[#398] cmd/node: Serve NetmapService.NetworkInfo RPC

Implement `NetworkInfo` calls on full stack of Netmap services. Current
epoch is read from node local state, magic number is read via `MagicNumber`
call of morph client.

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

cmd/neofs-node/netmap.go

@@ -3,9 +3,11 @@ package main
 import (
 	"bytes"
 
-	"github.com/nspcc-dev/neofs-api-go/pkg/netmap"
+	netmapSDK "github.com/nspcc-dev/neofs-api-go/pkg/netmap"
+	netmapV2 "github.com/nspcc-dev/neofs-api-go/v2/netmap"
 	netmapGRPC "github.com/nspcc-dev/neofs-api-go/v2/netmap/grpc"
 	crypto "github.com/nspcc-dev/neofs-crypto"
+	"github.com/nspcc-dev/neofs-node/pkg/core/netmap"
 	"github.com/nspcc-dev/neofs-node/pkg/morph/event"
 	netmapEvent "github.com/nspcc-dev/neofs-node/pkg/morph/event/netmap"
 	netmapTransportGRPC "github.com/nspcc-dev/neofs-node/pkg/network/transport/netmap/grpc"
@@ -36,14 +38,18 @@ func (s *networkState) setCurrentEpoch(v uint64) {
 }
 
 func initNetmapService(c *cfg) {
-	peerInfo := new(netmap.NodeInfo)
+	peerInfo := new(netmapSDK.NodeInfo)
 	peerInfo.SetAddress(c.localAddr.String())
 	peerInfo.SetPublicKey(crypto.MarshalPublicKey(&c.key.PublicKey))
 	peerInfo.SetAttributes(c.cfgNodeInfo.attributes...)
-	peerInfo.SetState(netmap.NodeStateOffline)
+	peerInfo.SetState(netmapSDK.NodeStateOffline)
 
 	c.handleLocalNodeInfo(peerInfo)
 
+	if c.cfgMorph.client == nil {
+		initMorphComponents(c)
+	}
+
 	netmapGRPC.RegisterNetmapServiceServer(c.cfgGRPC.server,
 		netmapTransportGRPC.New(
 			netmapService.NewSignService(
@@ -52,6 +58,10 @@ func initNetmapService(c *cfg) {
 					netmapService.NewExecutionService(
 						c,
 						c.apiVersion,
+						&netInfo{
+							netState: c.cfgNetmap.state,
+							magic:    c.cfgMorph.client,
+						},
 					),
 					c.respSvc,
 				),
@@ -137,7 +147,7 @@ func initState(c *cfg) {
 	c.cfgNetmap.state.setCurrentEpoch(epoch)
 }
 
-func (c *cfg) netmapLocalNodeState(epoch uint64) (*netmap.NodeInfo, error) {
+func (c *cfg) netmapLocalNodeState(epoch uint64) (*netmapSDK.NodeInfo, error) {
 	// calculate current network state
 	nm, err := c.cfgNetmap.wrapper.GetNetMapByEpoch(epoch)
 	if err != nil {
@@ -147,7 +157,7 @@ func (c *cfg) netmapLocalNodeState(epoch uint64) (*netmap.NodeInfo, error) {
 	return c.localNodeInfoFromNetmap(nm), nil
 }
 
-func (c *cfg) localNodeInfoFromNetmap(nm *netmap.Netmap) *netmap.NodeInfo {
+func (c *cfg) localNodeInfoFromNetmap(nm *netmapSDK.Netmap) *netmapSDK.NodeInfo {
 	for _, n := range nm.Nodes {
 		if bytes.Equal(n.PublicKey(), crypto.MarshalPublicKey(&c.key.PublicKey)) {
 			return n.NodeInfo
@@ -164,7 +174,7 @@ func addNewEpochNotificationHandler(c *cfg, h event.Handler) {
 func goOffline(c *cfg) {
 	err := c.cfgNetmap.wrapper.UpdatePeerState(
 		crypto.MarshalPublicKey(&c.key.PublicKey),
-		netmap.NodeStateOffline,
+		netmapSDK.NodeStateOffline,
 	)
 
 	if err != nil {
@@ -181,10 +191,10 @@ func (c *cfg) SetNetmapStatus(st control.NetmapStatus) error {
 		return c.cfgNetmap.wrapper.AddPeer(c.toOnlineLocalNodeInfo())
 	}
 
-	var apiState netmap.NodeState
+	var apiState netmapSDK.NodeState
 
 	if st == control.NetmapStatus_OFFLINE {
-		apiState = netmap.NodeStateOffline
+		apiState = netmapSDK.NodeStateOffline
 	}
 
 	return c.cfgNetmap.wrapper.UpdatePeerState(
@@ -192,3 +202,19 @@ func (c *cfg) SetNetmapStatus(st control.NetmapStatus) error {
 		apiState,
 	)
 }
+
+type netInfo struct {
+	netState netmap.State
+
+	magic interface {
+		MagicNumber() uint64
+	}
+}
+
+func (n *netInfo) Dump() (*netmapV2.NetworkInfo, error) {
+	ni := new(netmapV2.NetworkInfo)
+	ni.SetCurrentEpoch(n.netState.CurrentEpoch())
+	ni.SetMagicNumber(n.magic.MagicNumber())
+
+	return ni, nil
+}

go.mod

@@ -16,7 +16,7 @@ require (
 	github.com/multiformats/go-multihash v0.0.13 // indirect
 	github.com/nspcc-dev/hrw v1.0.9
 	github.com/nspcc-dev/neo-go v0.93.0
-	github.com/nspcc-dev/neofs-api-go v1.23.0
+	github.com/nspcc-dev/neofs-api-go v1.23.1-0.20210219132553-e2b0887be93d
 	github.com/nspcc-dev/neofs-crypto v0.3.0
 	github.com/nspcc-dev/tzhash v1.4.0
 	github.com/panjf2000/ants/v2 v2.3.0

pkg/network/transport/netmap/grpc/service.go

@@ -32,3 +32,14 @@ func (s *Server) LocalNodeInfo(
 
 	return netmap.LocalNodeInfoResponseToGRPCMessage(resp), nil
 }
+
+// NetworkInfo converts gRPC request message and passes it to internal netmap service.
+func (s *Server) NetworkInfo(ctx context.Context, req *netmapGRPC.NetworkInfoRequest) (*netmapGRPC.NetworkInfoResponse, error) {
+	resp, err := s.srv.NetworkInfo(ctx, netmap.NetworkInfoRequestFromGRPCMessage(req))
+	if err != nil {
+		// TODO: think about how we transport errors through gRPC
+		return nil, err
+	}
+
+	return netmap.NetworkInfoResponseToGRPCMessage(resp), nil
+}

pkg/services/netmap/executor.go

@@ -10,6 +10,8 @@ import (
 type executorSvc struct {
 	version *pkg.Version
 	state   NodeState
+
+	netInfo NetworkInfo
 }
 
 // NodeState encapsulates information
@@ -20,8 +22,16 @@ type NodeState interface {
 	LocalNodeInfo() (*netmap.NodeInfo, error)
 }
 
-func NewExecutionService(s NodeState, v *pkg.Version) netmap.Service {
+// NetworkInfo encapsulates source of the
-	if s == nil || v == nil {
+// recent information about the NeoFS network.
+type NetworkInfo interface {
+	// Must return recent network information.
+	// in NeoFS API v2 NetworkInfo structure.
+	Dump() (*netmap.NetworkInfo, error)
+}
+
+func NewExecutionService(s NodeState, v *pkg.Version, netInfo NetworkInfo) netmap.Service {
+	if s == nil || v == nil || netInfo == nil {
 		// this should never happen, otherwise it programmers bug
 		panic("can't create netmap execution service")
 	}
@@ -29,6 +39,7 @@ func NewExecutionService(s NodeState, v *pkg.Version) netmap.Service {
 	return &executorSvc{
 		version: v,
 		state:   s,
+		netInfo: netInfo,
 	}
 }
 
@@ -49,3 +60,20 @@ func (s *executorSvc) LocalNodeInfo(
 
 	return resp, nil
 }
+
+func (s *executorSvc) NetworkInfo(
+	_ context.Context,
+	_ *netmap.NetworkInfoRequest) (*netmap.NetworkInfoResponse, error) {
+	ni, err := s.netInfo.Dump()
+	if err != nil {
+		return nil, err
+	}
+
+	body := new(netmap.NetworkInfoResponseBody)
+	body.SetNetworkInfo(ni)
+
+	resp := new(netmap.NetworkInfoResponse)
+	resp.SetBody(body)
+
+	return resp, nil
+}

pkg/services/netmap/response.go

@@ -35,3 +35,16 @@ func (s *responseService) LocalNodeInfo(ctx context.Context, req *netmap.LocalNo
 
 	return resp.(*netmap.LocalNodeInfoResponse), nil
 }
+
+func (s *responseService) NetworkInfo(ctx context.Context, req *netmap.NetworkInfoRequest) (*netmap.NetworkInfoResponse, error) {
+	resp, err := s.respSvc.HandleUnaryRequest(ctx, req,
+		func(ctx context.Context, req interface{}) (util.ResponseMessage, error) {
+			return s.svc.NetworkInfo(ctx, req.(*netmap.NetworkInfoRequest))
+		},
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return resp.(*netmap.NetworkInfoResponse), nil
+}

pkg/services/netmap/sign.go

@@ -35,3 +35,16 @@ func (s *signService) LocalNodeInfo(
 
 	return resp.(*netmap.LocalNodeInfoResponse), nil
 }
+
+func (s *signService) NetworkInfo(ctx context.Context, req *netmap.NetworkInfoRequest) (*netmap.NetworkInfoResponse, error) {
+	resp, err := s.sigSvc.HandleUnaryRequest(ctx, req,
+		func(ctx context.Context, req interface{}) (util.ResponseMessage, error) {
+			return s.svc.NetworkInfo(ctx, req.(*netmap.NetworkInfoRequest))
+		},
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return resp.(*netmap.NetworkInfoResponse), nil
+}