Question cant find a way to listen for a finished rewarded add

i am making a double points for how long you were gone.

i was looking at some normal scripting videos and they extended the MonoBehaiver class with
,IUnityAdsListener
and i cant do that with VisualScripting as far as i know they also right clicked it and added a few prebuilt functions for it to call when its done, started, an error or is ready.

here is the link for the video and time of this part

and 8:22.

Also in the show Advertisement.Show with placementID,input and showListener,input node
the showListener needs a showListener and i cant find that in the type option or the node libraries or in the variables i dont know what to put in it.

can any one help with this issue of mine.

 

I use custom events.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.Advertisements;
5. using Unity.VisualScripting;
6.  
7. public class UnityAds : MonoBehaviour, IUnityAdsListener
8. {
9.     public void OnUnityAdsDidError(string message)
10.     {
11.         CustomEvent.Trigger(gameObject, "OnUnityAdsDidError", message);
12.     }
13.  
14.     public void OnUnityAdsDidFinish(string placementId, ShowResult showResult)
15.     {
16.         CustomEvent.Trigger(gameObject, "OnUnityAdsDidFinish", placementId, showResult);
17.     }
18.  
19.     public void OnUnityAdsDidStart(string placementId)
20.     {
21.         CustomEvent.Trigger(gameObject, "OnUnityAdsDidStart", placementId);
22.     }
23.  
24.     public void OnUnityAdsReady(string placementId)
25.     {
26.         CustomEvent.Trigger(gameObject, "OnUnityAdsReady", placementId);
27.     }
28.  
29.     void Start()
30.     {
31.         Advertisement.AddListener(this);
32.     }
33. }

Then the trigger is set when the ad finishes and you can do whatever from there with your rewards.