IOS6 Transactions Validation

Non-consumables: Set aside the current receipts, perform a restore operation, and validate the new receipts.

To do this have a look on RestorePurchases function of PaymentManager class

Consumables: If you have saved the receipts, either on the device or on your server, revalidate the receipts after implementing your mitigation strategy. If you have not saved the receipts, you cannot validate these past transactions; you should not take any action.

When you got OnTransactionComplete action from the PaymentManager class, it contains PurchaseResult as event data. From  PurchaseResult, you can get transaction recipe, send it to your server and validate transaction there.

Note: Apple’s official recommendation to perform receipt validation is to connect to your own server, which then connects to Apple’s servers to validate the receipts.For a number of reasons, this is more secure than connecting to Apple directly.

If you do not want to use your server you can use apple server for transaction validation

After you got OnTransactionComplete action and the product state is Purchased or Restored call

using SA.IOSNative.StoreKit;
...

PaymentManager.Instance.VerifyLastPurchase(IOSInAppPurchaseManager.SANDBOX_VERIFICATION_SERVER);

The OnVerificationComplete  action will be fired with the VerificationResponse object inside

you will get action when the request is complete. Action contains IOSStoreKitVerificationResponse data, with information about transaction from apple server.

Warning: Use SANDBOX_VERIFICATION_SERVER url (https://sandbox.itunes.apple.com/verifyReceipt) during app testing  and APPLE_VERIFICATION_SERVER url  (https://buy.itunes.apple.com/verifyReceipt) on production.

So basically there is 2 scenarios how you can perform the validation for your game

1. Local Validation.

• Item was Purchased
• Use VerifyLastPurchase method
• If Verifications result is success provide content to your player

You can find basic sample bellow:

PaymentManager .OnTransactionComplete += OnTransactionComplete;
PaymentManager .OnVerificationComplete += OnVerificationComplete;


PaymentManager .Instance.BuyProduct("your.product.id1.here");


void OnTransactionComplete (PurchaseResult result) {

        Debug.Log("OnTransactionComplete: " + result.ProductIdentifier);
        Debug.Log("OnTransactionComplete: state: " + result.State);

        switch(result.State) {
        case PurchaseState.Purchased:
		case PurchaseState.Restored:
            PaymentManager.Instance.VerifyLastPurchase(IOSInAppPurchaseManager.SANDBOX_VERIFICATION_SERVER);
            break;
}


void OnVerificationComplete (VerificationResponse response) {
	if(response.status == 0) {
		Debug.Log("Transaction is valid");
		UnlockContentForProduct(response.productIdentifier);
	}
}

The validation result is represented as the VerificationResponse object.

If the status field is 0 if the receipt is valid, or one of the error codes listed  bellow:

2. Validate on your own server

• Item was Purchased
• Send the purchase data to your own server
• On your server contact Apple server and validate purchase data
• Listen for reply from your server, and provide the content if validation succeeded

Learn more here