chore: fix bootnodes handshake

dot/sync/chain_sync.go

@@ -169,18 +169,14 @@ func newChainSync(cfg chainSyncConfig) *chainSync {
 	}
 }
 
-func (cs *chainSync) retrieveTargetFromBootnodes() error {
+func (cs *chainSync) waitWorkersAndTarget() {
+	waitPeersTimer := time.NewTimer(cs.waitPeersDuration)
+
 	highestFinalizedHeader, err := cs.blockState.GetHighestFinalisedHeader()
 	if err != nil {
-		return err
+		panic(fmt.Sprintf("failed to get highest finalised header: %v", err))
 	}
 
-	return cs.network.BlockAnnounceHandshake(highestFinalizedHeader)
-}
-
-func (cs *chainSync) waitWorkersAndTarget() {
-	waitPeersTimer := time.NewTimer(cs.waitPeersDuration)
-
 	for {
 		cs.workerPool.useConnectedPeers()
 		totalAvailable := cs.workerPool.totalWorkers()
@@ -190,6 +186,11 @@ func (cs *chainSync) waitWorkersAndTarget() {
 			return
 		}
 
+		err := cs.network.BlockAnnounceHandshake(highestFinalizedHeader)
+		if err != nil && !errors.Is(err, network.ErrNoPeersConnected) {
+			logger.Errorf("retrieving target info from peers: %v", err)
+		}
+
 		select {
 		case <-waitPeersTimer.C:
 			waitPeersTimer.Reset(cs.waitPeersDuration)
@@ -207,11 +208,6 @@ func (cs *chainSync) start() {
 	cs.wg.Add(1)
 	go cs.pendingBlocks.run(cs.finalisedCh, cs.stopCh, &cs.wg)
 
-	err := cs.retrieveTargetFromBootnodes()
-	if err != nil {
-		logger.Errorf("failed retrieve target from bootnodes: %v", err)
-	}
-
 	// wait until we have a minimal workers in the sync worker pool
 	cs.waitWorkersAndTarget()
 }