diff --git a/cmd/neofs-cli/modules/container.go b/cmd/neofs-cli/modules/container.go
index 721059de2d..53c7c7db85 100644
--- a/cmd/neofs-cli/modules/container.go
+++ b/cmd/neofs-cli/modules/container.go
@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"context"
 	"encoding/json"
-	"errors"
 	"fmt"
 	"io/ioutil"
 	"math"
@@ -21,11 +20,9 @@ import (
 	"github.com/nspcc-dev/neofs-api-go/pkg/netmap"
 	"github.com/nspcc-dev/neofs-api-go/pkg/object"
 	"github.com/nspcc-dev/neofs-api-go/pkg/owner"
-	v2container "github.com/nspcc-dev/neofs-api-go/v2/container"
-	grpccontainer "github.com/nspcc-dev/neofs-api-go/v2/container/grpc"
 	"github.com/nspcc-dev/neofs-node/pkg/policy"
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
-	"google.golang.org/protobuf/proto"
 )
 
 const (
@@ -275,15 +272,10 @@ var getContainerInfoCmd = &cobra.Command{
 				return fmt.Errorf("can't read file: %w", err)
 			}
 
-			// todo: make more user friendly way to parse raw data
-			msg := new(grpccontainer.Container)
-			if proto.Unmarshal(data, msg) != nil {
-				return errors.New("can't unmarshal container")
+			cnr = container.New()
+			if err := cnr.Unmarshal(data); err != nil {
+				return errors.Wrap(err, "can't unmarshal container")
 			}
-
-			v2cnr := v2container.ContainerFromGRPCMessage(msg)
-
-			cnr = container.NewContainerFromV2(v2cnr)
 		} else {
 			cli, err := getSDKClient()
 			if err != nil {
@@ -315,7 +307,7 @@ var getContainerInfoCmd = &cobra.Command{
 					return fmt.Errorf("can't JSON encode container: %w", err)
 				}
 			} else {
-				data, err = cnr.ToV2().StableMarshal(nil)
+				data, err = cnr.Marshal()
 				if err != nil {
 					return fmt.Errorf("can't binary encode container: %w", err)
 				}
@@ -372,7 +364,7 @@ var getExtendedACLCmd = &cobra.Command{
 				return fmt.Errorf("can't enode to JSON: %w", err)
 			}
 		} else {
-			data, err = eaclTable.ToV2().StableMarshal(nil)
+			data, err = eaclTable.Marshal()
 			if err != nil {
 				return fmt.Errorf("can't enode to binary: %w", err)
 			}
@@ -415,7 +407,7 @@ Container ID in EACL table will be substituted with ID from the CLI.`,
 		}
 
 		if containerAwait {
-			exp, err := eaclTable.ToV2().StableMarshal(nil)
+			exp, err := eaclTable.Marshal()
 			if err != nil {
 				return errors.New("broken EACL table")
 			}
@@ -428,7 +420,7 @@ Container ID in EACL table will be substituted with ID from the CLI.`,
 				table, err := cli.GetEACL(ctx, id, client.WithTTL(getTTL()))
 				if err == nil {
 					// compare binary values because EACL could have been set already
-					got, err := table.ToV2().StableMarshal(nil)
+					got, err := table.Marshal()
 					if err != nil {
 						continue
 					}
diff --git a/cmd/neofs-cli/modules/object.go b/cmd/neofs-cli/modules/object.go
index 6470f68914..53a647cae5 100644
--- a/cmd/neofs-cli/modules/object.go
+++ b/cmd/neofs-cli/modules/object.go
@@ -3,7 +3,6 @@ package cmd
 import (
 	"context"
 	"encoding/hex"
-	"encoding/json"
 	"errors"
 	"fmt"
 	"io"
@@ -628,9 +627,9 @@ func marshalHeader(cmd *cobra.Command, hdr *object.Object) ([]byte, error) {
 	case toJson && toProto:
 		return nil, errors.New("'--json' and '--proto' flags are mutually exclusive")
 	case toJson:
-		return json.Marshal(hdr) // TODO currently not supported by neofs-api-go
+		return hdr.MarshalJSON()
 	case toProto:
-		return hdr.ToV2().StableMarshal(nil)
+		return hdr.Marshal()
 	default:
 		return nil, nil
 	}
diff --git a/cmd/neofs-cli/modules/util.go b/cmd/neofs-cli/modules/util.go
index 0510d08e10..01d38bcd30 100644
--- a/cmd/neofs-cli/modules/util.go
+++ b/cmd/neofs-cli/modules/util.go
@@ -112,7 +112,7 @@ func signBearerToken(cmd *cobra.Command, _ []string) error {
 			return fmt.Errorf("can't JSON encode bearer token: %w", err)
 		}
 	} else {
-		data, err = btok.ToV2().StableMarshal(nil)
+		data, err = btok.Marshal()
 		if err != nil {
 			return fmt.Errorf("can't binary encode bearer token: %w", err)
 		}
@@ -151,7 +151,7 @@ func convertEACLTable(cmd *cobra.Command, _ []string) error {
 			return fmt.Errorf("can't JSON encode extended ACL table: %w", err)
 		}
 	} else {
-		data, err = table.ToV2().StableMarshal(nil)
+		data, err = table.Marshal()
 		if err != nil {
 			return fmt.Errorf("can't binary encode extended ACL table: %w", err)
 		}
diff --git a/cmd/neofs-node/attributes.go b/cmd/neofs-node/attributes.go
index d7e7266e77..47db20606e 100644
--- a/cmd/neofs-node/attributes.go
+++ b/cmd/neofs-node/attributes.go
@@ -3,8 +3,7 @@ package main
 import (
 	"strconv"
 
-	sdk "github.com/nspcc-dev/neofs-api-go/pkg/netmap"
-	"github.com/nspcc-dev/neofs-api-go/v2/netmap"
+	"github.com/nspcc-dev/neofs-api-go/pkg/netmap"
 	"github.com/nspcc-dev/neofs-node/pkg/util/attributes"
 	"github.com/spf13/viper"
 )
@@ -15,7 +14,7 @@ const (
 	defaultPrice    = 0
 )
 
-func parseAttributes(v *viper.Viper) []*netmap.Attribute {
+func parseAttributes(v *viper.Viper) []*netmap.NodeAttribute {
 	stringAttributes := readAttributes(v)
 
 	attrs, err := attributes.ParseV2Attributes(stringAttributes, nil)
@@ -41,14 +40,14 @@ func readAttributes(v *viper.Viper) (attrs []string) {
 	return attrs
 }
 
-func addWellKnownAttributes(attrs []*netmap.Attribute) []*netmap.Attribute {
+func addWellKnownAttributes(attrs []*netmap.NodeAttribute) []*netmap.NodeAttribute {
 	var hasCapacity, hasPrice bool
 
 	// check if user defined capacity and price attributes
 	for i := range attrs {
-		if !hasPrice && attrs[i].GetKey() == sdk.PriceAttr {
+		if !hasPrice && attrs[i].Key() == netmap.PriceAttr {
 			hasPrice = true
-		} else if !hasCapacity && attrs[i].GetKey() == sdk.CapacityAttr {
+		} else if !hasCapacity && attrs[i].Key() == netmap.CapacityAttr {
 			hasCapacity = true
 		}
 	}
@@ -56,15 +55,15 @@ func addWellKnownAttributes(attrs []*netmap.Attribute) []*netmap.Attribute {
 	// do not override user defined capacity and price attributes
 
 	if !hasCapacity {
-		capacity := new(netmap.Attribute)
-		capacity.SetKey(sdk.CapacityAttr)
+		capacity := netmap.NewNodeAttribute()
+		capacity.SetKey(netmap.CapacityAttr)
 		capacity.SetValue(strconv.FormatUint(defaultCapacity, 10))
 		attrs = append(attrs, capacity)
 	}
 
 	if !hasPrice {
-		price := new(netmap.Attribute)
-		price.SetKey(sdk.PriceAttr)
+		price := netmap.NewNodeAttribute()
+		price.SetKey(netmap.PriceAttr)
 		price.SetValue(strconv.FormatUint(defaultPrice, 10))
 		attrs = append(attrs, price)
 	}
diff --git a/cmd/neofs-node/config.go b/cmd/neofs-node/config.go
index 6c090bb5de..7456c51752 100644
--- a/cmd/neofs-node/config.go
+++ b/cmd/neofs-node/config.go
@@ -11,7 +11,7 @@ import (
 
 	"github.com/nspcc-dev/neo-go/pkg/util"
 	"github.com/nspcc-dev/neofs-api-go/pkg"
-	"github.com/nspcc-dev/neofs-api-go/v2/netmap"
+	"github.com/nspcc-dev/neofs-api-go/pkg/netmap"
 	crypto "github.com/nspcc-dev/neofs-crypto"
 	"github.com/nspcc-dev/neofs-node/misc"
 	"github.com/nspcc-dev/neofs-node/pkg/core/container"
@@ -194,7 +194,7 @@ type BootstrapType uint32
 type cfgNodeInfo struct {
 	// values from config
 	bootType   BootstrapType
-	attributes []*netmap.Attribute
+	attributes []*netmap.NodeAttribute
 
 	// values at runtime
 	info *netmap.NodeInfo
diff --git a/cmd/neofs-node/netmap.go b/cmd/neofs-node/netmap.go
index af012486d8..3b1a64fa92 100644
--- a/cmd/neofs-node/netmap.go
+++ b/cmd/neofs-node/netmap.go
@@ -1,7 +1,7 @@
 package main
 
 import (
-	"github.com/nspcc-dev/neofs-api-go/v2/netmap"
+	"github.com/nspcc-dev/neofs-api-go/pkg/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/morph/event"
@@ -36,7 +36,7 @@ func initNetmapService(c *cfg) {
 	peerInfo := new(netmap.NodeInfo)
 	peerInfo.SetAddress(c.localAddr.String())
 	peerInfo.SetPublicKey(crypto.MarshalPublicKey(&c.key.PublicKey))
-	peerInfo.SetAttributes(c.cfgNodeInfo.attributes)
+	peerInfo.SetAttributes(c.cfgNodeInfo.attributes...)
 
 	c.cfgNodeInfo.info = peerInfo
 
@@ -46,7 +46,7 @@ func initNetmapService(c *cfg) {
 				c.key,
 				netmapService.NewResponseService(
 					netmapService.NewExecutionService(
-						c.cfgNodeInfo.info,
+						c.cfgNodeInfo.info.ToV2(),
 						c.apiVersion,
 					),
 					c.respSvc,
diff --git a/pkg/innerring/invoke/netmap.go b/pkg/innerring/invoke/netmap.go
index c688d16079..aba384aeec 100644
--- a/pkg/innerring/invoke/netmap.go
+++ b/pkg/innerring/invoke/netmap.go
@@ -5,17 +5,14 @@ import (
 	"github.com/nspcc-dev/neo-go/pkg/util"
 	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
 	"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"
 	"github.com/nspcc-dev/neofs-node/pkg/morph/client"
 	"github.com/pkg/errors"
-	"google.golang.org/protobuf/proto"
 )
 
 type (
 	UpdatePeerArgs struct {
 		Key    *keys.PublicKey
-		Status uint32
+		Status netmap.NodeState
 	}
 
 	SetConfigArgs struct {
@@ -140,14 +137,14 @@ func NetmapSnapshot(cli *client.Client, con util.Uint160) (*netmap.Netmap, error
 			return nil, errors.Wrap(err, "invalid RPC response")
 		}
 
-		result = append(result, *netmap.NewNodeInfoFromV2(nodeInfo))
+		result = append(result, *nodeInfo)
 	}
 
 	return netmap.NewNetmap(netmap.NodesFromInfo(result))
 }
 
-func peerInfoFromStackItem(prm stackitem.Item) (*netmapv2.NodeInfo, error) {
-	node := new(netmapgrpc.NodeInfo)
+func peerInfoFromStackItem(prm stackitem.Item) (*netmap.NodeInfo, error) {
+	node := netmap.NewNodeInfo()
 
 	subItems, err := client.ArrayFromStackItem(prm)
 	if err != nil {
@@ -156,9 +153,9 @@ func peerInfoFromStackItem(prm stackitem.Item) (*netmapv2.NodeInfo, error) {
 		return nil, errors.New("invalid RPC response")
 	} else if rawNodeInfo, err := client.BytesFromStackItem(subItems[0]); err != nil {
 		return nil, err
-	} else if err = proto.Unmarshal(rawNodeInfo, node); err != nil {
+	} else if err = node.Unmarshal(rawNodeInfo); err != nil {
 		return nil, err
 	}
 
-	return netmapv2.NodeInfoFromGRPCMessage(node), nil
+	return node, nil
 }
diff --git a/pkg/innerring/processors/container/process_container.go b/pkg/innerring/processors/container/process_container.go
index 9879f937d2..9d994344bc 100644
--- a/pkg/innerring/processors/container/process_container.go
+++ b/pkg/innerring/processors/container/process_container.go
@@ -1,10 +1,7 @@
 package container
 
 import (
-	"github.com/golang/protobuf/proto"
 	containerSDK "github.com/nspcc-dev/neofs-api-go/pkg/container"
-	v2container "github.com/nspcc-dev/neofs-api-go/v2/container"
-	containerGRPC "github.com/nspcc-dev/neofs-api-go/v2/container/grpc"
 	"github.com/nspcc-dev/neofs-node/pkg/core/container"
 	"github.com/nspcc-dev/neofs-node/pkg/innerring/invoke"
 	containerEvent "github.com/nspcc-dev/neofs-node/pkg/morph/event/container"
@@ -22,9 +19,8 @@ func (cp *Processor) processContainerPut(put *containerEvent.Put) {
 	cnrData := put.Container()
 
 	// unmarshal container structure
-	// FIXME: temp solution, replace after neofs-api-go#168
-	cnrProto := new(containerGRPC.Container)
-	if err := proto.Unmarshal(cnrData, cnrProto); err != nil {
+	cnr := containerSDK.New()
+	if err := cnr.Unmarshal(cnrData); err != nil {
 		cp.log.Info("could not unmarshal container structure",
 			zap.String("error", err.Error()),
 		)
@@ -32,10 +28,6 @@ func (cp *Processor) processContainerPut(put *containerEvent.Put) {
 		return
 	}
 
-	cnr := containerSDK.NewContainerFromV2(
-		v2container.ContainerFromGRPCMessage(cnrProto),
-	)
-
 	// perform format check
 	if err := container.CheckFormat(cnr); err != nil {
 		cp.log.Info("container with incorrect format detected",
diff --git a/pkg/innerring/processors/netmap/process_cleanup.go b/pkg/innerring/processors/netmap/process_cleanup.go
index 35a0987298..d37ddd0832 100644
--- a/pkg/innerring/processors/netmap/process_cleanup.go
+++ b/pkg/innerring/processors/netmap/process_cleanup.go
@@ -2,7 +2,7 @@ package netmap
 
 import (
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
-	"github.com/nspcc-dev/neofs-api-go/v2/netmap"
+	"github.com/nspcc-dev/neofs-api-go/pkg/netmap"
 	"github.com/nspcc-dev/neofs-node/pkg/innerring/invoke"
 	"go.uber.org/zap"
 )
@@ -27,7 +27,7 @@ func (np *Processor) processNetmapCleanupTick(epoch uint64) {
 
 		err = invoke.UpdatePeerState(np.morphClient, np.netmapContract, &invoke.UpdatePeerArgs{
 			Key:    key,
-			Status: uint32(netmap.Offline),
+			Status: netmap.NodeStateOffline,
 		})
 		if err != nil {
 			np.log.Error("can't invoke netmap.UpdateState", zap.Error(err))
diff --git a/pkg/innerring/processors/netmap/process_peers.go b/pkg/innerring/processors/netmap/process_peers.go
index 217d67e5c1..d612f35ed9 100644
--- a/pkg/innerring/processors/netmap/process_peers.go
+++ b/pkg/innerring/processors/netmap/process_peers.go
@@ -3,11 +3,10 @@ package netmap
 import (
 	"encoding/hex"
 
-	"github.com/nspcc-dev/neofs-api-go/v2/netmap/grpc"
+	"github.com/nspcc-dev/neofs-api-go/pkg/netmap"
 	"github.com/nspcc-dev/neofs-node/pkg/innerring/invoke"
 	netmapEvent "github.com/nspcc-dev/neofs-node/pkg/morph/event/netmap"
 	"go.uber.org/zap"
-	"google.golang.org/protobuf/proto"
 )
 
 // Process add peer notification by sanity check of new node
@@ -18,25 +17,22 @@ func (np *Processor) processAddPeer(node []byte) {
 		return
 	}
 
-	// unmarshal grpc (any transport) version of node info from API v2
-	nodeInfo := new(netmap.NodeInfo)
-
-	err := proto.Unmarshal(node, nodeInfo)
-	if err != nil {
+	// unmarshal node info
+	nodeInfo := netmap.NewNodeInfo()
+	if err := nodeInfo.Unmarshal(node); err != nil {
 		// it will be nice to have tx id at event structure to log it
 		np.log.Warn("can't parse network map candidate")
 		return
 	}
 
-	keyString := hex.EncodeToString(nodeInfo.PublicKey)
+	keyString := hex.EncodeToString(nodeInfo.PublicKey())
 
 	exists := np.netmapSnapshot.touch(keyString, np.epochState.EpochCounter())
 	if !exists {
 		np.log.Info("approving network map candidate",
 			zap.String("key", keyString))
 
-		err = invoke.ApprovePeer(np.morphClient, np.netmapContract, node)
-		if err != nil {
+		if err := invoke.ApprovePeer(np.morphClient, np.netmapContract, node); err != nil {
 			np.log.Error("can't invoke netmap.AddPeer", zap.Error(err))
 		}
 	}
@@ -50,10 +46,10 @@ func (np *Processor) processUpdatePeer(ev netmapEvent.UpdatePeer) {
 	}
 
 	// better use unified enum from neofs-api-go/v2/netmap package
-	if ev.Status() != uint32(netmap.NodeInfo_OFFLINE) {
+	if ev.Status() != netmap.NodeStateOffline {
 		np.log.Warn("node proposes unknown state",
 			zap.String("key", hex.EncodeToString(ev.PublicKey().Bytes())),
-			zap.Uint32("status", ev.Status()),
+			zap.Stringer("status", ev.Status()),
 		)
 		return
 	}
diff --git a/pkg/local_object_storage/localstore/methods.go b/pkg/local_object_storage/localstore/methods.go
index db59c41dd1..1c4fdeef21 100644
--- a/pkg/local_object_storage/localstore/methods.go
+++ b/pkg/local_object_storage/localstore/methods.go
@@ -8,11 +8,11 @@ import (
 )
 
 func addressBytes(a *objectSDK.Address) ([]byte, error) {
-	return a.ToV2().StableMarshal(nil)
+	return a.Marshal()
 }
 
 func objectBytes(o *object.Object) ([]byte, error) {
-	return o.ToV2().StableMarshal(nil)
+	return o.Marshal()
 }
 
 func (s *Storage) Put(obj *object.Object) error {
diff --git a/pkg/local_object_storage/metabase/put.go b/pkg/local_object_storage/metabase/put.go
index 11a77c1668..7fde8b0d3b 100644
--- a/pkg/local_object_storage/metabase/put.go
+++ b/pkg/local_object_storage/metabase/put.go
@@ -31,7 +31,7 @@ func (db *DB) Put(obj *object.Object) error {
 				return errors.Wrapf(err, "(%T) could not create primary bucket", db)
 			}
 
-			data, err := obj.ToV2().StableMarshal(nil)
+			data, err := obj.Marshal()
 			if err != nil {
 				return errors.Wrapf(err, "(%T) could not marshal the object", db)
 			}
diff --git a/pkg/morph/client/container/wrapper/container.go b/pkg/morph/client/container/wrapper/container.go
index 2739c43f6c..46f2ee013b 100644
--- a/pkg/morph/client/container/wrapper/container.go
+++ b/pkg/morph/client/container/wrapper/container.go
@@ -5,13 +5,10 @@ import (
 
 	"github.com/nspcc-dev/neofs-api-go/pkg/container"
 	"github.com/nspcc-dev/neofs-api-go/pkg/owner"
-	v2container "github.com/nspcc-dev/neofs-api-go/v2/container"
-	msgContainer "github.com/nspcc-dev/neofs-api-go/v2/container/grpc"
 	v2refs "github.com/nspcc-dev/neofs-api-go/v2/refs"
 	core "github.com/nspcc-dev/neofs-node/pkg/core/container"
 	client "github.com/nspcc-dev/neofs-node/pkg/morph/client/container"
 	"github.com/pkg/errors"
-	"google.golang.org/protobuf/proto"
 )
 
 var (
@@ -33,20 +30,16 @@ func (w *Wrapper) Put(cnr *container.Container, pubKey, signature []byte) (*cont
 	args.SetPublicKey(pubKey)
 	args.SetSignature(signature)
 
-	id := new(container.ID)
+	id := container.NewID()
 
-	if v2 := cnr.ToV2(); v2 == nil {
-		return nil, errUnsupported // use other major version if there any
-	} else {
-		data, err := v2.StableMarshal(nil)
-		if err != nil {
-			return nil, errors.Wrap(err, "can't marshal container")
-		}
-
-		id.SetSHA256(sha256.Sum256(data))
-		args.SetContainer(data)
+	data, err := cnr.Marshal()
+	if err != nil {
+		return nil, errors.Wrap(err, "can't marshal container")
 	}
 
+	id.SetSHA256(sha256.Sum256(data))
+	args.SetContainer(data)
+
 	return id, w.client.Put(args)
 }
 
@@ -81,18 +74,14 @@ func (w *Wrapper) Get(cid *container.ID) (*container.Container, error) {
 		return nil, core.ErrNotFound
 	}
 
-	// convert serialized bytes into GRPC structure
-	grpcMsg := new(msgContainer.Container)
-	err = proto.Unmarshal(rpcAnswer.Container(), grpcMsg)
-	if err != nil {
+	// unmarshal container
+	cnr := container.New()
+	if err := cnr.Unmarshal(rpcAnswer.Container()); err != nil {
 		// use other major version if there any
 		return nil, errors.Wrap(err, "can't unmarshal container")
 	}
 
-	// convert GRPC structure into SDK structure, used in the code
-	v2Cnr := v2container.ContainerFromGRPCMessage(grpcMsg)
-
-	return container.NewContainerFromV2(v2Cnr), nil
+	return cnr, nil
 }
 
 // Delete removes the container from NeoFS system
diff --git a/pkg/morph/client/container/wrapper/eacl.go b/pkg/morph/client/container/wrapper/eacl.go
index d392c45775..d8bad938d6 100644
--- a/pkg/morph/client/container/wrapper/eacl.go
+++ b/pkg/morph/client/container/wrapper/eacl.go
@@ -3,11 +3,8 @@ package wrapper
 import (
 	"github.com/nspcc-dev/neofs-api-go/pkg/acl/eacl"
 	"github.com/nspcc-dev/neofs-api-go/pkg/container"
-	v2ACL "github.com/nspcc-dev/neofs-api-go/v2/acl"
-	msgACL "github.com/nspcc-dev/neofs-api-go/v2/acl/grpc"
 	client "github.com/nspcc-dev/neofs-node/pkg/morph/client/container"
 	"github.com/pkg/errors"
-	"google.golang.org/protobuf/proto"
 )
 
 // GetEACL reads the extended ACL table from NeoFS system
@@ -30,16 +27,13 @@ func (w *Wrapper) GetEACL(cid *container.ID) (*eacl.Table, []byte, error) {
 		return nil, nil, err
 	}
 
-	grpcMsg := new(msgACL.EACLTable)
-	err = proto.Unmarshal(rpcAnswer.EACL(), grpcMsg)
-	if err != nil {
+	table := eacl.NewTable()
+	if err = table.Unmarshal(rpcAnswer.EACL()); err != nil {
 		// use other major version if there any
 		return nil, nil, err
 	}
 
-	v2table := v2ACL.TableFromGRPCMessage(grpcMsg)
-
-	return eacl.NewTableFromV2(v2table), rpcAnswer.Signature(), nil
+	return table, rpcAnswer.Signature(), nil
 }
 
 // PutEACL saves the extended ACL table in NeoFS system
@@ -54,16 +48,12 @@ func (w *Wrapper) PutEACL(table *eacl.Table, signature []byte) error {
 	args := client.SetEACLArgs{}
 	args.SetSignature(signature)
 
-	if v2 := table.ToV2(); v2 == nil {
-		return errUnsupported // use other major version if there any
-	} else {
-		data, err := v2.StableMarshal(nil)
-		if err != nil {
-			return errors.Wrap(err, "can't marshal eacl table")
-		}
-
-		args.SetEACL(data)
+	data, err := table.Marshal()
+	if err != nil {
+		return errors.Wrap(err, "can't marshal eacl table")
 	}
 
+	args.SetEACL(data)
+
 	return w.client.SetEACL(args)
 }
diff --git a/pkg/morph/client/netmap/client.go b/pkg/morph/client/netmap/client.go
index 5440827490..dd89985f68 100644
--- a/pkg/morph/client/netmap/client.go
+++ b/pkg/morph/client/netmap/client.go
@@ -3,7 +3,7 @@ package netmap
 import (
 	"errors"
 
-	"github.com/nspcc-dev/neofs-api-go/v2/netmap"
+	"github.com/nspcc-dev/neofs-api-go/pkg/netmap"
 	"github.com/nspcc-dev/neofs-node/pkg/morph/client"
 )
 
diff --git a/pkg/morph/client/netmap/wrapper/add_peer.go b/pkg/morph/client/netmap/wrapper/add_peer.go
index 14e7d7272c..cc2470850f 100644
--- a/pkg/morph/client/netmap/wrapper/add_peer.go
+++ b/pkg/morph/client/netmap/wrapper/add_peer.go
@@ -12,7 +12,7 @@ func (w *Wrapper) AddPeer(nodeInfo *netmap.NodeInfo) error {
 		return errors.New("nil node info")
 	}
 
-	rawNodeInfo, err := nodeInfo.StableMarshal(nil)
+	rawNodeInfo, err := nodeInfo.Marshal()
 	if err != nil {
 		return err
 	}
diff --git a/pkg/morph/client/netmap/wrapper/netmap.go b/pkg/morph/client/netmap/wrapper/netmap.go
index 7ff1afb21b..9d3a06a6a5 100644
--- a/pkg/morph/client/netmap/wrapper/netmap.go
+++ b/pkg/morph/client/netmap/wrapper/netmap.go
@@ -2,11 +2,8 @@ package wrapper
 
 import (
 	"github.com/nspcc-dev/neofs-api-go/pkg/netmap"
-	v2netmap "github.com/nspcc-dev/neofs-api-go/v2/netmap"
-	grpcNetmap "github.com/nspcc-dev/neofs-api-go/v2/netmap/grpc"
 	client "github.com/nspcc-dev/neofs-node/pkg/morph/client/netmap"
 	"github.com/pkg/errors"
-	"google.golang.org/protobuf/proto"
 )
 
 // GetNetMap receives information list about storage nodes
@@ -26,16 +23,12 @@ func (w Wrapper) GetNetMap(diff uint64) (*netmap.Netmap, error) {
 	infos := make([]netmap.NodeInfo, 0, len(rawPeers))
 
 	for _, peer := range rawPeers {
-		grpcNodeInfo := new(grpcNetmap.NodeInfo) // transport representation of struct
-		err = proto.Unmarshal(peer, grpcNodeInfo)
-		if err != nil {
-			// consider unmarshalling into different major versions
-			// of NodeInfo structure, if there any
+		nodeInfo := netmap.NewNodeInfo()
+		if err := nodeInfo.Unmarshal(peer); err != nil {
 			return nil, errors.Wrap(err, "can't unmarshal peer info")
 		}
 
-		v2 := v2netmap.NodeInfoFromGRPCMessage(grpcNodeInfo)
-		infos = append(infos, *netmap.NewNodeInfoFromV2(v2))
+		infos = append(infos, *nodeInfo)
 	}
 
 	nodes := netmap.NodesFromInfo(infos)
diff --git a/pkg/morph/event/netmap/update_peer.go b/pkg/morph/event/netmap/update_peer.go
index 236dc98b07..16a4469821 100644
--- a/pkg/morph/event/netmap/update_peer.go
+++ b/pkg/morph/event/netmap/update_peer.go
@@ -5,6 +5,8 @@ import (
 
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
 	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
+	"github.com/nspcc-dev/neofs-api-go/pkg/netmap"
+	v2netmap "github.com/nspcc-dev/neofs-api-go/v2/netmap"
 	"github.com/nspcc-dev/neofs-node/pkg/morph/client"
 	"github.com/nspcc-dev/neofs-node/pkg/morph/event"
 	"github.com/pkg/errors"
@@ -12,13 +14,13 @@ import (
 
 type UpdatePeer struct {
 	publicKey *keys.PublicKey
-	status    uint32
+	status    netmap.NodeState
 }
 
 // MorphEvent implements Neo:Morph Event interface.
 func (UpdatePeer) MorphEvent() {}
 
-func (s UpdatePeer) Status() uint32 {
+func (s UpdatePeer) Status() netmap.NodeState {
 	return s.status
 }
 
@@ -53,7 +55,7 @@ func ParseUpdatePeer(prms []stackitem.Item) (event.Event, error) {
 		return nil, errors.Wrap(err, "could not get node status")
 	}
 
-	ev.status = uint32(st)
+	ev.status = netmap.NodeStateFromV2(v2netmap.NodeState(st))
 
 	return ev, nil
 }
diff --git a/pkg/morph/event/netmap/update_peer_test.go b/pkg/morph/event/netmap/update_peer_test.go
index baaf5c917f..abb5947dfe 100644
--- a/pkg/morph/event/netmap/update_peer_test.go
+++ b/pkg/morph/event/netmap/update_peer_test.go
@@ -7,6 +7,7 @@ import (
 
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
 	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
+	"github.com/nspcc-dev/neofs-api-go/pkg/netmap"
 	crypto "github.com/nspcc-dev/neofs-crypto"
 	"github.com/nspcc-dev/neofs-crypto/test"
 	"github.com/nspcc-dev/neofs-node/pkg/morph/event"
@@ -15,8 +16,8 @@ import (
 
 func TestParseUpdatePeer(t *testing.T) {
 	var (
-		publicKey       = &test.DecodeKey(-1).PublicKey
-		state     int64 = 1
+		publicKey = &test.DecodeKey(-1).PublicKey
+		state     = netmap.NodeStateOffline
 	)
 
 	t.Run("wrong number of parameters", func(t *testing.T) {
@@ -48,7 +49,7 @@ func TestParseUpdatePeer(t *testing.T) {
 	t.Run("correct behavior", func(t *testing.T) {
 		ev, err := ParseUpdatePeer([]stackitem.Item{
 			stackitem.NewByteArray(crypto.MarshalPublicKey(publicKey)),
-			stackitem.NewBigInteger(new(big.Int).SetInt64(state)),
+			stackitem.NewBigInteger(new(big.Int).SetInt64(int64(state.ToV2()))),
 		})
 		require.NoError(t, err)
 
@@ -57,7 +58,7 @@ func TestParseUpdatePeer(t *testing.T) {
 
 		require.Equal(t, UpdatePeer{
 			publicKey: expectedKey,
-			status:    uint32(state),
+			status:    state,
 		}, ev)
 	})
 }
diff --git a/pkg/services/session/storage/executor.go b/pkg/services/session/storage/executor.go
index 435070dfd2..68b663dcd3 100644
--- a/pkg/services/session/storage/executor.go
+++ b/pkg/services/session/storage/executor.go
@@ -8,13 +8,14 @@ import (
 
 	"github.com/google/uuid"
 	"github.com/mr-tron/base58"
+	"github.com/nspcc-dev/neofs-api-go/pkg/owner"
 	"github.com/nspcc-dev/neofs-api-go/v2/session"
 	crypto "github.com/nspcc-dev/neofs-crypto"
 	"github.com/pkg/errors"
 )
 
 func (s *TokenStore) Create(ctx context.Context, body *session.CreateRequestBody) (*session.CreateResponseBody, error) {
-	ownerBytes, err := body.GetOwnerID().StableMarshal(nil)
+	ownerBytes, err := owner.NewIDFromV2(body.GetOwnerID()).Marshal()
 	if err != nil {
 		panic(err)
 	}
diff --git a/pkg/services/session/storage/storage.go b/pkg/services/session/storage/storage.go
index f0390bd47d..e480b7b4f0 100644
--- a/pkg/services/session/storage/storage.go
+++ b/pkg/services/session/storage/storage.go
@@ -35,7 +35,7 @@ func New() *TokenStore {
 //
 // Returns nil is there is no element in storage.
 func (s *TokenStore) Get(ownerID *owner.ID, tokenID []byte) *PrivateToken {
-	ownerBytes, err := ownerID.ToV2().StableMarshal(nil)
+	ownerBytes, err := ownerID.Marshal()
 	if err != nil {
 		panic(err)
 	}
diff --git a/pkg/util/attributes/parser.go b/pkg/util/attributes/parser.go
index 04aecaf0da..777597969c 100644
--- a/pkg/util/attributes/parser.go
+++ b/pkg/util/attributes/parser.go
@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"strings"
 
-	"github.com/nspcc-dev/neofs-api-go/v2/netmap"
+	"github.com/nspcc-dev/neofs-api-go/pkg/netmap"
 )
 
 const (
@@ -21,13 +21,13 @@ var (
 
 // ParseV2Attributes parses strings like "K1:V1/K2:V2/K3:V3" into netmap
 // attributes.
-func ParseV2Attributes(attrs []string, excl []string) ([]*netmap.Attribute, error) {
+func ParseV2Attributes(attrs []string, excl []string) ([]*netmap.NodeAttribute, error) {
 	restricted := make(map[string]struct{}, len(excl))
 	for i := range excl {
 		restricted[excl[i]] = struct{}{}
 	}
 
-	cache := make(map[string]*netmap.Attribute, len(attrs))
+	cache := make(map[string]*netmap.NodeAttribute, len(attrs))
 
 	for i := range attrs {
 		line := strings.Trim(attrs[i], pairSeparator)
@@ -47,7 +47,7 @@ func ParseV2Attributes(attrs []string, excl []string) ([]*netmap.Attribute, erro
 			key := pair[0]
 			value := pair[1]
 
-			if at, ok := cache[key]; ok && at.GetValue() != value {
+			if at, ok := cache[key]; ok && at.Value() != value {
 				return nil, errNonUniqueBucket
 			}
 
@@ -55,12 +55,12 @@ func ParseV2Attributes(attrs []string, excl []string) ([]*netmap.Attribute, erro
 				return nil, errUnexpectedKey
 			}
 
-			attribute := new(netmap.Attribute)
+			attribute := netmap.NewNodeAttribute()
 			attribute.SetKey(key)
 			attribute.SetValue(value)
 
 			if parentKey != "" {
-				attribute.SetParents([]string{parentKey})
+				attribute.SetParentKeys(parentKey)
 			}
 
 			parentKey = key
@@ -68,7 +68,7 @@ func ParseV2Attributes(attrs []string, excl []string) ([]*netmap.Attribute, erro
 		}
 	}
 
-	result := make([]*netmap.Attribute, 0, len(cache))
+	result := make([]*netmap.NodeAttribute, 0, len(cache))
 	for _, v := range cache {
 		result = append(result, v)
 	}