Companion PR for Remove the service, replacing it with a struct of individual chain components (#1288)

* Switch branch

* Fix service things

* Fix browser node compilation

* Update branch

* fixed new service

* Update for new branch

* Fix browser node

* Update branch

* Revert "Switch branch"

This reverts commit 3623adff7681124a1539a385a718c34e85931254.

* Update cargo.lock

Co-authored-by: Bastian Köcher <git@kchr.de>

polkadot/cli/src/browser.rs

@@ -46,8 +46,8 @@ async fn start_inner(chain_spec: String, log_level: String) -> Result<Client, Bo
 	info!("👤 Role: {}", config.display_role());
 
 	// Create the service. This is the most heavy initialization step.
-	let service = service::kusama_new_light(config)
+	let (task_manager, rpc_handlers) = service::kusama_new_light(config)
 		.map_err(|e| format!("{:?}", e))?;
 
-	Ok(browser_utils::start_client(service))
+	Ok(browser_utils::start_client(task_manager, rpc_handlers))
 }

polkadot/cli/src/command.rs

@@ -19,8 +19,7 @@ use log::info;
 use service::{IdentifyVariant, self};
 #[cfg(feature = "service-rewr")]
 use service_new::{IdentifyVariant, self as service};
-use sc_executor::NativeExecutionDispatch;
+use sc_cli::{SubstrateCli, Result, RuntimeVersion, Role};
-use sc_cli::{SubstrateCli, Result};
 use crate::cli::{Cli, Subcommand};
 
 fn get_exec_name() -> Option<String> {
@@ -75,6 +74,16 @@ impl SubstrateCli for Cli {
 			path => Box::new(service::PolkadotChainSpec::from_json_file(std::path::PathBuf::from(path))?),
 		})
 	}
+
+	fn native_runtime_version(spec: &Box<dyn service::ChainSpec>) -> &'static RuntimeVersion {
+		if spec.is_kusama() {
+			&service::kusama_runtime::VERSION
+		} else if spec.is_westend() {
+			&service::westend_runtime::VERSION
+		} else {
+			&service::polkadot_runtime::VERSION
+		}
+	}
 }
 
 /// Parses polkadot specific CLI arguments and run the service.
@@ -116,56 +125,44 @@ pub fn run() -> Result<()> {
 				info!("     KUSAMA FOUNDATION      ");
 				info!("----------------------------");
 
-				runtime.run_node(
+				runtime.run_node_until_exit(|config| match config.role {
-					|config| {
+					Role::Light => service::kusama_new_light(config)
-						service::kusama_new_light(config)
+						.map(|(components, _)| components),
-					},
+					_ => service::kusama_new_full(
-					|config| {
-						service::kusama_new_full(
 						config,
 						None,
 						None,
 						authority_discovery_enabled,
 						6000,
 						grandpa_pause,
-						).map(|(s, _, _)| s)
+					).map(|(components, _, _)| components)
-					},
+				})
-					service::KusamaExecutor::native_version().runtime_version
-				)
 			} else if chain_spec.is_westend() {
-				runtime.run_node(
+				runtime.run_node_until_exit(|config| match config.role {
-					|config| {
+					Role::Light => service::westend_new_light(config)
-						service::westend_new_light(config)
+						.map(|(components, _)| components),
-					},
+					_ => service::westend_new_full(
-					|config| {
-						service::westend_new_full(
 						config,
 						None,
 						None,
 						authority_discovery_enabled,
 						6000,
 						grandpa_pause,
-						).map(|(s, _, _)| s)
+					).map(|(components, _, _)| components)
-					},
+				})
-					service::WestendExecutor::native_version().runtime_version
-				)
 			} else {
-				runtime.run_node(
+				runtime.run_node_until_exit(|config| match config.role {
-					|config| {
+					Role::Light => service::polkadot_new_light(config)
-						service::polkadot_new_light(config)
+						.map(|(components, _)| components),
-					},
+					_ => service::polkadot_new_full(
-					|config| {
-						service::polkadot_new_full(
 						config,
 						None,
 						None,
 						authority_discovery_enabled,
 						6000,
 						grandpa_pause,
-						).map(|(s, _, _)| s)
+					).map(|(components, _, _)| components)
-					},
+				})
-					service::PolkadotExecutor::native_version().runtime_version
-				)
 			}
 		},
 		Some(Subcommand::Base(subcommand)) => {

polkadot/cli/src/lib.rs

@@ -28,14 +28,14 @@ mod command;
 
 #[cfg(not(feature = "service-rewr"))]
 pub use service::{
-	AbstractService, ProvideRuntimeApi, CoreApi, ParachainHost, IdentifyVariant,
+	ProvideRuntimeApi, CoreApi, ParachainHost, IdentifyVariant,
 	Block, self, RuntimeApiCollection, TFullClient
 };
 
 #[cfg(feature = "service-rewr")]
 pub use service_new::{
 	self as service,
-	AbstractService, ProvideRuntimeApi, CoreApi, ParachainHost, IdentifyVariant,
+	ProvideRuntimeApi, CoreApi, ParachainHost, IdentifyVariant,
 	Block, self, RuntimeApiCollection, TFullClient
 };
 

polkadot/collator/src/lib.rs

@@ -63,7 +63,7 @@ use polkadot_primitives::{
 	}
 };
 use polkadot_cli::{
-	ProvideRuntimeApi, AbstractService, ParachainHost, IdentifyVariant,
+	ProvideRuntimeApi, ParachainHost, IdentifyVariant,
 	service::{self, Role}
 };
 pub use polkadot_cli::service::Configuration;
@@ -386,7 +386,7 @@ where
 	}
 
 	if config.chain_spec.is_kusama() {
-		let (service, client, handlers) = service::kusama_new_full(
+		let (task_manager, client, handlers) = service::kusama_new_full(
 			config,
 			Some((key.public(), para_id)),
 			None,
@@ -394,7 +394,7 @@ where
 			6000,
 			None,
 		)?;
-		let spawn_handle = service.spawn_task_handle();
+		let spawn_handle = task_manager.spawn_handle();
 		build_collator_service(
 			spawn_handle,
 			handlers,
@@ -404,7 +404,7 @@ where
 			build_parachain_context
 		)?.await;
 	} else if config.chain_spec.is_westend() {
-		let (service, client, handlers) = service::westend_new_full(
+		let (task_manager, client, handlers) = service::westend_new_full(
 			config,
 			Some((key.public(), para_id)),
 			None,
@@ -412,7 +412,7 @@ where
 			6000,
 			None,
 		)?;
-		let spawn_handle = service.spawn_task_handle();
+		let spawn_handle = task_manager.spawn_handle();
 		build_collator_service(
 			spawn_handle,
 			handlers,
@@ -422,7 +422,7 @@ where
 			build_parachain_context
 		)?.await;
 	} else {
-		let (service, client, handles) = service::polkadot_new_full(
+		let (task_manager, client, handles) = service::polkadot_new_full(
 			config,
 			Some((key.public(), para_id)),
 			None,
@@ -430,7 +430,7 @@ where
 			6000,
 			None,
 		)?;
-		let spawn_handle = service.spawn_task_handle();
+		let spawn_handle = task_manager.spawn_handle();
 		build_collator_service(
 			spawn_handle,
 			handles,

polkadot/node/service/src/lib.rs

@@ -35,9 +35,9 @@ use polkadot_overseer::{
 	CandidateValidationMessage, CandidateBackingMessage,
 };
 pub use service::{
-	AbstractService, Role, PruningMode, TransactionPoolOptions, Error, RuntimeGenesis,
+	Role, PruningMode, TransactionPoolOptions, Error, RuntimeGenesis,
 	TFullClient, TLightClient, TFullBackend, TLightBackend, TFullCallExecutor, TLightCallExecutor,
-	Configuration, ChainSpec, ServiceBuilderCommand,
+	Configuration, ChainSpec, ServiceBuilderCommand, ServiceComponents, TaskManager,
 };
 pub use service::config::{DatabaseConfig, PrometheusConfig};
 pub use sc_executor::NativeExecutionDispatch;
@@ -321,7 +321,10 @@ macro_rules! new_full {
 		let (builder, mut import_setup, inherent_data_providers, mut rpc_setup) =
 			new_full_start!($config, $runtime, $dispatch);
 
-		let service = builder
+		let ServiceComponents {
+			client, network, select_chain, keystore, transaction_pool, prometheus_registry,
+			task_manager, telemetry_on_connect_sinks, ..
+		} = builder
 			.with_finality_proof_provider(|client, backend| {
 				let provider = client as Arc<dyn grandpa::StorageAndProofProvider<_, _>>;
 				Ok(Arc::new(GrandpaFinalityProofProvider::new(backend, provider)) as _)
@@ -334,11 +337,9 @@ macro_rules! new_full {
 		let shared_voter_state = rpc_setup.take()
 			.expect("The SharedVoterState is present for Full Services or setup failed before. qed");
 
-		let client = service.client();
+		let overseer_client = client.clone();
-
+		let spawner = task_manager.spawn_handle();
-		let overseer_client = service.client();
+		let leaves: Vec<_> = select_chain.clone().ok_or(ServiceError::SelectChainRequired)?
-		let spawner = service.spawn_task_handle();
-		let leaves: Vec<_> = service.select_chain().ok_or(ServiceError::SelectChainRequired)?
 			.leaves()
 			.unwrap_or_else(|_| vec![])
 			.into_iter()
@@ -356,7 +357,7 @@ macro_rules! new_full {
 
 		let (overseer, handler) = real_overseer(leaves, spawner)?;
 
-		service.spawn_essential_task_handle().spawn("overseer", Box::pin(async move {
+		task_manager.spawn_essential_handle().spawn_blocking("overseer", Box::pin(async move {
 			use futures::{pin_mut, select, FutureExt};
 
 			let forward = overseer::forward_events(overseer_client, handler);
@@ -377,24 +378,24 @@ macro_rules! new_full {
 		}));
 
 		if role.is_authority() {
-			let select_chain = service.select_chain().ok_or(ServiceError::SelectChainRequired)?;
+			let select_chain = select_chain.ok_or(ServiceError::SelectChainRequired)?;
 			let can_author_with =
 				consensus_common::CanAuthorWithNativeVersion::new(client.executor().clone());
 
 			// TODO: custom proposer (https://github.com/paritytech/polkadot/issues/1248)
 			let proposer = sc_basic_authorship::ProposerFactory::new(
 				client.clone(),
-				service.transaction_pool(),
+				transaction_pool,
 				None,
 			);
 
 			let babe_config = babe::BabeParams {
-				keystore: service.keystore(),
+				keystore: keystore.clone(),
 				client: client.clone(),
 				select_chain,
 				block_import,
 				env: proposer,
-				sync_oracle: service.network(),
+				sync_oracle: network.clone(),
 				inherent_data_providers: inherent_data_providers.clone(),
 				force_authoring,
 				babe_link,
@@ -402,13 +403,13 @@ macro_rules! new_full {
 			};
 
 			let babe = babe::start_babe(babe_config)?;
-			service.spawn_essential_task_handle().spawn_blocking("babe", babe);
+			task_manager.spawn_essential_handle().spawn_blocking("babe", babe);
 		}
 
 		// if the node isn't actively participating in consensus then it doesn't
 		// need a keystore, regardless of which protocol we use below.
 		let keystore = if is_authority {
-			Some(service.keystore() as BareCryptoStorePtr)
+			Some(keystore.clone() as BareCryptoStorePtr)
 		} else {
 			None
 		};
@@ -454,15 +455,15 @@ macro_rules! new_full {
 			let grandpa_config = grandpa::GrandpaParams {
 				config,
 				link: link_half,
-				network: service.network(),
+				network: network.clone(),
 				inherent_data_providers: inherent_data_providers.clone(),
-				telemetry_on_connect: Some(service.telemetry_on_connect_stream()),
+				telemetry_on_connect: Some(telemetry_on_connect_sinks.on_connect_stream()),
 				voting_rule,
-				prometheus_registry: service.prometheus_registry(),
+				prometheus_registry: prometheus_registry,
 				shared_voter_state,
 			};
 
-			service.spawn_essential_task_handle().spawn_blocking(
+			task_manager.spawn_essential_handle().spawn_blocking(
 				"grandpa-voter",
 				grandpa::run_grandpa_voter(grandpa_config)?
 			);
@@ -470,11 +471,11 @@ macro_rules! new_full {
 			grandpa::setup_disabled_grandpa(
 				client.clone(),
 				&inherent_data_providers,
-				service.network(),
+				network.clone(),
 			)?;
 		}
 
-		(service, client)
+		(task_manager, client)
 	}}
 }
 
@@ -566,6 +567,7 @@ macro_rules! new_light {
 				Ok(polkadot_rpc::create_light(light_deps))
 			})?
 			.build_light()
+			.map(|ServiceComponents { task_manager, .. }| task_manager)
 	}}
 }
 
@@ -595,7 +597,7 @@ pub fn polkadot_new_full(
 	grandpa_pause: Option<(u32, u32)>,
 )
 	-> Result<(
-		impl AbstractService,
+		TaskManager,
 		Arc<impl PolkadotClient<
 			Block,
 			TFullBackend<Block>,
@@ -604,7 +606,7 @@ pub fn polkadot_new_full(
 		FullNodeHandles,
 	), ServiceError>
 {
-	let (service, client) = new_full!(
+	let (components, client) = new_full!(
 		config,
 		collating_for,
 		authority_discovery_enabled,
@@ -613,7 +615,7 @@ pub fn polkadot_new_full(
 		PolkadotExecutor,
 	);
 
-	Ok((service, client, FullNodeHandles))
+	Ok((components, client, FullNodeHandles))
 }
 
 /// Create a new Kusama service for a full node.
@@ -626,7 +628,7 @@ pub fn kusama_new_full(
 	_slot_duration: u64,
 	grandpa_pause: Option<(u32, u32)>,
 ) -> Result<(
-		impl AbstractService,
+		TaskManager,
 		Arc<impl PolkadotClient<
 			Block,
 			TFullBackend<Block>,
@@ -636,7 +638,7 @@ pub fn kusama_new_full(
 		FullNodeHandles,
 	), ServiceError>
 {
-	let (service, client) = new_full!(
+	let (components, client) = new_full!(
 		config,
 		collating_for,
 		authority_discovery_enabled,
@@ -645,7 +647,7 @@ pub fn kusama_new_full(
 		KusamaExecutor,
 	);
 
-	Ok((service, client, FullNodeHandles))
+	Ok((components, client, FullNodeHandles))
 }
 
 /// Create a new Kusama service for a full node.
@@ -659,7 +661,7 @@ pub fn westend_new_full(
 	grandpa_pause: Option<(u32, u32)>,
 )
 	-> Result<(
-		impl AbstractService,
+		TaskManager,
 		Arc<impl PolkadotClient<
 			Block,
 			TFullBackend<Block>,
@@ -668,7 +670,7 @@ pub fn westend_new_full(
 		FullNodeHandles,
 	), ServiceError>
 {
-	let (service, client) = new_full!(
+	let (components, client) = new_full!(
 		config,
 		collating_for,
 		authority_discovery_enabled,
@@ -677,45 +679,23 @@ pub fn westend_new_full(
 		WestendExecutor,
 	);
 
-	Ok((service, client, FullNodeHandles))
+	Ok((components, client, FullNodeHandles))
 }
 
 /// Create a new Polkadot service for a light client.
-pub fn polkadot_new_light(mut config: Configuration) -> Result<
+pub fn polkadot_new_light(mut config: Configuration) -> Result<TaskManager, ServiceError>
-	impl AbstractService<
-		Block = Block,
-		RuntimeApi = polkadot_runtime::RuntimeApi,
-		Backend = TLightBackend<Block>,
-		SelectChain = LongestChain<TLightBackend<Block>, Block>,
-		CallExecutor = TLightCallExecutor<Block, PolkadotExecutor>,
-	>, ServiceError>
 {
 	new_light!(config, polkadot_runtime::RuntimeApi, PolkadotExecutor)
 }
 
 /// Create a new Kusama service for a light client.
-pub fn kusama_new_light(mut config: Configuration) -> Result<
+pub fn kusama_new_light(mut config: Configuration) -> Result<TaskManager, ServiceError>
-	impl AbstractService<
-		Block = Block,
-		RuntimeApi = kusama_runtime::RuntimeApi,
-		Backend = TLightBackend<Block>,
-		SelectChain = LongestChain<TLightBackend<Block>, Block>,
-		CallExecutor = TLightCallExecutor<Block, KusamaExecutor>,
-	>, ServiceError>
 {
 	new_light!(config, kusama_runtime::RuntimeApi, KusamaExecutor)
 }
 
 /// Create a new Westend service for a light client.
-pub fn westend_new_light(mut config: Configuration, ) -> Result<
+pub fn westend_new_light(mut config: Configuration, ) -> Result<TaskManager, ServiceError>
-	impl AbstractService<
-		Block = Block,
-		RuntimeApi = westend_runtime::RuntimeApi,
-		Backend = TLightBackend<Block>,
-		SelectChain = LongestChain<TLightBackend<Block>, Block>,
-		CallExecutor = TLightCallExecutor<Block, KusamaExecutor>
-	>,
-	ServiceError>
 {
 	new_light!(config, westend_runtime::RuntimeApi, KusamaExecutor)
 }

polkadot/service/src/lib.rs

@@ -30,9 +30,9 @@ use grandpa::{self, FinalityProofProvider as GrandpaFinalityProofProvider};
 use sc_executor::native_executor_instance;
 use log::info;
 pub use service::{
-	AbstractService, Role, PruningMode, TransactionPoolOptions, Error, RuntimeGenesis,
+	Role, PruningMode, TransactionPoolOptions, Error, RuntimeGenesis, RpcHandlers,
 	TFullClient, TLightClient, TFullBackend, TLightBackend, TFullCallExecutor, TLightCallExecutor,
-	Configuration, ChainSpec, ServiceBuilderCommand,
+	Configuration, ChainSpec, ServiceBuilderCommand, ServiceComponents, TaskManager,
 };
 pub use service::config::{DatabaseConfig, PrometheusConfig};
 pub use sc_executor::NativeExecutionDispatch;
@@ -298,7 +298,10 @@ macro_rules! new_full {
 		let (builder, mut import_setup, inherent_data_providers, mut rpc_setup) =
 			new_full_start!($config, $runtime, $dispatch);
 
-		let service = builder
+		let ServiceComponents {
+			client, network, select_chain, keystore, transaction_pool, prometheus_registry,
+			task_manager, telemetry_on_connect_sinks, ..
+		} = builder
 			.with_finality_proof_provider(|client, backend| {
 				let provider = client as Arc<dyn grandpa::StorageAndProofProvider<_, _>>;
 				Ok(Arc::new(GrandpaFinalityProofProvider::new(backend, provider)) as _)
@@ -311,16 +314,10 @@ macro_rules! new_full {
 		let shared_voter_state = rpc_setup.take()
 			.expect("The SharedVoterState is present for Full Services or setup failed before. qed");
 
-		let client = service.client();
 		let known_oracle = client.clone();
 
 		let mut handles = FullNodeHandles::default();
-		let select_chain = if let Some(select_chain) = service.select_chain() {
+		let select_chain = select_chain.ok_or(ServiceError::SelectChainRequired)?;
-			select_chain
-		} else {
-			info!("The node cannot start as an authority because it can't select chain.");
-			return Ok((service, client, handles));
-		};
 		let gossip_validator_select_chain = select_chain.clone();
 
 		let is_known = move |block_hash: &Hash| {
@@ -343,13 +340,13 @@ macro_rules! new_full {
 		};
 
 		let polkadot_network_service = network_protocol::start(
-			service.network(),
+			network.clone(),
 			network_protocol::Config {
 				collating_for: $collating_for,
 			},
 			(is_known, client.clone()),
 			client.clone(),
-			service.spawn_task_handle(),
+			task_manager.spawn_handle(),
 		).map_err(|e| format!("Could not spawn network worker: {:?}", e))?;
 
 		let authority_handles = if is_collator || role.is_authority() {
@@ -380,14 +377,14 @@ macro_rules! new_full {
 				client: client.clone(),
 				network: polkadot_network_service.clone(),
 				collators: polkadot_network_service.clone(),
-				spawner: service.spawn_task_handle(),
+				spawner: task_manager.spawn_handle(),
 				availability_store: availability_store.clone(),
 				select_chain: select_chain.clone(),
-				keystore: service.keystore(),
+				keystore: keystore.clone(),
 				max_block_data_size,
 			}.build();
 
-			service.spawn_essential_task_handle().spawn("validation-service", Box::pin(validation_service));
+			task_manager.spawn_essential_handle().spawn("validation-service", Box::pin(validation_service));
 
 			handles.validation_service_handle = Some(validation_service_handle.clone());
 
@@ -403,30 +400,29 @@ macro_rules! new_full {
 
 			let proposer = consensus::ProposerFactory::new(
 				client.clone(),
-				service.transaction_pool(),
+				transaction_pool,
 				validation_service_handle,
 				slot_duration,
-				service.prometheus_registry().as_ref(),
+				prometheus_registry.as_ref(),
 			);
 
-			let select_chain = service.select_chain().ok_or(ServiceError::SelectChainRequired)?;
 			let can_author_with =
 				consensus_common::CanAuthorWithNativeVersion::new(client.executor().clone());
 
 			let block_import = availability_store.block_import(
 				block_import,
 				client.clone(),
-				service.spawn_task_handle(),
+				task_manager.spawn_handle(),
-				service.keystore(),
+				keystore.clone(),
 			)?;
 
 			let babe_config = babe::BabeParams {
-				keystore: service.keystore(),
+				keystore: keystore.clone(),
 				client: client.clone(),
 				select_chain,
 				block_import,
 				env: proposer,
-				sync_oracle: service.network(),
+				sync_oracle: network.clone(),
 				inherent_data_providers: inherent_data_providers.clone(),
 				force_authoring,
 				babe_link,
@@ -434,7 +430,7 @@ macro_rules! new_full {
 			};
 
 			let babe = babe::start_babe(babe_config)?;
-			service.spawn_essential_task_handle().spawn_blocking("babe", babe);
+			task_manager.spawn_essential_handle().spawn_blocking("babe", babe);
 		}
 
 		if matches!(role, Role::Authority{..} | Role::Sentry{..}) {
@@ -443,7 +439,7 @@ macro_rules! new_full {
 					Role::Authority { ref sentry_nodes } => (
 						sentry_nodes.clone(),
 						authority_discovery::Role::Authority (
-							service.keystore(),
+							keystore.clone(),
 						),
 					),
 					Role::Sentry {..} => (
@@ -453,29 +449,28 @@ macro_rules! new_full {
 					_ => unreachable!("Due to outer matches! constraint; qed."),
 				};
 
-				let network = service.network();
 				let network_event_stream = network.event_stream("authority-discovery");
 				let dht_event_stream = network_event_stream.filter_map(|e| async move { match e {
 					Event::Dht(e) => Some(e),
 					_ => None,
 				}}).boxed();
 				let authority_discovery = authority_discovery::AuthorityDiscovery::new(
-					service.client(),
+					client.clone(),
-					network,
+					network.clone(),
 					sentries,
 					dht_event_stream,
 					authority_discovery_role,
-					service.prometheus_registry(),
+					prometheus_registry.clone(),
 				);
 
-				service.spawn_task_handle().spawn("authority-discovery", authority_discovery);
+				task_manager.spawn_handle().spawn("authority-discovery", authority_discovery);
 			}
 		}
 
 		// if the node isn't actively participating in consensus then it doesn't
 		// need a keystore, regardless of which protocol we use below.
 		let keystore = if is_authority {
-			Some(service.keystore() as BareCryptoStorePtr)
+			Some(keystore as BareCryptoStorePtr)
 		} else {
 			None
 		};
@@ -521,15 +516,15 @@ macro_rules! new_full {
 			let grandpa_config = grandpa::GrandpaParams {
 				config,
 				link: link_half,
-				network: service.network(),
+				network: network.clone(),
 				inherent_data_providers: inherent_data_providers.clone(),
-				telemetry_on_connect: Some(service.telemetry_on_connect_stream()),
+				telemetry_on_connect: Some(telemetry_on_connect_sinks.on_connect_stream()),
 				voting_rule,
-				prometheus_registry: service.prometheus_registry(),
+				prometheus_registry: prometheus_registry.clone(),
 				shared_voter_state,
 			};
 
-			service.spawn_essential_task_handle().spawn_blocking(
+			task_manager.spawn_essential_handle().spawn_blocking(
 				"grandpa-voter",
 				grandpa::run_grandpa_voter(grandpa_config)?
 			);
@@ -537,12 +532,12 @@ macro_rules! new_full {
 			grandpa::setup_disabled_grandpa(
 				client.clone(),
 				&inherent_data_providers,
-				service.network(),
+				network.clone(),
 			)?;
 		}
 
 		handles.polkadot_network = Some(polkadot_network_service);
-		(service, client, handles)
+		(task_manager, client, handles)
 	}}
 }
 
@@ -632,6 +627,9 @@ macro_rules! new_light {
 				Ok(polkadot_rpc::create_light(light_deps))
 			})?
 			.build_light()
+			.map(|ServiceComponents { task_manager, rpc_handlers, .. }| {
+				(task_manager, rpc_handlers)
+			})
 	}}
 }
 
@@ -661,7 +659,7 @@ pub fn polkadot_new_full(
 	grandpa_pause: Option<(u32, u32)>,
 )
 	-> Result<(
-		impl AbstractService,
+		TaskManager,
 		Arc<impl PolkadotClient<
 			Block,
 			TFullBackend<Block>,
@@ -694,7 +692,7 @@ pub fn kusama_new_full(
 	slot_duration: u64,
 	grandpa_pause: Option<(u32, u32)>,
 ) -> Result<(
-		impl AbstractService,
+		TaskManager,
 		Arc<impl PolkadotClient<
 			Block,
 			TFullBackend<Block>,
@@ -729,7 +727,7 @@ pub fn westend_new_full(
 	grandpa_pause: Option<(u32, u32)>,
 )
 	-> Result<(
-		impl AbstractService,
+		TaskManager,
 		Arc<impl PolkadotClient<
 			Block,
 			TFullBackend<Block>,
@@ -765,40 +763,24 @@ pub struct FullNodeHandles {
 
 /// Create a new Polkadot service for a light client.
 pub fn polkadot_new_light(mut config: Configuration) -> Result<
-	impl AbstractService<
+	(TaskManager, Arc<RpcHandlers>), ServiceError
-		Block = Block,
+>
-		RuntimeApi = polkadot_runtime::RuntimeApi,
-		Backend = TLightBackend<Block>,
-		SelectChain = LongestChain<TLightBackend<Block>, Block>,
-		CallExecutor = TLightCallExecutor<Block, PolkadotExecutor>,
-	>, ServiceError>
 {
 	new_light!(config, polkadot_runtime::RuntimeApi, PolkadotExecutor)
 }
 
 /// Create a new Kusama service for a light client.
 pub fn kusama_new_light(mut config: Configuration) -> Result<
-	impl AbstractService<
+	(TaskManager, Arc<RpcHandlers>), ServiceError
-		Block = Block,
+>
-		RuntimeApi = kusama_runtime::RuntimeApi,
-		Backend = TLightBackend<Block>,
-		SelectChain = LongestChain<TLightBackend<Block>, Block>,
-		CallExecutor = TLightCallExecutor<Block, KusamaExecutor>,
-	>, ServiceError>
 {
 	new_light!(config, kusama_runtime::RuntimeApi, KusamaExecutor)
 }
 
 /// Create a new Westend service for a light client.
 pub fn westend_new_light(mut config: Configuration, ) -> Result<
-	impl AbstractService<
+	(TaskManager, Arc<RpcHandlers>), ServiceError
-		Block = Block,
+>
-		RuntimeApi = westend_runtime::RuntimeApi,
-		Backend = TLightBackend<Block>,
-		SelectChain = LongestChain<TLightBackend<Block>, Block>,
-		CallExecutor = TLightCallExecutor<Block, KusamaExecutor>
-	>,
-	ServiceError>
 {
 	new_light!(config, westend_runtime::RuntimeApi, KusamaExecutor)
 }