status-go/protocol/message_handler.go

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package protocol
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import (
"crypto/ecdsa"
"encoding/hex"
"fmt"
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"github.com/pkg/errors"
"github.com/status-im/status-go/eth-node/crypto"
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"github.com/status-im/status-go/eth-node/types"
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"github.com/status-im/status-go/images"
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"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"
"github.com/status-im/status-go/protocol/transport"
v1protocol "github.com/status-im/status-go/protocol/v1"
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"go.uber.org/zap"
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)
const (
transactionRequestDeclinedMessage = "Transaction request declined"
requestAddressForTransactionAcceptedMessage = "Request address for transaction accepted"
requestAddressForTransactionDeclinedMessage = "Request address for transaction declined"
)
type MessageHandler struct {
identity *ecdsa.PrivateKey
persistence *sqlitePersistence
transport transport.Transport
communitiesManager *communities.Manager
logger *zap.Logger
}
func newMessageHandler(identity *ecdsa.PrivateKey, logger *zap.Logger, persistence *sqlitePersistence, communitiesManager *communities.Manager, transport transport.Transport) *MessageHandler {
return &MessageHandler{
identity: identity,
persistence: persistence,
communitiesManager: communitiesManager,
transport: transport,
logger: logger}
}
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// 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 *MessageHandler) HandleMembershipUpdate(messageState *ReceivedMessageState, chat *Chat, rawMembershipUpdate protobuf.MembershipUpdateMessage, translations map[protobuf.MembershipUpdateEvent_EventType]string) 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
}
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//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")
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}
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//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 {
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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)
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if err != nil {
return err
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}
// A new chat must contain us
if !group.IsMember(contactIDFromPublicKey(&m.identity.PublicKey)) {
return errors.New("can't create a new group chat without us being a member")
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}
newChat := CreateGroupChat(messageState.Timesource)
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())
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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(contactIDFromPublicKey(&m.identity.PublicKey), group)
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.Messages = append(messageState.Response.Messages, message)
}
// Store in chats map as it might be a new one
messageState.AllChats[chat.ID] = chat
// Set in the map
messageState.ModifiedChats[chat.ID] = true
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if message.Message != nil {
messageState.CurrentMessageState.Message = *message.Message
return m.HandleChatMessage(messageState)
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} else if message.EmojiReaction != nil {
return m.HandleEmojiReaction(messageState, *message.EmojiReaction)
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}
return nil
}
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func (m *MessageHandler) 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(); err != nil {
return fmt.Errorf("failed to prepare content: %v", err)
}
chat, err := m.matchChatEntity(message, state.AllChats, state.Timesource)
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if err != nil {
return err
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}
// 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[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) {
chat.UnviewedMessagesCount++
message.OutgoingStatus = ""
} else {
// Our own message, mark as sent
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message.OutgoingStatus = common.OutgoingStatusSent
}
err = chat.UpdateFromMessage(message, state.Timesource)
if err != nil {
return err
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}
// Set chat active
chat.Active = true
// Set in the modified maps chat
state.ModifiedChats[chat.ID] = true
state.AllChats[chat.ID] = chat
// Add to response
if message != nil {
state.Response.Messages = append(state.Response.Messages, message)
}
return nil
}
func (m *MessageHandler) HandleSyncInstallationContact(state *ReceivedMessageState, message protobuf.SyncInstallationContact) error {
chat, ok := state.AllChats[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[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
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contact.LocalNickname = message.LocalNickname
state.ModifiedContacts[contact.ID] = true
state.AllContacts[contact.ID] = contact
}
state.AllChats[chat.ID] = chat
return nil
}
func (m *MessageHandler) HandleSyncInstallationPublicChat(state *ReceivedMessageState, message protobuf.SyncInstallationPublicChat) bool {
chatID := message.Id
_, ok := state.AllChats[chatID]
if ok {
return false
}
chat := CreatePublicChat(chatID, state.Timesource)
state.AllChats[chat.ID] = &chat
state.ModifiedChats[chat.ID] = true
return true
}
func (m *MessageHandler) HandleContactUpdate(state *ReceivedMessageState, message protobuf.ContactUpdate) error {
logger := m.logger.With(zap.String("site", "HandleContactUpdate"))
contact := state.CurrentMessageState.Contact
chat, ok := state.AllChats[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
}
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[contact.ID] = true
state.AllContacts[contact.ID] = contact
}
if chat.LastClockValue < message.Clock {
chat.LastClockValue = message.Clock
}
state.ModifiedChats[chat.ID] = true
state.AllChats[chat.ID] = chat
return nil
}
func (m *MessageHandler) 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[message.InstallationId]
if !ok {
return errors.New("installation not found")
}
metadata := &multidevice.InstallationMetadata{
Name: message.Name,
DeviceType: message.DeviceType,
}
installation.InstallationMetadata = metadata
state.AllInstallations[message.InstallationId] = installation
state.ModifiedInstallations[message.InstallationId] = true
return nil
}
// HandleCommunityDescription handles an community description
func (m *MessageHandler) HandleCommunityDescription(state *ReceivedMessageState, signer *ecdsa.PublicKey, description protobuf.CommunityDescription, rawPayload []byte) error {
community, err := m.communitiesManager.HandleCommunityDescriptionMessage(signer, &description, rawPayload)
if err != nil {
return err
}
state.AllCommunities[community.IDString()] = community
// If we haven't joined the org, nothing to do
if !community.Joined() {
return nil
}
// Update relevant chats names and add new ones
// Currently removal is not supported
chats := CreateCommunityChats(community, state.Timesource)
var chatIDs []string
for i, chat := range chats {
oldChat, ok := state.AllChats[chat.ID]
if !ok {
// Beware, don't use the reference in the range (i.e chat) as it's a shallow copy
state.AllChats[chat.ID] = &chats[i]
state.ModifiedChats[chat.ID] = true
chatIDs = append(chatIDs, chat.ID)
// Update name, currently is the only field is mutable
} else if oldChat.Name != chat.Name {
state.AllChats[chat.ID].Name = chat.Name
state.ModifiedChats[chat.ID] = true
}
}
// Load transport filters
filters, err := m.transport.InitPublicFilters(chatIDs)
if err != nil {
return err
}
for _, filter := range filters {
state.AllFilters[filter.ChatID] = filter
}
return nil
}
// HandleCommunityInvitation handles an community invitation
func (m *MessageHandler) 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")
}
community, err := m.communitiesManager.HandleCommunityInvitation(signer, &invitation, rawPayload)
if err != nil {
return err
}
state.AllCommunities[community.IDString()] = community
return nil
}
// HandleWrappedCommunityDescriptionMessage handles a wrapped community description
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func (m *MessageHandler) HandleWrappedCommunityDescriptionMessage(payload []byte) (*communities.Community, error) {
return m.communitiesManager.HandleWrappedCommunityDescriptionMessage(payload)
}
func (m *MessageHandler) 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
}
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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()
if err != nil {
return fmt.Errorf("failed to prepare message content: %v", err)
}
chat, err := m.matchChatEntity(receivedMessage, state.AllChats, state.Timesource)
if err != nil {
return err // matchChatEntity returns a descriptive error message
}
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// 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 := state.AllChats[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) {
chat.UnviewedMessagesCount++
} else {
// Our own message, mark as sent
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receivedMessage.OutgoingStatus = common.OutgoingStatusSent
}
err = chat.UpdateFromMessage(receivedMessage, state.Timesource)
if err != nil {
return err
}
// Set chat active
chat.Active = true
// Set in the modified maps chat
state.ModifiedChats[chat.ID] = true
state.AllChats[chat.ID] = chat
contact := state.CurrentMessageState.Contact
if hasENSNameChanged(contact, receivedMessage.EnsName, receivedMessage.Clock) {
contact.ResetENSVerification(receivedMessage.Clock, receivedMessage.EnsName)
state.ModifiedContacts[contact.ID] = true
state.AllContacts[contact.ID] = contact
}
if receivedMessage.ContentType == protobuf.ChatMessage_COMMUNITY {
m.logger.Debug("Handling community content type")
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community, err := m.HandleWrappedCommunityDescriptionMessage(receivedMessage.GetCommunity())
if err != nil {
return err
}
receivedMessage.CommunityID = community.IDString()
state.AllCommunities[community.IDString()] = community
}
// Add to response
state.Response.Messages = append(state.Response.Messages, receivedMessage)
// Create notification body to be eventually passed to `localnotifications.SendMessageNotifications()`
state.Response.Notifications = append(
state.Response.Notifications,
MessageNotificationBody{
Message: receivedMessage,
Contact: contact,
Chat: chat,
},
)
return nil
}
func (m *MessageHandler) HandleRequestAddressForTransaction(messageState *ReceivedMessageState, command protobuf.RequestAddressForTransaction) error {
err := ValidateReceivedRequestAddressForTransaction(&command, messageState.CurrentMessageState.WhisperTimestamp)
if err != nil {
return err
}
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message := &common.Message{
ChatMessage: protobuf.ChatMessage{
Clock: command.Clock,
Timestamp: messageState.CurrentMessageState.WhisperTimestamp,
Text: "Request address for transaction",
ChatId: contactIDFromPublicKey(&m.identity.PublicKey),
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MessageType: protobuf.MessageType_ONE_TO_ONE,
ContentType: protobuf.ChatMessage_TRANSACTION_COMMAND,
},
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CommandParameters: &common.CommandParameters{
ID: messageState.CurrentMessageState.MessageID,
Value: command.Value,
Contract: command.Contract,
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CommandState: common.CommandStateRequestAddressForTransaction,
},
}
return m.handleCommandMessage(messageState, message)
}
func (m *MessageHandler) HandleRequestTransaction(messageState *ReceivedMessageState, command protobuf.RequestTransaction) error {
err := ValidateReceivedRequestTransaction(&command, messageState.CurrentMessageState.WhisperTimestamp)
if err != nil {
return err
}
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message := &common.Message{
ChatMessage: protobuf.ChatMessage{
Clock: command.Clock,
Timestamp: messageState.CurrentMessageState.WhisperTimestamp,
Text: "Request transaction",
ChatId: contactIDFromPublicKey(&m.identity.PublicKey),
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MessageType: protobuf.MessageType_ONE_TO_ONE,
ContentType: protobuf.ChatMessage_TRANSACTION_COMMAND,
},
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CommandParameters: &common.CommandParameters{
ID: messageState.CurrentMessageState.MessageID,
Value: command.Value,
Contract: command.Contract,
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CommandState: common.CommandStateRequestTransaction,
Address: command.Address,
},
}
return m.handleCommandMessage(messageState, message)
}
func (m *MessageHandler) 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")
}
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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
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initialMessage.CommandParameters.CommandState = common.CommandStateRequestAddressForTransactionAccepted
// Hide previous message
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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 *MessageHandler) 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 *MessageHandler) 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")
}
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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
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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 *MessageHandler) 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")
}
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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
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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 *MessageHandler) matchChatEntity(chatEntity common.ChatEntity, chats map[string]*Chat, timesource common.TimeSource) (*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 := chats[chatID]
if chat == nil {
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 := chats[chatID]
if chat == nil {
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")
}
newChat := CreateOneToOneChat(chatID[:8], pubKey, timesource)
chat = &newChat
}
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 := chats[chatID]
if chat == nil {
// TODO: this should be a three-word name used in the mobile client
newChat := CreateOneToOneChat(chatID[:8], chatEntity.GetSigPubKey(), timesource)
chat = &newChat
}
return chat, nil
case chatEntity.GetMessageType() == protobuf.MessageType_COMMUNITY_CHAT:
chatID := chatEntity.GetChatId()
chat := chats[chatID]
if chat == nil {
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")
}
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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
}
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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 := chats[chatID]
if chat == nil {
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 *MessageHandler) 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
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}
return false, nil
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}
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func (m *MessageHandler) HandleEmojiReaction(state *ReceivedMessageState, pbEmojiR protobuf.EmojiReaction) error {
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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, state.AllChats, state.Timesource)
if err != nil {
return err // matchChatEntity returns a descriptive error message
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}
// Set local chat id
emojiReaction.LocalChatID = chat.ID
logger.Debug("Handling emoji reaction")
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if chat.LastClockValue < pbEmojiR.Clock {
chat.LastClockValue = pbEmojiR.Clock
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}
state.ModifiedChats[chat.ID] = true
state.AllChats[chat.ID] = chat
// save emoji reaction
err = m.persistence.SaveEmojiReaction(emojiReaction)
if err != nil {
return err
}
state.EmojiReactions[emojiReaction.ID()] = emojiReaction
return nil
}
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func (m *MessageHandler) HandleGroupChatInvitation(state *ReceivedMessageState, pbGHInvitations protobuf.GroupChatInvitation) error {
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 {
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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 *MessageHandler) HandleChatIdentity(state *ReceivedMessageState, ci protobuf.ChatIdentity) error {
logger := m.logger.With(zap.String("site", "HandleChatIdentity"))
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}
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}
state.ModifiedContacts[contact.ID] = true
state.AllContacts[contact.ID] = contact
}
return nil
}