コード例 #1
0
class ChannelService:
    def __init__(self, channel_name, amqp_target, amqp_key, rollback=False):
        self.__block_manager: BlockManager = None
        self.__score_container: CommonSubprocess = None
        self.__score_info: dict = None
        self.__peer_auth: Signer = None
        self.__broadcast_scheduler: BroadcastScheduler = None
        self.__rs_client: RestClient = None
        self.__timer_service = TimerService()
        self.__node_subscriber: NodeSubscriber = None
        self._rollback: bool = rollback

        loggers.get_preset().channel_name = channel_name
        loggers.get_preset().update_logger()

        channel_queue_name = conf.CHANNEL_QUEUE_NAME_FORMAT.format(channel_name=channel_name, amqp_key=amqp_key)
        self.__inner_service = ChannelInnerService(
            amqp_target, channel_queue_name, conf.AMQP_USERNAME, conf.AMQP_PASSWORD, channel_service=self)

        logging.info(f"ChannelService : {channel_name}, Queue : {channel_queue_name}")

        ChannelProperty().name = channel_name
        ChannelProperty().amqp_target = amqp_target
        ChannelProperty().crep_root_hash = Hash32.fromhex(conf.CHANNEL_OPTION[channel_name].get('crep_root_hash'))

        StubCollection().amqp_key = amqp_key
        StubCollection().amqp_target = amqp_target

        command_arguments.add_raw_command(command_arguments.Type.Channel, channel_name)
        command_arguments.add_raw_command(command_arguments.Type.AMQPTarget, amqp_target)
        command_arguments.add_raw_command(command_arguments.Type.AMQPKey, amqp_key)

        ObjectManager().channel_service = self
        self.__state_machine = ChannelStateMachine(self)

    @property
    def block_manager(self):
        return self.__block_manager

    @property
    def score_container(self):
        return self.__score_container

    @property
    def score_info(self):
        return self.__score_info

    @property
    def rs_client(self):
        return self.__rs_client

    @property
    def broadcast_scheduler(self):
        return self.__broadcast_scheduler

    @property
    def timer_service(self):
        return self.__timer_service

    @property
    def state_machine(self):
        return self.__state_machine

    @property
    def inner_service(self):
        return self.__inner_service

    @property
    def node_subscriber(self):
        return self.__node_subscriber

    def serve(self):
        async def _serve():
            await StubCollection().create_peer_stub()

            results = await StubCollection().peer_stub.async_task().get_node_info_detail()
            self._init_properties(**results)

            await self._init()
            self.__timer_service.start()
            self.__state_machine.complete_init_components()
            logging.info(f'channel_service: init complete channel: {ChannelProperty().name}, '
                         f'state({self.__state_machine.state})')

        loop = self.__inner_service.loop
        serve_coroutine = _serve() if not self._rollback else self._serve_manual_rollback()
        loop.create_task(serve_coroutine)
        loop.add_signal_handler(signal.SIGINT, self.close, signal.SIGINT)
        loop.add_signal_handler(signal.SIGTERM, self.close, signal.SIGTERM)

        try:
            loop.run_forever()
        except Exception as e:
            traceback.print_exception(type(e), e, e.__traceback__)
        finally:
            loop.run_until_complete(loop.shutdown_asyncgens())
            self._cancel_tasks(loop)
            self._cleanup()
            loop.close()

    async def _serve_manual_rollback(self):
        """Initialize minimum channel resources and manual rollback

        :return: None
        """
        await StubCollection().create_peer_stub()

        results = await StubCollection().peer_stub.async_task().get_node_info_detail()
        self._init_properties(**results)

        self.__init_block_manager()
        await self.__init_score_container()
        await self.__inner_service.connect(conf.AMQP_CONNECTION_ATTEMPTS, conf.AMQP_RETRY_DELAY, exclusive=True)
        await asyncio.sleep(0.01)   # sleep to complete peer service initialization

        message = self._manual_rollback()
        self.shutdown_peer(message=message)

    def _manual_rollback(self) -> str:
        logging.debug("_manual_rollback() start manual rollback")
        if self.block_manager.blockchain.block_height >= 0:
            self.block_manager.rebuild_block()

        if self.block_manager.request_rollback():
            message = "rollback finished"
        else:
            message = "rollback cancelled"

        logging.debug("_manual_rollback() end manual rollback")
        return message

    def close(self, signum=None):
        logging.info(f"close() signum = {repr(signum)}")
        if self.__inner_service:
            self.__inner_service.cleanup()

        self.__inner_service.loop.stop()

    @staticmethod
    def _cancel_tasks(loop):
        for task in asyncio.Task.all_tasks(loop):
            if task.done():
                continue
            task.cancel()
            try:
                loop.run_until_complete(task)
            except asyncio.CancelledError as e:
                logging.info(f"_cancel_tasks() task : {task}, error : {e}")

    def _cleanup(self):
        logging.info("_cleanup() Channel Resources.")

        if self.__timer_service.is_run():
            self.__timer_service.stop()
            self.__timer_service.wait()
            logging.info("_cleanup() TimerService.")

        if self.__score_container:
            self.__score_container.stop()
            self.__score_container.wait()
            self.__score_container = None
            logging.info("_cleanup() ScoreContainer.")

        if self.__broadcast_scheduler:
            self.__broadcast_scheduler.stop()
            self.__broadcast_scheduler.wait()
            self.__broadcast_scheduler = None
            logging.info("_cleanup() BroadcastScheduler.")

        if self.__block_manager:
            self.__block_manager.stop()
            self.__block_manager = None
            logging.info("_cleanup() BlockManager.")

    @staticmethod
    def _init_properties(**kwargs):
        """Initialize properties

        :param kwargs: takes (peer_id, peer_port, peer_target, rest_target)
        within parameters
        :return: None
        """
        loggers.get_preset().peer_id = kwargs.get('peer_id')
        loggers.get_preset().update_logger()

        ChannelProperty().peer_port = kwargs.get('peer_port')
        ChannelProperty().peer_target = kwargs.get('peer_target')
        ChannelProperty().rest_target = kwargs.get('rest_target')
        ChannelProperty().peer_id = kwargs.get('peer_id')
        ChannelProperty().peer_address = ExternalAddress.fromhex_address(ChannelProperty().peer_id)
        ChannelProperty().node_type = conf.NodeType.CitizenNode
        ChannelProperty().rs_target = None

    async def _init(self):
        """Initialize channel resources

        :return: None
        """
        await self.__init_peer_auth()
        self.__init_broadcast_scheduler()
        self.__init_block_manager()

        await self.__init_score_container()
        await self.__inner_service.connect(conf.AMQP_CONNECTION_ATTEMPTS, conf.AMQP_RETRY_DELAY, exclusive=True)
        await self.__init_sub_services()

    async def evaluate_network(self):
        await self._init_rs_client()
        self.__block_manager.blockchain.init_crep_reps()
        await self._select_node_type()
        self.__ready_to_height_sync()
        self.__state_machine.block_sync()

    async def subscribe_network(self):
        await self._select_node_type()

        if self.is_support_node_function(conf.NodeFunction.Vote):
            await self.set_peer_type_in_channel()
        else:
            await self._init_rs_target()
            if ChannelProperty().rs_target is None:
                return
            self.__init_node_subscriber()
            await self.subscribe_to_parent()

        self.__state_machine.complete_subscribe()

        if self.is_support_node_function(conf.NodeFunction.Vote):
            self.turn_on_leader_complain_timer()

    def update_nid(self):
        nid = self.__block_manager.blockchain.find_nid()
        self.__inner_service.update_sub_services_properties(nid=int(nid, 16))

    def _get_node_type_by_peer_list(self):
        epoch = self.block_manager.epoch
        if epoch:
            reps = self.__block_manager.blockchain.find_preps_addresses_by_roothash(
                epoch.reps_hash)
        else:
            reps = self.__block_manager.blockchain.find_preps_addresses_by_roothash(
                ChannelProperty().crep_root_hash)

        if ChannelProperty().peer_address in reps:
            return conf.NodeType.CommunityNode
        return conf.NodeType.CitizenNode

    def _is_role_switched(self) -> bool:
        new_node_type = self._get_node_type_by_peer_list()
        if new_node_type == ChannelProperty().node_type:
            utils.logger.debug(f"By peer manager, maintains the current node type({ChannelProperty().node_type})")
            return False

        return True

    async def _select_node_type(self):
        if self._is_role_switched():
            new_node_type = self._get_node_type_by_peer_list()
            utils.logger.info(f"Role switching to new node type: {new_node_type.name}")
            ChannelProperty().node_type = new_node_type
        self.__inner_service.update_sub_services_properties(node_type=ChannelProperty().node_type.value)

    def switch_role(self):
        self.__block_manager.blockchain.reset_leader_made_block_count(need_check_switched_role=True)
        if self._is_role_switched():
            self.__state_machine.switch_role()

    async def reset_network(self):
        utils.logger.info("Reset network")
        self.__timer_service.clean(except_key=TimerService.TIMER_KEY_BROADCAST_SEND_UNCONFIRMED_BLOCK)
        self.__rs_client = None
        self.__state_machine.evaluate_network()

    async def __init_peer_auth(self):
        try:
            node_key: bytes = await StubCollection().peer_stub.async_task().get_node_key()
            self.__peer_auth = Signer.from_prikey(node_key)
            ChannelProperty().peer_auth = self.__peer_auth
        except Exception as e:
            utils.exit_and_msg(f"peer auth init fail cause : {e}")

    def __init_block_manager(self):
        logging.debug(f"__init_block_manager() : channel({ChannelProperty().name})")

        channel_name = ChannelProperty().name
        develop = command_arguments.command_values.get(command_arguments.Type.Develop, False)
        store_id = f"{ChannelProperty().peer_port}_{channel_name}" if develop else channel_name
        try:
            self.__block_manager = BlockManager(
                channel_service=self,
                peer_id=ChannelProperty().peer_id,
                channel_name=channel_name,
                store_id=store_id
            )
        except KeyValueStoreError as e:
            utils.exit_and_msg("KeyValueStoreError(" + str(e) + ")")

    def __init_broadcast_scheduler(self):
        scheduler = BroadcastSchedulerFactory.new(channel=ChannelProperty().name,
                                                  self_target=ChannelProperty().peer_target)
        scheduler.start()
        self.__broadcast_scheduler = scheduler

    def _get_radiostations(self):
        radiostations: list = self.get_channel_option().get('radiostations')
        if not radiostations:
            logging.warning(f"no configurations for radiostations.")
            return None

        radiostations = utils.convert_local_ip_to_private_ip(radiostations)
        try:
            radiostations.remove(ChannelProperty().rest_target)
        except ValueError:
            pass

        return radiostations

    async def _init_rs_target(self, refresh_all: bool = False):
        if refresh_all:
            radiostations = self._get_radiostations()
            if radiostations is None:
                return
            await self.__rs_client.init(radiostations)
        else:
            try:
                self.__rs_client.init_next_target()
            except StopIteration:
                return await self._init_rs_target(refresh_all=True)

        ChannelProperty().rs_target = self.__rs_client.target
        self.__inner_service.update_sub_services_properties(relay_target=ChannelProperty().rs_target)

    async def _init_rs_client(self):
        self.__rs_client = RestClient(channel=ChannelProperty().name)
        await self._init_rs_target(refresh_all=True)

    async def __init_score_container(self):
        """create score container and save score_info and score_stub
        """
        try:
            self.__score_info = await self.__run_score_container()
        except BaseException as e:
            logging.error(e)
            traceback.print_exc()
            utils.exit_and_msg(f"run_score_container failed!!")

    async def __init_sub_services(self):
        self.__inner_service.init_sub_services()
        await StubCollection().create_channel_tx_creator_stub(ChannelProperty().name)
        await StubCollection().create_channel_tx_receiver_stub(ChannelProperty().name)

    def __init_node_subscriber(self):
        self.__node_subscriber = NodeSubscriber(
            channel=ChannelProperty().name,
            rs_target=ChannelProperty().rs_target
        )

    async def __run_score_container(self):
        if conf.RUN_ICON_IN_LAUNCHER:
            process_args = ['python3', '-m', 'loopchain', 'score',
                            '--channel', ChannelProperty().name]
            process_args += command_arguments.get_raw_commands_by_filter(
                command_arguments.Type.AMQPTarget,
                command_arguments.Type.AMQPKey,
                command_arguments.Type.Develop,
                command_arguments.Type.ConfigurationFilePath,
                command_arguments.Type.RadioStationTarget
            )
            self.__score_container = CommonSubprocess(process_args)

        await StubCollection().create_icon_score_stub(ChannelProperty().name)
        await StubCollection().icon_score_stubs[ChannelProperty().name].connect()
        await StubCollection().icon_score_stubs[ChannelProperty().name].async_task().hello()
        return None

    def is_support_node_function(self, node_function):
        return conf.NodeType.is_support_node_function(node_function, ChannelProperty().node_type)

    def get_channel_option(self) -> dict:
        return conf.CHANNEL_OPTION[ChannelProperty().name]

    def generate_genesis_block(self):
        if self.__block_manager.blockchain.block_height > -1:
            logging.debug("genesis block was already generated")
            return

        reps = self.block_manager.blockchain.find_preps_addresses_by_roothash(ChannelProperty().crep_root_hash)
        self.__block_manager.blockchain.generate_genesis_block(reps)

    async def subscribe_to_parent(self):
        def _handle_exception(future: asyncio.Future):
            exc = future.exception()
            logging.debug(f"error: {type(exc)}, {str(exc)}")

            if ChannelProperty().node_type != conf.NodeType.CitizenNode:
                logging.debug(f"This node is not Citizen anymore.")
                return

            if isinstance(exc, AnnounceNewBlockError):
                self.__state_machine.block_sync()
                return

            if exc:
                if (self.__state_machine.state != "SubscribeNetwork"
                        or isinstance(exc, UnregisteredException)):
                    self.__state_machine.subscribe_network()
                else:
                    logging.warning(f"Waiting for next subscribe request...")

        utils.logger.spam(f"try subscribe_call_by_citizen target({ChannelProperty().rest_target})")
        subscribe_event = asyncio.Event()
        # try websocket connection, and handle exception in callback
        task = asyncio.ensure_future(
            self.__node_subscriber.start(
                block_height=self.__block_manager.blockchain.block_height,
                event=subscribe_event
            ),
            loop=self.__inner_service.loop
        )
        task.add_done_callback(_handle_exception)

        await subscribe_event.wait()

    def shutdown_peer(self, **kwargs):
        logging.debug(f"shutdown_peer() kwargs = {kwargs}")
        StubCollection().peer_stub.sync_task().stop(message=kwargs['message'])

    def set_peer_type(self, peer_type):
        """Set peer type when peer init only

        :param peer_type:
        :return:
        """
        self.__block_manager.set_peer_type(peer_type)

    def save_peer_manager(self, peer_manager):
        """Save peer_list to leveldb

        :param peer_manager:
        """
        level_db_key_name = str.encode(conf.LEVEL_DB_KEY_FOR_PEER_LIST)

        try:
            dump = peer_manager.dump()
            key_value_store = self.__block_manager.blockchain.blockchain_store
            key_value_store.put(level_db_key_name, dump)
        except AttributeError as e:
            logging.warning("Fail Save Peer_list: " + str(e))

    async def set_peer_type_in_channel(self):
        peer_type = loopchain_pb2.PEER
        leader_id = self.__block_manager.get_next_leader()
        utils.logger.info(f"channel({ChannelProperty().name}) peer_leader: {leader_id}")

        logger_preset = loggers.get_preset()
        if ChannelProperty().peer_id == leader_id:
            logger_preset.is_leader = True
            utils.logger.info(f"Set Peer Type Leader! channel({ChannelProperty().name})")
            peer_type = loopchain_pb2.BLOCK_GENERATOR
        else:
            logger_preset.is_leader = False
        logger_preset.update_logger()

        self.__block_manager.set_peer_type(peer_type)

    def _is_genesis_node(self):
        return ('genesis_data_path' in self.get_channel_option()
                and self.is_support_node_function(conf.NodeFunction.Vote))

    def __ready_to_height_sync(self):
        if self.block_manager.blockchain.block_height >= 0:
            self.block_manager.rebuild_block()
        else:
            if self._is_genesis_node():
                self.generate_genesis_block()

        if not self.is_support_node_function(conf.NodeFunction.Vote) and not ChannelProperty().rs_target:
            utils.exit_and_msg(f"There's no radiostation target to sync block.")

    def reset_leader(self, new_leader_id, block_height=0, complained=False):
        """

        :param new_leader_id:
        :param block_height:
        :param complained:
        :return:
        """

        blockchain = self.__block_manager.blockchain
        prep_targets = blockchain.find_preps_targets_by_roothash(self.__block_manager.epoch.reps_hash)
        if ChannelProperty().peer_id not in prep_targets:
            if self.is_support_node_function(conf.NodeFunction.Vote):
                utils.logger.warning(f"This peer needs to switch to citizen.")
            return

        leader_peer_target = prep_targets.get(new_leader_id, None)

        if block_height > 0 and block_height != self.block_manager.blockchain.last_block.header.height + 1:
            utils.logger.warning(f"height behind peer can not take leader role. block_height({block_height}), "
                                 f"last_block.header.height("
                                 f"{self.block_manager.blockchain.last_block.header.height})")
            return

        if leader_peer_target is None:
            logging.warning(f"in peer_service:reset_leader There is no peer by peer_id({new_leader_id})")
            return

        utils.logger.spam(f"reset_leader target({leader_peer_target}), complained={complained}")

        if complained:
            self.__block_manager.blockchain.reset_leader_made_block_count()
            self.__block_manager.epoch.new_round(new_leader_id)

        if ChannelProperty().peer_id == new_leader_id:
            utils.logger.debug("Set Peer Type Leader!")
            peer_type = loopchain_pb2.BLOCK_GENERATOR
            self.state_machine.turn_to_leader()
        else:
            utils.logger.debug("Set Peer Type Peer!")
            peer_type = loopchain_pb2.PEER
            self.state_machine.turn_to_peer()

        self.__block_manager.set_peer_type(peer_type)
        self.turn_on_leader_complain_timer()

    def score_write_precommit_state(self, block: Block):
        logging.debug(f"call score commit {ChannelProperty().name} {block.header.height} {block.header.hash.hex()}")

        new_block_hash = block.header.hash
        try:
            old_block_hash = self.__block_manager.get_old_block_hash(block.header.height, new_block_hash)
        except KeyError:
            old_block_hash = new_block_hash

        logging.debug(f"Block Hash : {old_block_hash} -> {new_block_hash}")
        request = {
            "blockHeight": block.header.height,
            "oldBlockHash": old_block_hash.hex(),
            "newBlockHash": new_block_hash.hex()
        }
        request = convert_params(request, ParamType.write_precommit_state)

        stub = StubCollection().icon_score_stubs[ChannelProperty().name]
        precommit_result: dict = stub.sync_task().write_precommit_state(request)
        if "error" in precommit_result:
            raise WritePrecommitStateError(precommit_result['error'])

        self.__block_manager.pop_old_block_hashes(block.header.height)
        return True

    def callback_leader_complain_timeout(self):
        if self.state_machine.state == "BlockGenerate":
            _, new_leader_id = self.block_manager.get_leader_ids_for_complaint()
            if new_leader_id == ChannelProperty().peer_id:
                utils.logger.debug(
                    f"Cannot convert the state to the `LeaderComplain` from the `BlockGenerate`"
                    f", because I'm the BlockGenerate and the next leader candidate.")
                return

        self.state_machine.leader_complain()

    def turn_on_leader_complain_timer(self):
        """Turn on a leader complaint timer by the configuration name of `ALLOW_MAKE_EMPTY_BLOCK`.
        """
        if conf.ALLOW_MAKE_EMPTY_BLOCK:
            self.reset_leader_complain_timer()
        else:
            self.start_leader_complain_timer_if_tx_exists()

    def reset_leader_complain_timer(self):
        utils.logger.spam(f"reset_leader_complain_timer in channel service. ("
                          f"{self.__block_manager.epoch.round}/{self.__block_manager.epoch.complain_duration})")

        if self.__timer_service.get_timer(TimerService.TIMER_KEY_LEADER_COMPLAIN):
            utils.logger.spam(f"Try to stop leader complaint timer for reset.")
            self.stop_leader_complain_timer()

        self.start_leader_complain_timer()

    def start_leader_complain_timer_if_tx_exists(self):
        if not self.block_manager.get_tx_queue().is_empty_in_status(TransactionStatusInQueue.normal):
            utils.logger.debug("Start leader complain timer because unconfirmed tx exists.")
            self.start_leader_complain_timer()

    def start_leader_complain_timer(self, duration=None):
        if duration is None:
            duration = self.__block_manager.epoch.complain_duration
        utils.logger.spam(
            f"start_leader_complain_timer in channel service. ({self.block_manager.epoch.round}/{duration})")
        if self.state_machine.state in ("Vote", "LeaderComplain"):
            self.__timer_service.add_timer_convenient(timer_key=TimerService.TIMER_KEY_LEADER_COMPLAIN,
                                                      duration=duration,
                                                      is_repeat=True, callback=self.callback_leader_complain_timeout)

    def stop_leader_complain_timer(self):
        utils.logger.spam(f"stop_leader_complain_timer in channel service.")
        self.__timer_service.stop_timer(TimerService.TIMER_KEY_LEADER_COMPLAIN)

    def start_subscribe_timer(self):
        self.__timer_service.add_timer_convenient(timer_key=TimerService.TIMER_KEY_SUBSCRIBE,
                                                  duration=conf.SUBSCRIBE_RETRY_TIMER,
                                                  is_repeat=True, callback=self.subscribe_network)

    def stop_subscribe_timer(self):
        self.__timer_service.stop_timer(TimerService.TIMER_KEY_SUBSCRIBE)

    def start_shutdown_timer_when_fail_subscribe(self):
        error = f"Shutdown by Subscribe retry timeout({conf.SHUTDOWN_TIMER} sec)"
        self.__timer_service.add_timer_convenient(timer_key=TimerService.TIMER_KEY_SHUTDOWN_WHEN_FAIL_SUBSCRIBE,
                                                  duration=conf.SHUTDOWN_TIMER, callback=self.shutdown_peer,
                                                  callback_kwargs={"message": error})

    def stop_shutdown_timer_when_fail_subscribe(self):
        self.__timer_service.stop_timer(TimerService.TIMER_KEY_SHUTDOWN_WHEN_FAIL_SUBSCRIBE)

    def start_block_monitoring_timer(self):
        self.__timer_service.add_timer_convenient(timer_key=TimerService.TIMER_KEY_BLOCK_MONITOR,
                                                  duration=conf.TIMEOUT_FOR_BLOCK_MONITOR,
                                                  callback=self.state_machine.subscribe_network)

    def reset_block_monitoring_timer(self):
        if self.__timer_service.get_timer(TimerService.TIMER_KEY_BLOCK_MONITOR):
            self.__timer_service.reset_timer(TimerService.TIMER_KEY_BLOCK_MONITOR)

    def stop_block_monitoring_timer(self):
        self.__timer_service.stop_timer(TimerService.TIMER_KEY_BLOCK_MONITOR)

    def stop_ws_heartbeat_timer(self):
        self.__timer_service.stop_timer(TimerService.TIMER_KEY_WS_HEARTBEAT)
コード例 #2
0
ファイル: channel_service.py プロジェクト: assays/loopchain
class ChannelService:
    def __init__(self, channel_name, amqp_target, amqp_key):
        self.__block_manager: BlockManager = None
        self.__score_container: CommonSubprocess = None
        self.__score_info: dict = None
        self.__peer_auth: Signer = None
        self.__peer_manager: PeerManager = None
        self.__broadcast_scheduler: BroadcastScheduler = None
        self.__radio_station_stub = None
        self.__consensus = None
        self.__timer_service = TimerService()
        self.__node_subscriber: NodeSubscriber = None
        self.__channel_infos: dict = None

        loggers.get_preset().channel_name = channel_name
        loggers.get_preset().update_logger()

        channel_queue_name = conf.CHANNEL_QUEUE_NAME_FORMAT.format(
            channel_name=channel_name, amqp_key=amqp_key)
        self.__inner_service = ChannelInnerService(amqp_target,
                                                   channel_queue_name,
                                                   conf.AMQP_USERNAME,
                                                   conf.AMQP_PASSWORD,
                                                   channel_service=self)

        logging.info(
            f"ChannelService : {channel_name}, Queue : {channel_queue_name}")

        ChannelProperty().name = channel_name
        ChannelProperty().amqp_target = amqp_target

        StubCollection().amqp_key = amqp_key
        StubCollection().amqp_target = amqp_target

        command_arguments.add_raw_command(command_arguments.Type.Channel,
                                          channel_name)
        command_arguments.add_raw_command(command_arguments.Type.AMQPTarget,
                                          amqp_target)
        command_arguments.add_raw_command(command_arguments.Type.AMQPKey,
                                          amqp_key)

        ObjectManager().channel_service = self
        self.__state_machine = ChannelStateMachine(self)

    @property
    def block_manager(self):
        return self.__block_manager

    @property
    def score_container(self):
        return self.__score_container

    @property
    def score_info(self):
        return self.__score_info

    @property
    def radio_station_stub(self):
        return self.__radio_station_stub

    @property
    def peer_auth(self):
        return self.__peer_auth

    @property
    def peer_manager(self):
        return self.__peer_manager

    @property
    def broadcast_scheduler(self):
        return self.__broadcast_scheduler

    @property
    def consensus(self):
        return self.__consensus

    @property
    def timer_service(self):
        return self.__timer_service

    @property
    def state_machine(self):
        return self.__state_machine

    @property
    def inner_service(self):
        return self.__inner_service

    def serve(self):
        async def _serve():
            await StubCollection().create_peer_stub()

            channel_name = ChannelProperty().name
            self.__channel_infos = (await StubCollection(
            ).peer_stub.async_task().get_channel_infos())[channel_name]
            results = await StubCollection().peer_stub.async_task(
            ).get_channel_info_detail(channel_name)

            await self.init(*results)

            self.__timer_service.start()
            self.__state_machine.complete_init_components()
            logging.info(
                f'channel_service: init complete channel: {ChannelProperty().name}, '
                f'state({self.__state_machine.state})')

        loop = MessageQueueService.loop
        # loop.set_debug(True)
        loop.create_task(_serve())
        loop.add_signal_handler(signal.SIGINT, self.close)
        loop.add_signal_handler(signal.SIGTERM, self.close)

        try:
            loop.run_forever()
        finally:
            loop.run_until_complete(loop.shutdown_asyncgens())
            loop.close()

            self.cleanup()

    def close(self):
        if self.__inner_service:
            self.__inner_service.cleanup()
            logging.info("Cleanup ChannelInnerService.")

        MessageQueueService.loop.stop()

    def cleanup(self):
        logging.info("Cleanup Channel Resources.")

        if self.__block_manager:
            self.__block_manager.stop()
            self.__block_manager = None
            logging.info("Cleanup BlockManager.")

        if self.__score_container:
            self.__score_container.stop()
            self.__score_container.wait()
            self.__score_container = None
            logging.info("Cleanup ScoreContainer.")

        if self.__broadcast_scheduler:
            self.__broadcast_scheduler.stop()
            self.__broadcast_scheduler.wait()
            self.__broadcast_scheduler = None
            logging.info("Cleanup BroadcastScheduler.")

        if self.__consensus:
            self.__consensus.stop()
            self.__consensus.wait()
            logging.info("Cleanup Consensus.")

        if self.__timer_service.is_run():
            self.__timer_service.stop()
            self.__timer_service.wait()
            logging.info("Cleanup TimerService.")

    async def init(self, peer_port, peer_target, rest_target,
                   radio_station_target, peer_id, group_id, node_type,
                   score_package):
        loggers.get_preset().peer_id = peer_id
        loggers.get_preset().update_logger()

        ChannelProperty().peer_port = peer_port
        ChannelProperty().peer_target = peer_target
        ChannelProperty().rest_target = rest_target
        ChannelProperty().radio_station_target = radio_station_target
        ChannelProperty().peer_id = peer_id
        ChannelProperty().group_id = group_id
        ChannelProperty().node_type = conf.NodeType(node_type)
        ChannelProperty().score_package = score_package

        self.__peer_manager = PeerManager(ChannelProperty().name)
        await self.__init_peer_auth()
        self.__init_broadcast_scheduler()
        self.__init_block_manager()

        await self.__init_score_container()
        await self.__inner_service.connect(conf.AMQP_CONNECTION_ATTEMPS,
                                           conf.AMQP_RETRY_DELAY,
                                           exclusive=True)
        await self.__init_sub_services()

        self.block_manager.init_epoch()

    async def __init_network(self):
        self.__inner_service.update_sub_services_properties(
            node_type=ChannelProperty().node_type.value)

        self.__init_radio_station_stub()

        if self.is_support_node_function(conf.NodeFunction.Vote):
            if conf.ENABLE_REP_RADIO_STATION:
                self.connect_to_radio_station()
            else:
                await self.__load_peers_from_file()
        else:
            self.__init_node_subscriber()

    async def evaluate_network(self):
        self.__ready_to_height_sync()

        # Do not consider to change peer list by IISS this time.
        await self.__select_node_type()
        await self.__init_network()

        self.__state_machine.block_sync()

    async def subscribe_network(self):
        if self.is_support_node_function(conf.NodeFunction.Vote):
            await self.set_peer_type_in_channel()
        else:
            await self.subscribe_to_radio_station()

        if conf.CONSENSUS_ALGORITHM == conf.ConsensusAlgorithm.lft:
            if not self.__consensus.is_run():
                self.__consensus.change_epoch(
                    precommit_block=self.__block_manager.get_blockchain(
                    ).last_block)
                self.__consensus.start()
        elif conf.ALLOW_MAKE_EMPTY_BLOCK:
            if not self.block_manager.block_generation_scheduler.is_run():
                self.block_manager.block_generation_scheduler.start()
        self.__state_machine.complete_subscribe()

        self.start_leader_complain_timer_if_tx_exists()

    def update_sub_services_properties(self):
        nid = self.block_manager.get_blockchain().find_nid()
        self.__inner_service.update_sub_services_properties(nid=int(nid, 16))

    def __get_role_switch_block_height(self):
        # Currently, only one way role switch is supported from Citizen to Rep
        if ChannelProperty().node_type != conf.NodeType.CitizenNode:
            return -1
        return self.get_channel_option().get('role_switch_block_height', -1)

    def __get_node_type_by_peer_list(self):
        # FIXME: this is temporary codes. get peer list with IISS API
        #        IISS peer list include just peer_id and a URL that a server provide peer details
        channels = util.load_json_data(conf.CHANNEL_MANAGE_DATA_PATH)
        for peer_info in channels[ChannelProperty().name]["peers"]:
            if peer_info['id'] == ChannelProperty().peer_id:
                return conf.NodeType.CommunityNode
        return conf.NodeType.CitizenNode

    async def __clean_network(self):
        if self.__node_subscriber is not None:
            await self.__node_subscriber.close()
            self.__node_subscriber: NodeSubscriber = None

        self.__timer_service.clean()

        peer_ids = set()
        for peer_list in self.__peer_manager.peer_list.values():
            for peer_id in peer_list.keys():
                peer_ids.add(peer_id)
        for peer_id in peer_ids:
            self.__peer_manager.remove_peer(peer_id)

        self.__radio_station_stub = None

    async def __select_node_type(self):
        # If block height is under zero this node has not synchronized blocks yet.
        block_height = self.__block_manager.get_blockchain().block_height
        if block_height < 0:
            util.logger.debug(
                f"Currently, Can't select node type without block height. block height={block_height}"
            )
            return

        switch_block_height = self.__get_role_switch_block_height()
        if switch_block_height < 0 or block_height < switch_block_height:
            util.logger.debug(
                f"Does not need to select node type. role switch block height={switch_block_height}"
            )
            return

        node_type: conf.NodeType = self.__get_node_type_by_peer_list()
        if node_type == ChannelProperty().node_type:
            util.logger.info(
                f"Node type equals previous note type ({node_type}). force={force}"
            )
            return

        util.logger.info(f"Selected node type {node_type}")
        ChannelProperty().node_type = node_type

        await StubCollection().peer_stub.async_task().change_node_type(
            node_type.value)

    def reset_network_by_block_height(self, height):
        if height == self.__get_role_switch_block_height():
            self.__state_machine.switch_role()

    async def reset_network(self):
        util.logger.info("Reset network")
        await self.__clean_network()
        self.__state_machine.evaluate_network()

    async def __init_peer_auth(self):
        try:
            node_key: bytes = await StubCollection().peer_stub.async_task(
            ).get_node_key(ChannelProperty().name)
            self.__peer_auth = Signer.from_prikey(node_key)
        except KeyError:
            self.__peer_auth = Signer.from_channel(ChannelProperty().name)
        except Exception as e:
            logging.exception(f"peer auth init fail cause : {e}")
            util.exit_and_msg(f"peer auth init fail cause : {e}")

    def __init_block_manager(self):
        logging.debug(
            f"__load_block_manager_each channel({ChannelProperty().name})")
        try:
            self.__block_manager = BlockManager(
                name="loopchain.peer.BlockManager",
                channel_manager=self,
                peer_id=ChannelProperty().peer_id,
                channel_name=ChannelProperty().name,
                level_db_identity=ChannelProperty().peer_target)
        except leveldb.LevelDBError as e:
            util.exit_and_msg("LevelDBError(" + str(e) + ")")

    def __init_broadcast_scheduler(self):
        scheduler = BroadcastSchedulerFactory.new(
            channel=ChannelProperty().name,
            self_target=ChannelProperty().peer_target)
        scheduler.start()

        self.__broadcast_scheduler = scheduler

        scheduler.schedule_job(BroadcastCommand.SUBSCRIBE,
                               ChannelProperty().peer_target,
                               block=True,
                               block_timeout=conf.TIMEOUT_FOR_FUTURE)

    def __init_radio_station_stub(self):
        if self.is_support_node_function(conf.NodeFunction.Vote):
            if conf.ENABLE_REP_RADIO_STATION:
                self.__radio_station_stub = StubManager.get_stub_manager_to_server(
                    ChannelProperty().radio_station_target,
                    loopchain_pb2_grpc.RadioStationStub,
                    conf.CONNECTION_RETRY_TIMEOUT_TO_RS,
                    ssl_auth_type=conf.GRPC_SSL_TYPE)
        else:
            self.__radio_station_stub = RestStubManager(
                ChannelProperty().radio_station_target,
                ChannelProperty().name)

    async def __init_score_container(self):
        """create score container and save score_info and score_stub
        """
        for i in range(conf.SCORE_LOAD_RETRY_TIMES):
            try:
                self.__score_info = await self.__run_score_container()
            except BaseException as e:
                util.logger.spam(
                    f"channel_manager:load_score_container_each score_info load fail retry({i})"
                )
                logging.error(e)
                traceback.print_exc()
                time.sleep(conf.SCORE_LOAD_RETRY_INTERVAL
                           )  # This blocking main thread is intended.

            else:
                break

    async def __init_sub_services(self):
        self.__inner_service.init_sub_services()
        await StubCollection().create_channel_tx_creator_stub(
            ChannelProperty().name)
        await StubCollection().create_channel_tx_receiver_stub(
            ChannelProperty().name)

    def __init_node_subscriber(self):
        self.__node_subscriber = NodeSubscriber(
            channel=ChannelProperty().name,
            rs_target=ChannelProperty().radio_station_target)

    async def __run_score_container(self):
        if conf.RUN_ICON_IN_LAUNCHER:
            process_args = [
                'python3', '-m', 'loopchain', 'score', '--channel',
                ChannelProperty().name, '--score_package',
                ChannelProperty().score_package
            ]
            process_args += command_arguments.get_raw_commands_by_filter(
                command_arguments.Type.AMQPTarget,
                command_arguments.Type.AMQPKey, command_arguments.Type.Develop,
                command_arguments.Type.ConfigurationFilePath,
                command_arguments.Type.RadioStationTarget)
            self.__score_container = CommonSubprocess(process_args)

        await StubCollection().create_icon_score_stub(ChannelProperty().name)
        await StubCollection().icon_score_stubs[ChannelProperty().name
                                                ].connect()
        await StubCollection().icon_score_stubs[ChannelProperty().name
                                                ].async_task().hello()
        return None

    async def __load_score(self):
        channel_name = ChannelProperty().name
        score_package_name = ChannelProperty().score_package

        util.logger.spam(f"peer_service:__load_score --init--")
        logging.info("LOAD SCORE AND CONNECT TO SCORE SERVICE!")

        params = dict()
        params[message_code.MetaParams.ScoreLoad.
               repository_path] = conf.DEFAULT_SCORE_REPOSITORY_PATH
        params[message_code.MetaParams.ScoreLoad.
               score_package] = score_package_name
        params[
            message_code.MetaParams.ScoreLoad.base] = conf.DEFAULT_SCORE_BASE
        params[message_code.MetaParams.ScoreLoad.peer_id] = ChannelProperty(
        ).peer_id
        meta = json.dumps(params)
        logging.debug(f"load score params : {meta}")

        util.logger.spam(f"peer_service:__load_score --1--")
        score_stub = StubCollection().score_stubs[channel_name]
        response = await score_stub.async_task().score_load(meta)

        logging.debug("try score load on score service: " + str(response))
        if not response:
            return None

        if response.code != message_code.Response.success:
            util.exit_and_msg("Fail Get Score from Score Server...")
            return None

        logging.debug("Get Score from Score Server...")
        score_info = json.loads(response.meta)

        logging.info("LOAD SCORE DONE!")
        util.logger.spam(f"peer_service:__load_score --end--")

        return score_info

    async def __load_peers_from_file(self):
        channel_info = await StubCollection().peer_stub.async_task(
        ).get_channel_infos()
        for peer_info in channel_info[ChannelProperty().name]["peers"]:
            self.__peer_manager.add_peer(peer_info)
            self.__broadcast_scheduler.schedule_job(BroadcastCommand.SUBSCRIBE,
                                                    peer_info["peer_target"])
        self.show_peers()

    def is_support_node_function(self, node_function):
        return conf.NodeType.is_support_node_function(
            node_function,
            ChannelProperty().node_type)

    def get_channel_option(self) -> dict:
        channel_option = conf.CHANNEL_OPTION
        return channel_option[ChannelProperty().name]

    def get_channel_infos(self) -> dict:
        return self.__channel_infos

    def get_rep_ids(self) -> list:
        return [
            ExternalAddress.fromhex_address(peer.get('id'),
                                            allow_malformed=True)
            for peer in self.get_channel_infos()['peers']
        ]

    def generate_genesis_block(self):
        blockchain = self.block_manager.get_blockchain()
        if blockchain.block_height > -1:
            logging.debug("genesis block was already generated")
            return

        reps = self.get_rep_ids()
        blockchain.generate_genesis_block(reps)

    def connect_to_radio_station(self, is_reconnect=False):
        response = self.__radio_station_stub.call_in_times(
            method_name="ConnectPeer",
            message=loopchain_pb2.ConnectPeerRequest(
                channel=ChannelProperty().name,
                peer_object=b'',
                peer_id=ChannelProperty().peer_id,
                peer_target=ChannelProperty().peer_target,
                group_id=ChannelProperty().group_id),
            retry_times=conf.CONNECTION_RETRY_TIMES_TO_RS,
            is_stub_reuse=True,
            timeout=conf.CONNECTION_TIMEOUT_TO_RS)

        # start next ConnectPeer timer
        self.__timer_service.add_timer_convenient(
            timer_key=TimerService.TIMER_KEY_CONNECT_PEER,
            duration=conf.CONNECTION_RETRY_TIMER,
            callback=self.connect_to_radio_station,
            callback_kwargs={"is_reconnect": True})

        if is_reconnect:
            return

        if response and response.status == message_code.Response.success:
            try:
                peer_list_data = PeerListData.load(response.peer_list)
            except Exception as e:
                traceback.print_exc()
                logging.error(
                    f"Invalid peer list. Check your Radio Station. exception={e}"
                )
                return

            self.__peer_manager.set_peer_list(peer_list_data)
            peers, peer_list = self.__peer_manager.get_peers_for_debug()
            logging.debug("peer list update: " + peers)

            # add connected peer to processes audience
            for each_peer in peer_list:
                util.logger.spam(
                    f"peer_service:connect_to_radio_station peer({each_peer.target}-{each_peer.status})"
                )
                if each_peer.status == PeerStatus.connected:
                    self.__broadcast_scheduler.schedule_job(
                        BroadcastCommand.SUBSCRIBE, each_peer.target)

    def __subscribe_to_peer_list(self):
        peer_object = self.peer_manager.get_peer(ChannelProperty().peer_id)
        peer_request = loopchain_pb2.PeerRequest(
            channel=ChannelProperty().name,
            peer_target=ChannelProperty().peer_target,
            peer_id=ChannelProperty().peer_id,
            group_id=ChannelProperty().group_id,
            node_type=ChannelProperty().node_type,
            peer_order=peer_object.order)
        self.__broadcast_scheduler.schedule_broadcast("Subscribe",
                                                      peer_request)

    async def subscribe_to_radio_station(self):
        await self.__subscribe_call_to_stub(self.__radio_station_stub,
                                            loopchain_pb2.PEER)

    async def subscribe_to_peer(self, peer_id, peer_type):
        peer = self.peer_manager.get_peer(peer_id)
        peer_stub = self.peer_manager.get_peer_stub_manager(peer)

        await self.__subscribe_call_to_stub(peer_stub, peer_type)
        self.__broadcast_scheduler.schedule_job(BroadcastCommand.SUBSCRIBE,
                                                peer_stub.target)

    async def __subscribe_call_to_stub(self, peer_stub, peer_type):
        if self.is_support_node_function(conf.NodeFunction.Vote):
            await peer_stub.call_async(
                "Subscribe",
                loopchain_pb2.PeerRequest(
                    channel=ChannelProperty().name,
                    peer_target=ChannelProperty().peer_target,
                    peer_type=peer_type,
                    peer_id=ChannelProperty().peer_id,
                    group_id=ChannelProperty().group_id,
                    node_type=ChannelProperty().node_type),
            )
        else:
            await self.__subscribe_call_from_citizen()

    async def __subscribe_call_from_citizen(self):
        def _handle_exception(future: asyncio.Future):
            logging.debug(
                f"error: {type(future.exception())}, {str(future.exception())}"
            )

            if ChannelProperty().node_type != conf.NodeType.CitizenNode:
                logging.debug(f"This node is not Citizen anymore.")
                return

            elif isinstance(future.exception(), ConnectionError):
                logging.warning(f"Waiting for next subscribe request...")
                if self.__state_machine.state != "SubscribeNetwork":
                    self.__state_machine.subscribe_network()

        subscribe_event = asyncio.Event()
        util.logger.spam(
            f"try subscribe_call_by_citizen target({ChannelProperty().rest_target})"
        )

        # try websocket connection, and handle exception in callback
        asyncio.ensure_future(
            self.__node_subscriber.subscribe(
                block_height=self.block_manager.get_blockchain().block_height,
                event=subscribe_event)).add_done_callback(_handle_exception)
        await subscribe_event.wait()

    def shutdown_peer(self, **kwargs):
        logging.debug(f"channel_service:shutdown_peer")
        StubCollection().peer_stub.sync_task().stop(message=kwargs['message'])

    def set_peer_type(self, peer_type):
        """Set peer type when peer init only

        :param peer_type:
        :return:
        """
        self.__block_manager.set_peer_type(peer_type)

    def save_peer_manager(self, peer_manager):
        """peer_list 를 leveldb 에 저장한다.

        :param peer_manager:
        """
        level_db_key_name = str.encode(conf.LEVEL_DB_KEY_FOR_PEER_LIST)

        try:
            dump = peer_manager.dump()
            level_db = self.__block_manager.get_level_db()
            level_db.Put(level_db_key_name, dump)
        except AttributeError as e:
            logging.warning("Fail Save Peer_list: " + str(e))

    async def set_peer_type_in_channel(self):
        peer_type = loopchain_pb2.PEER
        blockchain = self.block_manager.get_blockchain()
        last_block = blockchain.last_unconfirmed_block or blockchain.last_block

        leader_id = None
        if last_block and last_block.header.next_leader is not None:
            leader_id = last_block.header.next_leader.hex_hx()
            peer = self.peer_manager.get_peer(leader_id)
            if peer is None:
                leader_id = None
            else:
                self.peer_manager.set_leader_peer(peer)
        if leader_id is None:
            leader_id = self.peer_manager.get_leader_peer().peer_id
        logging.debug(
            f"channel({ChannelProperty().name}) peer_leader: {leader_id}")

        logger_preset = loggers.get_preset()
        if ChannelProperty().peer_id == leader_id:
            logger_preset.is_leader = True
            logging.debug(
                f"Set Peer Type Leader! channel({ChannelProperty().name})")
            peer_type = loopchain_pb2.BLOCK_GENERATOR
        else:
            logger_preset.is_leader = False
        logger_preset.update_logger()

        if conf.CONSENSUS_ALGORITHM == conf.ConsensusAlgorithm.lft:
            self.consensus.leader_id = leader_id

        self.block_manager.set_peer_type(peer_type)

    def __ready_to_height_sync(self):
        blockchain = self.block_manager.get_blockchain()

        blockchain.init_blockchain()
        if blockchain.block_height == -1 and 'genesis_data_path' in conf.CHANNEL_OPTION[
                ChannelProperty().name]:
            self.generate_genesis_block()
        elif blockchain.block_height > -1:
            self.block_manager.rebuild_block()

    def show_peers(self):
        logging.debug(f"peer_service:show_peers ({ChannelProperty().name}): ")
        for peer in self.peer_manager.get_IP_of_peers_in_group():
            logging.debug("peer_target: " + peer)

    def reset_leader(self, new_leader_id, block_height=0, complained=False):
        """

        :param new_leader_id:
        :param block_height:
        :param complained:
        :return:
        """
        if self.peer_manager.get_leader_id(conf.ALL_GROUP_ID) == new_leader_id:
            return

        utils.logger.info(
            f"RESET LEADER channel({ChannelProperty().name}) leader_id({new_leader_id}), "
            f"complained={complained}")
        leader_peer = self.peer_manager.get_peer(new_leader_id, None)

        if block_height > 0 and block_height != self.block_manager.get_blockchain(
        ).last_block.header.height + 1:
            util.logger.warning(
                f"height behind peer can not take leader role. block_height({block_height}), "
                f"last_block.header.height("
                f"{self.block_manager.get_blockchain().last_block.header.height})"
            )
            return

        if leader_peer is None:
            logging.warning(
                f"in peer_service:reset_leader There is no peer by peer_id({new_leader_id})"
            )
            return

        util.logger.spam(
            f"peer_service:reset_leader target({leader_peer.target}), complained={complained}"
        )

        self_peer_object = self.peer_manager.get_peer(
            ChannelProperty().peer_id)
        self.peer_manager.set_leader_peer(leader_peer, None)
        if complained:
            self.block_manager.epoch.new_round(leader_peer.peer_id)
        else:
            self.block_manager.epoch = Epoch.new_epoch(leader_peer.peer_id)
        logging.info(
            f"Epoch height({self.block_manager.epoch.height}), leader ({self.block_manager.epoch.leader_id})"
        )

        if self_peer_object.peer_id == leader_peer.peer_id:
            logging.debug("Set Peer Type Leader!")
            peer_type = loopchain_pb2.BLOCK_GENERATOR
            self.state_machine.turn_to_leader()
        else:
            logging.debug("Set Peer Type Peer!")
            peer_type = loopchain_pb2.PEER
            self.state_machine.turn_to_peer()

        self.block_manager.set_peer_type(peer_type)

    def set_new_leader(self, new_leader_id, block_height=0):
        logging.info(
            f"SET NEW LEADER channel({ChannelProperty().name}) leader_id({new_leader_id})"
        )

        # complained_leader = self.peer_manager.get_leader_peer()
        leader_peer = self.peer_manager.get_peer(new_leader_id, None)

        if block_height > 0 and block_height != self.block_manager.get_blockchain(
        ).last_block.height + 1:
            logging.warning(f"height behind peer can not take leader role.")
            return

        if leader_peer is None:
            logging.warning(
                f"in channel_service:set_new_leader::There is no peer by peer_id({new_leader_id})"
            )
            return

        util.logger.spam(
            f"channel_service:set_new_leader::leader_target({leader_peer.target})"
        )

        self_peer_object = self.peer_manager.get_peer(
            ChannelProperty().peer_id)
        self.peer_manager.set_leader_peer(leader_peer, None)

        peer_leader = self.peer_manager.get_leader_peer()

        if self_peer_object.target == peer_leader.target:
            loggers.get_preset().is_leader = True
            loggers.get_preset().update_logger()

            logging.debug("I'm Leader Peer!")
        else:
            loggers.get_preset().is_leader = False
            loggers.get_preset().update_logger()

            logging.debug("I'm general Peer!")
            # 새 leader 에게 subscribe 하기
            # await self.subscribe_to_radio_station()
            # await self.subscribe_to_peer(peer_leader.peer_id, loopchain_pb2.BLOCK_GENERATOR)

    def genesis_invoke(self, block: Block) -> ('Block', dict):
        method = "icx_sendTransaction"
        transactions = []
        for tx in block.body.transactions.values():
            tx_serializer = TransactionSerializer.new(
                tx.version,
                self.block_manager.get_blockchain().tx_versioner)
            transaction = {
                "method": method,
                "params": {
                    "txHash": tx.hash.hex()
                },
                "genesisData": tx_serializer.to_full_data(tx)
            }
            transactions.append(transaction)

        request = {
            'block': {
                'blockHeight': block.header.height,
                'blockHash': block.header.hash.hex(),
                'timestamp': block.header.timestamp
            },
            'transactions': transactions
        }
        request = convert_params(request, ParamType.invoke)
        stub = StubCollection().icon_score_stubs[ChannelProperty().name]
        response = stub.sync_task().invoke(request)
        response_to_json_query(response)

        tx_receipts = response["txResults"]
        block_builder = BlockBuilder.from_new(
            block,
            self.block_manager.get_blockchain().tx_versioner)
        block_builder.reset_cache()
        block_builder.peer_id = block.header.peer_id
        block_builder.signature = block.header.signature

        block_builder.commit_state = {
            ChannelProperty().name: response['stateRootHash']
        }
        block_builder.state_hash = Hash32(
            bytes.fromhex(response['stateRootHash']))
        block_builder.receipts = tx_receipts
        block_builder.reps = self.get_rep_ids()
        new_block = block_builder.build()
        return new_block, tx_receipts

    def score_invoke(self, _block: Block) -> dict or None:
        method = "icx_sendTransaction"
        transactions = []
        for tx in _block.body.transactions.values():
            tx_serializer = TransactionSerializer.new(
                tx.version,
                self.block_manager.get_blockchain().tx_versioner)

            transaction = {
                "method": method,
                "params": tx_serializer.to_full_data(tx)
            }
            transactions.append(transaction)

        request = {
            'block': {
                'blockHeight':
                _block.header.height,
                'blockHash':
                _block.header.hash.hex(),
                'prevBlockHash':
                _block.header.prev_hash.hex()
                if _block.header.prev_hash else '',
                'timestamp':
                _block.header.timestamp
            },
            'transactions': transactions
        }
        request = convert_params(request, ParamType.invoke)
        stub = StubCollection().icon_score_stubs[ChannelProperty().name]
        response = stub.sync_task().invoke(request)
        response_to_json_query(response)

        tx_receipts = response["txResults"]
        block_builder = BlockBuilder.from_new(
            _block,
            self.__block_manager.get_blockchain().tx_versioner)
        block_builder.reset_cache()
        block_builder.peer_id = _block.header.peer_id
        block_builder.signature = _block.header.signature

        block_builder.commit_state = {
            ChannelProperty().name: response['stateRootHash']
        }
        block_builder.state_hash = Hash32(
            bytes.fromhex(response['stateRootHash']))
        block_builder.receipts = tx_receipts
        block_builder.reps = self.get_rep_ids()
        new_block = block_builder.build()
        return new_block, tx_receipts

    def score_change_block_hash(self, block_height, old_block_hash,
                                new_block_hash):
        change_hash_info = json.dumps({
            "block_height": block_height,
            "old_block_hash": old_block_hash,
            "new_block_hash": new_block_hash
        })

        stub = StubCollection().score_stubs[ChannelProperty().name]
        stub.sync_task().change_block_hash(change_hash_info)

    def score_write_precommit_state(self, block: Block):
        logging.debug(
            f"call score commit {ChannelProperty().name} {block.header.height} {block.header.hash.hex()}"
        )

        request = {
            "blockHeight": block.header.height,
            "blockHash": block.header.hash.hex(),
        }
        request = convert_params(request, ParamType.write_precommit_state)

        stub = StubCollection().icon_score_stubs[ChannelProperty().name]
        stub.sync_task().write_precommit_state(request)
        return True

    def score_remove_precommit_state(self, block: Block):
        invoke_fail_info = json.dumps({
            "block_height": block.height,
            "block_hash": block.block_hash
        })
        stub = StubCollection().score_stubs[ChannelProperty().name]
        stub.sync_task().remove_precommit_state(invoke_fail_info)
        return True

    def reset_leader_complain_timer(self):
        if self.__timer_service.get_timer(
                TimerService.TIMER_KEY_LEADER_COMPLAIN):
            self.stop_leader_complain_timer()

        self.start_leader_complain_timer()

    def start_leader_complain_timer_if_tx_exists(self):
        if not self.block_manager.get_tx_queue().is_empty_in_status(
                TransactionStatusInQueue.normal):
            util.logger.debug(
                "Start leader complain timer because unconfirmed tx exists.")
            self.start_leader_complain_timer()

    def start_leader_complain_timer(self, duration=None):
        if not duration:
            duration = self.block_manager.epoch.complain_duration

        # util.logger.spam(
        #     f"start_leader_complain_timer in channel service. ({self.block_manager.epoch.round}/{duration})")
        if self.state_machine.state not in ("BlockGenerate", "BlockSync",
                                            "Watch"):
            self.__timer_service.add_timer_convenient(
                timer_key=TimerService.TIMER_KEY_LEADER_COMPLAIN,
                duration=duration,
                is_repeat=True,
                callback=self.state_machine.leader_complain)

    def stop_leader_complain_timer(self):
        util.logger.spam(f"stop_leader_complain_timer in channel service.")
        self.__timer_service.stop_timer(TimerService.TIMER_KEY_LEADER_COMPLAIN)

    def start_subscribe_timer(self):
        self.__timer_service.add_timer_convenient(
            timer_key=TimerService.TIMER_KEY_SUBSCRIBE,
            duration=conf.SUBSCRIBE_RETRY_TIMER,
            is_repeat=True,
            callback=self.subscribe_network)

    def stop_subscribe_timer(self):
        self.__timer_service.stop_timer(TimerService.TIMER_KEY_SUBSCRIBE)

    def start_shutdown_timer(self):
        error = f"Shutdown by Subscribe retry timeout({conf.SHUTDOWN_TIMER} sec)"
        self.__timer_service.add_timer_convenient(
            timer_key=TimerService.TIMER_KEY_SHUTDOWN_WHEN_FAIL_SUBSCRIBE,
            duration=conf.SHUTDOWN_TIMER,
            callback=self.shutdown_peer,
            callback_kwargs={"message": error})

    def stop_shutdown_timer(self):
        self.__timer_service.stop_timer(
            TimerService.TIMER_KEY_SHUTDOWN_WHEN_FAIL_SUBSCRIBE)