def create_negative_gossip_transaction(number_of_block, node_private):
tx = NegativeGossipTransaction()
tx.timestamp = Time.get_current_time()
tx.number_of_block = number_of_block
tx.pubkey = Private.publickey(node_private)
tx.signature = Private.sign(tx.get_hash(), node_private)
return tx
def sign_block(block, private):
block_hash = block.get_hash()
signature = Private.sign(block_hash, private)
signed_block = SignedBlock()
signed_block.set_block(block)
signed_block.set_signature(signature)
return signed_block
def create_positive_gossip_transaction(block_hash, node_private):
tx = PositiveGossipTransaction()
tx.timestamp = Time.get_current_time()
tx.block_hash = block_hash
tx.pubkey = Private.publickey(node_private)
tx.signature = Private.sign(tx.get_hash(), node_private)
return tx
def create_public_key_transaction(generated_private, epoch_hash,
validator_index, node_private):
tx = PublicKeyTransaction()
tx.generated_pubkey = Private.publickey(generated_private)
tx.pubkey_index = validator_index
tx.signature = Private.sign(tx.get_signing_hash(epoch_hash),
node_private)
return tx
def create_commit_random_transaction(rand, pubkey_index, epoch_hash,
node_private):
tx = CommitRandomTransaction()
tx.rand = rand
tx.pubkey_index = pubkey_index
tx.signature = Private.sign(tx.get_signing_hash(epoch_hash),
node_private)
return tx
def create_payment_transaction(from_tx, amount, to, node_private):
tx = PaymentTransaction()
tx.from_tx = from_tx
tx.amount = amount
tx.to = to
tx.pubkey = Private.publickey(node_private)
tx.signature = Private.sign(tx.get_hash(), node_private)
return tx
def create_split_random_transaction(encoded_splits, pubkey_index,
epoch_hash, node_private):
tx = SplitRandomTransaction()
tx.pieces = encoded_splits
tx.pubkey_index = pubkey_index
tx.signature = Private.sign(tx.get_signing_hash(epoch_hash),
node_private)
return tx
def test_pack_parse_penalty_transaction(self):
original = PenaltyTransaction()
original.violator_pubkey = Private.publickey(Private.generate())
original.conflicts = [os.urandom(32), os.urandom(32), os.urandom(32)]
original.signature = Private.sign(original.get_hash(),
Private.generate())
raw = original.pack()
restored = PenaltyTransaction()
restored.parse(raw)
self.assertEqual(original.get_hash(), restored.get_hash())
def test_pack_parse_stakerelease_transaction(self):
private = Private.generate()
original = StakeReleaseTransaction()
original.pubkey = Private.publickey(private)
original.signature = Private.sign(original.get_hash(),
Private.generate())
raw = original.pack()
restored = StakeReleaseTransaction()
restored.parse(raw)
self.assertEqual(original.get_hash(), restored.get_hash())
def test_pack_parse_stakehold_transaction(self):
private = Private.generate()
original = StakeHoldTransaction()
original.amount = 1000
original.pubkey = Private.publickey(private)
original.signature = Private.sign(original.get_hash(), private)
raw = original.pack()
restored = StakeHoldTransaction()
restored.parse(raw)
self.assertEqual(original.get_hash(), restored.get_hash())
def test_parse_pack_gossip_negative(self):
private = Private.generate()
original = NegativeGossipTransaction()
original.pubkey = Private.publickey(private)
original.timestamp = Time.get_current_time()
original.number_of_block = 47
original.signature = Private.sign(original.get_hash(), private)
raw = original.pack()
restored = NegativeGossipTransaction()
restored.parse(raw)
self.assertEqual(original.get_hash(), restored.get_hash())
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_split_pack_unpack(self):
dummy_private = Private.generate()
original = SplitRandomTransaction()
original.pieces = [os.urandom(128), os.urandom(127), os.urandom(128)]
original.pubkey_index = 0
original.signature = Private.sign(
original.get_signing_hash(b"epoch_hash"), dummy_private)
raw = original.pack()
restored = SplitRandomTransaction()
restored.parse(raw)
self.assertEqual(original.get_hash(), restored.get_hash())
self.assertEqual(original.get_signing_hash(b"epoch_hash"),
restored.get_signing_hash(b"epoch_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 create_dummy_commit_reveal(random_bytes, epoch_hash):
node_private = Private.generate()
private = Private.generate()
encoded = Private.encrypt(random_bytes, private)
commit = CommitRandomTransaction()
commit.rand = encoded
commit.pubkey_index = 10
commit.signature = Private.sign(commit.get_signing_hash(epoch_hash),
node_private)
reveal = RevealRandomTransaction()
reveal.commit_hash = commit.get_hash()
reveal.key = Keys.to_bytes(private)
return commit, reveal
def test_pack_parse_commit_transaction(self):
for i in range(10):
dummy_private = Private.generate()
original = CommitRandomTransaction()
original.rand = Private.encrypt(os.urandom(32), dummy_private)
original.pubkey_index = i
original.signature = Private.sign(
original.get_signing_hash(b"epoch_hash"), dummy_private)
raw = original.pack()
restored = CommitRandomTransaction()
restored.parse(raw)
self.assertEqual(TransactionParser.pack(original),
TransactionParser.pack(restored))
self.assertEqual(original.get_hash(), restored.get_hash())
self.assertEqual(original.get_signing_hash(b"epoch_hash"),
restored.get_signing_hash(b"epoch_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 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 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 create_stake_release_transaction(node_private):
tx = StakeReleaseTransaction()
tx.pubkey = Private.publickey(node_private)
tx.signature = Private.sign(tx.get_hash(), node_private)
return tx
def create_penalty_transaction(conflicts, node_private):
tx = PenaltyTransaction()
tx.conflicts = conflicts
tx.signature = Private.sign(tx.get_hash(), node_private)
return tx
def create_penalty_gossip_transaction(conflict, node_private):
tx = PenaltyGossipTransaction()
tx.timestamp = Time.get_current_time()
tx.conflicts = conflict
tx.signature = Private.sign(tx.get_hash(), node_private)
return tx
def create_stake_hold_transaction(amount, node_private):
tx = StakeHoldTransaction()
tx.amount = amount
tx.pubkey = Private.publickey(node_private)
tx.signature = Private.sign(tx.get_hash(), node_private)
return tx
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)