Check if an Auto-Renewable Subscription is still valid

Question

I would like to check the Auto Renewable Subscription status whenever I open the app.

This is to make sure that the user is still subscribed to the service. How do I

Answer 1

You can check with this function. its works with swift4

func receiptValidation() {
let SUBSCRIPTION_SECRET = "yourpasswordift"
let receiptPath = Bundle.main.appStoreReceiptURL?.path
if FileManager.default.fileExists(atPath: receiptPath!){
    var receiptData:NSData?
    do{
        receiptData = try NSData(contentsOf: Bundle.main.appStoreReceiptURL!, options: NSData.ReadingOptions.alwaysMapped)
    }
    catch{
        print("ERROR: " + error.localizedDescription)
    }
    //let receiptString = receiptData?.base64EncodedString(options: NSData.Base64EncodingOptions(rawValue: 0))
    let base64encodedReceipt = receiptData?.base64EncodedString(options: NSData.Base64EncodingOptions.endLineWithCarriageReturn)

    print(base64encodedReceipt!)


    let requestDictionary = ["receipt-data":base64encodedReceipt!,"password":SUBSCRIPTION_SECRET]

    guard JSONSerialization.isValidJSONObject(requestDictionary) else {  print("requestDictionary is not valid JSON");  return }
    do {
        let requestData = try JSONSerialization.data(withJSONObject: requestDictionary)
        let validationURLString = "https://sandbox.itunes.apple.com/verifyReceipt"  // this works but as noted above it's best to use your own trusted server
        guard let validationURL = URL(string: validationURLString) else { print("the validation url could not be created, unlikely error"); return }
        let session = URLSession(configuration: URLSessionConfiguration.default)
        var request = URLRequest(url: validationURL)
        request.httpMethod = "POST"
        request.cachePolicy = URLRequest.CachePolicy.reloadIgnoringCacheData
        let task = session.uploadTask(with: request, from: requestData) { (data, response, error) in
            if let data = data , error == nil {
                do {
                    let appReceiptJSON = try JSONSerialization.jsonObject(with: data)
                    print("success. here is the json representation of the app receipt: \(appReceiptJSON)")
                    // if you are using your server this will be a json representation of whatever your server provided
                } catch let error as NSError {
                    print("json serialization failed with error: \(error)")
                }
            } else {
                print("the upload task returned an error: \(error)")
            }
        }
        task.resume()
    } catch let error as NSError {
        print("json serialization failed with error: \(error)")
    }



}
}