def create_token_network_for_address(
self,
token_network_address: Address,
token_address: Address,
block_number: int = 0,
):
# get token infos
token_contract = self.web3.eth.contract(
address=token_address,
abi=self.contract_manager.get_contract_abi(
CONTRACT_HUMAN_STANDARD_TOKEN),
)
token_infos = get_token_info(token_contract)
token_network = TokenNetwork(token_network_address, token_infos)
self.token_networks[token_network_address] = token_network
log.info('Creating token network for %s, token=%r',
token_network_address, token_infos)
token_network_listener = BlockchainListener(
web3=self.web3,
contract_manager=self.contract_manager,
contract_address=token_network_address,
contract_name=CONTRACT_TOKEN_NETWORK,
sync_start_block=block_number,
required_confirmations=self.required_confirmations,
)
# 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 __init__(
self,
web3: Web3,
contract_manager: ContractManager,
registry_address: Address,
sync_start_block: int = 0,
) -> None:
""" Creates a new pathfinding service
Args:
contract_manager: A contract manager
token_network_registry_listener: A blockchain listener object for the network registry
"""
super().__init__()
self.web3 = web3
self.contract_manager = contract_manager
self.is_running = gevent.event.Event()
self.token_networks: Dict[Address, TokenNetwork] = {}
self.token_network_listeners: List[BlockchainListener] = []
log.info('Starting TokenNetworkRegistry Listener...')
self.token_network_registry_listener = BlockchainListener(
web3=web3,
contract_manager=contract_manager,
contract_name=CONTRACT_TOKEN_NETWORK_REGISTRY,
contract_address=registry_address,
sync_start_block=sync_start_block,
)
self._setup_token_networks()
def __init__(
self,
web3: Web3,
contract_manager: ContractManager,
registry_address: Address,
sync_start_block: int = 0,
required_confirmations: int = 5, # the default
) -> None:
""" Creates a new metrics service
Args:
contract_manager: A contract manager
token_network_registry_listener: A blockchain listener object for the network registry
"""
super().__init__()
self.web3 = web3
self.contract_manager = contract_manager
self.required_confirmations = required_confirmations
self.is_running = gevent.event.Event()
self.token_networks: Dict[Address, TokenNetwork] = {}
self.token_network_listeners: List[BlockchainListener] = []
self.state = PaymentNetworkMetrics()
log.info('Starting TokenNetworkRegistry Listener (required confirmations: {})...'.format(
self.required_confirmations,
))
self.token_network_registry_listener = BlockchainListener(
web3=web3,
contract_manager=contract_manager,
contract_name=CONTRACT_TOKEN_NETWORK_REGISTRY,
contract_address=registry_address,
sync_start_block=sync_start_block,
required_confirmations=self.required_confirmations,
)
log.info(
f'Listening to token network registry @ {registry_address} '
f'from block {sync_start_block}'
)
self._setup_token_networks()
def create_token_network_for_address(
self,
token_network_address: Address,
block_number: int = 0,
):
token_network = TokenNetwork(token_network_address)
self.token_networks[token_network_address] = token_network
log.info('Creating token network for %s', 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,
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)