Remove unnecessary duplicated best_seen_block from SyncState struct

client/network/common/src/sync.rs

@@ -74,8 +74,6 @@ pub struct StateDownloadProgress {
 pub struct SyncStatus<Block: BlockT> {
 	/// Current global sync state.
 	pub state: SyncState<NumberFor<Block>>,
-	/// Target sync block number.
-	pub best_seen_block: Option<NumberFor<Block>>,
 	/// Number of peers participating in syncing.
 	pub num_peers: u32,
 	/// Number of blocks queued for import

client/network/src/protocol.rs

@@ -52,7 +52,7 @@ use sc_network_common::{
 		warp::{EncodedProof, WarpProofRequest},
 		BadPeer, ChainSync, OnBlockData, OnBlockJustification, OnStateData, OpaqueBlockRequest,
 		OpaqueBlockResponse, OpaqueStateRequest, OpaqueStateResponse, PollBlockAnnounceValidation,
-		SyncStatus,
+		SyncState, SyncStatus,
 	},
 };
 use sp_arithmetic::traits::SaturatedConversion;
@@ -501,7 +501,11 @@ where
 
 	/// Target sync block number.
 	pub fn best_seen_block(&self) -> Option<NumberFor<B>> {
-		self.chain_sync.status().best_seen_block
+		match self.chain_sync.status().state {
+			SyncState::Idle => None,
+			SyncState::Downloading { target } => Some(target),
+			SyncState::Importing { .. } => None,
+		}
 	}
 
 	/// Number of peers participating in syncing.

client/network/sync/src/lib.rs

@@ -390,8 +390,6 @@ where
 	/// Returns the current sync status.
 	fn status(&self) -> SyncStatus<B> {
 		let median_seen = self.median_seen();
-		let best_seen_block =
-			median_seen.and_then(|median| (median > self.best_queued_number).then_some(median));
 		let sync_state = if let Some(target) = median_seen {
 			// A chain is classified as downloading if the provided best block is
 			// more than `MAJOR_SYNC_BLOCKS` behind the best block or as importing
@@ -424,7 +422,6 @@ where
 
 		SyncStatus {
 			state: sync_state,
-			best_seen_block,
 			num_peers: self.peers.len() as u32,
 			queued_blocks: self.queue_blocks.len() as u32,
 			state_sync: self.state_sync.as_ref().map(|s| s.progress()),