example interactor

class CloseEvent
  include Interactor
  delegate :event_type, :trip, :date, to: :context

  def call
    event = trip.last_events[event_type]
    if event.update(ended_at: date)
      context.event = result
    else
      context.fail!(message: 'error to update')
    end
  end
end

close_event = CloseEvent.call(event_type: event_type, trip: trip, date: date)
close_event.event