Check that event is a state event.

events.go

@@ -7,7 +7,7 @@ import (
 
 // Event represents a single Matrix event.
 type Event struct {
-	StateKey  string                 `json:"state_key"`        // The state key for the event. Only present on State Events.
+	StateKey  *string                `json:"state_key,omitempty"` // The state key for the event. Only present on State Events.
 	Sender    string                 `json:"sender"`              // The user ID of the sender of the event
 	Type      string                 `json:"type"`                // The event type
 	Timestamp int                    `json:"origin_server_ts"`    // The unix timestamp when this message was sent by the origin server

room.go

@@ -13,7 +13,7 @@ func (room Room) UpdateState(event *Event) {
 	if !exists {
 		room.State[event.Type] = make(map[string]*Event)
 	}
-	room.State[event.Type][event.StateKey] = event
+	room.State[event.Type][*event.StateKey] = event
 }
 
 // GetStateEvent returns the state event for the given type/state_key combo, or nil.

sync.go

@@ -76,11 +76,13 @@ func (s *DefaultSyncer) ProcessResponse(res *RespSync, since string) (err error)
 	for roomID, roomData := range res.Rooms.Leave {
 		room := s.getOrCreateRoom(roomID)
 		for _, event := range roomData.Timeline.Events {
+			if event.StateKey != nil {
 				event.RoomID = roomID
 				room.UpdateState(&event)
 				s.notifyListeners(&event)
 			}
 		}
+	}
 	return
 }
 
@@ -110,7 +112,7 @@ func (s *DefaultSyncer) shouldProcessResponse(resp *RespSync, since string) bool
 	for roomID, roomData := range resp.Rooms.Join {
 		for i := len(roomData.Timeline.Events) - 1; i >= 0; i-- {
 			e := roomData.Timeline.Events[i]
-			if e.Type == "m.room.member" && e.StateKey == s.UserID {
+			if e.Type == "m.room.member" && *e.StateKey == s.UserID {
 				m := e.Content["membership"]
 				mship, ok := m.(string)
 				if !ok {