695 lines
22 KiB
Go
695 lines
22 KiB
Go
package protocol
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import (
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"crypto/ecdsa"
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"encoding/hex"
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"fmt"
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"github.com/pkg/errors"
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"go.uber.org/zap"
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"github.com/status-im/status-go/eth-node/crypto"
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"github.com/status-im/status-go/protocol/common"
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"github.com/status-im/status-go/protocol/encryption/multidevice"
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"github.com/status-im/status-go/protocol/protobuf"
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v1protocol "github.com/status-im/status-go/protocol/v1"
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)
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const (
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transactionRequestDeclinedMessage = "Transaction request declined"
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requestAddressForTransactionAcceptedMessage = "Request address for transaction accepted"
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requestAddressForTransactionDeclinedMessage = "Request address for transaction declined"
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)
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type MessageHandler struct {
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identity *ecdsa.PrivateKey
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persistence *sqlitePersistence
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logger *zap.Logger
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}
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func newMessageHandler(identity *ecdsa.PrivateKey, logger *zap.Logger, persistence *sqlitePersistence) *MessageHandler {
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return &MessageHandler{
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identity: identity,
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persistence: persistence,
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logger: logger}
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}
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// HandleMembershipUpdate updates a Chat instance according to the membership updates.
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// It retrieves chat, if exists, and merges membership updates from the message.
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// Finally, the Chat is updated with the new group events.
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func (m *MessageHandler) HandleMembershipUpdate(messageState *ReceivedMessageState, chat *Chat, rawMembershipUpdate protobuf.MembershipUpdateMessage, translations map[protobuf.MembershipUpdateEvent_EventType]string) error {
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var group *v1protocol.Group
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var err error
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logger := m.logger.With(zap.String("site", "HandleMembershipUpdate"))
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message, err := v1protocol.MembershipUpdateMessageFromProtobuf(&rawMembershipUpdate)
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if err != nil {
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return err
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}
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if err := ValidateMembershipUpdateMessage(message, messageState.Timesource.GetCurrentTime()); err != nil {
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logger.Warn("failed to validate message", zap.Error(err))
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return err
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}
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if chat == nil {
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if len(message.Events) == 0 {
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return errors.New("can't create new group chat without events")
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}
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group, err = v1protocol.NewGroupWithEvents(message.ChatID, message.Events)
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if err != nil {
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return err
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}
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// A new chat must contain us
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if !group.IsMember(contactIDFromPublicKey(&m.identity.PublicKey)) {
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return errors.New("can't create a new group chat without us being a member")
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}
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newChat := CreateGroupChat(messageState.Timesource)
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chat = &newChat
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} else {
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existingGroup, err := newProtocolGroupFromChat(chat)
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if err != nil {
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return errors.Wrap(err, "failed to create a Group from Chat")
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}
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updateGroup, err := v1protocol.NewGroupWithEvents(message.ChatID, message.Events)
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if err != nil {
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return errors.Wrap(err, "invalid membership update")
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}
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merged := v1protocol.MergeMembershipUpdateEvents(existingGroup.Events(), updateGroup.Events())
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group, err = v1protocol.NewGroupWithEvents(chat.ID, merged)
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if err != nil {
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return errors.Wrap(err, "failed to create a group with new membership updates")
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}
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}
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chat.updateChatFromGroupMembershipChanges(contactIDFromPublicKey(&m.identity.PublicKey), group)
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systemMessages := buildSystemMessages(message.Events, translations)
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for _, message := range systemMessages {
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messageID := message.ID
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exists, err := m.messageExists(messageID, messageState.ExistingMessagesMap)
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if err != nil {
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m.logger.Warn("failed to check message exists", zap.Error(err))
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}
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if exists {
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continue
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}
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messageState.Response.Messages = append(messageState.Response.Messages, message)
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}
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// Store in chats map as it might be a new one
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messageState.AllChats[chat.ID] = chat
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// Set in the map
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messageState.ModifiedChats[chat.ID] = true
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if message.Message != nil {
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messageState.CurrentMessageState.Message = *message.Message
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return m.HandleChatMessage(messageState)
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}
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return nil
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}
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func (m *MessageHandler) handleCommandMessage(state *ReceivedMessageState, message *Message) error {
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message.ID = state.CurrentMessageState.MessageID
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message.From = state.CurrentMessageState.Contact.ID
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message.Alias = state.CurrentMessageState.Contact.Alias
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message.SigPubKey = state.CurrentMessageState.PublicKey
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message.Identicon = state.CurrentMessageState.Contact.Identicon
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message.WhisperTimestamp = state.CurrentMessageState.WhisperTimestamp
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if err := message.PrepareContent(); err != nil {
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return fmt.Errorf("failed to prepare content: %v", err)
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}
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chat, err := m.matchChatEntity(message, state.AllChats, state.Timesource)
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if err != nil {
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return err
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}
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// If deleted-at is greater, ignore message
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if chat.DeletedAtClockValue >= message.Clock {
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return nil
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}
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// Set the LocalChatID for the message
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message.LocalChatID = chat.ID
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if c, ok := state.AllChats[chat.ID]; ok {
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chat = c
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}
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// Set the LocalChatID for the message
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message.LocalChatID = chat.ID
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// Increase unviewed count
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if !common.IsPubKeyEqual(message.SigPubKey, &m.identity.PublicKey) {
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chat.UnviewedMessagesCount++
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message.OutgoingStatus = ""
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} else {
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// Our own message, mark as sent
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message.OutgoingStatus = OutgoingStatusSent
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}
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err = chat.UpdateFromMessage(message, state.Timesource)
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if err != nil {
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return err
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}
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// Set chat active
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chat.Active = true
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// Set in the modified maps chat
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state.ModifiedChats[chat.ID] = true
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state.AllChats[chat.ID] = chat
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// Add to response
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if message != nil {
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state.Response.Messages = append(state.Response.Messages, message)
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}
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return nil
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}
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func (m *MessageHandler) HandleSyncInstallationContact(state *ReceivedMessageState, message protobuf.SyncInstallationContact) error {
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chat, ok := state.AllChats[state.CurrentMessageState.Contact.ID]
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if !ok {
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chat = OneToOneFromPublicKey(state.CurrentMessageState.PublicKey, state.Timesource)
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// We don't want to show the chat to the user
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chat.Active = false
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}
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contact, ok := state.AllContacts[message.Id]
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if !ok {
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publicKeyBytes, err := hex.DecodeString(message.Id[2:])
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if err != nil {
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return err
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}
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publicKey, err := crypto.UnmarshalPubkey(publicKeyBytes)
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if err != nil {
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return err
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}
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contact, err = buildContact(publicKey)
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if err != nil {
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return err
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}
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}
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if contact.LastUpdated < message.Clock {
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if !contact.IsAdded() {
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contact.SystemTags = append(contact.SystemTags, contactAdded)
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}
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if contact.Name != message.EnsName {
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contact.Name = message.EnsName
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contact.ENSVerified = false
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}
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contact.Photo = message.ProfileImage
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contact.LastUpdated = message.Clock
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state.ModifiedContacts[contact.ID] = true
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state.AllContacts[contact.ID] = contact
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}
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state.AllChats[chat.ID] = chat
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return nil
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}
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func (m *MessageHandler) HandleSyncInstallationPublicChat(state *ReceivedMessageState, message protobuf.SyncInstallationPublicChat) error {
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chatID := message.Id
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_, ok := state.AllChats[chatID]
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if ok {
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return nil
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}
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chat := CreatePublicChat(chatID, state.Timesource)
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state.AllChats[chat.ID] = &chat
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state.ModifiedChats[chat.ID] = true
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return nil
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}
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func (m *MessageHandler) HandleContactUpdate(state *ReceivedMessageState, message protobuf.ContactUpdate) error {
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logger := m.logger.With(zap.String("site", "HandleContactUpdate"))
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contact := state.CurrentMessageState.Contact
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chat, ok := state.AllChats[contact.ID]
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if !ok {
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chat = OneToOneFromPublicKey(state.CurrentMessageState.PublicKey, state.Timesource)
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// We don't want to show the chat to the user
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chat.Active = false
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}
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logger.Info("Handling contact update")
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if contact.LastUpdated < message.Clock {
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logger.Info("Updating contact")
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if !contact.HasBeenAdded() && contact.ID != contactIDFromPublicKey(&m.identity.PublicKey) {
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contact.SystemTags = append(contact.SystemTags, contactRequestReceived)
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}
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if contact.Name != message.EnsName {
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contact.Name = message.EnsName
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contact.ENSVerified = false
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}
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contact.Photo = message.ProfileImage
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contact.LastUpdated = message.Clock
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state.ModifiedContacts[contact.ID] = true
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state.AllContacts[contact.ID] = contact
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}
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if chat.LastClockValue < message.Clock {
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chat.LastClockValue = message.Clock
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}
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state.ModifiedChats[chat.ID] = true
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state.AllChats[chat.ID] = chat
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return nil
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}
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func (m *MessageHandler) HandlePairInstallation(state *ReceivedMessageState, message protobuf.PairInstallation) error {
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logger := m.logger.With(zap.String("site", "HandlePairInstallation"))
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if err := ValidateReceivedPairInstallation(&message, state.CurrentMessageState.WhisperTimestamp); err != nil {
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logger.Warn("failed to validate message", zap.Error(err))
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return err
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}
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installation, ok := state.AllInstallations[message.InstallationId]
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if !ok {
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return errors.New("installation not found")
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}
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metadata := &multidevice.InstallationMetadata{
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Name: message.Name,
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DeviceType: message.DeviceType,
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}
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installation.InstallationMetadata = metadata
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state.AllInstallations[message.InstallationId] = installation
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state.ModifiedInstallations[message.InstallationId] = true
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return nil
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}
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func (m *MessageHandler) HandleChatMessage(state *ReceivedMessageState) error {
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logger := m.logger.With(zap.String("site", "handleChatMessage"))
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if err := ValidateReceivedChatMessage(&state.CurrentMessageState.Message, state.CurrentMessageState.WhisperTimestamp); err != nil {
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logger.Warn("failed to validate message", zap.Error(err))
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return err
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}
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receivedMessage := &Message{
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ID: state.CurrentMessageState.MessageID,
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ChatMessage: state.CurrentMessageState.Message,
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From: state.CurrentMessageState.Contact.ID,
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Alias: state.CurrentMessageState.Contact.Alias,
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SigPubKey: state.CurrentMessageState.PublicKey,
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Identicon: state.CurrentMessageState.Contact.Identicon,
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WhisperTimestamp: state.CurrentMessageState.WhisperTimestamp,
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}
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err := receivedMessage.PrepareContent()
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if err != nil {
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return fmt.Errorf("failed to prepare message content: %v", err)
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}
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chat, err := m.matchChatEntity(receivedMessage, state.AllChats, state.Timesource)
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if err != nil {
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return err // matchChatEntity returns a descriptive error message
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}
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// If deleted-at is greater, ignore message
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if chat.DeletedAtClockValue >= receivedMessage.Clock {
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return nil
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}
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// Set the LocalChatID for the message
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receivedMessage.LocalChatID = chat.ID
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if c, ok := state.AllChats[chat.ID]; ok {
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chat = c
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}
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// Set the LocalChatID for the message
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receivedMessage.LocalChatID = chat.ID
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// Increase unviewed count
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if !common.IsPubKeyEqual(receivedMessage.SigPubKey, &m.identity.PublicKey) {
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chat.UnviewedMessagesCount++
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} else {
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// Our own message, mark as sent
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receivedMessage.OutgoingStatus = OutgoingStatusSent
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}
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err = chat.UpdateFromMessage(receivedMessage, state.Timesource)
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if err != nil {
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return err
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}
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// Set chat active
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chat.Active = true
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// Set in the modified maps chat
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state.ModifiedChats[chat.ID] = true
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state.AllChats[chat.ID] = chat
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contact := state.CurrentMessageState.Contact
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if hasENSNameChanged(contact, receivedMessage.EnsName, receivedMessage.Clock) {
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contact.ResetENSVerification(receivedMessage.Clock, receivedMessage.EnsName)
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state.ModifiedContacts[contact.ID] = true
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state.AllContacts[contact.ID] = contact
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}
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// Add to response
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state.Response.Messages = append(state.Response.Messages, receivedMessage)
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return nil
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}
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func (m *MessageHandler) HandleRequestAddressForTransaction(messageState *ReceivedMessageState, command protobuf.RequestAddressForTransaction) error {
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err := ValidateReceivedRequestAddressForTransaction(&command, messageState.CurrentMessageState.WhisperTimestamp)
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if err != nil {
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return err
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}
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message := &Message{
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ChatMessage: protobuf.ChatMessage{
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Clock: command.Clock,
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Timestamp: messageState.CurrentMessageState.WhisperTimestamp,
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Text: "Request address for transaction",
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ChatId: contactIDFromPublicKey(&m.identity.PublicKey),
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MessageType: protobuf.MessageType_ONE_TO_ONE,
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ContentType: protobuf.ChatMessage_TRANSACTION_COMMAND,
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},
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CommandParameters: &CommandParameters{
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ID: messageState.CurrentMessageState.MessageID,
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Value: command.Value,
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Contract: command.Contract,
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CommandState: CommandStateRequestAddressForTransaction,
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},
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}
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return m.handleCommandMessage(messageState, message)
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}
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func (m *MessageHandler) HandleRequestTransaction(messageState *ReceivedMessageState, command protobuf.RequestTransaction) error {
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err := ValidateReceivedRequestTransaction(&command, messageState.CurrentMessageState.WhisperTimestamp)
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if err != nil {
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return err
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}
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message := &Message{
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ChatMessage: protobuf.ChatMessage{
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Clock: command.Clock,
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Timestamp: messageState.CurrentMessageState.WhisperTimestamp,
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Text: "Request transaction",
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ChatId: contactIDFromPublicKey(&m.identity.PublicKey),
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MessageType: protobuf.MessageType_ONE_TO_ONE,
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ContentType: protobuf.ChatMessage_TRANSACTION_COMMAND,
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},
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CommandParameters: &CommandParameters{
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ID: messageState.CurrentMessageState.MessageID,
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Value: command.Value,
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Contract: command.Contract,
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CommandState: CommandStateRequestTransaction,
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Address: command.Address,
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},
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}
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return m.handleCommandMessage(messageState, message)
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}
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func (m *MessageHandler) HandleAcceptRequestAddressForTransaction(messageState *ReceivedMessageState, command protobuf.AcceptRequestAddressForTransaction) error {
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err := ValidateReceivedAcceptRequestAddressForTransaction(&command, messageState.CurrentMessageState.WhisperTimestamp)
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if err != nil {
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return err
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}
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initialMessage, err := m.persistence.MessageByID(command.Id)
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if err != nil {
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return err
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}
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if initialMessage == nil {
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return errors.New("message not found")
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}
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if initialMessage.LocalChatID != messageState.CurrentMessageState.Contact.ID {
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return errors.New("From must match")
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}
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if initialMessage.OutgoingStatus == "" {
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return errors.New("Initial message must originate from us")
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}
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if initialMessage.CommandParameters.CommandState != CommandStateRequestAddressForTransaction {
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return errors.New("Wrong state for command")
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}
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initialMessage.Clock = command.Clock
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initialMessage.Timestamp = messageState.CurrentMessageState.WhisperTimestamp
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initialMessage.Text = requestAddressForTransactionAcceptedMessage
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initialMessage.CommandParameters.Address = command.Address
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initialMessage.Seen = false
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initialMessage.CommandParameters.CommandState = CommandStateRequestAddressForTransactionAccepted
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// Hide previous message
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previousMessage, err := m.persistence.MessageByCommandID(messageState.CurrentMessageState.Contact.ID, command.Id)
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if err != nil && err != errRecordNotFound {
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return err
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}
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if previousMessage != nil {
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err = m.persistence.HideMessage(previousMessage.ID)
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if err != nil {
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return err
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}
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initialMessage.Replace = previousMessage.ID
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}
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return m.handleCommandMessage(messageState, initialMessage)
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}
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func (m *MessageHandler) HandleSendTransaction(messageState *ReceivedMessageState, command protobuf.SendTransaction) error {
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err := ValidateReceivedSendTransaction(&command, messageState.CurrentMessageState.WhisperTimestamp)
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if err != nil {
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return err
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}
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transactionToValidate := &TransactionToValidate{
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MessageID: messageState.CurrentMessageState.MessageID,
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CommandID: command.Id,
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TransactionHash: command.TransactionHash,
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FirstSeen: messageState.CurrentMessageState.WhisperTimestamp,
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Signature: command.Signature,
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Validate: true,
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From: messageState.CurrentMessageState.PublicKey,
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RetryCount: 0,
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}
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m.logger.Info("Saving transction to validate", zap.Any("transaction", transactionToValidate))
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return m.persistence.SaveTransactionToValidate(transactionToValidate)
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}
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func (m *MessageHandler) HandleDeclineRequestAddressForTransaction(messageState *ReceivedMessageState, command protobuf.DeclineRequestAddressForTransaction) error {
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err := ValidateReceivedDeclineRequestAddressForTransaction(&command, messageState.CurrentMessageState.WhisperTimestamp)
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if err != nil {
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return err
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}
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oldMessage, err := m.persistence.MessageByID(command.Id)
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if err != nil {
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return err
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}
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if oldMessage == nil {
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return errors.New("message not found")
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}
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if oldMessage.LocalChatID != messageState.CurrentMessageState.Contact.ID {
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return errors.New("From must match")
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}
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if oldMessage.OutgoingStatus == "" {
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return errors.New("Initial message must originate from us")
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}
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if oldMessage.CommandParameters.CommandState != CommandStateRequestAddressForTransaction {
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return errors.New("Wrong state for command")
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}
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oldMessage.Clock = command.Clock
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oldMessage.Timestamp = messageState.CurrentMessageState.WhisperTimestamp
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oldMessage.Text = requestAddressForTransactionDeclinedMessage
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oldMessage.Seen = false
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oldMessage.CommandParameters.CommandState = CommandStateRequestAddressForTransactionDeclined
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// Hide previous message
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err = m.persistence.HideMessage(command.Id)
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if err != nil {
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return err
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}
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oldMessage.Replace = command.Id
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return m.handleCommandMessage(messageState, oldMessage)
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}
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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")
|
|
}
|
|
|
|
if oldMessage.CommandParameters.CommandState != 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 = 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 ChatEntity, chats map[string]*Chat, timesource 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(message.SigPubKey, &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_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 != errRecordNotFound {
|
|
return false, err
|
|
}
|
|
if existingMessage != nil {
|
|
return true, nil
|
|
}
|
|
return false, nil
|
|
}
|
|
|
|
func (m *MessageHandler) HandleEmojiReaction(state *ReceivedMessageState, pbEmojiR protobuf.EmojiReaction) error {
|
|
logger := m.logger.With(zap.String("site", "HandleEmojiReaction"))
|
|
emojiReaction := &EmojiReaction{
|
|
EmojiReaction: pbEmojiR,
|
|
ID: state.CurrentMessageState.MessageID,
|
|
From: state.CurrentMessageState.Contact.ID,
|
|
SigPubKey: state.CurrentMessageState.PublicKey,
|
|
}
|
|
chat, err := m.matchChatEntity(emojiReaction, state.AllChats, state.Timesource)
|
|
if err != nil {
|
|
return err // matchChatEntity returns a descriptive error message
|
|
}
|
|
|
|
logger.Info("Handling emoji reaction")
|
|
|
|
if chat.LastClockValue < pbEmojiR.Clock {
|
|
chat.LastClockValue = pbEmojiR.Clock
|
|
}
|
|
|
|
state.ModifiedChats[chat.ID] = true
|
|
state.AllChats[chat.ID] = chat
|
|
|
|
return nil
|
|
}
|