How to support Mraid on Project Tiny

Hello,
I'm trying to create a playable ad in Unity Tiny 0.32 and I need to use Mraid 2.0 to link to the Appstore.
I've read these two threads but I still don't really understand how to do it.

https://forum.unity.com/threads/how-to-use-ads-in-project-tiny.598900/
https://forum.unity.com/threads/missing-mraid-open-unity-playable-ads.1025725/

The first one is from 2018 and doesn't seem to work anymore.
I would love some help. Thanks

 

The old, first Tiny from 2018 was a Typescript / Javascript lib, completely different tech from current Tiny. That's why the code there is Javascript:

Code (JavaScript):

1. export class PlayableAdsTriggerSystem extends ut.ComponentSystem {
2.         OnUpdate(): void {

The latter link gives the solution: you can use a browser JS lib, and call that from your Tiny C#, which is documented in the link given in the post there, https://docs.google.com/document/d/...HfnAX-CpYLK3aOdwA/edit#heading=h.6u7xyqroin5d

That Getting Started doc is the Tiny doc in general too.

So you need a JS lib to do the mraid biz, and use the Tiny interop system to integrate it with your C# code:

Code (JavaScript):

1.  
2. mergeInto(LibraryManager.library, {
3.   MyJavaScriptFunction1: function (...) {
4.     ...
5.   },
6.   MyJavaScriptFunction2: function (...) {
7.     ...
8.   },
9.   ...
10.   MyJavaScriptFunctionN: function (...) {
11.     ...
12.   },
13. });

For parameters you need to convert the types, the doc has nice examples:

Code (JavaScript):

1. mergeInto(LibraryManager.library, {
2.  
3.   // this function prints a “Hello” message to the console
4.   PrintHello: function () {
5.     console.log("[JavaScript] PrintHello: " + "Hello");
6.   },
7.  
8.   // this function prints a string, provided as an argument, to the console
9.   PrintString: function (pStr) {
10.     var str = UTF8ToString(pStr); // create a JavaScript string from a null-terminated UTF-8 string allocated on the heap, pointed by pStr
11.     console.log("[JavaScript] PrintString: " + str);
12.   },
13.  
14.   // this function adds two numbers and returns the result
15.   AddNumbers: function (x, y) {
16.     console.log("[JavaScript] AddNumbers: " + x + " + " + y);
17.     return x + y;
18.   },

Then you declare your JS functions in C# like this and they are usable in Unity:

Code (CSharp):

1. using System;
2. using Unity.Entities;
3. using System.Runtime.InteropServices;
4.  
5. public class MySystem : SystemBase
6. {
7.  
8.     [DllImport("__Internal")]
9.     private static extern void PrintHello();
10.  
11.     [DllImport("__Internal")]
12.     private static extern void PrintString(string str);
13.  
14.     [DllImport("__Internal")]
15.     private static extern int AddNumbers(int x, int y);
16.  
17.     [DllImport("__Internal")]
18.     private static extern string ReceiveString();