Set reserved nodes with offchain worker. (#6996)

* add offchain worker api to set reserved nodes.

* new offchain api to get node public key.

* node public key from converter

* refactor set reserved nodes ocw api.

* new ndoe authorization pallet

* remove unnecessary clone and more.

* more

* tests for node authorization pallet

* remove dependency

* fix build

* more tests.

* refactor

* Update primitives/core/src/offchain/testing.rs

Co-authored-by: Tomasz Drwięga <tomusdrw@users.noreply.github.com>

* Update frame/node-authorization/src/lib.rs

Co-authored-by: Tomasz Drwięga <tomusdrw@users.noreply.github.com>

* Update frame/node-authorization/src/lib.rs

Co-authored-by: Tomasz Drwięga <tomusdrw@users.noreply.github.com>

* Update frame/node-authorization/src/lib.rs

Co-authored-by: Tomasz Drwięga <tomusdrw@users.noreply.github.com>

* format code

* expose NetworkService

* remove NetworkStateInfo in offchain

* replace NodePublicKey with PeerId.

* set max length of peer id.

* clear more

* use BTreeSet for set of peers.

* decode opaque peer id.

* extract NetworkProvider for client offchain.

* use OpaquePeerId in node authorization pallet.

* fix test

* better documentation

* fix test

* doc

* more fix

* Update primitives/core/src/offchain/mod.rs

Co-authored-by: Pierre Krieger <pierre.krieger1708@gmail.com>

* Update client/offchain/src/api.rs

Co-authored-by: Pierre Krieger <pierre.krieger1708@gmail.com>

* derive serialize and deserialize

Co-authored-by: Tomasz Drwięga <tomusdrw@users.noreply.github.com>
Co-authored-by: Pierre Krieger <pierre.krieger1708@gmail.com>

substrate/client/network/src/service.rs

@@ -20,7 +20,7 @@
 //!
 //! There are two main structs in this module: [`NetworkWorker`] and [`NetworkService`].
 //! The [`NetworkWorker`] *is* the network and implements the `Future` trait. It must be polled in
-//! order fo the network to advance.
+//! order for the network to advance.
 //! The [`NetworkService`] is merely a shared version of the [`NetworkWorker`]. You can obtain an
 //! `Arc<NetworkService>` by calling [`NetworkWorker::service`].
 //!
@@ -605,6 +605,22 @@ impl<B: BlockT + 'static, H: ExHashT> NetworkService<B, H> {
 		&self.local_peer_id
 	}
 
+	/// Set authorized peers.
+	///
+	/// Need a better solution to manage authorized peers, but now just use reserved peers for
+	/// prototyping.
+	pub fn set_authorized_peers(&self, peers: HashSet<PeerId>) {
+		self.peerset.set_reserved_peers(peers)
+	}
+
+	/// Set authorized_only flag.
+	///
+	/// Need a better solution to decide authorized_only, but now just use reserved_only flag for
+	/// prototyping.
+	pub fn set_authorized_only(&self, reserved_only: bool) {
+		self.peerset.set_reserved_only(reserved_only)
+	}
+
 	/// Appends a notification to the buffer of pending outgoing notifications with the given peer.
 	/// Has no effect if the notifications channel with this protocol name is not open.
 	///

substrate/client/offchain/src/api.rs

@@ -19,16 +19,18 @@ use std::{
 	sync::Arc,
 	convert::TryFrom,
 	thread::sleep,
+	collections::HashSet,
 };
 
-use sp_core::offchain::OffchainStorage;
+use crate::NetworkProvider;
 use futures::Future;
 use log::error;
-use sc_network::{PeerId, Multiaddr, NetworkStateInfo};
+use sc_network::{PeerId, Multiaddr};
 use codec::{Encode, Decode};
+use sp_core::OpaquePeerId;
 use sp_core::offchain::{
 	Externalities as OffchainExt, HttpRequestId, Timestamp, HttpRequestStatus, HttpError,
-	OpaqueNetworkState, OpaquePeerId, OpaqueMultiaddr, StorageKind,
+	OffchainStorage, OpaqueNetworkState, OpaqueMultiaddr, StorageKind,
 };
 pub use sp_offchain::STORAGE_PREFIX;
 pub use http::SharedClient;
@@ -49,8 +51,8 @@ mod timestamp;
 pub(crate) struct Api<Storage> {
 	/// Offchain Workers database.
 	db: Storage,
-	/// A NetworkState provider.
-	network_state: Arc<dyn NetworkStateInfo + Send + Sync>,
+	/// A provider for substrate networking.
+	network_provider: Arc<dyn NetworkProvider + Send + Sync>,
 	/// Is this node a potential validator?
 	is_validator: bool,
 	/// Everything HTTP-related is handled by a different struct.
@@ -73,10 +75,10 @@ impl<Storage: OffchainStorage> OffchainExt for Api<Storage> {
 	}
 
 	fn network_state(&self) -> Result<OpaqueNetworkState, ()> {
-		let external_addresses = self.network_state.external_addresses();
+		let external_addresses = self.network_provider.external_addresses();
 
 		let state = NetworkState::new(
-			self.network_state.local_peer_id(),
+			self.network_provider.local_peer_id(),
 			external_addresses,
 		);
 		Ok(OpaqueNetworkState::from(state))
@@ -180,6 +182,15 @@ impl<Storage: OffchainStorage> OffchainExt for Api<Storage> {
 	) -> Result<usize, HttpError> {
 		self.http.response_read_body(request_id, buffer, deadline)
 	}
+
+	fn set_authorized_nodes(&mut self, nodes: Vec<OpaquePeerId>, authorized_only: bool) {
+		let peer_ids: HashSet<PeerId> = nodes.into_iter()
+			.filter_map(|node| PeerId::from_bytes(node.0).ok())
+			.collect();
+		
+		self.network_provider.set_authorized_peers(peer_ids);
+		self.network_provider.set_authorized_only(authorized_only);
+	}
 }
 
 /// Information about the local node's network state.
@@ -256,10 +267,10 @@ pub(crate) struct AsyncApi {
 }
 
 impl AsyncApi {
-	/// Creates new Offchain extensions API implementation  an the asynchronous processing part.
+	/// Creates new Offchain extensions API implementation an the asynchronous processing part.
 	pub fn new<S: OffchainStorage>(
 		db: S,
-		network_state: Arc<dyn NetworkStateInfo + Send + Sync>,
+		network_provider: Arc<dyn NetworkProvider + Send + Sync>,
 		is_validator: bool,
 		shared_client: SharedClient,
 	) -> (Api<S>, Self) {
@@ -267,7 +278,7 @@ impl AsyncApi {
 
 		let api = Api {
 			db,
-			network_state,
+			network_provider,
 			is_validator,
 			http: http_api,
 		};
@@ -292,11 +303,21 @@ mod tests {
 	use super::*;
 	use std::{convert::{TryFrom, TryInto}, time::SystemTime};
 	use sc_client_db::offchain::LocalStorage;
-	use sc_network::PeerId;
+	use sc_network::{NetworkStateInfo, PeerId};
 
-	struct MockNetworkStateInfo();
+	struct TestNetwork();
 
-	impl NetworkStateInfo for MockNetworkStateInfo {
+	impl NetworkProvider for TestNetwork {
+		fn set_authorized_peers(&self, _peers: HashSet<PeerId>) {
+			unimplemented!()
+		}
+
+		fn set_authorized_only(&self, _reserved_only: bool) {
+			unimplemented!()
+		}
+	}
+
+	impl NetworkStateInfo for TestNetwork {
 		fn external_addresses(&self) -> Vec<Multiaddr> {
 			Vec::new()
 		}
@@ -309,10 +330,9 @@ mod tests {
 	fn offchain_api() -> (Api<LocalStorage>, AsyncApi) {
 		let _ = env_logger::try_init();
 		let db = LocalStorage::new_test();
-		let mock = Arc::new(MockNetworkStateInfo());
+		let mock = Arc::new(TestNetwork());
 		let shared_client = SharedClient::new();
 
-
 		AsyncApi::new(
 			db,
 			mock,

substrate/client/offchain/src/lib.rs

@@ -33,14 +33,17 @@
 
 #![warn(missing_docs)]
 
-use std::{fmt, marker::PhantomData, sync::Arc};
+use std::{
+	fmt, marker::PhantomData, sync::Arc,
+	collections::HashSet,
+};
 
 use parking_lot::Mutex;
 use threadpool::ThreadPool;
 use sp_api::{ApiExt, ProvideRuntimeApi};
 use futures::future::Future;
 use log::{debug, warn};
-use sc_network::NetworkStateInfo;
+use sc_network::{ExHashT, NetworkService, NetworkStateInfo, PeerId};
 use sp_core::{offchain::{self, OffchainStorage}, ExecutionContext, traits::SpawnNamed};
 use sp_runtime::{generic::BlockId, traits::{self, Header}};
 use futures::{prelude::*, future::ready};
@@ -50,6 +53,30 @@ use api::SharedClient;
 
 pub use sp_offchain::{OffchainWorkerApi, STORAGE_PREFIX};
 
+/// NetworkProvider provides [`OffchainWorkers`] with all necessary hooks into the
+/// underlying Substrate networking.
+pub trait NetworkProvider: NetworkStateInfo {
+	/// Set the authorized peers.
+	fn set_authorized_peers(&self, peers: HashSet<PeerId>);
+	
+	/// Set the authorized only flag.
+	fn set_authorized_only(&self, reserved_only: bool);
+}
+
+impl<B, H> NetworkProvider for NetworkService<B, H>
+where
+	B: traits::Block + 'static,
+	H: ExHashT,
+{
+	fn set_authorized_peers(&self, peers: HashSet<PeerId>) {
+		self.set_authorized_peers(peers)
+	}
+
+	fn set_authorized_only(&self, reserved_only: bool) {
+		self.set_authorized_only(reserved_only)
+	}
+}
+
 /// An offchain workers manager.
 pub struct OffchainWorkers<Client, Storage, Block: traits::Block> {
 	client: Arc<Client>,
@@ -98,7 +125,7 @@ impl<Client, Storage, Block> OffchainWorkers<
 	pub fn on_block_imported(
 		&self,
 		header: &Block::Header,
-		network_state: Arc<dyn NetworkStateInfo + Send + Sync>,
+		network_provider: Arc<dyn NetworkProvider + Send + Sync>,
 		is_validator: bool,
 	) -> impl Future<Output = ()> {
 		let runtime = self.client.runtime_api();
@@ -122,7 +149,7 @@ impl<Client, Storage, Block> OffchainWorkers<
 		if version > 0 {
 			let (api, runner) = api::AsyncApi::new(
 				self.db.clone(),
-				network_state.clone(),
+				network_provider,
 				is_validator,
 				self.shared_client.clone(),
 			);
@@ -173,7 +200,7 @@ pub async fn notification_future<Client, Storage, Block, Spawner>(
 	client: Arc<Client>,
 	offchain: Arc<OffchainWorkers<Client, Storage, Block>>,
 	spawner: Spawner,
-	network_state_info: Arc<dyn NetworkStateInfo + Send + Sync>,
+	network_provider: Arc<dyn NetworkProvider + Send + Sync>,
 )
 	where
 		Block: traits::Block,
@@ -188,7 +215,7 @@ pub async fn notification_future<Client, Storage, Block, Spawner>(
 				"offchain-on-block",
 				offchain.on_block_imported(
 					&n.header,
-					network_state_info.clone(),
+					network_provider.clone(),
 					is_validator,
 				).boxed(),
 			);
@@ -213,9 +240,9 @@ mod tests {
 	use sc_transaction_pool::{BasicPool, FullChainApi};
 	use sp_transaction_pool::{TransactionPool, InPoolTransaction};
 
-	struct MockNetworkStateInfo();
+	struct TestNetwork();
 
-	impl NetworkStateInfo for MockNetworkStateInfo {
+	impl NetworkStateInfo for TestNetwork {
 		fn external_addresses(&self) -> Vec<Multiaddr> {
 			Vec::new()
 		}
@@ -225,6 +252,16 @@ mod tests {
 		}
 	}
 
+	impl NetworkProvider for TestNetwork {
+		fn set_authorized_peers(&self, _peers: HashSet<PeerId>) {
+			unimplemented!()
+		}
+
+		fn set_authorized_only(&self, _reserved_only: bool) {
+			unimplemented!()
+		}
+	}
+
 	struct TestPool(
 		Arc<BasicPool<FullChainApi<TestClient, Block>, Block>>
 	);
@@ -255,12 +292,14 @@ mod tests {
 			client.clone(),
 		));
 		let db = sc_client_db::offchain::LocalStorage::new_test();
-		let network_state = Arc::new(MockNetworkStateInfo());
+		let network = Arc::new(TestNetwork());
 		let header = client.header(&BlockId::number(0)).unwrap().unwrap();
 
 		// when
 		let offchain = OffchainWorkers::new(client, db);
-		futures::executor::block_on(offchain.on_block_imported(&header, network_state, false));
+		futures::executor::block_on(
+			offchain.on_block_imported(&header, network, false)
+		);
 
 		// then
 		assert_eq!(pool.0.status().ready, 1);

substrate/client/peerset/src/lib.rs

@@ -45,6 +45,7 @@ const FORGET_AFTER: Duration = Duration::from_secs(3600);
 enum Action {
 	AddReservedPeer(PeerId),
 	RemoveReservedPeer(PeerId),
+	SetReservedPeers(HashSet<PeerId>),
 	SetReservedOnly(bool),
 	ReportPeer(PeerId, ReputationChange),
 	SetPriorityGroup(String, HashSet<PeerId>),
@@ -102,6 +103,11 @@ impl PeersetHandle {
 	pub fn set_reserved_only(&self, reserved: bool) {
 		let _ = self.tx.unbounded_send(Action::SetReservedOnly(reserved));
 	}
+	
+	/// Set reserved peers to the new set.
+	pub fn set_reserved_peers(&self, peer_ids: HashSet<PeerId>) {
+		let _ = self.tx.unbounded_send(Action::SetReservedPeers(peer_ids));
+	}
 
 	/// Reports an adjustment to the reputation of the given peer.
 	pub fn report_peer(&self, peer_id: PeerId, score_diff: ReputationChange) {
@@ -246,6 +252,10 @@ impl Peerset {
 	fn on_remove_reserved_peer(&mut self, peer_id: PeerId) {
 		self.on_remove_from_priority_group(RESERVED_NODES, peer_id);
 	}
+	
+	fn on_set_reserved_peers(&mut self, peer_ids: HashSet<PeerId>) {
+		self.on_set_priority_group(RESERVED_NODES, peer_ids);
+	}
 
 	fn on_set_reserved_only(&mut self, reserved_only: bool) {
 		self.reserved_only = reserved_only;
@@ -655,6 +665,8 @@ impl Stream for Peerset {
 					self.on_add_reserved_peer(peer_id),
 				Action::RemoveReservedPeer(peer_id) =>
 					self.on_remove_reserved_peer(peer_id),
+				Action::SetReservedPeers(peer_ids) =>
+					self.on_set_reserved_peers(peer_ids),
 				Action::SetReservedOnly(reserved) =>
 					self.on_set_reserved_only(reserved),
 				Action::ReportPeer(peer_id, score_diff) =>

substrate/client/service/src/builder.rs

@@ -431,7 +431,7 @@ pub fn build_offchain_workers<TBl, TBackend, TCl>(
 				client.clone(),
 				offchain,
 				Clone::clone(&spawn_handle),
-				network.clone()
+				network.clone(),
 			)
 		);
 	}