[#493] node: Connect to main chain

Establish client connection with main chain node on storage node startup.
Client is configured simlarly to morph client.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

cmd/neofs-node/config.go

@@ -80,6 +80,9 @@ const (
 	cfgMorphNotifyRPCAddress  = "morph.notification_endpoint"
 	cfgMorphNotifyDialTimeout = "morph.dial_timeout"
 
+	cfgMainChainRPCAddress  = "mainchain.rpc_endpoint"
+	cfgMainChainDialTimeout = "mainchain.dial_timeout"
+
 	// config keys for cfgAccounting
 	cfgAccountingContract = "accounting.scripthash"
 	cfgAccountingFee      = "accounting.fee"
@@ -219,6 +222,8 @@ type cfg struct {
 	closers []func()
 
 	cfgReputation cfgReputation
+
+	mainChainClient *client.Client
 }
 
 type cfgGRPC struct {

cmd/neofs-node/morph.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"time"
 
 	"github.com/nspcc-dev/neo-go/pkg/core/block"
 	"github.com/nspcc-dev/neo-go/pkg/util"
@@ -27,7 +28,8 @@ var (
 func initMorphComponents(c *cfg) {
 	var err error
 
-	addresses := c.viper.GetStringSlice(cfgMorphRPCAddress)
+	fn := func(endpointCfg, dialTOCfg string, handler func(*client.Client)) {
+		addresses := c.viper.GetStringSlice(endpointCfg)
 		if len(addresses) == 0 {
 			fatalOnErr(errNoRPCEndpoints)
 		}
@@ -37,12 +39,20 @@ func initMorphComponents(c *cfg) {
 			addresses[i], addresses[j] = addresses[j], addresses[i]
 		})
 
+		var dialTimeout time.Duration
+
+		if dialTOCfg != "" {
+			dialTimeout = c.viper.GetDuration(dialTOCfg)
+		}
+
 		for i := range addresses {
-		c.cfgMorph.client, err = client.New(c.key, addresses[i])
+			cli, err := client.New(c.key, addresses[i], client.WithDialTimeout(dialTimeout))
 			if err == nil {
 				c.log.Info("neo RPC connection established",
 					zap.String("endpoint", addresses[i]))
 
+				handler(cli)
+
 				break
 			}
 
@@ -52,6 +62,17 @@ func initMorphComponents(c *cfg) {
 		}
 
 		fatalOnErr(err)
+	}
+
+	// replace to a separate initialing block during refactoring
+	// since current function initializes sidechain components
+	fn(cfgMainChainRPCAddress, cfgMainChainDialTimeout, func(cli *client.Client) {
+		c.mainChainClient = cli
+	})
+
+	fn(cfgMorphRPCAddress, "", func(cli *client.Client) {
+		c.cfgMorph.client = cli
+	})
 
 	staticClient, err := client.NewStatic(
 		c.cfgMorph.client,