Этот платежный запрос должен быть авторизован отправителем — Paypal

Хорошо, вот что я сделал:

1. Создан PayRequest

2. SetPaymentOptions — https://developer.paypal.com/webapps/developer/docs/classic/api/adaptive-payments/SetPaymentOptions_API_Operation/

3. ExecutePayment — «Этот платежный запрос должен быть авторизован отправителем». У меня закончилась идея, почему я не могу выполнить платеж. Из того, что я понимаю, как только я выполню платеж, я получу PayKey, который я буду использовать для перенаправления пользователя на PayPal. https://developer.paypal.com/webapps/developer/docs/classic/api/adaptive-payments/ExecutePayment_API_Operation/

Прилагаются исходные коды, которые я использовал. Все значения жестко закодированы. Я старался изо всех сил, чтобы просмотреть подобные вопросы, и это не имеет смысла для меня, поскольку это противоречит тому, что я понимаю. В некоторых ответах указывалось, что покупателю необходимо подтвердить платеж, прежде чем выполнить платеж.

Я просто хочу видеть детали всех товаров, когда попадаю на страницу входа PayPal.

//1. Obtain endpoint. For live, no need sandbox?
$endPoint = "https://svcs.sandbox.paypal.com/AdaptivePayments/Pay";

//2. Format the HTTP headers needed to make the call.
$appID = "xxx"; //Sandbox test AppID:
$username = "xxx;
$password = "xxx";
$signature = "xxx";

$paypalHeaders = array(
"X-PAYPAL-SECURITY-USERID :" . $username,
"X-PAYPAL-SECURITY-PASSWORD :" . $password,
"X-PAYPAL-SECURITY-SIGNATURE :" . $signature,
"X-PAYPAL-APPLICATION-ID :" . $appID,
"X-PAYPAL-REQUEST-DATA-FORMAT : JSON",
"X-PAYPAL-RESPONSE-DATA-FORMAT : JSON");$data = array();
$data['actionType'] = "CREATE"; //PAY
$data['currencyCode'] = "SGD";
$receiver['amount'] = $orderTotal;
$receiver['email'] = $receiverEmail;
$data['receiverList'] = array();
$data['receiverList']['receiver'][] = $receiver;
$data['returnUrl'] = $returnURL;
$data['cancelUrl'] = $cancleURL;
$requestEnvelope = array();
$requestEnvelope['errorLanguage'] = "en_US";
$data['requestEnvelope'] = $requestEnvelope;

//I omitted the POST call
//print_r($returnedData);
$payKey = $returnedData->payKey;
$paymentStatus = $returnedData->paymentExecStatus;

/ *
* Установите способы оплаты
* /

$endPoint = "https://svcs.sandbox.paypal.com/AdaptivePayments/SetPaymentOptions";

//paymentDetailsData
$paymentDetailsData = array();

//set payKey
echo "payKey: " . $payKey;
$paymentDetailsData['payKey'] = $payKey;

//displayOptions
$displayOptions['businessName'] = "My Business";
$paymentDetailsData['displayOptions'] = $displayOptions;

//senderOptions
$senderOptions = array();
$senderOptions['requireShippingAddressSelection'] =  true; //set to true if courier is chosen
$senderOptions['shippingAddress']['addresseeName'] = "Ny Name";
$senderOptions['shippingAddress']['street1'] = "Address 1Avenue 3";
$senderOptions['shippingAddress']['street2'] = "#xx-112";
$senderOptions['shippingAddress']['city'] = "Singapore";
$senderOptions['shippingAddress']['state'] = "Singapore";
$senderOptions['shippingAddress']['zip'] = "123456";
$senderOptions['shippingAddress']['country'] = "Singapore";
$paymentDetailsData['senderOptions'] = $senderOptions;

//item
$item = array();
$item['name'] = "Korea";
$item['itemPrice'] = 11;
//there is still price, and itemcount

//invoiceData
$invoiceData = array();
$invoiceData['item'] = $item;

//receiverOptions
$receiverOptions = array();
$receiverOptions['description'] = "Product description.";
$receiverOptions['invoiceData'] = $invoiceData;

$paypalEmail = "[email protected]"; //I may need to change this
$receiver['email'] = $paypalEmail;
$receiverOptions['receiver'] = $receiver;
$paymentDetailsData['receiverOptions'] = $receiverOptions;

//requestEnvelope. I have set the request envelope above. It is the same. Can still be used.
$paymentDetailsData['requestEnvelope'] = $requestEnvelope;

makePaypalCall($endPoint, $paypalHeaders, $paymentDetailsData);

/*
* Get payment options. I can see the result of get payment options correctly,
*/
echo "GETTING PAYMENT OPTIONS";
$endPoint = "https://svcs.sandbox.paypal.com/AdaptivePayments/GetPaymentOptions";
$getPaymentData['payKey'] = $payKey;
$getPaymentData['requestEnvelope'] = $requestEnvelope;
makePaypalCall($endPoint, $paypalHeaders, $getPaymentData);

$endPoint = "https://svcs.sandbox.paypal.com/AdaptivePayments/ExecutePayment";/*
* ExecutePayment. Ok, I get the error here. This payment request must be authorized by the sender
*/
$executePaymentData = array();
echo "paykey: " . $payKey;
$executePaymentData['payKey'] = $payKey;
//$executePaymentData['actionType'] = "PAY";
$executePaymentData['requestEnvelope'] = $requestEnvelope;