private var productFetchCallbacks = [SKProductsRequest: ([SKProduct]) -> Void]()public func fetchProductsInfo(_ productIDs: [String],completion:@escaping ([SKProduct]) -> Void) {let set = Set<String>.init(productIDs)let request = SKProductsRequest.init(productIdentifiers: set)productFetchCallbacks[request] = completionrequest.delegate = selfrequest.start()}
//代理回调结果，注意代理回调结果是在多线程中，根据需求是否要切换成主线程
// MARK: SKProductsRequestDelegate
extension MXLiveIAPPayment : SKProductsRequestDelegate{public func productsRequest(_ request: SKProductsRequest, didReceive response: SKProductsResponse) {guard let callback = productFetchCallbacks[request] else { return }productFetchCallbacks[request] = nilDispatchQueue.main.async {callback(response.products)}}public func request(_ request: SKRequest, didFailWithError error: Error) {print(error.localizedDescription)if let productsFetchRequest = request as? SKProductsRequest {guard let callback = productFetchCallbacks[productsFetchRequest] else { return }productFetchCallbacks[productsFetchRequest] = nilDispatchQueue.main.async {callback([])}}}
//    public func requestDidFinish(_ request: SKRequest) {
//        print(request)
//    }
}

 let payment = SKMutablePayment()payment.quantity = 1payment.applicationUsername = currentOrder?.uuidpayment.productIdentifier = order.productIdpayment.simulatesAskToBuyInSandbox = true // test deferredSKPaymentQueue.default().add(payment)
//代理方法中收到支付结果
/ MARK: SKPaymentTransactionObserver
//处理未完成的交易
extension MXLiveIAPPayment : SKPaymentTransactionObserver{public func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {for tran in transactions {switch tran.transactionState {case .purchased://购买完成//成功的未移出的transaction进入app会会掉，失败的不会回掉self.delegate?.orderStatusChanged(order: currentOrder, status:.purchased)currentTransaction = trancompletePay(transaction: tran)print("-------IAP pay purchased--------------")breakcase.purchasing://商品添加进列表
//                 tran.transactionIdentifier此时未nilself.delegate?.orderStatusChanged(order: currentOrder, status: .purchasing)currentTransaction = tranself.updatePurchaseStatus(status: "purchasing")print("-------IAP pay purchasing--------------")breakcase.restored://已经购买过该商品self.delegate?.orderStatusChanged(order: currentOrder, status: .failed(MXLiveIAPError(reason: "product restored", code: -1)))self.updatePurchaseStatus(status: "restored")currentTransaction = tranfinishCurrentOrder()print("-------IAP pay restored--------------")breakcase.failed://购买失败self.delegate?.orderStatusChanged(order: currentOrder, status: .failed(tran.error ?? MXLiveIAPError(reason: "purchase failed error", code: -1)))handleFailure(tran)self.updatePurchaseStatus(status: "failed")//低版本iOS13以下添加观察者之后有可能直接走到此处失败的回调中currentTransaction = tranfinishCurrentOrder()print("-------IAP pay failed--------------")breakcase .deferred://https://stackoverflow.com/questions/42152560/how-to-handle-skpaymenttransactionstatedeferred//ask permission for your parent or guardian//ask for buy,We get transaction deferred state, if user is part of Apple family sharing & family admin enabled ASK TO BUY.currentTransaction = trancurrentOrder?.deferedDate = Date()currentOrder?.updateTokeyChain()self.updatePurchaseStatus(status: "deferred")self.delegate?.orderStatusChanged(order: currentOrder, status: .deferred)print("-------IAP pay deferred--------------")break@unknown default:()}}}private func handleFailure(_ transaction: SKPaymentTransaction) {guard let error = transaction.error else { return }let nsError = error as NSErrorguard nsError.domain == SKError.errorDomain else { return }switch nsError.code {case SKError.clientInvalid.rawValue, SKError.paymentNotAllowed.rawValue:print ("You are not allowed to make IAP payment.")case SKError.paymentCancelled.rawValue:print ( "IAP Payment has been cancelled.")case SKError.unknown.rawValue, SKError.paymentInvalid.rawValue:fallthroughdefault:print ("Something went wrong making IAP payment.")}}

private func verifyForApple(data:Data,transaction:SKPaymentTransaction?)  {self.delegate?.orderStatusChanged(order: currentOrder, status: .receiptChecking)let base64Str = data.base64EncodedString(options: .endLineWithLineFeed)let params = NSMutableDictionary()params["receipt-data"] = base64Strlet body = try? JSONSerialization.data(withJSONObject: params, options: .prettyPrinted)var request = URLRequest.init(url: URL.init(string: receiptState == 21008 ? url_receipt_itunes : url_receipt_sandbox)!, cachePolicy: .useProtocolCachePolicy, timeoutInterval: 20)request.httpMethod = "POST"request.httpBody = bodylet session = URLSession.sharedlet task = session.dataTask(with: request) { [weak self](data, response, error) inguard let data = data, let dict = try? JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? NSDictionary else{self?.delegate?.orderStatusChanged(order: self?.currentOrder, status: .failed(MXLiveIAPError(reason: "receipt check failed", code: -1)))return}print("receipt_info:")print(dict)let status = dict["status"] as? Intswitch(status){case 0:self?.delegate?.orderStatusChanged(order: self?.currentOrder, status: .complete)breakcase 21007:self?.receiptState = 21007self?.verifyForApple(data: data, transaction: transaction)breakdefault:self?.delegate?.orderStatusChanged(order: self?.currentOrder, status: .failed(MXLiveIAPError(reason: "receipt check failed", code: -1)))break}}task.resume()}

{receipt = {receipt_type = "ProductionSandbox";app_item_id = 0;receipt_creation_date = "2022-12-08 14:16:42 Etc/GMT";bundle_id = "com.mxplay.ios.live";original_purchase_date = "2013-08-01 07:00:00 Etc/GMT";in_app = ({quantity = "1";purchase_date_ms = "1670508859000";transaction_id = "2000000223045245";is_trial_period = "false";original_transaction_id = "2000000223045245";purchase_date = "2022-12-08 14:14:19 Etc/GMT";product_id = "mx_dq_00001";original_purchase_date_pst = "2022-12-08 06:14:19 America/Los_Angeles";in_app_ownership_type = "PURCHASED";original_purchase_date_ms = "1670508859000";purchase_date_pst = "2022-12-08 06:14:19 America/Los_Angeles";original_purchase_date = "2022-12-08 14:14:19 Etc/GMT";},{quantity = "1";purchase_date_ms = "1670508919000";transaction_id = "2000000223046251";is_trial_period = "false";original_transaction_id = "2000000223046251";purchase_date = "2022-12-08 14:15:19 Etc/GMT";product_id = "mx_dq_00002";original_purchase_date_pst = "2022-12-08 06:15:19 America/Los_Angeles";in_app_ownership_type = "PURCHASED";original_purchase_date_ms = "1670508919000";purchase_date_pst = "2022-12-08 06:15:19 America/Los_Angeles";original_purchase_date = "2022-12-08 14:15:19 Etc/GMT";});adam_id = 0;receipt_creation_date_pst = "2022-12-08 06:16:42 America/Los_Angeles";request_date = "2022-12-08 14:17:15 Etc/GMT";request_date_pst = "2022-12-08 06:17:15 America/Los_Angeles";version_external_identifier = 0;request_date_ms = "1670509035235";original_purchase_date_pst = "2013-08-01 00:00:00 America/Los_Angeles";application_version = "202202153";original_purchase_date_ms = "1375340400000";receipt_creation_date_ms = "1670509002000";original_application_version = "1.0";download_id = 0;};status = 0;environment = "Sandbox";}