golang waiting for instance to trigger event

type Wait interface {
 // Register waits returns a chan that waits on the given ID.
 // The chan will be triggered when Trigger is called with
 // the same ID.
 Register(id uint64) <-chan interface{}
 // Trigger triggers the waiting chans with the given ID.
 Trigger(id uint64, x interface{})
 IsRegistered(id uint64) bool
}
 
type list struct {
 l 
 m map[uint64]chan interface{}
}
 
func Newlist() Wait {
 return &list{m : make(map[uint64]chan interface{})}
} 
 
//registerfunc (w *list) Register(id uint64) <-chan interface{} {
 ()
 defer ()
 ch := [id]
 if ch != nil {
  ("dup id error")
  return nil
 }
 ch = make(chan interface{},1)
 [id] = ch
 return ch
}
 
//triggerfunc (w *list) Trigger(id uint64, x interface{}) {
 ()
 ch := [id]
 delete(,id)
 ()
 if ch != nil {
  ch <- x
  close(ch)
 }
}
 
//Discern whether the id is registeredfunc (w *list) IsRegistered(id uint64) bool {
 ()
 defer ()
 _,ok := [id]
 return ok
}

var timeOutDuration = *10 
func main() {
	list := Newlist()
	rid := uint64(().UnixNano())
	go func() {
		ch := (rid)
		("start register:",rid)
		if ch == nil {
			return
		}
		select {
		case x := <- ch:
			("trigger over id:%d,x:%v\n",rid,x)
		case <-(timeOutDuration):
			("timeout error:",rid)
		}
	}()
	()
 
	rid2 := uint64(().UnixNano())
	go func() {
		ch := (rid2)
		("start register:",rid2)
		if ch == nil {
			return
		}
		select {
		case x := <- ch:
			("trigger over id:%d,x:%v\n",rid2,x)
		case <-(timeOutDuration):
			("timeout error:",rid2)
		}
	}()
 
	go func() {
		(*5)
		(rid,"Hello")
		(*3)
		(rid2,"World")
	}()
 
	select {
 
	}
}
 

package main
import (
 "fmt"
 "time"
)

func main() {
 (())

 //Wait for 1 second ( * 1)
 (())

 //Wait for 1 second <-( * 1)
 (())
}