Fix m.room.bot.options never being received by go-neb

clients/clients.go

@@ -16,6 +16,7 @@ import (
 	shellwords "github.com/mattn/go-shellwords"
 	log "github.com/sirupsen/logrus"
 	"maunium.net/go/mautrix"
+	"maunium.net/go/mautrix/event"
 	mevt "maunium.net/go/mautrix/event"
 	"maunium.net/go/mautrix/id"
 )
@@ -344,6 +345,15 @@ func (c *Clients) initClient(botClient *BotClient) error {
 	botClient.verificationSAS = &sync.Map{}
 
 	syncer := client.Syncer.(*mautrix.DefaultSyncer)
+	syncer.ParseErrorHandler = func(evt *event.Event, err error) bool {
+		// Events of type m.room.bot.options will be flagged as errors as this isn't an event type
+		// recognised by the Syncer, but we need to process them so the bot can accept options
+		// through this event (see onBotOptionsEvent)
+		if evt.Type.Type == "m.room.bot.options" {
+			return true
+		}
+		return false
+	}
 
 	nebStore := &matrix.NEBStore{
 		InMemoryStore: *mautrix.NewInMemoryStore(),
@@ -366,7 +376,7 @@ func (c *Clients) initClient(botClient *BotClient) error {
 		c.onMessageEvent(botClient, event)
 	})
 
-	syncer.OnEventType(mevt.Type{Type: "m.room.bot.options", Class: mevt.UnknownEventType}, func(_ mautrix.EventSource, event *mevt.Event) {
+	syncer.OnEventType(mevt.Type{Type: "m.room.bot.options", Class: mevt.StateEventType}, func(_ mautrix.EventSource, event *mevt.Event) {
 		c.onBotOptionsEvent(botClient.Client, event)
 	})