The application has changed from paid purchase to free use. We need to obtain the previous player's purchase records to unlock the paid content. //Here is the code for the client to obtain the player's payment information: NSURL * receiptURL = [[NSBundle mainBundle] appStoreReceiptURL]; if ([[NSFileManager defaultManager] fileExistsAtPath:[receiptURL path]]){ NSData *receiptData = [NSData dataWithContentsOfURL:receiptURL]; NSString *receiptUrlString = [receiptData base64EncodedStringWithOptions:NSDataBase64EncodingEndLineWithLineFeed]; NSLog(@"requestAppStoreReceipt receiptUrlString = %@", receiptUrlString); } else { // 如果凭证为空，则再发一次凭证请求 SKReceiptRefreshRequest *refreshReceiptRequest = [[SKReceiptRefreshRequest alloc] initWithReceiptProperties:@{}]; refreshReceiptRequest.delegate = self; [refreshReceiptRequest start]; NSLog(@"requestAppStoreReceipt 如果凭证为空，则再发一次凭证请求！"); } //The following is the server-side parsing code: Path filePath = Path.of("SubscriptionKey_ABCDEFGHIJ.p8"); String encodedKey = Files.readString(filePath); Environment environment = Environment.SANDBOX; AppStoreServerAPIClient client = new AppStoreServerAPIClient(encodedKey, keyId, issuerId, bundleId, environment); String appReceipt = "MIIcs..."; ReceiptUtility receiptUtil = new ReceiptUtility(); String transactionId = receiptUtil.extractTransactionIdFromTransactionReceipt(transactionReceipt); System.out.println(transactionId); if (transactionId != null) { long now = System.currentTimeMillis(); TransactionHistoryRequest request = new TransactionHistoryRequest() .sort(TransactionHistoryRequest.Order.DESCENDING) .revoked(false) .productTypes(List.of(TransactionHistoryRequest.ProductType.CONSUMABLE)); HistoryResponse response = null; List<String> transactions = new LinkedList<>(); do { String revision = response != null ? response.getRevision() : null; response = client.getTransactionHistory(transactionId, revision, request, GetTransactionHistoryVersion.V2); transactions.addAll(response.getSignedTransactions()); } while (response.getHasMore()); Set<InputStream> rootCAs = Set.of( new FileInputStream("AppleComputerRootCertificate.cer"), new FileInputStream("AppleIncRootCertificate.cer"), new FileInputStream("AppleRootCA-G2.cer"), new FileInputStream("AppleRootCA-G3.cer") ); Long appAppleId = 1234567899L; // appAppleId must be provided for the Production environment System.out.println(transactions.size()); SignedDataVerifier signedPayloadVerifier = new SignedDataVerifier(rootCAs, bundleId, appAppleId, environment, true); for (String notificationPayload : transactions) { try { AppTransaction payload = signedPayloadVerifier.verifyAndDecodeAppTransaction(notificationPayload); System.out.println(payload); } catch (VerificationException e) { e.printStackTrace(); } } } //Return result analysis: JWSTransactionDecodedPayload{originalTransactionId='2000000641683476', transactionId='2000000641683476', webOrderLineItemId='null', bundleId='', productId='', subscriptionGroupIdentifier='null', purchaseDate=1719566962000, originalPurchaseDate=1719566962000, expiresDate=null, quantity=1, type='Consumable', appAccountToken=null, inAppOwnershipType='PURCHASED', signedDate=1728885967093, revocationReason=null, revocationDate=null, isUpgraded=null, offerType=null, offerIdentifier='null', environment='Sandbox', storefront='CHN', storefrontId='143465', transactionReason='PURCHASE', price=6000, currency='CNY', offerDiscountType='null', unknownFields=null} We have develop according to the following document on our end： https://developer.apple.com/documentation/foundation/nsbundle/1407276-appstorereceipturl#4098404 https://developer.apple.com/documentation/appstoreserverapi/get_transaction_info/ https://developer.apple.com/documentation/appstoreserverapi/data_types We would like to know if the solutions in the document can be used to solve the problems we encountered? Is there a problem with our method of parsing bills that prevents us from obtaining the necessary information?