code: func (el *ChannelEventListener) RegGettingTransactionsToApprove() *ChannelEventListener {
  	el.GettingTransactionsToApprove = make(chan struct{})
  	el.ids = append(el.ids, el.em.RegisterListener(func(data interface{}) {
  		el.GettingTransactionsToApprove <- struct{}{}
  	}, event.EventGettingTransactionsToApprove))
  	return el
  }
docs: // RegGettingTransactionsToApprove registers this listener to listen to when transactions to approve are getting fetched.