[#86] status: Regenerate common status

* INVALID_ARGUMENT is a new common status constant.

Signed-off-by: Airat Arifullin <a.arifullin@yadro.com>

.forgejo/workflows/dco.yml

@@ -16,6 +16,6 @@ jobs:
           go-version: '1.21'
 
       - name: Run commit format checker
-        uses: https://git.frostfs.info/TrueCloudLab/dco-go@v2
+        uses: https://git.frostfs.info/TrueCloudLab/dco-go@v3
         with:
           from: 'origin/${{ github.event.pull_request.base.ref }}'

.gitlint

@@ -1,10 +0,0 @@
-[general]
-fail-without-commits=true
-contrib=CC1
-
-[title-match-regex]
-regex=^\[\#[0-9Xx]+\]\s
-
-[ignore-by-title]
-regex=^Release(.*)
-ignore=title-match-regex

.pre-commit-config.yaml

@@ -18,13 +18,25 @@ repos:
     - id: end-of-file-fixer
       exclude: ".key$"
 
+  - repo: local
+    hooks:
+       - id: gofumpt
+         name: gofumpt
+         entry: make fumpt
+         pass_filenames: false
+         types: [go]
+         language: system
+
+  - repo: local
+    hooks:
+       - id: go-unit-tests
+         name: go unit tests
+         entry: make test GOFLAGS=''
+         pass_filenames: false
+         types: [go]
+         language: system
+
   - repo: https://github.com/golangci/golangci-lint
-    rev: v1.51.2
+    rev: v1.56.2
     hooks:
     - id: golangci-lint
-
-  - repo: https://github.com/jorisroovers/gitlint
-    rev:  v0.18.0
-    hooks:
-      - id: gitlint
-        stages: [commit-msg]

Makefile

@@ -3,40 +3,35 @@ SHELL = bash
 
 VERSION ?= $(shell git describe --tags --match "v*" --abbrev=8 --dirty --always)
 
-.PHONY: dep fmts fmt imports protoc test lint version help
+.PHONY: dep fmts fumpt imports protoc test lint version help
 
 # Pull go dependencies
 dep:
 	@printf "⇒ Tidy requirements : "
 	CGO_ENABLED=0 \
-	GO111MODULE=on \
 	go mod tidy -v && echo OK
 	@printf "⇒ Download requirements: "
 	CGO_ENABLED=0 \
-	GO111MODULE=on \
 	go mod download && echo OK
 	@printf "⇒ Install test requirements: "
 	CGO_ENABLED=0 \
-	GO111MODULE=on \
 	go test ./... && echo OK
 
 # Run all code formatters
-fmts: fmt imports
+fmts: fumpt imports
-
-# Reformat code
-fmt:
-	@echo "⇒ Processing gofmt check"
-	@for f in `find . -type f -name '*.go' -not -path './vendor/*' -not -name '*.pb.go' -prune`; do \
-		GO111MODULE=on gofmt -s -w $$f; \
-	done
 
 # Reformat imports
 imports:
 	@echo "⇒ Processing goimports check"
 	@for f in `find . -type f -name '*.go' -not -path './vendor/*' -not -name '*.pb.go' -prune`; do \
-		GO111MODULE=on goimports -w $$f; \
+		goimports -w $$f; \
 	done
 
+# Run gofumpt
+fumpt:
+	@echo "⇒ Processing gofumpt check"
+	@gofumpt -l -w .
+
 # Regenerate code for proto files
 protoc:
 	@GOPRIVATE=github.com/TrueCloudLab go mod vendor
@@ -54,9 +49,10 @@ protoc:
 	rm -rf vendor
 
 # Run Unit Test with go test
+test: GOFLAGS ?= "-count=1"
 test:
 	@echo "⇒ Running go test"
-	@GO111MODULE=on go test ./...
+	@GOFLAGS="$(GOFLAGS)" go test ./...
 
 # Run linters
 lint:

acl/convert.go

@@ -2,6 +2,8 @@ package acl
 
 import (
 	acl "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/acl/grpc"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/ape"
+	apeGRPC "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/ape/grpc"
 	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/refs"
 	refsGRPC "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/refs/grpc"
 	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/grpc"
@@ -164,7 +166,7 @@ func (f *HeaderFilter) ToGRPCMessage() grpc.Message {
 
 		m.SetKey(f.key)
 		m.SetValue(f.value)
-		m.SetHeader(HeaderTypeToGRPCField(f.hdrType))
+		m.SetHeaderType(HeaderTypeToGRPCField(f.hdrType))
 		m.SetMatchType(MatchTypeToGRPCField(f.matchType))
 	}
 
@@ -418,6 +420,54 @@ func (l *TokenLifetime) FromGRPCMessage(m grpc.Message) error {
 	return nil
 }
 
+func (c *APEOverride) ToGRPCMessage() grpc.Message {
+	var m *acl.BearerToken_Body_APEOverride
+
+	if c != nil {
+		m = new(acl.BearerToken_Body_APEOverride)
+
+		m.SetTarget(c.target.ToGRPCMessage().(*apeGRPC.ChainTarget))
+
+		if len(c.chains) > 0 {
+			apeChains := make([]*apeGRPC.Chain, len(c.chains))
+			for i := range c.chains {
+				apeChains[i] = c.chains[i].ToGRPCMessage().(*apeGRPC.Chain)
+			}
+			m.SetChains(apeChains)
+		}
+	}
+
+	return m
+}
+
+func (c *APEOverride) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*acl.BearerToken_Body_APEOverride)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	if targetGRPC := v.GetTarget(); targetGRPC != nil {
+		if c.target == nil {
+			c.target = new(ape.ChainTarget)
+		}
+		if err := c.target.FromGRPCMessage(v.GetTarget()); err != nil {
+			return err
+		}
+	}
+
+	if apeChains := v.GetChains(); len(apeChains) > 0 {
+		c.chains = make([]*ape.Chain, len(apeChains))
+		for i := range apeChains {
+			c.chains[i] = new(ape.Chain)
+			if err := c.chains[i].FromGRPCMessage(apeChains[i]); err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}
+
 func (bt *BearerTokenBody) ToGRPCMessage() grpc.Message {
 	var m *acl.BearerToken_Body
 
@@ -427,7 +477,8 @@ func (bt *BearerTokenBody) ToGRPCMessage() grpc.Message {
 		m.SetOwnerId(bt.ownerID.ToGRPCMessage().(*refsGRPC.OwnerID))
 		m.SetLifetime(bt.lifetime.ToGRPCMessage().(*acl.BearerToken_Body_TokenLifetime))
 		m.SetEaclTable(bt.eacl.ToGRPCMessage().(*acl.EACLTable))
-		m.SetImpersonate(bt.impersonate)
+		m.SetAllowImpersonate(bt.impersonate)
+		m.SetAPEOverride(bt.apeOverride.ToGRPCMessage().(*acl.BearerToken_Body_APEOverride))
 	}
 
 	return m
@@ -477,7 +528,19 @@ func (bt *BearerTokenBody) FromGRPCMessage(m grpc.Message) error {
 			bt.eacl = new(Table)
 		}
 
-		err = bt.eacl.FromGRPCMessage(eacl)
+		if err = bt.eacl.FromGRPCMessage(eacl); err != nil {
+			return err
+		}
+	}
+
+	if apeOverrideGRPC := v.GetApeOverride(); apeOverrideGRPC != nil {
+		if bt.apeOverride == nil {
+			bt.apeOverride = new(APEOverride)
+		}
+		err = bt.apeOverride.FromGRPCMessage(apeOverrideGRPC)
+		if err != nil {
+			return err
+		}
 	}
 
 	bt.impersonate = v.GetAllowImpersonate()

acl/grpc/types.go

@@ -1,6 +1,7 @@
 package acl
 
 import (
+	ape "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/ape/grpc"
 	refs "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/refs/grpc"
 )
 
@@ -39,8 +40,8 @@ func (m *EACLRecord) SetTargets(v []*EACLRecord_Target) {
 	m.Targets = v
 }
 
-// SetHeader sets header type of the eACL filter.
+// SetHeaderType sets header type of the eACL filter.
-func (m *EACLRecord_Filter) SetHeader(v HeaderType) {
+func (m *EACLRecord_Filter) SetHeaderType(v HeaderType) {
 	m.HeaderType = v
 }
 
@@ -74,6 +75,18 @@ func (m *BearerToken_Body) SetEaclTable(v *EACLTable) {
 	m.EaclTable = v
 }
 
+func (m *BearerToken_Body) SetAPEOverride(v *BearerToken_Body_APEOverride) {
+	m.ApeOverride = v
+}
+
+func (m *BearerToken_Body_APEOverride) SetChains(v []*ape.Chain) {
+	m.Chains = v
+}
+
+func (m *BearerToken_Body_APEOverride) SetTarget(v *ape.ChainTarget) {
+	m.Target = v
+}
+
 // SetOwnerId sets identifier of the bearer token owner.
 func (m *BearerToken_Body) SetOwnerId(v *refs.OwnerID) {
 	m.OwnerId = v
@@ -84,8 +97,8 @@ func (m *BearerToken_Body) SetLifetime(v *BearerToken_Body_TokenLifetime) {
 	m.Lifetime = v
 }
 
-// SetImpersonate allows impersonate.
+// SetAllowImpersonate allows impersonate.
-func (m *BearerToken_Body) SetImpersonate(v bool) {
+func (m *BearerToken_Body) SetAllowImpersonate(v bool) {
 	m.AllowImpersonate = v
 }
 

acl/json.go

@@ -21,6 +21,14 @@ func (t *Target) UnmarshalJSON(data []byte) error {
 	return message.UnmarshalJSON(t, data, new(acl.EACLRecord_Target))
 }
 
+func (a *APEOverride) MarshalJSON() ([]byte, error) {
+	return message.MarshalJSON(a)
+}
+
+func (a *APEOverride) UnmarshalJSON(data []byte) error {
+	return message.UnmarshalJSON(a, data, new(acl.BearerToken_Body_APEOverride))
+}
+
 func (r *Record) MarshalJSON() ([]byte, error) {
 	return message.MarshalJSON(r)
 }

acl/marshal.go

@@ -28,10 +28,14 @@ const (
 	lifetimeNotValidBeforeField = 2
 	lifetimeIssuedAtField       = 3
 
-	bearerTokenBodyACLField      = 1
+	tokenAPEChainsTargetField = 1
-	bearerTokenBodyOwnerField    = 2
+	tokenAPEChainsChainsField = 2
-	bearerTokenBodyLifetimeField = 3
+
-	bearerTokenBodyImpersonate   = 4
+	bearerTokenBodyACLField        = 1
+	bearerTokenBodyOwnerField      = 2
+	bearerTokenBodyLifetimeField   = 3
+	bearerTokenBodyImpersonate     = 4
+	bearerTokenTokenAPEChainsField = 5
 
 	bearerTokenBodyField      = 1
 	bearerTokenSignatureField = 2
@@ -239,6 +243,42 @@ func (l *TokenLifetime) Unmarshal(data []byte) error {
 	return message.Unmarshal(l, data, new(acl.BearerToken_Body_TokenLifetime))
 }
 
+func (c *APEOverride) StableMarshal(buf []byte) []byte {
+	if c == nil {
+		return []byte{}
+	}
+
+	if buf == nil {
+		buf = make([]byte, c.StableSize())
+	}
+
+	var offset int
+
+	offset += protoutil.NestedStructureMarshal(tokenAPEChainsTargetField, buf[offset:], c.target)
+	for i := range c.chains {
+		offset += protoutil.NestedStructureMarshal(tokenAPEChainsChainsField, buf[offset:], c.chains[i])
+	}
+
+	return buf
+}
+
+func (c *APEOverride) StableSize() (size int) {
+	if c == nil {
+		return 0
+	}
+
+	size += protoutil.NestedStructureSize(tokenAPEChainsTargetField, c.target)
+	for i := range c.chains {
+		size += protoutil.NestedStructureSize(tokenAPEChainsChainsField, c.chains[i])
+	}
+
+	return size
+}
+
+func (c *APEOverride) Unmarshal(data []byte) error {
+	return message.Unmarshal(c, data, new(acl.BearerToken_Body_APEOverride))
+}
+
 func (bt *BearerTokenBody) StableMarshal(buf []byte) []byte {
 	if bt == nil {
 		return []byte{}
@@ -253,7 +293,8 @@ func (bt *BearerTokenBody) StableMarshal(buf []byte) []byte {
 	offset += protoutil.NestedStructureMarshal(bearerTokenBodyACLField, buf[offset:], bt.eacl)
 	offset += protoutil.NestedStructureMarshal(bearerTokenBodyOwnerField, buf[offset:], bt.ownerID)
 	offset += protoutil.NestedStructureMarshal(bearerTokenBodyLifetimeField, buf[offset:], bt.lifetime)
-	protoutil.BoolMarshal(bearerTokenBodyImpersonate, buf[offset:], bt.impersonate)
+	offset += protoutil.BoolMarshal(bearerTokenBodyImpersonate, buf[offset:], bt.impersonate)
+	protoutil.NestedStructureMarshal(bearerTokenTokenAPEChainsField, buf[offset:], bt.apeOverride)
 
 	return buf
 }
@@ -267,6 +308,7 @@ func (bt *BearerTokenBody) StableSize() (size int) {
 	size += protoutil.NestedStructureSize(bearerTokenBodyOwnerField, bt.ownerID)
 	size += protoutil.NestedStructureSize(bearerTokenBodyLifetimeField, bt.lifetime)
 	size += protoutil.BoolSize(bearerTokenBodyImpersonate, bt.impersonate)
+	size += protoutil.NestedStructureSize(bearerTokenTokenAPEChainsField, bt.apeOverride)
 
 	return size
 }

acl/test/generate.go

@@ -2,6 +2,7 @@ package acltest
 
 import (
 	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/acl"
+	apetest "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/ape/test"
 	accountingtest "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/refs/test"
 )
 
@@ -22,8 +23,20 @@ func GenerateBearerTokenBody(empty bool) *acl.BearerTokenBody {
 
 	if !empty {
 		m.SetOwnerID(accountingtest.GenerateOwnerID(false))
-		m.SetEACL(GenerateTable(false))
 		m.SetLifetime(GenerateTokenLifetime(false))
+		m.SetAPEOverride(GenerateAPEOverride(empty))
+	}
+
+	return m
+}
+
+func GenerateAPEOverride(empty bool) *acl.APEOverride {
+	var m *acl.APEOverride
+
+	if !empty {
+		m = new(acl.APEOverride)
+		m.SetTarget(apetest.GenerateChainTarget(empty))
+		m.SetChains(apetest.GenerateRawChains(false, 3))
 	}
 
 	return m

acl/types.go

@@ -1,6 +1,9 @@
 package acl
 
-import "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/refs"
+import (
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/ape"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/refs"
+)
 
 // HeaderFilter is a unified structure of FilterInfo
 // message from proto definition.
@@ -46,6 +49,12 @@ type TokenLifetime struct {
 	exp, nbf, iat uint64
 }
 
+type APEOverride struct {
+	target *ape.ChainTarget
+
+	chains []*ape.Chain
+}
+
 type BearerTokenBody struct {
 	eacl *Table
 
@@ -53,6 +62,8 @@ type BearerTokenBody struct {
 
 	lifetime *TokenLifetime
 
+	apeOverride *APEOverride
+
 	impersonate bool
 }
 
@@ -318,6 +329,34 @@ func (bt *BearerTokenBody) SetEACL(v *Table) {
 	bt.eacl = v
 }
 
+func (t *APEOverride) GetTarget() *ape.ChainTarget {
+	return t.target
+}
+
+func (t *APEOverride) GetChains() []*ape.Chain {
+	return t.chains
+}
+
+func (t *APEOverride) SetTarget(v *ape.ChainTarget) {
+	t.target = v
+}
+
+func (t *APEOverride) SetChains(v []*ape.Chain) {
+	t.chains = v
+}
+
+func (bt *BearerTokenBody) GetAPEOverride() *APEOverride {
+	if bt != nil {
+		return bt.apeOverride
+	}
+
+	return nil
+}
+
+func (bt *BearerTokenBody) SetAPEOverride(v *APEOverride) {
+	bt.apeOverride = v
+}
+
 func (bt *BearerTokenBody) GetOwnerID() *refs.OwnerID {
 	if bt != nil {
 		return bt.ownerID

ape/convert.go

@@ -0,0 +1,132 @@
+package ape
+
+import (
+	"fmt"
+
+	ape "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/ape/grpc"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/grpc"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/message"
+)
+
+func TargetTypeToGRPCField(typ TargetType) ape.TargetType {
+	switch typ {
+	case TargetTypeNamespace:
+		return ape.TargetType_NAMESPACE
+	case TargetTypeContainer:
+		return ape.TargetType_CONTAINER
+	case TargetTypeUser:
+		return ape.TargetType_USER
+	case TargetTypeGroup:
+		return ape.TargetType_GROUP
+	default:
+		return ape.TargetType_UNDEFINED
+	}
+}
+
+func TargetTypeFromGRPCField(typ ape.TargetType) TargetType {
+	switch typ {
+	case ape.TargetType_NAMESPACE:
+		return TargetTypeNamespace
+	case ape.TargetType_CONTAINER:
+		return TargetTypeContainer
+	case ape.TargetType_USER:
+		return TargetTypeUser
+	case ape.TargetType_GROUP:
+		return TargetTypeGroup
+	default:
+		return TargetTypeUndefined
+	}
+}
+
+func TargetTypeToGRPC(typ TargetType) ape.TargetType {
+	return ape.TargetType(typ)
+}
+
+func TargetTypeFromGRPC(typ ape.TargetType) TargetType {
+	return TargetType(typ)
+}
+
+func (v2 *ChainTarget) ToGRPCMessage() grpc.Message {
+	var mgrpc *ape.ChainTarget
+
+	if v2 != nil {
+		mgrpc = new(ape.ChainTarget)
+
+		mgrpc.SetType(TargetTypeToGRPC(v2.GetTargetType()))
+		mgrpc.SetName(v2.GetName())
+	}
+
+	return mgrpc
+}
+
+func (v2 *ChainTarget) FromGRPCMessage(m grpc.Message) error {
+	mgrpc, ok := m.(*ape.ChainTarget)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, mgrpc)
+	}
+
+	v2.SetTargetType(TargetTypeFromGRPC(mgrpc.GetType()))
+	v2.SetName(mgrpc.GetName())
+
+	return nil
+}
+
+func (v2 *ChainRaw) ToGRPCMessage() grpc.Message {
+	var mgrpc *ape.Chain_Raw
+
+	if v2 != nil {
+		mgrpc = new(ape.Chain_Raw)
+
+		mgrpc.SetRaw(v2.GetRaw())
+	}
+
+	return mgrpc
+}
+
+func (v2 *ChainRaw) FromGRPCMessage(m grpc.Message) error {
+	mgrpc, ok := m.(*ape.Chain_Raw)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, mgrpc)
+	}
+
+	v2.SetRaw(mgrpc.GetRaw())
+
+	return nil
+}
+
+func (v2 *Chain) ToGRPCMessage() grpc.Message {
+	var mgrpc *ape.Chain
+
+	if v2 != nil {
+		mgrpc = new(ape.Chain)
+
+		switch chainKind := v2.GetKind().(type) {
+		default:
+			panic(fmt.Sprintf("unsupported chain kind: %T", chainKind))
+		case *ChainRaw:
+			mgrpc.SetKind(chainKind.ToGRPCMessage().(*ape.Chain_Raw))
+		}
+	}
+
+	return mgrpc
+}
+
+func (v2 *Chain) FromGRPCMessage(m grpc.Message) error {
+	mgrpc, ok := m.(*ape.Chain)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, mgrpc)
+	}
+
+	switch chainKind := mgrpc.GetKind().(type) {
+	default:
+		return fmt.Errorf("unsupported chain kind: %T", chainKind)
+	case *ape.Chain_Raw:
+		chainRaw := new(ChainRaw)
+		if err := chainRaw.FromGRPCMessage(chainKind); err != nil {
+			return err
+		}
+		v2.SetKind(chainRaw)
+	}
+
+	return nil
+}

ape/grpc/types.go

@@ -0,0 +1,21 @@
+package ape
+
+func (t *ChainTarget) SetType(typ TargetType) {
+	t.Type = typ
+}
+
+func (t *ChainTarget) SetName(name string) {
+	t.Name = name
+}
+
+func (c *Chain) SetKind(kind isChain_Kind) {
+	c.Kind = kind
+}
+
+func (cr *Chain_Raw) SetRaw(raw []byte) {
+	cr.Raw = raw
+}
+
+func (cr *Chain_Raw) GetRaw() []byte {
+	return cr.Raw
+}

ape/json.go

@@ -0,0 +1,14 @@
+package ape
+
+import (
+	ape "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/ape/grpc"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/message"
+)
+
+func (t *ChainTarget) MarshalJSON() ([]byte, error) {
+	return message.MarshalJSON(t)
+}
+
+func (t *ChainTarget) UnmarshalJSON(data []byte) error {
+	return message.UnmarshalJSON(t, data, new(ape.ChainTarget))
+}

ape/marshal.go

@@ -0,0 +1,92 @@
+package ape
+
+import (
+	"fmt"
+
+	ape "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/ape/grpc"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/message"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/util/proto"
+)
+
+const (
+	chainTargetTargetTypeField = 1
+	chainTargetNameField       = 2
+
+	chainRawField = 1
+)
+
+func (t *ChainTarget) StableSize() (size int) {
+	if t == nil {
+		return 0
+	}
+
+	size += proto.EnumSize(chainTargetTargetTypeField, int32(t.targeType))
+	size += proto.StringSize(chainTargetNameField, t.name)
+
+	return size
+}
+
+func (t *ChainTarget) StableMarshal(buf []byte) []byte {
+	if t == nil {
+		return []byte{}
+	}
+
+	if buf == nil {
+		buf = make([]byte, t.StableSize())
+	}
+
+	var offset int
+
+	offset += proto.EnumMarshal(chainTargetTargetTypeField, buf[offset:], int32(t.targeType))
+	proto.StringMarshal(chainTargetNameField, buf[offset:], t.name)
+
+	return buf
+}
+
+func (t *ChainTarget) Unmarshal(data []byte) error {
+	return message.Unmarshal(t, data, new(ape.ChainTarget))
+}
+
+func (c *Chain) StableSize() (size int) {
+	if c == nil {
+		return 0
+	}
+
+	switch v := c.GetKind().(type) {
+	case *ChainRaw:
+		if v != nil {
+			size += proto.BytesSize(chainRawField, v.GetRaw())
+		}
+	default:
+		panic(fmt.Sprintf("unsupported chain kind: %T", v))
+	}
+
+	return size
+}
+
+func (c *Chain) StableMarshal(buf []byte) []byte {
+	if c == nil {
+		return []byte{}
+	}
+
+	if buf == nil {
+		buf = make([]byte, c.StableSize())
+	}
+
+	var offset int
+
+	switch v := c.GetKind().(type) {
+	case *ChainRaw:
+		if v != nil {
+			proto.BytesMarshal(chainRawField, buf[offset:], v.GetRaw())
+		}
+	default:
+		panic(fmt.Sprintf("unsupported chain kind: %T", v))
+	}
+
+	return buf
+}
+
+func (c *Chain) Unmarshal(data []byte) error {
+	return message.Unmarshal(c, data, new(ape.Chain))
+}

ape/message_test.go

@@ -1,15 +1,15 @@
-package audit_test
+package ape_test
 
 import (
 	"testing"
 
-	audittest "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/audit/test"
+	apetest "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/ape/test"
 	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/message"
 	messagetest "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/message/test"
 )
 
 func TestMessageConvert(t *testing.T) {
 	messagetest.TestRPCMessage(t,
-		func(empty bool) message.Message { return audittest.GenerateDataAuditResult(empty) },
+		func(empty bool) message.Message { return apetest.GenerateChainTarget(empty) },
 	)
 }

ape/string.go

@@ -0,0 +1,18 @@
+package ape
+
+import (
+	apegrpc "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/ape/grpc"
+)
+
+func (tt TargetType) String() string {
+	return TargetTypeToGRPCField(tt).String()
+}
+
+func (tt *TargetType) FromString(s string) bool {
+	i, ok := apegrpc.TargetType_value[s]
+	if ok {
+		*tt = TargetType(i)
+	}
+
+	return ok
+}

ape/test/generate.go

@@ -0,0 +1,71 @@
+package test
+
+import (
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/ape"
+)
+
+func GenerateRawChains(empty bool, n int) []*ape.Chain {
+	if empty {
+		return []*ape.Chain{}
+	}
+
+	res := make([]*ape.Chain, n)
+	for i := range res {
+		res[i] = GenerateRawChain(empty)
+	}
+	return res
+}
+
+func GenerateRawChain(empty bool) *ape.Chain {
+	chRaw := new(ape.ChainRaw)
+
+	if empty {
+		chRaw.SetRaw([]byte("{}"))
+	} else {
+		chRaw.SetRaw([]byte(`{
+			"ID": "",
+			"Rules": [
+			  {
+				"Status": "Allow",
+				"Actions": {
+				  "Inverted": false,
+				  "Names": [
+					"GetObject"
+				  ]
+				},
+				"Resources": {
+				  "Inverted": false,
+				  "Names": [
+					"native:object/*"
+				  ]
+				},
+				"Any": false,
+				"Condition": [
+				  {
+					"Op": "StringEquals",
+					"Object": "Resource",
+					"Key": "Department",
+					"Value": "HR"
+				  }
+				]
+			  }
+			],
+			"MatchType": "DenyPriority"
+			}`))
+	}
+
+	ch := new(ape.Chain)
+	ch.SetKind(chRaw)
+	return ch
+}
+
+func GenerateChainTarget(empty bool) *ape.ChainTarget {
+	m := new(ape.ChainTarget)
+
+	if !empty {
+		m.SetTargetType(ape.TargetTypeContainer)
+		m.SetName("BzQw5HH3feoxFDD5tCT87Y1726qzgLfxEE7wgtoRzB3R")
+	}
+
+	return m
+}

ape/types.go

@@ -0,0 +1,71 @@
+package ape
+
+type TargetType uint32
+
+const (
+	TargetTypeUndefined TargetType = iota
+	TargetTypeNamespace
+	TargetTypeContainer
+	TargetTypeUser
+	TargetTypeGroup
+)
+
+type ChainTarget struct {
+	targeType TargetType
+
+	name string
+}
+
+func (ct *ChainTarget) SetTargetType(targeType TargetType) {
+	ct.targeType = targeType
+}
+
+func (ct *ChainTarget) SetName(name string) {
+	ct.name = name
+}
+
+func (ct *ChainTarget) GetTargetType() TargetType {
+	if ct != nil {
+		return ct.targeType
+	}
+
+	return 0
+}
+
+func (ct *ChainTarget) GetName() string {
+	if ct != nil {
+		return ct.name
+	}
+
+	return ""
+}
+
+type chainKind interface {
+	isChainKind()
+}
+
+type Chain struct {
+	kind chainKind
+}
+
+func (c *Chain) SetKind(kind chainKind) {
+	c.kind = kind
+}
+
+func (c *Chain) GetKind() chainKind {
+	return c.kind
+}
+
+type ChainRaw struct {
+	Raw []byte
+}
+
+func (*ChainRaw) isChainKind() {}
+
+func (c *ChainRaw) SetRaw(raw []byte) {
+	c.Raw = raw
+}
+
+func (c *ChainRaw) GetRaw() []byte {
+	return c.Raw
+}

apemanager/convert.go

@@ -0,0 +1,358 @@
+package apemanager
+
+import (
+	ape "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/ape"
+	apeGRPC "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/ape/grpc"
+	apemanager "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/apemanager/grpc"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/grpc"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/message"
+)
+
+func (reqBody *AddChainRequestBody) ToGRPCMessage() grpc.Message {
+	var reqBodygrpc *apemanager.AddChainRequest_Body
+
+	if reqBody != nil {
+		reqBodygrpc = new(apemanager.AddChainRequest_Body)
+
+		reqBodygrpc.SetTarget(reqBody.GetTarget().ToGRPCMessage().(*apeGRPC.ChainTarget))
+		reqBodygrpc.SetChain(reqBody.GetChain().ToGRPCMessage().(*apeGRPC.Chain))
+	}
+
+	return reqBodygrpc
+}
+
+func (reqBody *AddChainRequestBody) FromGRPCMessage(m grpc.Message) error {
+	reqBodygrpc, ok := m.(*apemanager.AddChainRequest_Body)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, reqBodygrpc)
+	}
+
+	if targetgrpc := reqBodygrpc.GetTarget(); targetgrpc != nil {
+		reqBody.target = new(ape.ChainTarget)
+		if err := reqBody.target.FromGRPCMessage(targetgrpc); err != nil {
+			return err
+		}
+	}
+
+	if chaingrpc := reqBodygrpc.GetChain(); chaingrpc != nil {
+		reqBody.chain = new(ape.Chain)
+		if err := reqBody.GetChain().FromGRPCMessage(chaingrpc); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (req *AddChainRequest) ToGRPCMessage() grpc.Message {
+	var reqgrpc *apemanager.AddChainRequest
+
+	if req != nil {
+		reqgrpc = new(apemanager.AddChainRequest)
+
+		reqgrpc.SetBody(req.GetBody().ToGRPCMessage().(*apemanager.AddChainRequest_Body))
+		req.RequestHeaders.ToMessage(reqgrpc)
+	}
+
+	return reqgrpc
+}
+
+func (req *AddChainRequest) FromGRPCMessage(m grpc.Message) error {
+	reqgrpc, ok := m.(*apemanager.AddChainRequest)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, reqgrpc)
+	}
+
+	if reqBodygrpc := reqgrpc.GetBody(); reqBodygrpc != nil {
+		req.body = new(AddChainRequestBody)
+		if err := req.body.FromGRPCMessage(reqBodygrpc); err != nil {
+			return err
+		}
+	}
+
+	return req.RequestHeaders.FromMessage(reqgrpc)
+}
+
+func (respBody *AddChainResponseBody) ToGRPCMessage() grpc.Message {
+	var respBodygrpc *apemanager.AddChainResponse_Body
+
+	if respBody != nil {
+		respBodygrpc = new(apemanager.AddChainResponse_Body)
+
+		respBodygrpc.SetChainId(respBody.GetChainID())
+	}
+
+	return respBodygrpc
+}
+
+func (respBody *AddChainResponseBody) FromGRPCMessage(m grpc.Message) error {
+	respBodygrpc, ok := m.(*apemanager.AddChainResponse_Body)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, respBodygrpc)
+	}
+
+	respBody.SetChainID(respBodygrpc.GetChainId())
+
+	return nil
+}
+
+func (resp *AddChainResponse) ToGRPCMessage() grpc.Message {
+	var respgrpc *apemanager.AddChainResponse
+
+	if resp != nil {
+		respgrpc = new(apemanager.AddChainResponse)
+
+		respgrpc.SetBody(resp.body.ToGRPCMessage().(*apemanager.AddChainResponse_Body))
+		resp.ResponseHeaders.ToMessage(respgrpc)
+	}
+
+	return respgrpc
+}
+
+func (resp *AddChainResponse) FromGRPCMessage(m grpc.Message) error {
+	respgrpc, ok := m.(*apemanager.AddChainResponse)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, respgrpc)
+	}
+
+	if respBodygrpc := respgrpc.GetBody(); respBodygrpc != nil {
+		resp.body = new(AddChainResponseBody)
+		if err := resp.body.FromGRPCMessage(respBodygrpc); err != nil {
+			return err
+		}
+	}
+
+	return resp.ResponseHeaders.FromMessage(respgrpc)
+}
+
+func (reqBody *RemoveChainRequestBody) ToGRPCMessage() grpc.Message {
+	var reqBodygrpc *apemanager.RemoveChainRequest_Body
+
+	if reqBody != nil {
+		reqBodygrpc = new(apemanager.RemoveChainRequest_Body)
+
+		reqBodygrpc.SetTarget(reqBody.target.ToGRPCMessage().(*apeGRPC.ChainTarget))
+		reqBodygrpc.SetChainId(reqBody.GetChainID())
+	}
+
+	return reqBodygrpc
+}
+
+func (reqBody *RemoveChainRequestBody) FromGRPCMessage(m grpc.Message) error {
+	reqBodygrpc, ok := m.(*apemanager.RemoveChainRequest_Body)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, reqBodygrpc)
+	}
+
+	if targetgrpc := reqBodygrpc.GetTarget(); targetgrpc != nil {
+		reqBody.target = new(ape.ChainTarget)
+		if err := reqBody.target.FromGRPCMessage(targetgrpc); err != nil {
+			return err
+		}
+	}
+
+	reqBody.SetChainID(reqBodygrpc.GetChainId())
+
+	return nil
+}
+
+func (req *RemoveChainRequest) ToGRPCMessage() grpc.Message {
+	var reqgrpc *apemanager.RemoveChainRequest
+
+	if req != nil {
+		reqgrpc = new(apemanager.RemoveChainRequest)
+
+		reqgrpc.SetBody(req.body.ToGRPCMessage().(*apemanager.RemoveChainRequest_Body))
+		req.RequestHeaders.ToMessage(reqgrpc)
+	}
+
+	return reqgrpc
+}
+
+func (req *RemoveChainRequest) FromGRPCMessage(m grpc.Message) error {
+	reqgrpc, ok := m.(*apemanager.RemoveChainRequest)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, reqgrpc)
+	}
+
+	if reqBodygrpc := reqgrpc.GetBody(); reqBodygrpc != nil {
+		req.body = new(RemoveChainRequestBody)
+		if err := req.body.FromGRPCMessage(reqBodygrpc); err != nil {
+			return err
+		}
+	}
+
+	return req.RequestHeaders.FromMessage(reqgrpc)
+}
+
+func (respBody *RemoveChainResponseBody) ToGRPCMessage() grpc.Message {
+	var respBodygrpc *apemanager.RemoveChainResponse_Body
+
+	if respBody != nil {
+		respBodygrpc = new(apemanager.RemoveChainResponse_Body)
+	}
+
+	return respBodygrpc
+}
+
+func (respBody *RemoveChainResponseBody) FromGRPCMessage(m grpc.Message) error {
+	respBodygrpc, ok := m.(*apemanager.RemoveChainResponse_Body)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, respBodygrpc)
+	}
+
+	return nil
+}
+
+func (resp *RemoveChainResponse) ToGRPCMessage() grpc.Message {
+	var respgrpc *apemanager.RemoveChainResponse
+
+	if resp != nil {
+		respgrpc = new(apemanager.RemoveChainResponse)
+
+		respgrpc.SetBody(resp.body.ToGRPCMessage().(*apemanager.RemoveChainResponse_Body))
+		resp.ResponseHeaders.ToMessage(respgrpc)
+	}
+
+	return respgrpc
+}
+
+func (resp *RemoveChainResponse) FromGRPCMessage(m grpc.Message) error {
+	respgrpc, ok := m.(*apemanager.RemoveChainResponse)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, respgrpc)
+	}
+
+	if respBodygrpc := respgrpc.GetBody(); respBodygrpc != nil {
+		resp.body = new(RemoveChainResponseBody)
+		if err := resp.body.FromGRPCMessage(respBodygrpc); err != nil {
+			return err
+		}
+	}
+
+	return resp.ResponseHeaders.FromMessage(respgrpc)
+}
+
+func (reqBody *ListChainsRequestBody) ToGRPCMessage() grpc.Message {
+	var reqBodygrpc *apemanager.ListChainsRequest_Body
+
+	if reqBody != nil {
+		reqBodygrpc = new(apemanager.ListChainsRequest_Body)
+
+		reqBodygrpc.SetTarget(reqBody.target.ToGRPCMessage().(*apeGRPC.ChainTarget))
+	}
+
+	return reqBodygrpc
+}
+
+func (reqBody *ListChainsRequestBody) FromGRPCMessage(m grpc.Message) error {
+	reqBodygrpc, ok := m.(*apemanager.ListChainsRequest_Body)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, reqBodygrpc)
+	}
+
+	if targetgrpc := reqBodygrpc.GetTarget(); targetgrpc != nil {
+		reqBody.target = new(ape.ChainTarget)
+		if err := reqBody.target.FromGRPCMessage(targetgrpc); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (req *ListChainsRequest) ToGRPCMessage() grpc.Message {
+	var reqgrpc *apemanager.ListChainsRequest
+
+	if req != nil {
+		reqgrpc = new(apemanager.ListChainsRequest)
+
+		reqgrpc.SetBody(req.body.ToGRPCMessage().(*apemanager.ListChainsRequest_Body))
+		req.RequestHeaders.ToMessage(reqgrpc)
+	}
+
+	return reqgrpc
+}
+
+func (req *ListChainsRequest) FromGRPCMessage(m grpc.Message) error {
+	reqgrpc, ok := m.(*apemanager.ListChainsRequest)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, reqgrpc)
+	}
+
+	if reqBodygrpc := reqgrpc.GetBody(); reqBodygrpc != nil {
+		req.body = new(ListChainsRequestBody)
+		if err := req.body.FromGRPCMessage(reqBodygrpc); err != nil {
+			return err
+		}
+	}
+
+	return req.RequestHeaders.FromMessage(reqgrpc)
+}
+
+func (respBody *ListChainsResponseBody) ToGRPCMessage() grpc.Message {
+	var respBodygrpc *apemanager.ListChainsResponse_Body
+
+	if respBody != nil {
+		respBodygrpc = new(apemanager.ListChainsResponse_Body)
+
+		chainsgrpc := make([]*apeGRPC.Chain, 0, len(respBody.GetChains()))
+		for _, chain := range respBody.GetChains() {
+			chainsgrpc = append(chainsgrpc, chain.ToGRPCMessage().(*apeGRPC.Chain))
+		}
+
+		respBodygrpc.SetChains(chainsgrpc)
+	}
+
+	return respBodygrpc
+}
+
+func (respBody *ListChainsResponseBody) FromGRPCMessage(m grpc.Message) error {
+	respBodygrpc, ok := m.(*apemanager.ListChainsResponse_Body)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, respBodygrpc)
+	}
+
+	chains := make([]*ape.Chain, 0, len(respBodygrpc.GetChains()))
+
+	for _, chaingrpc := range respBodygrpc.GetChains() {
+		chain := new(ape.Chain)
+		if err := chain.FromGRPCMessage(chaingrpc); err != nil {
+			return err
+		}
+		chains = append(chains, chain)
+	}
+
+	respBody.SetChains(chains)
+
+	return nil
+}
+
+func (resp *ListChainsResponse) ToGRPCMessage() grpc.Message {
+	var respgrpc *apemanager.ListChainsResponse
+
+	if resp != nil {
+		respgrpc = new(apemanager.ListChainsResponse)
+
+		respgrpc.SetBody(resp.body.ToGRPCMessage().(*apemanager.ListChainsResponse_Body))
+		resp.ResponseHeaders.ToMessage(respgrpc)
+	}
+
+	return respgrpc
+}
+
+func (resp *ListChainsResponse) FromGRPCMessage(m grpc.Message) error {
+	respgrpc, ok := m.(*apemanager.ListChainsResponse)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, respgrpc)
+	}
+
+	if respBodygrpc := respgrpc.GetBody(); respBodygrpc != nil {
+		resp.body = new(ListChainsResponseBody)
+		if err := resp.body.FromGRPCMessage(respBodygrpc); err != nil {
+			return err
+		}
+	}
+
+	return resp.ResponseHeaders.FromMessage(respgrpc)
+}

apemanager/grpc/service.go

@@ -0,0 +1,106 @@
+package apemanager
+
+import (
+	ape "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/ape/grpc"
+	session "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/session/grpc"
+)
+
+func (rb *AddChainRequest_Body) SetTarget(t *ape.ChainTarget) {
+	rb.Target = t
+}
+
+func (rb *AddChainRequest_Body) SetChain(chain *ape.Chain) {
+	rb.Chain = chain
+}
+
+func (r *AddChainRequest) SetBody(rb *AddChainRequest_Body) {
+	r.Body = rb
+}
+
+func (r *AddChainRequest) SetMetaHeader(mh *session.RequestMetaHeader) {
+	r.MetaHeader = mh
+}
+
+func (r *AddChainRequest) SetVerifyHeader(vh *session.RequestVerificationHeader) {
+	r.VerifyHeader = vh
+}
+
+func (rb *AddChainResponse_Body) SetChainId(chainID []byte) {
+	rb.ChainId = chainID
+}
+
+func (r *AddChainResponse) SetBody(rb *AddChainResponse_Body) {
+	r.Body = rb
+}
+
+func (r *AddChainResponse) SetMetaHeader(mh *session.ResponseMetaHeader) {
+	r.MetaHeader = mh
+}
+
+func (r *AddChainResponse) SetVerifyHeader(vh *session.ResponseVerificationHeader) {
+	r.VerifyHeader = vh
+}
+
+func (rb *RemoveChainRequest_Body) SetTarget(t *ape.ChainTarget) {
+	rb.Target = t
+}
+
+func (rb *RemoveChainRequest_Body) SetChainId(chainID []byte) {
+	rb.ChainId = chainID
+}
+
+func (r *RemoveChainRequest) SetBody(rb *RemoveChainRequest_Body) {
+	r.Body = rb
+}
+
+func (r *RemoveChainRequest) SetMetaHeader(mh *session.RequestMetaHeader) {
+	r.MetaHeader = mh
+}
+
+func (r *RemoveChainRequest) SetVerifyHeader(vh *session.RequestVerificationHeader) {
+	r.VerifyHeader = vh
+}
+
+func (r *RemoveChainResponse) SetBody(rb *RemoveChainResponse_Body) {
+	r.Body = rb
+}
+
+func (r *RemoveChainResponse) SetMetaHeader(mh *session.ResponseMetaHeader) {
+	r.MetaHeader = mh
+}
+
+func (r *RemoveChainResponse) SetVerifyHeader(vh *session.ResponseVerificationHeader) {
+	r.VerifyHeader = vh
+}
+
+func (r *ListChainsRequest_Body) SetTarget(t *ape.ChainTarget) {
+	r.Target = t
+}
+
+func (r *ListChainsRequest) SetBody(rb *ListChainsRequest_Body) {
+	r.Body = rb
+}
+
+func (r *ListChainsRequest) SetMetaHeader(mh *session.RequestMetaHeader) {
+	r.MetaHeader = mh
+}
+
+func (r *ListChainsRequest) SetVerifyHeader(vh *session.RequestVerificationHeader) {
+	r.VerifyHeader = vh
+}
+
+func (rb *ListChainsResponse_Body) SetChains(chains []*ape.Chain) {
+	rb.Chains = chains
+}
+
+func (r *ListChainsResponse) SetBody(rb *ListChainsResponse_Body) {
+	r.Body = rb
+}
+
+func (r *ListChainsResponse) SetMetaHeader(mh *session.ResponseMetaHeader) {
+	r.MetaHeader = mh
+}
+
+func (r *ListChainsResponse) SetVerifyHeader(vh *session.ResponseVerificationHeader) {
+	r.VerifyHeader = vh
+}

apemanager/marshal.go

@@ -0,0 +1,205 @@
+package apemanager
+
+import (
+	apemanager "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/apemanager/grpc"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/message"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/util/proto"
+)
+
+const (
+	addChainReqBodyTargetField = 1
+	addChainReqBodyChainField  = 2
+
+	addChainRespBodyChainIDField = 1
+
+	removeChainReqBodyTargetField = 1
+	removeChainReqBodyChainField  = 2
+
+	/*
+		Fields for RemoveResponseBody are missed since RemoveResponseBody is empty.
+	*/
+
+	listChainsReqBodyTargetField = 1
+
+	listChainsRespBodyChainsField = 1
+)
+
+func (rb *AddChainRequestBody) StableSize() (size int) {
+	if rb == nil {
+		return 0
+	}
+
+	size += proto.NestedStructureSize(addChainReqBodyTargetField, rb.target)
+	size += proto.NestedStructureSize(addChainReqBodyChainField, rb.chain)
+
+	return size
+}
+
+func (rb *AddChainRequestBody) StableMarshal(buf []byte) []byte {
+	if rb == nil {
+		return []byte{}
+	}
+
+	if buf == nil {
+		buf = make([]byte, rb.StableSize())
+	}
+
+	var offset int
+
+	offset += proto.NestedStructureMarshal(addChainReqBodyTargetField, buf[offset:], rb.target)
+	proto.NestedStructureMarshal(addChainReqBodyChainField, buf[offset:], rb.chain)
+
+	return buf
+}
+
+func (rb *AddChainRequestBody) Unmarshal(data []byte) error {
+	return message.Unmarshal(rb, data, new(apemanager.AddChainRequest_Body))
+}
+
+func (rb *AddChainResponseBody) StableSize() (size int) {
+	if rb == nil {
+		return 0
+	}
+
+	size += proto.BytesSize(addChainRespBodyChainIDField, rb.chainID)
+
+	return size
+}
+
+func (rb *AddChainResponseBody) StableMarshal(buf []byte) []byte {
+	if rb == nil {
+		return []byte{}
+	}
+
+	if buf == nil {
+		buf = make([]byte, rb.StableSize())
+	}
+
+	var offset int
+
+	proto.BytesMarshal(addChainRespBodyChainIDField, buf[offset:], rb.chainID)
+
+	return buf
+}
+
+func (rb *AddChainResponseBody) Unmarshal(data []byte) error {
+	return message.Unmarshal(rb, data, new(apemanager.AddChainResponse_Body))
+}
+
+func (rb *RemoveChainRequestBody) StableSize() (size int) {
+	if rb == nil {
+		return 0
+	}
+
+	size += proto.NestedStructureSize(addChainReqBodyTargetField, rb.target)
+	size += proto.BytesSize(addChainReqBodyChainField, rb.chainID)
+
+	return size
+}
+
+func (rb *RemoveChainRequestBody) StableMarshal(buf []byte) []byte {
+	if rb == nil {
+		return []byte{}
+	}
+
+	if buf == nil {
+		buf = make([]byte, rb.StableSize())
+	}
+
+	var offset int
+
+	offset += proto.NestedStructureMarshal(removeChainReqBodyTargetField, buf[offset:], rb.target)
+	proto.BytesMarshal(removeChainReqBodyChainField, buf[offset:], rb.chainID)
+
+	return buf
+}
+
+func (rb *RemoveChainRequestBody) Unmarshal(data []byte) error {
+	return message.Unmarshal(rb, data, new(apemanager.RemoveChainRequest_Body))
+}
+
+func (rb *RemoveChainResponseBody) StableSize() (size int) {
+	if rb == nil {
+		return 0
+	}
+
+	return size
+}
+
+func (rb *RemoveChainResponseBody) StableMarshal(buf []byte) []byte {
+	if rb == nil {
+		return []byte{}
+	}
+
+	if buf == nil {
+		buf = make([]byte, rb.StableSize())
+	}
+
+	return buf
+}
+
+func (rb *RemoveChainResponseBody) Unmarshal(data []byte) error {
+	return message.Unmarshal(rb, data, new(apemanager.RemoveChainResponse_Body))
+}
+
+func (rb *ListChainsRequestBody) StableSize() (size int) {
+	if rb == nil {
+		return 0
+	}
+
+	size += proto.NestedStructureSize(listChainsReqBodyTargetField, rb.target)
+
+	return size
+}
+
+func (rb *ListChainsRequestBody) StableMarshal(buf []byte) []byte {
+	if rb == nil {
+		return []byte{}
+	}
+
+	if buf == nil {
+		buf = make([]byte, rb.StableSize())
+	}
+
+	var offset int
+	proto.NestedStructureMarshal(addChainReqBodyTargetField, buf[offset:], rb.target)
+
+	return buf
+}
+
+func (rb *ListChainsRequestBody) Unmarshal(data []byte) error {
+	return message.Unmarshal(rb, data, new(apemanager.ListChainsRequest_Body))
+}
+
+func (rb *ListChainsResponseBody) StableSize() (size int) {
+	if rb == nil {
+		return 0
+	}
+
+	for _, chain := range rb.GetChains() {
+		size += proto.NestedStructureSize(listChainsRespBodyChainsField, chain)
+	}
+
+	return size
+}
+
+func (rb *ListChainsResponseBody) StableMarshal(buf []byte) []byte {
+	if rb == nil {
+		return []byte{}
+	}
+
+	if buf == nil {
+		buf = make([]byte, rb.StableSize())
+	}
+
+	var offset int
+	for _, chain := range rb.GetChains() {
+		offset += proto.NestedStructureMarshal(listChainsRespBodyChainsField, buf[offset:], chain)
+	}
+
+	return buf
+}
+
+func (rb *ListChainsResponseBody) Unmarshal(data []byte) error {
+	return message.Unmarshal(rb, data, new(apemanager.ListChainsResponse_Body))
+}

apemanager/message_test.go

@@ -0,0 +1,26 @@
+package apemanager_test
+
+import (
+	"testing"
+
+	apemanagertest "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/apemanager/test"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/message"
+	messagetest "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/message/test"
+)
+
+func TestMessageConvert(t *testing.T) {
+	messagetest.TestRPCMessage(t,
+		func(empty bool) message.Message { return apemanagertest.GenerateAddChainRequestBody(empty) },
+		func(empty bool) message.Message { return apemanagertest.GenerateAddChainRequest(empty) },
+		func(empty bool) message.Message { return apemanagertest.GenerateAddChainResponseBody(empty) },
+		func(empty bool) message.Message { return apemanagertest.GenerateAddChainResponse(empty) },
+		func(empty bool) message.Message { return apemanagertest.GenerateRemoveChainRequestBody(empty) },
+		func(empty bool) message.Message { return apemanagertest.GenerateRemoveChainRequest(empty) },
+		func(empty bool) message.Message { return apemanagertest.GenerateRemoveChainResponseBody(empty) },
+		func(empty bool) message.Message { return apemanagertest.GenerateRemoveChainResponse(empty) },
+		func(empty bool) message.Message { return apemanagertest.GenerateListChainsRequestBody(empty) },
+		func(empty bool) message.Message { return apemanagertest.GenerateListChainsRequest(empty) },
+		func(empty bool) message.Message { return apemanagertest.GenerateListChainsResponseBody(empty) },
+		func(empty bool) message.Message { return apemanagertest.GenerateListChainsResponse(empty) },
+	)
+}

apemanager/status.go

@@ -0,0 +1,76 @@
+package apemanager
+
+import (
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/status"
+	statusgrpc "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/status/grpc"
+)
+
+// LocalizeFailStatus checks if passed global status.Code is related to ape manager failure and:
+//
+//	then localizes the code and returns true,
+//	else leaves the code unchanged and returns false.
+//
+// Arg must be non-nil.
+func LocalizeFailStatus(c *status.Code) bool {
+	return status.LocalizeIfInSection(c, uint32(statusgrpc.Section_SECTION_APE_MANAGER))
+}
+
+// GlobalizeFail globalizes local code of ape manager failure.
+//
+// Arg must be non-nil.
+func GlobalizeFail(c *status.Code) {
+	c.GlobalizeSection(uint32(statusgrpc.Section_SECTION_APE_MANAGER))
+}
+
+const (
+	// StatusAPEManagerAccessDenied is a local status.Code value for
+	// ACCESS_DENIED ape manager failure.
+	StatusAPEManagerAccessDenied status.Code = iota
+)
+
+const (
+	// detailAccessDeniedDesc is a StatusAccessDenied detail ID for
+	// human-readable description.
+	detailAccessDeniedDesc = iota
+)
+
+// WriteAccessDeniedDesc writes human-readable description of StatusAccessDenied
+// into status.Status as a detail. The status must not be nil.
+//
+// Existing details are expected to be ID-unique, otherwise undefined behavior.
+func WriteAccessDeniedDesc(st *status.Status, desc string) {
+	var found bool
+
+	st.IterateDetails(func(d *status.Detail) bool {
+		if d.ID() == detailAccessDeniedDesc {
+			found = true
+			d.SetValue([]byte(desc))
+		}
+
+		return found
+	})
+
+	if !found {
+		var d status.Detail
+
+		d.SetID(detailAccessDeniedDesc)
+		d.SetValue([]byte(desc))
+
+		st.AppendDetails(d)
+	}
+}
+
+// ReadAccessDeniedDesc looks up for status detail with human-readable description
+// of StatusAccessDenied. Returns empty string if detail is missing.
+func ReadAccessDeniedDesc(st status.Status) (desc string) {
+	st.IterateDetails(func(d *status.Detail) bool {
+		if d.ID() == detailAccessDeniedDesc {
+			desc = string(d.Value())
+			return true
+		}
+
+		return false
+	})
+
+	return
+}

apemanager/status_test.go

@@ -0,0 +1,30 @@
+package apemanager_test
+
+import (
+	"testing"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/apemanager"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/status"
+	statustest "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/status/test"
+	"github.com/stretchr/testify/require"
+)
+
+func TestStatusCodes(t *testing.T) {
+	statustest.TestCodes(t, apemanager.LocalizeFailStatus, apemanager.GlobalizeFail,
+		apemanager.StatusAPEManagerAccessDenied, 5120,
+	)
+}
+
+func TestAccessDeniedDesc(t *testing.T) {
+	var st status.Status
+
+	require.Empty(t, apemanager.ReadAccessDeniedDesc(st))
+
+	const desc = "some description"
+
+	apemanager.WriteAccessDeniedDesc(&st, desc)
+	require.Equal(t, desc, apemanager.ReadAccessDeniedDesc(st))
+
+	apemanager.WriteAccessDeniedDesc(&st, desc+"1")
+	require.Equal(t, desc+"1", apemanager.ReadAccessDeniedDesc(st))
+}

apemanager/test/generate.go

@@ -0,0 +1,143 @@
+package apemanagertest
+
+import (
+	apetest "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/ape/test"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/apemanager"
+	sessiontest "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/session/test"
+)
+
+func generateChainID(empty bool) []byte {
+	if empty {
+		return []byte{}
+	}
+
+	return []byte("616c6c6f774f626a476574436e72")
+}
+
+func GenerateAddChainRequestBody(empty bool) *apemanager.AddChainRequestBody {
+	m := new(apemanager.AddChainRequestBody)
+
+	if !empty {
+		m.SetTarget(apetest.GenerateChainTarget(empty))
+		m.SetChain(apetest.GenerateRawChain(empty))
+	}
+
+	return m
+}
+
+func GenerateAddChainRequest(empty bool) *apemanager.AddChainRequest {
+	m := new(apemanager.AddChainRequest)
+
+	if !empty {
+		m.SetBody(GenerateAddChainRequestBody(empty))
+		m.SetMetaHeader(sessiontest.GenerateRequestMetaHeader(empty))
+		m.SetVerificationHeader(sessiontest.GenerateRequestVerificationHeader(empty))
+	}
+
+	return m
+}
+
+func GenerateAddChainResponseBody(empty bool) *apemanager.AddChainResponseBody {
+	m := new(apemanager.AddChainResponseBody)
+
+	if !empty {
+		m.SetChainID(generateChainID(empty))
+	}
+
+	return m
+}
+
+func GenerateAddChainResponse(empty bool) *apemanager.AddChainResponse {
+	m := new(apemanager.AddChainResponse)
+
+	if !empty {
+		m.SetBody(GenerateAddChainResponseBody(empty))
+		m.SetMetaHeader(sessiontest.GenerateResponseMetaHeader(empty))
+		m.SetVerificationHeader(sessiontest.GenerateResponseVerificationHeader(empty))
+	}
+
+	return m
+}
+
+func GenerateRemoveChainRequestBody(empty bool) *apemanager.RemoveChainRequestBody {
+	m := new(apemanager.RemoveChainRequestBody)
+
+	if !empty {
+		m.SetChainID(generateChainID(empty))
+		m.SetTarget(apetest.GenerateChainTarget(empty))
+	}
+
+	return m
+}
+
+func GenerateRemoveChainRequest(empty bool) *apemanager.RemoveChainRequest {
+	m := new(apemanager.RemoveChainRequest)
+
+	if !empty {
+		m.SetBody(GenerateRemoveChainRequestBody(empty))
+		m.SetMetaHeader(sessiontest.GenerateRequestMetaHeader(empty))
+		m.SetVerificationHeader(sessiontest.GenerateRequestVerificationHeader(empty))
+	}
+
+	return m
+}
+
+func GenerateRemoveChainResponseBody(_ bool) *apemanager.RemoveChainResponseBody {
+	return new(apemanager.RemoveChainResponseBody)
+}
+
+func GenerateRemoveChainResponse(empty bool) *apemanager.RemoveChainResponse {
+	m := new(apemanager.RemoveChainResponse)
+
+	if !empty {
+		m.SetBody(GenerateRemoveChainResponseBody(empty))
+		m.SetMetaHeader(sessiontest.GenerateResponseMetaHeader(empty))
+		m.SetVerificationHeader(sessiontest.GenerateResponseVerificationHeader(empty))
+	}
+
+	return m
+}
+
+func GenerateListChainsRequestBody(empty bool) *apemanager.ListChainsRequestBody {
+	m := new(apemanager.ListChainsRequestBody)
+
+	if !empty {
+		m.SetTarget(apetest.GenerateChainTarget(empty))
+	}
+
+	return m
+}
+
+func GenerateListChainsRequest(empty bool) *apemanager.ListChainsRequest {
+	m := new(apemanager.ListChainsRequest)
+
+	if !empty {
+		m.SetBody(GenerateListChainsRequestBody(empty))
+		m.SetMetaHeader(sessiontest.GenerateRequestMetaHeader(empty))
+		m.SetVerificationHeader(sessiontest.GenerateRequestVerificationHeader(empty))
+	}
+
+	return m
+}
+
+func GenerateListChainsResponseBody(empty bool) *apemanager.ListChainsResponseBody {
+	m := new(apemanager.ListChainsResponseBody)
+
+	if !empty {
+		m.SetChains(apetest.GenerateRawChains(empty, 10))
+	}
+
+	return m
+}
+
+func GenerateListChainsResponse(empty bool) *apemanager.ListChainsResponse {
+	m := new(apemanager.ListChainsResponse)
+
+	if !empty {
+		m.SetBody(GenerateListChainsResponseBody(empty))
+		m.SetMetaHeader(sessiontest.GenerateResponseMetaHeader(empty))
+		m.SetVerificationHeader(sessiontest.GenerateResponseVerificationHeader(empty))
+	}
+
+	return m
+}

apemanager/types.go

@@ -0,0 +1,175 @@
+package apemanager
+
+import (
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/ape"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/session"
+)
+
+type AddChainRequest struct {
+	body *AddChainRequestBody
+
+	session.RequestHeaders
+}
+
+func (r *AddChainRequest) SetBody(body *AddChainRequestBody) {
+	r.body = body
+}
+
+func (r *AddChainRequest) GetBody() *AddChainRequestBody {
+	return r.body
+}
+
+type AddChainRequestBody struct {
+	target *ape.ChainTarget
+
+	chain *ape.Chain
+}
+
+func (rb *AddChainRequestBody) SetTarget(target *ape.ChainTarget) {
+	rb.target = target
+}
+
+func (rb *AddChainRequestBody) GetTarget() *ape.ChainTarget {
+	return rb.target
+}
+
+func (rb *AddChainRequestBody) SetChain(chain *ape.Chain) {
+	rb.chain = chain
+}
+
+func (rb *AddChainRequestBody) GetChain() *ape.Chain {
+	return rb.chain
+}
+
+type AddChainResponse struct {
+	body *AddChainResponseBody
+
+	session.ResponseHeaders
+}
+
+func (r *AddChainResponse) SetBody(body *AddChainResponseBody) {
+	r.body = body
+}
+
+func (r *AddChainResponse) GetBody() *AddChainResponseBody {
+	return r.body
+}
+
+type AddChainResponseBody struct {
+	chainID []byte
+}
+
+func (rb *AddChainResponseBody) SetChainID(chainID []byte) {
+	rb.chainID = chainID
+}
+
+func (rb *AddChainResponseBody) GetChainID() []byte {
+	return rb.chainID
+}
+
+type RemoveChainRequest struct {
+	body *RemoveChainRequestBody
+
+	session.RequestHeaders
+}
+
+func (r *RemoveChainRequest) SetBody(body *RemoveChainRequestBody) {
+	r.body = body
+}
+
+func (r *RemoveChainRequest) GetBody() *RemoveChainRequestBody {
+	return r.body
+}
+
+type RemoveChainRequestBody struct {
+	target *ape.ChainTarget
+
+	chainID []byte
+}
+
+func (rb *RemoveChainRequestBody) SetTarget(target *ape.ChainTarget) {
+	rb.target = target
+}
+
+func (rb *RemoveChainRequestBody) GetTarget() *ape.ChainTarget {
+	return rb.target
+}
+
+func (rb *RemoveChainRequestBody) SetChainID(chainID []byte) {
+	rb.chainID = chainID
+}
+
+func (rb *RemoveChainRequestBody) GetChainID() []byte {
+	return rb.chainID
+}
+
+type RemoveChainResponse struct {
+	body *RemoveChainResponseBody
+
+	session.ResponseHeaders
+}
+
+type RemoveChainResponseBody struct {
+}
+
+func (r *RemoveChainResponse) SetBody(body *RemoveChainResponseBody) {
+	r.body = body
+}
+
+func (r *RemoveChainResponse) GetBody() *RemoveChainResponseBody {
+	return r.body
+}
+
+type ListChainsRequest struct {
+	body *ListChainsRequestBody
+
+	session.RequestHeaders
+}
+
+func (r *ListChainsRequest) SetBody(body *ListChainsRequestBody) {
+	r.body = body
+}
+
+func (r *ListChainsRequest) GetBody() *ListChainsRequestBody {
+	return r.body
+}
+
+type ListChainsRequestBody struct {
+	target *ape.ChainTarget
+}
+
+func (rb *ListChainsRequestBody) SetTarget(target *ape.ChainTarget) {
+	rb.target = target
+}
+
+func (rb *ListChainsRequestBody) GetTarget() *ape.ChainTarget {
+	return rb.target
+}
+
+type ListChainsResponse struct {
+	body *ListChainsResponseBody
+
+	session.ResponseHeaders
+}
+
+func (r *ListChainsResponse) SetBody(body *ListChainsResponseBody) {
+	r.body = body
+}
+
+func (r *ListChainsResponse) GetBody() *ListChainsResponseBody {
+	return r.body
+}
+
+type ListChainsResponseBody struct {
+	chains []*ape.Chain
+
+	session.RequestHeaders
+}
+
+func (r *ListChainsResponseBody) SetChains(chains []*ape.Chain) {
+	r.chains = chains
+}
+
+func (r *ListChainsResponseBody) GetChains() []*ape.Chain {
+	return r.chains
+}

audit/convert.go

@@ -1,94 +0,0 @@
-package audit
-
-import (
-	audit "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/audit/grpc"
-	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/refs"
-	refsGRPC "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/refs/grpc"
-	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/grpc"
-	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/message"
-)
-
-func (a *DataAuditResult) ToGRPCMessage() grpc.Message {
-	var m *audit.DataAuditResult
-
-	if a != nil {
-		m = new(audit.DataAuditResult)
-
-		m.SetAuditEpoch(a.auditEpoch)
-		m.SetPublicKey(a.pubKey)
-		m.SetContainerId(a.cid.ToGRPCMessage().(*refsGRPC.ContainerID))
-		m.SetComplete(a.complete)
-		m.SetVersion(a.version.ToGRPCMessage().(*refsGRPC.Version))
-		m.SetPassNodes(a.passNodes)
-		m.SetFailNodes(a.failNodes)
-		m.SetRetries(a.retries)
-		m.SetRequests(a.requests)
-		m.SetHit(a.hit)
-		m.SetMiss(a.miss)
-		m.SetFail(a.fail)
-		m.SetPassSg(refs.ObjectIDListToGRPCMessage(a.passSG))
-		m.SetFailSg(refs.ObjectIDListToGRPCMessage(a.failSG))
-	}
-
-	return m
-}
-
-func (a *DataAuditResult) FromGRPCMessage(m grpc.Message) error {
-	v, ok := m.(*audit.DataAuditResult)
-	if !ok {
-		return message.NewUnexpectedMessageType(m, v)
-	}
-
-	var err error
-
-	cid := v.GetContainerId()
-	if cid == nil {
-		a.cid = nil
-	} else {
-		if a.cid == nil {
-			a.cid = new(refs.ContainerID)
-		}
-
-		err = a.cid.FromGRPCMessage(cid)
-		if err != nil {
-			return err
-		}
-	}
-
-	version := v.GetVersion()
-	if version == nil {
-		a.version = nil
-	} else {
-		if a.version == nil {
-			a.version = new(refs.Version)
-		}
-
-		err = a.version.FromGRPCMessage(version)
-		if err != nil {
-			return err
-		}
-	}
-
-	a.passSG, err = refs.ObjectIDListFromGRPCMessage(v.GetPassSg())
-	if err != nil {
-		return err
-	}
-
-	a.failSG, err = refs.ObjectIDListFromGRPCMessage(v.GetFailSg())
-	if err != nil {
-		return err
-	}
-
-	a.auditEpoch = v.GetAuditEpoch()
-	a.pubKey = v.GetPublicKey()
-	a.complete = v.GetComplete()
-	a.passNodes = v.GetPassNodes()
-	a.failNodes = v.GetFailNodes()
-	a.retries = v.GetRetries()
-	a.requests = v.GetRequests()
-	a.hit = v.GetHit()
-	a.miss = v.GetMiss()
-	a.fail = v.GetFail()
-
-	return err
-}

audit/grpc/types.go

@@ -1,75 +0,0 @@
-package audit
-
-import (
-	refs "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/refs/grpc"
-)
-
-// SetVersion is a Version field setter.
-func (x *DataAuditResult) SetVersion(v *refs.Version) {
-	x.Version = v
-}
-
-// SetAuditEpoch is an AuditEpoch field setter.
-func (x *DataAuditResult) SetAuditEpoch(v uint64) {
-	x.AuditEpoch = v
-}
-
-// SetContainerId is a ContainerId field setter.
-func (x *DataAuditResult) SetContainerId(v *refs.ContainerID) {
-	x.ContainerId = v
-}
-
-// SetPublicKey is a PublicKey field setter.
-func (x *DataAuditResult) SetPublicKey(v []byte) {
-	x.PublicKey = v
-}
-
-// SetComplete is a Complete field setter.
-func (x *DataAuditResult) SetComplete(v bool) {
-	x.Complete = v
-}
-
-// SetRequests is a Requests field setter.
-func (x *DataAuditResult) SetRequests(v uint32) {
-	x.Requests = v
-}
-
-// SetRetries is a Retries field setter.
-func (x *DataAuditResult) SetRetries(v uint32) {
-	x.Retries = v
-}
-
-// SetPassSg is a PassSg field setter.
-func (x *DataAuditResult) SetPassSg(v []*refs.ObjectID) {
-	x.PassSg = v
-}
-
-// SetFailSg is a FailSg field setter.
-func (x *DataAuditResult) SetFailSg(v []*refs.ObjectID) {
-	x.FailSg = v
-}
-
-// SetHit is a Hit field setter.
-func (x *DataAuditResult) SetHit(v uint32) {
-	x.Hit = v
-}
-
-// SetMiss is a Miss field setter.
-func (x *DataAuditResult) SetMiss(v uint32) {
-	x.Miss = v
-}
-
-// SetFail is a Fail field setter.
-func (x *DataAuditResult) SetFail(v uint32) {
-	x.Fail = v
-}
-
-// SetPassNodes is a PassNodes field setter.
-func (x *DataAuditResult) SetPassNodes(v [][]byte) {
-	x.PassNodes = v
-}
-
-// SetFailNodes is a FailNodes field setter.
-func (x *DataAuditResult) SetFailNodes(v [][]byte) {
-	x.FailNodes = v
-}

audit/json.go

@@ -1,14 +0,0 @@
-package audit
-
-import (
-	audit "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/audit/grpc"
-	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/message"
-)
-
-func (a *DataAuditResult) MarshalJSON() ([]byte, error) {
-	return message.MarshalJSON(a)
-}
-
-func (a *DataAuditResult) UnmarshalJSON(data []byte) error {
-	return message.UnmarshalJSON(a, data, new(audit.DataAuditResult))
-}

audit/marshal.go

@@ -1,88 +0,0 @@
-package audit
-
-import (
-	audit "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/audit/grpc"
-	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/refs"
-	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/message"
-	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/util/proto"
-)
-
-const (
-	_ = iota
-	versionFNum
-	auditEpochFNum
-	cidFNum
-	pubKeyFNum
-	completeFNum
-	requestsFNum
-	retriesFNum
-	passSGFNum
-	failSGFNum
-	hitFNum
-	missFNum
-	failFNum
-	passNodesFNum
-	failNodesFNum
-)
-
-// StableMarshal marshals unified DataAuditResult structure into a protobuf
-// binary format without field order shuffle.
-func (a *DataAuditResult) StableMarshal(buf []byte) []byte {
-	if a == nil {
-		return []byte{}
-	}
-
-	if buf == nil {
-		buf = make([]byte, a.StableSize())
-	}
-
-	var offset int
-
-	offset += proto.NestedStructureMarshal(versionFNum, buf[offset:], a.version)
-	offset += proto.Fixed64Marshal(auditEpochFNum, buf[offset:], a.auditEpoch)
-	offset += proto.NestedStructureMarshal(cidFNum, buf[offset:], a.cid)
-	offset += proto.BytesMarshal(pubKeyFNum, buf[offset:], a.pubKey)
-	offset += proto.BoolMarshal(completeFNum, buf[offset:], a.complete)
-	offset += proto.UInt32Marshal(requestsFNum, buf[offset:], a.requests)
-	offset += proto.UInt32Marshal(retriesFNum, buf[offset:], a.retries)
-	offset += refs.ObjectIDNestedListMarshal(passSGFNum, buf[offset:], a.passSG)
-	offset += refs.ObjectIDNestedListMarshal(failSGFNum, buf[offset:], a.failSG)
-	offset += proto.UInt32Marshal(hitFNum, buf[offset:], a.hit)
-	offset += proto.UInt32Marshal(missFNum, buf[offset:], a.miss)
-	offset += proto.UInt32Marshal(failFNum, buf[offset:], a.fail)
-	offset += proto.RepeatedBytesMarshal(passNodesFNum, buf[offset:], a.passNodes)
-	proto.RepeatedBytesMarshal(failNodesFNum, buf[offset:], a.failNodes)
-
-	return buf
-}
-
-// StableSize returns byte length of DataAuditResult structure
-// marshaled by StableMarshal function.
-func (a *DataAuditResult) StableSize() (size int) {
-	if a == nil {
-		return 0
-	}
-
-	size += proto.NestedStructureSize(versionFNum, a.version)
-	size += proto.Fixed64Size(auditEpochFNum, a.auditEpoch)
-	size += proto.NestedStructureSize(cidFNum, a.cid)
-	size += proto.BytesSize(pubKeyFNum, a.pubKey)
-	size += proto.BoolSize(completeFNum, a.complete)
-	size += proto.UInt32Size(requestsFNum, a.requests)
-	size += proto.UInt32Size(retriesFNum, a.retries)
-	size += refs.ObjectIDNestedListSize(passSGFNum, a.passSG)
-	size += refs.ObjectIDNestedListSize(failSGFNum, a.failSG)
-	size += proto.UInt32Size(hitFNum, a.hit)
-	size += proto.UInt32Size(missFNum, a.miss)
-	size += proto.UInt32Size(failFNum, a.fail)
-	size += proto.RepeatedBytesSize(passNodesFNum, a.passNodes)
-	size += proto.RepeatedBytesSize(failNodesFNum, a.failNodes)
-
-	return size
-}
-
-// Unmarshal unmarshals DataAuditResult structure from its protobuf
-// binary representation.
-func (a *DataAuditResult) Unmarshal(data []byte) error {
-	return message.Unmarshal(a, data, new(audit.DataAuditResult))
-}

audit/test/generate.go

@@ -1,29 +0,0 @@
-package audittest
-
-import (
-	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/audit"
-	refstest "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/refs/test"
-)
-
-func GenerateDataAuditResult(empty bool) *audit.DataAuditResult {
-	m := new(audit.DataAuditResult)
-
-	if !empty {
-		m.SetPublicKey([]byte{1, 2, 3})
-		m.SetAuditEpoch(13)
-		m.SetHit(100)
-		m.SetMiss(200)
-		m.SetFail(300)
-		m.SetComplete(true)
-		m.SetPassNodes([][]byte{{1}, {2}})
-		m.SetFailNodes([][]byte{{3}, {4}})
-		m.SetRequests(666)
-		m.SetRetries(777)
-		m.SetVersion(refstest.GenerateVersion(false))
-		m.SetContainerID(refstest.GenerateContainerID(false))
-		m.SetPassSG(refstest.GenerateObjectIDs(false))
-		m.SetFailSG(refstest.GenerateObjectIDs(false))
-	}
-
-	return m
-}

audit/types.go

@@ -1,243 +0,0 @@
-package audit
-
-import (
-	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/refs"
-)
-
-// DataAuditResult is a unified structure of
-// DataAuditResult message from proto definition.
-type DataAuditResult struct {
-	version *refs.Version
-
-	auditEpoch uint64
-
-	requests, retries uint32
-
-	hit, miss, fail uint32
-
-	cid *refs.ContainerID
-
-	pubKey []byte
-
-	passSG, failSG []refs.ObjectID
-
-	failNodes, passNodes [][]byte
-
-	complete bool
-}
-
-// GetVersion returns version of Data Audit structure.
-func (a *DataAuditResult) GetVersion() *refs.Version {
-	if a != nil {
-		return a.version
-	}
-
-	return nil
-}
-
-// SetVersion sets version of Data Audit structure.
-func (a *DataAuditResult) SetVersion(v *refs.Version) {
-	a.version = v
-}
-
-// GetAuditEpoch returns epoch number when the Data Audit was conducted.
-func (a *DataAuditResult) GetAuditEpoch() uint64 {
-	if a != nil {
-		return a.auditEpoch
-	}
-
-	return 0
-}
-
-// SetAuditEpoch sets epoch number when the Data Audit was conducted.
-func (a *DataAuditResult) SetAuditEpoch(v uint64) {
-	a.auditEpoch = v
-}
-
-// GetContainerID returns container under audit.
-func (a *DataAuditResult) GetContainerID() *refs.ContainerID {
-	if a != nil {
-		return a.cid
-	}
-
-	return nil
-}
-
-// SetContainerID sets container under audit.
-func (a *DataAuditResult) SetContainerID(v *refs.ContainerID) {
-	a.cid = v
-}
-
-// GetPublicKey returns public key of the auditing InnerRing node in a binary format.
-func (a *DataAuditResult) GetPublicKey() []byte {
-	if a != nil {
-		return a.pubKey
-	}
-
-	return nil
-}
-
-// SetPublicKey sets public key of the auditing InnerRing node in a binary format.
-func (a *DataAuditResult) SetPublicKey(v []byte) {
-	a.pubKey = v
-}
-
-// GetPassSG returns list of Storage Groups that passed audit PoR stage.
-func (a *DataAuditResult) GetPassSG() []refs.ObjectID {
-	if a != nil {
-		return a.passSG
-	}
-
-	return nil
-}
-
-// SetPassSG sets list of Storage Groups that passed audit PoR stage.
-func (a *DataAuditResult) SetPassSG(v []refs.ObjectID) {
-	a.passSG = v
-}
-
-// GetFailSG returns list of Storage Groups that failed audit PoR stage.
-func (a *DataAuditResult) GetFailSG() []refs.ObjectID {
-	if a != nil {
-		return a.failSG
-	}
-
-	return nil
-}
-
-// SetFailSG sets list of Storage Groups that failed audit PoR stage.
-func (a *DataAuditResult) SetFailSG(v []refs.ObjectID) {
-	a.failSG = v
-}
-
-// GetRequests returns number of requests made by PoR audit check to get
-// all headers of the objects inside storage groups.
-func (a *DataAuditResult) GetRequests() uint32 {
-	if a != nil {
-		return a.requests
-	}
-
-	return 0
-}
-
-// SetRequests sets number of requests made by PoR audit check to get
-// all headers of the objects inside storage groups.
-func (a *DataAuditResult) SetRequests(v uint32) {
-	a.requests = v
-}
-
-// GetRetries returns number of retries made by PoR audit check to get
-// all headers of the objects inside storage groups.
-func (a *DataAuditResult) GetRetries() uint32 {
-	if a != nil {
-		return a.retries
-	}
-
-	return 0
-}
-
-// SetRetries sets number of retries made by PoR audit check to get
-// all headers of the objects inside storage groups.
-func (a *DataAuditResult) SetRetries(v uint32) {
-	a.retries = v
-}
-
-// GetHit returns number of sampled objects under audit placed
-// in an optimal way according to the containers placement policy
-// when checking PoP.
-func (a *DataAuditResult) GetHit() uint32 {
-	if a != nil {
-		return a.hit
-	}
-
-	return 0
-}
-
-// SetHit sets number of sampled objects under audit placed
-// in an optimal way according to the containers placement policy
-// when checking PoP.
-func (a *DataAuditResult) SetHit(v uint32) {
-	a.hit = v
-}
-
-// GetMiss returns number of sampled objects under audit placed
-// in suboptimal way according to the containers placement policy,
-// but still at a satisfactory level when checking PoP.
-func (a *DataAuditResult) GetMiss() uint32 {
-	if a != nil {
-		return a.miss
-	}
-
-	return 0
-}
-
-// SetMiss sets number of sampled objects under audit placed
-// in suboptimal way according to the containers placement policy,
-// but still at a satisfactory level when checking PoP.
-func (a *DataAuditResult) SetMiss(v uint32) {
-	a.miss = v
-}
-
-// GetFail returns number of sampled objects under audit stored
-// in a way not confirming placement policy or not found at all
-// when checking PoP.
-func (a *DataAuditResult) GetFail() uint32 {
-	if a != nil {
-		return a.fail
-	}
-
-	return 0
-}
-
-// SetFail sets number of sampled objects under audit stored
-// in a way not confirming placement policy or not found at all
-// when checking PoP.
-func (a *DataAuditResult) SetFail(v uint32) {
-	a.fail = v
-}
-
-// GetPassNodes returns list of storage node public keys that
-// passed at least one PDP.
-func (a *DataAuditResult) GetPassNodes() [][]byte {
-	if a != nil {
-		return a.passNodes
-	}
-
-	return nil
-}
-
-// SetPassNodes sets list of storage node public keys that
-// passed at least one PDP.
-func (a *DataAuditResult) SetPassNodes(v [][]byte) {
-	a.passNodes = v
-}
-
-// GetFailNodes returns list of storage node public keys that
-// failed at least one PDP.
-func (a *DataAuditResult) GetFailNodes() [][]byte {
-	if a != nil {
-		return a.failNodes
-	}
-
-	return nil
-}
-
-// SetFailNodes sets list of storage node public keys that
-// failed at least one PDP.
-func (a *DataAuditResult) SetFailNodes(v [][]byte) {
-	a.failNodes = v
-}
-
-// GetComplete returns boolean completion statement of audit result.
-func (a *DataAuditResult) GetComplete() bool {
-	if a != nil {
-		return a.complete
-	}
-
-	return false // bool default
-}
-
-// SetComplete sets boolean completion statement of audit result.
-func (a *DataAuditResult) SetComplete(v bool) {
-	a.complete = v
-}

go.mod

@@ -7,7 +7,7 @@ require (
 	github.com/stretchr/testify v1.8.3
 	golang.org/x/sync v0.2.0
 	google.golang.org/grpc v1.55.0
-	google.golang.org/protobuf v1.30.0
+	google.golang.org/protobuf v1.33.0
 )
 
 require (

go.sum

@@ -38,8 +38,8 @@ google.golang.org/grpc v1.55.0 h1:3Oj82/tFSCeUrRTg/5E/7d/W5A1tj6Ky1ABAuZuv5ag=
 google.golang.org/grpc v1.55.0/go.mod h1:iYEXKGkEBhg1PjZQvoYEVPTDkHo1/bjTnfwTeGONTY8=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.30.0 h1:kPPoIgf3TsEvrm0PFe15JQ+570QVxYzEvvHqChK+cng=
+google.golang.org/protobuf v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGmI=
-google.golang.org/protobuf v1.30.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
+google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

netmap/convert.go

@@ -142,6 +142,8 @@ func (r *Replica) ToGRPCMessage() grpc.Message {
 
 		m.SetSelector(r.selector)
 		m.SetCount(r.count)
+		m.EcDataCount = r.ecDataCount
+		m.EcParityCount = r.ecParityCount
 	}
 
 	return m
@@ -155,6 +157,8 @@ func (r *Replica) FromGRPCMessage(m grpc.Message) error {
 
 	r.selector = v.GetSelector()
 	r.count = v.GetCount()
+	r.ecDataCount = v.GetEcDataCount()
+	r.ecParityCount = v.GetEcParityCount()
 
 	return nil
 }

netmap/marshal.go

@@ -19,8 +19,10 @@ const (
 	attributeSelectorField = 4
 	filterSelectorField    = 5
 
-	countReplicaField    = 1
+	countReplicaField         = 1
-	selectorReplicaField = 2
+	selectorReplicaField      = 2
+	ecDataCountReplicaField   = 3
+	ecParityCountReplicaField = 4
 
 	replicasPolicyField  = 1
 	backupPolicyField    = 2
@@ -134,7 +136,9 @@ func (r *Replica) StableMarshal(buf []byte) []byte {
 	var offset int
 
 	offset += protoutil.UInt32Marshal(countReplicaField, buf[offset:], r.count)
-	protoutil.StringMarshal(selectorReplicaField, buf[offset:], r.selector)
+	offset += protoutil.StringMarshal(selectorReplicaField, buf[offset:], r.selector)
+	offset += protoutil.UInt32Marshal(ecDataCountReplicaField, buf[offset:], r.ecDataCount)
+	protoutil.UInt32Marshal(ecParityCountReplicaField, buf[offset:], r.ecParityCount)
 
 	return buf
 }
@@ -146,6 +150,8 @@ func (r *Replica) StableSize() (size int) {
 
 	size += protoutil.UInt32Size(countReplicaField, r.count)
 	size += protoutil.StringSize(selectorReplicaField, r.selector)
+	size += protoutil.UInt32Size(ecDataCountReplicaField, r.ecDataCount)
+	size += protoutil.UInt32Size(ecParityCountReplicaField, r.ecParityCount)
 
 	return size
 }

netmap/test/generate.go

@@ -81,6 +81,17 @@ func GenerateReplica(empty bool) *netmap.Replica {
 	return m
 }
 
+func GenerateEC(empty bool) *netmap.Replica {
+	m := new(netmap.Replica)
+
+	if !empty {
+		m.SetECDataCount(4)
+		m.SetECParityCount(2)
+	}
+
+	return m
+}
+
 func GenerateReplicas(empty bool) []netmap.Replica {
 	var res []netmap.Replica
 
@@ -88,6 +99,7 @@ func GenerateReplicas(empty bool) []netmap.Replica {
 		res = append(res,
 			*GenerateReplica(false),
 			*GenerateReplica(false),
+			*GenerateEC(false),
 		)
 	}
 

netmap/types.go

@@ -50,6 +50,9 @@ type Selector struct {
 type Replica struct {
 	count    uint32
 	selector string
+
+	ecDataCount   uint32
+	ecParityCount uint32
 }
 
 type Operation uint32
@@ -259,6 +262,30 @@ func (r *Replica) SetCount(count uint32) {
 	r.count = count
 }
 
+func (r *Replica) GetECDataCount() uint32 {
+	if r != nil {
+		return r.ecDataCount
+	}
+
+	return 0
+}
+
+func (r *Replica) SetECDataCount(count uint32) {
+	r.ecDataCount = count
+}
+
+func (r *Replica) GetECParityCount() uint32 {
+	if r != nil {
+		return r.ecParityCount
+	}
+
+	return 0
+}
+
+func (r *Replica) SetECParityCount(count uint32) {
+	r.ecParityCount = count
+}
+
 func (p *PlacementPolicy) GetUnique() bool {
 	if p != nil {
 		return p.unique

object/attributes_test.go

@@ -10,7 +10,7 @@ import (
 func TestSetNotification(t *testing.T) {
 	o := new(Object)
 
-	var ni = NotificationInfo{
+	ni := NotificationInfo{
 		epoch: 10,
 		topic: "test",
 	}

object/convert.go

@@ -262,6 +262,74 @@ func (h *SplitHeader) FromGRPCMessage(m grpc.Message) error {
 	return nil
 }
 
+func (h *ECHeader) ToGRPCMessage() grpc.Message {
+	var m *object.Header_EC
+
+	if h != nil {
+		m = new(object.Header_EC)
+
+		m.Parent = h.Parent.ToGRPCMessage().(*refsGRPC.ObjectID)
+		m.ParentSplitId = h.ParentSplitID
+		m.ParentSplitParentId = h.ParentSplitParentID.ToGRPCMessage().(*refsGRPC.ObjectID)
+		m.ParentAttributes = AttributesToGRPC(h.ParentAttributes)
+		m.Index = h.Index
+		m.Total = h.Total
+		m.Header = h.Header
+		m.HeaderLength = h.HeaderLength
+	}
+
+	return m
+}
+
+func (h *ECHeader) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*object.Header_EC)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	par := v.GetParent()
+	if par == nil {
+		h.Parent = nil
+	} else {
+		if h.Parent == nil {
+			h.Parent = new(refs.ObjectID)
+		}
+
+		err = h.Parent.FromGRPCMessage(par)
+		if err != nil {
+			return err
+		}
+	}
+
+	h.ParentSplitID = v.GetParentSplitId()
+
+	parSplitParentID := v.GetParentSplitParentId()
+	if parSplitParentID == nil {
+		h.ParentSplitParentID = nil
+	} else {
+		if h.ParentSplitParentID == nil {
+			h.ParentSplitParentID = new(refs.ObjectID)
+		}
+
+		err = h.ParentSplitParentID.FromGRPCMessage(parSplitParentID)
+		if err != nil {
+			return err
+		}
+	}
+
+	if h.ParentAttributes, err = AttributesFromGRPC(v.GetParentAttributes()); err != nil {
+		return err
+	}
+
+	h.Index = v.GetIndex()
+	h.Total = v.GetTotal()
+	h.Header = v.GetHeader()
+	h.HeaderLength = v.GetHeaderLength()
+	return nil
+}
+
 func (h *Header) ToGRPCMessage() grpc.Message {
 	var m *object.Header
 
@@ -275,6 +343,7 @@ func (h *Header) ToGRPCMessage() grpc.Message {
 		m.SetContainerId(h.cid.ToGRPCMessage().(*refsGRPC.ContainerID))
 		m.SetSessionToken(h.sessionToken.ToGRPCMessage().(*sessionGRPC.SessionToken))
 		m.SetSplit(h.split.ToGRPCMessage().(*object.Header_Split))
+		m.Ec = h.ec.ToGRPCMessage().(*object.Header_EC)
 		m.SetAttributes(AttributesToGRPC(h.attr))
 		m.SetPayloadLength(h.payloadLen)
 		m.SetCreationEpoch(h.creatEpoch)
@@ -313,6 +382,9 @@ func (h *Header) FromGRPCMessage(m grpc.Message) error {
 	if err := h.fillSplitHeader(v); err != nil {
 		return err
 	}
+	if err := h.fillECHeader(v); err != nil {
+		return err
+	}
 
 	h.attr, err = AttributesFromGRPC(v.GetAttributes())
 	if err != nil {
@@ -417,6 +489,19 @@ func (h *Header) fillSplitHeader(v *object.Header) error {
 	return h.split.FromGRPCMessage(split)
 }
 
+func (h *Header) fillECHeader(v *object.Header) error {
+	ec := v.GetEc()
+	if ec == nil {
+		h.ec = nil
+		return nil
+	}
+
+	if h.ec == nil {
+		h.ec = new(ECHeader)
+	}
+	return h.ec.FromGRPCMessage(ec)
+}
+
 func (h *HeaderWithSignature) ToGRPCMessage() grpc.Message {
 	var m *object.HeaderWithSignature
 
@@ -591,6 +676,73 @@ func (s *SplitInfo) FromGRPCMessage(m grpc.Message) error {
 	return nil
 }
 
+func (s *ECInfo) ToGRPCMessage() grpc.Message {
+	var m *object.ECInfo
+
+	if s != nil {
+		m = new(object.ECInfo)
+
+		if s.Chunks != nil {
+			chunks := make([]*object.ECInfo_Chunk, len(s.Chunks))
+			for i := range chunks {
+				chunks[i] = s.Chunks[i].ToGRPCMessage().(*object.ECInfo_Chunk)
+			}
+			m.Chunks = chunks
+		}
+	}
+
+	return m
+}
+
+func (s *ECInfo) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*object.ECInfo)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	chunks := v.GetChunks()
+	if chunks == nil {
+		s.Chunks = nil
+	} else {
+		s.Chunks = make([]ECChunk, len(chunks))
+		for i := range chunks {
+			if err := s.Chunks[i].FromGRPCMessage(chunks[i]); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func (c *ECChunk) ToGRPCMessage() grpc.Message {
+	var m *object.ECInfo_Chunk
+
+	if c != nil {
+		m = new(object.ECInfo_Chunk)
+
+		m.Total = c.Total
+		m.Index = c.Index
+		m.Id = c.ID.ToGRPCMessage().(*refsGRPC.ObjectID)
+	}
+
+	return m
+}
+
+func (c *ECChunk) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*object.ECInfo_Chunk)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	if err := c.ID.FromGRPCMessage(v.GetId()); err != nil {
+		return err
+	}
+	c.Index = v.Index
+	c.Total = v.Total
+
+	return nil
+}
+
 func (r *GetRequestBody) ToGRPCMessage() grpc.Message {
 	var m *object.GetRequest_Body
 
@@ -771,6 +923,8 @@ func (r *GetResponseBody) ToGRPCMessage() grpc.Message {
 			m.SetChunk(t.ToGRPCMessage().(*object.GetResponse_Body_Chunk))
 		case *SplitInfo:
 			m.SetSplitInfo(t.ToGRPCMessage().(*object.SplitInfo))
+		case *ECInfo:
+			m.SetEcInfo(t.ToGRPCMessage().(*object.ECInfo))
 		default:
 			panic(fmt.Sprintf("unknown get object part %T", t))
 		}
@@ -809,6 +963,12 @@ func (r *GetResponseBody) FromGRPCMessage(m grpc.Message) error {
 			r.objPart = partSplit
 			err = partSplit.FromGRPCMessage(pt.SplitInfo)
 		}
+	case *object.GetResponse_Body_EcInfo:
+		if pt != nil {
+			partEC := new(ECInfo)
+			r.objPart = partEC
+			err = partEC.FromGRPCMessage(pt.EcInfo)
+		}
 	default:
 		err = fmt.Errorf("unknown get object part %T", pt)
 	}
@@ -1348,6 +1508,8 @@ func (r *HeadResponseBody) ToGRPCMessage() grpc.Message {
 			m.SetShortHeader(v.ToGRPCMessage().(*object.ShortHeader))
 		case *SplitInfo:
 			m.SetSplitInfo(v.ToGRPCMessage().(*object.SplitInfo))
+		case *ECInfo:
+			m.SetEcInfo(v.ToGRPCMessage().(*object.ECInfo))
 		default:
 			panic(fmt.Sprintf("unknown head part %T", v))
 		}
@@ -1386,6 +1548,12 @@ func (r *HeadResponseBody) FromGRPCMessage(m grpc.Message) error {
 			r.hdrPart = partSplit
 			err = partSplit.FromGRPCMessage(pt.SplitInfo)
 		}
+	case *object.HeadResponse_Body_EcInfo:
+		if pt != nil {
+			partEC := new(ECInfo)
+			r.hdrPart = partEC
+			err = partEC.FromGRPCMessage(pt.EcInfo)
+		}
 	default:
 		err = fmt.Errorf("unknown head part %T", pt)
 	}
@@ -1817,6 +1985,8 @@ func (r *GetRangeResponseBody) ToGRPCMessage() grpc.Message {
 			m.SetChunk(v.ToGRPCMessage().(*object.GetRangeResponse_Body_Chunk))
 		case *SplitInfo:
 			m.SetSplitInfo(v.ToGRPCMessage().(*object.SplitInfo))
+		case *ECInfo:
+			m.SetEcInfo(v.ToGRPCMessage().(*object.ECInfo))
 		default:
 			panic(fmt.Sprintf("unknown get range part %T", v))
 		}
@@ -1849,6 +2019,12 @@ func (r *GetRangeResponseBody) FromGRPCMessage(m grpc.Message) error {
 			r.rngPart = partSplit
 			err = partSplit.FromGRPCMessage(pt.SplitInfo)
 		}
+	case *object.GetRangeResponse_Body_EcInfo:
+		if pt != nil {
+			partEC := new(ECInfo)
+			r.rngPart = partEC
+			err = partEC.FromGRPCMessage(pt.EcInfo)
+		}
 	default:
 		err = fmt.Errorf("unknown get range part %T", pt)
 	}

object/filters.go

@@ -36,6 +36,9 @@ const (
 
 	// FilterHeaderSplitID is a filter key to "split.splitID" field of the object header.
 	FilterHeaderSplitID = ReservedFilterPrefix + "split.splitID"
+
+	// FilterHeaderECParent is a filter key to "ec.parent" field of the object header.
+	FilterHeaderECParent = ReservedFilterPrefix + "ec.parent"
 )
 
 const (

object/grpc/service.go

@@ -78,6 +78,13 @@ func (m *GetResponse_Body) SetSplitInfo(v *SplitInfo) {
 	}
 }
 
+// SetEcInfo sets part of the object payload.
+func (m *GetResponse_Body) SetEcInfo(v *ECInfo) {
+	m.ObjectPart = &GetResponse_Body_EcInfo{
+		EcInfo: v,
+	}
+}
+
 // SetBody sets body of the response.
 func (m *GetResponse) SetBody(v *GetResponse_Body) {
 	m.Body = v
@@ -275,6 +282,13 @@ func (m *HeadResponse_Body) SetSplitInfo(v *SplitInfo) {
 	}
 }
 
+// SetEcInfo sets meta info about the erasure coded object.
+func (m *HeadResponse_Body) SetEcInfo(v *ECInfo) {
+	m.Head = &HeadResponse_Body_EcInfo{
+		EcInfo: v,
+	}
+}
+
 // SetBody sets body of the response.
 func (m *HeadResponse) SetBody(v *HeadResponse_Body) {
 	m.Body = v
@@ -421,6 +435,13 @@ func (m *GetRangeResponse_Body) SetSplitInfo(v *SplitInfo) {
 	}
 }
 
+// SetEcInfo sets meta info about the erasure-coded object.
+func (m *GetRangeResponse_Body) SetEcInfo(v *ECInfo) {
+	m.RangePart = &GetRangeResponse_Body_EcInfo{
+		EcInfo: v,
+	}
+}
+
 // SetBody sets body of the response.
 func (m *GetRangeResponse) SetBody(v *GetRangeResponse_Body) {
 	m.Body = v

object/json.go

@@ -61,6 +61,22 @@ func (s *SplitInfo) UnmarshalJSON(data []byte) error {
 	return message.UnmarshalJSON(s, data, new(object.SplitInfo))
 }
 
+func (e *ECInfo) MarshalJSON() ([]byte, error) {
+	return message.MarshalJSON(e)
+}
+
+func (e *ECInfo) UnmarshalJSON(data []byte) error {
+	return message.UnmarshalJSON(e, data, new(object.ECInfo))
+}
+
+func (e *ECChunk) MarshalJSON() ([]byte, error) {
+	return message.MarshalJSON(e)
+}
+
+func (e *ECChunk) UnmarshalJSON(data []byte) error {
+	return message.UnmarshalJSON(e, data, new(object.ECInfo_Chunk))
+}
+
 func (f *SearchFilter) MarshalJSON() ([]byte, error) {
 	return message.MarshalJSON(f)
 }

object/marshal.go

@@ -26,6 +26,15 @@ const (
 	splitHdrChildrenField        = 5
 	splitHdrSplitIDField         = 6
 
+	ecHdrParentField         = 1
+	ecHdrIndexField          = 2
+	ecHdrTotalField          = 3
+	ecHdrHeaderLengthField   = 4
+	ecHdrHeaderField         = 5
+	ecHdrParentSplitID       = 6
+	ecHdrParentSplitParentID = 7
+	ecHdrParentAttributes    = 8
+
 	hdrVersionField         = 1
 	hdrContainerIDField     = 2
 	hdrOwnerIDField         = 3
@@ -37,6 +46,7 @@ const (
 	hdrSessionTokenField    = 9
 	hdrAttributesField      = 10
 	hdrSplitField           = 11
+	hdrECField              = 12
 
 	hdrWithSigHeaderField    = 1
 	hdrWithSigSignatureField = 2
@@ -50,6 +60,12 @@ const (
 	splitInfoLastPartField = 2
 	splitInfoLinkField     = 3
 
+	ecInfoChunksField = 1
+
+	ecChunkIDField    = 1
+	ecChunkIndexField = 2
+	ecChunkTotalField = 3
+
 	getReqBodyAddressField = 1
 	getReqBodyRawFlagField = 2
 
@@ -60,6 +76,7 @@ const (
 	getRespBodyInitField      = 1
 	getRespBodyChunkField     = 2
 	getRespBodySplitInfoField = 3
+	getRespBodyECInfoField    = 4
 
 	putReqInitObjectIDField  = 1
 	putReqInitSignatureField = 2
@@ -82,6 +99,7 @@ const (
 	headRespBodyHeaderField      = 1
 	headRespBodyShortHeaderField = 2
 	headRespBodySplitInfoField   = 3
+	headRespBodyECInfoField      = 4
 
 	searchFilterMatchField = 1
 	searchFilterNameField  = 2
@@ -102,6 +120,7 @@ const (
 
 	getRangeRespChunkField     = 1
 	getRangeRespSplitInfoField = 2
+	getRangeRespECInfoField    = 3
 
 	getRangeHashReqBodyAddressField = 1
 	getRangeHashReqBodyRangesField  = 2
@@ -229,6 +248,53 @@ func (h *SplitHeader) Unmarshal(data []byte) error {
 	return message.Unmarshal(h, data, new(object.Header_Split))
 }
 
+func (h *ECHeader) StableMarshal(buf []byte) []byte {
+	if h == nil {
+		return []byte{}
+	}
+
+	if buf == nil {
+		buf = make([]byte, h.StableSize())
+	}
+
+	var offset int
+
+	offset += proto.NestedStructureMarshal(ecHdrParentField, buf[offset:], h.Parent)
+	offset += proto.UInt32Marshal(ecHdrIndexField, buf[offset:], h.Index)
+	offset += proto.UInt32Marshal(ecHdrTotalField, buf[offset:], h.Total)
+	offset += proto.UInt32Marshal(ecHdrHeaderLengthField, buf[offset:], h.HeaderLength)
+	offset += proto.BytesMarshal(ecHdrHeaderField, buf[offset:], h.Header)
+	offset += proto.BytesMarshal(ecHdrParentSplitID, buf[offset:], h.ParentSplitID)
+	offset += proto.NestedStructureMarshal(ecHdrParentSplitParentID, buf[offset:], h.ParentSplitParentID)
+	for i := range h.ParentAttributes {
+		offset += proto.NestedStructureMarshal(ecHdrParentAttributes, buf[offset:], &h.ParentAttributes[i])
+	}
+	return buf
+}
+
+func (h *ECHeader) StableSize() (size int) {
+	if h == nil {
+		return 0
+	}
+
+	size += proto.NestedStructureSize(ecHdrParentField, h.Parent)
+	size += proto.UInt32Size(ecHdrIndexField, h.Index)
+	size += proto.UInt32Size(ecHdrTotalField, h.Total)
+	size += proto.UInt32Size(ecHdrHeaderLengthField, h.HeaderLength)
+	size += proto.BytesSize(ecHdrHeaderField, h.Header)
+	size += proto.BytesSize(ecHdrParentSplitID, h.ParentSplitID)
+	size += proto.NestedStructureSize(ecHdrParentSplitParentID, h.ParentSplitParentID)
+	for i := range h.ParentAttributes {
+		size += proto.NestedStructureSize(ecHdrParentAttributes, &h.ParentAttributes[i])
+	}
+
+	return size
+}
+
+func (h *ECHeader) Unmarshal(data []byte) error {
+	return message.Unmarshal(h, data, new(object.Header_EC))
+}
+
 func (h *Header) StableMarshal(buf []byte) []byte {
 	if h == nil {
 		return []byte{}
@@ -255,6 +321,7 @@ func (h *Header) StableMarshal(buf []byte) []byte {
 	}
 
 	proto.NestedStructureMarshal(hdrSplitField, buf[offset:], h.split)
+	proto.NestedStructureMarshal(hdrECField, buf[offset:], h.ec)
 
 	return buf
 }
@@ -277,6 +344,7 @@ func (h *Header) StableSize() (size int) {
 		size += proto.NestedStructureSize(hdrAttributesField, &h.attr[i])
 	}
 	size += proto.NestedStructureSize(hdrSplitField, h.split)
+	size += proto.NestedStructureSize(hdrECField, h.ec)
 
 	return size
 }
@@ -322,6 +390,14 @@ func (o *Object) StableMarshal(buf []byte) []byte {
 		return []byte{}
 	}
 
+	if o.marshalData != nil {
+		if buf == nil {
+			return o.marshalData
+		}
+		copy(buf, o.marshalData)
+		return buf
+	}
+
 	if buf == nil {
 		buf = make([]byte, o.StableSize())
 	}
@@ -336,6 +412,16 @@ func (o *Object) StableMarshal(buf []byte) []byte {
 	return buf
 }
 
+// SetMarshalData sets marshal data to reduce memory allocations.
+//
+// It is unsafe to modify/copy object data after setting marshal data.
+func (o *Object) SetMarshalData(data []byte) {
+	if o == nil {
+		return
+	}
+	o.marshalData = data
+}
+
 func (o *Object) StableSize() (size int) {
 	if o == nil {
 		return 0
@@ -387,6 +473,74 @@ func (s *SplitInfo) Unmarshal(data []byte) error {
 	return message.Unmarshal(s, data, new(object.SplitInfo))
 }
 
+func (e *ECInfo) StableMarshal(buf []byte) []byte {
+	if e == nil {
+		return []byte{}
+	}
+
+	if buf == nil {
+		buf = make([]byte, e.StableSize())
+	}
+
+	var offset int
+
+	for i := range e.Chunks {
+		offset += proto.NestedStructureMarshal(ecInfoChunksField, buf[offset:], &e.Chunks[i])
+	}
+
+	return buf
+}
+
+func (e *ECInfo) StableSize() (size int) {
+	if e == nil {
+		return 0
+	}
+
+	for i := range e.Chunks {
+		size += proto.NestedStructureSize(ecInfoChunksField, &e.Chunks[i])
+	}
+
+	return size
+}
+
+func (e *ECInfo) Unmarshal(data []byte) error {
+	return message.Unmarshal(e, data, new(object.ECInfo))
+}
+
+func (c *ECChunk) StableMarshal(buf []byte) []byte {
+	if c == nil {
+		return []byte{}
+	}
+
+	if buf == nil {
+		buf = make([]byte, c.StableSize())
+	}
+
+	var offset int
+
+	offset += proto.NestedStructureMarshal(ecChunkIDField, buf[offset:], &c.ID)
+	offset += proto.UInt32Marshal(ecChunkIndexField, buf[offset:], c.Index)
+	proto.UInt32Marshal(ecChunkTotalField, buf[offset:], c.Total)
+
+	return buf
+}
+
+func (c *ECChunk) StableSize() (size int) {
+	if c == nil {
+		return 0
+	}
+
+	size += proto.NestedStructureSize(ecChunkIDField, &c.ID)
+	size += proto.UInt32Size(ecChunkIndexField, c.Index)
+	size += proto.UInt32Size(ecChunkTotalField, c.Total)
+
+	return size
+}
+
+func (c *ECChunk) Unmarshal(data []byte) error {
+	return message.Unmarshal(c, data, new(object.ECInfo_Chunk))
+}
+
 func (r *GetRequestBody) StableMarshal(buf []byte) []byte {
 	if r == nil {
 		return []byte{}
@@ -472,6 +626,8 @@ func (r *GetResponseBody) StableMarshal(buf []byte) []byte {
 		}
 	case *SplitInfo:
 		proto.NestedStructureMarshal(getRespBodySplitInfoField, buf, v)
+	case *ECInfo:
+		proto.NestedStructureMarshal(getRespBodyECInfoField, buf, v)
 	default:
 		panic("unknown one of object get response body type")
 	}
@@ -494,6 +650,8 @@ func (r *GetResponseBody) StableSize() (size int) {
 		}
 	case *SplitInfo:
 		size += proto.NestedStructureSize(getRespBodySplitInfoField, v)
+	case *ECInfo:
+		size += proto.NestedStructureSize(getRespBodyECInfoField, v)
 	default:
 		panic("unknown one of object get response body type")
 	}
@@ -732,6 +890,10 @@ func (r *HeadResponseBody) StableMarshal(buf []byte) []byte {
 		if v != nil {
 			proto.NestedStructureMarshal(headRespBodySplitInfoField, buf, v)
 		}
+	case *ECInfo:
+		if v != nil {
+			proto.NestedStructureMarshal(headRespBodyECInfoField, buf, v)
+		}
 	default:
 		panic("unknown one of object put request body type")
 	}
@@ -758,6 +920,10 @@ func (r *HeadResponseBody) StableSize() (size int) {
 		if v != nil {
 			size += proto.NestedStructureSize(headRespBodySplitInfoField, v)
 		}
+	case *ECInfo:
+		if v != nil {
+			size += proto.NestedStructureSize(headRespBodyECInfoField, v)
+		}
 	default:
 		panic("unknown one of object put request body type")
 	}
@@ -958,6 +1124,10 @@ func (r *GetRangeResponseBody) StableMarshal(buf []byte) []byte {
 		if v != nil {
 			proto.NestedStructureMarshal(getRangeRespSplitInfoField, buf, v)
 		}
+	case *ECInfo:
+		if v != nil {
+			proto.NestedStructureMarshal(getRangeRespECInfoField, buf, v)
+		}
 	default:
 		panic("unknown one of object get range request body type")
 	}
@@ -980,6 +1150,10 @@ func (r *GetRangeResponseBody) StableSize() (size int) {
 		if v != nil {
 			size = proto.NestedStructureSize(getRangeRespSplitInfoField, v)
 		}
+	case *ECInfo:
+		if v != nil {
+			size = proto.NestedStructureSize(getRangeRespECInfoField, v)
+		}
 	default:
 		panic("unknown one of object get range request body type")
 	}
@@ -1071,6 +1245,15 @@ func (r *PutSingleRequestBody) StableMarshal(buf []byte) []byte {
 	if r == nil {
 		return []byte{}
 	}
+
+	if r.marshalData != nil {
+		if buf == nil {
+			return r.marshalData
+		}
+		copy(buf, r.marshalData)
+		return buf
+	}
+
 	if buf == nil {
 		buf = make([]byte, r.StableSize())
 	}
@@ -1082,6 +1265,19 @@ func (r *PutSingleRequestBody) StableMarshal(buf []byte) []byte {
 	return buf
 }
 
+// SetMarshalData sets marshal data to reduce memory allocations.
+//
+// It is unsafe to modify/copy request data after setting marshal data.
+func (r *PutSingleRequestBody) SetMarshalData(data []byte) {
+	if r == nil {
+		return
+	}
+
+	r.marshalData = data
+
+	proto.NestedStructureSetMarshalData(putSingleReqObjectField, r.marshalData, r.object)
+}
+
 func (r *PutSingleRequestBody) StableSize() int {
 	if r == nil {
 		return 0

object/message_test.go

@@ -13,9 +13,12 @@ func TestMessageConvert(t *testing.T) {
 		func(empty bool) message.Message { return objecttest.GenerateShortHeader(empty) },
 		func(empty bool) message.Message { return objecttest.GenerateAttribute(empty) },
 		func(empty bool) message.Message { return objecttest.GenerateSplitHeader(empty) },
-		func(empty bool) message.Message { return objecttest.GenerateHeader(empty) },
+		func(empty bool) message.Message { return objecttest.GenerateHeaderWithSplitHeader(empty) },
+		func(empty bool) message.Message { return objecttest.GenerateHeaderWithECHeader(empty) },
+		func(empty bool) message.Message { return objecttest.GenerateECHeader(empty) },
 		func(empty bool) message.Message { return objecttest.GenerateObject(empty) },
 		func(empty bool) message.Message { return objecttest.GenerateSplitInfo(empty) },
+		func(empty bool) message.Message { return objecttest.GenerateECInfo(empty) },
 		func(empty bool) message.Message { return objecttest.GenerateGetRequestBody(empty) },
 		func(empty bool) message.Message { return objecttest.GenerateGetRequest(empty) },
 		func(empty bool) message.Message { return objecttest.GenerateGetObjectPartInit(empty) },

object/test/generate.go

@@ -68,17 +68,42 @@ func generateSplitHeader(empty, withPar bool) *object.SplitHeader {
 	m.SetParentSignature(refstest.GenerateSignature(empty))
 
 	if withPar {
-		m.SetParentHeader(generateHeader(empty, false))
+		m.SetParentHeader(GenerateHeaderWithSplitHeader(empty))
 	}
 
 	return m
 }
 
-func GenerateHeader(empty bool) *object.Header {
+func GenerateHeaderWithSplitHeader(empty bool) *object.Header {
-	return generateHeader(empty, true)
+	m := generateHeader(empty)
+	m.SetSplit(generateSplitHeader(empty, false))
+	return m
 }
 
-func generateHeader(empty, withSplit bool) *object.Header {
+func GenerateHeaderWithECHeader(empty bool) *object.Header {
+	m := generateHeader(empty)
+	m.SetEC(GenerateECHeader(empty))
+	return m
+}
+
+func GenerateECHeader(empty bool) *object.ECHeader {
+	ech := new(object.ECHeader)
+
+	if !empty {
+		ech.Parent = refstest.GenerateObjectID(empty)
+		ech.ParentSplitID = []byte{1, 2, 3}
+		ech.ParentSplitParentID = refstest.GenerateObjectID(empty)
+		ech.ParentAttributes = GenerateAttributes(empty)
+		ech.Index = 0
+		ech.Total = 2
+		ech.Header = []byte("chunk of ec-encoded parent header")
+		ech.HeaderLength = uint32(2 * len(ech.Header))
+	}
+
+	return ech
+}
+
+func generateHeader(empty bool) *object.Header {
 	m := new(object.Header)
 
 	if !empty {
@@ -95,10 +120,6 @@ func generateHeader(empty, withSplit bool) *object.Header {
 	m.SetHomomorphicHash(refstest.GenerateChecksum(empty))
 	m.SetSessionToken(sessiontest.GenerateSessionToken(empty))
 
-	if withSplit {
-		m.SetSplit(generateSplitHeader(empty, false))
-	}
-
 	return m
 }
 
@@ -106,7 +127,7 @@ func GenerateHeaderWithSignature(empty bool) *object.HeaderWithSignature {
 	m := new(object.HeaderWithSignature)
 
 	m.SetSignature(refstest.GenerateSignature(empty))
-	m.SetHeader(GenerateHeader(empty))
+	m.SetHeader(GenerateHeaderWithSplitHeader(empty))
 
 	return m
 }
@@ -120,7 +141,7 @@ func GenerateObject(empty bool) *object.Object {
 	}
 
 	m.SetSignature(refstest.GenerateSignature(empty))
-	m.SetHeader(GenerateHeader(empty))
+	m.SetHeader(GenerateHeaderWithSplitHeader(empty))
 
 	return m
 }
@@ -137,6 +158,31 @@ func GenerateSplitInfo(empty bool) *object.SplitInfo {
 	return m
 }
 
+func GenerateECInfo(empty bool) *object.ECInfo {
+	m := new(object.ECInfo)
+
+	if !empty {
+		m.Chunks = make([]object.ECChunk, 2)
+		for i := range m.Chunks {
+			m.Chunks[i] = *GenerateECChunk(false)
+		}
+	}
+
+	return m
+}
+
+func GenerateECChunk(empty bool) *object.ECChunk {
+	m := new(object.ECChunk)
+
+	if !empty {
+		m.ID = *refstest.GenerateObjectID(false)
+		m.Index = 4
+		m.Total = 7
+	}
+
+	return m
+}
+
 func GenerateGetRequestBody(empty bool) *object.GetRequestBody {
 	m := new(object.GetRequestBody)
 
@@ -169,7 +215,7 @@ func GenerateGetObjectPartInit(empty bool) *object.GetObjectPartInit {
 	}
 
 	m.SetSignature(refstest.GenerateSignature(empty))
-	m.SetHeader(GenerateHeader(empty))
+	m.SetHeader(GenerateHeaderWithSplitHeader(empty))
 
 	return m
 }
@@ -223,7 +269,7 @@ func GeneratePutObjectPartInit(empty bool) *object.PutObjectPartInit {
 	}
 
 	m.SetSignature(refstest.GenerateSignature(empty))
-	m.SetHeader(GenerateHeader(empty))
+	m.SetHeader(GenerateHeaderWithSplitHeader(empty))
 
 	return m
 }

object/types.go

@@ -39,6 +39,17 @@ type SplitHeader struct {
 	splitID []byte
 }
 
+type ECHeader struct {
+	Parent              *refs.ObjectID
+	ParentSplitID       []byte
+	ParentSplitParentID *refs.ObjectID
+	ParentAttributes    []Attribute
+	Index               uint32
+	Total               uint32
+	Header              []byte
+	HeaderLength        uint32
+}
+
 type Header struct {
 	version *refs.Version
 
@@ -59,6 +70,8 @@ type Header struct {
 	attr []Attribute
 
 	split *SplitHeader
+
+	ec *ECHeader
 }
 
 type HeaderWithSignature struct {
@@ -75,6 +88,9 @@ type Object struct {
 	header *Header
 
 	payload []byte
+
+	// marshalData holds marshaled data, must not be marshaled by StableMarshal
+	marshalData []byte
 }
 
 type SplitInfo struct {
@@ -85,6 +101,16 @@ type SplitInfo struct {
 	link *refs.ObjectID
 }
 
+type ECChunk struct {
+	ID    refs.ObjectID
+	Index uint32
+	Total uint32
+}
+
+type ECInfo struct {
+	Chunks []ECChunk
+}
+
 type GetRequestBody struct {
 	addr *refs.Address
 
@@ -304,6 +330,9 @@ type GetRangeHashResponse struct {
 type PutSingleRequestBody struct {
 	object  *Object
 	copyNum []uint32
+
+	// marshalData holds marshaled data, must not be marshaled by StableMarshal
+	marshalData []byte
 }
 
 type PutSingleRequest struct {
@@ -312,8 +341,7 @@ type PutSingleRequest struct {
 	session.RequestHeaders
 }
 
-type PutSingleResponseBody struct {
+type PutSingleResponseBody struct{}
-}
 
 type PutSingleResponse struct {
 	body *PutSingleResponseBody
@@ -650,6 +678,17 @@ func (h *Header) SetSplit(v *SplitHeader) {
 	h.split = v
 }
 
+func (h *Header) GetEC() *ECHeader {
+	if h != nil {
+		return h.ec
+	}
+	return nil
+}
+
+func (h *Header) SetEC(v *ECHeader) {
+	h.ec = v
+}
+
 func (h *HeaderWithSignature) GetHeader() *Header {
 	if h != nil {
 		return h.header
@@ -1471,3 +1510,9 @@ func (r *PutSingleResponse) GetBody() *PutSingleResponseBody {
 func (r *PutSingleResponse) SetBody(v *PutSingleResponseBody) {
 	r.body = v
 }
+
+func (s *ECInfo) getObjectPart() {}
+
+func (s *ECInfo) getHeaderPart() {}
+
+func (s *ECInfo) getRangePart() {}

refs/convert.go

@@ -196,7 +196,7 @@ func (c *Checksum) ToGRPCMessage() grpc.Message {
 	if c != nil {
 		m = new(refs.Checksum)
 
-		m.SetChecksumType(ChecksumTypeToGRPC(c.typ))
+		m.SetType(ChecksumTypeToGRPC(c.typ))
 		m.SetSum(c.sum)
 	}
 

refs/grpc/types.go

@@ -25,8 +25,8 @@ func (x *Address) SetObjectId(v *ObjectID) {
 	x.ObjectId = v
 }
 
-// SetChecksumType in generic checksum structure.
+// SetType in generic checksum structure.
-func (x *Checksum) SetChecksumType(v ChecksumType) {
+func (x *Checksum) SetType(v ChecksumType) {
 	x.Type = v
 }
 

rpc/apemanager.go

@@ -0,0 +1,60 @@
+package rpc
+
+import (
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/apemanager"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/client"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/common"
+)
+
+const serviceAPEManager = frostfsServiceNamePrefix + "apemanager.APEManagerService"
+
+const (
+	rpcAPEManagerAddChain    = "AddChain"
+	rpcAPEManagerRemoveChain = "RemoveChain"
+	rpcAPEManagerListChains  = "ListChains"
+)
+
+func AddChain(
+	cli *client.Client,
+	req *apemanager.AddChainRequest,
+	opts ...client.CallOption,
+) (*apemanager.AddChainResponse, error) {
+	resp := new(apemanager.AddChainResponse)
+
+	err := client.SendUnary(cli, common.CallMethodInfoUnary(serviceAPEManager, rpcAPEManagerAddChain), req, resp, opts...)
+	if err != nil {
+		return nil, err
+	}
+
+	return resp, nil
+}
+
+func RemoveChain(
+	cli *client.Client,
+	req *apemanager.RemoveChainRequest,
+	opts ...client.CallOption,
+) (*apemanager.RemoveChainResponse, error) {
+	resp := new(apemanager.RemoveChainResponse)
+
+	err := client.SendUnary(cli, common.CallMethodInfoUnary(serviceAPEManager, rpcAPEManagerRemoveChain), req, resp, opts...)
+	if err != nil {
+		return nil, err
+	}
+
+	return resp, nil
+}
+
+func ListChains(
+	cli *client.Client,
+	req *apemanager.ListChainsRequest,
+	opts ...client.CallOption,
+) (*apemanager.ListChainsResponse, error) {
+	resp := new(apemanager.ListChainsResponse)
+
+	err := client.SendUnary(cli, common.CallMethodInfoUnary(serviceAPEManager, rpcAPEManagerListChains), req, resp, opts...)
+	if err != nil {
+		return nil, err
+	}
+
+	return resp, nil
+}

rpc/common.go

@@ -1,3 +1,10 @@
 package rpc
 
-const serviceNamePrefix = "neo.fs.v2."
+const (
+	// serviceNamePrefix is still used in "old" services but should be
+	// considered as deprecated. Since new services use "frostfs" root,
+	// `frostfsServiceNamePrefix` must be used for their rpc interface.
+	serviceNamePrefix = "neo.fs.v2."
+
+	frostfsServiceNamePrefix = "frostfs.v2."
+)

session/convert.go

@@ -383,7 +383,7 @@ func (r *RequestMetaHeader) ToGRPCMessage() grpc.Message {
 		m.SetEpoch(r.epoch)
 		m.SetTtl(r.ttl)
 		m.SetOrigin(r.origin.ToGRPCMessage().(*session.RequestMetaHeader))
-		m.SetNetworkMagic(r.netMagic)
+		m.SetMagicNumber(r.netMagic)
 	}
 
 	return m
@@ -674,7 +674,10 @@ func (c *ObjectSessionContext) ToGRPCMessage() grpc.Message {
 		m = new(session.ObjectSessionContext)
 
 		m.SetVerb(ObjectSessionVerbToGRPCField(c.verb))
-		m.SetTarget(c.cnr.ToGRPCMessage().(*refsGRPC.ContainerID), refs.ObjectIDListToGRPCMessage(c.objs))
+		m.SetTarget(&session.ObjectSessionContext_Target{
+			Container: c.cnr.ToGRPCMessage().(*refsGRPC.ContainerID),
+			Objects:   refs.ObjectIDListToGRPCMessage(c.objs),
+		})
 	}
 
 	return m
@@ -724,9 +727,9 @@ func (t *TokenBody) ToGRPCMessage() grpc.Message {
 		case nil:
 			m.Context = nil
 		case *ObjectSessionContext:
-			m.SetObjectSessionContext(typ.ToGRPCMessage().(*session.ObjectSessionContext))
+			m.SetObject(typ.ToGRPCMessage().(*session.ObjectSessionContext))
 		case *ContainerSessionContext:
-			m.SetContainerSessionContext(typ.ToGRPCMessage().(*session.ContainerSessionContext))
+			m.SetContainer(typ.ToGRPCMessage().(*session.ContainerSessionContext))
 		}
 
 		m.SetOwnerId(t.ownerID.ToGRPCMessage().(*refsGRPC.OwnerID))

session/grpc/types.go

@@ -52,25 +52,22 @@ func (m *SessionToken_Body) SetSessionKey(v []byte) {
 }
 
 // SetObjectAddressContext sets object context of the session token.
-func (m *SessionToken_Body) SetObjectSessionContext(v *ObjectSessionContext) {
+func (m *SessionToken_Body) SetObject(v *ObjectSessionContext) {
 	m.Context = &SessionToken_Body_Object{
 		Object: v,
 	}
 }
 
-// SetContainerSessionContext sets container context of the session token.
+// SetContainer sets container context of the session token.
-func (m *SessionToken_Body) SetContainerSessionContext(v *ContainerSessionContext) {
+func (m *SessionToken_Body) SetContainer(v *ContainerSessionContext) {
 	m.Context = &SessionToken_Body_Container{
 		Container: v,
 	}
 }
 
 // SetTarget specifies objects involved in the object session.
-func (m *ObjectSessionContext) SetTarget(cnr *refs.ContainerID, objs []*refs.ObjectID) {
+func (m *ObjectSessionContext) SetTarget(tgt *ObjectSessionContext_Target) {
-	m.Target = &ObjectSessionContext_Target{
+	m.Target = tgt
-		Container: cnr,
-		Objects:   objs,
-	}
 }
 
 // SetVerb sets type of request for which the token is issued.
@@ -147,8 +144,8 @@ func (m *RequestMetaHeader) GetNetworkMagic() uint64 {
 	return 0
 }
 
-// SetNetworkMagic sets NeoFS network magic.
+// SetMagicNumber sets NeoFS network magic.
-func (m *RequestMetaHeader) SetNetworkMagic(v uint64) {
+func (m *RequestMetaHeader) SetMagicNumber(v uint64) {
 	m.MagicNumber = v
 }
 

session/json.go

@@ -3,7 +3,6 @@ package session
 import (
 	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/message"
 	session "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/session/grpc"
-	"google.golang.org/protobuf/encoding/protojson"
 )
 
 func (c *ObjectSessionContext) MarshalJSON() ([]byte, error) {
@@ -27,13 +26,7 @@ func (t *TokenBody) MarshalJSON() ([]byte, error) {
 }
 
 func (t *TokenBody) UnmarshalJSON(data []byte) error {
-	msg := new(session.SessionToken_Body)
+	return message.UnmarshalJSON(t, data, new(session.SessionToken_Body))
-
-	if err := protojson.Unmarshal(data, msg); err != nil {
-		return err
-	}
-
-	return t.FromGRPCMessage(msg)
 }
 
 func (t *Token) MarshalJSON() ([]byte, error) {
@@ -41,13 +34,7 @@ func (t *Token) MarshalJSON() ([]byte, error) {
 }
 
 func (t *Token) UnmarshalJSON(data []byte) error {
-	msg := new(session.SessionToken)
+	return message.UnmarshalJSON(t, data, new(session.SessionToken))
-
-	if err := protojson.Unmarshal(data, msg); err != nil {
-		return err
-	}
-
-	return t.FromGRPCMessage(msg)
 }
 
 func (x *XHeader) MarshalJSON() ([]byte, error) {
@@ -55,13 +42,7 @@ func (x *XHeader) MarshalJSON() ([]byte, error) {
 }
 
 func (x *XHeader) UnmarshalJSON(data []byte) error {
-	msg := new(session.XHeader)
+	return message.UnmarshalJSON(x, data, new(session.XHeader))
-
-	if err := protojson.Unmarshal(data, msg); err != nil {
-		return err
-	}
-
-	return x.FromGRPCMessage(msg)
 }
 
 func (r *RequestMetaHeader) MarshalJSON() ([]byte, error) {
@@ -69,13 +50,7 @@ func (r *RequestMetaHeader) MarshalJSON() ([]byte, error) {
 }
 
 func (r *RequestMetaHeader) UnmarshalJSON(data []byte) error {
-	msg := new(session.RequestMetaHeader)
+	return message.UnmarshalJSON(r, data, new(session.RequestMetaHeader))
-
-	if err := protojson.Unmarshal(data, msg); err != nil {
-		return err
-	}
-
-	return r.FromGRPCMessage(msg)
 }
 
 func (r *RequestVerificationHeader) MarshalJSON() ([]byte, error) {
@@ -83,13 +58,7 @@ func (r *RequestVerificationHeader) MarshalJSON() ([]byte, error) {
 }
 
 func (r *RequestVerificationHeader) UnmarshalJSON(data []byte) error {
-	msg := new(session.RequestVerificationHeader)
+	return message.UnmarshalJSON(r, data, new(session.RequestVerificationHeader))
-
-	if err := protojson.Unmarshal(data, msg); err != nil {
-		return err
-	}
-
-	return r.FromGRPCMessage(msg)
 }
 
 func (r *ResponseMetaHeader) MarshalJSON() ([]byte, error) {
@@ -97,13 +66,7 @@ func (r *ResponseMetaHeader) MarshalJSON() ([]byte, error) {
 }
 
 func (r *ResponseMetaHeader) UnmarshalJSON(data []byte) error {
-	msg := new(session.ResponseMetaHeader)
+	return message.UnmarshalJSON(r, data, new(session.ResponseMetaHeader))
-
-	if err := protojson.Unmarshal(data, msg); err != nil {
-		return err
-	}
-
-	return r.FromGRPCMessage(msg)
 }
 
 func (r *ResponseVerificationHeader) MarshalJSON() ([]byte, error) {
@@ -111,13 +74,7 @@ func (r *ResponseVerificationHeader) MarshalJSON() ([]byte, error) {
 }
 
 func (r *ResponseVerificationHeader) UnmarshalJSON(data []byte) error {
-	msg := new(session.ResponseVerificationHeader)
+	return message.UnmarshalJSON(r, data, new(session.ResponseVerificationHeader))
-
-	if err := protojson.Unmarshal(data, msg); err != nil {
-		return err
-	}
-
-	return r.FromGRPCMessage(msg)
 }
 
 func (x *ContainerSessionContext) MarshalJSON() ([]byte, error) {

session/marshal.go

@@ -4,7 +4,6 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/message"
 	session "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/session/grpc"
 	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/util/proto"
-	goproto "google.golang.org/protobuf/proto"
 )
 
 const (
@@ -154,12 +153,7 @@ func (x *XHeader) StableSize() (size int) {
 }
 
 func (x *XHeader) Unmarshal(data []byte) error {
-	m := new(session.XHeader)
+	return message.Unmarshal(x, data, new(session.XHeader))
-	if err := goproto.Unmarshal(data, m); err != nil {
-		return err
-	}
-
-	return x.FromGRPCMessage(m)
 }
 
 func (l *TokenLifetime) StableMarshal(buf []byte) []byte {
@@ -193,12 +187,7 @@ func (l *TokenLifetime) StableSize() (size int) {
 }
 
 func (l *TokenLifetime) Unmarshal(data []byte) error {
-	m := new(session.SessionToken_Body_TokenLifetime)
+	return message.Unmarshal(l, data, new(session.SessionToken_Body_TokenLifetime))
-	if err := goproto.Unmarshal(data, m); err != nil {
-		return err
-	}
-
-	return l.FromGRPCMessage(m)
 }
 
 func (c *ObjectSessionContext) StableMarshal(buf []byte) []byte {
@@ -211,7 +200,7 @@ func (c *ObjectSessionContext) StableMarshal(buf []byte) []byte {
 	}
 
 	offset := proto.EnumMarshal(objectCtxVerbField, buf, int32(c.verb))
-	proto.NestedStructureMarshal(objectCtxTargetField, buf[offset:], objectSessionContextTarget{
+	proto.NestedStructureMarshalUnchecked(objectCtxTargetField, buf[offset:], objectSessionContextTarget{
 		cnr:  c.cnr,
 		objs: c.objs,
 	})
@@ -225,7 +214,7 @@ func (c *ObjectSessionContext) StableSize() (size int) {
 	}
 
 	size += proto.EnumSize(objectCtxVerbField, int32(c.verb))
-	size += proto.NestedStructureSize(objectCtxTargetField, objectSessionContextTarget{
+	size += proto.NestedStructureSizeUnchecked(objectCtxTargetField, objectSessionContextTarget{
 		cnr:  c.cnr,
 		objs: c.objs,
 	})
@@ -234,12 +223,7 @@ func (c *ObjectSessionContext) StableSize() (size int) {
 }
 
 func (c *ObjectSessionContext) Unmarshal(data []byte) error {
-	m := new(session.ObjectSessionContext)
+	return message.Unmarshal(c, data, new(session.ObjectSessionContext))
-	if err := goproto.Unmarshal(data, m); err != nil {
-		return err
-	}
-
-	return c.FromGRPCMessage(m)
 }
 
 const (
@@ -338,12 +322,7 @@ func (t *TokenBody) StableSize() (size int) {
 }
 
 func (t *TokenBody) Unmarshal(data []byte) error {
-	m := new(session.SessionToken_Body)
+	return message.Unmarshal(t, data, new(session.SessionToken_Body))
-	if err := goproto.Unmarshal(data, m); err != nil {
-		return err
-	}
-
-	return t.FromGRPCMessage(m)
 }
 
 func (t *Token) StableMarshal(buf []byte) []byte {
@@ -375,12 +354,7 @@ func (t *Token) StableSize() (size int) {
 }
 
 func (t *Token) Unmarshal(data []byte) error {
-	m := new(session.SessionToken)
+	return message.Unmarshal(t, data, new(session.SessionToken))
-	if err := goproto.Unmarshal(data, m); err != nil {
-		return err
-	}
-
-	return t.FromGRPCMessage(m)
 }
 
 func (r *RequestMetaHeader) StableMarshal(buf []byte) []byte {
@@ -435,12 +409,7 @@ func (r *RequestMetaHeader) StableSize() (size int) {
 }
 
 func (r *RequestMetaHeader) Unmarshal(data []byte) error {
-	m := new(session.RequestMetaHeader)
+	return message.Unmarshal(r, data, new(session.RequestMetaHeader))
-	if err := goproto.Unmarshal(data, m); err != nil {
-		return err
-	}
-
-	return r.FromGRPCMessage(m)
 }
 
 func (r *RequestVerificationHeader) StableMarshal(buf []byte) []byte {
@@ -476,12 +445,7 @@ func (r *RequestVerificationHeader) StableSize() (size int) {
 }
 
 func (r *RequestVerificationHeader) Unmarshal(data []byte) error {
-	m := new(session.RequestVerificationHeader)
+	return message.Unmarshal(r, data, new(session.RequestVerificationHeader))
-	if err := goproto.Unmarshal(data, m); err != nil {
-		return err
-	}
-
-	return r.FromGRPCMessage(m)
 }
 
 func (r *ResponseMetaHeader) StableMarshal(buf []byte) []byte {
@@ -532,12 +496,7 @@ func (r *ResponseMetaHeader) StableSize() (size int) {
 }
 
 func (r *ResponseMetaHeader) Unmarshal(data []byte) error {
-	m := new(session.ResponseMetaHeader)
+	return message.Unmarshal(r, data, new(session.ResponseMetaHeader))
-	if err := goproto.Unmarshal(data, m); err != nil {
-		return err
-	}
-
-	return r.FromGRPCMessage(m)
 }
 
 func (r *ResponseVerificationHeader) StableMarshal(buf []byte) []byte {
@@ -573,10 +532,5 @@ func (r *ResponseVerificationHeader) StableSize() (size int) {
 }
 
 func (r *ResponseVerificationHeader) Unmarshal(data []byte) error {
-	m := new(session.ResponseVerificationHeader)
+	return message.Unmarshal(r, data, new(session.ResponseVerificationHeader))
-	if err := goproto.Unmarshal(data, m); err != nil {
-		return err
-	}
-
-	return r.FromGRPCMessage(m)
 }

session/types.go

@@ -632,7 +632,8 @@ func (r *ResponseMetaHeader) SetStatus(v *status.Status) {
 func SetStatus(msg interface {
 	GetMetaHeader() *ResponseMetaHeader
 	SetMetaHeader(*ResponseMetaHeader)
-}, st *status.Status) {
+}, st *status.Status,
+) {
 	meta := msg.GetMetaHeader()
 	if meta == nil {
 		meta = new(ResponseMetaHeader)

session/util.go

@@ -43,7 +43,8 @@ func (c *RequestHeaders) SetVerificationHeader(v *RequestVerificationHeader) {
 func (c *RequestHeaders) ToMessage(m interface {
 	SetMetaHeader(*session.RequestMetaHeader)
 	SetVerifyHeader(*session.RequestVerificationHeader)
-}) {
+},
+) {
 	m.SetMetaHeader(c.metaHeader.ToGRPCMessage().(*session.RequestMetaHeader))
 	m.SetVerifyHeader(c.verifyHeader.ToGRPCMessage().(*session.RequestVerificationHeader))
 }
@@ -51,7 +52,8 @@ func (c *RequestHeaders) ToMessage(m interface {
 func (c *RequestHeaders) FromMessage(m interface {
 	GetMetaHeader() *session.RequestMetaHeader
 	GetVerifyHeader() *session.RequestVerificationHeader
-}) error {
+},
+) error {
 	metaHdr := m.GetMetaHeader()
 	if metaHdr == nil {
 		c.metaHeader = nil
@@ -122,7 +124,8 @@ func (c *ResponseHeaders) SetVerificationHeader(v *ResponseVerificationHeader) {
 func (c *ResponseHeaders) ToMessage(m interface {
 	SetMetaHeader(*session.ResponseMetaHeader)
 	SetVerifyHeader(*session.ResponseVerificationHeader)
-}) {
+},
+) {
 	m.SetMetaHeader(c.metaHeader.ToGRPCMessage().(*session.ResponseMetaHeader))
 	m.SetVerifyHeader(c.verifyHeader.ToGRPCMessage().(*session.ResponseVerificationHeader))
 }
@@ -130,7 +133,8 @@ func (c *ResponseHeaders) ToMessage(m interface {
 func (c *ResponseHeaders) FromMessage(m interface {
 	GetMetaHeader() *session.ResponseMetaHeader
 	GetVerifyHeader() *session.ResponseVerificationHeader
-}) error {
+},
+) error {
 	metaHdr := m.GetMetaHeader()
 	if metaHdr == nil {
 		c.metaHeader = nil

signature/body.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/accounting"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/apemanager"
 	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/container"
 	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/netmap"
 	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
@@ -105,5 +106,19 @@ func serviceMessageBody(req any) stableMarshaler {
 		return v.GetBody()
 	case *netmap.SnapshotResponse:
 		return v.GetBody()
+
+		/* APEManager */
+	case *apemanager.AddChainRequest:
+		return v.GetBody()
+	case *apemanager.AddChainResponse:
+		return v.GetBody()
+	case *apemanager.RemoveChainRequest:
+		return v.GetBody()
+	case *apemanager.RemoveChainResponse:
+		return v.GetBody()
+	case *apemanager.ListChainsRequest:
+		return v.GetBody()
+	case *apemanager.ListChainsResponse:
+		return v.GetBody()
 	}
 }

util/pool/buffer.go

@@ -0,0 +1,54 @@
+package pool
+
+import (
+	"sync"
+)
+
+// Buffer contains a byte slice.
+type Buffer struct {
+	Data []byte
+}
+
+// BufferPool manages a pool of Buffers.
+type BufferPool struct {
+	poolSliceSize uint32 // Size for the buffer slices in the pool.
+	buffersPool   *sync.Pool
+}
+
+// NewBufferPool creates a BufferPool with a specified size.
+func NewBufferPool(poolSliceSize uint32) BufferPool {
+	pool := sync.Pool{
+		New: func() any {
+			return new(Buffer)
+		},
+	}
+	return BufferPool{poolSliceSize: poolSliceSize, buffersPool: &pool}
+}
+
+// Get retrieves a Buffer from the pool or creates a new one if necessary.
+// It ensures the buffer's capacity is at least the specified size.
+func (pool BufferPool) Get(size uint32) *Buffer {
+	result := pool.buffersPool.Get().(*Buffer)
+
+	if cap(result.Data) < int(size) {
+		result.Data = make([]byte, size)
+	} else {
+		result.Data = result.Data[:size]
+	}
+	return result
+}
+
+// Put returns a Buffer to the pool if its capacity does not exceed poolSliceSize.
+func (pool BufferPool) Put(buf *Buffer) {
+	if cap(buf.Data) > int(pool.poolSliceSize) {
+		return
+	}
+
+	buf.Data = buf.Data[:0]
+	pool.buffersPool.Put(buf)
+}
+
+// PoolSliceSize returns the size for buffer slices in the pool.
+func (pool BufferPool) PoolSliceSize() uint32 {
+	return uint32(pool.poolSliceSize)
+}

util/proto/marshal.go

@@ -15,10 +15,16 @@ import (
 )
 
 type (
-	stableMarshaller interface {
+	stableMarshaler interface {
 		StableMarshal([]byte) []byte
 		StableSize() int
 	}
+
+	setMarshalData[T any] interface {
+		SetMarshalData([]byte)
+		StableSize() int
+		~*T
+	}
 )
 
 func BytesMarshal(field int, buf, v []byte) int {
@@ -249,12 +255,21 @@ func VarUIntSize(x uint64) int {
 	return (bits.Len64(x|1) + 6) / 7
 }
 
-func NestedStructureMarshal[T stableMarshaller](field int64, buf []byte, v T) int {
+type ptrStableMarshaler[T any] interface {
-	n := v.StableSize()
+	stableMarshaler
-	if n == 0 {
+	~*T
+}
+
+func NestedStructureMarshal[T any, M ptrStableMarshaler[T]](field int64, buf []byte, v M) int {
+	if v == nil {
 		return 0
 	}
 
+	return NestedStructureMarshalUnchecked(field, buf, v)
+}
+
+func NestedStructureMarshalUnchecked[T stableMarshaler](field int64, buf []byte, v T) int {
+	n := v.StableSize()
 	prefix := protowire.EncodeTag(protowire.Number(field), protowire.BytesType)
 	offset := binary.PutUvarint(buf, prefix)
 	offset += binary.PutUvarint(buf[offset:], uint64(n))
@@ -263,13 +278,42 @@ func NestedStructureMarshal[T stableMarshaller](field int64, buf []byte, v T) in
 	return offset + n
 }
 
-func NestedStructureSize[T stableMarshaller](field int64, v T) (size int) {
+// NestedStructureSetMarshalData calculates offset for field in parentData
-	n := v.StableSize()
+// and calls SetMarshalData for nested structure.
-	if n == 0 {
+//
+// Returns marshalled data length of nested structure.
+func NestedStructureSetMarshalData[T any, M setMarshalData[T]](field int64, parentData []byte, v M) int {
+	if v == nil {
 		return 0
 	}
-	size = protowire.SizeGroup(protowire.Number(field), protowire.SizeBytes(n))
+
-	return
+	if parentData == nil {
+		v.SetMarshalData(nil)
+		return 0
+	}
+
+	n := v.StableSize()
+	buf := make([]byte, binary.MaxVarintLen64)
+	prefix := protowire.EncodeTag(protowire.Number(field), protowire.BytesType)
+	offset := binary.PutUvarint(buf, prefix)
+	offset += binary.PutUvarint(buf, uint64(n))
+
+	v.SetMarshalData(parentData[offset : offset+n])
+
+	return offset + n
+}
+
+func NestedStructureSize[T any, M ptrStableMarshaler[T]](field int64, v M) (size int) {
+	if v == nil {
+		return 0
+	}
+
+	return NestedStructureSizeUnchecked(field, v)
+}
+
+func NestedStructureSizeUnchecked[T stableMarshaler](field int64, v T) int {
+	n := v.StableSize()
+	return protowire.SizeGroup(protowire.Number(field), protowire.SizeBytes(n))
 }
 
 func Fixed64Marshal(field int, buf []byte, v uint64) int {

util/proto/marshal_test.go

@@ -50,9 +50,7 @@ func (s *stablePrimitives) stableMarshal(buf []byte, wrongField bool) ([]byte, e
 		buf = make([]byte, s.stableSize())
 	}
 
-	var (
+	var i, offset, fieldNum int
-		i, offset, fieldNum int
-	)
 
 	fieldNum = 1
 	if wrongField {

util/protogen/main.go

@@ -205,22 +205,22 @@ type marshalerDesc struct {
 var marshalers = map[protoreflect.Kind]marshalerDesc{
 	protoreflect.BoolKind: {Prefix: "Bool"},
 	protoreflect.EnumKind: {Prefix: "Enum"},
-	//protoreflect.Int32Kind:    "",
+	// protoreflect.Int32Kind:    "",
-	//protoreflect.Sint32Kind:   "",
+	// protoreflect.Sint32Kind:   "",
 	protoreflect.Uint32Kind: {Prefix: "UInt32", RepeatedDouble: true},
 	protoreflect.Int64Kind:  {Prefix: "Int64", RepeatedDouble: true},
-	//protoreflect.Sint64Kind:   "",
+	// protoreflect.Sint64Kind:   "",
 	protoreflect.Uint64Kind: {Prefix: "UInt64", RepeatedDouble: true},
-	//protoreflect.Sfixed32Kind: "",
+	// protoreflect.Sfixed32Kind: "",
 	protoreflect.Fixed32Kind: {Prefix: "Fixed32", RepeatedDouble: true},
-	//protoreflect.FloatKind:    "",
+	// protoreflect.FloatKind:    "",
-	//protoreflect.Sfixed64Kind: "",
+	// protoreflect.Sfixed64Kind: "",
 	protoreflect.Fixed64Kind: {Prefix: "Fixed64", RepeatedDouble: true},
 	protoreflect.DoubleKind:  {Prefix: "Float64"},
 	protoreflect.StringKind:  {Prefix: "String"},
 	protoreflect.BytesKind:   {Prefix: "Bytes"},
 	protoreflect.MessageKind: {Prefix: "NestedStructure"},
-	//protoreflect.GroupKind:    "",
+	// protoreflect.GroupKind:    "",
 }
 
 func sortFields(fs []*protogen.Field) []*protogen.Field {

util/signature/buffer.go

@@ -1,33 +0,0 @@
-package signature
-
-import "sync"
-
-const poolSliceMaxSize = 128 * 1024
-
-type buffer struct {
-	data []byte
-}
-
-var buffersPool = sync.Pool{
-	New: func() any {
-		return new(buffer)
-	},
-}
-
-func newBufferFromPool(size int) *buffer {
-	result := buffersPool.Get().(*buffer)
-	if cap(result.data) < size {
-		result.data = make([]byte, size)
-	} else {
-		result.data = result.data[:size]
-	}
-	return result
-}
-
-func returnBufferToPool(buf *buffer) {
-	if cap(buf.data) > poolSliceMaxSize {
-		return
-	}
-	buf.data = buf.data[:0]
-	buffersPool.Put(buf)
-}

util/signature/data.go

@@ -4,9 +4,14 @@ import (
 	"crypto/ecdsa"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/refs"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/util/pool"
 	crypto "git.frostfs.info/TrueCloudLab/frostfs-crypto"
 )
 
+const poolSliceMaxSize = 128 * 1024
+
+var buffersPool = pool.NewBufferPool(poolSliceMaxSize)
+
 type DataSource interface {
 	ReadSignedData([]byte) ([]byte, error)
 	SignedDataSize() int
@@ -35,10 +40,10 @@ func SignDataWithHandler(key *ecdsa.PrivateKey, src DataSource, handler KeySigna
 		opts[i](cfg)
 	}
 
-	buffer := newBufferFromPool(src.SignedDataSize())
+	buffer := buffersPool.Get(uint32(src.SignedDataSize()))
-	defer returnBufferToPool(buffer)
+	defer buffersPool.Put(buffer)
 
-	data, err := src.ReadSignedData(buffer.data)
+	data, err := src.ReadSignedData(buffer.Data)
 	if err != nil {
 		return err
 	}
@@ -64,10 +69,10 @@ func VerifyDataWithSource(dataSrc DataSource, sigSrc KeySignatureSource, opts ..
 		opts[i](cfg)
 	}
 
-	buffer := newBufferFromPool(dataSrc.SignedDataSize())
+	buffer := buffersPool.Get(uint32(dataSrc.SignedDataSize()))
-	defer returnBufferToPool(buffer)
+	defer buffersPool.Put(buffer)
 
-	data, err := dataSrc.ReadSignedData(buffer.data)
+	data, err := dataSrc.ReadSignedData(buffer.Data)
 	if err != nil {
 		return err
 	}

util/signature/options.go

@@ -35,10 +35,10 @@ func verify(cfg *cfg, data []byte, sig *refs.Signature) error {
 	case refs.ECDSA_RFC6979_SHA256:
 		return crypto.VerifyRFC6979(pub, data, sig.GetSign())
 	case refs.ECDSA_RFC6979_SHA256_WALLET_CONNECT:
-		buffer := newBufferFromPool(base64.StdEncoding.EncodedLen(len(data)))
+		buffer := buffersPool.Get(uint32(base64.StdEncoding.EncodedLen(len(data))))
-		defer returnBufferToPool(buffer)
+		defer buffersPool.Put(buffer)
-		base64.StdEncoding.Encode(buffer.data, data)
+		base64.StdEncoding.Encode(buffer.Data, data)
-		if !walletconnect.Verify(pub, buffer.data, sig.GetSign()) {
+		if !walletconnect.Verify(pub, buffer.Data, sig.GetSign()) {
 			return crypto.ErrInvalidSignature
 		}
 		return nil
@@ -54,10 +54,10 @@ func sign(cfg *cfg, key *ecdsa.PrivateKey, data []byte) ([]byte, error) {
 	case refs.ECDSA_RFC6979_SHA256:
 		return crypto.SignRFC6979(key, data)
 	case refs.ECDSA_RFC6979_SHA256_WALLET_CONNECT:
-		buffer := newBufferFromPool(base64.StdEncoding.EncodedLen(len(data)))
+		buffer := buffersPool.Get(uint32(base64.StdEncoding.EncodedLen(len(data))))
-		defer returnBufferToPool(buffer)
+		defer buffersPool.Put(buffer)
-		base64.StdEncoding.Encode(buffer.data, data)
+		base64.StdEncoding.Encode(buffer.Data, data)
-		return walletconnect.Sign(key, buffer.data)
+		return walletconnect.Sign(key, buffer.Data)
 	default:
 		panic(fmt.Sprintf("unsupported scheme %s", cfg.scheme))
 	}

util/signature/walletconnect/sign_test.go

@@ -109,5 +109,4 @@ func TestVerifyNeonWallet(t *testing.T) {
 		}
 		require.True(t, VerifyMessage(nil, sm))
 	}
-
 }