diff --git a/pkg/acl/acltree/acltree.go b/pkg/acl/acltree/acltree.go
index 4b091433..078feb92 100644
--- a/pkg/acl/acltree/acltree.go
+++ b/pkg/acl/acltree/acltree.go
@@ -279,7 +279,7 @@ func (a *aclTree) AddRawChanges(ctx context.Context, rawChanges ...*aclpb.RawCha
 	var err error
 	var mode Mode
 
-	var changes []*Change
+	var changes []*Change // TODO: = addChangesBuf[:0] ...
 	for _, ch := range rawChanges {
 		change, err := NewFromRawChange(ch)
 		// TODO: think what if we will have incorrect signatures on rawChanges, how everything will work
diff --git a/service/sync/document/service.go b/service/sync/document/service.go
new file mode 100644
index 00000000..075db778
--- /dev/null
+++ b/service/sync/document/service.go
@@ -0,0 +1 @@
+package document
diff --git a/service/sync/message/service.go b/service/sync/message/service.go
index e6670c63..7a51ce23 100644
--- a/service/sync/message/service.go
+++ b/service/sync/message/service.go
@@ -35,6 +35,7 @@ func NewMessageService() app.Component {
 type Service interface {
 	RegisterMessageSender(peerId string) chan *syncpb.SyncContent
 	UnregisterMessageSender(peerId string)
+
 	HandleMessage(peerId string, msg *syncpb.SyncContent) error
 	SendMessage(peerId string, msg *syncpb.SyncContent) error
 }
diff --git a/service/sync/requesthandler/requesthandler.go b/service/sync/requesthandler/requesthandler.go
index f9d854a5..ba30a39c 100644
--- a/service/sync/requesthandler/requesthandler.go
+++ b/service/sync/requesthandler/requesthandler.go
@@ -238,7 +238,14 @@ func (r *requestHandler) prepareFullSyncResponse(
 }
 
 func (r *requestHandler) createTree(ctx context.Context, response *syncpb.SyncFullResponse) error {
-	return r.treeCache.Add(ctx, response.TreeId, response.TreeHeader, response.Changes)
+	return r.treeCache.Add(
+		ctx,
+		response.TreeId,
+		response.TreeHeader,
+		response.Changes,
+		func(tree acltree.ACLTree) error {
+			return nil
+		})
 }
 
 func wrapHeadUpdate(update *syncpb.SyncHeadUpdate) *syncpb.SyncContent {
diff --git a/service/treecache/service.go b/service/treecache/service.go
index 82460917..d832e40c 100644
--- a/service/treecache/service.go
+++ b/service/treecache/service.go
@@ -13,9 +13,13 @@ import (
 
 const CName = "treecache"
 
+type ACLTreeFunc = func(tree acltree.ACLTree) error
+type ChangeBuildFunc = func(builder acltree.ChangeBuilder) error
+
 type Service interface {
-	Do(ctx context.Context, treeId string, f func(tree acltree.ACLTree) error) error
-	Add(ctx context.Context, treeId string, header *treepb.TreeHeader, changes []*aclpb.RawChange) error
+	Do(ctx context.Context, treeId string, f ACLTreeFunc) error
+	Add(ctx context.Context, treeId string, header *treepb.TreeHeader, changes []*aclpb.RawChange, f ACLTreeFunc) error
+	Create(ctx context.Context, build ChangeBuildFunc, f ACLTreeFunc) error
 }
 
 type service struct {
@@ -28,7 +32,22 @@ func NewTreeCache() app.ComponentRunnable {
 	return &service{}
 }
 
-func (s *service) Do(ctx context.Context, treeId string, f func(tree acltree.ACLTree) error) error {
+func (s *service) Create(ctx context.Context, build ChangeBuildFunc, f ACLTreeFunc) error {
+	acc := s.account.Account()
+	st, err := acltree.CreateNewTreeStorageWithACL(acc, build, s.treeProvider.CreateTreeStorage)
+	if err != nil {
+		return err
+	}
+
+	id, err := st.TreeID()
+	if err != nil {
+		return err
+	}
+
+	return s.Do(ctx, id, f)
+}
+
+func (s *service) Do(ctx context.Context, treeId string, f ACLTreeFunc) error {
 	tree, err := s.cache.Get(ctx, treeId)
 	defer s.cache.Release(treeId)
 	if err != nil {
@@ -40,14 +59,12 @@ func (s *service) Do(ctx context.Context, treeId string, f func(tree acltree.ACL
 	return f(tree.(acltree.ACLTree))
 }
 
-func (s *service) Add(ctx context.Context, treeId string, header *treepb.TreeHeader, changes []*aclpb.RawChange) error {
+func (s *service) Add(ctx context.Context, treeId string, header *treepb.TreeHeader, changes []*aclpb.RawChange, f ACLTreeFunc) error {
 	_, err := s.treeProvider.CreateTreeStorage(treeId, header, changes)
 	if err != nil {
 		return err
 	}
-	// forcing the tree to build
-	_, err = s.cache.Get(ctx, treeId)
-	return err
+	return s.Do(ctx, treeId, f)
 }
 
 func (s *service) Init(ctx context.Context, a *app.App) (err error) {