node: init blockchain state on startup

cmd/neofs-node/config.go

@@ -724,7 +724,10 @@
 
 	lookupScriptHashesInNNS(cli, c.applicationConfiguration, &b)
 
-	nState := newNetworkState()
+	nState := newNetworkState(c.log)
+	currBlock, err := cli.BlockCount()
+	fatalOnErr(err)
+	nState.block.Store(currBlock)
 
 	cnrWrap, err := cntClient.NewFromMorph(cli, b.containerSH, 0)
 	fatalOnErr(err)
@@ -738,6 +741,10 @@
 	nmWrap, err := nmClient.NewFromMorph(cli, b.netmapSH, 0)
 	fatalOnErr(err)
 
+	eDuration, err := nmWrap.EpochDuration()
+	fatalOnErr(err)
+	nState.updateEpochDuration(eDuration)
+
 	ttl := c.applicationConfiguration.fsChain.cacheTTL
 	if ttl == 0 {
 		msPerBlock, err := cli.MsPerBlock()

cmd/neofs-node/netmap.go

@@ -22,8 +22,13 @@
 	"go.uber.org/zap"
 )
 
+// defaultEpochDuration is a default epoch duration to replace zero from FS chain.
+const defaultEpochDuration = 240
+
 // primary solution of local network state dump.
 type networkState struct {
+	l *zap.Logger
+
 	epoch         atomic.Uint64
 	block         atomic.Uint32
 	epochDuration atomic.Uint64
@@ -35,11 +40,12 @@
 	metrics *metrics.NodeMetrics
 }
 
-func newNetworkState() *networkState {
+func newNetworkState(l *zap.Logger) *networkState {
 	var nmStatus atomic.Value
 	nmStatus.Store(control.NetmapStatus_STATUS_UNDEFINED)
 
 	return &networkState{
+		l:                l,
 		controlNetStatus: nmStatus,
 	}
 }
@@ -62,6 +68,16 @@
 	s.metrics.SetEpoch(v)
 }
 
+func (s *networkState) updateEpochDuration(v uint64) {
+	if v != 0 {
+		s.epochDuration.Store(v)
+		return
+	}
+
+	s.l.Warn("zero epoch duration received, fallback to default value", zap.Uint64("applied default value", defaultEpochDuration))
+	s.epochDuration.Store(defaultEpochDuration)
+}
+
 func (s *networkState) setNodeInfo(ni *netmapSDK.NodeInfo) {
 	ctrlNetSt := control.NetmapStatus_STATUS_UNDEFINED
 

cmd/neofs-node/reputation.go

@@ -229,8 +229,7 @@
 				log.Debug("could not fetch epoch duration", zap.Error(err))
 				return
 			}
-
-			c.networkState.epochDuration.Store(duration)
+			c.networkState.updateEpochDuration(duration)
 
 			iterations, err := c.cfgNetmap.wrapper.EigenTrustIterations()
 			if err != nil {