question

For Steam, as a result of the PayForPurchase call, PlayFab uses the web methods provided by Steam to initiate the purchase in that service. This automatically causes the user to be presented with the purchase confirmation dialog via the Steam client. Have you confirmed the purchase on steam before calling the ConfirmPurchase API? Please refer to this document for more detail: Establishing the payment provider: Non-webhook providers.

Here is my current code. @Rick

@Rick Chen

   public string PLAYFAB_TITLE_ID = "XXX";
    SteamManager s_SteamManager;


    protected Callback<MicroTxnAuthorizationResponse_t> m_MicroTxnAuthorizationResponse;


#if UNITY_EDITOR || UNITY_STANDALONE
    public void Start()
    {
        s_SteamManager = GetComponent<SteamManager>();


        string name = SteamFriends.GetPersonaName();
        Debug.Log($"STEAM NAME {name}");


        m_MicroTxnAuthorizationResponse = Callback<MicroTxnAuthorizationResponse_t>.Create(OnMicroTxnAuthorizationResponse);


    }


    public void Update()
    {
        if(Input.GetKeyDown(KeyCode.P))
        {
            StartPurchase();
        }
    }


    private void OnMicroTxnAuthorizationResponse(MicroTxnAuthorizationResponse_t pCallback)
    {


        if (pCallback.m_bAuthorized == 1)
        {
            Debug.Log("Payment Authorized");


            ConfirmPurchase(pCallback.m_ulOrderID.ToString());
        }
        else    
            Debug.Log("Failed to authorize payment");
        
    }




    #region  IAP
    [Button]
    public void StartPurchase()
    {
        PlayFabClientAPI.StartPurchase(new StartPurchaseRequest()
        {
            CatalogVersion = "XXX",
            Items = new List<ItemPurchaseRequest>() {
        new ItemPurchaseRequest() {
            ItemId = "XXX",
            Quantity = 1,
            Annotation = "Purchased via in-game store"
        }
    }
        }, result => {
            // Handle success
            PayForPurchase(result.OrderId);
        }, error => {
            Debug.Log($"Error Checking out with steam. \n" +
               $"{error.ErrorMessage} \n" +
                $"{error.ErrorDetails} \n" +
                $"{error.Error}");
        });
    }


    public void PayForPurchase(string order)
    {
        PlayFabClientAPI.PayForPurchase(new PayForPurchaseRequest()
        {
            OrderId = order,
            ProviderName = "Steam",
            Currency = "RM"
        }, result => {
            //Call steam to start payment?
        }, error => {
            Debug.Log($"Error Paying for  with steam.\n" +
                $"{error.ErrorMessage} \n" +
                $"{error.ErrorDetails} \n" +
                $"{error.Error}");
        });
    }


    public void ConfirmPurchase(string order)
    {
        PlayFabClientAPI.ConfirmPurchase(new ConfirmPurchaseRequest()
        {
            OrderId = order
        }, result => {
            Debug.Log($"Congrats you bought with steam.");
        }, error => {
            Debug.Log($"Error buying  with steam.\n" +
                $"{error.ErrorMessage} \n" +
                $"{error.ErrorDetails} \n" +
                $"{error.Error}");
        });
    }


    #endregion


#endif