node: init blockchain state on startup

Fixes #3066 on cold starts.

Signed-off-by: Pavel Karpy <[email protected]>

cmd/neofs-node/config.go

@@ -725,6 +725,9 @@ func initBasics(c *cfg, key *keys.PrivateKey, stateStorage *state.PersistentStor
 	lookupScriptHashesInNNS(cli, c.applicationConfiguration, &b)
 
 	nState := newNetworkState()
+	currBlock, err := cli.BlockCount()
+	fatalOnErr(err)
+	nState.block.Store(currBlock)
 
 	cnrWrap, err := cntClient.NewFromMorph(cli, b.containerSH, 0)
 	fatalOnErr(err)
@@ -738,6 +741,10 @@ func initBasics(c *cfg, key *keys.PrivateKey, stateStorage *state.PersistentStor
 	nmWrap, err := nmClient.NewFromMorph(cli, b.netmapSH, 0)
 	fatalOnErr(err)
 
+	eDuration, err := nmWrap.EpochDuration()
+	fatalOnErr(err)
+	nState.epochDuration.Store(eDuration)
+
 	ttl := c.applicationConfiguration.fsChain.cacheTTL
 	if ttl == 0 {
 		msPerBlock, err := cli.MsPerBlock()