Add missing RPC APIs to rialto parachain node (paritytech#1250)

* add missing RPC APIs to rialto parachain node

* spellcheck

bridges/bin/rialto-parachain/node/src/service.rs

@@ -14,6 +14,13 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity Bridges Common.  If not, see <http://www.gnu.org/licenses/>.
 
+//! Rialto parachain node service.
+//!
+//! The code is mostly copy of `polkadot-parachains/src/service.rs` file from Cumulus
+//! repository with some parts removed. We have added two RPC extensions to the original
+//! service: `pallet_transaction_payment_rpc::TransactionPaymentApi` and
+//! `substrate_frame_rpc_system::SystemApi`.
+
 // std
 use std::sync::Arc;
 
@@ -212,7 +219,14 @@ where
 	sc_client_api::StateBackendFor<TFullBackend<Block>, Block>: sp_api::StateBackend<BlakeTwo256>,
 	Executor: NativeExecutionDispatch + 'static,
 	RB: Fn(
+			sc_rpc_api::DenyUnsafe,
 			Arc<TFullClient<Block, RuntimeApi, NativeElseWasmExecutor<Executor>>>,
+			Arc<
+				sc_transaction_pool::FullPool<
+					Block,
+					TFullClient<Block, RuntimeApi, NativeElseWasmExecutor<Executor>>,
+				>,
+			>,
 		) -> jsonrpc_core::IoHandler<sc_rpc::Metadata>
 		+ Send
 		+ 'static,
@@ -288,7 +302,10 @@ where
 		})?;
 
 	let rpc_client = client.clone();
-	let rpc_extensions_builder = Box::new(move |_, _| Ok(rpc_ext_builder(rpc_client.clone())));
+	let rpc_transaction_pool = transaction_pool.clone();
+	let rpc_extensions_builder = Box::new(move |deny_unsafe, _| {
+		Ok(rpc_ext_builder(deny_unsafe, rpc_client.clone(), rpc_transaction_pool.clone()))
+	});
 
 	sc_service::spawn_tasks(sc_service::SpawnTasksParams {
 		rpc_extensions_builder,
@@ -412,7 +429,19 @@ pub async fn start_node(
 		parachain_config,
 		polkadot_config,
 		id,
-		|_| Default::default(),
+		|deny_unsafe, client, pool| {
+			use pallet_transaction_payment_rpc::{TransactionPayment, TransactionPaymentApi};
+			use substrate_frame_rpc_system::{FullSystem, SystemApi};
+
+			let mut io = jsonrpc_core::IoHandler::default();
+			io.extend_with(SystemApi::to_delegate(FullSystem::new(
+				client.clone(),
+				pool,
+				deny_unsafe,
+			)));
+			io.extend_with(TransactionPaymentApi::to_delegate(TransactionPayment::new(client)));
+			io
+		},
 		parachain_build_import_queue,
 		|client,
 		 prometheus_registry,