diff --git a/audit/convert.go b/audit/convert.go
deleted file mode 100644
index a8419287..00000000
--- a/audit/convert.go
+++ /dev/null
@@ -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
-}
diff --git a/audit/grpc/types.go b/audit/grpc/types.go
deleted file mode 100644
index 59bb184a..00000000
--- a/audit/grpc/types.go
+++ /dev/null
@@ -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
-}
diff --git a/audit/grpc/types.pb.go b/audit/grpc/types.pb.go
deleted file mode 100644
index 57243ef0..00000000
Binary files a/audit/grpc/types.pb.go and /dev/null differ
diff --git a/audit/json.go b/audit/json.go
deleted file mode 100644
index cbcf41f1..00000000
--- a/audit/json.go
+++ /dev/null
@@ -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))
-}
diff --git a/audit/marshal.go b/audit/marshal.go
deleted file mode 100644
index a039baff..00000000
--- a/audit/marshal.go
+++ /dev/null
@@ -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))
-}
diff --git a/audit/message_test.go b/audit/message_test.go
deleted file mode 100644
index 02c7f786..00000000
--- a/audit/message_test.go
+++ /dev/null
@@ -1,15 +0,0 @@
-package audit_test
-
-import (
-	"testing"
-
-	audittest "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/audit/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) },
-	)
-}
diff --git a/audit/test/generate.go b/audit/test/generate.go
deleted file mode 100644
index 093cbfe5..00000000
--- a/audit/test/generate.go
+++ /dev/null
@@ -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
-}
diff --git a/audit/types.go b/audit/types.go
deleted file mode 100644
index 6f856f08..00000000
--- a/audit/types.go
+++ /dev/null
@@ -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
-}