WIP document deletion

client/storage/keys.go

@@ -31,18 +31,20 @@ func (a aclKeys) RawRecordKey(id string) []byte {
 }
 
 type treeKeys struct {
-	id       string
+	id              string
-	spaceId  string
+	spaceId         string
-	headsKey []byte
+	headsKey        []byte
-	rootKey  []byte
+	rootKey         []byte
+	rawChangePrefix []byte
 }
 
 func newTreeKeys(spaceId, id string) treeKeys {
 	return treeKeys{
-		id:       id,
+		id:              id,
-		spaceId:  spaceId,
+		spaceId:         spaceId,
-		headsKey: storage.JoinStringsToBytes("space", spaceId, "t", id, "heads"),
+		headsKey:        storage.JoinStringsToBytes("space", spaceId, "t", id, "heads"),
-		rootKey:  storage.JoinStringsToBytes("space", spaceId, "t", "rootId", id),
+		rootKey:         storage.JoinStringsToBytes("space", spaceId, "t", "rootId", id),
+		rawChangePrefix: storage.JoinStringsToBytes("space", spaceId, "t", id),
 	}
 }
 
@@ -58,6 +60,10 @@ func (t treeKeys) RawChangeKey(id string) []byte {
 	return storage.JoinStringsToBytes("space", t.spaceId, "t", t.id, id)
 }
 
+func (t treeKeys) RawChangePrefix() []byte {
+	return t.rawChangePrefix
+}
+
 type spaceKeys struct {
 	headerKey          []byte
 	treePrefixKey      []byte

client/storage/treestorage.go

@@ -133,3 +133,45 @@ func (t *treeStorage) GetRawChange(ctx context.Context, id string) (raw *treecha
 func (t *treeStorage) HasChange(ctx context.Context, id string) (bool, error) {
 	return hasDB(t.db, t.keys.RawChangeKey(id)), nil
 }
+
+func (t *treeStorage) Delete() (err error) {
+	storedKeys, err := t.storedKeys()
+	if err != nil {
+		return
+	}
+	err = t.db.Update(func(txn *badger.Txn) error {
+		for _, k := range storedKeys {
+			err = txn.Delete(k)
+			if err != nil {
+				return err
+			}
+		}
+		return nil
+	})
+	return
+}
+
+func (t *treeStorage) storedKeys() (keys [][]byte, err error) {
+	err = t.db.View(func(txn *badger.Txn) error {
+		opts := badger.DefaultIteratorOptions
+		opts.PrefetchValues = false
+		opts.Prefix = t.keys.RawChangePrefix()
+
+		it := txn.NewIterator(opts)
+		defer it.Close()
+
+		for it.Rewind(); it.Valid(); it.Next() {
+			item := it.Item()
+			key := item.Key()
+			// if it is a heads key
+			if len(key) <= len(t.keys.HeadsKey()) {
+				continue
+			}
+			keyCopy := make([]byte, 0, len(key))
+			keyCopy = item.KeyCopy(key)
+			keys = append(keys, keyCopy)
+		}
+		return nil
+	})
+	return
+}

common/commonspace/deletionservice/service.go

@@ -1,28 +0,0 @@
-package deletionservice
-
-import (
-	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/account"
-	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/pkg/acl/tree"
-)
-
-type Service interface {
-}
-
-const deletionChangeType = "space.deletionlist"
-
-type service struct {
-	account account.Service
-}
-
-func New() Service {
-	return nil
-}
-
-func deriveDeletionTreePayload(account account.Service, spaceId string) tree.ObjectTreeCreatePayload {
-	return tree.ObjectTreeCreatePayload{
-		SignKey:    account.Account().SignKey,
-		ChangeType: deletionChangeType,
-		SpaceId:    spaceId,
-		Identity:   account.Account().Identity,
-	}
-}

common/commonspace/payloads.go

@@ -3,7 +3,9 @@ package commonspace
 import (
 	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/commonspace/spacesyncproto"
 	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/commonspace/storage"
-	aclrecordproto2 "github.com/anytypeio/go-anytype-infrastructure-experiments/common/pkg/acl/aclrecordproto"
+	aclrecordproto "github.com/anytypeio/go-anytype-infrastructure-experiments/common/pkg/acl/aclrecordproto"
+	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/pkg/acl/common"
+	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/pkg/acl/tree"
 	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/util/cid"
 	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/util/keys/asymmetric/signingkey"
 	"hash/fnv"
@@ -11,6 +13,11 @@ import (
 	"time"
 )
 
+const (
+	SpaceSettingsChangeType = "reserved.spacesettings"
+	SpaceDerivationScheme   = "derivation.standard"
+)
+
 func storagePayloadForSpaceCreate(payload SpaceCreatePayload) (storagePayload storage.SpaceStorageCreatePayload, err error) {
 	// unmarshalling signing and encryption keys
 	identity, err := payload.SigningKey.GetPublic().Raw()
@@ -23,8 +30,8 @@ func storagePayloadForSpaceCreate(payload SpaceCreatePayload) (storagePayload st
 	}
 
 	// preparing header and space id
-	bytes := make([]byte, 32)
+	spaceHeaderSeed := make([]byte, 32)
-	_, err = rand.Read(bytes)
+	_, err = rand.Read(spaceHeaderSeed)
 	if err != nil {
 		return
 	}
@@ -33,7 +40,7 @@ func storagePayloadForSpaceCreate(payload SpaceCreatePayload) (storagePayload st
 		Timestamp:      time.Now().UnixNano(),
 		SpaceType:      payload.SpaceType,
 		ReplicationKey: payload.ReplicationKey,
-		Seed:           bytes,
+		Seed:           spaceHeaderSeed,
 	}
 	marshalled, err := header.Marshal()
 	if err != nil {
@@ -68,12 +75,11 @@ func storagePayloadForSpaceCreate(payload SpaceCreatePayload) (storagePayload st
 	}
 
 	// preparing acl
-	aclRoot := &aclrecordproto2.ACLRoot{
+	aclRoot := &aclrecordproto.ACLRoot{
 		Identity:           identity,
 		EncryptionKey:      encPubKey,
 		SpaceId:            spaceId,
 		EncryptedReadKey:   encReadKey,
-		DerivationScheme:   "",
 		CurrentReadKeyHash: readKeyHash,
 		Timestamp:          time.Now().UnixNano(),
 	}
@@ -82,10 +88,31 @@ func storagePayloadForSpaceCreate(payload SpaceCreatePayload) (storagePayload st
 		return
 	}
 
+	builder := tree.NewChangeBuilder(common.NewKeychain(), nil)
+	spaceSettingsSeed := make([]byte, 32)
+	_, err = rand.Read(spaceSettingsSeed)
+	if err != nil {
+		return
+	}
+
+	_, settingsRoot, err := builder.BuildInitialContent(tree.InitialContent{
+		AclHeadId:  rawWithId.Id,
+		Identity:   aclRoot.Identity,
+		SigningKey: payload.SigningKey,
+		SpaceId:    spaceId,
+		Seed:       spaceSettingsSeed,
+		ChangeType: SpaceSettingsChangeType,
+		Timestamp:  time.Now().UnixNano(),
+	})
+	if err != nil {
+		return
+	}
+
 	// creating storage
 	storagePayload = storage.SpaceStorageCreatePayload{
-		AclWithId:         rawWithId,
+		AclWithId:           rawWithId,
-		SpaceHeaderWithId: rawHeaderWithId,
+		SpaceHeaderWithId:   rawHeaderWithId,
+		SpaceSettingsWithId: settingsRoot,
 	}
 	return
 }
@@ -144,7 +171,7 @@ func storagePayloadForSpaceDerive(payload SpaceDerivePayload) (storagePayload st
 	}
 
 	// deriving and encrypting read key
-	readKey, err := aclrecordproto2.ACLReadKeyDerive(signPrivKey, encPrivKey)
+	readKey, err := aclrecordproto.ACLReadKeyDerive(signPrivKey, encPrivKey)
 	if err != nil {
 		return
 	}
@@ -160,29 +187,41 @@ func storagePayloadForSpaceDerive(payload SpaceDerivePayload) (storagePayload st
 	}
 
 	// preparing acl
-	aclRoot := &aclrecordproto2.ACLRoot{
+	aclRoot := &aclrecordproto.ACLRoot{
 		Identity:           identity,
 		EncryptionKey:      encPubKey,
 		SpaceId:            spaceId,
 		EncryptedReadKey:   encReadKey,
-		DerivationScheme:   "",
+		DerivationScheme:   SpaceDerivationScheme,
 		CurrentReadKeyHash: readKeyHash,
-		Timestamp:          time.Now().UnixNano(),
 	}
 	rawWithId, err := marshalACLRoot(aclRoot, payload.SigningKey)
 	if err != nil {
 		return
 	}
 
+	builder := tree.NewChangeBuilder(common.NewKeychain(), nil)
+	_, settingsRoot, err := builder.BuildInitialContent(tree.InitialContent{
+		AclHeadId:  rawWithId.Id,
+		Identity:   aclRoot.Identity,
+		SigningKey: payload.SigningKey,
+		SpaceId:    spaceId,
+		ChangeType: SpaceSettingsChangeType,
+	})
+	if err != nil {
+		return
+	}
+
 	// creating storage
 	storagePayload = storage.SpaceStorageCreatePayload{
-		AclWithId:         rawWithId,
+		AclWithId:           rawWithId,
-		SpaceHeaderWithId: rawHeaderWithId,
+		SpaceHeaderWithId:   rawHeaderWithId,
+		SpaceSettingsWithId: settingsRoot,
 	}
 	return
 }
 
-func marshalACLRoot(aclRoot *aclrecordproto2.ACLRoot, key signingkey.PrivKey) (rawWithId *aclrecordproto2.RawACLRecordWithId, err error) {
+func marshalACLRoot(aclRoot *aclrecordproto.ACLRoot, key signingkey.PrivKey) (rawWithId *aclrecordproto.RawACLRecordWithId, err error) {
 	marshalledRoot, err := aclRoot.Marshal()
 	if err != nil {
 		return
@@ -191,7 +230,7 @@ func marshalACLRoot(aclRoot *aclrecordproto2.ACLRoot, key signingkey.PrivKey) (r
 	if err != nil {
 		return
 	}
-	raw := &aclrecordproto2.RawACLRecord{
+	raw := &aclrecordproto.RawACLRecord{
 		Payload:   marshalledRoot,
 		Signature: signature,
 	}
@@ -203,7 +242,7 @@ func marshalACLRoot(aclRoot *aclrecordproto2.ACLRoot, key signingkey.PrivKey) (r
 	if err != nil {
 		return
 	}
-	rawWithId = &aclrecordproto2.RawACLRecordWithId{
+	rawWithId = &aclrecordproto.RawACLRecordWithId{
 		Payload: marshalledRaw,
 		Id:      aclHeadId,
 	}

common/commonspace/settingsservice/service.go

@@ -0,0 +1,22 @@
+package settingsservice
+
+import (
+	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/account"
+)
+
+type Service interface {
+}
+
+const deletionChangeType = "space.deletionlist"
+
+type service struct {
+	account account.Service
+}
+
+func New() Service {
+	return nil
+}
+
+type DeletedDocumentNotifiable interface {
+	NotifyDeleted(id string)
+}

common/commonspace/space.go

@@ -141,6 +141,7 @@ func (s *space) Init(ctx context.Context) (err error) {
 	if err != nil {
 		return
 	}
+
 	s.aclList = syncacl.NewSyncACL(aclList, s.syncService.StreamPool())
 	objectGetter := newCommonSpaceGetter(s.id, s.aclList, s.cache)
 	s.syncService.Init(objectGetter)

common/commonspace/synctree/synctree.go

@@ -5,6 +5,7 @@ import (
 	"errors"
 	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/app/logger"
 	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/commonspace/diffservice"
+	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/commonspace/settingsservice"
 	spacestorage "github.com/anytypeio/go-anytype-infrastructure-experiments/common/commonspace/storage"
 	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/commonspace/syncservice"
 	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/commonspace/syncservice/synchandler"
@@ -18,15 +19,20 @@ import (
 	"github.com/gogo/protobuf/proto"
 )
 
-var ErrSyncTreeClosed = errors.New("sync tree is closed")
+var (
+	ErrSyncTreeClosed  = errors.New("sync tree is closed")
+	ErrSyncTreeDeleted = errors.New("sync tree is deleted")
+)
 
 // SyncTree sends head updates to sync service and also sends new changes to update listener
 type SyncTree struct {
 	tree.ObjectTree
 	synchandler.SyncHandler
-	syncClient SyncClient
+	syncClient        SyncClient
-	listener   updatelistener.UpdateListener
+	listener          updatelistener.UpdateListener
-	isClosed   bool
+	deletedNotifiable settingsservice.DeletedDocumentNotifiable
+	isClosed          bool
+	isDeleted         bool
 }
 
 var log = logger.NewNamed("commonspace.synctree").Sugar()
@@ -37,25 +43,27 @@ var buildObjectTree = tree.BuildObjectTree
 var createSyncClient = newSyncClient
 
 type CreateDeps struct {
-	SpaceId        string
+	SpaceId           string
-	Payload        tree.ObjectTreeCreatePayload
+	Payload           tree.ObjectTreeCreatePayload
-	Configuration  nodeconf.Configuration
+	Configuration     nodeconf.Configuration
-	HeadNotifiable diffservice.HeadNotifiable
+	HeadNotifiable    diffservice.HeadNotifiable
-	StreamPool     syncservice.StreamPool
+	StreamPool        syncservice.StreamPool
-	Listener       updatelistener.UpdateListener
+	Listener          updatelistener.UpdateListener
-	AclList        list.ACLList
+	AclList           list.ACLList
-	CreateStorage  storage.TreeStorageCreatorFunc
+	CreateStorage     storage.TreeStorageCreatorFunc
+	DeletedNotifiable settingsservice.DeletedDocumentNotifiable
 }
 
 type BuildDeps struct {
-	SpaceId        string
+	SpaceId           string
-	StreamPool     syncservice.StreamPool
+	StreamPool        syncservice.StreamPool
-	Configuration  nodeconf.Configuration
+	Configuration     nodeconf.Configuration
-	HeadNotifiable diffservice.HeadNotifiable
+	HeadNotifiable    diffservice.HeadNotifiable
-	Listener       updatelistener.UpdateListener
+	Listener          updatelistener.UpdateListener
-	AclList        list.ACLList
+	AclList           list.ACLList
-	SpaceStorage   spacestorage.SpaceStorage
+	SpaceStorage      spacestorage.SpaceStorage
-	TreeStorage    storage.TreeStorage
+	TreeStorage       storage.TreeStorage
+	DeletedNotifiable settingsservice.DeletedDocumentNotifiable
 }
 
 func DeriveSyncTree(ctx context.Context, deps CreateDeps) (t tree.ObjectTree, err error) {
@@ -70,9 +78,10 @@ func DeriveSyncTree(ctx context.Context, deps CreateDeps) (t tree.ObjectTree, er
 		sharedFactory,
 		deps.Configuration)
 	syncTree := &SyncTree{
-		ObjectTree: t,
+		ObjectTree:        t,
-		syncClient: syncClient,
+		syncClient:        syncClient,
-		listener:   deps.Listener,
+		listener:          deps.Listener,
+		deletedNotifiable: deps.DeletedNotifiable,
 	}
 	syncHandler := newSyncTreeHandler(syncTree, syncClient)
 	syncTree.SyncHandler = syncHandler
@@ -95,9 +104,10 @@ func CreateSyncTree(ctx context.Context, deps CreateDeps) (t tree.ObjectTree, er
 		GetRequestFactory(),
 		deps.Configuration)
 	syncTree := &SyncTree{
-		ObjectTree: t,
+		ObjectTree:        t,
-		syncClient: syncClient,
+		syncClient:        syncClient,
-		listener:   deps.Listener,
+		listener:          deps.Listener,
+		deletedNotifiable: deps.DeletedNotifiable,
 	}
 	syncHandler := newSyncTreeHandler(syncTree, syncClient)
 	syncTree.SyncHandler = syncHandler
@@ -175,9 +185,10 @@ func buildSyncTree(ctx context.Context, isFirstBuild bool, deps BuildDeps) (t tr
 		GetRequestFactory(),
 		deps.Configuration)
 	syncTree := &SyncTree{
-		ObjectTree: t,
+		ObjectTree:        t,
-		syncClient: syncClient,
+		syncClient:        syncClient,
-		listener:   deps.Listener,
+		listener:          deps.Listener,
+		deletedNotifiable: deps.DeletedNotifiable,
 	}
 	syncHandler := newSyncTreeHandler(syncTree, syncClient)
 	syncTree.SyncHandler = syncHandler
@@ -196,8 +207,7 @@ func buildSyncTree(ctx context.Context, isFirstBuild bool, deps BuildDeps) (t tr
 }
 
 func (s *SyncTree) AddContent(ctx context.Context, content tree.SignableChangeContent) (res tree.AddResult, err error) {
-	if s.isClosed { // checkAlive err
+	if err = s.checkAlive(); err != nil {
-		err = ErrSyncTreeClosed
 		return
 	}
 	res, err = s.ObjectTree.AddContent(ctx, content)
@@ -210,8 +220,7 @@ func (s *SyncTree) AddContent(ctx context.Context, content tree.SignableChangeCo
 }
 
 func (s *SyncTree) AddRawChanges(ctx context.Context, changes ...*treechangeproto.RawTreeChangeWithId) (res tree.AddResult, err error) {
-	if s.isClosed {
+	if err = s.checkAlive(); err != nil {
-		err = ErrSyncTreeClosed
 		return
 	}
 	res, err = s.ObjectTree.AddRawChanges(ctx, changes...)
@@ -235,15 +244,44 @@ func (s *SyncTree) AddRawChanges(ctx context.Context, changes ...*treechangeprot
 	return
 }
 
+func (s *SyncTree) Delete() (err error) {
+	log.With("id", s.ID()).Debug("deleting sync tree")
+	s.Lock()
+	defer func() {
+		s.Unlock()
+		if err == nil {
+			s.deletedNotifiable.NotifyDeleted(s.ID())
+		}
+	}()
+	if err = s.checkAlive(); err != nil {
+		return
+	}
+	err = s.ObjectTree.Delete()
+	if err != nil {
+		return
+	}
+	s.isDeleted = true
+
+	return
+}
+
 func (s *SyncTree) Close() (err error) {
 	log.With("id", s.ID()).Debug("closing sync tree")
 	s.Lock()
 	defer s.Unlock()
-	log.With("id", s.ID()).Debug("taken lock on sync tree")
+	if err = s.checkAlive(); err != nil {
-	if s.isClosed {
-		err = ErrSyncTreeClosed
 		return
 	}
 	s.isClosed = true
 	return
 }
+
+func (s *SyncTree) checkAlive() (err error) {
+	if s.isClosed {
+		err = ErrSyncTreeClosed
+	}
+	if s.isDeleted {
+		err = ErrSyncTreeDeleted
+	}
+	return
+}

common/pkg/acl/storage/inmemory.go

@@ -142,6 +142,10 @@ func (t *inMemoryTreeStorage) GetRawChange(ctx context.Context, changeId string)
 	return nil, fmt.Errorf("could not get change with id: %s", changeId)
 }
 
+func (t *inMemoryTreeStorage) Delete() error {
+	return nil
+}
+
 type inMemoryStorageProvider struct {
 	objects map[string]TreeStorage
 	sync.RWMutex

common/pkg/acl/storage/treestorage.go

@@ -14,6 +14,7 @@ type TreeStorage interface {
 	AddRawChange(change *treechangeproto.RawTreeChangeWithId) error
 	GetRawChange(ctx context.Context, id string) (*treechangeproto.RawTreeChangeWithId, error)
 	HasChange(ctx context.Context, id string) (bool, error)
+	Delete() error
 }
 
 type TreeStorageCreatorFunc = func(payload TreeStorageCreatePayload) (TreeStorage, error)

common/pkg/acl/tree/changebuilder.go

@@ -48,7 +48,7 @@ type changeBuilder struct {
 	keys       *common.Keychain
 }
 
-func newChangeBuilder(keys *common.Keychain, rootChange *treechangeproto.RawTreeChangeWithId) ChangeBuilder {
+func NewChangeBuilder(keys *common.Keychain, rootChange *treechangeproto.RawTreeChangeWithId) ChangeBuilder {
 	return &changeBuilder{keys: keys, rootChange: rootChange}
 }
 

common/pkg/acl/tree/objecttree.go

@@ -57,6 +57,7 @@ type ObjectTree interface {
 	AddContent(ctx context.Context, content SignableChangeContent) (AddResult, error)
 	AddRawChanges(ctx context.Context, changes ...*treechangeproto.RawTreeChangeWithId) (AddResult, error)
 
+	Delete() error
 	Close() error
 }
 
@@ -100,7 +101,7 @@ func defaultObjectTreeDeps(
 	aclList list2.ACLList) objectTreeDeps {
 
 	keychain := common.NewKeychain()
-	changeBuilder := newChangeBuilder(keychain, rootChange)
+	changeBuilder := NewChangeBuilder(keychain, rootChange)
 	treeBuilder := newTreeBuilder(treeStorage, changeBuilder)
 	return objectTreeDeps{
 		changeBuilder:   changeBuilder,
@@ -508,6 +509,10 @@ func (ot *objectTree) Close() error {
 	return nil
 }
 
+func (ot *objectTree) Delete() error {
+	return nil
+}
+
 func (ot *objectTree) SnapshotPath() []string {
 	// TODO: Add error as return parameter
 	if ot.snapshotPathIsActual() {

common/pkg/acl/tree/objecttree_test.go

@@ -116,7 +116,7 @@ func prepareTreeContext(t *testing.T, aclList list.ACLList) testTreeContext {
 	treeStorage := changeCreator.createNewTreeStorage("0", aclList.Head().Id)
 	root, _ := treeStorage.Root()
 	changeBuilder := &mockChangeBuilder{
-		originalBuilder: newChangeBuilder(nil, root),
+		originalBuilder: NewChangeBuilder(nil, root),
 	}
 	deps := objectTreeDeps{
 		changeBuilder:   changeBuilder,

common/pkg/acl/tree/objecttreefactory.go

@@ -71,7 +71,7 @@ func createObjectTree(
 		Seed:       seed,
 	}
 
-	_, raw, err := newChangeBuilder(common.NewKeychain(), nil).BuildInitialContent(cnt)
+	_, raw, err := NewChangeBuilder(common.NewKeychain(), nil).BuildInitialContent(cnt)
 	if err != nil {
 		return
 	}

node/storage/keys.go

@@ -1,6 +1,7 @@
 package storage
 
 import (
+	"fmt"
 	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/pkg/acl/storage"
 	"strings"
 )
@@ -25,6 +26,7 @@ func (a aclKeys) RawRecordKey(id string) []byte {
 
 type treeKeys struct {
 	id       string
+	prefix   string
 	headsKey []byte
 }
 
@@ -32,6 +34,7 @@ func newTreeKeys(id string) treeKeys {
 	return treeKeys{
 		id:       id,
 		headsKey: storage.JoinStringsToBytes("t", id, "heads"),
+		prefix:   fmt.Sprintf("t/%s", id),
 	}
 }
 
@@ -43,6 +46,10 @@ func (t treeKeys) RawChangeKey(id string) []byte {
 	return storage.JoinStringsToBytes("t", t.id, id)
 }
 
+func (t treeKeys) isTreeRecordKey(key string) bool {
+	return strings.HasPrefix(key, t.prefix) && !strings.HasSuffix(key, "/heads")
+}
+
 type spaceKeys struct {
 	headerKey []byte
 }

node/storage/treestorage.go

@@ -135,3 +135,36 @@ func (t *treeStorage) GetRawChange(ctx context.Context, id string) (raw *treecha
 func (t *treeStorage) HasChange(ctx context.Context, id string) (bool, error) {
 	return t.db.Has(t.keys.RawChangeKey(id))
 }
+
+func (t *treeStorage) Delete() (err error) {
+	storedKeys, err := t.storedKeys()
+	if err != nil {
+		return
+	}
+	for _, k := range storedKeys {
+		err = t.db.Delete(k)
+		if err != nil {
+			return
+		}
+	}
+	return
+}
+
+func (t *treeStorage) storedKeys() (keys [][]byte, err error) {
+	index := t.db.Items()
+
+	key, _, err := index.Next()
+	for err == nil {
+		strKey := string(key)
+		if t.keys.isTreeRecordKey(strKey) {
+			keys = append(keys, key)
+		}
+		key, _, err = index.Next()
+	}
+
+	if err != pogreb.ErrIterationDone {
+		return
+	}
+	err = nil
+	return
+}