[explorer][sync] make updateConsensusInformation only happens for explorer node

api/service/syncing/syncing.go

@@ -152,13 +152,14 @@ func (sc *SyncConfig) RemovePeer(peer *SyncPeerConfig) {
 }
 
 // CreateStateSync returns the implementation of StateSyncInterface interface.
-func CreateStateSync(ip string, port string, peerHash [20]byte) *StateSync {
+func CreateStateSync(ip string, port string, peerHash [20]byte, isExplorer bool) *StateSync {
 	stateSync := &StateSync{}
 	stateSync.selfip = ip
 	stateSync.selfport = port
 	stateSync.selfPeerHash = peerHash
 	stateSync.commonBlocks = make(map[int]*types.Block)
 	stateSync.lastMileBlocks = []*types.Block{}
+	stateSync.isExplorer = isExplorer
 	stateSync.syncConfig = &SyncConfig{}
 	return stateSync
 }
@@ -171,6 +172,7 @@ type StateSync struct {
 	commonBlocks       map[int]*types.Block
 	lastMileBlocks     []*types.Block // last mile blocks to catch up with the consensus
 	syncConfig         *SyncConfig
+	isExplorer         bool
 	stateSyncTaskQueue *queue.Queue
 	syncMux            sync.Mutex
 	lastMileMux        sync.Mutex
@@ -1025,9 +1027,10 @@ func (ss *StateSync) SyncLoop(bc *core.BlockChain, worker *worker.Worker, isBeac
 		if err := ss.addConsensusLastMile(bc, consensus); err != nil {
 			utils.Logger().Error().Err(err).Msg("[SYNC] Add consensus last mile")
 		}
-		// This logic is only needed for explorer node.
+		// TODO: move this to explorer handler code.
-		// TODO: refactor this.
+		if ss.isExplorer {
-		consensus.UpdateConsensusInformation()
+			consensus.UpdateConsensusInformation()
+		}
 	}
 	ss.purgeAllBlocksFromCache()
 }

api/service/syncing/syncing_test.go

@@ -95,7 +95,7 @@ func TestCompareSyncPeerConfigByblockHashes(t *testing.T) {
 }
 
 func TestCreateStateSync(t *testing.T) {
-	stateSync := CreateStateSync("127.0.0.1", "8000", [20]byte{})
+	stateSync := CreateStateSync("127.0.0.1", "8000", [20]byte{}, false)
 
 	if stateSync == nil {
 		t.Error("Unable to create stateSync")

node/node_syncing.go

@@ -64,11 +64,16 @@ func (node *Node) DoSyncWithoutConsensus() {
 // IsSameHeight tells whether node is at same bc height as a peer
 func (node *Node) IsSameHeight() (uint64, bool) {
 	if node.stateSync == nil {
-		node.stateSync = syncing.CreateStateSync(node.SelfPeer.IP, node.SelfPeer.Port, node.GetSyncID())
+		node.stateSync = node.getStateSync()
 	}
 	return node.stateSync.IsSameBlockchainHeight(node.Blockchain())
 }
 
+func (node *Node) getStateSync() *syncing.StateSync {
+	return syncing.CreateStateSync(node.SelfPeer.IP, node.SelfPeer.Port,
+		node.GetSyncID(), node.NodeConfig.Role() == nodeconfig.ExplorerNode)
+}
+
 // SyncingPeerProvider is an interface for getting the peers in the given shard.
 type SyncingPeerProvider interface {
 	SyncingPeers(shardID uint32) (peers []p2p.Peer, err error)
@@ -198,7 +203,7 @@ func (node *Node) DoBeaconSyncing() {
 	for {
 		if node.beaconSync == nil {
 			utils.Logger().Info().Msg("initializing beacon sync")
-			node.beaconSync = syncing.CreateStateSync(node.SelfPeer.IP, node.SelfPeer.Port, node.GetSyncID())
+			node.beaconSync = node.getStateSync()
 		}
 		if node.beaconSync.GetActivePeerNumber() == 0 {
 			utils.Logger().Info().Msg("no peers; bootstrapping beacon sync config")
@@ -298,7 +303,7 @@ func (node *Node) SupportSyncing() {
 	}
 
 	if node.stateSync == nil {
-		node.stateSync = syncing.CreateStateSync(node.SelfPeer.IP, node.SelfPeer.Port, node.GetSyncID())
+		node.stateSync = node.getStateSync()
 		utils.Logger().Debug().Msg("[SYNC] initialized state sync")
 	}