[#460] services/util: Remove HandleUnaryRequest

There is no need in a wrapper with many from-`interface{}` conversions.

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>

cmd/frostfs-node/accounting.go

@@ -21,10 +21,8 @@ func initAccountingService(ctx context.Context, c *cfg) {
 	server := accountingTransportGRPC.New(
 		accountingService.NewSignService(
 			&c.key.PrivateKey,
-			accountingService.NewResponseService(
+			accountingService.NewExecutionService(
-				accountingService.NewExecutionService(
+				accounting.NewExecutor(balanceMorphWrapper),
-					accounting.NewExecutor(balanceMorphWrapper),
-				),
 				c.respSvc,
 			),
 		),

cmd/frostfs-node/container.go

@@ -83,16 +83,13 @@ func initContainerService(ctx context.Context, c *cfg) {
 	server := containerTransportGRPC.New(
 		containerService.NewSignService(
 			&c.key.PrivateKey,
-			containerService.NewResponseService(
+			&usedSpaceService{
-				&usedSpaceService{
+				Server:               containerService.NewExecutionService(containerMorph.NewExecutor(cnrRdr, cnrWrt), c.respSvc),
-					Server:               containerService.NewExecutionService(containerMorph.NewExecutor(cnrRdr, cnrWrt)),
+				loadWriterProvider:   loadRouter,
-					loadWriterProvider:   loadRouter,
+				loadPlacementBuilder: loadPlacementBuilder,
-					loadPlacementBuilder: loadPlacementBuilder,
+				routeBuilder:         routeBuilder,
-					routeBuilder:         routeBuilder,
+				cfg:                  c,
-					cfg:                  c,
+			},
-				},
-				c.respSvc,
-			),
 		),
 	)
 
@@ -575,6 +572,8 @@ func (c *usedSpaceService) AnnounceUsedSpace(ctx context.Context, req *container
 	resp := new(containerV2.AnnounceUsedSpaceResponse)
 	resp.SetBody(respBody)
 
+	c.cfg.respSvc.SetMeta(resp)
+
 	return resp, nil
 }
 

cmd/frostfs-node/netmap.go

@@ -148,17 +148,15 @@ func initNetmapService(ctx context.Context, c *cfg) {
 	server := netmapTransportGRPC.New(
 		netmapService.NewSignService(
 			&c.key.PrivateKey,
-			netmapService.NewResponseService(
+			netmapService.NewExecutionService(
-				netmapService.NewExecutionService(
+				c,
-					c,
+				c.apiVersion,
-					c.apiVersion,
+				&netInfo{
-					&netInfo{
+					netState:          c.cfgNetmap.state,
-						netState:          c.cfgNetmap.state,
+					magic:             c.cfgMorph.client,
-						magic:             c.cfgMorph.client,
+					morphClientNetMap: c.cfgNetmap.wrapper,
-						morphClientNetMap: c.cfgNetmap.wrapper,
+					msPerBlockRdr:     c.cfgMorph.client.MsPerBlock,
-						msPerBlockRdr:     c.cfgMorph.client.MsPerBlock,
+				},
-					},
-				),
 				c.respSvc,
 			),
 		),

cmd/frostfs-node/session.go

@@ -53,10 +53,7 @@ func initSessionService(c *cfg) {
 	server := sessionTransportGRPC.New(
 		sessionSvc.NewSignService(
 			&c.key.PrivateKey,
-			sessionSvc.NewResponseService(
+			sessionSvc.NewExecutionService(c.privateTokenStore, c.respSvc, c.log),
-				sessionSvc.NewExecutionService(c.privateTokenStore, c.log),
-				c.respSvc,
-			),
 		),
 	)
 

pkg/services/accounting/executor.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/accounting"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/util/response"
 )
 
 type ServiceExecutor interface {
@@ -12,13 +13,15 @@ type ServiceExecutor interface {
 }
 
 type executorSvc struct {
-	exec ServiceExecutor
+	exec    ServiceExecutor
+	respSvc *response.Service
 }
 
 // NewExecutionService wraps ServiceExecutor and returns Accounting Service interface.
-func NewExecutionService(exec ServiceExecutor) Server {
+func NewExecutionService(exec ServiceExecutor, respSvc *response.Service) Server {
 	return &executorSvc{
-		exec: exec,
+		exec:    exec,
+		respSvc: respSvc,
 	}
 }
 
@@ -31,5 +34,6 @@ func (s *executorSvc) Balance(ctx context.Context, req *accounting.BalanceReques
 	resp := new(accounting.BalanceResponse)
 	resp.SetBody(respBody)
 
+	s.respSvc.SetMeta(resp)
 	return resp, nil
 }

pkg/services/accounting/response.go

@@ -1,37 +0,0 @@
-package accounting
-
-import (
-	"context"
-
-	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/accounting"
-	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/util"
-	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/util/response"
-)
-
-type responseService struct {
-	respSvc *response.Service
-
-	svc Server
-}
-
-// NewResponseService returns accounting service instance that passes internal service
-// call to response service.
-func NewResponseService(accSvc Server, respSvc *response.Service) Server {
-	return &responseService{
-		respSvc: respSvc,
-		svc:     accSvc,
-	}
-}
-
-func (s *responseService) Balance(ctx context.Context, req *accounting.BalanceRequest) (*accounting.BalanceResponse, error) {
-	resp, err := s.respSvc.HandleUnaryRequest(ctx, req,
-		func(ctx context.Context, req any) (util.ResponseMessage, error) {
-			return s.svc.Balance(ctx, req.(*accounting.BalanceRequest))
-		},
-	)
-	if err != nil {
-		return nil, err
-	}
-
-	return resp.(*accounting.BalanceResponse), nil
-}

pkg/services/container/executor.go

@@ -6,6 +6,7 @@ import (
 
 	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/container"
 	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/session"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/util/response"
 )
 
 type ServiceExecutor interface {
@@ -21,12 +22,15 @@ type executorSvc struct {
 	Server
 
 	exec ServiceExecutor
+
+	respSvc *response.Service
 }
 
 // NewExecutionService wraps ServiceExecutor and returns Container Service interface.
-func NewExecutionService(exec ServiceExecutor) Server {
+func NewExecutionService(exec ServiceExecutor, respSvc *response.Service) Server {
 	return &executorSvc{
-		exec: exec,
+		exec:    exec,
+		respSvc: respSvc,
 	}
 }
 
@@ -44,6 +48,7 @@ func (s *executorSvc) Put(ctx context.Context, req *container.PutRequest) (*cont
 	resp := new(container.PutResponse)
 	resp.SetBody(respBody)
 
+	s.respSvc.SetMeta(resp)
 	return resp, nil
 }
 
@@ -61,6 +66,7 @@ func (s *executorSvc) Delete(ctx context.Context, req *container.DeleteRequest)
 	resp := new(container.DeleteResponse)
 	resp.SetBody(respBody)
 
+	s.respSvc.SetMeta(resp)
 	return resp, nil
 }
 
@@ -73,6 +79,7 @@ func (s *executorSvc) Get(ctx context.Context, req *container.GetRequest) (*cont
 	resp := new(container.GetResponse)
 	resp.SetBody(respBody)
 
+	s.respSvc.SetMeta(resp)
 	return resp, nil
 }
 
@@ -85,6 +92,7 @@ func (s *executorSvc) List(ctx context.Context, req *container.ListRequest) (*co
 	resp := new(container.ListResponse)
 	resp.SetBody(respBody)
 
+	s.respSvc.SetMeta(resp)
 	return resp, nil
 }
 
@@ -102,6 +110,7 @@ func (s *executorSvc) SetExtendedACL(ctx context.Context, req *container.SetExte
 	resp := new(container.SetExtendedACLResponse)
 	resp.SetBody(respBody)
 
+	s.respSvc.SetMeta(resp)
 	return resp, nil
 }
 
@@ -114,5 +123,6 @@ func (s *executorSvc) GetExtendedACL(ctx context.Context, req *container.GetExte
 	resp := new(container.GetExtendedACLResponse)
 	resp.SetBody(respBody)
 
+	s.respSvc.SetMeta(resp)
 	return resp, nil
 }

pkg/services/container/response.go

@@ -1,115 +0,0 @@
-package container
-
-import (
-	"context"
-
-	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/container"
-	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/util"
-	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/util/response"
-)
-
-type responseService struct {
-	respSvc *response.Service
-
-	svc Server
-}
-
-// NewResponseService returns container service instance that passes internal service
-// call to response service.
-func NewResponseService(cnrSvc Server, respSvc *response.Service) Server {
-	return &responseService{
-		respSvc: respSvc,
-		svc:     cnrSvc,
-	}
-}
-
-func (s *responseService) Put(ctx context.Context, req *container.PutRequest) (*container.PutResponse, error) {
-	resp, err := s.respSvc.HandleUnaryRequest(ctx, req,
-		func(ctx context.Context, req any) (util.ResponseMessage, error) {
-			return s.svc.Put(ctx, req.(*container.PutRequest))
-		},
-	)
-	if err != nil {
-		return nil, err
-	}
-
-	return resp.(*container.PutResponse), nil
-}
-
-func (s *responseService) Delete(ctx context.Context, req *container.DeleteRequest) (*container.DeleteResponse, error) {
-	resp, err := s.respSvc.HandleUnaryRequest(ctx, req,
-		func(ctx context.Context, req any) (util.ResponseMessage, error) {
-			return s.svc.Delete(ctx, req.(*container.DeleteRequest))
-		},
-	)
-	if err != nil {
-		return nil, err
-	}
-
-	return resp.(*container.DeleteResponse), nil
-}
-
-func (s *responseService) Get(ctx context.Context, req *container.GetRequest) (*container.GetResponse, error) {
-	resp, err := s.respSvc.HandleUnaryRequest(ctx, req,
-		func(ctx context.Context, req any) (util.ResponseMessage, error) {
-			return s.svc.Get(ctx, req.(*container.GetRequest))
-		},
-	)
-	if err != nil {
-		return nil, err
-	}
-
-	return resp.(*container.GetResponse), nil
-}
-
-func (s *responseService) List(ctx context.Context, req *container.ListRequest) (*container.ListResponse, error) {
-	resp, err := s.respSvc.HandleUnaryRequest(ctx, req,
-		func(ctx context.Context, req any) (util.ResponseMessage, error) {
-			return s.svc.List(ctx, req.(*container.ListRequest))
-		},
-	)
-	if err != nil {
-		return nil, err
-	}
-
-	return resp.(*container.ListResponse), nil
-}
-
-func (s *responseService) SetExtendedACL(ctx context.Context, req *container.SetExtendedACLRequest) (*container.SetExtendedACLResponse, error) {
-	resp, err := s.respSvc.HandleUnaryRequest(ctx, req,
-		func(ctx context.Context, req any) (util.ResponseMessage, error) {
-			return s.svc.SetExtendedACL(ctx, req.(*container.SetExtendedACLRequest))
-		},
-	)
-	if err != nil {
-		return nil, err
-	}
-
-	return resp.(*container.SetExtendedACLResponse), nil
-}
-
-func (s *responseService) GetExtendedACL(ctx context.Context, req *container.GetExtendedACLRequest) (*container.GetExtendedACLResponse, error) {
-	resp, err := s.respSvc.HandleUnaryRequest(ctx, req,
-		func(ctx context.Context, req any) (util.ResponseMessage, error) {
-			return s.svc.GetExtendedACL(ctx, req.(*container.GetExtendedACLRequest))
-		},
-	)
-	if err != nil {
-		return nil, err
-	}
-
-	return resp.(*container.GetExtendedACLResponse), nil
-}
-
-func (s *responseService) AnnounceUsedSpace(ctx context.Context, req *container.AnnounceUsedSpaceRequest) (*container.AnnounceUsedSpaceResponse, error) {
-	resp, err := s.respSvc.HandleUnaryRequest(ctx, req,
-		func(ctx context.Context, req any) (util.ResponseMessage, error) {
-			return s.svc.AnnounceUsedSpace(ctx, req.(*container.AnnounceUsedSpaceRequest))
-		},
-	)
-	if err != nil {
-		return nil, err
-	}
-
-	return resp.(*container.AnnounceUsedSpaceResponse), nil
-}

pkg/services/netmap/executor.go

@@ -8,6 +8,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/netmap"
 	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/refs"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/version"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/util/response"
 	netmapSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
 	versionsdk "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/version"
 )
@@ -18,6 +19,8 @@ type executorSvc struct {
 	state NodeState
 
 	netInfo NetworkInfo
+
+	respSvc *response.Service
 }
 
 // NodeState encapsulates information
@@ -42,8 +45,8 @@ type NetworkInfo interface {
 	Dump(versionsdk.Version) (*netmapSDK.NetworkInfo, error)
 }
 
-func NewExecutionService(s NodeState, v versionsdk.Version, netInfo NetworkInfo) Server {
+func NewExecutionService(s NodeState, v versionsdk.Version, netInfo NetworkInfo, respSvc *response.Service) Server {
-	if s == nil || netInfo == nil || !version.IsValid(v) {
+	if s == nil || netInfo == nil || !version.IsValid(v) || respSvc == nil {
 		// this should never happen, otherwise it programmers bug
 		panic("can't create netmap execution service")
 	}
@@ -51,6 +54,7 @@ func NewExecutionService(s NodeState, v versionsdk.Version, netInfo NetworkInfo)
 	res := &executorSvc{
 		state:   s,
 		netInfo: netInfo,
+		respSvc: respSvc,
 	}
 
 	v.WriteToV2(&res.version)
@@ -96,6 +100,7 @@ func (s *executorSvc) LocalNodeInfo(
 	resp := new(netmap.LocalNodeInfoResponse)
 	resp.SetBody(body)
 
+	s.respSvc.SetMeta(resp)
 	return resp, nil
 }
 
@@ -126,6 +131,7 @@ func (s *executorSvc) NetworkInfo(
 	resp := new(netmap.NetworkInfoResponse)
 	resp.SetBody(body)
 
+	s.respSvc.SetMeta(resp)
 	return resp, nil
 }
 
@@ -143,5 +149,6 @@ func (s *executorSvc) Snapshot(_ context.Context, _ *netmap.SnapshotRequest) (*n
 	resp := new(netmap.SnapshotResponse)
 	resp.SetBody(body)
 
+	s.respSvc.SetMeta(resp)
 	return resp, nil
 }

pkg/services/netmap/response.go

@@ -1,63 +0,0 @@
-package netmap
-
-import (
-	"context"
-
-	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/netmap"
-	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/util"
-	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/util/response"
-)
-
-type responseService struct {
-	respSvc *response.Service
-
-	svc Server
-}
-
-// NewResponseService returns netmap service instance that passes internal service
-// call to response service.
-func NewResponseService(nmSvc Server, respSvc *response.Service) Server {
-	return &responseService{
-		respSvc: respSvc,
-		svc:     nmSvc,
-	}
-}
-
-func (s *responseService) LocalNodeInfo(ctx context.Context, req *netmap.LocalNodeInfoRequest) (*netmap.LocalNodeInfoResponse, error) {
-	resp, err := s.respSvc.HandleUnaryRequest(ctx, req,
-		func(ctx context.Context, req any) (util.ResponseMessage, error) {
-			return s.svc.LocalNodeInfo(ctx, req.(*netmap.LocalNodeInfoRequest))
-		},
-	)
-	if err != nil {
-		return nil, err
-	}
-
-	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 any) (util.ResponseMessage, error) {
-			return s.svc.NetworkInfo(ctx, req.(*netmap.NetworkInfoRequest))
-		},
-	)
-	if err != nil {
-		return nil, err
-	}
-
-	return resp.(*netmap.NetworkInfoResponse), nil
-}
-
-func (s *responseService) Snapshot(ctx context.Context, req *netmap.SnapshotRequest) (*netmap.SnapshotResponse, error) {
-	resp, err := s.respSvc.HandleUnaryRequest(ctx, req,
-		func(ctx context.Context, req any) (util.ResponseMessage, error) {
-			return s.svc.Snapshot(ctx, req.(*netmap.SnapshotRequest))
-		},
-	)
-	if err != nil {
-		return nil, err
-	}
-
-	return resp.(*netmap.SnapshotResponse), nil
-}

pkg/services/object/response.go

@@ -91,16 +91,13 @@ func (s *ResponseService) Put() (PutObjectStream, error) {
 }
 
 func (s *ResponseService) Head(ctx context.Context, req *object.HeadRequest) (*object.HeadResponse, error) {
-	resp, err := s.respSvc.HandleUnaryRequest(ctx, req,
+	resp, err := s.svc.Head(ctx, req)
-		func(ctx context.Context, req any) (util.ResponseMessage, error) {
-			return s.svc.Head(ctx, req.(*object.HeadRequest))
-		},
-	)
 	if err != nil {
 		return nil, err
 	}
 
-	return resp.(*object.HeadResponse), nil
+	s.respSvc.SetMeta(resp)
+	return resp, nil
 }
 
 func (s *searchStreamResponser) Send(resp *object.SearchResponse) error {
@@ -117,16 +114,13 @@ func (s *ResponseService) Search(req *object.SearchRequest, stream SearchStream)
 }
 
 func (s *ResponseService) Delete(ctx context.Context, req *object.DeleteRequest) (*object.DeleteResponse, error) {
-	resp, err := s.respSvc.HandleUnaryRequest(ctx, req,
+	resp, err := s.svc.Delete(ctx, req)
-		func(ctx context.Context, req any) (util.ResponseMessage, error) {
-			return s.svc.Delete(ctx, req.(*object.DeleteRequest))
-		},
-	)
 	if err != nil {
 		return nil, err
 	}
 
-	return resp.(*object.DeleteResponse), nil
+	s.respSvc.SetMeta(resp)
+	return resp, nil
 }
 
 func (s *getRangeStreamResponser) Send(resp *object.GetRangeResponse) error {
@@ -143,14 +137,11 @@ func (s *ResponseService) GetRange(req *object.GetRangeRequest, stream GetObject
 }
 
 func (s *ResponseService) GetRangeHash(ctx context.Context, req *object.GetRangeHashRequest) (*object.GetRangeHashResponse, error) {
-	resp, err := s.respSvc.HandleUnaryRequest(ctx, req,
+	resp, err := s.svc.GetRangeHash(ctx, req)
-		func(ctx context.Context, req any) (util.ResponseMessage, error) {
-			return s.svc.GetRangeHash(ctx, req.(*object.GetRangeHashRequest))
-		},
-	)
 	if err != nil {
 		return nil, err
 	}
 
-	return resp.(*object.GetRangeHashResponse), nil
+	s.respSvc.SetMeta(resp)
+	return resp, nil
 }

pkg/services/session/executor.go

@@ -6,6 +6,7 @@ import (
 
 	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/session"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/util/response"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
 	"go.uber.org/zap"
 )
@@ -17,14 +18,17 @@ type ServiceExecutor interface {
 type executorSvc struct {
 	exec ServiceExecutor
 
+	respSvc *response.Service
+
 	log *logger.Logger
 }
 
 // NewExecutionService wraps ServiceExecutor and returns Session Service interface.
-func NewExecutionService(exec ServiceExecutor, l *logger.Logger) Server {
+func NewExecutionService(exec ServiceExecutor, respSvc *response.Service, l *logger.Logger) Server {
 	return &executorSvc{
-		exec: exec,
+		exec:    exec,
-		log:  l,
+		log:     l,
+		respSvc: respSvc,
 	}
 }
 
@@ -42,5 +46,6 @@ func (s *executorSvc) Create(ctx context.Context, req *session.CreateRequest) (*
 	resp := new(session.CreateResponse)
 	resp.SetBody(respBody)
 
+	s.respSvc.SetMeta(resp)
 	return resp, nil
 }

pkg/services/session/response.go

@@ -1,37 +0,0 @@
-package session
-
-import (
-	"context"
-
-	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/session"
-	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/util"
-	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/util/response"
-)
-
-type responseService struct {
-	respSvc *response.Service
-
-	svc Server
-}
-
-// NewResponseService returns session service instance that passes internal service
-// call to response service.
-func NewResponseService(ssSvc Server, respSvc *response.Service) Server {
-	return &responseService{
-		respSvc: respSvc,
-		svc:     ssSvc,
-	}
-}
-
-func (s *responseService) Create(ctx context.Context, req *session.CreateRequest) (*session.CreateResponse, error) {
-	resp, err := s.respSvc.HandleUnaryRequest(ctx, req,
-		func(ctx context.Context, req any) (util.ResponseMessage, error) {
-			return s.svc.Create(ctx, req.(*session.CreateRequest))
-		},
-	)
-	if err != nil {
-		return nil, err
-	}
-
-	return resp.(*session.CreateResponse), nil
-}

pkg/services/util/response/client_stream.go

@@ -10,7 +10,7 @@ import (
 // ClientMessageStreamer represents client-side message streamer
 // that sets meta values to the response.
 type ClientMessageStreamer struct {
-	cfg *cfg
+	srv *Service
 
 	send util.RequestMessageWriter
 
@@ -33,7 +33,7 @@ func (s *ClientMessageStreamer) CloseAndRecv(ctx context.Context) (util.Response
 		return nil, fmt.Errorf("(%T) could not close stream and receive response: %w", s, err)
 	}
 
-	setMeta(resp, s.cfg)
+	s.srv.SetMeta(resp)
 
 	return resp, nil
 }
@@ -41,7 +41,7 @@ func (s *ClientMessageStreamer) CloseAndRecv(ctx context.Context) (util.Response
 // CreateRequestStreamer wraps stream methods and returns ClientMessageStreamer instance.
 func (s *Service) CreateRequestStreamer(sender util.RequestMessageWriter, closer util.ClientStreamCloser) *ClientMessageStreamer {
 	return &ClientMessageStreamer{
-		cfg:   s.cfg,
+		srv:   s,
 		send:  sender,
 		close: closer,
 	}

pkg/services/util/response/server_stream.go

@@ -9,7 +9,7 @@ import (
 // ServerMessageStreamer represents server-side message streamer
 // that sets meta values to all response messages.
 type ServerMessageStreamer struct {
-	cfg *cfg
+	srv *Service
 
 	recv util.ResponseMessageReader
 }
@@ -22,7 +22,7 @@ func (s *ServerMessageStreamer) Recv() (util.ResponseMessage, error) {
 		return nil, fmt.Errorf("could not receive response message for signing: %w", err)
 	}
 
-	setMeta(m, s.cfg)
+	s.srv.SetMeta(m)
 
 	return m, nil
 }
@@ -30,7 +30,7 @@ func (s *ServerMessageStreamer) Recv() (util.ResponseMessage, error) {
 // HandleServerStreamRequest builds internal streamer via handlers, wraps it to ServerMessageStreamer and returns the result.
 func (s *Service) HandleServerStreamRequest(respWriter util.ResponseMessageWriter) util.ResponseMessageWriter {
 	return func(resp util.ResponseMessage) error {
-		setMeta(resp, s.cfg)
+		s.SetMeta(resp)
 
 		return respWriter(resp)
 	}

pkg/services/util/response/service.go

@@ -44,11 +44,12 @@ func NewService(opts ...Option) *Service {
 	}
 }
 
-func setMeta(resp util.ResponseMessage, cfg *cfg) {
+// SetMeta sets adds meta-header to resp.
+func (s *Service) SetMeta(resp util.ResponseMessage) {
 	meta := new(session.ResponseMetaHeader)
-	meta.SetVersion(&cfg.version)
+	meta.SetVersion(&s.cfg.version)
 	meta.SetTTL(1) // FIXME: #1160 TTL must be calculated
-	meta.SetEpoch(cfg.state.CurrentEpoch())
+	meta.SetEpoch(s.cfg.state.CurrentEpoch())
 
 	if origin := resp.GetMetaHeader(); origin != nil {
 		// FIXME: #1160 what if origin is set by local server?

pkg/services/util/response/unary.go

@@ -1,21 +0,0 @@
-package response
-
-import (
-	"context"
-	"fmt"
-
-	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/util"
-)
-
-// HandleUnaryRequest call passes request to handler, sets response meta header values and returns it.
-func (s *Service) HandleUnaryRequest(ctx context.Context, req any, handler util.UnaryHandler) (util.ResponseMessage, error) {
-	// process request
-	resp, err := handler(ctx, req)
-	if err != nil {
-		return nil, fmt.Errorf("could not handle request: %w", err)
-	}
-
-	setMeta(resp, s.cfg)
-
-	return resp, nil
-}