intfs

type MonitorService interface {
	GetCurrentBlockNumber() *big.Int
	RegisterDeadline(deadline monitor.Deadline) monitor.CallbackID
	Monitor(cfg *monitor.Config, callback func(monitor.CallbackID, types.Log) bool) (monitor.CallbackID, error)
	RemoveDeadline(id monitor.CallbackID)
	RemoveEvent(id monitor.CallbackID)
	Close()
}