Add change type and payload

commonspace/object/tree/objecttree/change.go

@@ -3,6 +3,7 @@ package objecttree
 import (
 	"errors"
 	"github.com/anytypeio/any-sync/commonspace/object/tree/treechangeproto"
+	"github.com/gogo/protobuf/proto"
 )
 
 var (
@@ -48,6 +49,11 @@ func NewChange(id string, ch *treechangeproto.TreeChange, signature []byte) *Cha
 }
 
 func NewChangeFromRoot(id string, ch *treechangeproto.RootChange, signature []byte) *Change {
+	changeInfo := &treechangeproto.TreeChangeInfo{
+		ChangeType:    ch.ChangeType,
+		ChangePayload: ch.ChangePayload,
+	}
+	data, _ := proto.Marshal(changeInfo)
 	return &Change{
 		Next:       nil,
 		AclHeadId:  ch.AclHeadId,
@@ -56,7 +62,8 @@ func NewChangeFromRoot(id string, ch *treechangeproto.RootChange, signature []by
 		Timestamp:  ch.Timestamp,
 		Identity:   string(ch.Identity),
 		Signature:  signature,
-		Data:       []byte(ch.ChangeType),
+		Data:       data,
+		Model:      changeInfo,
 	}
 }
 

commonspace/object/tree/objecttree/changebuilder.go

@@ -26,13 +26,14 @@ type BuilderContent struct {
 }
 
 type InitialContent struct {
-	AclHeadId  string
+	AclHeadId     string
-	Identity   []byte
+	Identity      []byte
-	SigningKey signingkey.PrivKey
+	SigningKey    signingkey.PrivKey
-	SpaceId    string
+	SpaceId       string
-	Seed       []byte
+	Seed          []byte
-	ChangeType string
+	ChangeType    string
-	Timestamp  int64
+	ChangePayload []byte
+	Timestamp     int64
 }
 
 type nonVerifiableChangeBuilder struct {
@@ -122,41 +123,35 @@ func (c *changeBuilder) SetRootRawChange(rawIdChange *treechangeproto.RawTreeCha
 
 func (c *changeBuilder) BuildRoot(payload InitialContent) (ch *Change, rawIdChange *treechangeproto.RawTreeChangeWithId, err error) {
 	change := &treechangeproto.RootChange{
-		AclHeadId:  payload.AclHeadId,
+		AclHeadId:     payload.AclHeadId,
-		Timestamp:  payload.Timestamp,
+		Timestamp:     payload.Timestamp,
-		Identity:   payload.Identity,
+		Identity:      payload.Identity,
-		ChangeType: payload.ChangeType,
+		ChangeType:    payload.ChangeType,
-		SpaceId:    payload.SpaceId,
+		ChangePayload: payload.ChangePayload,
-		Seed:       payload.Seed,
+		SpaceId:       payload.SpaceId,
+		Seed:          payload.Seed,
 	}
-
 	marshalledChange, err := proto.Marshal(change)
 	if err != nil {
 		return
 	}
-
 	signature, err := payload.SigningKey.Sign(marshalledChange)
 	if err != nil {
 		return
 	}
-
 	raw := &treechangeproto.RawTreeChange{
 		Payload:   marshalledChange,
 		Signature: signature,
 	}
-
 	marshalledRawChange, err := proto.Marshal(raw)
 	if err != nil {
 		return
 	}
-
 	id, err := cidutil.NewCidFromBytes(marshalledRawChange)
 	if err != nil {
 		return
 	}
-
 	ch = NewChangeFromRoot(id, change, signature)
-
 	rawIdChange = &treechangeproto.RawTreeChangeWithId{
 		RawChange: marshalledRawChange,
 		Id:        id,
@@ -184,34 +179,27 @@ func (c *changeBuilder) Build(payload BuilderContent) (ch *Change, rawIdChange *
 	} else {
 		change.ChangesData = payload.Content
 	}
-
 	marshalledChange, err := proto.Marshal(change)
 	if err != nil {
 		return
 	}
-
 	signature, err := payload.SigningKey.Sign(marshalledChange)
 	if err != nil {
 		return
 	}
-
 	raw := &treechangeproto.RawTreeChange{
 		Payload:   marshalledChange,
 		Signature: signature,
 	}
-
 	marshalledRawChange, err := proto.Marshal(raw)
 	if err != nil {
 		return
 	}
-
 	id, err := cidutil.NewCidFromBytes(marshalledRawChange)
 	if err != nil {
 		return
 	}
-
 	ch = NewChange(id, change, signature)
-
 	rawIdChange = &treechangeproto.RawTreeChangeWithId{
 		RawChange: marshalledRawChange,
 		Id:        id,
@@ -264,7 +252,6 @@ func (c *changeBuilder) unmarshallRawChange(raw *treechangeproto.RawTreeChange,
 		ch = NewChangeFromRoot(id, unmarshalled, raw.Signature)
 		return
 	}
-
 	unmarshalled := &treechangeproto.TreeChange{}
 	err = proto.Unmarshal(raw.Payload, unmarshalled)
 	if err != nil {

commonspace/object/tree/objecttree/mock_objecttree/mock_objecttree.go

@@ -82,6 +82,20 @@ func (mr *MockObjectTreeMockRecorder) AddRawChanges(arg0, arg1 interface{}) *gom
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "AddRawChanges", reflect.TypeOf((*MockObjectTree)(nil).AddRawChanges), arg0, arg1)
 }
 
+// ChangeInfo mocks base method.
+func (m *MockObjectTree) ChangeInfo() *treechangeproto.TreeChangeInfo {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "ChangeInfo")
+	ret0, _ := ret[0].(*treechangeproto.TreeChangeInfo)
+	return ret0
+}
+
+// ChangeInfo indicates an expected call of ChangeInfo.
+func (mr *MockObjectTreeMockRecorder) ChangeInfo() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "ChangeInfo", reflect.TypeOf((*MockObjectTree)(nil).ChangeInfo))
+}
+
 // ChangesAfterCommonSnapshot mocks base method.
 func (m *MockObjectTree) ChangesAfterCommonSnapshot(arg0, arg1 []string) ([]*treechangeproto.RawTreeChangeWithId, error) {
 	m.ctrl.T.Helper()

commonspace/object/tree/objecttree/objecttree.go

@@ -52,6 +52,7 @@ type ReadableObjectTree interface {
 	Id() string
 	Header() *treechangeproto.RawTreeChangeWithId
 	UnmarshalledHeader() *Change
+	ChangeInfo() *treechangeproto.TreeChangeInfo
 	Heads() []string
 	Root() *Change
 
@@ -142,6 +143,10 @@ func (ot *objectTree) UnmarshalledHeader() *Change {
 	return ot.root
 }
 
+func (ot *objectTree) ChangeInfo() *treechangeproto.TreeChangeInfo {
+	return ot.root.Model.(*treechangeproto.TreeChangeInfo)
+}
+
 func (ot *objectTree) Storage() treestorage.TreeStorage {
 	return ot.treeStorage
 }

commonspace/object/tree/objecttree/objecttreefactory.go

@@ -12,11 +12,12 @@ import (
 )
 
 type ObjectTreeCreatePayload struct {
-	SignKey     signingkey.PrivKey
+	SignKey       signingkey.PrivKey
-	ChangeType  string
+	ChangeType    string
-	SpaceId     string
+	ChangePayload []byte
-	Identity    []byte
+	SpaceId       string
-	IsEncrypted bool
+	Identity      []byte
+	IsEncrypted   bool
 }
 
 type HistoryTreeParams struct {
@@ -165,13 +166,14 @@ func createObjectTreeRoot(
 		return
 	}
 	cnt := InitialContent{
-		AclHeadId:  aclHeadId,
+		AclHeadId:     aclHeadId,
-		Identity:   payload.Identity,
+		Identity:      payload.Identity,
-		SigningKey: payload.SignKey,
+		SigningKey:    payload.SignKey,
-		SpaceId:    payload.SpaceId,
+		SpaceId:       payload.SpaceId,
-		ChangeType: payload.ChangeType,
+		ChangeType:    payload.ChangeType,
-		Timestamp:  timestamp,
+		ChangePayload: payload.ChangePayload,
-		Seed:       seed,
+		Timestamp:     timestamp,
+		Seed:          seed,
 	}
 
 	_, root, err = NewChangeBuilder(keychain.NewKeychain(), nil).BuildRoot(cnt)

commonspace/object/tree/synctree/mock_synctree/mock_synctree.go

@@ -193,6 +193,20 @@ func (mr *MockSyncTreeMockRecorder) AddRawChanges(arg0, arg1 interface{}) *gomoc
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "AddRawChanges", reflect.TypeOf((*MockSyncTree)(nil).AddRawChanges), arg0, arg1)
 }
 
+// ChangeInfo mocks base method.
+func (m *MockSyncTree) ChangeInfo() *treechangeproto.TreeChangeInfo {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "ChangeInfo")
+	ret0, _ := ret[0].(*treechangeproto.TreeChangeInfo)
+	return ret0
+}
+
+// ChangeInfo indicates an expected call of ChangeInfo.
+func (mr *MockSyncTreeMockRecorder) ChangeInfo() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "ChangeInfo", reflect.TypeOf((*MockSyncTree)(nil).ChangeInfo))
+}
+
 // ChangesAfterCommonSnapshot mocks base method.
 func (m *MockSyncTree) ChangesAfterCommonSnapshot(arg0, arg1 []string) ([]*treechangeproto.RawTreeChangeWithId, error) {
 	m.ctrl.T.Helper()

commonspace/object/tree/treechangeproto/protos/treechange.proto

@@ -16,6 +16,8 @@ message RootChange {
   bytes seed = 5;
   // Identity is a public key of the tree's creator
   bytes identity = 6;
+  // ChangePayload is a payload related to ChangeType
+  bytes changePayload = 7;
 }
 
 // TreeChange is a change of a tree
@@ -94,3 +96,9 @@ message TreeFullSyncResponse {
 message TreeErrorResponse {
   string error = 1;
 }
+
+// TreeChangeInfo is used internally in Tree implementation for ease of marshalling
+message TreeChangeInfo {
+  string changeType = 1;
+  bytes changePayload = 2;
+}

commonspace/object/tree/treechangeproto/treechange.pb.go

@@ -36,6 +36,8 @@ type RootChange struct {
 	Seed []byte `protobuf:"bytes,5,opt,name=seed,proto3" json:"seed,omitempty"`
 	// Identity is a public key of the tree's creator
 	Identity []byte `protobuf:"bytes,6,opt,name=identity,proto3" json:"identity,omitempty"`
+	// ChangePayload is a payload related to ChangeType
+	ChangePayload []byte `protobuf:"bytes,7,opt,name=changePayload,proto3" json:"changePayload,omitempty"`
 }
 
 func (m *RootChange) Reset()         { *m = RootChange{} }
@@ -113,6 +115,13 @@ func (m *RootChange) GetIdentity() []byte {
 	return nil
 }
 
+func (m *RootChange) GetChangePayload() []byte {
+	if m != nil {
+		return m.ChangePayload
+	}
+	return nil
+}
+
 // TreeChange is a change of a tree
 type TreeChange struct {
 	// TreeHeadIds are previous ids for this TreeChange
@@ -725,6 +734,59 @@ func (m *TreeErrorResponse) GetError() string {
 	return ""
 }
 
+// TreeChangeInfo is used internally in Tree implementation for ease of marshalling
+type TreeChangeInfo struct {
+	ChangeType    string `protobuf:"bytes,1,opt,name=changeType,proto3" json:"changeType,omitempty"`
+	ChangePayload []byte `protobuf:"bytes,2,opt,name=changePayload,proto3" json:"changePayload,omitempty"`
+}
+
+func (m *TreeChangeInfo) Reset()         { *m = TreeChangeInfo{} }
+func (m *TreeChangeInfo) String() string { return proto.CompactTextString(m) }
+func (*TreeChangeInfo) ProtoMessage()    {}
+func (*TreeChangeInfo) Descriptor() ([]byte, []int) {
+	return fileDescriptor_5033f0301ef9b772, []int{10}
+}
+func (m *TreeChangeInfo) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *TreeChangeInfo) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_TreeChangeInfo.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *TreeChangeInfo) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_TreeChangeInfo.Merge(m, src)
+}
+func (m *TreeChangeInfo) XXX_Size() int {
+	return m.Size()
+}
+func (m *TreeChangeInfo) XXX_DiscardUnknown() {
+	xxx_messageInfo_TreeChangeInfo.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_TreeChangeInfo proto.InternalMessageInfo
+
+func (m *TreeChangeInfo) GetChangeType() string {
+	if m != nil {
+		return m.ChangeType
+	}
+	return ""
+}
+
+func (m *TreeChangeInfo) GetChangePayload() []byte {
+	if m != nil {
+		return m.ChangePayload
+	}
+	return nil
+}
+
 func init() {
 	proto.RegisterType((*RootChange)(nil), "treechange.RootChange")
 	proto.RegisterType((*TreeChange)(nil), "treechange.TreeChange")
@@ -736,6 +798,7 @@ func init() {
 	proto.RegisterType((*TreeFullSyncRequest)(nil), "treechange.TreeFullSyncRequest")
 	proto.RegisterType((*TreeFullSyncResponse)(nil), "treechange.TreeFullSyncResponse")
 	proto.RegisterType((*TreeErrorResponse)(nil), "treechange.TreeErrorResponse")
+	proto.RegisterType((*TreeChangeInfo)(nil), "treechange.TreeChangeInfo")
 }
 
 func init() {
@@ -743,48 +806,51 @@ func init() {
 }
 
 var fileDescriptor_5033f0301ef9b772 = []byte{
-	// 656 bytes of a gzipped FileDescriptorProto
+	// 690 bytes of a gzipped FileDescriptorProto
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-	0x21, 0x99, 0x19, 0x25, 0xfe, 0x6f, 0x1b, 0xd6, 0x67, 0x1d, 0x41, 0x9f, 0x02, 0x74, 0x91, 0x47,
+	0xe8, 0x0e, 0x40, 0x32, 0xd9, 0xda, 0x6a, 0x9d, 0xa5, 0xed, 0x07, 0xe5, 0xf2, 0x06, 0xc9, 0xac,
-	0x6f, 0xb2, 0x88, 0x4b, 0x1c, 0x0b, 0xdb, 0xa8, 0x0b, 0x0b, 0x26, 0x19, 0x81, 0xc5, 0x8c, 0x7c,
+	0x54, 0xe2, 0xfc, 0xd2, 0x61, 0xbd, 0x69, 0x09, 0xfa, 0x02, 0xa0, 0x8f, 0xdc, 0x7f, 0x17, 0xfb,
-	0x7a, 0x04, 0xab, 0x1f, 0x06, 0xbd, 0x9e, 0x62, 0x65, 0xf8, 0x69, 0x80, 0x42, 0xce, 0x12, 0xa7,
+	0x5c, 0x62, 0x2e, 0x6c, 0xa3, 0x2e, 0xcc, 0x9d, 0x64, 0xb8, 0x1a, 0x2b, 0xe5, 0xd3, 0x43, 0x58,
-	0x28, 0x0e, 0xaa, 0x69, 0x81, 0xc5, 0xea, 0x95, 0xf4, 0x15, 0xdc, 0x9a, 0x42, 0x22, 0x4b, 0x13,
+	0x3d, 0x1f, 0x0d, 0x06, 0x29, 0x2b, 0xc3, 0x4f, 0x23, 0x14, 0xb2, 0x49, 0x5c, 0x4a, 0x71, 0x50,
-	0x51, 0xbc, 0xac, 0x19, 0x4e, 0x1d, 0xd4, 0xf2, 0x02, 0x8b, 0x5d, 0xa9, 0xa5, 0xfb, 0xb0, 0x8c,
+	0x4d, 0x73, 0x35, 0x56, 0xaf, 0xa4, 0x6f, 0xe1, 0x9f, 0x29, 0x24, 0xe2, 0x28, 0x14, 0xd9, 0xf9,
-	0x79, 0x9e, 0xe6, 0x13, 0xb2, 0xa6, 0x26, 0xbb, 0x5b, 0x27, 0xdb, 0x37, 0x93, 0x02, 0x8b, 0x55,
+	0x6b, 0x70, 0xea, 0xa0, 0x96, 0xe7, 0x6a, 0x6c, 0xa6, 0x96, 0xee, 0xc3, 0x32, 0x26, 0x49, 0x94,
-	0xab, 0x76, 0x5b, 0x30, 0xf7, 0x59, 0x59, 0xe5, 0x7f, 0x21, 0xb0, 0x52, 0x75, 0x83, 0xae, 0xc3,
+	0x4c, 0xc8, 0xda, 0x8a, 0xec, 0xff, 0x3a, 0xd9, 0x7e, 0x39, 0xc9, 0xd5, 0x58, 0xb5, 0x6a, 0xd7,
-	0x9c, 0x72, 0xa3, 0x7c, 0x83, 0x45, 0x40, 0x1f, 0x43, 0x6b, 0xfc, 0x48, 0x1c, 0xdb, 0x6b, 0x5c,
+	0x80, 0xb9, 0xcf, 0xa9, 0x55, 0xce, 0x17, 0x02, 0x2b, 0x55, 0x37, 0xe8, 0x3a, 0xcc, 0xa5, 0x6e,
-	0x67, 0x54, 0x65, 0x3e, 0xf5, 0xa1, 0x5d, 0x3e, 0xc2, 0xd7, 0x5c, 0x76, 0x9d, 0x86, 0xe6, 0xad,
+	0x14, 0x67, 0x30, 0x0b, 0xe8, 0x33, 0x30, 0xf2, 0x43, 0x62, 0xea, 0x76, 0xeb, 0x2e, 0xa3, 0x2a,
-	0x60, 0xfe, 0x57, 0x02, 0x6b, 0x33, 0x2c, 0xbd, 0x19, 0x31, 0xdf, 0x48, 0x71, 0xb1, 0xea, 0x13,
+	0xf2, 0xa9, 0x03, 0x9d, 0xe2, 0x10, 0x1e, 0x71, 0xd9, 0x37, 0x5b, 0x8a, 0xb7, 0x82, 0x39, 0x5f,
-	0xb9, 0x19, 0x35, 0x0f, 0xe1, 0xf6, 0x95, 0x89, 0x2a, 0x25, 0x7a, 0xa2, 0xe3, 0xdf, 0xf7, 0x22,
+	0x09, 0xac, 0x35, 0x58, 0x7a, 0x3f, 0x62, 0xbe, 0x91, 0x6c, 0x63, 0xd5, 0x27, 0x72, 0x3f, 0x6a,
-	0xd8, 0x7d, 0xf6, 0xe7, 0xd2, 0x25, 0x17, 0x97, 0x2e, 0xf9, 0x77, 0xe9, 0x92, 0x1f, 0x23, 0xd7,
+	0x9e, 0xc0, 0xbf, 0x33, 0x13, 0x4d, 0x95, 0xa8, 0x89, 0xe6, 0x5f, 0x81, 0x2c, 0x70, 0x4e, 0xb3,
-	0xba, 0x18, 0xb9, 0xd6, 0xdf, 0x91, 0x6b, 0xbd, 0x7f, 0x70, 0xcd, 0xff, 0x9b, 0xd3, 0x79, 0xfd,
+	0x61, 0x66, 0x6b, 0xf5, 0xc2, 0xf3, 0xa8, 0x76, 0xf3, 0x93, 0x99, 0x9b, 0x7f, 0xe6, 0xae, 0xd6,
-	0xf1, 0xe8, 0x7f, 0x00, 0x00, 0x00, 0xff, 0xff, 0x4e, 0xa5, 0xe2, 0x7c, 0xa1, 0x06, 0x00, 0x00,
+	0x1b, 0xee, 0xea, 0xdd, 0x97, 0xbf, 0x6f, 0x2c, 0x72, 0x75, 0x63, 0x91, 0x3f, 0x37, 0x16, 0xf9,
+	0x71, 0x6b, 0x69, 0x57, 0xb7, 0x96, 0x76, 0x7d, 0x6b, 0x69, 0x1f, 0x1e, 0xdf, 0xf1, 0x6b, 0x77,
+	0x36, 0xaf, 0x7e, 0x9e, 0xfe, 0x0d, 0x00, 0x00, 0xff, 0xff, 0x24, 0x93, 0x3b, 0x00, 0x1f, 0x07,
+	0x00, 0x00,
 }
 
 func (m *RootChange) Marshal() (dAtA []byte, err error) {
@@ -807,6 +873,13 @@ func (m *RootChange) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 	_ = i
 	var l int
 	_ = l
+	if len(m.ChangePayload) > 0 {
+		i -= len(m.ChangePayload)
+		copy(dAtA[i:], m.ChangePayload)
+		i = encodeVarintTreechange(dAtA, i, uint64(len(m.ChangePayload)))
+		i--
+		dAtA[i] = 0x3a
+	}
 	if len(m.Identity) > 0 {
 		i -= len(m.Identity)
 		copy(dAtA[i:], m.Identity)
@@ -1362,6 +1435,43 @@ func (m *TreeErrorResponse) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 	return len(dAtA) - i, nil
 }
 
+func (m *TreeChangeInfo) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *TreeChangeInfo) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *TreeChangeInfo) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if len(m.ChangePayload) > 0 {
+		i -= len(m.ChangePayload)
+		copy(dAtA[i:], m.ChangePayload)
+		i = encodeVarintTreechange(dAtA, i, uint64(len(m.ChangePayload)))
+		i--
+		dAtA[i] = 0x12
+	}
+	if len(m.ChangeType) > 0 {
+		i -= len(m.ChangeType)
+		copy(dAtA[i:], m.ChangeType)
+		i = encodeVarintTreechange(dAtA, i, uint64(len(m.ChangeType)))
+		i--
+		dAtA[i] = 0xa
+	}
+	return len(dAtA) - i, nil
+}
+
 func encodeVarintTreechange(dAtA []byte, offset int, v uint64) int {
 	offset -= sovTreechange(v)
 	base := offset
@@ -1402,6 +1512,10 @@ func (m *RootChange) Size() (n int) {
 	if l > 0 {
 		n += 1 + l + sovTreechange(uint64(l))
 	}
+	l = len(m.ChangePayload)
+	if l > 0 {
+		n += 1 + l + sovTreechange(uint64(l))
+	}
 	return n
 }
 
@@ -1650,6 +1764,23 @@ func (m *TreeErrorResponse) Size() (n int) {
 	return n
 }
 
+func (m *TreeChangeInfo) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	l = len(m.ChangeType)
+	if l > 0 {
+		n += 1 + l + sovTreechange(uint64(l))
+	}
+	l = len(m.ChangePayload)
+	if l > 0 {
+		n += 1 + l + sovTreechange(uint64(l))
+	}
+	return n
+}
+
 func sovTreechange(x uint64) (n int) {
 	return (math_bits.Len64(x|1) + 6) / 7
 }
@@ -1868,6 +1999,40 @@ func (m *RootChange) Unmarshal(dAtA []byte) error {
 				m.Identity = []byte{}
 			}
 			iNdEx = postIndex
+		case 7:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field ChangePayload", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowTreechange
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthTreechange
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthTreechange
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.ChangePayload = append(m.ChangePayload[:0], dAtA[iNdEx:postIndex]...)
+			if m.ChangePayload == nil {
+				m.ChangePayload = []byte{}
+			}
+			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := skipTreechange(dAtA[iNdEx:])
@@ -3233,6 +3398,122 @@ func (m *TreeErrorResponse) Unmarshal(dAtA []byte) error {
 	}
 	return nil
 }
+func (m *TreeChangeInfo) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowTreechange
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: TreeChangeInfo: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: TreeChangeInfo: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field ChangeType", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowTreechange
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthTreechange
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthTreechange
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.ChangeType = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field ChangePayload", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowTreechange
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthTreechange
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthTreechange
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.ChangePayload = append(m.ChangePayload[:0], dAtA[iNdEx:postIndex]...)
+			if m.ChangePayload == nil {
+				m.ChangePayload = []byte{}
+			}
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipTreechange(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthTreechange
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
 func skipTreechange(dAtA []byte) (n int, err error) {
 	l := len(dAtA)
 	iNdEx := 0

commonspace/payloads.go

@@ -14,8 +14,8 @@ import (
 )
 
 const (
-	SpaceSettingsChangeType = "reserved.spacesettings"
+	SpaceReserved         = "space.reserved"
-	SpaceDerivationScheme   = "derivation.standard"
+	SpaceDerivationScheme = "derivation.standard"
 )
 
 func storagePayloadForSpaceCreate(payload SpaceCreatePayload) (storagePayload spacestorage.SpaceStorageCreatePayload, err error) {
@@ -36,11 +36,12 @@ func storagePayloadForSpaceCreate(payload SpaceCreatePayload) (storagePayload sp
 		return
 	}
 	header := &spacesyncproto.SpaceHeader{
-		Identity:       identity,
+		Identity:           identity,
-		Timestamp:      time.Now().UnixNano(),
+		Timestamp:          time.Now().UnixNano(),
-		SpaceType:      payload.SpaceType,
+		SpaceType:          payload.SpaceType,
-		ReplicationKey: payload.ReplicationKey,
+		SpaceHeaderPayload: payload.SpacePayload,
-		Seed:           spaceHeaderSeed,
+		ReplicationKey:     payload.ReplicationKey,
+		Seed:               spaceHeaderSeed,
 	}
 	marshalled, err := header.Marshal()
 	if err != nil {
@@ -101,7 +102,7 @@ func storagePayloadForSpaceCreate(payload SpaceCreatePayload) (storagePayload sp
 		SigningKey: payload.SigningKey,
 		SpaceId:    spaceId,
 		Seed:       spaceSettingsSeed,
-		ChangeType: SpaceSettingsChangeType,
+		ChangeType: SpaceReserved,
 		Timestamp:  time.Now().UnixNano(),
 	})
 	if err != nil {
@@ -146,9 +147,10 @@ func storagePayloadForSpaceDerive(payload SpaceDerivePayload) (storagePayload sp
 
 	// preparing header and space id
 	header := &spacesyncproto.SpaceHeader{
-		Identity:       identity,
+		Identity:           identity,
-		SpaceType:      SpaceTypeDerived,
+		SpaceType:          payload.SpaceType,
-		ReplicationKey: repKey,
+		SpaceHeaderPayload: payload.SpacePayload,
+		ReplicationKey:     repKey,
 	}
 	marshalled, err := header.Marshal()
 	if err != nil {
@@ -201,7 +203,7 @@ func storagePayloadForSpaceDerive(payload SpaceDerivePayload) (storagePayload sp
 		Identity:   aclRoot.Identity,
 		SigningKey: payload.SigningKey,
 		SpaceId:    spaceId,
-		ChangeType: SpaceSettingsChangeType,
+		ChangeType: SpaceReserved,
 	})
 	if err != nil {
 		return

commonspace/space.go

@@ -52,6 +52,8 @@ type SpaceCreatePayload struct {
 	ReadKey []byte
 	// ReplicationKey is a key which is to be used to determine the node where the space should be held
 	ReplicationKey uint64
+	// SpacePayload is an arbitrary payload related to space type
+	SpacePayload []byte
 }
 
 type HandleMessage struct {
@@ -61,11 +63,11 @@ type HandleMessage struct {
 	Message  *spacesyncproto.ObjectSyncMessage
 }
 
-const SpaceTypeDerived = "derived.space"
-
 type SpaceDerivePayload struct {
 	SigningKey    signingkey.PrivKey
 	EncryptionKey encryptionkey.PrivKey
+	SpaceType     string
+	SpacePayload  []byte
 }
 
 type SpaceDescription struct {

commonspace/spacesyncproto/protos/spacesync.proto

@@ -98,6 +98,7 @@ message SpaceHeader {
     string spaceType = 3;
     uint64 replicationKey = 4;
     bytes seed = 5;
+    bytes spaceHeaderPayload = 6;
 }
 
 // RawSpaceHeader is raw header for SpaceHeader

commonspace/spacesyncproto/spacesync.pb.go

@@ -694,11 +694,12 @@ func (m *SpacePayload) GetSpaceSettingsPayloadId() string {
 
 // SpaceHeader is a header for a space
 type SpaceHeader struct {
-	Identity       []byte `protobuf:"bytes,1,opt,name=identity,proto3" json:"identity,omitempty"`
+	Identity           []byte `protobuf:"bytes,1,opt,name=identity,proto3" json:"identity,omitempty"`
-	Timestamp      int64  `protobuf:"varint,2,opt,name=timestamp,proto3" json:"timestamp,omitempty"`
+	Timestamp          int64  `protobuf:"varint,2,opt,name=timestamp,proto3" json:"timestamp,omitempty"`
-	SpaceType      string `protobuf:"bytes,3,opt,name=spaceType,proto3" json:"spaceType,omitempty"`
+	SpaceType          string `protobuf:"bytes,3,opt,name=spaceType,proto3" json:"spaceType,omitempty"`
-	ReplicationKey uint64 `protobuf:"varint,4,opt,name=replicationKey,proto3" json:"replicationKey,omitempty"`
+	ReplicationKey     uint64 `protobuf:"varint,4,opt,name=replicationKey,proto3" json:"replicationKey,omitempty"`
-	Seed           []byte `protobuf:"bytes,5,opt,name=seed,proto3" json:"seed,omitempty"`
+	Seed               []byte `protobuf:"bytes,5,opt,name=seed,proto3" json:"seed,omitempty"`
+	SpaceHeaderPayload []byte `protobuf:"bytes,6,opt,name=spaceHeaderPayload,proto3" json:"spaceHeaderPayload,omitempty"`
 }
 
 func (m *SpaceHeader) Reset()         { *m = SpaceHeader{} }
@@ -769,6 +770,13 @@ func (m *SpaceHeader) GetSeed() []byte {
 	return nil
 }
 
+func (m *SpaceHeader) GetSpaceHeaderPayload() []byte {
+	if m != nil {
+		return m.SpaceHeaderPayload
+	}
+	return nil
+}
+
 // RawSpaceHeader is raw header for SpaceHeader
 type RawSpaceHeader struct {
 	SpaceHeader []byte `protobuf:"bytes,1,opt,name=spaceHeader,proto3" json:"spaceHeader,omitempty"`
@@ -1240,72 +1248,73 @@ func init() {
 }
 
 var fileDescriptor_80e49f1f4ac27799 = []byte{
-	// 1030 bytes of a gzipped FileDescriptorProto
+	// 1042 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x94, 0x56, 0x4b, 0x6f, 0xdb, 0x46,
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x94, 0x56, 0x4f, 0x6f, 0x1b, 0x45,
-	0x10, 0x16, 0xe9, 0xa7, 0xc6, 0xb2, 0xcc, 0x6c, 0x9c, 0x44, 0x55, 0x0c, 0x45, 0x58, 0x14, 0x85,
+	0x14, 0xf7, 0x6e, 0xd2, 0x24, 0x7e, 0x71, 0x9c, 0xed, 0x34, 0x6d, 0x8d, 0x1b, 0xb9, 0xd6, 0x08,
-	0x91, 0x43, 0x1e, 0x72, 0x51, 0x20, 0x69, 0x7b, 0x48, 0x64, 0xa7, 0x11, 0x8a, 0xd4, 0xc6, 0xaa,
+	0xa1, 0xa8, 0x87, 0xb4, 0x75, 0x10, 0x52, 0x0b, 0x1c, 0x5a, 0x27, 0xa5, 0x16, 0x2a, 0x89, 0xc6,
-	0x41, 0x81, 0x02, 0x39, 0xac, 0xc9, 0xb1, 0xc4, 0x96, 0x22, 0x59, 0xee, 0xaa, 0xb6, 0x8e, 0x3d,
+	0x54, 0x48, 0x48, 0x3d, 0x4c, 0x76, 0x5f, 0xec, 0x85, 0xf5, 0xee, 0xb2, 0x33, 0x26, 0xf1, 0x91,
-	0xf5, 0xda, 0x73, 0x7b, 0xea, 0x7f, 0xe8, 0x8f, 0xe8, 0x31, 0xc7, 0x1e, 0x0b, 0xfb, 0x8f, 0x14,
+	0x13, 0x57, 0xce, 0xf0, 0x35, 0xf8, 0x10, 0x1c, 0xcb, 0x8d, 0x23, 0x4a, 0xbe, 0x08, 0x9a, 0xd9,
-	0xbb, 0x5c, 0x3e, 0x24, 0x51, 0x01, 0x7a, 0x91, 0xb9, 0xdf, 0xcc, 0x7c, 0xf3, 0xda, 0x9d, 0x31,
+	0xd9, 0x3f, 0xb6, 0xd7, 0x95, 0xb8, 0x38, 0x3b, 0xbf, 0xf7, 0xde, 0xef, 0xfd, 0x9b, 0x79, 0x2f,
-	0x3c, 0x75, 0xa3, 0xc9, 0x24, 0x0a, 0x45, 0xcc, 0x5d, 0x7c, 0xac, 0x7f, 0xc5, 0x2c, 0x74, 0xe3,
+	0xf0, 0xd4, 0x8d, 0x26, 0x93, 0x28, 0x14, 0x31, 0x77, 0xf1, 0xb1, 0xfe, 0x15, 0xb3, 0xd0, 0x8d,
-	0x24, 0x92, 0xd1, 0x63, 0xfd, 0x2b, 0x0a, 0xf4, 0x91, 0x06, 0x48, 0x3d, 0x07, 0xe8, 0x00, 0x76,
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+	0xd3, 0xa9, 0xbd, 0xbf, 0xe9, 0xd4, 0xfe, 0xb9, 0xe9, 0xd4, 0xbe, 0x6f, 0xaf, 0xfe, 0x57, 0xf1,
-	0xb3, 0xaa, 0x1f, 0x0a, 0x00, 0x00,
+	0x7c, 0x43, 0xff, 0x39, 0xfa, 0x2f, 0x00, 0x00, 0xff, 0xff, 0x13, 0xff, 0xe7, 0x17, 0x4f, 0x0a,
+	0x00, 0x00,
 }
 
 func (m *HeadSyncRange) Marshal() (dAtA []byte, err error) {
@@ -1784,6 +1793,13 @@ func (m *SpaceHeader) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 	_ = i
 	var l int
 	_ = l
+	if len(m.SpaceHeaderPayload) > 0 {
+		i -= len(m.SpaceHeaderPayload)
+		copy(dAtA[i:], m.SpaceHeaderPayload)
+		i = encodeVarintSpacesync(dAtA, i, uint64(len(m.SpaceHeaderPayload)))
+		i--
+		dAtA[i] = 0x32
+	}
 	if len(m.Seed) > 0 {
 		i -= len(m.Seed)
 		copy(dAtA[i:], m.Seed)
@@ -2387,6 +2403,10 @@ func (m *SpaceHeader) Size() (n int) {
 	if l > 0 {
 		n += 1 + l + sovSpacesync(uint64(l))
 	}
+	l = len(m.SpaceHeaderPayload)
+	if l > 0 {
+		n += 1 + l + sovSpacesync(uint64(l))
+	}
 	return n
 }
 
@@ -4041,6 +4061,40 @@ func (m *SpaceHeader) Unmarshal(dAtA []byte) error {
 				m.Seed = []byte{}
 			}
 			iNdEx = postIndex
+		case 6:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field SpaceHeaderPayload", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowSpacesync
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthSpacesync
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthSpacesync
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.SpaceHeaderPayload = append(m.SpaceHeaderPayload[:0], dAtA[iNdEx:postIndex]...)
+			if m.SpaceHeaderPayload == nil {
+				m.SpaceHeaderPayload = []byte{}
+			}
+			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := skipSpacesync(dAtA[iNdEx:])

coordinator/coordinatorclient/mock_coordinatorclient/mock_coordinatorclient.go

@@ -38,11 +38,12 @@ func (m *MockCoordinatorClient) EXPECT() *MockCoordinatorClientMockRecorder {
 }
 
 // ChangeStatus mocks base method.
-func (m *MockCoordinatorClient) ChangeStatus(arg0 context.Context, arg1 string, arg2 *treechangeproto.RawTreeChangeWithId) error {
+func (m *MockCoordinatorClient) ChangeStatus(arg0 context.Context, arg1 string, arg2 *treechangeproto.RawTreeChangeWithId) (*coordinatorproto.SpaceStatusPayload, error) {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "ChangeStatus", arg0, arg1, arg2)
-	ret0, _ := ret[0].(error)
+	ret0, _ := ret[0].(*coordinatorproto.SpaceStatusPayload)
-	return ret0
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
 }
 
 // ChangeStatus indicates an expected call of ChangeStatus.
@@ -110,10 +111,10 @@ func (mr *MockCoordinatorClientMockRecorder) SpaceSign(arg0, arg1, arg2 interfac
 }
 
 // StatusCheck mocks base method.
-func (m *MockCoordinatorClient) StatusCheck(arg0 context.Context, arg1 string) (*coordinatorproto.SpaceStatusCheckResponse, error) {
+func (m *MockCoordinatorClient) StatusCheck(arg0 context.Context, arg1 string) (*coordinatorproto.SpaceStatusPayload, error) {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "StatusCheck", arg0, arg1)
-	ret0, _ := ret[0].(*coordinatorproto.SpaceStatusCheckResponse)
+	ret0, _ := ret[0].(*coordinatorproto.SpaceStatusPayload)
 	ret1, _ := ret[1].(error)
 	return ret0, ret1
 }