[#Issue] tmp

Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>

api/data/tree.go

@@ -61,8 +61,6 @@ func (e ExtendedObjectInfo) Version() string {
 // BaseNodeVersion is minimal node info from tree service.
 // Basically used for "system" object.
 type BaseNodeVersion struct {
-	ID             uint64
-	ParenID        uint64
 	OID            oid.ID
 	Timestamp      uint64
 	Size           uint64
@@ -100,9 +98,6 @@ type ObjectTaggingInfo struct {
 
 // MultipartInfo is multipart upload information.
 type MultipartInfo struct {
-	// ID is node id in tree service.
-	// It's ignored when creating a new multipart upload.
-	ID            uint64
 	Key           string
 	UploadID      string
 	Owner         user.ID
@@ -139,8 +134,6 @@ func (p *PartInfo) GetETag(md5Enabled bool) string {
 
 // LockInfo is lock information to create appropriate tree node.
 type LockInfo struct {
-	id uint64
-
 	legalHoldOID oid.ID
 	setLegalHold bool
 
@@ -150,12 +143,8 @@ type LockInfo struct {
 	isCompliance bool
 }
 
-func NewLockInfo(id uint64) *LockInfo {
-	return &LockInfo{id: id}
-}
-
-func (l LockInfo) ID() uint64 {
-	return l.id
+func NewLockInfo() *LockInfo {
+	return &LockInfo{}
 }
 
 func (l *LockInfo) SetLegalHold(objID oid.ID) {

api/handler/encryption_test.go

@@ -264,6 +264,19 @@ func createMultipartUploadBase(hc *handlerContext, bktName, objName string, encr
 	return w
 }
 
+func abortMultipartUpload(hc *handlerContext, bktName, objName, uploadID string) {
+	w := abortMultipartUploadBase(hc, bktName, objName, uploadID)
+	assertStatus(hc.t, w, http.StatusNoContent)
+}
+
+func abortMultipartUploadBase(hc *handlerContext, bktName, objName, uploadID string) *httptest.ResponseRecorder {
+	query := make(url.Values)
+	query.Set(uploadIDQuery, uploadID)
+	w, r := prepareTestFullRequest(hc, bktName, objName, query, nil)
+	hc.Handler().AbortMultipartUploadHandler(w, r)
+	return w
+}
+
 func completeMultipartUpload(hc *handlerContext, bktName, objName, uploadID string, partsETags []string) {
 	w := completeMultipartUploadBase(hc, bktName, objName, uploadID, partsETags)
 	assertStatus(hc.t, w, http.StatusOK)

api/handler/get_test.go

@@ -197,6 +197,19 @@ func TestGetObject(t *testing.T) {
 	getObjectAssertS3Error(hc, bktName, objName, emptyVersion, errors.ErrNoSuchKey)
 }
 
+func TestGetObjectPiloramaPrefix(t *testing.T) {
+	hc := prepareHandlerContextWithMinCache(t)
+	bktName, objName, objName2 := "bucket", "obj", "obj2"
+	createBucket(hc, bktName)
+
+	hdr := putObjectContent(hc, bktName, objName, "content1")
+	putObjectContent(hc, bktName, objName2, "content2")
+
+	w := headObjectBase(hc, bktName, objName, emptyVersion)
+	assertStatus(t, w, http.StatusOK)
+	require.Equal(t, hdr.Get(api.ETag), w.Header().Get(api.ETag))
+}
+
 func TestGetObjectEnabledMD5(t *testing.T) {
 	hc := prepareHandlerContext(t)
 	bktName, objName := "bucket", "obj"

api/handler/multipart_upload_test.go

@@ -98,7 +98,7 @@ func TestMultipartReUploadPart(t *testing.T) {
 
 	innerUploadInfo, err := hc.tree.GetMultipartUpload(hc.context, bktInfo, objName, uploadInfo.UploadID)
 	require.NoError(t, err)
-	treeParts, err := hc.tree.GetParts(hc.Context(), bktInfo, innerUploadInfo.ID)
+	treeParts, err := hc.tree.GetParts(hc.Context(), bktInfo, innerUploadInfo)
 	require.NoError(t, err)
 	require.Len(t, treeParts, len(list.Parts))
 
@@ -264,6 +264,25 @@ func TestMultipartUploadSize(t *testing.T) {
 	})
 }
 
+func TestMultipartUploadNewPilorama(t *testing.T) {
+	hc := prepareHandlerContext(t)
+
+	bktName, objName := "bucket-for-test-list-parts", "object-multipart"
+	bktInfo := createBucket(hc, bktName)
+
+	partSize := 1024
+	uploadInfo := createMultipartUpload(hc, bktName, objName, map[string]string{})
+	uploadPart(hc, bktName, objName, uploadInfo.UploadID, 1, partSize)
+	uploadPart(hc, bktName, objName, uploadInfo.UploadID, 2, partSize)
+
+	abortMultipartUpload(hc, bktName, objName, uploadInfo.UploadID)
+
+	require.Len(t, hc.tp.Objects(), 0)
+	parts, err := hc.tree.GetParts(hc.Context(), bktInfo.BktInfo, &data.MultipartInfo{Key: objName, UploadID: uploadInfo.UploadID})
+	require.NoError(t, err)
+	require.Len(t, parts, 0)
+}
+
 func TestListParts(t *testing.T) {
 	hc := prepareHandlerContext(t)
 

api/handler/object_list_test.go

@@ -94,13 +94,10 @@ func TestListObjectsWithOldTreeNodes(t *testing.T) {
 }
 
 func makeAllTreeObjectsOld(hc *handlerContext, bktInfo *data.BucketInfo) {
-	nodes, err := hc.treeMock.GetSubTree(hc.Context(), bktInfo, "version", 0, 0)
+	nodes, err := hc.treeMock.BurnedList(hc.Context(), bktInfo, "version", "")
 	require.NoError(hc.t, err)
 
 	for _, node := range nodes {
-		if node.GetNodeID() == 0 {
-			continue
-		}
 		meta := make(map[string]string, len(node.GetMeta()))
 		for _, m := range node.GetMeta() {
 			if m.GetKey() != "Created" && m.GetKey() != "Owner" {
@@ -108,7 +105,7 @@ func makeAllTreeObjectsOld(hc *handlerContext, bktInfo *data.BucketInfo) {
 			}
 		}
 
-		err = hc.treeMock.MoveNode(hc.Context(), bktInfo, "version", node.GetNodeID(), node.GetParentID(), meta)
+		err = hc.treeMock.BurnedAdd(hc.Context(), bktInfo, "version", node.GetKey(), meta)
 		require.NoError(hc.t, err)
 	}
 }

api/handler/util.go

@@ -15,6 +15,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
 	frosterrors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/frostfs/errors"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/pkg/service/tree"
 	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/session"
 	"go.opentelemetry.io/otel/trace"
@@ -68,11 +69,12 @@ func transformToS3Error(err error) error {
 	}
 
 	if errors.Is(err, layer.ErrAccessDenied) ||
-		errors.Is(err, layer.ErrNodeAccessDenied) {
+		errors.Is(err, tree.ErrNodeAccessDenied) {
 		return s3errors.GetAPIError(s3errors.ErrAccessDenied)
 	}
 
-	if errors.Is(err, layer.ErrGatewayTimeout) {
+	if errors.Is(err, layer.ErrGatewayTimeout) ||
+		errors.Is(err, tree.ErrGatewayTimeout) {
 		return s3errors.GetAPIError(s3errors.ErrGatewayTimeout)
 	}
 

api/handler/util_test.go

@@ -7,6 +7,7 @@ import (
 
 	s3errors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/pkg/service/tree"
 	"github.com/stretchr/testify/require"
 )
 
@@ -33,7 +34,7 @@ func TestTransformS3Errors(t *testing.T) {
 		},
 		{
 			name:     "layer node access denied error to s3 access denied error",
-			err:      layer.ErrNodeAccessDenied,
+			err:      tree.ErrNodeAccessDenied,
 			expected: s3errors.ErrAccessDenied,
 		},
 		{

api/layer/compound.go

@@ -7,6 +7,7 @@ import (
 
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
 	s3errors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/pkg/service/tree"
 )
 
 func (n *layer) GetObjectTaggingAndLock(ctx context.Context, objVersion *data.ObjectVersion, nodeVersion *data.NodeVersion) (map[string]string, data.LockInfo, error) {
@@ -29,7 +30,7 @@ func (n *layer) GetObjectTaggingAndLock(ctx context.Context, objVersion *data.Ob
 
 	tags, lockInfo, err = n.treeService.GetObjectTaggingAndLock(ctx, objVersion.BktInfo, nodeVersion)
 	if err != nil {
-		if errors.Is(err, ErrNodeNotFound) {
+		if errors.Is(err, tree.ErrNodeNotFound) {
 			return nil, data.LockInfo{}, fmt.Errorf("%w: %s", s3errors.GetAPIError(s3errors.ErrNoSuchKey), err.Error())
 		}
 		return nil, data.LockInfo{}, err

api/layer/cors.go

@@ -10,6 +10,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/pkg/service/tree"
 	"go.uber.org/zap"
 )
 
@@ -50,7 +51,7 @@ func (n *layer) PutBucketCORS(ctx context.Context, p *PutCORSParams) error {
 	}
 
 	objIDToDelete, err := n.treeService.PutBucketCORS(ctx, p.BktInfo, objID)
-	objIDToDeleteNotFound := errorsStd.Is(err, ErrNoNodeToRemove)
+	objIDToDeleteNotFound := errorsStd.Is(err, tree.ErrNoNodeToRemove)
 	if err != nil && !objIDToDeleteNotFound {
 		return err
 	}
@@ -71,7 +72,7 @@ func (n *layer) PutBucketCORS(ctx context.Context, p *PutCORSParams) error {
 func (n *layer) GetBucketCORS(ctx context.Context, bktInfo *data.BucketInfo) (*data.CORSConfiguration, error) {
 	cors, err := n.getCORS(ctx, bktInfo)
 	if err != nil {
-		if errorsStd.Is(err, ErrNodeNotFound) {
+		if errorsStd.Is(err, tree.ErrNodeNotFound) {
 			return nil, fmt.Errorf("%w: %s", errors.GetAPIError(errors.ErrNoSuchCORSConfiguration), err.Error())
 		}
 		return nil, err
@@ -82,7 +83,7 @@ func (n *layer) GetBucketCORS(ctx context.Context, bktInfo *data.BucketInfo) (*d
 
 func (n *layer) DeleteBucketCORS(ctx context.Context, bktInfo *data.BucketInfo) error {
 	objID, err := n.treeService.DeleteBucketCORS(ctx, bktInfo)
-	objIDNotFound := errorsStd.Is(err, ErrNoNodeToRemove)
+	objIDNotFound := errorsStd.Is(err, tree.ErrNoNodeToRemove)
 	if err != nil && !objIDNotFound {
 		return err
 	}

api/layer/layer.go

@@ -19,6 +19,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/encryption"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/pkg/service/tree"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/bearer"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client"
 	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
@@ -63,7 +64,7 @@ type (
 		resolver    BucketResolver
 		ncontroller EventListener
 		cache       *Cache
-		treeService TreeService
+		treeService *tree.Tree
 		features    FeatureSettings
 	}
 
@@ -73,7 +74,7 @@ type (
 		Cache        *Cache
 		AnonKey      AnonymousKey
 		Resolver     BucketResolver
-		TreeService  TreeService
+		TreeService  *tree.Tree
 		Features     FeatureSettings
 	}
 
@@ -658,10 +659,10 @@ func (n *layer) deleteObject(ctx context.Context, bkt *data.BucketInfo, settings
 		}
 
 		if obj.DeleteMarkVersion, obj.Error = n.removeOldVersion(ctx, bkt, nodeVersion, obj); obj.Error != nil {
-			return n.handleObjectDeleteErrors(ctx, bkt, obj, nodeVersion.ID)
+			return n.handleObjectDeleteErrors(ctx, bkt, obj, nodeVersion)
 		}
 
-		obj.Error = n.treeService.RemoveVersion(ctx, bkt, nodeVersion.ID)
+		obj.Error = n.treeService.RemoveVersion(ctx, bkt, nodeVersion)
 		n.cache.CleanListCacheEntriesContainingObject(obj.Name, bkt.CID)
 		return obj
 	}
@@ -688,7 +689,7 @@ func (n *layer) deleteObject(ctx context.Context, bkt *data.BucketInfo, settings
 
 		if nullVersionToDelete != nil {
 			if obj.DeleteMarkVersion, obj.Error = n.removeOldVersion(ctx, bkt, nullVersionToDelete, obj); obj.Error != nil {
-				return n.handleObjectDeleteErrors(ctx, bkt, obj, nullVersionToDelete.ID)
+				return n.handleObjectDeleteErrors(ctx, bkt, obj, nullVersionToDelete)
 			}
 		}
 	}
@@ -717,7 +718,7 @@ func (n *layer) deleteObject(ctx context.Context, bkt *data.BucketInfo, settings
 		IsUnversioned: settings.VersioningSuspended(),
 	}
 
-	if _, obj.Error = n.treeService.AddVersion(ctx, bkt, newVersion); obj.Error != nil {
+	if obj.Error = n.treeService.AddVersion(ctx, bkt, newVersion); obj.Error != nil {
 		return obj
 	}
 
@@ -736,7 +737,7 @@ func (n *layer) handleNotFoundError(bkt *data.BucketInfo, obj *VersionedObject)
 	return obj
 }
 
-func (n *layer) handleObjectDeleteErrors(ctx context.Context, bkt *data.BucketInfo, obj *VersionedObject, nodeID uint64) *VersionedObject {
+func (n *layer) handleObjectDeleteErrors(ctx context.Context, bkt *data.BucketInfo, obj *VersionedObject, nodeVersion *data.NodeVersion) *VersionedObject {
 	if !client.IsErrObjectAlreadyRemoved(obj.Error) && !client.IsErrObjectNotFound(obj.Error) {
 		return obj
 	}
@@ -744,7 +745,7 @@ func (n *layer) handleObjectDeleteErrors(ctx context.Context, bkt *data.BucketIn
 	n.reqLogger(ctx).Debug(logs.CouldntDeleteObjectFromStorageContinueDeleting,
 		zap.Stringer("cid", bkt.CID), zap.String("oid", obj.VersionID), zap.Error(obj.Error))
 
-	obj.Error = n.treeService.RemoveVersion(ctx, bkt, nodeID)
+	obj.Error = n.treeService.RemoveVersion(ctx, bkt, nodeVersion)
 	if obj.Error == nil {
 		n.cache.DeleteObjectName(bkt.CID, bkt.Name, obj.Name)
 	}

api/layer/listing.go

@@ -142,7 +142,7 @@ func (n *layer) ListObjectsV2(ctx context.Context, p *ListObjectsParamsV2) (*Lis
 		ListType: ListObjectsV2Type,
 	}
 
-	objects, next, err := n.getLatestObjectsVersions(ctx, prm)
+	objects, next, err := n.getLatestObjectsVersionsNew(ctx, prm)
 	if err != nil {
 		return nil, err
 	}
@@ -225,6 +225,57 @@ func (n *layer) getLatestObjectsVersions(ctx context.Context, p commonLatestVers
 	return
 }
 
+func (n *layer) getLatestObjectsVersionsNew(ctx context.Context, p commonLatestVersionsListingParams) (objects []*data.ExtendedNodeVersion, next *data.ExtendedNodeVersion, err error) {
+	if p.MaxKeys == 0 {
+		return nil, nil, nil
+	}
+
+	owner := n.BearerOwner(ctx)
+	cacheKey := cache.CreateListSessionCacheKey(p.BktInfo.CID, p.Prefix, p.Bookmark)
+	session := n.cache.GetListSession(owner, cacheKey)
+	if session == nil {
+		session = &data.ListSession{NamesMap: make(map[string]struct{})}
+		session.Stream, err = n.treeService.InitVersionsByPrefixStream(ctx, p.BktInfo, p.Prefix, "", true)
+		if err != nil {
+			return nil, nil, err
+		}
+	} else {
+		session.Stream, err = n.treeService.InitVersionsByPrefixStream(ctx, p.BktInfo, p.Prefix, session.Next[0].Name(), true)
+		if err != nil {
+			return nil, nil, err
+		}
+	}
+
+	session.Context, session.Cancel = context.WithCancel(ctx)
+
+	generator, errorCh := nodesGeneratorStream(ctx, p.commonVersionsListingParams, session)
+	objOutCh, err := n.initWorkerPool(ctx, 2, p.commonVersionsListingParams, generator)
+	if err != nil {
+		return nil, nil, fmt.Errorf("failed to init worker pool: %w", err)
+	}
+
+	objects = make([]*data.ExtendedNodeVersion, 0, p.MaxKeys+1)
+	objects = append(objects, session.Next...)
+	for obj := range objOutCh {
+		objects = append(objects, obj)
+	}
+
+	if err = <-errorCh; err != nil {
+		return nil, nil, fmt.Errorf("failed to get next object from stream: %w", err)
+	}
+
+	sort.Slice(objects, func(i, j int) bool { return objects[i].NodeVersion.FilePath < objects[j].NodeVersion.FilePath })
+
+	if len(objects) > p.MaxKeys {
+		next = objects[p.MaxKeys]
+		session.Stream = nil
+		n.putListLatestVersionsSession(ctx, p, session, objects)
+		objects = objects[:p.MaxKeys]
+	}
+
+	return
+}
+
 func (n *layer) getAllObjectsVersions(ctx context.Context, p commonVersionsListingParams) ([]*data.ExtendedNodeVersion, bool, error) {
 	if p.MaxKeys == 0 {
 		return nil, false, nil
@@ -337,7 +388,7 @@ func (n *layer) initNewVersionsByPrefixSession(ctx context.Context, p commonVers
 		session.Context = middleware.SetBox(session.Context, &middleware.Box{AccessBox: bd})
 	}
 
-	session.Stream, err = n.treeService.InitVersionsByPrefixStream(session.Context, p.BktInfo, p.Prefix, latestOnly)
+	session.Stream, err = n.treeService.InitVersionsByPrefixStream(session.Context, p.BktInfo, p.Prefix, "", latestOnly)
 	if err != nil {
 		return nil, err
 	}

api/layer/multipart_upload.go

@@ -20,6 +20,7 @@ import (
 	s3errors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/encryption"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/pkg/service/tree"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
 	"github.com/minio/sio"
@@ -188,7 +189,7 @@ func (n *layer) CreateMultipartUpload(ctx context.Context, p *CreateMultipartPar
 func (n *layer) UploadPart(ctx context.Context, p *UploadPartParams) (string, error) {
 	multipartInfo, err := n.treeService.GetMultipartUpload(ctx, p.Info.Bkt, p.Info.Key, p.Info.UploadID)
 	if err != nil {
-		if errors.Is(err, ErrNodeNotFound) {
+		if errors.Is(err, tree.ErrNodeNotFound) {
 			return "", fmt.Errorf("%w: %s", s3errors.GetAPIError(s3errors.ErrNoSuchUpload), err.Error())
 		}
 		return "", err
@@ -291,8 +292,8 @@ func (n *layer) uploadPart(ctx context.Context, multipartInfo *data.MultipartInf
 		MD5:      hex.EncodeToString(md5Hash),
 	}
 
-	oldPartID, err := n.treeService.AddPart(ctx, bktInfo, multipartInfo.ID, partInfo)
-	oldPartIDNotFound := errors.Is(err, ErrNoNodeToRemove)
+	oldPartID, err := n.treeService.AddPart(ctx, bktInfo, partInfo)
+	oldPartIDNotFound := errors.Is(err, tree.ErrNoNodeToRemove)
 	if err != nil && !oldPartIDNotFound {
 		return nil, err
 	}
@@ -322,7 +323,7 @@ func (n *layer) uploadPart(ctx context.Context, multipartInfo *data.MultipartInf
 func (n *layer) UploadPartCopy(ctx context.Context, p *UploadCopyParams) (*data.ObjectInfo, error) {
 	multipartInfo, err := n.treeService.GetMultipartUpload(ctx, p.Info.Bkt, p.Info.Key, p.Info.UploadID)
 	if err != nil {
-		if errors.Is(err, ErrNodeNotFound) {
+		if errors.Is(err, tree.ErrNodeNotFound) {
 			return nil, fmt.Errorf("%w: %s", s3errors.GetAPIError(s3errors.ErrNoSuchUpload), err.Error())
 		}
 		return nil, err
@@ -625,13 +626,13 @@ func (n *layer) ListParts(ctx context.Context, p *ListPartsParams) (*ListPartsIn
 func (n *layer) getUploadParts(ctx context.Context, p *UploadInfoParams) (*data.MultipartInfo, map[int]*data.PartInfo, error) {
 	multipartInfo, err := n.treeService.GetMultipartUpload(ctx, p.Bkt, p.Key, p.UploadID)
 	if err != nil {
-		if errors.Is(err, ErrNodeNotFound) {
+		if errors.Is(err, tree.ErrNodeNotFound) {
 			return nil, nil, fmt.Errorf("%w: %s", s3errors.GetAPIError(s3errors.ErrNoSuchUpload), err.Error())
 		}
 		return nil, nil, err
 	}
 
-	parts, err := n.treeService.GetParts(ctx, p.Bkt, multipartInfo.ID)
+	parts, err := n.treeService.GetParts(ctx, p.Bkt, multipartInfo)
 	if err != nil {
 		return nil, nil, err
 	}

api/layer/notifications.go

@@ -10,6 +10,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/pkg/service/tree"
 	"go.uber.org/zap"
 )
 
@@ -40,7 +41,7 @@ func (n *layer) PutBucketNotificationConfiguration(ctx context.Context, p *PutBu
 	}
 
 	objIDToDelete, err := n.treeService.PutNotificationConfigurationNode(ctx, p.BktInfo, objID)
-	objIDToDeleteNotFound := errorsStd.Is(err, ErrNoNodeToRemove)
+	objIDToDeleteNotFound := errorsStd.Is(err, tree.ErrNoNodeToRemove)
 	if err != nil && !objIDToDeleteNotFound {
 		return err
 	}
@@ -65,7 +66,7 @@ func (n *layer) GetBucketNotificationConfiguration(ctx context.Context, bktInfo
 	}
 
 	objID, err := n.treeService.GetNotificationConfigurationNode(ctx, bktInfo)
-	objIDNotFound := errorsStd.Is(err, ErrNodeNotFound)
+	objIDNotFound := errorsStd.Is(err, tree.ErrNodeNotFound)
 	if err != nil && !objIDNotFound {
 		return nil, err
 	}

api/layer/object.go

@@ -21,6 +21,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
 	apiErrors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/pkg/service/tree"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client"
 	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
@@ -315,7 +316,7 @@ func (n *layer) PutObject(ctx context.Context, p *PutObjectParams) (*data.Extend
 		newVersion.MD5 = hex.EncodeToString(md5Hash)
 	}
 
-	if newVersion.ID, err = n.treeService.AddVersion(ctx, p.BktInfo, newVersion); err != nil {
+	if err = n.treeService.AddVersion(ctx, p.BktInfo, newVersion); err != nil {
 		return nil, fmt.Errorf("couldn't add new verion to tree service: %w", err)
 	}
 
@@ -371,7 +372,7 @@ func (n *layer) headLastVersionIfNotDeleted(ctx context.Context, bkt *data.Bucke
 
 	node, err := n.treeService.GetLatestVersion(ctx, bkt, objectName)
 	if err != nil {
-		if errors.Is(err, ErrNodeNotFound) {
+		if errors.Is(err, tree.ErrNodeNotFound) {
 			return nil, fmt.Errorf("%w: %s", apiErrors.GetAPIError(apiErrors.ErrNoSuchKey), err.Error())
 		}
 		return nil, err
@@ -407,7 +408,7 @@ func (n *layer) headVersion(ctx context.Context, bkt *data.BucketInfo, p *HeadOb
 	if p.VersionID == data.UnversionedObjectVersionID {
 		foundVersion, err = n.treeService.GetUnversioned(ctx, bkt, p.Object)
 		if err != nil {
-			if errors.Is(err, ErrNodeNotFound) {
+			if errors.Is(err, tree.ErrNodeNotFound) {
 				return nil, fmt.Errorf("%w: %s", apiErrors.GetAPIError(apiErrors.ErrNoSuchVersion), err.Error())
 			}
 			return nil, err

api/layer/system_object.go

@@ -12,6 +12,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/pkg/service/tree"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
 )
 
@@ -38,8 +39,8 @@ func (n *layer) PutLockInfo(ctx context.Context, p *PutLockInfoParams) (err erro
 		}
 	}
 
-	lockInfo, err := n.treeService.GetLock(ctx, p.ObjVersion.BktInfo, versionNode.ID)
-	if err != nil && !errorsStd.Is(err, ErrNodeNotFound) {
+	lockInfo, err := n.treeService.GetLock(ctx, p.ObjVersion.BktInfo, versionNode)
+	if err != nil && !errorsStd.Is(err, tree.ErrNodeNotFound) {
 		return err
 	}
 
@@ -91,7 +92,7 @@ func (n *layer) PutLockInfo(ctx context.Context, p *PutLockInfoParams) (err erro
 		}
 	}
 
-	if err = n.treeService.PutLock(ctx, p.ObjVersion.BktInfo, versionNode.ID, lockInfo); err != nil {
+	if err = n.treeService.PutLock(ctx, p.ObjVersion.BktInfo, versionNode, lockInfo); err != nil {
 		return fmt.Errorf("couldn't put lock into tree: %w", err)
 	}
 
@@ -140,8 +141,8 @@ func (n *layer) GetLockInfo(ctx context.Context, objVersion *data.ObjectVersion)
 		return nil, err
 	}
 
-	lockInfo, err := n.treeService.GetLock(ctx, objVersion.BktInfo, versionNode.ID)
-	if err != nil && !errorsStd.Is(err, ErrNodeNotFound) {
+	lockInfo, err := n.treeService.GetLock(ctx, objVersion.BktInfo, versionNode)
+	if err != nil && !errorsStd.Is(err, tree.ErrNodeNotFound) {
 		return nil, err
 	}
 	if lockInfo == nil {
@@ -160,7 +161,7 @@ func (n *layer) getCORS(ctx context.Context, bkt *data.BucketInfo) (*data.CORSCo
 	}
 
 	objID, err := n.treeService.GetBucketCORS(ctx, bkt)
-	objIDNotFound := errorsStd.Is(err, ErrNodeNotFound)
+	objIDNotFound := errorsStd.Is(err, tree.ErrNodeNotFound)
 	if err != nil && !objIDNotFound {
 		return nil, err
 	}
@@ -198,7 +199,7 @@ func (n *layer) GetBucketSettings(ctx context.Context, bktInfo *data.BucketInfo)
 
 	settings, err := n.treeService.GetSettingsNode(ctx, bktInfo)
 	if err != nil {
-		if !errorsStd.Is(err, ErrNodeNotFound) {
+		if !errorsStd.Is(err, tree.ErrNodeNotFound) {
 			return nil, err
 		}
 		settings = &data.BucketSettings{Versioning: data.VersioningUnversioned}

api/layer/tagging.go

@@ -8,6 +8,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
 	s3errors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/pkg/service/tree"
 	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
@@ -39,7 +40,7 @@ func (n *layer) GetObjectTagging(ctx context.Context, p *data.GetObjectTaggingPa
 
 	tags, err := n.treeService.GetObjectTagging(ctx, p.ObjectVersion.BktInfo, nodeVersion)
 	if err != nil {
-		if errors.Is(err, ErrNodeNotFound) {
+		if errors.Is(err, tree.ErrNodeNotFound) {
 			return "", nil, fmt.Errorf("%w: %s", s3errors.GetAPIError(s3errors.ErrNoSuchKey), err.Error())
 		}
 		return "", nil, err
@@ -62,7 +63,7 @@ func (n *layer) PutObjectTagging(ctx context.Context, p *data.PutObjectTaggingPa
 
 	err = n.treeService.PutObjectTagging(ctx, p.ObjectVersion.BktInfo, nodeVersion, p.TagSet)
 	if err != nil {
-		if errors.Is(err, ErrNodeNotFound) {
+		if errors.Is(err, tree.ErrNodeNotFound) {
 			return nil, fmt.Errorf("%w: %s", s3errors.GetAPIError(s3errors.ErrNoSuchKey), err.Error())
 		}
 		return nil, err
@@ -81,7 +82,7 @@ func (n *layer) DeleteObjectTagging(ctx context.Context, p *data.ObjectVersion)
 
 	err = n.treeService.DeleteObjectTagging(ctx, p.BktInfo, version)
 	if err != nil {
-		if errors.Is(err, ErrNodeNotFound) {
+		if errors.Is(err, tree.ErrNodeNotFound) {
 			return nil, fmt.Errorf("%w: %s", s3errors.GetAPIError(s3errors.ErrNoSuchKey), err.Error())
 		}
 		return nil, err
@@ -102,7 +103,7 @@ func (n *layer) GetBucketTagging(ctx context.Context, bktInfo *data.BucketInfo)
 	}
 
 	tags, err := n.treeService.GetBucketTagging(ctx, bktInfo)
-	if err != nil && !errors.Is(err, ErrNodeNotFound) {
+	if err != nil && !errors.Is(err, tree.ErrNodeNotFound) {
 		return nil, err
 	}
 
@@ -161,7 +162,7 @@ func (n *layer) getNodeVersion(ctx context.Context, objVersion *data.ObjectVersi
 
 	if err == nil && version.IsDeleteMarker && !objVersion.NoErrorOnDeleteMarker {
 		return nil, fmt.Errorf("%w: found version is delete marker", s3errors.GetAPIError(s3errors.ErrNoSuchKey))
-	} else if errors.Is(err, ErrNodeNotFound) {
+	} else if errors.Is(err, tree.ErrNodeNotFound) {
 		return nil, fmt.Errorf("%w: %s", s3errors.GetAPIError(s3errors.ErrNoSuchKey), err.Error())
 	}
 

api/layer/tree_mock.go

@@ -1,448 +0,0 @@
-package layer
-
-import (
-	"context"
-	"fmt"
-	"io"
-	"sort"
-	"strings"
-
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
-)
-
-type VersionsByPrefixStreamMock struct {
-	result []*data.NodeVersion
-	offset int
-}
-
-func (s *VersionsByPrefixStreamMock) Next(context.Context) (*data.NodeVersion, error) {
-	if s.offset > len(s.result)-1 {
-		return nil, io.EOF
-	}
-
-	res := s.result[s.offset]
-	s.offset++
-	return res, nil
-}
-
-type TreeServiceMock struct {
-	settings   map[string]*data.BucketSettings
-	versions   map[string]map[string][]*data.NodeVersion
-	system     map[string]map[string]*data.BaseNodeVersion
-	locks      map[string]map[uint64]*data.LockInfo
-	tags       map[string]map[uint64]map[string]string
-	multiparts map[string]map[string][]*data.MultipartInfo
-	parts      map[string]map[int]*data.PartInfo
-}
-
-func (t *TreeServiceMock) GetObjectTaggingAndLock(ctx context.Context, bktInfo *data.BucketInfo, objVersion *data.NodeVersion) (map[string]string, *data.LockInfo, error) {
-	// TODO implement object tagging
-	lock, err := t.GetLock(ctx, bktInfo, objVersion.ID)
-	return nil, lock, err
-}
-
-func (t *TreeServiceMock) GetObjectTagging(_ context.Context, bktInfo *data.BucketInfo, nodeVersion *data.NodeVersion) (map[string]string, error) {
-	cnrTagsMap, ok := t.tags[bktInfo.CID.EncodeToString()]
-	if !ok {
-		return nil, nil
-	}
-
-	return cnrTagsMap[nodeVersion.ID], nil
-}
-
-func (t *TreeServiceMock) PutObjectTagging(_ context.Context, bktInfo *data.BucketInfo, nodeVersion *data.NodeVersion, tagSet map[string]string) error {
-	cnrTagsMap, ok := t.tags[bktInfo.CID.EncodeToString()]
-	if !ok {
-		t.tags[bktInfo.CID.EncodeToString()] = map[uint64]map[string]string{
-			nodeVersion.ID: tagSet,
-		}
-		return nil
-	}
-
-	cnrTagsMap[nodeVersion.ID] = tagSet
-
-	return nil
-}
-
-func (t *TreeServiceMock) DeleteObjectTagging(ctx context.Context, bktInfo *data.BucketInfo, objVersion *data.NodeVersion) error {
-	return t.PutObjectTagging(ctx, bktInfo, objVersion, nil)
-}
-
-func (t *TreeServiceMock) GetBucketTagging(context.Context, *data.BucketInfo) (map[string]string, error) {
-	// TODO implement me
-	panic("implement me")
-}
-
-func (t *TreeServiceMock) PutBucketTagging(context.Context, *data.BucketInfo, map[string]string) error {
-	// TODO implement me
-	panic("implement me")
-}
-
-func (t *TreeServiceMock) DeleteBucketTagging(context.Context, *data.BucketInfo) error {
-	// TODO implement me
-	panic("implement me")
-}
-
-func NewTreeService() *TreeServiceMock {
-	return &TreeServiceMock{
-		settings:   make(map[string]*data.BucketSettings),
-		versions:   make(map[string]map[string][]*data.NodeVersion),
-		system:     make(map[string]map[string]*data.BaseNodeVersion),
-		locks:      make(map[string]map[uint64]*data.LockInfo),
-		tags:       make(map[string]map[uint64]map[string]string),
-		multiparts: make(map[string]map[string][]*data.MultipartInfo),
-		parts:      make(map[string]map[int]*data.PartInfo),
-	}
-}
-
-func (t *TreeServiceMock) PutSettingsNode(_ context.Context, bktInfo *data.BucketInfo, settings *data.BucketSettings) error {
-	t.settings[bktInfo.CID.EncodeToString()] = settings
-	return nil
-}
-
-func (t *TreeServiceMock) GetSettingsNode(_ context.Context, bktInfo *data.BucketInfo) (*data.BucketSettings, error) {
-	settings, ok := t.settings[bktInfo.CID.EncodeToString()]
-	if !ok {
-		return nil, ErrNodeNotFound
-	}
-
-	return settings, nil
-}
-
-func (t *TreeServiceMock) GetNotificationConfigurationNode(context.Context, *data.BucketInfo) (oid.ID, error) {
-	panic("implement me")
-}
-
-func (t *TreeServiceMock) PutNotificationConfigurationNode(context.Context, *data.BucketInfo, oid.ID) (oid.ID, error) {
-	panic("implement me")
-}
-
-func (t *TreeServiceMock) GetBucketCORS(_ context.Context, bktInfo *data.BucketInfo) (oid.ID, error) {
-	systemMap, ok := t.system[bktInfo.CID.EncodeToString()]
-	if !ok {
-		return oid.ID{}, nil
-	}
-
-	node, ok := systemMap["cors"]
-	if !ok {
-		return oid.ID{}, nil
-	}
-
-	return node.OID, nil
-}
-
-func (t *TreeServiceMock) PutBucketCORS(_ context.Context, bktInfo *data.BucketInfo, objID oid.ID) (oid.ID, error) {
-	systemMap, ok := t.system[bktInfo.CID.EncodeToString()]
-	if !ok {
-		systemMap = make(map[string]*data.BaseNodeVersion)
-	}
-
-	systemMap["cors"] = &data.BaseNodeVersion{
-		OID: objID,
-	}
-
-	t.system[bktInfo.CID.EncodeToString()] = systemMap
-
-	return oid.ID{}, ErrNoNodeToRemove
-}
-
-func (t *TreeServiceMock) DeleteBucketCORS(context.Context, *data.BucketInfo) (oid.ID, error) {
-	panic("implement me")
-}
-
-func (t *TreeServiceMock) GetVersions(_ context.Context, bktInfo *data.BucketInfo, objectName string) ([]*data.NodeVersion, error) {
-	cnrVersionsMap, ok := t.versions[bktInfo.CID.EncodeToString()]
-	if !ok {
-		return nil, ErrNodeNotFound
-	}
-
-	versions, ok := cnrVersionsMap[objectName]
-	if !ok {
-		return nil, ErrNodeNotFound
-	}
-
-	return versions, nil
-}
-
-func (t *TreeServiceMock) GetLatestVersion(_ context.Context, bktInfo *data.BucketInfo, objectName string) (*data.NodeVersion, error) {
-	cnrVersionsMap, ok := t.versions[bktInfo.CID.EncodeToString()]
-	if !ok {
-		return nil, ErrNodeNotFound
-	}
-
-	versions, ok := cnrVersionsMap[objectName]
-	if !ok {
-		return nil, ErrNodeNotFound
-	}
-
-	sort.Slice(versions, func(i, j int) bool {
-		return versions[i].ID < versions[j].ID
-	})
-
-	if len(versions) != 0 {
-		return versions[len(versions)-1], nil
-	}
-
-	return nil, ErrNodeNotFound
-}
-
-func (t *TreeServiceMock) InitVersionsByPrefixStream(_ context.Context, bktInfo *data.BucketInfo, prefix string, latestOnly bool) (data.VersionsStream, error) {
-	cnrVersionsMap, ok := t.versions[bktInfo.CID.EncodeToString()]
-	if !ok {
-		return nil, ErrNodeNotFound
-	}
-
-	var result []*data.NodeVersion
-
-	for key, versions := range cnrVersionsMap {
-		if !strings.HasPrefix(key, prefix) {
-			continue
-		}
-
-		if !latestOnly {
-			result = append(result, versions...)
-			continue
-		}
-
-		sort.Slice(versions, func(i, j int) bool {
-			return versions[i].ID < versions[j].ID
-		})
-
-		if len(versions) != 0 {
-			result = append(result, versions[len(versions)-1])
-		}
-	}
-
-	return &VersionsByPrefixStreamMock{
-		result: result,
-	}, nil
-}
-
-func (t *TreeServiceMock) GetUnversioned(_ context.Context, bktInfo *data.BucketInfo, objectName string) (*data.NodeVersion, error) {
-	cnrVersionsMap, ok := t.versions[bktInfo.CID.EncodeToString()]
-	if !ok {
-		return nil, ErrNodeNotFound
-	}
-
-	versions, ok := cnrVersionsMap[objectName]
-	if !ok {
-		return nil, ErrNodeNotFound
-	}
-
-	for _, version := range versions {
-		if version.IsUnversioned {
-			return version, nil
-		}
-	}
-
-	return nil, ErrNodeNotFound
-}
-
-func (t *TreeServiceMock) AddVersion(_ context.Context, bktInfo *data.BucketInfo, newVersion *data.NodeVersion) (uint64, error) {
-	cnrVersionsMap, ok := t.versions[bktInfo.CID.EncodeToString()]
-	if !ok {
-		t.versions[bktInfo.CID.EncodeToString()] = map[string][]*data.NodeVersion{
-			newVersion.FilePath: {newVersion},
-		}
-		return newVersion.ID, nil
-	}
-
-	versions, ok := cnrVersionsMap[newVersion.FilePath]
-	if !ok {
-		cnrVersionsMap[newVersion.FilePath] = []*data.NodeVersion{newVersion}
-		return newVersion.ID, nil
-	}
-
-	sort.Slice(versions, func(i, j int) bool {
-		return versions[i].ID < versions[j].ID
-	})
-
-	if len(versions) != 0 {
-		newVersion.ID = versions[len(versions)-1].ID + 1
-		newVersion.Timestamp = versions[len(versions)-1].Timestamp + 1
-	}
-
-	result := versions
-
-	if newVersion.IsUnversioned {
-		result = make([]*data.NodeVersion, 0, len(versions))
-		for _, node := range versions {
-			if !node.IsUnversioned {
-				result = append(result, node)
-			}
-		}
-	}
-
-	cnrVersionsMap[newVersion.FilePath] = append(result, newVersion)
-
-	return newVersion.ID, nil
-}
-
-func (t *TreeServiceMock) RemoveVersion(_ context.Context, bktInfo *data.BucketInfo, nodeID uint64) error {
-	cnrVersionsMap, ok := t.versions[bktInfo.CID.EncodeToString()]
-	if !ok {
-		return ErrNodeNotFound
-	}
-
-	for key, versions := range cnrVersionsMap {
-		for i, node := range versions {
-			if node.ID == nodeID {
-				cnrVersionsMap[key] = append(versions[:i], versions[i+1:]...)
-				return nil
-			}
-		}
-	}
-
-	return ErrNodeNotFound
-}
-
-func (t *TreeServiceMock) GetAllVersionsByPrefix(_ context.Context, bktInfo *data.BucketInfo, prefix string) ([]*data.NodeVersion, error) {
-	cnrVersionsMap, ok := t.versions[bktInfo.CID.EncodeToString()]
-	if !ok {
-		return nil, nil
-	}
-
-	var result []*data.NodeVersion
-	for objName, versions := range cnrVersionsMap {
-		if strings.HasPrefix(objName, prefix) {
-			result = append(result, versions...)
-		}
-	}
-
-	return result, nil
-}
-
-func (t *TreeServiceMock) CreateMultipartUpload(_ context.Context, bktInfo *data.BucketInfo, info *data.MultipartInfo) error {
-	cnrMultipartsMap, ok := t.multiparts[bktInfo.CID.EncodeToString()]
-	if !ok {
-		t.multiparts[bktInfo.CID.EncodeToString()] = map[string][]*data.MultipartInfo{
-			info.Key: {info},
-		}
-		return nil
-	}
-
-	multiparts := cnrMultipartsMap[info.Key]
-	if len(multiparts) != 0 {
-		info.ID = multiparts[len(multiparts)-1].ID + 1
-	}
-	cnrMultipartsMap[info.Key] = append(multiparts, info)
-
-	return nil
-}
-
-func (t *TreeServiceMock) GetMultipartUploadsByPrefix(context.Context, *data.BucketInfo, string) ([]*data.MultipartInfo, error) {
-	panic("implement me")
-}
-
-func (t *TreeServiceMock) GetMultipartUpload(_ context.Context, bktInfo *data.BucketInfo, objectName, uploadID string) (*data.MultipartInfo, error) {
-	cnrMultipartsMap, ok := t.multiparts[bktInfo.CID.EncodeToString()]
-	if !ok {
-		return nil, ErrNodeNotFound
-	}
-
-	multiparts := cnrMultipartsMap[objectName]
-	for _, multipart := range multiparts {
-		if multipart.UploadID == uploadID {
-			return multipart, nil
-		}
-	}
-
-	return nil, ErrNodeNotFound
-}
-
-func (t *TreeServiceMock) AddPart(ctx context.Context, bktInfo *data.BucketInfo, multipartNodeID uint64, info *data.PartInfo) (oldObjIDToDelete oid.ID, err error) {
-	multipartInfo, err := t.GetMultipartUpload(ctx, bktInfo, info.Key, info.UploadID)
-	if err != nil {
-		return oid.ID{}, err
-	}
-
-	if multipartInfo.ID != multipartNodeID {
-		return oid.ID{}, fmt.Errorf("invalid multipart info id")
-	}
-
-	partsMap, ok := t.parts[info.UploadID]
-	if !ok {
-		partsMap = make(map[int]*data.PartInfo)
-	}
-
-	partsMap[info.Number] = info
-
-	t.parts[info.UploadID] = partsMap
-	return oid.ID{}, nil
-}
-
-func (t *TreeServiceMock) GetParts(_ context.Context, bktInfo *data.BucketInfo, multipartNodeID uint64) ([]*data.PartInfo, error) {
-	cnrMultipartsMap := t.multiparts[bktInfo.CID.EncodeToString()]
-
-	var foundMultipart *data.MultipartInfo
-
-LOOP:
-	for _, multiparts := range cnrMultipartsMap {
-		for _, multipart := range multiparts {
-			if multipart.ID == multipartNodeID {
-				foundMultipart = multipart
-				break LOOP
-			}
-		}
-	}
-
-	if foundMultipart == nil {
-		return nil, ErrNodeNotFound
-	}
-
-	partsMap := t.parts[foundMultipart.UploadID]
-	result := make([]*data.PartInfo, 0, len(partsMap))
-	for _, part := range partsMap {
-		result = append(result, part)
-	}
-
-	return result, nil
-}
-
-func (t *TreeServiceMock) DeleteMultipartUpload(_ context.Context, bktInfo *data.BucketInfo, multipartInfo *data.MultipartInfo) error {
-	cnrMultipartsMap := t.multiparts[bktInfo.CID.EncodeToString()]
-
-	var uploadID string
-
-LOOP:
-	for key, multiparts := range cnrMultipartsMap {
-		for i, multipart := range multiparts {
-			if multipart.ID == multipartInfo.ID {
-				uploadID = multipart.UploadID
-				cnrMultipartsMap[key] = append(multiparts[:i], multiparts[i+1:]...)
-				break LOOP
-			}
-		}
-	}
-
-	if uploadID == "" {
-		return ErrNodeNotFound
-	}
-
-	delete(t.parts, uploadID)
-	return nil
-}
-
-func (t *TreeServiceMock) PutLock(_ context.Context, bktInfo *data.BucketInfo, nodeID uint64, lock *data.LockInfo) error {
-	cnrLockMap, ok := t.locks[bktInfo.CID.EncodeToString()]
-	if !ok {
-		t.locks[bktInfo.CID.EncodeToString()] = map[uint64]*data.LockInfo{
-			nodeID: lock,
-		}
-		return nil
-	}
-
-	cnrLockMap[nodeID] = lock
-
-	return nil
-}
-
-func (t *TreeServiceMock) GetLock(_ context.Context, bktInfo *data.BucketInfo, nodeID uint64) (*data.LockInfo, error) {
-	cnrLockMap, ok := t.locks[bktInfo.CID.EncodeToString()]
-	if !ok {
-		return nil, nil
-	}
-
-	return cnrLockMap[nodeID], nil
-}

api/layer/tree_service.go

@@ -1,92 +0,0 @@
-package layer
-
-import (
-	"context"
-	"errors"
-
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
-)
-
-// TreeService provide interface to interact with tree service using s3 data models.
-type TreeService interface {
-	// PutSettingsNode update or create new settings node in tree service.
-	PutSettingsNode(ctx context.Context, bktInfo *data.BucketInfo, settings *data.BucketSettings) error
-
-	// GetSettingsNode retrieves the settings node from the tree service and form data.BucketSettings.
-	//
-	// If tree node is not found returns ErrNodeNotFound error.
-	GetSettingsNode(ctx context.Context, bktInfo *data.BucketInfo) (*data.BucketSettings, error)
-
-	// GetNotificationConfigurationNode gets an object id that corresponds to object with bucket CORS.
-	//
-	// If tree node is not found returns ErrNodeNotFound error.
-	GetNotificationConfigurationNode(ctx context.Context, bktInfo *data.BucketInfo) (oid.ID, error)
-
-	// PutNotificationConfigurationNode puts a node to a system tree
-	// and returns objectID of a previous notif config which must be deleted in FrostFS.
-	//
-	// If object id to remove is not found returns ErrNoNodeToRemove error.
-	PutNotificationConfigurationNode(ctx context.Context, bktInfo *data.BucketInfo, objID oid.ID) (oid.ID, error)
-
-	// GetBucketCORS gets an object id that corresponds to object with bucket CORS.
-	//
-	// If object id is not found returns ErrNodeNotFound error.
-	GetBucketCORS(ctx context.Context, bktInfo *data.BucketInfo) (oid.ID, error)
-
-	// PutBucketCORS puts a node to a system tree and returns objectID of a previous cors config which must be deleted in FrostFS.
-	//
-	// If object id to remove is not found returns ErrNoNodeToRemove error.
-	PutBucketCORS(ctx context.Context, bktInfo *data.BucketInfo, objID oid.ID) (oid.ID, error)
-
-	// DeleteBucketCORS removes a node from a system tree and returns objID which must be deleted in FrostFS.
-	//
-	// If object id to remove is not found returns ErrNoNodeToRemove error.
-	DeleteBucketCORS(ctx context.Context, bktInfo *data.BucketInfo) (oid.ID, error)
-
-	GetObjectTagging(ctx context.Context, bktInfo *data.BucketInfo, objVersion *data.NodeVersion) (map[string]string, error)
-	PutObjectTagging(ctx context.Context, bktInfo *data.BucketInfo, objVersion *data.NodeVersion, tagSet map[string]string) error
-	DeleteObjectTagging(ctx context.Context, bktInfo *data.BucketInfo, objVersion *data.NodeVersion) error
-
-	GetBucketTagging(ctx context.Context, bktInfo *data.BucketInfo) (map[string]string, error)
-	PutBucketTagging(ctx context.Context, bktInfo *data.BucketInfo, tagSet map[string]string) error
-	DeleteBucketTagging(ctx context.Context, bktInfo *data.BucketInfo) error
-
-	GetVersions(ctx context.Context, bktInfo *data.BucketInfo, objectName string) ([]*data.NodeVersion, error)
-	GetLatestVersion(ctx context.Context, bktInfo *data.BucketInfo, objectName string) (*data.NodeVersion, error)
-	InitVersionsByPrefixStream(ctx context.Context, bktInfo *data.BucketInfo, prefix string, latestOnly bool) (data.VersionsStream, error)
-	GetUnversioned(ctx context.Context, bktInfo *data.BucketInfo, objectName string) (*data.NodeVersion, error)
-	AddVersion(ctx context.Context, bktInfo *data.BucketInfo, newVersion *data.NodeVersion) (uint64, error)
-	RemoveVersion(ctx context.Context, bktInfo *data.BucketInfo, nodeID uint64) error
-
-	PutLock(ctx context.Context, bktInfo *data.BucketInfo, nodeID uint64, lock *data.LockInfo) error
-	GetLock(ctx context.Context, bktInfo *data.BucketInfo, nodeID uint64) (*data.LockInfo, error)
-
-	CreateMultipartUpload(ctx context.Context, bktInfo *data.BucketInfo, info *data.MultipartInfo) error
-	DeleteMultipartUpload(ctx context.Context, bktInfo *data.BucketInfo, info *data.MultipartInfo) error
-	GetMultipartUploadsByPrefix(ctx context.Context, bktInfo *data.BucketInfo, prefix string) ([]*data.MultipartInfo, error)
-	GetMultipartUpload(ctx context.Context, bktInfo *data.BucketInfo, objectName, uploadID string) (*data.MultipartInfo, error)
-
-	// AddPart puts a node to a system tree as a child of appropriate multipart upload
-	// and returns objectID of a previous part which must be deleted in FrostFS.
-	//
-	// If object id to remove is not found returns ErrNoNodeToRemove error.
-	AddPart(ctx context.Context, bktInfo *data.BucketInfo, multipartNodeID uint64, info *data.PartInfo) (oldObjIDToDelete oid.ID, err error)
-	GetParts(ctx context.Context, bktInfo *data.BucketInfo, multipartNodeID uint64) ([]*data.PartInfo, error)
-
-	// Compound methods for optimizations
-
-	// GetObjectTaggingAndLock unifies GetObjectTagging and GetLock methods in single tree service invocation.
-	GetObjectTaggingAndLock(ctx context.Context, bktInfo *data.BucketInfo, objVersion *data.NodeVersion) (map[string]string, *data.LockInfo, error)
-}
-
-var (
-	// ErrNodeNotFound is returned from Tree service in case of not found error.
-	ErrNodeNotFound = errors.New("not found")
-
-	// ErrNodeAccessDenied is returned from Tree service in case of access denied error.
-	ErrNodeAccessDenied = errors.New("access denied")
-
-	// ErrNoNodeToRemove is returned from Tree service in case of the lack of node with OID to remove.
-	ErrNoNodeToRemove = errors.New("no node to remove")
-)

api/layer/versioning_test.go

@@ -9,6 +9,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/creds/accessbox"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/pkg/service/tree"
 	bearertest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/bearer/test"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
@@ -167,10 +168,13 @@ func prepareContext(t *testing.T, cachesConfig ...*CachesConfig) *testContext {
 	var owner user.ID
 	user.IDFromKey(&owner, key.PrivateKey.PublicKey)
 
+	memTree, err := tree.NewTreeServiceClientMemory()
+	require.NoError(t, err)
+
 	layerCfg := &Config{
 		Cache:       NewCache(config),
 		AnonKey:     AnonymousKey{Key: key},
-		TreeService: NewTreeService(),
+		TreeService: tree.NewTree(memTree, logger),
 		Features:    &FeatureSettingsMock{},
 		GateOwner:   owner,
 	}

go.mod

@@ -37,6 +37,8 @@ require (
 	google.golang.org/protobuf v1.33.0
 )
 
+replace git.frostfs.info/TrueCloudLab/frostfs-sdk-go => git.frostfs.info/dkirillov/frostfs-sdk-go v0.0.0-20240621142828-0ee3fcc18ffd
+
 require (
 	git.frostfs.info/TrueCloudLab/frostfs-crypto v0.6.0 // indirect
 	git.frostfs.info/TrueCloudLab/hrw v1.2.1 // indirect

go.sum

@@ -44,8 +44,6 @@ git.frostfs.info/TrueCloudLab/frostfs-crypto v0.6.0 h1:FxqFDhQYYgpe41qsIHVOcdzSV
 git.frostfs.info/TrueCloudLab/frostfs-crypto v0.6.0/go.mod h1:RUIKZATQLJ+TaYQa60X2fTDwfuhMfm8Ar60bQ5fr+vU=
 git.frostfs.info/TrueCloudLab/frostfs-observability v0.0.0-20230531082742-c97d21411eb6 h1:aGQ6QaAnTerQ5Dq5b2/f9DUQtSqPkZZ/bkMx/HKuLCo=
 git.frostfs.info/TrueCloudLab/frostfs-observability v0.0.0-20230531082742-c97d21411eb6/go.mod h1:W8Nn08/l6aQ7UlIbpF7FsQou7TVpcRD1ZT1KG4TrFhE=
-git.frostfs.info/TrueCloudLab/frostfs-sdk-go v0.0.0-20240531132048-ebd8fcd1685f h1:vBLC1OSGMSn7lRJv/p1of0veifuBdZdztVrF9Vn+UFk=
-git.frostfs.info/TrueCloudLab/frostfs-sdk-go v0.0.0-20240531132048-ebd8fcd1685f/go.mod h1:4AObM67VUqkXQJlODTFThFnuMGEuK8h9DrAXHDZqvCU=
 git.frostfs.info/TrueCloudLab/hrw v1.2.1 h1:ccBRK21rFvY5R1WotI6LNoPlizk7qSvdfD8lNIRudVc=
 git.frostfs.info/TrueCloudLab/hrw v1.2.1/go.mod h1:C1Ygde2n843yTZEQ0FP69jYiuaYV0kriLvP4zm8JuvM=
 git.frostfs.info/TrueCloudLab/policy-engine v0.0.0-20240611102930-ac965e8d176a h1:Bk1fB4cQASPKgAVGCdlBOEp5ohZfDxqK6fZM8eP+Emo=
@@ -56,6 +54,8 @@ git.frostfs.info/TrueCloudLab/tzhash v1.8.0 h1:UFMnUIk0Zh17m8rjGHJMqku2hCgaXDqjq
 git.frostfs.info/TrueCloudLab/tzhash v1.8.0/go.mod h1:dhY+oy274hV8wGvGL4MwwMpdL3GYvaX1a8GQZQHvlF8=
 git.frostfs.info/TrueCloudLab/zapjournald v0.0.0-20240124114243-cb2e66427d02 h1:HeY8n27VyPRQe49l/fzyVMkWEB2fsLJYKp64pwA7tz4=
 git.frostfs.info/TrueCloudLab/zapjournald v0.0.0-20240124114243-cb2e66427d02/go.mod h1:rQFJJdEOV7KbbMtQYR2lNfiZk+ONRDJSbMCTWxKt8Fw=
+git.frostfs.info/dkirillov/frostfs-sdk-go v0.0.0-20240621142828-0ee3fcc18ffd h1:tLkZ8XzgDbElZvYHJSAR2FTx2IY0F3Y/FIYWRY3X4rY=
+git.frostfs.info/dkirillov/frostfs-sdk-go v0.0.0-20240621142828-0ee3fcc18ffd/go.mod h1:e7H9nNFpx1Tj3R20Zoxy0Vo6Srlb6zV5L7ZQXqg9rn4=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=

internal/frostfs/services/pool_wrapper.go

@@ -15,30 +15,6 @@ import (
 	grpcService "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool/tree/service"
 )
 
-type GetNodeByPathResponseInfoWrapper struct {
-	response *grpcService.GetNodeByPathResponse_Info
-}
-
-func (n GetNodeByPathResponseInfoWrapper) GetNodeID() uint64 {
-	return n.response.GetNodeId()
-}
-
-func (n GetNodeByPathResponseInfoWrapper) GetParentID() uint64 {
-	return n.response.GetParentId()
-}
-
-func (n GetNodeByPathResponseInfoWrapper) GetTimestamp() uint64 {
-	return n.response.GetTimestamp()
-}
-
-func (n GetNodeByPathResponseInfoWrapper) GetMeta() []tree.Meta {
-	res := make([]tree.Meta, len(n.response.Meta))
-	for i, value := range n.response.Meta {
-		res[i] = value
-	}
-	return res
-}
-
 type GetSubTreeResponseBodyWrapper struct {
 	response *grpcService.GetSubTreeResponse_Body
 }
@@ -63,6 +39,87 @@ func (n GetSubTreeResponseBodyWrapper) GetMeta() []tree.Meta {
 	return res
 }
 
+type BurnedListResponseBodyWrapper struct {
+	response *grpcService.BurnedListResponse_Body
+}
+
+func (n BurnedListResponseBodyWrapper) GetMeta() []tree.Meta {
+	res := make([]tree.Meta, len(n.response.Meta))
+	for i, value := range n.response.Meta {
+		res[i] = value
+	}
+	return res
+}
+
+func (n BurnedListResponseBodyWrapper) GetKey() string {
+	return n.response.GetKey()
+}
+
+func (n BurnedListResponseBodyWrapper) GetTimestamp() uint64 {
+	return n.response.GetTimestamp()
+}
+
+type BurnedGetResponseBodyWrapper struct {
+	response *grpcService.BurnedGetResponse_Body
+	key      string
+}
+
+func (n BurnedGetResponseBodyWrapper) GetMeta() []tree.Meta {
+	res := make([]tree.Meta, len(n.response.Meta))
+	for i, value := range n.response.Meta {
+		res[i] = value
+	}
+	return res
+}
+
+func (n BurnedGetResponseBodyWrapper) GetKey() string {
+	return n.key
+}
+
+func (n BurnedGetResponseBodyWrapper) GetTimestamp() uint64 {
+	return n.response.GetTimestamp()
+}
+
+type BurnedListByPrefixResponseBodyInfoWrapper struct {
+	response *grpcService.BurnedListByPrefixResponse_Body_Info
+}
+
+func (n BurnedListByPrefixResponseBodyInfoWrapper) GetMeta() []tree.Meta {
+	res := make([]tree.Meta, len(n.response.Meta))
+	for i, value := range n.response.Meta {
+		res[i] = value
+	}
+	return res
+}
+
+func (n BurnedListByPrefixResponseBodyInfoWrapper) GetKey() string {
+	return n.response.GetKey()
+}
+
+func (n BurnedListByPrefixResponseBodyInfoWrapper) GetTimestamp() uint64 {
+	return n.response.GetTimestamp()
+}
+
+type BurnedGetLatestByPrefixResponseBodyWrapper struct {
+	response *grpcService.BurnedGetLatestByPrefixResponse_Body
+}
+
+func (n BurnedGetLatestByPrefixResponseBodyWrapper) GetMeta() []tree.Meta {
+	res := make([]tree.Meta, len(n.response.Meta))
+	for i, value := range n.response.Meta {
+		res[i] = value
+	}
+	return res
+}
+
+func (n BurnedGetLatestByPrefixResponseBodyWrapper) GetKey() string {
+	return n.response.GetKey()
+}
+
+func (n BurnedGetLatestByPrefixResponseBodyWrapper) GetTimestamp() uint64 {
+	return n.response.GetTimestamp()
+}
+
 type PoolWrapper struct {
 	p *treepool.Pool
 }
@@ -71,77 +128,110 @@ func NewPoolWrapper(p *treepool.Pool) *PoolWrapper {
 	return &PoolWrapper{p: p}
 }
 
-func (w *PoolWrapper) GetNodes(ctx context.Context, prm *tree.GetNodesParams) ([]tree.NodeResponse, error) {
-	poolPrm := treepool.GetNodesParams{
-		CID:           prm.BktInfo.CID,
-		TreeID:        prm.TreeID,
-		Path:          prm.Path,
-		Meta:          prm.Meta,
-		PathAttribute: tree.FileNameKey,
-		LatestOnly:    prm.LatestOnly,
-		AllAttrs:      prm.AllAttrs,
-		BearerToken:   getBearer(ctx, prm.BktInfo),
+func (w *PoolWrapper) BurnedAdd(ctx context.Context, bktInfo *data.BucketInfo, treeID string, key string, meta map[string]string) error {
+	_, err := w.p.BurnedAdd(ctx, treepool.BurnedAddParams{
+		CID:         bktInfo.CID,
+		TreeID:      treeID,
+		Key:         key,
+		Meta:        meta,
+		BearerToken: getBearer(ctx, bktInfo),
+	})
+	return handleError(err)
 }
 
-	nodes, err := w.p.GetNodes(ctx, poolPrm)
+func (w *PoolWrapper) BurnedGet(ctx context.Context, bktInfo *data.BucketInfo, treeID string, key string) (tree.NodeResponse, error) {
+	resp, err := w.p.BurnedGet(ctx, treepool.BurnedGetParams{
+		CID:         bktInfo.CID,
+		TreeID:      treeID,
+		Key:         key,
+		BearerToken: getBearer(ctx, bktInfo),
+	})
+
+	return BurnedGetResponseBodyWrapper{response: resp, key: key}, handleError(err)
+}
+
+func (w *PoolWrapper) BurnedGetLatestByPrefix(ctx context.Context, bktInfo *data.BucketInfo, treeID string, prefix string) (tree.NodeResponse, error) {
+	resp, err := w.p.BurnedGetLatestByPrefix(ctx, treepool.BurnedGetLatestByPrefixParams{
+		CID:         bktInfo.CID,
+		TreeID:      treeID,
+		Prefix:      prefix,
+		BearerToken: getBearer(ctx, bktInfo),
+	})
+
+	return BurnedGetLatestByPrefixResponseBodyWrapper{resp}, handleError(err)
+}
+
+func (w *PoolWrapper) BurnedRemove(ctx context.Context, bktInfo *data.BucketInfo, treeID string, key string) error {
+	return handleError(w.p.BurnedRemove(ctx, treepool.BurnedRemoveParams{
+		CID:         bktInfo.CID,
+		TreeID:      treeID,
+		Key:         key,
+		BearerToken: getBearer(ctx, bktInfo),
+	}))
+}
+
+func (w *PoolWrapper) BurnedListByPrefix(ctx context.Context, bktInfo *data.BucketInfo, treeID string, prefix string) ([]tree.NodeResponse, error) {
+	resp, err := w.p.BurnedListByPrefix(ctx, treepool.BurnedListByPrefixParams{
+		CID:         bktInfo.CID,
+		TreeID:      treeID,
+		Prefix:      prefix,
+		BearerToken: getBearer(ctx, bktInfo),
+	})
 	if err != nil {
 		return nil, handleError(err)
 	}
 
-	res := make([]tree.NodeResponse, len(nodes))
-	for i, info := range nodes {
-		res[i] = GetNodeByPathResponseInfoWrapper{info}
+	res := make([]tree.NodeResponse, len(resp.GetList()))
+	for i, info := range resp.GetList() {
+		res[i] = BurnedListByPrefixResponseBodyInfoWrapper{response: info}
 	}
 
 	return res, nil
 }
 
-func (w *PoolWrapper) GetSubTree(ctx context.Context, bktInfo *data.BucketInfo, treeID string, rootID uint64, depth uint32) ([]tree.NodeResponse, error) {
-	poolPrm := treepool.GetSubTreeParams{
+func (w *PoolWrapper) BurnedList(ctx context.Context, bktInfo *data.BucketInfo, treeID, start string) ([]tree.NodeResponse, error) {
+	cli, err := w.p.BurnedList(ctx, treepool.BurnedListParams{
 		CID:         bktInfo.CID,
 		TreeID:      treeID,
-		RootID:      rootID,
-		Depth:       depth,
+		Start:       start,
 		BearerToken: getBearer(ctx, bktInfo),
-	}
-
-	subTreeReader, err := w.p.GetSubTree(ctx, poolPrm)
+	})
 	if err != nil {
 		return nil, handleError(err)
 	}
 
-	var subtree []tree.NodeResponse
+	var res []tree.NodeResponse
 
-	node, err := subTreeReader.Next()
+	node, err := cli.Next()
 	for err == nil {
-		subtree = append(subtree, GetSubTreeResponseBodyWrapper{node})
-		node, err = subTreeReader.Next()
+		res = append(res, BurnedListResponseBodyWrapper{node})
+		node, err = cli.Next()
 	}
 	if err != nil && err != io.EOF {
 		return nil, handleError(err)
 	}
 
-	return subtree, nil
+	return res, nil
 }
 
-type SubTreeStreamImpl struct {
-	r      *treepool.SubTreeReader
-	buffer []*grpcService.GetSubTreeResponse_Body
+const bufSize = 1000
+
+type BurnedListStreamImpl struct {
+	r      *treepool.BurnedListReader
+	buffer []*grpcService.BurnedListResponse_Body
 	eof    bool
 	index  int
 	ln     int
 }
 
-const bufSize = 1000
-
-func (s *SubTreeStreamImpl) Next() (tree.NodeResponse, error) {
+func (s *BurnedListStreamImpl) Next() (tree.NodeResponse, error) {
 	if s.index != -1 {
 		node := s.buffer[s.index]
 		s.index++
 		if s.index >= s.ln {
 			s.index = -1
 		}
-		return GetSubTreeResponseBodyWrapper{response: node}, nil
+		return BurnedListResponseBodyWrapper{response: node}, nil
 	}
 	if s.eof {
 		return nil, io.EOF
@@ -162,71 +252,24 @@ func (s *SubTreeStreamImpl) Next() (tree.NodeResponse, error) {
 	return s.Next()
 }
 
-func (w *PoolWrapper) GetSubTreeStream(ctx context.Context, bktInfo *data.BucketInfo, treeID string, rootID uint64, depth uint32) (tree.SubTreeStream, error) {
-	poolPrm := treepool.GetSubTreeParams{
+func (w *PoolWrapper) BurnedListStream(ctx context.Context, bktInfo *data.BucketInfo, treeID, start string) (tree.SubTreeStream, error) {
+	cli, err := w.p.BurnedList(ctx, treepool.BurnedListParams{
 		CID:         bktInfo.CID,
 		TreeID:      treeID,
-		RootID:      rootID,
-		Depth:       depth,
+		Start:       start,
 		BearerToken: getBearer(ctx, bktInfo),
-		Order:       treepool.AscendingOrder,
-	}
-
-	subTreeReader, err := w.p.GetSubTree(ctx, poolPrm)
+	})
 	if err != nil {
 		return nil, handleError(err)
 	}
 
-	return &SubTreeStreamImpl{
-		r:      subTreeReader,
-		buffer: make([]*grpcService.GetSubTreeResponse_Body, bufSize),
+	return &BurnedListStreamImpl{
+		r:      cli,
+		buffer: make([]*grpcService.BurnedListResponse_Body, bufSize),
 		index:  -1,
 	}, nil
 }
 
-func (w *PoolWrapper) AddNode(ctx context.Context, bktInfo *data.BucketInfo, treeID string, parent uint64, meta map[string]string) (uint64, error) {
-	nodeID, err := w.p.AddNode(ctx, treepool.AddNodeParams{
-		CID:         bktInfo.CID,
-		TreeID:      treeID,
-		Parent:      parent,
-		Meta:        meta,
-		BearerToken: getBearer(ctx, bktInfo),
-	})
-	return nodeID, handleError(err)
-}
-
-func (w *PoolWrapper) AddNodeByPath(ctx context.Context, bktInfo *data.BucketInfo, treeID string, path []string, meta map[string]string) (uint64, error) {
-	nodeID, err := w.p.AddNodeByPath(ctx, treepool.AddNodeByPathParams{
-		CID:           bktInfo.CID,
-		TreeID:        treeID,
-		Path:          path,
-		Meta:          meta,
-		PathAttribute: tree.FileNameKey,
-		BearerToken:   getBearer(ctx, bktInfo),
-	})
-	return nodeID, handleError(err)
-}
-
-func (w *PoolWrapper) MoveNode(ctx context.Context, bktInfo *data.BucketInfo, treeID string, nodeID, parentID uint64, meta map[string]string) error {
-	return handleError(w.p.MoveNode(ctx, treepool.MoveNodeParams{
-		CID:         bktInfo.CID,
-		TreeID:      treeID,
-		NodeID:      nodeID,
-		ParentID:    parentID,
-		Meta:        meta,
-		BearerToken: getBearer(ctx, bktInfo),
-	}))
-}
-
-func (w *PoolWrapper) RemoveNode(ctx context.Context, bktInfo *data.BucketInfo, treeID string, nodeID uint64) error {
-	return handleError(w.p.RemoveNode(ctx, treepool.RemoveNodeParams{
-		CID:         bktInfo.CID,
-		TreeID:      treeID,
-		NodeID:      nodeID,
-		BearerToken: getBearer(ctx, bktInfo),
-	}))
-}
-
 func getBearer(ctx context.Context, bktInfo *data.BucketInfo) []byte {
 	if bd, err := middleware.GetBoxData(ctx); err == nil {
 		if bd.Gate.BearerToken != nil {

pkg/service/tree/tree_client_in_memory.go

@@ -2,13 +2,13 @@ package tree
 
 import (
 	"context"
-	"fmt"
 	"io"
 	"sort"
+	"strconv"
+	"strings"
 	"time"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	"golang.org/x/exp/slices"
 )
 
 type nodeMeta struct {
@@ -26,17 +26,8 @@ func (m nodeMeta) GetValue() []byte {
 
 type nodeResponse struct {
 	meta      []nodeMeta
-	nodeID    uint64
-	parentID  uint64
 	timestamp uint64
-}
-
-func (n nodeResponse) GetNodeID() uint64 {
-	return n.nodeID
-}
-
-func (n nodeResponse) GetParentID() uint64 {
-	return n.parentID
+	key       string
 }
 
 func (n nodeResponse) GetTimestamp() uint64 {
@@ -48,16 +39,12 @@ func (n nodeResponse) GetMeta() []Meta {
 	for i, value := range n.meta {
 		res[i] = value
 	}
-	return res
+
+	return append(res, nodeMeta{key: "timestamp", value: []byte(strconv.FormatUint(n.timestamp, 10))})
 }
 
-func (n nodeResponse) getValue(key string) string {
-	for _, value := range n.meta {
-		if value.key == key {
-			return string(value.value)
-		}
-	}
-	return ""
+func (n nodeResponse) GetKey() string {
+	return n.key
 }
 
 type ServiceClientMemory struct {
@@ -66,118 +53,10 @@ type ServiceClientMemory struct {
 
 type containerInfo struct {
 	bkt   *data.BucketInfo
-	trees map[string]memoryTree
+	trees map[string]map[string]*nodeResponse
 }
 
-type memoryTree struct {
-	idCounter uint64
-	treeData  *treeNodeMemory
-}
-
-type treeNodeMemory struct {
-	data     nodeResponse
-	parent   *treeNodeMemory
-	children []*treeNodeMemory
-}
-
-func (t *treeNodeMemory) getNode(nodeID uint64) *treeNodeMemory {
-	if t.data.nodeID == nodeID {
-		return t
-	}
-
-	for _, child := range t.children {
-		if node := child.getNode(nodeID); node != nil {
-			return node
-		}
-	}
-
-	return nil
-}
-
-func (t *memoryTree) getNodesByPath(path []string) []nodeResponse {
-	if len(path) == 0 {
-		return nil
-	}
-
-	var res []nodeResponse
-	for _, child := range t.treeData.children {
-		res = child.listNodesByPath(res, path)
-	}
-
-	return res
-}
-
-func (t *treeNodeMemory) listNodesByPath(res []nodeResponse, path []string) []nodeResponse {
-	if len(path) == 0 || t.data.getValue(FileNameKey) != path[0] {
-		return res
-	}
-
-	if len(path) == 1 {
-		return append(res, t.data)
-	}
-
-	for _, ch := range t.children {
-		res = ch.listNodesByPath(res, path[1:])
-	}
-
-	return res
-}
-
-func (t *memoryTree) createPathIfNotExist(parent *treeNodeMemory, path []string) *treeNodeMemory {
-	if len(path) == 0 {
-		return parent
-	}
-
-	var node *treeNodeMemory
-	for _, child := range parent.children {
-		if len(child.data.meta) == 1 && child.data.getValue(FileNameKey) == path[0] {
-			node = child
-			break
-		}
-	}
-
-	if node == nil {
-		node = &treeNodeMemory{
-			data: nodeResponse{
-				meta:      []nodeMeta{{key: FileNameKey, value: []byte(path[0])}},
-				nodeID:    t.idCounter,
-				parentID:  parent.data.nodeID,
-				timestamp: uint64(time.Now().UnixMicro()),
-			},
-			parent: parent,
-		}
-		t.idCounter++
-		parent.children = append(parent.children, node)
-	}
-
-	return t.createPathIfNotExist(node, path[1:])
-}
-
-func (t *treeNodeMemory) removeChild(nodeID uint64) {
-	ind := -1
-	for i, ch := range t.children {
-		if ch.data.nodeID == nodeID {
-			ind = i
-			break
-		}
-	}
-	if ind != -1 {
-		t.children = append(t.children[:ind], t.children[ind+1:]...)
-	}
-}
-
-func (t *treeNodeMemory) listNodes(res []NodeResponse, depth uint32) []NodeResponse {
-	res = append(res, t.data)
-
-	if depth == 0 {
-		return res
-	}
-
-	for _, ch := range t.children {
-		res = ch.listNodes(res, depth-1)
-	}
-	return res
-}
+var _ ServiceClient = (*ServiceClientMemory)(nil)
 
 func NewTreeServiceClientMemory() (*ServiceClientMemory, error) {
 	return &ServiceClientMemory{
@@ -185,72 +64,121 @@ func NewTreeServiceClientMemory() (*ServiceClientMemory, error) {
 	}, nil
 }
 
-type nodeResponseWrapper struct {
-	nodeResponse
-	allAttr bool
-	attrs   []string
-}
-
-func (n nodeResponseWrapper) GetMeta() []Meta {
-	res := make([]Meta, 0, len(n.meta))
-	for _, value := range n.meta {
-		if n.allAttr || slices.Contains(n.attrs, value.key) {
-			res = append(res, value)
-		}
-	}
-	return res
-}
-
-func (c *ServiceClientMemory) GetNodes(_ context.Context, p *GetNodesParams) ([]NodeResponse, error) {
-	cnr, ok := c.containers[p.BktInfo.CID.EncodeToString()]
-	if !ok {
-		return nil, nil
-	}
-
-	tr, ok := cnr.trees[p.TreeID]
-	if !ok {
-		return nil, nil
-	}
-
-	res := tr.getNodesByPath(p.Path)
-	sort.Slice(res, func(i, j int) bool {
-		return res[i].timestamp < res[j].timestamp
-	})
-
-	if p.LatestOnly && len(res) != 0 {
-		res = res[len(res)-1:]
-	}
-
-	res2 := make([]NodeResponse, len(res))
-	for i, n := range res {
-		res2[i] = nodeResponseWrapper{
-			nodeResponse: n,
-			allAttr:      p.AllAttrs,
-			attrs:        p.Meta,
+func newContainerInfo(bktInfo *data.BucketInfo, treeID string) containerInfo {
+	return containerInfo{
+		bkt: bktInfo,
+		trees: map[string]map[string]*nodeResponse{
+			treeID: {},
+		},
 	}
 }
 
-	return res2, nil
-}
-
-func (c *ServiceClientMemory) GetSubTree(_ context.Context, bktInfo *data.BucketInfo, treeID string, rootID uint64, depth uint32) ([]NodeResponse, error) {
+func (c *ServiceClientMemory) BurnedAdd(_ context.Context, bktInfo *data.BucketInfo, treeID string, key string, meta map[string]string) error {
 	cnr, ok := c.containers[bktInfo.CID.EncodeToString()]
 	if !ok {
-		return nil, nil
+		cnr = newContainerInfo(bktInfo, treeID)
+		c.containers[bktInfo.CID.EncodeToString()] = cnr
 	}
 
 	tr, ok := cnr.trees[treeID]
+	if !ok {
+		tr = make(map[string]*nodeResponse)
+	}
+
+	tr[key] = &nodeResponse{
+		meta:      metaToNodeMeta(meta),
+		key:       key,
+		timestamp: uint64(time.Now().UnixMicro()),
+	}
+
+	cnr.trees[treeID] = tr
+	return nil
+}
+
+func (c *ServiceClientMemory) BurnedGet(_ context.Context, bktInfo *data.BucketInfo, treeID string, key string) (NodeResponse, error) {
+	cnr, ok := c.containers[bktInfo.CID.EncodeToString()]
 	if !ok {
 		return nil, ErrNodeNotFound
 	}
 
-	node := tr.treeData.getNode(rootID)
-	if node == nil {
+	node, ok := cnr.trees[treeID][key]
+	if !ok {
 		return nil, ErrNodeNotFound
 	}
 
-	// we depth-1 in case of uint32 and 0 as mark to get all subtree leads to overflow and depth is getting quite big to walk all tree levels
-	return node.listNodes(nil, depth-1), nil
+	return node, nil
+}
+
+func (c *ServiceClientMemory) BurnedGetLatestByPrefix(_ context.Context, bktInfo *data.BucketInfo, treeID string, prefix string) (NodeResponse, error) {
+	cnr, ok := c.containers[bktInfo.CID.EncodeToString()]
+	if !ok {
+		return nil, ErrNodeNotFound
+	}
+
+	var res *nodeResponse
+	for k, val := range cnr.trees[treeID] {
+		if strings.HasPrefix(k, prefix) {
+			if res == nil || res.timestamp < val.timestamp {
+				res = val
+			}
+		}
+	}
+
+	if res == nil {
+		return nil, ErrNodeNotFound
+	}
+
+	return res, nil
+}
+
+func (c *ServiceClientMemory) BurnedRemove(_ context.Context, bktInfo *data.BucketInfo, treeID string, key string) error {
+	cnr, ok := c.containers[bktInfo.CID.EncodeToString()]
+	if !ok {
+		return ErrNodeNotFound
+	}
+
+	tr, ok := cnr.trees[treeID]
+	if !ok {
+		return ErrNodeNotFound
+	}
+
+	delete(tr, key)
+	return nil
+}
+
+func (c *ServiceClientMemory) BurnedListByPrefix(_ context.Context, bktInfo *data.BucketInfo, treeID string, prefix string) ([]NodeResponse, error) {
+	cnr, ok := c.containers[bktInfo.CID.EncodeToString()]
+	if !ok {
+		return nil, ErrNodeNotFound
+	}
+
+	var res []NodeResponse
+	for k, val := range cnr.trees[treeID] {
+		if strings.HasPrefix(k, prefix) {
+			res = append(res, val)
+		}
+	}
+
+	sort.Slice(res, func(i, j int) bool {
+		return res[i].GetKey() < res[j].GetKey()
+	})
+
+	return res, nil
+}
+
+func (c *ServiceClientMemory) BurnedList(ctx context.Context, bktInfo *data.BucketInfo, treeID, start string) ([]NodeResponse, error) {
+	res, err := c.BurnedListByPrefix(ctx, bktInfo, treeID, "")
+	if err != nil {
+		return nil, err
+	}
+
+	for i := range res {
+		if res[i].GetKey() > start {
+			return res[i:], nil
+		}
+	}
+
+	return nil, nil
 }
 
 type SubTreeStreamMemoryImpl struct {
@@ -270,205 +198,20 @@ func (s *SubTreeStreamMemoryImpl) Next() (NodeResponse, error) {
 	return s.res[s.offset-1], nil
 }
 
-func (c *ServiceClientMemory) GetSubTreeStream(_ context.Context, bktInfo *data.BucketInfo, treeID string, rootID uint64, depth uint32) (SubTreeStream, error) {
-	cnr, ok := c.containers[bktInfo.CID.EncodeToString()]
-	if !ok {
-		return &SubTreeStreamMemoryImpl{err: ErrNodeNotFound}, nil
+func (c *ServiceClientMemory) BurnedListStream(ctx context.Context, bktInfo *data.BucketInfo, treeID, start string) (SubTreeStream, error) {
+	res, err := c.BurnedListByPrefix(ctx, bktInfo, treeID, "")
+	if err != nil {
+		return nil, err
 	}
 
-	tr, ok := cnr.trees[treeID]
-	if !ok {
-		return nil, ErrNodeNotFound
-	}
-
-	node := tr.treeData.getNode(rootID)
-	if node == nil {
-		return nil, ErrNodeNotFound
-	}
-
-	sortNode(tr.treeData)
-
-	return &SubTreeStreamMemoryImpl{
-		res:    node.listNodes(nil, depth-1),
-		offset: 0,
-	}, nil
-}
-
-func newContainerInfo(bktInfo *data.BucketInfo, treeID string) containerInfo {
-	return containerInfo{
-		bkt: bktInfo,
-		trees: map[string]memoryTree{
-			treeID: {
-				idCounter: 1,
-				treeData: &treeNodeMemory{
-					data: nodeResponse{
-						timestamp: uint64(time.Now().UnixMicro()),
-					},
-				},
-			},
-		},
+	for i, item := range res {
+		if start <= item.GetKey() {
+			res = res[i:]
+			break
 		}
 	}
 
-func newMemoryTree() memoryTree {
-	return memoryTree{
-		idCounter: 1,
-		treeData: &treeNodeMemory{
-			data: nodeResponse{
-				timestamp: uint64(time.Now().UnixMicro()),
-			},
-		},
-	}
-}
-
-func (c *ServiceClientMemory) AddNode(ctx context.Context, bktInfo *data.BucketInfo, treeID string, parent uint64, meta map[string]string) (uint64, error) {
-	return c.AddNodeBase(ctx, bktInfo, treeID, parent, meta, true)
-}
-
-func (c *ServiceClientMemory) AddNodeBase(_ context.Context, bktInfo *data.BucketInfo, treeID string, parent uint64, meta map[string]string, needSort bool) (uint64, error) {
-	cnr, ok := c.containers[bktInfo.CID.EncodeToString()]
-	if !ok {
-		cnr = newContainerInfo(bktInfo, treeID)
-		c.containers[bktInfo.CID.EncodeToString()] = cnr
-	}
-
-	tr, ok := cnr.trees[treeID]
-	if !ok {
-		tr = newMemoryTree()
-		cnr.trees[treeID] = tr
-	}
-
-	parentNode := tr.treeData.getNode(parent)
-	if parentNode == nil {
-		return 0, ErrNodeNotFound
-	}
-
-	newID := tr.idCounter
-	tr.idCounter++
-
-	tn := &treeNodeMemory{
-		data: nodeResponse{
-			meta:      metaToNodeMeta(meta),
-			nodeID:    newID,
-			parentID:  parent,
-			timestamp: uint64(time.Now().UnixMicro()),
-		},
-		parent: parentNode,
-	}
-
-	parentNode.children = append(parentNode.children, tn)
-	if needSort {
-		sortNodes(parentNode.children)
-	}
-	cnr.trees[treeID] = tr
-
-	return newID, nil
-}
-
-func (c *ServiceClientMemory) AddNodeByPath(_ context.Context, bktInfo *data.BucketInfo, treeID string, path []string, meta map[string]string) (uint64, error) {
-	cnr, ok := c.containers[bktInfo.CID.EncodeToString()]
-	if !ok {
-		cnr = newContainerInfo(bktInfo, treeID)
-		c.containers[bktInfo.CID.EncodeToString()] = cnr
-	}
-
-	tr, ok := cnr.trees[treeID]
-	if !ok {
-		tr = newMemoryTree()
-		cnr.trees[treeID] = tr
-	}
-
-	parentNode := tr.createPathIfNotExist(tr.treeData, path)
-	if parentNode == nil {
-		return 0, fmt.Errorf("create path '%s'", path)
-	}
-
-	newID := tr.idCounter
-	tr.idCounter++
-
-	tn := &treeNodeMemory{
-		data: nodeResponse{
-			meta:      metaToNodeMeta(meta),
-			nodeID:    newID,
-			parentID:  parentNode.data.nodeID,
-			timestamp: uint64(time.Now().UnixMicro()),
-		},
-		parent: parentNode,
-	}
-
-	parentNode.children = append(parentNode.children, tn)
-	cnr.trees[treeID] = tr
-
-	return newID, nil
-}
-
-func (c *ServiceClientMemory) MoveNode(_ context.Context, bktInfo *data.BucketInfo, treeID string, nodeID, parentID uint64, meta map[string]string) error {
-	cnr, ok := c.containers[bktInfo.CID.EncodeToString()]
-	if !ok {
-		return ErrNodeNotFound
-	}
-
-	tr, ok := cnr.trees[treeID]
-	if !ok {
-		return ErrNodeNotFound
-	}
-
-	node := tr.treeData.getNode(nodeID)
-	if node == nil {
-		return ErrNodeNotFound
-	}
-
-	newParent := tr.treeData.getNode(parentID)
-	if newParent == nil {
-		return ErrNodeNotFound
-	}
-
-	node.data.meta = metaToNodeMeta(meta)
-	node.data.parentID = parentID
-
-	newParent.children = append(newParent.children, node)
-	node.parent.removeChild(nodeID)
-
-	return nil
-}
-
-func sortNode(node *treeNodeMemory) {
-	if node == nil {
-		return
-	}
-
-	sortNodes(node.children)
-
-	for _, child := range node.children {
-		sortNode(child)
-	}
-}
-
-func sortNodes(list []*treeNodeMemory) {
-	sort.Slice(list, func(i, j int) bool {
-		return list[i].data.getValue(FileNameKey) < list[j].data.getValue(FileNameKey)
-	})
-}
-
-func (c *ServiceClientMemory) RemoveNode(_ context.Context, bktInfo *data.BucketInfo, treeID string, nodeID uint64) error {
-	cnr, ok := c.containers[bktInfo.CID.EncodeToString()]
-	if !ok {
-		return ErrNodeNotFound
-	}
-
-	tr, ok := cnr.trees[treeID]
-	if !ok {
-		return ErrNodeNotFound
-	}
-
-	node := tr.treeData.getNode(nodeID)
-	if node == nil {
-		return ErrNodeNotFound
-	}
-
-	node.parent.removeChild(nodeID)
-
-	return nil
+	return &SubTreeStreamMemoryImpl{res: res}, nil
 }
 
 func metaToNodeMeta(m map[string]string) []nodeMeta {

pkg/service/tree/tree_test.go

@@ -163,12 +163,11 @@ func TestTreeServiceAddVersion(t *testing.T) {
 		IsUnversioned: true,
 	}
 
-	nodeID, err := treeService.AddVersion(ctx, bktInfo, version)
+	err = treeService.AddVersion(ctx, bktInfo, version)
 	require.NoError(t, err)
 
 	storedNode, err := treeService.GetUnversioned(ctx, bktInfo, "path/to/version")
 	require.NoError(t, err)
-	require.Equal(t, nodeID, storedNode.ID)
 	require.Equal(t, version.BaseNodeVersion.Size, storedNode.Size)
 	require.Equal(t, version.BaseNodeVersion.ETag, storedNode.ETag)
 	require.Equal(t, version.BaseNodeVersion.ETag, storedNode.ETag)
@@ -185,7 +184,7 @@ func TestGetLatestNode(t *testing.T) {
 	for _, tc := range []struct {
 		name              string
 		nodes             []NodeResponse
-		expectedNodeID uint64
+		exceptedTimestamp uint64
 		error             bool
 	}{
 		{
@@ -197,8 +196,6 @@ func TestGetLatestNode(t *testing.T) {
 			name: "one node of the object version",
 			nodes: []NodeResponse{
 				nodeResponse{
-					nodeID:    1,
-					parentID:  0,
 					timestamp: 1,
 					meta: []nodeMeta{
 						{
@@ -208,20 +205,16 @@ func TestGetLatestNode(t *testing.T) {
 					},
 				},
 			},
-			expectedNodeID: 1,
+			exceptedTimestamp: 1,
 		},
 		{
 			name: "one node of the object version and one node of the secondary object",
 			nodes: []NodeResponse{
 				nodeResponse{
-					nodeID:    2,
-					parentID:  0,
 					timestamp: 3,
 					meta:      []nodeMeta{},
 				},
 				nodeResponse{
-					nodeID:    1,
-					parentID:  0,
 					timestamp: 1,
 					meta: []nodeMeta{
 						{
@@ -231,20 +224,16 @@ func TestGetLatestNode(t *testing.T) {
 					},
 				},
 			},
-			expectedNodeID: 1,
+			exceptedTimestamp: 1,
 		},
 		{
 			name: "all nodes represent a secondary object",
 			nodes: []NodeResponse{
 				nodeResponse{
-					nodeID:    2,
-					parentID:  0,
 					timestamp: 3,
 					meta:      []nodeMeta{},
 				},
 				nodeResponse{
-					nodeID:    4,
-					parentID:  0,
 					timestamp: 5,
 					meta:      []nodeMeta{},
 				},
@@ -255,8 +244,6 @@ func TestGetLatestNode(t *testing.T) {
 			name: "several nodes of different types and with different timestamp",
 			nodes: []NodeResponse{
 				nodeResponse{
-					nodeID:    1,
-					parentID:  0,
 					timestamp: 1,
 					meta: []nodeMeta{
 						{
@@ -266,14 +253,10 @@ func TestGetLatestNode(t *testing.T) {
 					},
 				},
 				nodeResponse{
-					nodeID:    3,
-					parentID:  0,
 					timestamp: 3,
 					meta:      []nodeMeta{},
 				},
 				nodeResponse{
-					nodeID:    4,
-					parentID:  0,
 					timestamp: 4,
 					meta: []nodeMeta{
 						{
@@ -283,13 +266,11 @@ func TestGetLatestNode(t *testing.T) {
 					},
 				},
 				nodeResponse{
-					nodeID:    6,
-					parentID:  0,
 					timestamp: 6,
 					meta:      []nodeMeta{},
 				},
 			},
-			expectedNodeID: 4,
+			exceptedTimestamp: 4,
 		},
 	} {
 		t.Run(tc.name, func(t *testing.T) {
@@ -298,9 +279,13 @@ func TestGetLatestNode(t *testing.T) {
 				require.Error(t, err)
 				return
 			}
+			require.NoError(t, err)
+
+			tNode, err := newTreeNode(actualNode)
+			require.NoError(t, err)
 
 			require.NoError(t, err)
-			require.Equal(t, tc.expectedNodeID, actualNode.GetNodeID())
+			require.EqualValues(t, tc.exceptedTimestamp, tNode.TimeStamp)
 		})
 	}
 }