package protocol import ( "crypto/ecdsa" "encoding/hex" "fmt" "github.com/pkg/errors" "go.uber.org/zap" "github.com/status-im/status-go/eth-node/crypto" "github.com/status-im/status-go/eth-node/types" "github.com/status-im/status-go/images" "github.com/status-im/status-go/protocol/common" "github.com/status-im/status-go/protocol/communities" "github.com/status-im/status-go/protocol/encryption/multidevice" "github.com/status-im/status-go/protocol/protobuf" v1protocol "github.com/status-im/status-go/protocol/v1" ) const ( transactionRequestDeclinedMessage = "Transaction request declined" requestAddressForTransactionAcceptedMessage = "Request address for transaction accepted" requestAddressForTransactionDeclinedMessage = "Request address for transaction declined" ) var ErrMessageNotAllowed = errors.New("message from a non-contact") // HandleMembershipUpdate updates a Chat instance according to the membership updates. // It retrieves chat, if exists, and merges membership updates from the message. // Finally, the Chat is updated with the new group events. func (m *Messenger) HandleMembershipUpdate(messageState *ReceivedMessageState, chat *Chat, rawMembershipUpdate protobuf.MembershipUpdateMessage, translations *systemMessageTranslationsMap) error { var group *v1protocol.Group var err error logger := m.logger.With(zap.String("site", "HandleMembershipUpdate")) message, err := v1protocol.MembershipUpdateMessageFromProtobuf(&rawMembershipUpdate) if err != nil { return err } if err := ValidateMembershipUpdateMessage(message, messageState.Timesource.GetCurrentTime()); err != nil { logger.Warn("failed to validate message", zap.Error(err)) return err } allowed, err := m.isMessageAllowedFrom(messageState.CurrentMessageState.Contact.ID, chat) if err != nil { return err } if !allowed { return ErrMessageNotAllowed } //if chat.InvitationAdmin exists means we are waiting for invitation request approvement, and in that case //we need to create a new chat instance like we don't have a chat and just use a regular invitation flow if chat == nil || len(chat.InvitationAdmin) > 0 { if len(message.Events) == 0 { return errors.New("can't create new group chat without events") } //approve invitations if chat != nil && len(chat.InvitationAdmin) > 0 { groupChatInvitation := &GroupChatInvitation{ GroupChatInvitation: protobuf.GroupChatInvitation{ ChatId: message.ChatID, }, From: types.EncodeHex(crypto.FromECDSAPub(&m.identity.PublicKey)), } groupChatInvitation, err = m.persistence.InvitationByID(groupChatInvitation.ID()) if err != nil && err != common.ErrRecordNotFound { return err } if groupChatInvitation != nil { groupChatInvitation.State = protobuf.GroupChatInvitation_APPROVED err := m.persistence.SaveInvitation(groupChatInvitation) if err != nil { return err } messageState.GroupChatInvitations[groupChatInvitation.ID()] = groupChatInvitation } } group, err = v1protocol.NewGroupWithEvents(message.ChatID, message.Events) if err != nil { return err } ourKey := contactIDFromPublicKey(&m.identity.PublicKey) // A new chat must contain us if !group.IsMember(ourKey) { return errors.New("can't create a new group chat without us being a member") } newChat := CreateGroupChat(messageState.Timesource) // We set group chat inactive and create a notification instead // unless is coming from us or a contact isActive := messageState.CurrentMessageState.Contact.IsAdded() || messageState.CurrentMessageState.Contact.ID == ourKey newChat.Active = isActive chat = &newChat } else { existingGroup, err := newProtocolGroupFromChat(chat) if err != nil { return errors.Wrap(err, "failed to create a Group from Chat") } updateGroup, err := v1protocol.NewGroupWithEvents(message.ChatID, message.Events) if err != nil { return errors.Wrap(err, "invalid membership update") } merged := v1protocol.MergeMembershipUpdateEvents(existingGroup.Events(), updateGroup.Events()) group, err = v1protocol.NewGroupWithEvents(chat.ID, merged) if err != nil { return errors.Wrap(err, "failed to create a group with new membership updates") } } chat.updateChatFromGroupMembershipChanges(group) if !chat.Active { m.createMessageNotification(chat, messageState) } systemMessages := buildSystemMessages(message.Events, translations) for _, message := range systemMessages { messageID := message.ID exists, err := m.messageExists(messageID, messageState.ExistingMessagesMap) if err != nil { m.logger.Warn("failed to check message exists", zap.Error(err)) } if exists { continue } messageState.Response.AddMessage(message) } messageState.Response.AddChat(chat) // Store in chats map as it might be a new one messageState.AllChats.Store(chat.ID, chat) if message.Message != nil { messageState.CurrentMessageState.Message = *message.Message return m.HandleChatMessage(messageState) } else if message.EmojiReaction != nil { return m.HandleEmojiReaction(messageState, *message.EmojiReaction) } return nil } func (m *Messenger) createMessageNotification(chat *Chat, messageState *ReceivedMessageState) { var notificationType ActivityCenterType if chat.OneToOne() { notificationType = ActivityCenterNotificationTypeNewOneToOne } else { notificationType = ActivityCenterNotificationTypeNewPrivateGroupChat } notification := &ActivityCenterNotification{ ID: types.FromHex(chat.ID), Name: chat.Name, LastMessage: chat.LastMessage, Type: notificationType, Author: messageState.CurrentMessageState.Contact.ID, Timestamp: messageState.CurrentMessageState.WhisperTimestamp, ChatID: chat.ID, } err := m.addActivityCenterNotification(messageState, notification) if err != nil { m.logger.Warn("failed to create activity center notification", zap.Error(err)) } } func (m *Messenger) handleCommandMessage(state *ReceivedMessageState, message *common.Message) error { message.ID = state.CurrentMessageState.MessageID message.From = state.CurrentMessageState.Contact.ID message.Alias = state.CurrentMessageState.Contact.Alias message.SigPubKey = state.CurrentMessageState.PublicKey message.Identicon = state.CurrentMessageState.Contact.Identicon message.WhisperTimestamp = state.CurrentMessageState.WhisperTimestamp if err := message.PrepareContent(common.PubkeyToHex(&m.identity.PublicKey)); err != nil { return fmt.Errorf("failed to prepare content: %v", err) } chat, err := m.matchChatEntity(message) if err != nil { return err } allowed, err := m.isMessageAllowedFrom(state.CurrentMessageState.Contact.ID, chat) if err != nil { return err } if !allowed { return ErrMessageNotAllowed } // If deleted-at is greater, ignore message if chat.DeletedAtClockValue >= message.Clock { return nil } // Set the LocalChatID for the message message.LocalChatID = chat.ID if c, ok := state.AllChats.Load(chat.ID); ok { chat = c } // Set the LocalChatID for the message message.LocalChatID = chat.ID // Increase unviewed count if !common.IsPubKeyEqual(message.SigPubKey, &m.identity.PublicKey) { m.updateUnviewedCounts(chat, message.Mentioned) message.OutgoingStatus = "" } else { // Our own message, mark as sent message.OutgoingStatus = common.OutgoingStatusSent } err = chat.UpdateFromMessage(message, state.Timesource) if err != nil { return err } if !chat.Active { m.createMessageNotification(chat, state) } // Add to response state.Response.AddChat(chat) if message != nil { message.New = true state.Response.AddMessage(message) } // Set in the modified maps chat state.AllChats.Store(chat.ID, chat) return nil } func (m *Messenger) HandleSyncInstallationContact(state *ReceivedMessageState, message protobuf.SyncInstallationContact) error { chat, ok := state.AllChats.Load(state.CurrentMessageState.Contact.ID) if !ok { chat = OneToOneFromPublicKey(state.CurrentMessageState.PublicKey, state.Timesource) // We don't want to show the chat to the user chat.Active = false } contact, ok := state.AllContacts.Load(message.Id) if !ok { var err error contact, err = buildContactFromPkString(message.Id) if err != nil { return err } } if contact.LastUpdated < message.Clock { if !contact.IsAdded() { contact.SystemTags = append(contact.SystemTags, contactAdded) } if contact.Name != message.EnsName { contact.Name = message.EnsName contact.ENSVerified = false } contact.LastUpdated = message.Clock contact.LocalNickname = message.LocalNickname state.ModifiedContacts.Store(contact.ID, true) state.AllContacts.Store(contact.ID, contact) } // TODO(samyoul) remove storing of an updated reference pointer? state.AllChats.Store(chat.ID, chat) return nil } func (m *Messenger) HandleSyncInstallationPublicChat(state *ReceivedMessageState, message protobuf.SyncInstallationPublicChat) *Chat { chatID := message.Id _, ok := state.AllChats.Load(chatID) if ok { return nil } chat := CreatePublicChat(chatID, state.Timesource) timestamp := uint32(state.Timesource.GetCurrentTime() / 1000) chat.SyncedTo = timestamp chat.SyncedFrom = timestamp state.AllChats.Store(chat.ID, chat) state.Response.AddChat(chat) return chat } func (m *Messenger) HandlePinMessage(state *ReceivedMessageState, message protobuf.PinMessage) error { logger := m.logger.With(zap.String("site", "HandlePinMessage")) logger.Info("Handling pin message") pinMessage := &common.PinMessage{ PinMessage: message, // MessageID: message.MessageId, WhisperTimestamp: state.CurrentMessageState.WhisperTimestamp, From: state.CurrentMessageState.Contact.ID, SigPubKey: state.CurrentMessageState.PublicKey, Identicon: state.CurrentMessageState.Contact.Identicon, Alias: state.CurrentMessageState.Contact.Alias, } chat, err := m.matchChatEntity(pinMessage) if err != nil { return err // matchChatEntity returns a descriptive error message } pinMessage.ID, err = generatePinMessageID(&m.identity.PublicKey, pinMessage, chat) if err != nil { return err } // If deleted-at is greater, ignore message if chat.DeletedAtClockValue >= pinMessage.Clock { return nil } // Set the LocalChatID for the message pinMessage.LocalChatID = chat.ID if c, ok := state.AllChats.Load(chat.ID); ok { chat = c } // Set the LocalChatID for the message pinMessage.LocalChatID = chat.ID if chat.LastClockValue < message.Clock { chat.LastClockValue = message.Clock } state.Response.AddPinMessage(pinMessage) // Set in the modified maps chat state.Response.AddChat(chat) state.AllChats.Store(chat.ID, chat) return nil } func (m *Messenger) HandleContactUpdate(state *ReceivedMessageState, message protobuf.ContactUpdate) error { logger := m.logger.With(zap.String("site", "HandleContactUpdate")) contact := state.CurrentMessageState.Contact chat, ok := state.AllChats.Load(contact.ID) allowed, err := m.isMessageAllowedFrom(state.CurrentMessageState.Contact.ID, chat) if err != nil { return err } if !allowed { return ErrMessageNotAllowed } if !ok { chat = OneToOneFromPublicKey(state.CurrentMessageState.PublicKey, state.Timesource) // We don't want to show the chat to the user chat.Active = false } logger.Info("Handling contact update") if contact.LastUpdated < message.Clock { logger.Info("Updating contact") if !contact.HasBeenAdded() && contact.ID != contactIDFromPublicKey(&m.identity.PublicKey) { contact.SystemTags = append(contact.SystemTags, contactRequestReceived) } if contact.Name != message.EnsName { contact.Name = message.EnsName contact.ENSVerified = false } contact.LastUpdated = message.Clock state.ModifiedContacts.Store(contact.ID, true) state.AllContacts.Store(contact.ID, contact) } if chat.LastClockValue < message.Clock { chat.LastClockValue = message.Clock } state.Response.AddChat(chat) // TODO(samyoul) remove storing of an updated reference pointer? state.AllChats.Store(chat.ID, chat) return nil } func (m *Messenger) HandlePairInstallation(state *ReceivedMessageState, message protobuf.PairInstallation) error { logger := m.logger.With(zap.String("site", "HandlePairInstallation")) if err := ValidateReceivedPairInstallation(&message, state.CurrentMessageState.WhisperTimestamp); err != nil { logger.Warn("failed to validate message", zap.Error(err)) return err } installation, ok := state.AllInstallations.Load(message.InstallationId) if !ok { return errors.New("installation not found") } metadata := &multidevice.InstallationMetadata{ Name: message.Name, DeviceType: message.DeviceType, } installation.InstallationMetadata = metadata // TODO(samyoul) remove storing of an updated reference pointer? state.AllInstallations.Store(message.InstallationId, installation) state.ModifiedInstallations.Store(message.InstallationId, true) return nil } // HandleCommunityInvitation handles an community invitation func (m *Messenger) HandleCommunityInvitation(state *ReceivedMessageState, signer *ecdsa.PublicKey, invitation protobuf.CommunityInvitation, rawPayload []byte) error { if invitation.PublicKey == nil { return errors.New("invalid pubkey") } pk, err := crypto.DecompressPubkey(invitation.PublicKey) if err != nil { return err } if !common.IsPubKeyEqual(pk, &m.identity.PublicKey) { return errors.New("invitation not for us") } communityResponse, err := m.communitiesManager.HandleCommunityInvitation(signer, &invitation, rawPayload) if err != nil { return err } community := communityResponse.Community state.Response.AddCommunity(community) state.Response.CommunityChanges = append(state.Response.CommunityChanges, communityResponse.Changes) return nil } // HandleCommunityRequestToJoin handles an community request to join func (m *Messenger) HandleCommunityRequestToJoin(state *ReceivedMessageState, signer *ecdsa.PublicKey, requestToJoinProto protobuf.CommunityRequestToJoin) error { if requestToJoinProto.CommunityId == nil { return errors.New("invalid community id") } requestToJoin, err := m.communitiesManager.HandleCommunityRequestToJoin(signer, &requestToJoinProto) if err != nil { return err } state.Response.RequestsToJoinCommunity = append(state.Response.RequestsToJoinCommunity, requestToJoin) community, err := m.communitiesManager.GetByID(requestToJoinProto.CommunityId) if err != nil { return err } contactID := contactIDFromPublicKey(signer) contact, _ := state.AllContacts.Load(contactID) state.Response.AddNotification(NewCommunityRequestToJoinNotification(requestToJoin.ID.String(), community, contact)) return nil } // handleWrappedCommunityDescriptionMessage handles a wrapped community description func (m *Messenger) handleWrappedCommunityDescriptionMessage(payload []byte) (*communities.CommunityResponse, error) { return m.communitiesManager.HandleWrappedCommunityDescriptionMessage(payload) } func (m *Messenger) HandleEditMessage(response *MessengerResponse, editMessage EditMessage) error { if err := ValidateEditMessage(editMessage.EditMessage); err != nil { return err } messageID := editMessage.MessageId // Check if it's already in the response originalMessage := response.GetMessage(messageID) // otherwise pull from database if originalMessage == nil { var err error originalMessage, err = m.persistence.MessageByID(messageID) if err != nil && err != common.ErrRecordNotFound { return err } } // We don't have the original message, save the edited message if originalMessage == nil { return m.persistence.SaveEdit(editMessage) } chat, ok := m.allChats.Load(originalMessage.LocalChatID) if !ok { return errors.New("chat not found") } // Check edit is valid if originalMessage.From != editMessage.From { return errors.New("invalid edit, not the right author") } // Check that edit should be applied if originalMessage.EditedAt >= editMessage.Clock { return m.persistence.SaveEdit(editMessage) } // Update message and return it err := m.applyEditMessage(&editMessage.EditMessage, originalMessage) if err != nil { return err } if chat.LastMessage != nil && chat.LastMessage.ID == originalMessage.ID { chat.LastMessage = originalMessage err := m.saveChat(chat) if err != nil { return err } } response.AddMessage(originalMessage) response.AddChat(chat) return nil } func (m *Messenger) HandleChatMessage(state *ReceivedMessageState) error { logger := m.logger.With(zap.String("site", "handleChatMessage")) if err := ValidateReceivedChatMessage(&state.CurrentMessageState.Message, state.CurrentMessageState.WhisperTimestamp); err != nil { logger.Warn("failed to validate message", zap.Error(err)) return err } receivedMessage := &common.Message{ ID: state.CurrentMessageState.MessageID, ChatMessage: state.CurrentMessageState.Message, From: state.CurrentMessageState.Contact.ID, Alias: state.CurrentMessageState.Contact.Alias, SigPubKey: state.CurrentMessageState.PublicKey, Identicon: state.CurrentMessageState.Contact.Identicon, WhisperTimestamp: state.CurrentMessageState.WhisperTimestamp, } err := receivedMessage.PrepareContent(common.PubkeyToHex(&m.identity.PublicKey)) if err != nil { return fmt.Errorf("failed to prepare message content: %v", err) } chat, err := m.matchChatEntity(receivedMessage) if err != nil { return err // matchChatEntity returns a descriptive error message } allowed, err := m.isMessageAllowedFrom(state.CurrentMessageState.Contact.ID, chat) if err != nil { return err } if !allowed { return ErrMessageNotAllowed } // It looks like status-react created profile chats as public chats // so for now we need to check for the presence of "@" in their chatID if chat.Public() && receivedMessage.ContentType == protobuf.ChatMessage_IMAGE && !chat.ProfileUpdates() { return errors.New("images are not allowed in public chats") } // If profile updates check if author is the same as chat profile public key if chat.ProfileUpdates() && receivedMessage.From != chat.Profile { return nil } // If deleted-at is greater, ignore message if chat.DeletedAtClockValue >= receivedMessage.Clock { return nil } // Set the LocalChatID for the message receivedMessage.LocalChatID = chat.ID if c, ok := m.allChats.Load(chat.ID); ok { chat = c } // Set the LocalChatID for the message receivedMessage.LocalChatID = chat.ID // Increase unviewed count if !common.IsPubKeyEqual(receivedMessage.SigPubKey, &m.identity.PublicKey) { m.updateUnviewedCounts(chat, receivedMessage.Mentioned) } else { // Our own message, mark as sent receivedMessage.OutgoingStatus = common.OutgoingStatusSent } err = m.checkForEdits(receivedMessage) if err != nil { return err } err = chat.UpdateFromMessage(receivedMessage, m.getTimesource()) if err != nil { return err } // If the chat is not active, create a notification in the center if chat.OneToOne() && !chat.Active { m.createMessageNotification(chat, state) } // Set in the modified maps chat state.Response.AddChat(chat) // TODO(samyoul) remove storing of an updated reference pointer? m.allChats.Store(chat.ID, chat) contact := state.CurrentMessageState.Contact if receivedMessage.EnsName != "" { oldRecord, err := m.ensVerifier.Add(contact.ID, receivedMessage.EnsName, receivedMessage.Clock) if err != nil { m.logger.Warn("failed to verify ENS name", zap.Error(err)) } else if oldRecord == nil { // If oldRecord is nil, a new verification process will take place // so we reset the record contact.ENSVerified = false state.ModifiedContacts.Store(contact.ID, true) state.AllContacts.Store(contact.ID, contact) } } if receivedMessage.ContentType == protobuf.ChatMessage_COMMUNITY { m.logger.Debug("Handling community content type") communityResponse, err := m.handleWrappedCommunityDescriptionMessage(receivedMessage.GetCommunity()) if err != nil { return err } community := communityResponse.Community receivedMessage.CommunityID = community.IDString() state.Response.AddCommunity(community) state.Response.CommunityChanges = append(state.Response.CommunityChanges, communityResponse.Changes) } receivedMessage.New = true state.Response.AddMessage(receivedMessage) return nil } func (m *Messenger) addActivityCenterNotification(state *ReceivedMessageState, notification *ActivityCenterNotification) error { err := m.persistence.SaveActivityCenterNotification(notification) if err != nil { m.logger.Warn("failed to save notification", zap.Error(err)) return err } state.Response.AddActivityCenterNotification(notification) return nil } func (m *Messenger) HandleRequestAddressForTransaction(messageState *ReceivedMessageState, command protobuf.RequestAddressForTransaction) error { err := ValidateReceivedRequestAddressForTransaction(&command, messageState.CurrentMessageState.WhisperTimestamp) if err != nil { return err } message := &common.Message{ ChatMessage: protobuf.ChatMessage{ Clock: command.Clock, Timestamp: messageState.CurrentMessageState.WhisperTimestamp, Text: "Request address for transaction", ChatId: contactIDFromPublicKey(&m.identity.PublicKey), MessageType: protobuf.MessageType_ONE_TO_ONE, ContentType: protobuf.ChatMessage_TRANSACTION_COMMAND, }, CommandParameters: &common.CommandParameters{ ID: messageState.CurrentMessageState.MessageID, Value: command.Value, Contract: command.Contract, CommandState: common.CommandStateRequestAddressForTransaction, }, } return m.handleCommandMessage(messageState, message) } func (m *Messenger) HandleRequestTransaction(messageState *ReceivedMessageState, command protobuf.RequestTransaction) error { err := ValidateReceivedRequestTransaction(&command, messageState.CurrentMessageState.WhisperTimestamp) if err != nil { return err } message := &common.Message{ ChatMessage: protobuf.ChatMessage{ Clock: command.Clock, Timestamp: messageState.CurrentMessageState.WhisperTimestamp, Text: "Request transaction", ChatId: contactIDFromPublicKey(&m.identity.PublicKey), MessageType: protobuf.MessageType_ONE_TO_ONE, ContentType: protobuf.ChatMessage_TRANSACTION_COMMAND, }, CommandParameters: &common.CommandParameters{ ID: messageState.CurrentMessageState.MessageID, Value: command.Value, Contract: command.Contract, CommandState: common.CommandStateRequestTransaction, Address: command.Address, }, } return m.handleCommandMessage(messageState, message) } func (m *Messenger) HandleAcceptRequestAddressForTransaction(messageState *ReceivedMessageState, command protobuf.AcceptRequestAddressForTransaction) error { err := ValidateReceivedAcceptRequestAddressForTransaction(&command, messageState.CurrentMessageState.WhisperTimestamp) if err != nil { return err } initialMessage, err := m.persistence.MessageByID(command.Id) if err != nil { return err } if initialMessage == nil { return errors.New("message not found") } if initialMessage.LocalChatID != messageState.CurrentMessageState.Contact.ID { return errors.New("From must match") } if initialMessage.OutgoingStatus == "" { return errors.New("Initial message must originate from us") } if initialMessage.CommandParameters.CommandState != common.CommandStateRequestAddressForTransaction { return errors.New("Wrong state for command") } initialMessage.Clock = command.Clock initialMessage.Timestamp = messageState.CurrentMessageState.WhisperTimestamp initialMessage.Text = requestAddressForTransactionAcceptedMessage initialMessage.CommandParameters.Address = command.Address initialMessage.Seen = false initialMessage.CommandParameters.CommandState = common.CommandStateRequestAddressForTransactionAccepted // Hide previous message previousMessage, err := m.persistence.MessageByCommandID(messageState.CurrentMessageState.Contact.ID, command.Id) if err != nil && err != common.ErrRecordNotFound { return err } if previousMessage != nil { err = m.persistence.HideMessage(previousMessage.ID) if err != nil { return err } initialMessage.Replace = previousMessage.ID } return m.handleCommandMessage(messageState, initialMessage) } func (m *Messenger) HandleSendTransaction(messageState *ReceivedMessageState, command protobuf.SendTransaction) error { err := ValidateReceivedSendTransaction(&command, messageState.CurrentMessageState.WhisperTimestamp) if err != nil { return err } transactionToValidate := &TransactionToValidate{ MessageID: messageState.CurrentMessageState.MessageID, CommandID: command.Id, TransactionHash: command.TransactionHash, FirstSeen: messageState.CurrentMessageState.WhisperTimestamp, Signature: command.Signature, Validate: true, From: messageState.CurrentMessageState.PublicKey, RetryCount: 0, } m.logger.Info("Saving transction to validate", zap.Any("transaction", transactionToValidate)) return m.persistence.SaveTransactionToValidate(transactionToValidate) } func (m *Messenger) HandleDeclineRequestAddressForTransaction(messageState *ReceivedMessageState, command protobuf.DeclineRequestAddressForTransaction) error { err := ValidateReceivedDeclineRequestAddressForTransaction(&command, messageState.CurrentMessageState.WhisperTimestamp) if err != nil { return err } oldMessage, err := m.persistence.MessageByID(command.Id) if err != nil { return err } if oldMessage == nil { return errors.New("message not found") } if oldMessage.LocalChatID != messageState.CurrentMessageState.Contact.ID { return errors.New("From must match") } if oldMessage.OutgoingStatus == "" { return errors.New("Initial message must originate from us") } if oldMessage.CommandParameters.CommandState != common.CommandStateRequestAddressForTransaction { return errors.New("Wrong state for command") } oldMessage.Clock = command.Clock oldMessage.Timestamp = messageState.CurrentMessageState.WhisperTimestamp oldMessage.Text = requestAddressForTransactionDeclinedMessage oldMessage.Seen = false oldMessage.CommandParameters.CommandState = common.CommandStateRequestAddressForTransactionDeclined // Hide previous message err = m.persistence.HideMessage(command.Id) if err != nil { return err } oldMessage.Replace = command.Id return m.handleCommandMessage(messageState, oldMessage) } func (m *Messenger) HandleDeclineRequestTransaction(messageState *ReceivedMessageState, command protobuf.DeclineRequestTransaction) error { err := ValidateReceivedDeclineRequestTransaction(&command, messageState.CurrentMessageState.WhisperTimestamp) if err != nil { return err } oldMessage, err := m.persistence.MessageByID(command.Id) if err != nil { return err } if oldMessage == nil { return errors.New("message not found") } if oldMessage.LocalChatID != messageState.CurrentMessageState.Contact.ID { return errors.New("From must match") } if oldMessage.OutgoingStatus == "" { return errors.New("Initial message must originate from us") } if oldMessage.CommandParameters.CommandState != common.CommandStateRequestTransaction { return errors.New("Wrong state for command") } oldMessage.Clock = command.Clock oldMessage.Timestamp = messageState.CurrentMessageState.WhisperTimestamp oldMessage.Text = transactionRequestDeclinedMessage oldMessage.Seen = false oldMessage.CommandParameters.CommandState = common.CommandStateRequestTransactionDeclined // Hide previous message err = m.persistence.HideMessage(command.Id) if err != nil { return err } oldMessage.Replace = command.Id return m.handleCommandMessage(messageState, oldMessage) } func (m *Messenger) matchChatEntity(chatEntity common.ChatEntity) (*Chat, error) { if chatEntity.GetSigPubKey() == nil { m.logger.Error("public key can't be empty") return nil, errors.New("received a chatEntity with empty public key") } switch { case chatEntity.GetMessageType() == protobuf.MessageType_PUBLIC_GROUP: // For public messages, all outgoing and incoming messages have the same chatID // equal to a public chat name. chatID := chatEntity.GetChatId() chat, ok := m.allChats.Load(chatID) if !ok { return nil, errors.New("received a public chatEntity from non-existing chat") } return chat, nil case chatEntity.GetMessageType() == protobuf.MessageType_ONE_TO_ONE && common.IsPubKeyEqual(chatEntity.GetSigPubKey(), &m.identity.PublicKey): // It's a private message coming from us so we rely on Message.ChatID // If chat does not exist, it should be created to support multidevice synchronization. chatID := chatEntity.GetChatId() chat, ok := m.allChats.Load(chatID) if !ok { if len(chatID) != PubKeyStringLength { return nil, errors.New("invalid pubkey length") } bytePubKey, err := hex.DecodeString(chatID[2:]) if err != nil { return nil, errors.Wrap(err, "failed to decode hex chatID") } pubKey, err := crypto.UnmarshalPubkey(bytePubKey) if err != nil { return nil, errors.Wrap(err, "failed to decode pubkey") } chat = CreateOneToOneChat(chatID[:8], pubKey, m.getTimesource()) } return chat, nil case chatEntity.GetMessageType() == protobuf.MessageType_ONE_TO_ONE: // It's an incoming private chatEntity. ChatID is calculated from the signature. // If a chat does not exist, a new one is created and saved. chatID := contactIDFromPublicKey(chatEntity.GetSigPubKey()) chat, ok := m.allChats.Load(chatID) if !ok { // TODO: this should be a three-word name used in the mobile client chat = CreateOneToOneChat(chatID[:8], chatEntity.GetSigPubKey(), m.getTimesource()) chat.Active = false } // We set the chat as inactive and will create a notification // if it's not coming from a contact contact, ok := m.allContacts.Load(chatID) chat.Active = chat.Active || (ok && contact.IsAdded()) return chat, nil case chatEntity.GetMessageType() == protobuf.MessageType_COMMUNITY_CHAT: chatID := chatEntity.GetChatId() chat, ok := m.allChats.Load(chatID) if !ok { return nil, errors.New("received community chat chatEntity for non-existing chat") } if chat.CommunityID == "" || chat.ChatType != ChatTypeCommunityChat { return nil, errors.New("not an community chat") } var emojiReaction bool // We allow emoji reactions from anyone switch chatEntity.(type) { case *EmojiReaction: emojiReaction = true } canPost, err := m.communitiesManager.CanPost(chatEntity.GetSigPubKey(), chat.CommunityID, chat.CommunityChatID(), chatEntity.GetGrant()) if err != nil { return nil, err } if !emojiReaction && !canPost { return nil, errors.New("user can't post") } return chat, nil case chatEntity.GetMessageType() == protobuf.MessageType_PRIVATE_GROUP: // In the case of a group chatEntity, ChatID is the same for all messages belonging to a group. // It needs to be verified if the signature public key belongs to the chat. chatID := chatEntity.GetChatId() chat, ok := m.allChats.Load(chatID) if !ok { return nil, errors.New("received group chat chatEntity for non-existing chat") } theirKeyHex := contactIDFromPublicKey(chatEntity.GetSigPubKey()) myKeyHex := contactIDFromPublicKey(&m.identity.PublicKey) var theyJoined bool var iJoined bool for _, member := range chat.Members { if member.ID == theirKeyHex && member.Joined { theyJoined = true } } for _, member := range chat.Members { if member.ID == myKeyHex && member.Joined { iJoined = true } } if theyJoined && iJoined { return chat, nil } return nil, errors.New("did not find a matching group chat") default: return nil, errors.New("can not match a chat because there is no valid case") } } func (m *Messenger) messageExists(messageID string, existingMessagesMap map[string]bool) (bool, error) { if _, ok := existingMessagesMap[messageID]; ok { return true, nil } existingMessagesMap[messageID] = true // Check against the database, this is probably a bit slow for // each message, but for now might do, we'll make it faster later existingMessage, err := m.persistence.MessageByID(messageID) if err != nil && err != common.ErrRecordNotFound { return false, err } if existingMessage != nil { return true, nil } return false, nil } func (m *Messenger) HandleEmojiReaction(state *ReceivedMessageState, pbEmojiR protobuf.EmojiReaction) error { logger := m.logger.With(zap.String("site", "HandleEmojiReaction")) if err := ValidateReceivedEmojiReaction(&pbEmojiR, state.Timesource.GetCurrentTime()); err != nil { logger.Error("invalid emoji reaction", zap.Error(err)) return err } from := state.CurrentMessageState.Contact.ID emojiReaction := &EmojiReaction{ EmojiReaction: pbEmojiR, From: from, SigPubKey: state.CurrentMessageState.PublicKey, } existingEmoji, err := m.persistence.EmojiReactionByID(emojiReaction.ID()) if err != common.ErrRecordNotFound && err != nil { return err } if existingEmoji != nil && existingEmoji.Clock >= pbEmojiR.Clock { // this is not a valid emoji, ignoring return nil } chat, err := m.matchChatEntity(emojiReaction) if err != nil { return err // matchChatEntity returns a descriptive error message } // Set local chat id emojiReaction.LocalChatID = chat.ID logger.Debug("Handling emoji reaction") if chat.LastClockValue < pbEmojiR.Clock { chat.LastClockValue = pbEmojiR.Clock } state.Response.AddChat(chat) // TODO(samyoul) remove storing of an updated reference pointer? state.AllChats.Store(chat.ID, chat) // save emoji reaction err = m.persistence.SaveEmojiReaction(emojiReaction) if err != nil { return err } state.EmojiReactions[emojiReaction.ID()] = emojiReaction return nil } func (m *Messenger) HandleGroupChatInvitation(state *ReceivedMessageState, pbGHInvitations protobuf.GroupChatInvitation) error { allowed, err := m.isMessageAllowedFrom(state.CurrentMessageState.Contact.ID, nil) if err != nil { return err } if !allowed { return ErrMessageNotAllowed } logger := m.logger.With(zap.String("site", "HandleGroupChatInvitation")) if err := ValidateReceivedGroupChatInvitation(&pbGHInvitations); err != nil { logger.Error("invalid group chat invitation", zap.Error(err)) return err } groupChatInvitation := &GroupChatInvitation{ GroupChatInvitation: pbGHInvitations, SigPubKey: state.CurrentMessageState.PublicKey, } //From is the PK of author of invitation request if groupChatInvitation.State == protobuf.GroupChatInvitation_REJECTED { //rejected so From is the current user who received this rejection groupChatInvitation.From = types.EncodeHex(crypto.FromECDSAPub(&m.identity.PublicKey)) } else { //invitation request, so From is the author of message groupChatInvitation.From = state.CurrentMessageState.Contact.ID } existingInvitation, err := m.persistence.InvitationByID(groupChatInvitation.ID()) if err != common.ErrRecordNotFound && err != nil { return err } if existingInvitation != nil && existingInvitation.Clock >= pbGHInvitations.Clock { // this is not a valid invitation, ignoring return nil } // save invitation err = m.persistence.SaveInvitation(groupChatInvitation) if err != nil { return err } state.GroupChatInvitations[groupChatInvitation.ID()] = groupChatInvitation return nil } // HandleChatIdentity handles an incoming protobuf.ChatIdentity // extracts contact information stored in the protobuf and adds it to the user's contact for update. func (m *Messenger) HandleChatIdentity(state *ReceivedMessageState, ci protobuf.ChatIdentity) error { logger := m.logger.With(zap.String("site", "HandleChatIdentity")) allowed, err := m.isMessageAllowedFrom(state.CurrentMessageState.Contact.ID, nil) if err != nil { return err } if !allowed { return ErrMessageNotAllowed } contact := state.CurrentMessageState.Contact logger.Info("Handling contact update") newImages, err := m.persistence.SaveContactChatIdentity(contact.ID, &ci) if err != nil { return err } if newImages { for imageType, image := range ci.Images { if contact.Images == nil { contact.Images = make(map[string]images.IdentityImage) } contact.Images[imageType] = images.IdentityImage{Name: imageType, Payload: image.Payload} } state.ModifiedContacts.Store(contact.ID, true) state.AllContacts.Store(contact.ID, contact) } return nil } func (m *Messenger) checkForEdits(message *common.Message) error { // Check for any pending edit // If any pending edits are available and valid, apply them edits, err := m.persistence.GetEdits(message.ID, message.From) if err != nil { return err } if len(edits) == 0 { return nil } // Apply the first edit that is valid for _, e := range edits { if e.Clock >= message.Clock { // Update message and return it err := m.applyEditMessage(&e.EditMessage, message) if err != nil { return err } return nil } } return nil } func (m *Messenger) isMessageAllowedFrom(publicKey string, chat *Chat) (bool, error) { onlyFromContacts, err := m.settings.GetMessagesFromContactsOnly() if err != nil { return false, err } if !onlyFromContacts { return true, nil } // if it's from us, it's allowed if contactIDFromPublicKey(&m.identity.PublicKey) == publicKey { return true, nil } // If the chat is active, we allow it if chat != nil && chat.Active { return true, nil } // If the chat is public, we allow it if chat != nil && chat.Public() { return true, nil } contact, ok := m.allContacts.Load(publicKey) if !ok { // If it's not in contacts, we don't allow it return false, nil } // Otherwise we check if we added it return contact.IsAdded(), nil } func (m *Messenger) updateUnviewedCounts(chat *Chat, mentioned bool) { chat.UnviewedMessagesCount++ if mentioned { chat.UnviewedMentionsCount++ } }