def create_token_network_for_address(
self,
token_network_address: Address,
token_address: Address,
block_number: int = 0,
):
token_network = TokenNetwork(token_network_address, token_address)
self.token_networks[token_network_address] = token_network
log.debug('Creating token network model', token_network_address=token_network_address)
token_network_listener = BlockchainListener(
web3=self.web3,
contract_manager=self.contract_manager,
contract_address=token_network_address,
contract_name=CONTRACT_TOKEN_NETWORK,
required_confirmations=self.required_confirmations,
poll_interval=self.poll_interval,
sync_start_block=block_number,
)
# subscribe to event notifications from blockchain listener
token_network_listener.add_confirmed_listener(
create_channel_event_topics(),
self.handle_channel_event,
)
token_network_listener.start()
self.token_network_listeners.append(token_network_listener)
def blockchain_listener(web3, contracts_manager, token_network):
blockchain_listener = BlockchainListener(
web3=web3,
contract_manager=contracts_manager,
contract_name=CONTRACT_TOKEN_NETWORK,
contract_address=token_network.address,
poll_interval=0,
)
return blockchain_listener
def __init__(
self,
web3: Web3,
contract_manager: ContractManager,
registry_address: Address,
sync_start_block: int = 0,
required_confirmations: int = 8,
poll_interval: int = 10,
):
""" Creates a new pathfinding service
Args:
contract_manager: A contract manager
token_network_listener: A blockchain listener object
token_network_registry_listener: A blockchain listener object for the network registry
chain_id: The id of the chain the PFS runs on
"""
super().__init__()
self.web3 = web3
self.contract_manager = contract_manager
self.registry_address = registry_address
self.sync_start_block = sync_start_block
self.required_confirmations = required_confirmations
self.poll_interval = poll_interval
self.chain_id = int(web3.net.version)
self.is_running = gevent.event.Event()
self.token_networks: Dict[Address, TokenNetwork] = {}
self.token_network_listeners: List[BlockchainListener] = []
self.is_running = gevent.event.Event()
log.info('Starting TokenNetworkRegistry Listener (required confirmations: {})...'.format(
self.required_confirmations,
))
self.token_network_registry_listener = BlockchainListener(
web3=web3,
contract_manager=self.contract_manager,
contract_name=CONTRACT_TOKEN_NETWORK_REGISTRY,
contract_address=self.registry_address,
required_confirmations=self.required_confirmations,
poll_interval=self.poll_interval,
sync_start_block=self.sync_start_block,
)
log.info(
f'Listening to token network registry @ {registry_address} '
f'from block {sync_start_block}',
)
self._setup_token_networks()
def __init__(
self,
web3: Web3,
contract_manager: ContractManager,
registry_address: Address,
private_key: str,
db_filename: str,
user_deposit_contract_address: Address,
sync_start_block: int = 0,
required_confirmations: int = 8,
poll_interval: int = 10,
service_fee: int = 0,
):
""" Creates a new pathfinding service
Args:
contract_manager: A contract manager
token_network_listener: A blockchain listener object
token_network_registry_listener: A blockchain listener object for the network registry
chain_id: The id of the chain the PFS runs on
"""
super().__init__()
self.web3 = web3
self.contract_manager = contract_manager
self.registry_address = registry_address
self.sync_start_block = sync_start_block
self.required_confirmations = required_confirmations
self.poll_interval = poll_interval
self.chain_id = int(web3.net.version)
self.private_key = private_key
self.address = private_key_to_address(private_key)
self.service_fee = service_fee
self.is_running = gevent.event.Event()
self.token_networks: Dict[Address, TokenNetwork] = {}
self.token_network_listeners: List[BlockchainListener] = []
self.database = PFSDatabase(
filename=db_filename,
pfs_address=self.address,
)
self.user_deposit_contract = web3.eth.contract(
abi=self.contract_manager.get_contract_abi(
CONTRACT_USER_DEPOSIT,
),
address=user_deposit_contract_address,
)
log.info(
'Starting TokenNetworkRegistry Listener',
required_confirmations=self.required_confirmations,
)
self.token_network_registry_listener = BlockchainListener(
web3=web3,
contract_manager=self.contract_manager,
contract_name=CONTRACT_TOKEN_NETWORK_REGISTRY,
contract_address=self.registry_address,
required_confirmations=self.required_confirmations,
poll_interval=self.poll_interval,
sync_start_block=self.sync_start_block,
)
log.info(
'Listening to token network registry',
registry_address=registry_address,
start_block=sync_start_block,
)
self._setup_token_networks()
try:
self.matrix_listener = MatrixListener(
private_key=private_key,
chain_id=self.chain_id,
callback=self.handle_message,
service_room_suffix=PATH_FINDING_BROADCASTING_ROOM,
)
except ConnectionError as e:
log.critical(
'Could not connect to broadcasting system.',
exc=e,
)
sys.exit(1)