Removal of light client from substrate (#9684)

* Removal of light client from substrate

* add missing import

* These tests relate to there being light and non light clients.

* removing lightnodes from test

* cargo fmt

* not needed

* LightDataChecker not needed any longer

* cargo fmt

* Update client/service/test/src/lib.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* Update client/service/test/src/lib.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* cargo fmt

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

substrate/bin/node-template/node/src/service.rs

@@ -1,7 +1,7 @@
 //! Service and ServiceFactory implementation. Specialized wrapper over substrate service.
 
 use node_template_runtime::{self, opaque::Block, RuntimeApi};
-use sc_client_api::{ExecutorProvider, RemoteBackend};
+use sc_client_api::ExecutorProvider;
 use sc_consensus_aura::{ImportQueueParams, SlotProportion, StartAuraParams};
 pub use sc_executor::NativeElseWasmExecutor;
 use sc_finality_grandpa::SharedVoterState;
@@ -336,144 +336,3 @@ pub fn new_full(mut config: Configuration) -> Result<TaskManager, ServiceError>
 	network_starter.start_network();
 	Ok(task_manager)
 }
-
-/// Builds a new service for a light client.
-pub fn new_light(mut config: Configuration) -> Result<TaskManager, ServiceError> {
-	let telemetry = config
-		.telemetry_endpoints
-		.clone()
-		.filter(|x| !x.is_empty())
-		.map(|endpoints| -> Result<_, sc_telemetry::Error> {
-			let worker = TelemetryWorker::new(16)?;
-			let telemetry = worker.handle().new_telemetry(endpoints);
-			Ok((worker, telemetry))
-		})
-		.transpose()?;
-
-	let executor = NativeElseWasmExecutor::<ExecutorDispatch>::new(
-		config.wasm_method,
-		config.default_heap_pages,
-		config.max_runtime_instances,
-	);
-
-	let (client, backend, keystore_container, mut task_manager, on_demand) =
-		sc_service::new_light_parts::<Block, RuntimeApi, _>(
-			&config,
-			telemetry.as_ref().map(|(_, telemetry)| telemetry.handle()),
-			executor,
-		)?;
-
-	let mut telemetry = telemetry.map(|(worker, telemetry)| {
-		task_manager.spawn_handle().spawn("telemetry", worker.run());
-		telemetry
-	});
-
-	config.network.extra_sets.push(sc_finality_grandpa::grandpa_peers_set_config());
-
-	let select_chain = sc_consensus::LongestChain::new(backend.clone());
-
-	let transaction_pool = Arc::new(sc_transaction_pool::BasicPool::new_light(
-		config.transaction_pool.clone(),
-		config.prometheus_registry(),
-		task_manager.spawn_essential_handle(),
-		client.clone(),
-		on_demand.clone(),
-	));
-
-	let (grandpa_block_import, grandpa_link) = sc_finality_grandpa::block_import(
-		client.clone(),
-		&(client.clone() as Arc<_>),
-		select_chain.clone(),
-		telemetry.as_ref().map(|x| x.handle()),
-	)?;
-
-	let slot_duration = sc_consensus_aura::slot_duration(&*client)?.slot_duration();
-
-	let import_queue =
-		sc_consensus_aura::import_queue::<AuraPair, _, _, _, _, _, _>(ImportQueueParams {
-			block_import: grandpa_block_import.clone(),
-			justification_import: Some(Box::new(grandpa_block_import.clone())),
-			client: client.clone(),
-			create_inherent_data_providers: move |_, ()| async move {
-				let timestamp = sp_timestamp::InherentDataProvider::from_system_time();
-
-				let slot =
-					sp_consensus_aura::inherents::InherentDataProvider::from_timestamp_and_duration(
-						*timestamp,
-						slot_duration,
-					);
-
-				Ok((timestamp, slot))
-			},
-			spawner: &task_manager.spawn_essential_handle(),
-			can_author_with: sp_consensus::NeverCanAuthor,
-			registry: config.prometheus_registry(),
-			check_for_equivocation: Default::default(),
-			telemetry: telemetry.as_ref().map(|x| x.handle()),
-		})?;
-
-	let warp_sync = Arc::new(sc_finality_grandpa::warp_proof::NetworkProvider::new(
-		backend.clone(),
-		grandpa_link.shared_authority_set().clone(),
-		Vec::default(),
-	));
-
-	let (network, system_rpc_tx, network_starter) =
-		sc_service::build_network(sc_service::BuildNetworkParams {
-			config: &config,
-			client: client.clone(),
-			transaction_pool: transaction_pool.clone(),
-			spawn_handle: task_manager.spawn_handle(),
-			import_queue,
-			on_demand: Some(on_demand.clone()),
-			block_announce_validator_builder: None,
-			warp_sync: Some(warp_sync),
-		})?;
-
-	if config.offchain_worker.enabled {
-		sc_service::build_offchain_workers(
-			&config,
-			task_manager.spawn_handle(),
-			client.clone(),
-			network.clone(),
-		);
-	}
-
-	let enable_grandpa = !config.disable_grandpa;
-	if enable_grandpa {
-		let name = config.network.node_name.clone();
-
-		let config = sc_finality_grandpa::Config {
-			gossip_duration: std::time::Duration::from_millis(333),
-			justification_period: 512,
-			name: Some(name),
-			observer_enabled: false,
-			keystore: None,
-			local_role: config.role.clone(),
-			telemetry: telemetry.as_ref().map(|x| x.handle()),
-		};
-
-		task_manager.spawn_handle().spawn_blocking(
-			"grandpa-observer",
-			sc_finality_grandpa::run_grandpa_observer(config, grandpa_link, network.clone())?,
-		);
-	}
-
-	sc_service::spawn_tasks(sc_service::SpawnTasksParams {
-		remote_blockchain: Some(backend.remote_blockchain()),
-		transaction_pool,
-		task_manager: &mut task_manager,
-		on_demand: Some(on_demand),
-		rpc_extensions_builder: Box::new(|_, _| Ok(())),
-		config,
-		client,
-		keystore: keystore_container.sync_keystore(),
-		backend,
-		network,
-		system_rpc_tx,
-		telemetry: telemetry.as_mut(),
-	})?;
-
-	network_starter.start_network();
-	Ok(task_manager)
-}