Unityでアイテムの課金処理よろしく、と言われた人向け事前知識 ref: https://qiita.com/neon-izm/items/132f034821e0daf5a2e3

file0.txt

 public class PurchaseSettings
    {

        /*
            immutable purchasable item infos.
            */
        public static readonly ProductInfos IMMUTABLE_PURCHASE_ITEM_INFOS = new ProductInfos
        {
            productInfos = new ProductInfo[] {
          #if UNITY_IOS || UNITY_EDITOR
                new ProductInfo("100_coin", "100_coin_ios", true, "100coin_description"),
          #elif UNITY_ANDROID
                new ProductInfo("100_coin", "100_coin_android", true, "100coin_description"),
          #endif
            }
        };

file1.txt

//こんな感じ！
Autoya.Purchase(
                purchaseId,
                "100_coin",
                pId =>
                {

file2.txt

   private string OnTicketResponse(string ticketData)
        {
            // modify if need.
            //return ticketData;
            return "test_not_auth";
        }