IsValidateApplePurchase

public BackendReturnObject IsValidateApplePurchase(string receipt, string receiptDescription);

Invalid special characters

Special Character	Description
'	Single quotation mark
\	Backslash

Valid special characters

Special Character	Description
.	Period
,	Comma
"	Double quotation mark
()	Parentheses
!	Exclamation mark
?	Question mark
~	Tilde
@	At sign
*	Asterisk
+	Plus
-	Hyphen
/	Slash

If you are using special characters that are not listed above, manually check that the receipt verification works properly before applying.

Parameters

Value	Type	Description
receipt	string	Purchasing.PurchaseEventArgs.purchasedProduct.receipt
receiptDescription	string	Additional details to be stored

Description

IStoreListener.ProcessPurchase() in the IAP service supported by Unity accepts the receipt for the purchased product and verifies it via the BACKND server.

• BACKND verifies the validity of the receipt itself and the purchased productId.
• You must be logged in to BACKND to use its verification function.
• Apple receipt verification supports normal product receipts only. It does not support subscription product receipts.

To verify Apple receipts, Apple Console must be configured. For more information, please refer to the Apple Payment Console Settings documentation.

Example

// example
// unity iap servcie process 
public PurchaseProcessingResult ProcessPurchase(PurchaseEventArgs args) 
{
    /*
    Processing BACKND receipt verification
    */
    BackendReturnObject validation = Backend.Receipt.IsValidateApplePurchase(args.purchasedProduct.receipt , "receiptDescription");

    // When receipt verification is successful
    if(validation.IsSuccess())
    {
        // Check the product ID and provide rewards accordingly. 
        // A consumable product has been purchased by this user.  
        if(string.Equals(args.purchasedProduct.definition.id, kProductIDConsumable, StringComparison.Ordinal))
        {
            Debug.Log(string.Format("ProcessPurchase: PASS. Product: '{0}'", args.purchasedProduct.definition.id));
            // The consumable item has been successfully purchased, add 100 coins to the player's in-game score.  
            ScoreManager.score += 100;
        }
        // Or ... a non-consumable product has been purchased by this user.  
        else if(string.Equals(args.purchasedProduct.definition.id, kProductIDNonConsumable, StringComparison.Ordinal))
        {
            Debug.Log(string.Format("ProcessPurchase: PASS. Product: '{0}'", args.purchasedProduct.definition.id));
            // TODO: The non-consumable item has been successfully purchased, grant this item to the player.  
        }
        // Or ... a subscription product has been purchased by this user.  
        else if(string.Equals(args.purchasedProduct.definition.id, kProductIDSubscription, StringComparison.Ordinal))
        {
            Debug.Log(string.Format("ProcessPurchase: PASS. Product: '{0}'", args.purchasedProduct.definition.id));
            // TODO: The subscription item has been successfully purchased, grant this to the player.  
        }
    }
    // When receipt verification fails 
    else 
    {
        // Or ... an unknown product has been purchased by this user. Fill in additional products here....  
        Debug.Log(string.Format("ProcessPurchase: FAIL. Unrecognized product: '{0}'", args.purchasedProduct.definition.id));
    }

    // Return a flag indicating whether this product has completely been received, or if the application needs 
    // to be reminded of this purchase at next app launch. Use PurchaseProcessingResult.Pending when still 
    // saving purchased products to the cloud, and when that save is delayed. 
    return PurchaseProcessingResult.Complete;
}

Return cases

Success cases

When successful
statusCode : 201
message : Success returnValue : {"usedDate":"2018-10-15T05:17:49Z"}

Error cases

Expired receipt token
statusCode : 400
errorCode : BadParameterException
message : bad token, Invalid token

Tampered/forged receipt token
statusCode : 400
errorCode : BadParameterException
message : bad token, Invalid token

Receipt of refund/cancellation
statusCode : 402
errorCode : AbnormalReceipt
message : This receipt has changed status. purchaseState: cancelled

Already used receipt token
statusCode : 409
errorCode : UsedReceipt
message : This receipt has already been used. usedDate: 2018-02-15T04:01:50.000Z