lib.rs

			transaction_pool: transaction_pool.clone(),
			spawn_handle: task_manager.spawn_handle(),
			import_queue,
			on_demand: Some(on_demand.clone()),
			block_announce_validator_builder: None,
		})?;

	if config.offchain_worker.enabled {
		let _ = service::build_offchain_workers(
			&config,
			backend.clone(),
			task_manager.spawn_handle(),
			client.clone(),
			network.clone(),
		);
	}

	let light_deps = polkadot_rpc::LightDeps {
		remote_blockchain: backend.remote_blockchain(),
		fetcher: on_demand.clone(),
		client: client.clone(),
		pool: transaction_pool.clone(),
	};

	let rpc_extensions = polkadot_rpc::create_light(light_deps);

	let telemetry_span = TelemetrySpan::new();
	let _telemetry_span_entered = telemetry_span.enter();

	let (rpc_handlers, telemetry_connection_notifier) = service::spawn_tasks(service::SpawnTasksParams {
		on_demand: Some(on_demand),
		remote_blockchain: Some(backend.remote_blockchain()),
		rpc_extensions_builder: Box::new(service::NoopRpcExtensionBuilder(rpc_extensions)),
		task_manager: &mut task_manager,
		config,
		keystore: keystore_container.sync_keystore(),
		backend,
		transaction_pool,
		client,
		network,
		network_status_sinks,
		system_rpc_tx,
		telemetry_span: Some(telemetry_span.clone()),
	})?;

	network_starter.start_network();

	Ok((task_manager, rpc_handlers, telemetry_connection_notifier))
}

/// Builds a new object suitable for chain operations.
#[cfg(feature = "full-node")]
pub fn new_chain_ops(mut config: &mut Configuration, jaeger_agent: Option<std::net::SocketAddr>) -> Result<
	(
		Arc<Client>,
		Arc<FullBackend>,
		consensus_common::import_queue::BasicQueue<Block, PrefixedMemoryDB<BlakeTwo256>>,
		TaskManager,
	),
	Error
>
{
	config.keystore = service::config::KeystoreConfig::InMemory;
	if config.chain_spec.is_rococo() {
		let service::PartialComponents { client, backend, import_queue, task_manager, .. }
			= new_partial::<rococo_runtime::RuntimeApi, RococoExecutor>(config, jaeger_agent)?;
		Ok((Arc::new(Client::Rococo(client)), backend, import_queue, task_manager))
	} else if config.chain_spec.is_kusama() {
		let service::PartialComponents { client, backend, import_queue, task_manager, .. }
			= new_partial::<kusama_runtime::RuntimeApi, KusamaExecutor>(config, jaeger_agent)?;
		Ok((Arc::new(Client::Kusama(client)), backend, import_queue, task_manager))
	} else if config.chain_spec.is_westend() {
		let service::PartialComponents { client, backend, import_queue, task_manager, .. }
			= new_partial::<westend_runtime::RuntimeApi, WestendExecutor>(config, jaeger_agent)?;
		Ok((Arc::new(Client::Westend(client)), backend, import_queue, task_manager))
	} else {
		let service::PartialComponents { client, backend, import_queue, task_manager, .. }
			= new_partial::<polkadot_runtime::RuntimeApi, PolkadotExecutor>(config, jaeger_agent)?;
		Ok((Arc::new(Client::Polkadot(client)), backend, import_queue, task_manager))
	}
}

/// Build a new light node.
pub fn build_light(config: Configuration) -> Result<(
	TaskManager,
	RpcHandlers,
	Option<TelemetryConnectionNotifier>,
), Error> {
	if config.chain_spec.is_rococo() {
		new_light::<rococo_runtime::RuntimeApi, RococoExecutor>(config)
	} else if config.chain_spec.is_kusama() {
		new_light::<kusama_runtime::RuntimeApi, KusamaExecutor>(config)
	} else if config.chain_spec.is_westend() {
		new_light::<westend_runtime::RuntimeApi, WestendExecutor>(config)
	} else {
		new_light::<polkadot_runtime::RuntimeApi, PolkadotExecutor>(config)
	}
}

#[cfg(feature = "full-node")]
pub fn build_full(
	config: Configuration,
	is_collator: IsCollator,
	grandpa_pause: Option<(u32, u32)>,
	jaeger_agent: Option<std::net::SocketAddr>,
) -> Result<NewFull<Client>, Error> {
	let isolation_strategy = {
		#[cfg(not(any(target_os = "android", target_os = "unknown")))]
		{
			let cache_base_path = config.database.path();
			IsolationStrategy::external_process_with_caching(cache_base_path)
		}

		#[cfg(any(target_os = "android", target_os = "unknown"))]
		{
			IsolationStrategy::InProcess
		}
	};

	if config.chain_spec.is_rococo() {
		new_full::<rococo_runtime::RuntimeApi, RococoExecutor>(
			config,
			is_collator,
			grandpa_pause,
			jaeger_agent,
			isolation_strategy,
		).map(|full| full.with_client(Client::Rococo))
	} else if config.chain_spec.is_kusama() {
		new_full::<kusama_runtime::RuntimeApi, KusamaExecutor>(
			config,
			is_collator,
			grandpa_pause,
			jaeger_agent,
			isolation_strategy,
		).map(|full| full.with_client(Client::Kusama))
	} else if config.chain_spec.is_westend() {
		new_full::<westend_runtime::RuntimeApi, WestendExecutor>(
			config,
			is_collator,
			grandpa_pause,
			jaeger_agent,
			isolation_strategy,
		).map(|full| full.with_client(Client::Westend))
	} else {
		new_full::<polkadot_runtime::RuntimeApi, PolkadotExecutor>(
			config,
			is_collator,
			grandpa_pause,
			jaeger_agent,
			isolation_strategy,
		).map(|full| full.with_client(Client::Polkadot))
	}
}