feat: add sync rpc client pool to wallet connectivity

- add sync pool and `obtain_base_node_sync_rpc_client`
- add `get_header` to base node rpc

base_layer/core/src/base_node/rpc/mod.rs

@@ -24,18 +24,6 @@
 mod service;
 #[cfg(feature = "base_node")]
 use crate::base_node::StateMachineHandle;
-use crate::proto::{
-    base_node::{
-        FetchMatchingUtxos,
-        FetchUtxosResponse,
-        Signatures,
-        TipInfoResponse,
-        TxQueryBatchResponses,
-        TxQueryResponse,
-        TxSubmissionResponse,
-    },
-    types::{Signature, Transaction},
-};
 #[cfg(feature = "base_node")]
 use crate::{
     chain_storage::{async_db::AsyncBlockchainDb, BlockchainBackend},
@@ -44,6 +32,22 @@ use crate::{
 #[cfg(feature = "base_node")]
 pub use service::BaseNodeWalletRpcService;
 
+use crate::{
+    proto,
+    proto::{
+        base_node::{
+            FetchMatchingUtxos,
+            FetchUtxosResponse,
+            Signatures,
+            TipInfoResponse,
+            TxQueryBatchResponses,
+            TxQueryResponse,
+            TxSubmissionResponse,
+        },
+        types::{Signature, Transaction},
+    },
+};
+
 use tari_comms::protocol::rpc::{Request, Response, RpcStatus};
 use tari_comms_rpc_macros::tari_rpc;
 
@@ -72,6 +76,9 @@ pub trait BaseNodeWalletService: Send + Sync + 'static {
 
     #[rpc(method = 5)]
     async fn get_tip_info(&self, request: Request<()>) -> Result<Response<TipInfoResponse>, RpcStatus>;
+
+    #[rpc(method = 6)]
+    async fn get_header(&self, request: Request<u64>) -> Result<Response<proto::core::BlockHeader>, RpcStatus>;
 }
 
 #[cfg(feature = "base_node")]

base_layer/core/src/base_node/rpc/service.rs

@@ -24,6 +24,7 @@ use crate::{
     base_node::{rpc::BaseNodeWalletService, state_machine_service::states::StateInfo, StateMachineHandle},
     chain_storage::{async_db::AsyncBlockchainDb, BlockchainBackend, PrunedOutput},
     mempool::{service::MempoolHandle, TxStorageResponse},
+    proto,
     proto::{
         base_node::{
             FetchMatchingUtxos,
@@ -327,4 +328,16 @@ impl<B: BlockchainBackend + 'static> BaseNodeWalletService for BaseNodeWalletRpc
             is_synced,
         }))
     }
+
+    async fn get_header(&self, request: Request<u64>) -> Result<Response<proto::core::BlockHeader>, RpcStatus> {
+        let height = request.into_message();
+        let header = self
+            .db()
+            .fetch_header(height)
+            .await
+            .map_err(RpcStatus::log_internal_error(LOG_TARGET))?
+            .ok_or_else(|| RpcStatus::not_found(format!("Header not found at height {}", height)))?;
+
+        Ok(Response::new(header.into()))
+    }
 }

base_layer/wallet/src/base_node_service/monitor.rs

@@ -122,11 +122,11 @@ impl<T: WalletBackend + 'static> BaseNodeMonitor<T> {
             let peer_node_id = self.update_connectivity_status().await;
             let mut client = self
                 .wallet_connectivity
-                .obtain_base_node_rpc_client()
+                .obtain_base_node_wallet_rpc_client()
                 .await
                 .ok_or(BaseNodeMonitorError::NodeShuttingDown)?;
             let latency = client.get_last_request_latency().await?;
-            trace!(
+            debug!(
                 target: LOG_TARGET,
                 "Base node {} latency: {} ms",
                 peer_node_id,

base_layer/wallet/src/connectivity_service/handle.rs

@@ -27,11 +27,12 @@ use futures::{
     SinkExt,
 };
 use tari_comms::{peer_manager::NodeId, protocol::rpc::RpcClientLease};
-use tari_core::base_node::rpc;
+use tari_core::base_node::{rpc::BaseNodeWalletRpcClient, sync::rpc::BaseNodeSyncRpcClient};
 use tokio::sync::watch;
 
 pub enum WalletConnectivityRequest {
-    ObtainBaseNodeWalletRpcClient(oneshot::Sender<RpcClientLease<rpc::BaseNodeWalletRpcClient>>),
+    ObtainBaseNodeWalletRpcClient(oneshot::Sender<RpcClientLease<BaseNodeWalletRpcClient>>),
+    ObtainBaseNodeSyncRpcClient(oneshot::Sender<RpcClientLease<BaseNodeSyncRpcClient>>),
     SetBaseNode(NodeId),
 }
 
@@ -68,7 +69,7 @@ impl WalletConnectivityHandle {
     /// node/nodes. It will be block until this is happens. The ONLY other time it will return is if the node is
     /// shutting down, where it will return None. Use this function whenever no work can be done without a
     /// BaseNodeWalletRpcClient RPC session.
-    pub async fn obtain_base_node_rpc_client(&mut self) -> Option<RpcClientLease<rpc::BaseNodeWalletRpcClient>> {
+    pub async fn obtain_base_node_wallet_rpc_client(&mut self) -> Option<RpcClientLease<BaseNodeWalletRpcClient>> {
         let (reply_tx, reply_rx) = oneshot::channel();
         // Under what conditions do the (1) mpsc channel and (2) oneshot channel error?
         // (1) when the receiver has been dropped
@@ -85,6 +86,22 @@ impl WalletConnectivityHandle {
         reply_rx.await.ok()
     }
 
+    /// Obtain a BaseNodeSyncRpcClient.
+    ///
+    /// This can be relied on to obtain a pooled BaseNodeSyncRpcClient rpc session from a currently selected base
+    /// node/nodes. It will be block until this is happens. The ONLY other time it will return is if the node is
+    /// shutting down, where it will return None. Use this function whenever no work can be done without a
+    /// BaseNodeSyncRpcClient RPC session.
+    pub async fn obtain_base_node_sync_rpc_client(&mut self) -> Option<RpcClientLease<BaseNodeSyncRpcClient>> {
+        let (reply_tx, reply_rx) = oneshot::channel();
+        self.sender
+            .send(WalletConnectivityRequest::ObtainBaseNodeSyncRpcClient(reply_tx))
+            .await
+            .ok()?;
+
+        reply_rx.await.ok()
+    }
+
     pub async fn get_connectivity_status(&mut self) -> OnlineStatus {
         self.online_status_rx.recv().await.unwrap_or(OnlineStatus::Offline)
     }

base_layer/wallet/src/connectivity_service/service.rs

@@ -36,7 +36,7 @@ use tari_comms::{
     peer_manager::NodeId,
     protocol::rpc::{RpcClientLease, RpcClientPool},
 };
-use tari_core::base_node::rpc;
+use tari_core::base_node::{rpc::BaseNodeWalletRpcClient, sync::rpc::BaseNodeSyncRpcClient};
 use tokio::time;
 
 const LOG_TARGET: &str = "wallet::connectivity";
@@ -54,9 +54,14 @@ pub struct WalletConnectivityService {
     request_stream: Fuse<mpsc::Receiver<WalletConnectivityRequest>>,
     connectivity: ConnectivityRequester,
     base_node_watch: Watch<Option<NodeId>>,
-    base_node_wallet_rpc_client_pool: Option<RpcClientPool<rpc::BaseNodeWalletRpcClient>>,
+    pools: Option<ClientPoolContainer>,
     online_status_watch: Watch<OnlineStatus>,
-    pending_base_node_rpc_requests: Vec<oneshot::Sender<RpcClientLease<rpc::BaseNodeWalletRpcClient>>>,
+    pending_requests: Vec<ReplyOneshot>,
+}
+
+struct ClientPoolContainer {
+    pub base_node_wallet_rpc_client: RpcClientPool<BaseNodeWalletRpcClient>,
+    pub base_node_sync_rpc_client: RpcClientPool<BaseNodeSyncRpcClient>,
 }
 
 impl WalletConnectivityService {
@@ -72,8 +77,8 @@ impl WalletConnectivityService {
             request_stream: request_stream.fuse(),
             connectivity,
             base_node_watch,
-            base_node_wallet_rpc_client_pool: None,
-            pending_base_node_rpc_requests: Vec::new(),
+            pools: None,
+            pending_requests: Vec::new(),
             online_status_watch,
         }
     }
@@ -100,7 +105,10 @@ impl WalletConnectivityService {
         use WalletConnectivityRequest::*;
         match request {
             ObtainBaseNodeWalletRpcClient(reply) => {
-                self.handle_get_base_node_wallet_rpc_client(reply).await;
+                self.handle_pool_request(reply.into()).await;
+            },
+            ObtainBaseNodeSyncRpcClient(reply) => {
+                self.handle_pool_request(reply.into()).await;
             },
 
             SetBaseNode(peer) => {
@@ -109,12 +117,20 @@ impl WalletConnectivityService {
         }
     }
 
+    async fn handle_pool_request(&mut self, reply: ReplyOneshot) {
+        use ReplyOneshot::*;
+        match reply {
+            WalletRpc(tx) => self.handle_get_base_node_wallet_rpc_client(tx).await,
+            SyncRpc(tx) => self.handle_get_base_node_sync_rpc_client(tx).await,
+        }
+    }
+
     async fn handle_get_base_node_wallet_rpc_client(
         &mut self,
-        reply: oneshot::Sender<RpcClientLease<rpc::BaseNodeWalletRpcClient>>,
+        reply: oneshot::Sender<RpcClientLease<BaseNodeWalletRpcClient>>,
     ) {
-        match self.base_node_wallet_rpc_client_pool {
-            Some(ref pool) => match pool.get().await {
+        match self.pools {
+            Some(ref pools) => match pools.base_node_wallet_rpc_client.get().await {
                 Ok(client) => {
                     let _ = reply.send(client);
                 },
@@ -124,16 +140,47 @@ impl WalletConnectivityService {
                         "Base node connection failed: {}. Reconnecting...", e
                     );
                     self.trigger_reconnect();
-                    self.pending_base_node_rpc_requests.push(reply);
+                    self.pending_requests.push(reply.into());
                 },
             },
             None => {
-                self.pending_base_node_rpc_requests.push(reply);
+                self.pending_requests.push(reply.into());
                 if self.base_node_watch.borrow().is_none() {
                     warn!(
                         target: LOG_TARGET,
                         "{} requests are waiting for base node to be set",
-                        self.pending_base_node_rpc_requests.len()
+                        self.pending_requests.len()
+                    );
+                }
+            },
+        }
+    }
+
+    async fn handle_get_base_node_sync_rpc_client(
+        &mut self,
+        reply: oneshot::Sender<RpcClientLease<BaseNodeSyncRpcClient>>,
+    ) {
+        match self.pools {
+            Some(ref pools) => match pools.base_node_sync_rpc_client.get().await {
+                Ok(client) => {
+                    let _ = reply.send(client);
+                },
+                Err(e) => {
+                    warn!(
+                        target: LOG_TARGET,
+                        "Base node connection failed: {}. Reconnecting...", e
+                    );
+                    self.trigger_reconnect();
+                    self.pending_requests.push(reply.into());
+                },
+            },
+            None => {
+                self.pending_requests.push(reply.into());
+                if self.base_node_watch.borrow().is_none() {
+                    warn!(
+                        target: LOG_TARGET,
+                        "{} requests are waiting for base node to be set",
+                        self.pending_requests.len()
                     );
                 }
             },
@@ -151,12 +198,12 @@ impl WalletConnectivityService {
     }
 
     fn set_base_node_peer(&mut self, peer: NodeId) {
-        self.base_node_wallet_rpc_client_pool = None;
+        self.pools = None;
         self.base_node_watch.broadcast(Some(peer));
     }
 
     async fn setup_base_node_connection(&mut self, peer: NodeId) {
-        self.base_node_wallet_rpc_client_pool = None;
+        self.pools = None;
         loop {
             debug!(
                 target: LOG_TARGET,
@@ -194,8 +241,10 @@ impl WalletConnectivityService {
             "Successfully established peer connection to base node {}",
             conn.peer_node_id()
         );
-        let pool = conn.create_rpc_client_pool(self.config.base_node_rpc_pool_size);
-        self.base_node_wallet_rpc_client_pool = Some(pool);
+        self.pools = Some(ClientPoolContainer {
+            base_node_sync_rpc_client: conn.create_rpc_client_pool(self.config.base_node_rpc_pool_size),
+            base_node_wallet_rpc_client: conn.create_rpc_client_pool(self.config.base_node_rpc_pool_size),
+        });
         self.notify_pending_requests().await?;
         debug!(
             target: LOG_TARGET,
@@ -206,14 +255,40 @@ impl WalletConnectivityService {
     }
 
     async fn notify_pending_requests(&mut self) -> Result<(), WalletConnectivityError> {
-        let current_pending = mem::take(&mut self.pending_base_node_rpc_requests);
+        let current_pending = mem::take(&mut self.pending_requests);
         for reply in current_pending {
             if reply.is_canceled() {
                 continue;
             }
 
-            self.handle_get_base_node_wallet_rpc_client(reply).await;
+            self.handle_pool_request(reply).await;
         }
         Ok(())
     }
 }
+
+enum ReplyOneshot {
+    WalletRpc(oneshot::Sender<RpcClientLease<BaseNodeWalletRpcClient>>),
+    SyncRpc(oneshot::Sender<RpcClientLease<BaseNodeSyncRpcClient>>),
+}
+
+impl ReplyOneshot {
+    pub fn is_canceled(&self) -> bool {
+        use ReplyOneshot::*;
+        match self {
+            WalletRpc(tx) => tx.is_canceled(),
+            SyncRpc(tx) => tx.is_canceled(),
+        }
+    }
+}
+
+impl From<oneshot::Sender<RpcClientLease<BaseNodeWalletRpcClient>>> for ReplyOneshot {
+    fn from(tx: oneshot::Sender<RpcClientLease<BaseNodeWalletRpcClient>>) -> Self {
+        ReplyOneshot::WalletRpc(tx)
+    }
+}
+impl From<oneshot::Sender<RpcClientLease<BaseNodeSyncRpcClient>>> for ReplyOneshot {
+    fn from(tx: oneshot::Sender<RpcClientLease<BaseNodeSyncRpcClient>>) -> Self {
+        ReplyOneshot::SyncRpc(tx)
+    }
+}

base_layer/wallet/src/connectivity_service/test.rs

@@ -87,7 +87,7 @@ async fn it_dials_peer_when_base_node_is_set() {
     // Now a connection will given to the service
     mock_state.add_active_connection(conn).await;
 
-    let rpc_client = handle.obtain_base_node_rpc_client().await.unwrap();
+    let rpc_client = handle.obtain_base_node_wallet_rpc_client().await.unwrap();
     assert!(rpc_client.is_connected());
 }
 
@@ -106,7 +106,7 @@ async fn it_resolves_many_pending_rpc_session_requests() {
     let pending_requests = iter::repeat_with(|| {
         let mut handle = handle.clone();
         task::spawn(async move {
-            let rpc_client = handle.obtain_base_node_rpc_client().await.unwrap();
+            let rpc_client = handle.obtain_base_node_wallet_rpc_client().await.unwrap();
             rpc_client.is_connected()
         })
     })
@@ -140,7 +140,7 @@ async fn it_changes_to_a_new_base_node() {
     assert_eq!(mock_state.count_calls_containing("AddManagedPeer").await, 1);
     let _ = mock_state.take_calls().await;
 
-    let rpc_client = handle.obtain_base_node_rpc_client().await.unwrap();
+    let rpc_client = handle.obtain_base_node_wallet_rpc_client().await.unwrap();
     assert!(rpc_client.is_connected());
 
     // Initiate a connection to the base node
@@ -150,7 +150,7 @@ async fn it_changes_to_a_new_base_node() {
     mock_state.expect_dial_peer(base_node_peer2.node_id()).await;
     assert_eq!(mock_state.count_calls_containing("AddManagedPeer").await, 1);
 
-    let rpc_client = handle.obtain_base_node_rpc_client().await.unwrap();
+    let rpc_client = handle.obtain_base_node_wallet_rpc_client().await.unwrap();
     assert!(rpc_client.is_connected());
 }
 
@@ -178,7 +178,7 @@ async fn it_gracefully_handles_connect_fail_reconnect() {
         let barrier = barrier.clone();
         async move {
             barrier.wait().await;
-            let rpc_client = handle.obtain_base_node_rpc_client().await.unwrap();
+            let rpc_client = handle.obtain_base_node_wallet_rpc_client().await.unwrap();
             assert!(rpc_client.is_connected());
         }
     });
@@ -215,7 +215,7 @@ async fn it_gracefully_handles_multiple_connection_failures() {
         let barrier = barrier.clone();
         async move {
             barrier.wait().await;
-            let rpc_client = handle.obtain_base_node_rpc_client().await.unwrap();
+            let rpc_client = handle.obtain_base_node_wallet_rpc_client().await.unwrap();
             assert!(rpc_client.is_connected());
         }
     });