archive: Remove unsued backend and task executor

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

substrate/client/rpc-spec-v2/src/archive/archive.rs

@@ -19,7 +19,7 @@
 //! API implementation for `archive`.
 
 use super::ArchiveApiServer;
-use crate::{chain_head::hex_string, SubscriptionTaskExecutor};
+use crate::chain_head::hex_string;
 use codec::Encode;
 use jsonrpsee::core::{async_trait, RpcResult};
 use sc_client_api::{Backend, BlockBackend, BlockchainEvents, ExecutorProvider, StorageProvider};
@@ -32,32 +32,17 @@ use std::{marker::PhantomData, sync::Arc};
 pub struct Archive<BE: Backend<Block>, Block: BlockT, Client> {
 	/// Substrate client.
 	client: Arc<Client>,
-	/// Backend of the chain.
-	_backend: Arc<BE>,
-	/// Executor to spawn subscriptions.
-	_executor: SubscriptionTaskExecutor,
 	/// The hexadecimal encoded hash of the genesis block.
 	genesis_hash: String,
 	/// Phantom member to pin the block type.
-	_phantom: PhantomData<Block>,
+	_phantom: PhantomData<(Block, BE)>,
 }
 
 impl<BE: Backend<Block>, Block: BlockT, Client> Archive<BE, Block, Client> {
 	/// Create a new [`Archive`].
-	pub fn new<GenesisHash: AsRef<[u8]>>(
-		client: Arc<Client>,
-		backend: Arc<BE>,
-		executor: SubscriptionTaskExecutor,
-		genesis_hash: GenesisHash,
-	) -> Self {
+	pub fn new<GenesisHash: AsRef<[u8]>>(client: Arc<Client>, genesis_hash: GenesisHash) -> Self {
 		let genesis_hash = hex_string(&genesis_hash.as_ref());
-		Self {
-			client,
-			_backend: backend.clone(),
-			_executor: executor,
-			genesis_hash,
-			_phantom: PhantomData,
-		}
+		Self { client, genesis_hash, _phantom: PhantomData }
 	}
 }
 

substrate/client/rpc-spec-v2/src/archive/tests.rs

@@ -25,7 +25,6 @@ use jsonrpsee::{types::EmptyServerParams as EmptyParams, RpcModule};
 use sc_block_builder::BlockBuilderProvider;
 
 use sp_consensus::BlockOrigin;
-use sp_core::testing::TaskExecutor;
 use std::sync::Arc;
 use substrate_test_runtime_client::{
 	prelude::*, runtime, Backend, BlockBuilderExt, Client, ClientBlockImportExt,
@@ -39,12 +38,9 @@ type Block = substrate_test_runtime_client::runtime::Block;
 
 fn setup_api() -> (Arc<Client<Backend>>, RpcModule<Archive<Backend, Block, Client<Backend>>>) {
 	let builder = TestClientBuilder::new();
-	let backend = builder.backend();
 	let client = Arc::new(builder.build());
 
-	let api =
-		Archive::new(client.clone(), backend, Arc::new(TaskExecutor::default()), CHAIN_GENESIS)
-			.into_rpc();
+	let api = Archive::new(client.clone(), CHAIN_GENESIS).into_rpc();
 
 	(client, api)
 }