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 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_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_commit_reveal_pair(node_private, random_bytes, pubkey_index,
epoch_hash):
private = Private.generate()
encoded = Private.encrypt(random_bytes, private)
commit = TransactionFactory.create_commit_random_transaction(
encoded, pubkey_index, epoch_hash, node_private)
reveal = TransactionFactory.create_reveal_random_transaction(
commit.get_hash(), private)
return commit, reveal
def try_to_publish_public_key(self, current_block_number):
if self.epoch_private_keys:
return
epoch_hashes = self.epoch.get_epoch_hashes()
for _, epoch_hash in epoch_hashes.items():
allowed_round_validators = self.permissions.get_ordered_randomizers_pubkeys_for_round(
epoch_hash, Round.PUBLIC)
pubkey_publishers_pubkeys = [
validator.public_key for validator in allowed_round_validators
]
if self.node_pubkey in pubkey_publishers_pubkeys:
node_private = self.block_signer.private_key
pubkey_index = self.permissions.get_signer_index_from_public_key(
self.node_pubkey, epoch_hash)
generated_private = Private.generate()
tx = TransactionFactory.create_public_key_transaction(
generated_private=generated_private,
epoch_hash=epoch_hash,
validator_index=pubkey_index,
node_private=node_private)
if self.behaviour.malicious_wrong_signature:
tx.signature = b'0' + tx.signature[1:]
self.epoch_private_keys.append(generated_private)
self.logger.debug("Broadcasted public key")
self.logger.debug(Keys.to_visual_string(tx.generated_pubkey))
self.mempool.add_transaction(tx)
self.network.broadcast_transaction(self.node_id,
TransactionParser.pack(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 get_payment_transactions_for_signing(self, block_number):
node_public = Private.publickey(self.block_signer.private_key)
pseudo_address = sha256(node_public).digest()
block_reward = TransactionFactory.create_block_reward(
pseudo_address, block_number)
block_reward_hash = block_reward.get_hash()
self.owned_utxos.append(block_reward_hash)
payment_txs = [block_reward] + self.mempool.pop_payment_transactions()
return payment_txs
def test_encryption_and_decryption(self):
private_keys = []
public_keys = []
for i in range(0, 5):
private = Private.generate()
private_keys.append(private)
public_keys.append(Private.publickey(private))
raw_private_keys = Keys.list_to_bytes(private_keys)
decoded_private_keys = Keys.list_from_bytes(raw_private_keys)
random_bytes = os.urandom(32)
random_value = int.from_bytes(random_bytes, byteorder='big')
splits = split_secret(random_bytes, 3, 5)
encoded_splits = encode_splits(splits, public_keys)
decoded_random = decode_random(encoded_splits, decoded_private_keys)
self.assertEqual(random_value, decoded_random)