When the user wants to buy a product call the InitiatePurchase method of the IStoreController, identifying the product the user wants to buy.
// Example method called when the user presses a 'buy' button
// to start the purchase process.
public void OnPurchaseClicked(string productId) {
controller.InitiatePurchase(productId);
}
Your application will be notified asynchronously of the result, either with an invocation of ProcessPurchase for successful purchases or OnPurchaseFailed for failures.
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