Merge pull request #5002 from paritytech/lightcli

Quick'n'dirty CLI for the light client

parity/cli/config.full.toml

@@ -39,7 +39,7 @@ warp = true
 allow_ips = "all"
 snapshot_peers = 0
 max_pending_peers = 64
-serve_light = true
+no_serve_light = false
 
 reserved_only = false
 reserved_peers = "./path_to_file"

parity/cli/mod.rs

@@ -94,6 +94,7 @@ usage! {
 		flag_chain: String = "foundation", or |c: &Config| otry!(c.parity).chain.clone(),
 		flag_keys_path: String = "$BASE/keys", or |c: &Config| otry!(c.parity).keys_path.clone(),
 		flag_identity: String = "", or |c: &Config| otry!(c.parity).identity.clone(),
+		flag_light: bool = false, or |c: &Config| otry!(c.parity).light,
 
 		// -- Account Options
 		flag_unlock: Option<String> = None,
@@ -149,6 +150,8 @@ usage! {
 		flag_reserved_only: bool = false,
 			or |c: &Config| otry!(c.network).reserved_only.clone(),
 		flag_no_ancient_blocks: bool = false, or |_| None,
+		flag_no_serve_light: bool = false,
+			or |c: &Config| otry!(c.network).no_serve_light.clone(),
 
 		// -- API and Console Options
 		// RPC
@@ -379,6 +382,7 @@ struct Operating {
 	db_path: Option<String>,
 	keys_path: Option<String>,
 	identity: Option<String>,
+	light: Option<bool>,
 }
 
 #[derive(Default, Debug, PartialEq, RustcDecodable)]
@@ -414,6 +418,7 @@ struct Network {
 	node_key: Option<String>,
 	reserved_peers: Option<String>,
 	reserved_only: Option<bool>,
+	no_serve_light: Option<bool>,
 }
 
 #[derive(Default, Debug, PartialEq, RustcDecodable)]
@@ -639,6 +644,7 @@ mod tests {
 			flag_db_path: Some("$HOME/.parity/chains".into()),
 			flag_keys_path: "$HOME/.parity/keys".into(),
 			flag_identity: "".into(),
+			flag_light: false,
 
 			// -- Account Options
 			flag_unlock: Some("0xdeadbeefcafe0000000000000000000000000000".into()),
@@ -669,6 +675,7 @@ mod tests {
 			flag_reserved_peers: Some("./path_to_file".into()),
 			flag_reserved_only: false,
 			flag_no_ancient_blocks: false,
+			flag_no_serve_light: false,
 
 			// -- API and Console Options
 			// RPC
@@ -844,6 +851,7 @@ mod tests {
 				db_path: None,
 				keys_path: None,
 				identity: None,
+				light: None,
 			}),
 			account: Some(Account {
 				unlock: Some(vec!["0x1".into(), "0x2".into(), "0x3".into()]),
@@ -873,6 +881,7 @@ mod tests {
 				node_key: None,
 				reserved_peers: Some("./path/to/reserved_peers".into()),
 				reserved_only: Some(true),
+				no_serve_light: None,
 			}),
 			rpc: Some(Rpc {
 				disable: Some(true),

parity/cli/usage.txt

@@ -70,6 +70,11 @@ Operating Options:
   --keys-path PATH               Specify the path for JSON key files to be found
                                  (default: {flag_keys_path}).
   --identity NAME                Specify your node's name. (default: {flag_identity})
+  --light                        Experimental: run in light client mode. Light clients
+                                 synchronize a bare minimum of data and fetch necessary
+                                 data on-demand from the network. Much lower in storage,
+                                 potentially higher in bandwidth. Has no effect with
+                                 subcommands (default: {flag_light}).
 
 Account Options:
   --unlock ACCOUNTS              Unlock ACCOUNTS for the duration of the execution.
@@ -129,6 +134,7 @@ Networking Options:
   --max-pending-peers NUM        Allow up to NUM pending connections. (default: {flag_max_pending_peers})
   --no-ancient-blocks            Disable downloading old blocks after snapshot restoration
                                  or warp sync. (default: {flag_no_ancient_blocks})
+  --no-serve-light               Disable serving of light peers. (default: {flag_no_serve_light})
 
 API and Console Options:
   --no-jsonrpc                   Disable the JSON-RPC API server. (default: {flag_no_jsonrpc})

parity/configuration.rs

@@ -382,6 +382,8 @@ impl Configuration {
 				check_seal: !self.args.flag_no_seal_check,
 				download_old_blocks: !self.args.flag_no_ancient_blocks,
 				verifier_settings: verifier_settings,
+				serve_light: !self.args.flag_no_serve_light,
+				light: self.args.flag_light,
 			};
 			Cmd::Run(run_cmd)
 		};
@@ -1201,6 +1203,8 @@ mod tests {
 			check_seal: true,
 			download_old_blocks: true,
 			verifier_settings: Default::default(),
+			serve_light: true,
+			light: false,
 		};
 		expected.secretstore_conf.enabled = cfg!(feature = "secretstore");
 		assert_eq!(conf.into_command().unwrap().cmd, Cmd::Run(expected));

parity/dapps.rs

@@ -18,12 +18,14 @@ use std::path::PathBuf;
 use std::sync::Arc;
 
 use dir::default_data_path;
-use ethcore::client::Client;
-use ethsync::SyncProvider;
+use ethcore::client::{Client, BlockChainClient, BlockId};
+use ethcore::transaction::{Transaction, Action};
 use hash_fetch::fetch::Client as FetchClient;
+use hash_fetch::urlhint::ContractClient;
 use helpers::replace_home;
 use rpc_apis::SignerService;
 use parity_reactor;
+use util::{Bytes, Address, U256};
 
 #[derive(Debug, PartialEq, Clone)]
 pub struct Configuration {
@@ -43,15 +45,53 @@ impl Default for Configuration {
 	}
 }
 
-pub struct Dependencies {
+/// Registrar implementation of the full client.
+pub struct FullRegistrar {
+	/// Handle to the full client.
 	pub client: Arc<Client>,
-	pub sync: Arc<SyncProvider>,
+}
+
+impl ContractClient for FullRegistrar {
+	fn registrar(&self) -> Result<Address, String> {
+		self.client.additional_params().get("registrar")
+			 .ok_or_else(|| "Registrar not defined.".into())
+			 .and_then(|registrar| {
+				 registrar.parse().map_err(|e| format!("Invalid registrar address: {:?}", e))
+			 })
+	}
+
+	fn call(&self, address: Address, data: Bytes) -> Result<Bytes, String> {
+		let from = Address::default();
+		let transaction = Transaction {
+			nonce: self.client.latest_nonce(&from),
+			action: Action::Call(address),
+			gas: U256::from(50_000_000),
+			gas_price: U256::default(),
+			value: U256::default(),
+			data: data,
+		}.fake_sign(from);
+
+		self.client.call(&transaction, BlockId::Latest, Default::default())
+			.map_err(|e| format!("{:?}", e))
+			.map(|executed| {
+				executed.output
+			})
+	}
+}
+
+// TODO: light client implementation forwarding to OnDemand and waiting for future
+// to resolve.
+pub struct Dependencies {
+	pub sync_status: Arc<::parity_dapps::SyncStatus>,
+	pub contract_client: Arc<ContractClient>,
 	pub remote: parity_reactor::TokioRemote,
 	pub fetch: FetchClient,
 	pub signer: Arc<SignerService>,
 }
 
-pub fn new(configuration: Configuration, deps: Dependencies) -> Result<Option<Middleware>, String> {
+pub fn new(configuration: Configuration, deps: Dependencies)
+	-> Result<Option<Middleware>, String>
+{
 	if !configuration.enabled {
 		return Ok(None);
 	}
@@ -96,13 +136,8 @@ mod server {
 	use super::Dependencies;
 	use std::path::PathBuf;
 	use std::sync::Arc;
-	use util::{Bytes, Address, U256};
 
-	use ethcore::transaction::{Transaction, Action};
-	use ethcore::client::{Client, BlockChainClient, BlockId};
-	use ethcore_rpc::is_major_importing;
 	use hash_fetch::fetch::Client as FetchClient;
-	use hash_fetch::urlhint::ContractClient;
 	use parity_dapps;
 	use parity_reactor;
 
@@ -113,12 +148,8 @@ mod server {
 		dapps_path: PathBuf,
 		extra_dapps: Vec<PathBuf>,
 	) -> Result<Middleware, String> {
-		let sync = deps.sync;
 		let signer = deps.signer.clone();
-		let client = deps.client;
 		let parity_remote = parity_reactor::Remote::new(deps.remote.clone());
-		let registrar = Arc::new(Registrar { client: client.clone() });
-		let sync_status = Arc::new(move || is_major_importing(Some(sync.status().state), client.queue_info()));
 		let web_proxy_tokens = Arc::new(move |token| signer.is_valid_web_proxy_access_token(&token));
 
 		Ok(parity_dapps::Middleware::new(
@@ -126,42 +157,10 @@ mod server {
 			deps.signer.address(),
 			dapps_path,
 			extra_dapps,
-			registrar,
-			sync_status,
+			deps.contract_client,
+			deps.sync_status,
 			web_proxy_tokens,
 			deps.fetch.clone(),
 		))
 	}
-
-	struct Registrar {
-		client: Arc<Client>,
-	}
-
-	impl ContractClient for Registrar {
-		fn registrar(&self) -> Result<Address, String> {
-			self.client.additional_params().get("registrar")
-				 .ok_or_else(|| "Registrar not defined.".into())
-				 .and_then(|registrar| {
-					 registrar.parse().map_err(|e| format!("Invalid registrar address: {:?}", e))
-				 })
-		}
-
-		fn call(&self, address: Address, data: Bytes) -> Result<Bytes, String> {
-			let from = Address::default();
-			let transaction = Transaction {
-				nonce: self.client.latest_nonce(&from),
-				action: Action::Call(address),
-				gas: U256::from(50_000_000),
-				gas_price: U256::default(),
-				value: U256::default(),
-				data: data,
-			}.fake_sign(from);
-
-			self.client.call(&transaction, BlockId::Latest, Default::default())
-				.map_err(|e| format!("{:?}", e))
-				.map(|executed| {
-					executed.output
-				})
-		}
-	}
 }

parity/light_helpers/mod.rs

@@ -0,0 +1,21 @@
+// Copyright 2015-2017 Parity Technologies (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Utilities and helpers for the light client.
+
+mod queue_cull;
+
+pub use self::queue_cull::QueueCull;

parity/light_helpers/queue_cull.rs

@@ -0,0 +1,99 @@
+// Copyright 2015-2017 Parity Technologies (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Service for culling the light client's transaction queue.
+
+use std::sync::Arc;
+use std::time::Duration;
+
+use ethcore::service::ClientIoMessage;
+use ethsync::LightSync;
+use io::{IoContext, IoHandler, TimerToken};
+
+use light::client::Client;
+use light::on_demand::{request, OnDemand};
+use light::TransactionQueue;
+
+use futures::{future, stream, Future, Stream};
+
+use parity_reactor::Remote;
+
+use util::RwLock;
+
+// Attepmt to cull once every 10 minutes.
+const TOKEN: TimerToken = 1;
+const TIMEOUT_MS: u64 = 1000 * 60 * 10;
+
+// But make each attempt last only 9 minutes
+const PURGE_TIMEOUT_MS: u64 = 1000 * 60 * 9;
+
+/// Periodically culls the transaction queue of mined transactions.
+pub struct QueueCull {
+	/// A handle to the client, for getting the latest block header.
+	pub client: Arc<Client>,
+	/// A handle to the sync service.
+	pub sync: Arc<LightSync>,
+	/// The on-demand request service.
+	pub on_demand: Arc<OnDemand>,
+	/// The transaction queue.
+	pub txq: Arc<RwLock<TransactionQueue>>,
+	/// Event loop remote.
+	pub remote: Remote,
+}
+
+impl IoHandler<ClientIoMessage> for QueueCull {
+	fn initialize(&self, io: &IoContext<ClientIoMessage>) {
+		io.register_timer(TOKEN, TIMEOUT_MS).expect("Error registering timer");
+	}
+
+	fn timeout(&self, _io: &IoContext<ClientIoMessage>, timer: TimerToken) {
+		if timer != TOKEN { return }
+
+		let senders = self.txq.read().queued_senders();
+		if senders.is_empty() { return }
+
+		let (sync, on_demand, txq) = (self.sync.clone(), self.on_demand.clone(), self.txq.clone());
+		let best_header = self.client.best_block_header();
+		let start_nonce = self.client.engine().account_start_nonce();
+
+		info!(target: "cull", "Attempting to cull queued transactions from {} senders.", senders.len());
+		self.remote.spawn_with_timeout(move || {
+			let maybe_fetching = sync.with_context(move |ctx| {
+				// fetch the nonce of each sender in the queue.
+				let nonce_futures = senders.iter()
+					.map(|&address| request::Account { header: best_header.clone(), address: address })
+					.map(|request| on_demand.account(ctx, request))
+					.map(move |fut| fut.map(move |x| x.map(|acc| acc.nonce).unwrap_or(start_nonce)))
+					.zip(senders.iter())
+					.map(|(fut, &addr)| fut.map(move |nonce| (addr, nonce)));
+
+				// as they come in, update each sender to the new nonce.
+				stream::futures_unordered(nonce_futures)
+					.fold(txq, |txq, (address, nonce)| {
+						txq.write().cull(address, nonce);
+						future::ok(txq)
+					})
+					.map(|_| ()) // finally, discard the txq handle and log errors.
+					.map_err(|_| debug!(target: "cull", "OnDemand prematurely closed channel."))
+			});
+
+			match maybe_fetching {
+				Some(fut) => fut.boxed(),
+				None => future::ok(()).boxed(),
+			}
+		}, Duration::from_millis(PURGE_TIMEOUT_MS), || {})
+	}
+}

parity/main.rs

@@ -28,6 +28,7 @@ extern crate ctrlc;
 extern crate docopt;
 extern crate env_logger;
 extern crate fdlimit;
+extern crate futures;
 extern crate isatty;
 extern crate jsonrpc_core;
 extern crate num_cpus;
@@ -105,6 +106,7 @@ mod deprecated;
 mod dir;
 mod helpers;
 mod informant;
+mod light_helpers;
 mod migration;
 mod modules;
 mod params;

parity/migration.rs

@@ -30,7 +30,7 @@ use ethcore::migrations::Extract;
 /// Database is assumed to be at default version, when no version file is found.
 const DEFAULT_VERSION: u32 = 5;
 /// Current version of database models.
-const CURRENT_VERSION: u32 = 11;
+const CURRENT_VERSION: u32 = 12;
 /// First version of the consolidated database.
 const CONSOLIDATION_VERSION: u32 = 9;
 /// Defines how many items are migrated to the new version of database at once.
@@ -147,6 +147,7 @@ fn consolidated_database_migrations(compaction_profile: &CompactionProfile) -> R
 	let mut manager = MigrationManager::new(default_migration_settings(compaction_profile));
 	manager.add_migration(migrations::ToV10::new()).map_err(|_| Error::MigrationImpossible)?;
 	manager.add_migration(migrations::TO_V11).map_err(|_| Error::MigrationImpossible)?;
+	manager.add_migration(migrations::TO_V12).map_err(|_| Error::MigrationImpossible)?;
 	Ok(manager)
 }
 

parity/rpc.rs

@@ -81,8 +81,8 @@ impl fmt::Display for IpcConfiguration {
 	}
 }
 
-pub struct Dependencies {
-	pub apis: Arc<rpc_apis::Dependencies>,
+pub struct Dependencies<D: rpc_apis::Dependencies> {
+	pub apis: Arc<D>,
 	pub remote: TokioRemote,
 	pub stats: Arc<RpcStats>,
 }
@@ -112,11 +112,17 @@ impl rpc::IpcMetaExtractor<Metadata> for RpcExtractor {
 	}
 }
 
-fn setup_apis(apis: ApiSet, deps: &Dependencies) -> MetaIoHandler<Metadata, Middleware> {
-	rpc_apis::setup_rpc(deps.stats.clone(), deps.apis.clone(), apis)
+fn setup_apis<D>(apis: ApiSet, deps: &Dependencies<D>) -> MetaIoHandler<Metadata, Middleware<D::Notifier>>
+	where D: rpc_apis::Dependencies
+{
+	rpc_apis::setup_rpc(deps.stats.clone(), &*deps.apis, apis)
 }
 
-pub fn new_http(conf: HttpConfiguration, deps: &Dependencies, middleware: Option<dapps::Middleware>) -> Result<Option<HttpServer>, String> {
+pub fn new_http<D: rpc_apis::Dependencies>(
+	conf: HttpConfiguration,
+	deps: &Dependencies<D>,
+	middleware: Option<dapps::Middleware>
+) -> Result<Option<HttpServer>, String> {
 	if !conf.enabled {
 		return Ok(None);
 	}
@@ -157,7 +163,10 @@ pub fn new_http(conf: HttpConfiguration, deps: &Dependencies, middleware: Option
 	}
 }
 
-pub fn new_ipc(conf: IpcConfiguration, dependencies: &Dependencies) -> Result<Option<IpcServer>, String> {
+pub fn new_ipc<D: rpc_apis::Dependencies>(
+	conf: IpcConfiguration,
+	dependencies: &Dependencies<D>
+) -> Result<Option<IpcServer>, String> {
 	if !conf.enabled {
 		return Ok(None);
 	}

parity/rpc_apis.rs

@@ -27,12 +27,14 @@ use ethcore::client::Client;
 use ethcore::miner::{Miner, ExternalMiner};
 use ethcore::snapshot::SnapshotService;
 use ethcore_rpc::{Metadata, NetworkSettings};
-use ethcore_rpc::informant::{Middleware, RpcStats, ClientNotifier};
-use ethcore_rpc::dispatch::FullDispatcher;
-use ethsync::{ManageNetwork, SyncProvider};
+use ethcore_rpc::informant::{ActivityNotifier, Middleware, RpcStats, ClientNotifier};
+use ethcore_rpc::dispatch::{FullDispatcher, LightDispatcher};
+use ethsync::{ManageNetwork, SyncProvider, LightSync};
 use hash_fetch::fetch::Client as FetchClient;
 use jsonrpc_core::{MetaIoHandler};
+use light::{TransactionQueue as LightTransactionQueue, Cache as LightDataCache};
 use updater::Updater;
+use util::{Mutex, RwLock};
 use ethcore_logger::RotatingLogger;
 
 #[derive(Debug, PartialEq, Clone, Eq, Hash)]
@@ -112,25 +114,6 @@ impl FromStr for ApiSet {
 	}
 }
 
-pub struct Dependencies {
-	pub signer_service: Arc<SignerService>,
-	pub client: Arc<Client>,
-	pub snapshot: Arc<SnapshotService>,
-	pub sync: Arc<SyncProvider>,
-	pub net: Arc<ManageNetwork>,
-	pub secret_store: Option<Arc<AccountProvider>>,
-	pub miner: Arc<Miner>,
-	pub external_miner: Arc<ExternalMiner>,
-	pub logger: Arc<RotatingLogger>,
-	pub settings: Arc<NetworkSettings>,
-	pub net_service: Arc<ManageNetwork>,
-	pub updater: Arc<Updater>,
-	pub geth_compatibility: bool,
-	pub dapps_interface: Option<String>,
-	pub dapps_port: Option<u16>,
-	pub fetch: FetchClient,
-}
-
 fn to_modules(apis: &[Api]) -> BTreeMap<String, String> {
 	let mut modules = BTreeMap::new();
 	for api in apis {
@@ -151,6 +134,274 @@ fn to_modules(apis: &[Api]) -> BTreeMap<String, String> {
 	modules
 }
 
+/// RPC dependencies can be used to initialize RPC endpoints from APIs.
+pub trait Dependencies {
+	type Notifier: ActivityNotifier;
+
+	/// Create the activity notifier.
+	fn activity_notifier(&self) -> Self::Notifier;
+
+	/// Extend the given I/O handler with endpoints for each API.
+	fn extend_with_set(&self, handler: &mut MetaIoHandler<Metadata, Middleware<Self::Notifier>>, apis: &[Api]);
+}
+
+/// RPC dependencies for a full node.
+pub struct FullDependencies {
+	pub signer_service: Arc<SignerService>,
+	pub client: Arc<Client>,
+	pub snapshot: Arc<SnapshotService>,
+	pub sync: Arc<SyncProvider>,
+	pub net: Arc<ManageNetwork>,
+	pub secret_store: Option<Arc<AccountProvider>>,
+	pub miner: Arc<Miner>,
+	pub external_miner: Arc<ExternalMiner>,
+	pub logger: Arc<RotatingLogger>,
+	pub settings: Arc<NetworkSettings>,
+	pub net_service: Arc<ManageNetwork>,
+	pub updater: Arc<Updater>,
+	pub geth_compatibility: bool,
+	pub dapps_interface: Option<String>,
+	pub dapps_port: Option<u16>,
+	pub fetch: FetchClient,
+}
+
+impl Dependencies for FullDependencies {
+	type Notifier = ClientNotifier;
+
+	fn activity_notifier(&self) -> ClientNotifier {
+		ClientNotifier {
+			client: self.client.clone(),
+		}
+	}
+
+	fn extend_with_set(&self, handler: &mut MetaIoHandler<Metadata, Middleware>, apis: &[Api]) {
+		use ethcore_rpc::v1::*;
+
+		macro_rules! add_signing_methods {
+			($namespace:ident, $handler:expr, $deps:expr) => {
+				{
+					let deps = &$deps;
+					let dispatcher = FullDispatcher::new(Arc::downgrade(&deps.client), Arc::downgrade(&deps.miner));
+					if deps.signer_service.is_enabled() {
+						$handler.extend_with($namespace::to_delegate(SigningQueueClient::new(&deps.signer_service, dispatcher, &deps.secret_store)))
+					} else {
+						$handler.extend_with($namespace::to_delegate(SigningUnsafeClient::new(&deps.secret_store, dispatcher)))
+					}
+				}
+			}
+		}
+
+		let dispatcher = FullDispatcher::new(Arc::downgrade(&self.client), Arc::downgrade(&self.miner));
+		for api in apis {
+			match *api {
+				Api::Web3 => {
+					handler.extend_with(Web3Client::new().to_delegate());
+				},
+				Api::Net => {
+					handler.extend_with(NetClient::new(&self.sync).to_delegate());
+				},
+				Api::Eth => {
+					let client = EthClient::new(
+						&self.client,
+						&self.snapshot,
+						&self.sync,
+						&self.secret_store,
+						&self.miner,
+						&self.external_miner,
+						EthClientOptions {
+							pending_nonce_from_queue: self.geth_compatibility,
+							allow_pending_receipt_query: !self.geth_compatibility,
+							send_block_number_in_get_work: !self.geth_compatibility,
+						}
+					);
+					handler.extend_with(client.to_delegate());
+
+					let filter_client = EthFilterClient::new(&self.client, &self.miner);
+					handler.extend_with(filter_client.to_delegate());
+
+					add_signing_methods!(EthSigning, handler, self);
+				},
+				Api::Personal => {
+					handler.extend_with(PersonalClient::new(&self.secret_store, dispatcher.clone(), self.geth_compatibility).to_delegate());
+				},
+				Api::Signer => {
+					handler.extend_with(SignerClient::new(&self.secret_store, dispatcher.clone(), &self.signer_service).to_delegate());
+				},
+				Api::Parity => {
+					let signer = match self.signer_service.is_enabled() {
+						true => Some(self.signer_service.clone()),
+						false => None,
+					};
+					handler.extend_with(ParityClient::new(
+						&self.client,
+						&self.miner,
+						&self.sync,
+						&self.updater,
+						&self.net_service,
+						&self.secret_store,
+						self.logger.clone(),
+						self.settings.clone(),
+						signer,
+						self.dapps_interface.clone(),
+						self.dapps_port,
+					).to_delegate());
+
+					add_signing_methods!(EthSigning, handler, self);
+					add_signing_methods!(ParitySigning, handler, self);
+				},
+				Api::ParityAccounts => {
+					handler.extend_with(ParityAccountsClient::new(&self.secret_store).to_delegate());
+				},
+				Api::ParitySet => {
+					handler.extend_with(ParitySetClient::new(
+						&self.client,
+						&self.miner,
+						&self.updater,
+						&self.net_service,
+						self.fetch.clone(),
+					).to_delegate())
+				},
+				Api::Traces => {
+					handler.extend_with(TracesClient::new(&self.client, &self.miner).to_delegate())
+				},
+				Api::Rpc => {
+					let modules = to_modules(&apis);
+					handler.extend_with(RpcClient::new(modules).to_delegate());
+				}
+			}
+		}
+	}
+}
+
+/// Light client notifier. Doesn't do anything yet, but might in the future.
+pub struct LightClientNotifier;
+
+impl ActivityNotifier for LightClientNotifier {
+	fn active(&self) {}
+}
+
+/// RPC dependencies for a light client.
+pub struct LightDependencies {
+	pub signer_service: Arc<SignerService>,
+	pub client: Arc<::light::client::Client>,
+	pub sync: Arc<LightSync>,
+	pub net: Arc<ManageNetwork>,
+	pub secret_store: Arc<AccountProvider>,
+	pub logger: Arc<RotatingLogger>,
+	pub settings: Arc<NetworkSettings>,
+	pub on_demand: Arc<::light::on_demand::OnDemand>,
+	pub cache: Arc<Mutex<LightDataCache>>,
+	pub transaction_queue: Arc<RwLock<LightTransactionQueue>>,
+	pub dapps_interface: Option<String>,
+	pub dapps_port: Option<u16>,
+	pub fetch: FetchClient,
+	pub geth_compatibility: bool,
+}
+
+impl Dependencies for LightDependencies {
+	type Notifier = LightClientNotifier;
+
+	fn activity_notifier(&self) -> Self::Notifier { LightClientNotifier }
+	fn extend_with_set(&self, handler: &mut MetaIoHandler<Metadata, Middleware<Self::Notifier>>, apis: &[Api]) {
+		use ethcore_rpc::v1::*;
+
+		let dispatcher = LightDispatcher::new(
+			self.sync.clone(),
+			self.client.clone(),
+			self.on_demand.clone(),
+			self.cache.clone(),
+			self.transaction_queue.clone(),
+		);
+
+		macro_rules! add_signing_methods {
+			($namespace:ident, $handler:expr, $deps:expr) => {
+				{
+					let deps = &$deps;
+					let dispatcher = dispatcher.clone();
+					let secret_store = Some(deps.secret_store.clone());
+					if deps.signer_service.is_enabled() {
+						$handler.extend_with($namespace::to_delegate(
+							SigningQueueClient::new(&deps.signer_service, dispatcher, &secret_store)
+						))
+					} else {
+						$handler.extend_with(
+							$namespace::to_delegate(SigningUnsafeClient::new(&secret_store, dispatcher))
+						)
+					}
+				}
+			}
+		}
+
+		for api in apis {
+			match *api {
+				Api::Web3 => {
+					handler.extend_with(Web3Client::new().to_delegate());
+				},
+				Api::Net => {
+					handler.extend_with(light::NetClient::new(self.sync.clone()).to_delegate());
+				},
+				Api::Eth => {
+					let client = light::EthClient::new(
+						self.sync.clone(),
+						self.client.clone(),
+						self.on_demand.clone(),
+						self.transaction_queue.clone(),
+						self.secret_store.clone(),
+						self.cache.clone(),
+					);
+					handler.extend_with(client.to_delegate());
+
+					// TODO: filters.
+					add_signing_methods!(EthSigning, handler, self);
+				},
+				Api::Personal => {
+					let secret_store = Some(self.secret_store.clone());
+					handler.extend_with(PersonalClient::new(&secret_store, dispatcher.clone(), self.geth_compatibility).to_delegate());
+				},
+				Api::Signer => {
+					let secret_store = Some(self.secret_store.clone());
+					handler.extend_with(SignerClient::new(&secret_store, dispatcher.clone(), &self.signer_service).to_delegate());
+				},
+				Api::Parity => {
+					let signer = match self.signer_service.is_enabled() {
+						true => Some(self.signer_service.clone()),
+						false => None,
+					};
+					handler.extend_with(light::ParityClient::new(
+						Arc::new(dispatcher.clone()),
+						self.secret_store.clone(),
+						self.logger.clone(),
+						self.settings.clone(),
+						signer,
+						self.dapps_interface.clone(),
+						self.dapps_port,
+					).to_delegate());
+
+					add_signing_methods!(EthSigning, handler, self);
+					add_signing_methods!(ParitySigning, handler, self);
+				},
+				Api::ParityAccounts => {
+					let secret_store = Some(self.secret_store.clone());
+					handler.extend_with(ParityAccountsClient::new(&secret_store).to_delegate());
+				},
+				Api::ParitySet => {
+					handler.extend_with(light::ParitySetClient::new(
+						self.sync.clone(),
+						self.fetch.clone(),
+					).to_delegate())
+				},
+				Api::Traces => {
+					handler.extend_with(light::TracesClient.to_delegate())
+				},
+				Api::Rpc => {
+					let modules = to_modules(&apis);
+					handler.extend_with(RpcClient::new(modules).to_delegate());
+				}
+			}
+		}
+	}
+}
+
 impl ApiSet {
 	pub fn list_apis(&self) -> HashSet<Api> {
 		let mut safe_list = vec![Api::Web3, Api::Net, Api::Eth, Api::Parity, Api::Traces, Api::Rpc]
@@ -172,110 +423,12 @@ impl ApiSet {
 	}
 }
 
-macro_rules! add_signing_methods {
-	($namespace:ident, $handler:expr, $deps:expr) => {
-		{
-			let handler = &mut $handler;
-			let deps = &$deps;
-			let dispatcher = FullDispatcher::new(Arc::downgrade(&deps.client), Arc::downgrade(&deps.miner));
-			if deps.signer_service.is_enabled() {
-				handler.extend_with($namespace::to_delegate(SigningQueueClient::new(&deps.signer_service, dispatcher, &deps.secret_store)))
-			} else {
-				handler.extend_with($namespace::to_delegate(SigningUnsafeClient::new(&deps.secret_store, dispatcher)))
-			}
-		}
-	}
-}
-
-pub fn setup_rpc(stats: Arc<RpcStats>, deps: Arc<Dependencies>, apis: ApiSet) -> MetaIoHandler<Metadata, Middleware> {
-	use ethcore_rpc::v1::*;
-
-	let mut handler = MetaIoHandler::with_middleware(Middleware::new(stats, ClientNotifier {
-		client: deps.client.clone(),
-	}));
-
+pub fn setup_rpc<D: Dependencies>(stats: Arc<RpcStats>, deps: &D, apis: ApiSet) -> MetaIoHandler<Metadata, Middleware<D::Notifier>> {
+	let mut handler = MetaIoHandler::with_middleware(Middleware::new(stats, deps.activity_notifier()));
 	// it's turned into vector, cause ont of the cases requires &[]
 	let apis = apis.list_apis().into_iter().collect::<Vec<_>>();
-	let dispatcher = FullDispatcher::new(Arc::downgrade(&deps.client), Arc::downgrade(&deps.miner));
+	deps.extend_with_set(&mut handler, &apis[..]);
 
-	for api in &apis {
-		match *api {
-			Api::Web3 => {
-				handler.extend_with(Web3Client::new().to_delegate());
-			},
-			Api::Net => {
-				handler.extend_with(NetClient::new(&deps.sync).to_delegate());
-			},
-			Api::Eth => {
-				let client = EthClient::new(
-					&deps.client,
-					&deps.snapshot,
-					&deps.sync,
-					&deps.secret_store,
-					&deps.miner,
-					&deps.external_miner,
-					EthClientOptions {
-						pending_nonce_from_queue: deps.geth_compatibility,
-						allow_pending_receipt_query: !deps.geth_compatibility,
-						send_block_number_in_get_work: !deps.geth_compatibility,
-					}
-				);
-				handler.extend_with(client.to_delegate());
-
-				let filter_client = EthFilterClient::new(&deps.client, &deps.miner);
-				handler.extend_with(filter_client.to_delegate());
-
-				add_signing_methods!(EthSigning, handler, deps);
-			},
-			Api::Personal => {
-				handler.extend_with(PersonalClient::new(&deps.secret_store, dispatcher.clone(), deps.geth_compatibility).to_delegate());
-			},
-			Api::Signer => {
-				handler.extend_with(SignerClient::new(&deps.secret_store, dispatcher.clone(), &deps.signer_service).to_delegate());
-			},
-			Api::Parity => {
-				let signer = match deps.signer_service.is_enabled() {
-					true => Some(deps.signer_service.clone()),
-					false => None,
-				};
-				handler.extend_with(ParityClient::new(
-					&deps.client,
-					&deps.miner,
-					&deps.sync,
-					&deps.updater,
-					&deps.net_service,
-					&deps.secret_store,
-					deps.logger.clone(),
-					deps.settings.clone(),
-					signer,
-					deps.dapps_interface.clone(),
-					deps.dapps_port,
-				).to_delegate());
-
-				add_signing_methods!(EthSigning, handler, deps);
-				add_signing_methods!(ParitySigning, handler, deps);
-			},
-			Api::ParityAccounts => {
-				handler.extend_with(ParityAccountsClient::new(&deps.secret_store).to_delegate());
-			},
-			Api::ParitySet => {
-				handler.extend_with(ParitySetClient::new(
-					&deps.client,
-					&deps.miner,
-					&deps.updater,
-					&deps.net_service,
-					deps.fetch.clone(),
-				).to_delegate())
-			},
-			Api::Traces => {
-				handler.extend_with(TracesClient::new(&deps.client, &deps.miner).to_delegate())
-			},
-			Api::Rpc => {
-				let modules = to_modules(&apis);
-				handler.extend_with(RpcClient::new(modules).to_delegate());
-			}
-		}
-	}
 	handler
 }
 

parity/run.rs

@@ -30,6 +30,7 @@ use ethcore::account_provider::{AccountProvider, AccountProviderSettings};
 use ethcore::miner::{Miner, MinerService, ExternalMiner, MinerOptions};
 use ethcore::snapshot;
 use ethcore::verification::queue::VerifierSettings;
+use light::Cache as LightDataCache;
 use ethsync::SyncConfig;
 use informant::Informant;
 use updater::{UpdatePolicy, Updater};
@@ -60,6 +61,10 @@ const SNAPSHOT_PERIOD: u64 = 10000;
 // how many blocks to wait before starting a periodic snapshot.
 const SNAPSHOT_HISTORY: u64 = 100;
 
+// Number of minutes before a given gas price corpus should expire.
+// Light client only.
+const GAS_CORPUS_EXPIRATION_MINUTES: i64 = 60 * 6;
+
 // Pops along with error messages when a password is missing or invalid.
 const VERIFY_PASSWORD_HINT: &'static str = "Make sure valid password is present in files passed using `--password` or in the configuration file.";
 
@@ -107,6 +112,8 @@ pub struct RunCmd {
 	pub check_seal: bool,
 	pub download_old_blocks: bool,
 	pub verifier_settings: VerifierSettings,
+	pub serve_light: bool,
+	pub light: bool,
 }
 
 pub fn open_ui(signer_conf: &signer::Configuration) -> Result<(), String> {
@@ -148,6 +155,171 @@ impl ::local_store::NodeInfo for FullNodeInfo {
 	}
 }
 
+// helper for light execution.
+fn execute_light(cmd: RunCmd, can_restart: bool, logger: Arc<RotatingLogger>) -> Result<(bool, Option<String>), String> {
+	use light::client as light_client;
+	use ethsync::{LightSyncParams, LightSync, ManageNetwork};
+	use util::RwLock;
+
+	let panic_handler = PanicHandler::new_in_arc();
+
+	// load spec
+	let spec = cmd.spec.spec()?;
+
+	// load genesis hash
+	let genesis_hash = spec.genesis_header().hash();
+
+	// database paths
+	let db_dirs = cmd.dirs.database(genesis_hash, cmd.spec.legacy_fork_name(), spec.data_dir.clone());
+
+	// user defaults path
+	let user_defaults_path = db_dirs.user_defaults_path();
+
+	// load user defaults
+	let user_defaults = UserDefaults::load(&user_defaults_path)?;
+
+	// select pruning algorithm
+	let algorithm = cmd.pruning.to_algorithm(&user_defaults);
+
+	let compaction = cmd.compaction.compaction_profile(db_dirs.db_root_path().as_path());
+
+	// execute upgrades
+	execute_upgrades(&cmd.dirs.base, &db_dirs, algorithm, compaction.clone())?;
+
+	// create dirs used by parity
+	cmd.dirs.create_dirs(cmd.dapps_conf.enabled, cmd.signer_conf.enabled, cmd.secretstore_conf.enabled)?;
+
+	info!("Starting {}", Colour::White.bold().paint(version()));
+	info!("Running in experimental {} mode.", Colour::Blue.bold().paint("Light Client"));
+
+	// start client and create transaction queue.
+	let mut config = light_client::Config {
+		queue: Default::default(),
+		chain_column: ::ethcore::db::COL_LIGHT_CHAIN,
+		db_cache_size: Some(cmd.cache_config.blockchain() as usize * 1024 * 1024),
+		db_compaction: compaction,
+		db_wal: cmd.wal,
+	};
+
+	config.queue.max_mem_use = cmd.cache_config.queue() as usize * 1024 * 1024;
+	config.queue.verifier_settings = cmd.verifier_settings;
+
+	let service = light_client::Service::start(config, &spec, &db_dirs.client_path(algorithm))
+		.map_err(|e| format!("Error starting light client: {}", e))?;
+	let txq = Arc::new(RwLock::new(::light::transaction_queue::TransactionQueue::default()));
+	let provider = ::light::provider::LightProvider::new(service.client().clone(), txq.clone());
+
+	// start network.
+	// set up bootnodes
+	let mut net_conf = cmd.net_conf;
+	if !cmd.custom_bootnodes {
+		net_conf.boot_nodes = spec.nodes.clone();
+	}
+
+	// TODO: configurable cache size.
+	let cache = LightDataCache::new(Default::default(), ::time::Duration::minutes(GAS_CORPUS_EXPIRATION_MINUTES));
+	let cache = Arc::new(::util::Mutex::new(cache));
+
+	// start on_demand service.
+	let on_demand = Arc::new(::light::on_demand::OnDemand::new(cache.clone()));
+
+	// set network path.
+	net_conf.net_config_path = Some(db_dirs.network_path().to_string_lossy().into_owned());
+	let sync_params = LightSyncParams {
+		network_config: net_conf.into_basic().map_err(|e| format!("Failed to produce network config: {}", e))?,
+		client: Arc::new(provider),
+		network_id: cmd.network_id.unwrap_or(spec.network_id()),
+		subprotocol_name: ::ethsync::LIGHT_PROTOCOL,
+		handlers: vec![on_demand.clone()],
+	};
+	let light_sync = LightSync::new(sync_params).map_err(|e| format!("Error starting network: {}", e))?;
+	let light_sync = Arc::new(light_sync);
+
+	// spin up event loop
+	let event_loop = EventLoop::spawn();
+
+	// queue cull service.
+	let queue_cull = Arc::new(::light_helpers::QueueCull {
+		client: service.client().clone(),
+		sync: light_sync.clone(),
+		on_demand: on_demand.clone(),
+		txq: txq.clone(),
+		remote: event_loop.remote(),
+	});
+
+	service.register_handler(queue_cull).map_err(|e| format!("Error attaching service: {:?}", e))?;
+
+	// start the network.
+	light_sync.start_network();
+
+	// fetch service
+	let fetch = FetchClient::new().map_err(|e| format!("Error starting fetch client: {:?}", e))?;
+	let passwords = passwords_from_files(&cmd.acc_conf.password_files)?;
+
+	// prepare account provider
+	let account_provider = Arc::new(prepare_account_provider(&cmd.spec, &cmd.dirs, &spec.data_dir, cmd.acc_conf, &passwords)?);
+	let rpc_stats = Arc::new(informant::RpcStats::default());
+	let signer_path = cmd.signer_conf.signer_path.clone();
+
+	// start RPCs
+	let deps_for_rpc_apis = Arc::new(rpc_apis::LightDependencies {
+		signer_service: Arc::new(rpc_apis::SignerService::new(move || {
+			signer::generate_new_token(signer_path.clone()).map_err(|e| format!("{:?}", e))
+		}, cmd.ui_address)),
+		client: service.client().clone(),
+		sync: light_sync.clone(),
+		net: light_sync.clone(),
+		secret_store: account_provider,
+		logger: logger,
+		settings: Arc::new(cmd.net_settings),
+		on_demand: on_demand,
+		cache: cache,
+		transaction_queue: txq,
+		dapps_interface: match cmd.dapps_conf.enabled {
+			true => Some(cmd.http_conf.interface.clone()),
+			false => None,
+		},
+		dapps_port: match cmd.dapps_conf.enabled {
+			true => Some(cmd.http_conf.port),
+			false => None,
+		},
+		fetch: fetch,
+		geth_compatibility: cmd.geth_compatibility,
+	});
+
+	let dependencies = rpc::Dependencies {
+		apis: deps_for_rpc_apis.clone(),
+		remote: event_loop.raw_remote(),
+		stats: rpc_stats.clone(),
+	};
+
+	// start rpc servers
+	let _http_server = rpc::new_http(cmd.http_conf, &dependencies, None)?;
+	let _ipc_server = rpc::new_ipc(cmd.ipc_conf, &dependencies)?;
+
+	// the signer server
+	let signer_deps = signer::Dependencies {
+		apis: deps_for_rpc_apis.clone(),
+		remote: event_loop.raw_remote(),
+		rpc_stats: rpc_stats.clone(),
+	};
+	let signing_queue = deps_for_rpc_apis.signer_service.queue();
+	let _signer_server = signer::start(cmd.signer_conf.clone(), signing_queue, signer_deps)?;
+
+	// TODO: Dapps
+
+	// minimal informant thread. Just prints block number every 5 seconds.
+	// TODO: integrate with informant.rs
+	let informant_client = service.client().clone();
+	::std::thread::spawn(move || loop {
+		info!("#{}", informant_client.best_block_header().number());
+		::std::thread::sleep(::std::time::Duration::from_secs(5));
+	});
+
+	// wait for ctrl-c.
+	Ok(wait_for_exit(panic_handler, None, None, can_restart))
+}
+
 pub fn execute(cmd: RunCmd, can_restart: bool, logger: Arc<RotatingLogger>) -> Result<(bool, Option<String>), String> {
 	if cmd.ui && cmd.dapps_conf.enabled {
 		// Check if Parity is already running
@@ -157,12 +329,17 @@ pub fn execute(cmd: RunCmd, can_restart: bool, logger: Arc<RotatingLogger>) -> R
 		}
 	}
 
-	// set up panic handler
-	let panic_handler = PanicHandler::new_in_arc();
-
 	// increase max number of open files
 	raise_fd_limit();
 
+	// run as light client.
+	if cmd.light {
+		return execute_light(cmd, can_restart, logger);
+	}
+
+	// set up panic handler
+	let panic_handler = PanicHandler::new_in_arc();
+
 	// load spec
 	let spec = cmd.spec.spec()?;
 
@@ -244,6 +421,7 @@ pub fn execute(cmd: RunCmd, can_restart: bool, logger: Arc<RotatingLogger>) -> R
 	sync_config.fork_block = spec.fork_block();
 	sync_config.warp_sync = cmd.warp_sync;
 	sync_config.download_old_blocks = cmd.download_old_blocks;
+	sync_config.serve_light = cmd.serve_light;
 
 	let passwords = passwords_from_files(&cmd.acc_conf.password_files)?;
 
@@ -407,7 +585,8 @@ pub fn execute(cmd: RunCmd, can_restart: bool, logger: Arc<RotatingLogger>) -> R
 		true => None,
 		false => Some(account_provider.clone())
 	};
-	let deps_for_rpc_apis = Arc::new(rpc_apis::Dependencies {
+
+	let deps_for_rpc_apis = Arc::new(rpc_apis::FullDependencies {
 		signer_service: Arc::new(rpc_apis::SignerService::new(move || {
 			signer::generate_new_token(signer_path.clone()).map_err(|e| format!("{:?}", e))
 		}, cmd.ui_address)),
@@ -440,13 +619,18 @@ pub fn execute(cmd: RunCmd, can_restart: bool, logger: Arc<RotatingLogger>) -> R
 		stats: rpc_stats.clone(),
 	};
 
-	// the dapps middleware
-	let dapps_deps = dapps::Dependencies {
-		client: client.clone(),
-		sync: sync_provider.clone(),
-		remote: event_loop.raw_remote(),
-		fetch: fetch.clone(),
-		signer: deps_for_rpc_apis.signer_service.clone(),
+	// the dapps server
+	let dapps_deps = {
+		let (sync, client) = (sync_provider.clone(), client.clone());
+		let contract_client = Arc::new(::dapps::FullRegistrar { client: client.clone() });
+
+		dapps::Dependencies {
+			sync_status: Arc::new(move || is_major_importing(Some(sync.status().state), client.queue_info())),
+			contract_client: contract_client,
+			remote: event_loop.raw_remote(),
+			fetch: fetch.clone(),
+			signer: deps_for_rpc_apis.signer_service.clone(),
+		}
 	};
 	let dapps_middleware = dapps::new(cmd.dapps_conf.clone(), dapps_deps)?;
 
@@ -460,7 +644,8 @@ pub fn execute(cmd: RunCmd, can_restart: bool, logger: Arc<RotatingLogger>) -> R
 		remote: event_loop.raw_remote(),
 		rpc_stats: rpc_stats.clone(),
 	};
-	let signer_server = signer::start(cmd.signer_conf.clone(), signer_deps)?;
+	let signing_queue = deps_for_rpc_apis.signer_service.queue();
+	let signer_server = signer::start(cmd.signer_conf.clone(), signing_queue, signer_deps)?;
 
 	// secret store key server
 	let secretstore_deps = secretstore::Dependencies {

parity/signer.rs

@@ -23,7 +23,7 @@ pub use ethcore_signer::Server as SignerServer;
 use ansi_term::Colour;
 use dir::default_data_path;
 use ethcore_rpc::informant::RpcStats;
-use ethcore_rpc;
+use ethcore_rpc::{self, ConfirmationsQueue};
 use ethcore_signer as signer;
 use helpers::replace_home;
 use parity_reactor::TokioRemote;
@@ -55,8 +55,8 @@ impl Default for Configuration {
 	}
 }
 
-pub struct Dependencies {
-	pub apis: Arc<rpc_apis::Dependencies>,
+pub struct Dependencies<D: rpc_apis::Dependencies> {
+	pub apis: Arc<D>,
 	pub remote: TokioRemote,
 	pub rpc_stats: Arc<RpcStats>,
 }
@@ -77,11 +77,15 @@ impl signer::MetaExtractor<ethcore_rpc::Metadata> for StandardExtractor {
 	}
 }
 
-pub fn start(conf: Configuration, deps: Dependencies) -> Result<Option<SignerServer>, String> {
+pub fn start<D: rpc_apis::Dependencies>(
+	conf: Configuration,
+	queue: Arc<ConfirmationsQueue>,
+	deps: Dependencies<D>,
+) -> Result<Option<SignerServer>, String> {
 	if !conf.enabled {
 		Ok(None)
 	} else {
-		Ok(Some(do_start(conf, deps)?))
+		Ok(Some(do_start(conf, queue, deps)?))
 	}
 }
 
@@ -125,14 +129,18 @@ pub fn generate_new_token(path: String) -> io::Result<String> {
 	Ok(code)
 }
 
-fn do_start(conf: Configuration, deps: Dependencies) -> Result<SignerServer, String> {
+fn do_start<D: rpc_apis::Dependencies>(
+	conf: Configuration,
+	queue: Arc<ConfirmationsQueue>,
+	deps: Dependencies<D>
+) -> Result<SignerServer, String> {
 	let addr = format!("{}:{}", conf.interface, conf.port)
 		.parse()
 		.map_err(|_| format!("Invalid port specified: {}", conf.port))?;
 
 	let start_result = {
 		let server = signer::ServerBuilder::new(
-			deps.apis.signer_service.queue(),
+			queue,
 			codes_path(conf.signer_path),
 		);
 		if conf.skip_origin_validation {
@@ -141,7 +149,7 @@ fn do_start(conf: Configuration, deps: Dependencies) -> Result<SignerServer, Str
 		}
 		let server = server.skip_origin_validation(conf.skip_origin_validation);
 		let server = server.stats(deps.rpc_stats.clone());
-		let handler = rpc_apis::setup_rpc(deps.rpc_stats, deps.apis, rpc_apis::ApiSet::SafeContext);
+		let handler = rpc_apis::setup_rpc(deps.rpc_stats, &*deps.apis, rpc_apis::ApiSet::SafeContext);
 		let remote = deps.remote.clone();
 		server.start_with_extractor(addr, handler, remote, StandardExtractor)
 	};