Server side Receipt Validation: Need raw Apple and Google Receipts?

Unity Services
1

Hi Jeff, Team,

Firstly thank you for all your hard work with the unity IAP. Much appreciated.

Reference:

Having read this Unity - Manual: Receipt validation

I am modifying the Samples\In App Purchasing\4.0.3\In App Purchasing Sample\script\IAPDemo.cs

Specifically:

public PurchaseProcessingResult ProcessPurchase(PurchaseEventArgs e)
{
var result = validator.Validate(e.purchasedProduct.receipt);

foreach (IPurchaseReceipt productReceipt in result) {
GooglePlayReceipt google = productReceipt as GooglePlayReceipt;
if (null != google) {

SendReceiptToServerForValidation(googleReceipt);

How do I get the Google Play actual receipt googleReceipt?
The “google” variable doesn’t seem to have this specifically where can I get this information:
Google Play: A Google Play’s receipt consists of two components.

  • Signed Data: A JSON data of what the end user purchased.
  • Signature: A base64 encoded string.

}

AppleInAppPurchaseReceipt apple = productReceipt as AppleInAppPurchaseReceipt;
if (null != apple) {

Is this the right way to get the raw apple receipt?

var builder = ConfigurationBuilder.Instance(StandardPurchasingModule.Instance());
// Get a reference to IAppleConfiguration during IAP initialization.
var appleConfig = builder.Configure();
var receiptData = System.Convert.FromBase64String(appleConfig.appReceipt);
AppleReceipt appleReceipt = new AppleValidator(AppleTangle.Data()).Validate(receiptData);
>> so I can call this:
SendReceiptToServerForValidation(appleReceipt);
Note: appleReceipt: An Apple’s receipt is a base64 encoded string.

}

}

}

I hope this is clear enough, essentially, I want to validate on the server. I need to pass the receipt to the server to validate. I had a look at this: GitHub - voltrue2/in-app-purchase: A Node.js module for in-App-Purchase for iOS, Android, Amazon and Windows. which seems to be the recommended way of doing it using NodeJS. I just dont see where I can get the raw Receipts needed to pass to this script.

The raw classes seem to be

\com.unity.purchasing@4.0.3\Runtime\SecurityStub\GooglePlayReceipt.cs
\com.unity.purchasing@4.0.3\Runtime\SecurityCore\AppleReceipt.cs

Please can you help?

Thanks!

2

You mentioned "The “google” variable doesn’t seem to have this specifically", so what does it contain? What if you just use that as the parameter? Also, what is in e.purchasedProduct.receipt ? How are you debugging?

3

Hi Jeff,

Yes, you are a star, thanks that has moved me a bit…

I think what I should do is pass

e.purchasedProduct.receipt

To the server.

How are you debugging?
Right now I am printing out the receipt on screen inside the actual devices (iphone x and android pixel xl) to see what we get. I have both a server-side .NET environment and a NodeJS environment. I’ll use the NodeJS example here: GitHub - voltrue2/in-app-purchase: A Node.js module for in-App-Purchase for iOS, Android, Amazon and Windows. and pass it

e.purchasedProduct.receipt

Im guessing that is correct having not tested it… I missed this and was looking for Google / Apple specific versions.

Another look at the code inside public PurchaseProcessingResult ProcessPurchase(PurchaseEventArgs e):

string logStr = “result”;

foreach (IPurchaseReceipt productReceipt in result)
{
logStr += ("productReceipt.productID: " + productReceipt.productID);
logStr += ("productReceipt.purchaseDate: " + productReceipt.purchaseDate);
logStr += ("productReceipt.transactionID: " + productReceipt.transactionID);
GooglePlayReceipt google = productReceipt as GooglePlayReceipt;
if (null != google) {

You mentioned "The “google” variable doesn’t seem to have this specifically", so what does it contain?
GooglePlayReceipt google = productReceipt as GooglePlayReceipt;
GooglePlayReceipt is the Unity IAP class \com.unity.purchasing@4.0.3\Runtime\SecurityStub\GooglePlayReceipt.cs but I dont see these properties

  • Signed Data: A JSON data of what the end user purchased.
  • Signature: A base64 encoded string.
    GooglePlayReceipt has the following properties

logStr += ("google.purchaseState: " + google.purchaseState);
logStr += ("google.purchaseToken: " + google.purchaseToken);
logStr += ("google.orderID: " + google.orderID);
logStr += ("google.packageName: " + google.packageName);
}

AppleInAppPurchaseReceipt apple = productReceipt as AppleInAppPurchaseReceipt;
if (null != apple) {

Likewise to Google according to the documentation from Apple
I need to send the Receipt as a base64 encoded string.
AppleInAppPurchaseReceipt is the Unity IAP class
>\com.unity.purchasing@4.0.3\Runtime\SecurityCore\AppleReceipt.cs
It contains the following

logStr += ("apple.originalTransactionIdentifier: " + apple.originalTransactionIdentifier);
logStr += ("apple.subscriptionExpirationDate: " + apple.subscriptionExpirationDate);
logStr += ("apple.cancellationDate: " + apple.cancellationDate);
logStr += ("apple.quantity: " + apple.quantity);
logStr += ("apple.productType: " + apple.productType);
logStr += ("apple.isFreeTrial: " + apple.isFreeTrial);
var builder = ConfigurationBuilder.Instance(StandardPurchasingModule.Instance());

I guess my question here is this the right way to get AppleReceipt?
And do I need to send that to the server or should I just try e.purchasedProduct.receipt and see what happens?

// Get a reference to IAppleConfiguration during IAP initialization.
var appleConfig = builder.Configure();
var receiptData = System.Convert.FromBase64String(appleConfig.appReceipt);
AppleReceipt receipt = new AppleValidator(AppleTangle.Data()).Validate(receiptData);
}

// this prints everything on the device
SetErrorMessage(logStr);

}

  • Thanks again.
4

@ironunity2020 You are welcome! I am also debugging a receipt issue at the moment, I’ll confirm your questions when I can. It’s my understanding is that the iOS receipt object is already base64 encoded