ios 应用内订阅 - Original_transaction_id 何时更改

iOS 应用内订阅 - Original_transaction_id 何时更改？

swift
import StoreKit
func getOriginalTransactionID() {
    if let receiptURL = Bundle.main.appStoreReceiptURL,
       let receiptData = try? Data(contentsOf: receiptURL) {
        let receipt = receiptData.base64EncodedString(options: [])
        let requestContents = ["receipt-data": receipt]
        do {
            let requestData = try JSONSerialization.data(withJSONObject: requestContents, options: [])
            let storeURL = URL(string: "https://sandbox.itunes.apple.com/verifyReceipt")!
            var storeRequest = URLRequest(url: storeURL)
            storeRequest.httpMethod = "POST"
            storeRequest.httpBody = requestData
            let session = URLSession(configuration: URLSessionConfiguration.default)
            let task = session.dataTask(with: storeRequest) { (data, response, error) in
                if let data = data,
                   let jsonResponse = try? JSONSerialization.jsonObject(with: data, options: []) as? [String: Any],
                   let receiptInfo = jsonResponse["receipt"] as? [String: Any],
                   let purchases = receiptInfo["in_app"] as? [[String: Any]],
                   let firstPurchase = purchases.first,
                   let originalTransactionID = firstPurchase["original_transaction_id"] as? String {
                    print("Original Transaction ID: \(originalTransactionID)")
                }
            }
            task.resume()
        } catch {
            print("Error: \(error.localizedDescription)")
        }
    }
}