Seq[Try[A]]

seq-try.scala

val trys: Seq[Try[CreateChatRequest]] = foo
trys.find(_.isFailure) match {
  case Some(error) => ChatsCreateFailed(sid, tid, error.toString)
  case None =>
    val reqs = trys.map(_.get)
    store.addChats(sid, tid, reqs) match {
      case Success(chats) => ChatsCreateFinished(sid, tid, chats)
      case Failure(error) => ChatsCreateFailed(sid, tid, error.toString)
    }
}