prev_hash = block.get_hash()
if epoch.is_new_epoch_upcoming(epoch_length + 1):
epoch.accept_tops_as_epoch_hashes()
top_block_hash = dag.blocks_by_number[epoch_length][0].get_hash()
epoch_hash = dag.blocks_by_number[epoch_length][0].get_hash()
self.assertEqual(top_block_hash,
list(epoch.get_epoch_hashes().keys())[0])
self.assertEqual(epoch_hash,
list(epoch.get_epoch_hashes().values())[0])
epoch2 = epoch_length * 2 + 1
for i in range(epoch_length + 1, epoch2):
block = BlockFactory.create_block_with_timestamp([prev_hash],
BLOCK_TIME * i)
signed_block = BlockFactory.sign_block(block, private)
dag.add_signed_block(i, signed_block)
prev_hash = block.get_hash()
if epoch.is_new_epoch_upcoming(epoch2):
epoch.accept_tops_as_epoch_hashes()
top_block_hash = dag.blocks_by_number[epoch2 - 1][0].get_hash()
epoch_hash = dag.blocks_by_number[epoch2 - 1][0].get_hash()
self.assertEqual(top_block_hash,
list(epoch.get_epoch_hashes().keys())[0])
self.assertEqual(epoch_hash,
list(epoch.get_epoch_hashes().values())[0])
def test_private_keys_extraction(self):
dag = Dag(0)
epoch = Epoch(dag)
node_private = Private.generate()
prev_hash = dag.genesis_block().get_hash()
round_start, round_end = Epoch.get_round_bounds(1, Round.PRIVATE)
for i in range(1, round_start):
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()
generated_private_keys = []
for i in range(round_start,
round_end): # intentionally skip last block of round
generated_private = Private.generate()
generated_private_keys.append(Keys.to_bytes(generated_private))
private_key_tx = PrivateKeyTransaction()
private_key_tx.key = Keys.to_bytes(generated_private)
block = Block()
block.system_txs = [private_key_tx]
block.prev_hashes = dag.get_top_blocks_hashes()
block.timestamp = i * BLOCK_TIME
signed_block = BlockFactory.sign_block(block, node_private)
dag.add_signed_block(i, signed_block)
prev_hash = block.get_hash()
ChainGenerator.fill_with_dummies(dag, prev_hash,
Epoch.get_round_range(1, Round.FINAL))
epoch_hash = dag.blocks_by_number[ROUND_DURATION * 6 + 1][0].get_hash()
extracted_privates = epoch.get_private_keys_for_epoch(epoch_hash)
for i in range(0, ROUND_DURATION - 1):
self.assertEqual(extracted_privates[i], generated_private_keys[i])
def test_getting_tx_by_hash(self):
dag = Dag(0)
private = Private.generate()
block1 = BlockFactory.create_block_with_timestamp(
[dag.genesis_block().get_hash()], BLOCK_TIME)
tx1 = TransactionFactory.create_negative_gossip_transaction(1, private)
tx2 = TransactionFactory.create_positive_gossip_transaction(
block1.get_hash(), private)
tx3 = TransactionFactory.create_penalty_gossip_transaction(
{tx1.get_hash(): tx2.get_hash()}, private)
not_appended_tx = TransactionFactory.create_public_key_transaction(
generated_private=Private.generate(),
epoch_hash=sha256(b'epoch_hash').digest(),
validator_index=1,
node_private=private)
block1.system_txs.append(tx1)
block1.system_txs.append(tx2)
block1.system_txs.append(tx3)
signed_block1 = BlockFactory.sign_block(block1, private)
dag.add_signed_block(1, signed_block1)
self.assertTrue(
set(dag.transactions_by_hash).issuperset({tx1.get_hash(): tx1}))
self.assertTrue(
set(dag.transactions_by_hash).issuperset({tx2.get_hash(): tx2}))
self.assertTrue(
set(dag.transactions_by_hash).issuperset({tx3.get_hash(): tx3}))
self.assertFalse(
set(dag.transactions_by_hash).issuperset(
{not_appended_tx.get_hash(): not_appended_tx}))
# test dag.tx_by_hash getter
self.assertTrue(dag.get_tx_by_hash(tx1.get_hash()) == tx1)
self.assertTrue(dag.get_tx_by_hash(tx2.get_hash()) == tx2)
self.assertTrue(dag.get_tx_by_hash(tx3.get_hash()) == tx3)
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 test_pack_parse_penalty_gossip_transaction(self):
private = Private.generate()
original = PenaltyGossipTransaction()
original.timestamp = Time.get_current_time()
block = BlockFactory.create_block_with_timestamp(
[], timestamp=original.timestamp)
gossip_positive_tx = PositiveGossipTransaction()
gossip_positive_tx.pubkey = Private.publickey(private)
gossip_positive_tx.timestamp = Time.get_current_time()
gossip_positive_tx.block_hash = BlockFactory.sign_block(
block, private).get_hash()
gossip_positive_tx.signature = Private.sign(original.get_hash(),
private)
gossip_negative_tx = NegativeGossipTransaction()
gossip_negative_tx.pubkey = Private.publickey(private)
gossip_negative_tx.timestamp = Time.get_current_time()
gossip_negative_tx.number_of_block = 47
gossip_negative_tx.signature = Private.sign(original.get_hash(),
private)
original.conflicts = [
gossip_positive_tx.get_hash(),
gossip_negative_tx.get_hash()
]
original.signature = Private.sign(original.get_hash(), private)
original.block_hash = BlockFactory.sign_block(block,
private).get_hash()
raw = original.pack()
restored = PenaltyGossipTransaction()
restored.parse(raw)
self.assertEqual(original.get_hash(), restored.get_hash())
def test_zeta_calculation(self):
dag = Dag(0)
private = Private.generate()
prev_hash = dag.genesis_block().get_hash()
for i in range(1, 3):
block = BlockFactory.create_block_with_timestamp([prev_hash],
BLOCK_TIME * i)
signed_block = BlockFactory.sign_block(block, private)
dag.add_signed_block(i, signed_block)
prev_hash = block.get_hash()
#skip 3 blocks
for i in range(6, 7):
block = BlockFactory.create_block_with_timestamp([prev_hash],
BLOCK_TIME * i)
signed_block = BlockFactory.sign_block(block, private)
dag.add_signed_block(i, signed_block)
prev_hash = block.get_hash()
for i in range(10, 12):
block = BlockFactory.create_block_with_timestamp([prev_hash],
BLOCK_TIME * i)
signed_block = BlockFactory.sign_block(block, private)
dag.add_signed_block(i, signed_block)
prev_hash = block.get_hash()
prev_hash = dag.blocks_by_number[1][0].get_hash()
for i in range(2, 12):
if i == 3: continue
block = BlockFactory.create_block_with_timestamp(
[prev_hash], BLOCK_TIME * i + 1)
signed_block = BlockFactory.sign_block(block, private)
dag.add_signed_block(i, signed_block)
prev_hash = block.get_hash()
immutability = Immutability(dag)
# zeta = immutability.calculate_zeta(dag.blocks_by_number[2][0].get_hash())
# self.assertEqual(zeta, -2)
zeta = immutability.calculate_zeta(
dag.blocks_by_number[6][1].get_hash())
self.assertEqual(zeta, 1)
def test_storing_tx_by_hash(self):
dag = Dag(0)
private0 = Private.generate()
private1 = Private.generate()
private2 = Private.generate()
# add block 1
block1 = BlockFactory.create_block_with_timestamp(
[dag.genesis_block().get_hash()], BLOCK_TIME)
signed_block1 = BlockFactory.sign_block(block1, private0)
dag.add_signed_block(1, signed_block1)
# check transactions in dag.transactions_by_hash for empty
self.assertTrue(len(dag.transactions_by_hash) == 0)
# add block 2
block2 = BlockFactory.create_block_with_timestamp([block1.get_hash()],
BLOCK_TIME)
# add penalty gossip case by tx in block
tx1 = TransactionFactory.create_negative_gossip_transaction(
1, private1)
tx2 = TransactionFactory.create_positive_gossip_transaction(
block2.get_hash(), private1)
block2.system_txs.append(tx1)
block2.system_txs.append(tx2)
# --------------------------------------
signed_block2 = BlockFactory.sign_block(block2, private1)
dag.add_signed_block(2, signed_block2)
# check transactions in dag.transactions_by_hash
self.assertTrue(
set(dag.transactions_by_hash).issuperset({tx1.get_hash(): tx1}))
self.assertTrue(
set(dag.transactions_by_hash).issuperset({tx2.get_hash(): tx2}))
block3 = BlockFactory.create_block_with_timestamp([block2.get_hash()],
BLOCK_TIME)
signed_block3 = BlockFactory.sign_block(block3, private2)
dag.add_signed_block(3, signed_block3)
# check transactions in dag.transactions_by_hash
self.assertTrue(
set(dag.transactions_by_hash).issuperset({tx1.get_hash(): tx1}))
self.assertTrue(
set(dag.transactions_by_hash).issuperset({tx2.get_hash(): tx2}))
def test_top_blocks(self):
dag = Dag(0)
private = Private.generate()
block1 = BlockFactory.create_block_with_timestamp(
[dag.genesis_block().get_hash()], BLOCK_TIME)
signed_block1 = BlockFactory.sign_block(block1, private)
dag.add_signed_block(1, signed_block1)
block2 = BlockFactory.create_block_with_timestamp([block1.get_hash()],
BLOCK_TIME * 2)
signed_block2 = BlockFactory.sign_block(block2, private)
dag.add_signed_block(2, signed_block2)
block3 = BlockFactory.create_block_with_timestamp([block1.get_hash()],
BLOCK_TIME * 3)
signed_block3 = BlockFactory.sign_block(block3, private)
dag.add_signed_block(3, signed_block3)
top_hashes = dag.get_top_blocks_hashes()
self.assertEqual(top_hashes[0], block2.get_hash())
self.assertEqual(top_hashes[1], block3.get_hash())
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_secret_sharing_rounds(self):
dag = Dag(0)
epoch = Epoch(dag)
dummy_private = Private.generate()
signers = []
for i in range(0, ROUND_DURATION + 1):
signers.append(Private.generate())
private_keys = []
block_number = 1
genesis_hash = dag.genesis_block().get_hash()
prev_hash = genesis_hash
signer_index = 0
for i in Epoch.get_round_range(1, Round.PUBLIC):
private = Private.generate()
private_keys.append(private)
signer = signers[signer_index]
pubkey_tx = PublicKeyTransaction()
pubkey_tx.generated_pubkey = Private.publickey(private)
pubkey_tx.pubkey_index = signer_index
pubkey_tx.signature = Private.sign(
pubkey_tx.get_signing_hash(genesis_hash), signer)
block = Block()
block.timestamp = i * BLOCK_TIME
block.prev_hashes = [prev_hash]
block.system_txs = [pubkey_tx]
signed_block = BlockFactory.sign_block(block, signer)
dag.add_signed_block(i, signed_block)
signer_index += 1
prev_hash = block.get_hash()
prev_hash = ChainGenerator.fill_with_dummies(
dag, prev_hash, Epoch.get_round_range(1, Round.COMMIT))
public_keys = []
for private in private_keys:
public_keys.append(Private.publickey(private))
randoms_list = []
expected_random_pieces = []
for i in Epoch.get_round_range(1, Round.SECRETSHARE):
random_bytes = os.urandom(32)
random_value = int.from_bytes(random_bytes, byteorder='big')
split_random_tx = SplitRandomTransaction()
splits = split_secret(random_bytes, 2, 3)
encoded_splits = encode_splits(splits, public_keys)
split_random_tx.pieces = encoded_splits
split_random_tx.pubkey_index = 0
expected_random_pieces.append(split_random_tx.pieces)
split_random_tx.signature = Private.sign(pubkey_tx.get_hash(),
dummy_private)
block = Block()
block.timestamp = i * BLOCK_TIME
block.prev_hashes = [prev_hash]
block.system_txs = [split_random_tx]
signed_block = BlockFactory.sign_block(block, dummy_private)
dag.add_signed_block(i, signed_block)
randoms_list.append(random_value)
prev_hash = block.get_hash()
expected_seed = sum_random(randoms_list)
prev_hash = ChainGenerator.fill_with_dummies(
dag, prev_hash, Epoch.get_round_range(1, Round.REVEAL))
signer_index = 0
private_key_index = 0
raw_private_keys = []
for i in Epoch.get_round_range(1, Round.PRIVATE):
private_key_tx = PrivateKeyTransaction()
private_key_tx.key = Keys.to_bytes(private_keys[private_key_index])
raw_private_keys.append(private_key_tx.key)
signer = signers[signer_index]
block = Block()
block.system_txs = [private_key_tx]
block.prev_hashes = [prev_hash]
block.timestamp = block_number * BLOCK_TIME
signed_block = BlockFactory.sign_block(block, signer)
dag.add_signed_block(i, signed_block)
signer_index += 1
private_key_index += 1
prev_hash = block.get_hash()
prev_hash = ChainGenerator.fill_with_dummies(
dag, prev_hash, Epoch.get_round_range(1, Round.FINAL))
top_block_hash = dag.get_top_blocks_hashes()[0]
random_splits = epoch.get_random_splits_for_epoch(top_block_hash)
self.assertEqual(expected_random_pieces, random_splits)
restored_randoms = []
for i in range(0, len(random_splits)):
random = decode_random(random_splits[i],
Keys.list_from_bytes(raw_private_keys))
restored_randoms.append(random)
self.assertEqual(randoms_list, restored_randoms)
seed = epoch.extract_shared_random(top_block_hash)
self.assertEqual(expected_seed, seed)
def test_confirmations_calculation(self):
dag = Dag(0)
private = Private.generate()
prev_hash = dag.genesis_block().get_hash()
for i in range(1, 9):
if i == 5 or i == 7: continue
block = BlockFactory.create_block_with_timestamp([prev_hash],
BLOCK_TIME * i)
signed_block = BlockFactory.sign_block(block, private)
dag.add_signed_block(i, signed_block)
prev_hash = block.get_hash()
prev_hash = dag.blocks_by_number[1][0].get_hash()
for i in range(2, 5):
if i == 3: continue
block = BlockFactory.create_block_with_timestamp(
[prev_hash], BLOCK_TIME * i + 1)
signed_block = BlockFactory.sign_block(block, private)
dag.add_signed_block(i, signed_block)
prev_hash = block.get_hash()
immutability = Immutability(dag)
# first branch check
confirmations = immutability.calculate_confirmations(
dag.blocks_by_number[8][0].get_hash())
self.assertEqual(confirmations, 0)
skipped_block = SkippedBlock(dag.blocks_by_number[8][0].get_hash(),
backstep_count=1)
confirmations = immutability.calculate_skipped_block_confirmations(
skipped_block)
self.assertEqual(confirmations, 1)
confirmations = immutability.calculate_confirmations(
dag.blocks_by_number[6][0].get_hash())
self.assertEqual(confirmations, 1)
skipped_block = SkippedBlock(dag.blocks_by_number[6][0].get_hash(),
backstep_count=1)
confirmations = immutability.calculate_skipped_block_confirmations(
skipped_block)
self.assertEqual(confirmations, 2)
confirmations = immutability.calculate_confirmations(
dag.blocks_by_number[4][0].get_hash())
self.assertEqual(confirmations, 2)
# second branch check
confirmations = immutability.calculate_confirmations(
dag.blocks_by_number[4][1].get_hash())
self.assertEqual(confirmations, 0)
skipped_block = SkippedBlock(dag.blocks_by_number[4][1].get_hash(),
backstep_count=1)
confirmations = immutability.calculate_skipped_block_confirmations(
skipped_block)
self.assertEqual(confirmations, 1)
confirmations = immutability.calculate_confirmations(
dag.blocks_by_number[2][1].get_hash())
self.assertEqual(confirmations, 1)
# common ancestor
# four existing blocks in the following five slots
confirmations = immutability.calculate_confirmations(
dag.blocks_by_number[1][0].get_hash())
self.assertEqual(confirmations, 4)
def test_commit_reveal(self):
dag = Dag(0)
epoch = Epoch(dag)
private = Private.generate()
prev_hash = ChainGenerator.fill_with_dummies(
dag,
dag.genesis_block().get_hash(),
Epoch.get_round_range(1, Round.PUBLIC))
randoms_list = []
for i in Epoch.get_round_range(1, Round.COMMIT):
random_value = int.from_bytes(os.urandom(32), byteorder='big')
randoms_list.append(random_value)
expected_seed = sum_random(randoms_list)
reveals = []
epoch_hash = dag.genesis_block().get_hash()
for i in Epoch.get_round_range(1, Round.COMMIT):
rand = randoms_list.pop()
random_bytes = rand.to_bytes(32, byteorder='big')
commit, reveal = TestEpoch.create_dummy_commit_reveal(
random_bytes, epoch_hash)
commit_block = BlockFactory.create_block_with_timestamp(
[prev_hash], i * BLOCK_TIME)
commit_block.system_txs = [commit]
signed_block = BlockFactory.sign_block(commit_block, private)
dag.add_signed_block(i, signed_block)
prev_hash = commit_block.get_hash()
reveals.append(reveal)
revealing_key = Keys.from_bytes(reveal.key)
encrypted_bytes = Public.encrypt(random_bytes,
Private.publickey(revealing_key))
decrypted_bytes = Private.decrypt(encrypted_bytes, revealing_key)
# TODO check if encryption decryption can work million times in a row
self.assertEqual(decrypted_bytes, random_bytes)
revealed_value = Private.decrypt(commit.rand, revealing_key)
self.assertEqual(revealed_value, random_bytes)
# self.assertEqual(len(reveals), ROUND_DURATION)
prev_hash = ChainGenerator.fill_with_dummies(
dag, prev_hash, Epoch.get_round_range(1, Round.SECRETSHARE))
for i in Epoch.get_round_range(1, Round.REVEAL):
reveal_block = BlockFactory.create_block_with_timestamp(
[prev_hash], i * BLOCK_TIME)
reveal_block.system_txs = [reveals.pop()]
signed_block = BlockFactory.sign_block(reveal_block, private)
dag.add_signed_block(i, signed_block)
prev_hash = reveal_block.get_hash()
prev_hash = ChainGenerator.fill_with_dummies(
dag, prev_hash, Epoch.get_round_range(1, Round.PRIVATE))
prev_hash = ChainGenerator.fill_with_dummies(
dag, prev_hash, Epoch.get_round_range(1, Round.FINAL))
seed = epoch.reveal_commited_random(prev_hash)
self.assertEqual(expected_seed, seed)
def sign_block(self, current_block_number):
current_round_type = self.epoch.get_round_by_block_number(
current_block_number)
epoch_number = Epoch.get_epoch_number(current_block_number)
system_txs = self.get_system_transactions_for_signing(
current_round_type)
payment_txs = self.get_payment_transactions_for_signing(
current_block_number)
tops = self.dag.get_top_blocks_hashes()
chosen_top = self.dag.get_longest_chain_top(tops)
conflicting_tops = [top for top in tops if top != chosen_top]
current_top_blocks = [
chosen_top
] + conflicting_tops # first link in dag is not considered conflict, the rest is.
if self.behaviour.off_malicious_links_to_wrong_blocks:
current_top_blocks = []
all_hashes = list(self.dag.blocks_by_hash.keys())
for _ in range(random.randint(1, 3)):
block_hash = random.choice(all_hashes)
current_top_blocks.append(block_hash)
self.logger.info(
"Maliciously connecting block at slot %s to random hashes",
current_block_number)
block = BlockFactory.create_block_dummy(current_top_blocks)
block.system_txs = system_txs
block.payment_txs = payment_txs
signed_block = BlockFactory.sign_block(block,
self.block_signer.private_key)
if self.behaviour.malicious_block_broadcast_delay > 0:
self.behaviour.block_to_delay_broadcasting = signed_block
return # don't do broadcasting, wait a few timeslots1
self.dag.add_signed_block(current_block_number, signed_block)
self.utxo.apply_payments(payment_txs)
self.conflict_watcher.on_new_block_by_validator(
block.get_hash(), epoch_number, self.node_pubkey)
if not self.behaviour.transport_cancel_block_broadcast: # behaviour flag for cancel block broadcast
self.logger.debug("Broadcasting signed block number %s",
current_block_number)
self.network.broadcast_block(self.node_id, signed_block.pack())
else:
self.logger.info(
"Created but maliciously skipped broadcasted block")
if self.behaviour.malicious_excessive_block_count > 0:
additional_block_timestamp = block.timestamp + 1
additional_block = BlockFactory.create_block_with_timestamp(
current_top_blocks, additional_block_timestamp)
additional_block.system_txs = block.system_txs
additional_block.payment_txs = block.payment_txs
signed_add_block = BlockFactory.sign_block(
additional_block, self.block_signer.private_key)
self.dag.add_signed_block(current_block_number, signed_add_block)
self.conflict_watcher.on_new_block_by_validator(
signed_add_block.get_hash(), epoch_number,
self.node_pubkey) #mark our own conflict for consistency
self.logger.info("Sending additional block")
self.network.broadcast_block(self.node_id, signed_add_block.pack())
self.behaviour.malicious_excessive_block_count -= 1
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)