How to determine if a product is owned with QT Purchasing?

Dmitriano

What method or property should I use to determine if a product is owned?

My first idea was that it is Product.status, but it only contains the information on if the product registered or not.

My second idea was that I receive a callback like onPurchaseSucceeded when my app starts, but I does not, because it is called as the response to product.purchase() call. But it is not clear what to do if a product is bought outside of the app or is already owned (before the app is started first time on a device).

Currently I am out of ideas :) and looks like I did not understood something well enough.

My QML code:

import QtPurchasing 1.14

Store {
    Product {
        id: adfreeProduct
        type: Product.Unlockable
        identifier: "adfree"

        onPurchaseSucceeded: {
            console.log(identifier + " purchase successful");
            transaction.finalize();
        }

        onPurchaseFailed: {
            console.log(identifier + " purchase failed");
            console.log("reason: "+ transaction.failureReason === Transaction.CanceledByUser ? "Canceled" : transaction.errorString);
            transaction.finalize();
        }

        onPurchaseRestored: {
            console.log(identifier + "purchase restored");
            console.log("timestamp: " + transaction.timestamp);
            transaction.finalize();
        }
    }
}

QT version 5.14.1

JonB

@Dmitriano
I truly know nothing about this, so there's no point asking me more about it, but: is https://doc.qt.io/qt-5/qtpurchasing-gettingstarted-cpp.html#restoring-previously-purchased-products to do with what you are looking for?