Полная оплата в Amazon Pay

На моем веб-сайте электронной коммерции я пытаюсь реализовать Amazon Pay. Здесь я успешно создал сеанс оформления заказа, но когда я выбираю оплату в Amazon, он возвращается на мой веб-сайт, но я хочу продолжить оплату в Amazon, а не возвращаться на свой веб-сайт. Я хочу, чтобы процесс был похож на кнопку экспресс-интеграции, которую Amazon предоставляет только для фиксированной оплаты. Я очень запутался и застрял в этом процессе. Пожалуйста, помогите мне решить эту проблему.

кнопка загрузки:

<div class = "col-md-12 col-sm-12 col-xs-12" style = "margin-top: 5%;">
                <?php $this->load->view('widgets/payment/amazon_pay_payment'); ?>
            </div>

amazon_pay.php

<div class = "row">
     
    <div class = "col-md-12">
       
        <div id = "amazonPayButtonContainer"></div>
       


        <!-- Amazon Pay script start -->
        <script src = "https://static-na.payments-amazon.com/checkout.js"></script>
<!--                <button id = "placeOrderButton" >Place Order</button>-->

        <script>
            console.info('Script loaded');
            document.addEventListener("DOMContentLoaded", function () {
                console.info('DOMContentLoaded event fired');
                console.info('DOMContentLoaded event fired');
    
    // Extract the amazonCheckoutSessionId from the URL
    const urlParams = new URLSearchParams(window.location.search);
    const amazonCheckoutSessionId = urlParams.get('amazonCheckoutSessionId');
    console.info('Amazon Checkout Session ID:', amazonCheckoutSessionId);
                const orderReferenceId = '<?php echo $custom; ?>';
                <?php
                $this->load->library('amazon_pay_lib');
//                $checkoutSession = $this->amazon_pay_lib->createCheckoutSession(
//                    array(
//                        'checkoutReviewReturnUrl' => g('base_url') . "checkout/notify",
//                        'oid' => $order_id,
//                        'code' => md5($order_id),
//                        'payment_status' => 'Completed',
//                        'custom' => $order_id
//                    ),
//                    array('storeId' => 'amzn1.application-oa2-client.XXXXXXXXXXXXXXXXXX')
//                );
//                $checkoutSession = $this->amazon_pay_lib->createCheckoutSession(
//                    array(
//                        'checkoutReviewReturnUrl' => g('base_url') . "checkout/notify", 
//                        'oid' => $order_id,
//                        'code' => md5($order_id),
//                        'payment_status' => 'Completed',
//                        'custom' => $order_id
//                    ),
//                    array('storeId' => 'amzn1.application-oa2-client.XXXXXXXXXXXXXXX')
//                );

$checkoutSession = $this->amazon_pay_lib->createCheckoutSession(
                    array('checkoutReviewReturnUrl' => 'https://example.com/checkout/step3?oid=472',
            'checkoutResultReturnUrl' => 'https://localhost/store/checkout_result'),
                    array('storeId' => 'amzn1.application-oa2-client.XXXXXXXXXXXXXXXXXXXX')
                );

                $payload = $checkoutSession['payload'];
                $signature = $checkoutSession['signature'];
                ?>

                console.info('Payload:', <?php echo json_encode($payload); ?>);
                console.info('Signature:', <?php echo json_encode($signature); ?>);
                
                
                

                const amazonPayButton = amazon.Pay.renderButton('#amazonPayButtonContainer', {
                    checkoutMode: 'Web/PuppetCheckout',
                    merchantId: 'XXXXXXXXXXXX',
                    publicKeyId: 'LIVE-XXXXXXXXXXXX',
                    ledgerCurrency: 'USD',
                    checkoutLanguage: 'en_US',
                    productType: 'PayOnly',
//                    sandbox: true,
                    placement: 'Cart',
                    buttonColor: 'Gold',
                    estimatedOrderAmount: {
                        "amount": '<?php echo json_encode($amount + $tax); ?>',
                        "currencyCode": "USD"
                    },
                    createCheckoutSessionConfig: {
                        storeId: 'amzn1.application-oa2-client.XXXXXXXXXXXX',
                        payloadJSON: '<?php echo $checkoutSession['payload']; ?>',
                        signature: '<?php echo $checkoutSession['signature']; ?>',
                        algorithm: 'AMZN-PAY-RSASSA-PSS-V2'
                    },
                    merchantMetadata: {
                        'merchantNote': 'Your merchant note',
                        'merchantReferenceId': '<?php echo $custom; ?>'
                    },
                    onError: function (error) {
                        console.info('onError callback:', error);
                        console.info('Error:', error.getErrorCode(), error.getErrorMessage());
                    },
                    authorization: function() {
            loginOptions = {scope: " payments:widget", popup: true};
            authRequest = amazon.Login.authorize (loginOptions, function(t) {
                    // console.info(t.access_token);
                    // console.info(t.expires_in);
                     console.info('checkout:', amazonCheckoutSessionId);
//                    showWalletWidget(null);
//                fetch('<?php echo base_url('amazon_pay_lib/getShippingAndPaymentInfo'); ?>', {
//                            method: 'POST',
//                            headers: {
//                                'Content-Type': 'application/json',
//                            },
//                            body: JSON.stringify({
//                                checkoutSessionId: checkoutSessionId,
//                            }),
//                        })
//                            .then(response => response.json())
//                            .then(data => {
//                                console.info('Shipping and Payment Info:', data);
//                            })
//                            .catch(error => {
//                                console.error('Error fetching shipping and payment info:', error);
//                            });
                        
                });
          }
                    
//                    onAuthorize: function (authorizeResult) {
//                        console.info('onAuthorize callback:', authorizeResult);
//                        console.info('Authorization successful:', authorizeResult);
//                        const checkoutSessionId = authorizeResult.details.checkoutSessionId;
////                         document.getElementById('placeOrderButton').disabled = false;
//
////                        fetch('<?php echo base_url('amazon_pay_lib/getShippingAndPaymentInfo'); ?>', {
////                            method: 'POST',
////                            headers: {
////                                'Content-Type': 'application/json',
////                            },
////                            body: JSON.stringify({
////                                checkoutSessionId: checkoutSessionId,
////                            }),
////                        })
////                            .then(response => response.json())
////                            .then(data => {
////                                console.info('Shipping and Payment Info:', data);
////                            })
////                            .catch(error => {
////                                console.error('Error fetching shipping and payment info:', error);
////                            });
//                        
//                      
//                    }
                    
                });
                
              
                
            });
            
        
            

        </script>
        
        <!-- Amazon Pay script end -->
    </div>
</div>

Amazon_pay_lib.php

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

require_once FCPATH . 'vendor/autoload.php'; 

use Amazon\Pay\API\Client;
 
  

class Amazon_pay_lib {
    private $client;
    private $privateKeyPath;  // Add this line
    
    public function __construct() {
        $this->privateKeyPath = FCPATH . 'AmazonPay_LIVE-XXXXXXXXXXXXXXX.pem';
        $this->initializeAmazonPayClient();

    }

    private function initializeAmazonPayClient() {
        $config = array(
            'public_key_id' => 'LIVE-XXXXXXXXXXXXXX', 
            'private_key' => file_get_contents($this->privateKeyPath),
            'region' => 'us',
//            'sandbox' => true,
            'algorithm' => 'AMZN-PAY-RSASSA-PSS-V2',
        );

        
        
        try {
            $this->client = new Client($config);
            
        } catch (\Exception $e) {
            die('Error initializing Amazon Pay client: ' . $e->getMessage());
        }   
    }
    
  
    
   
    
   
    
    public function getAccessToken() {
    try {
        $clientId = 'amzn1.application-oa2-client.XXXXXXXXXXXXXX';
        $clientSecret = 'amzn1.oa2-cs.v1.XXXXXXXXXXXXXXXXXXXX'; // Replace with your client secret
        $credentials = new \Amazon\Pay\API\Credentials($clientId, $clientSecret);

        $payloadData = [
            'grant_type' => 'client_credentials',
            'scope' => 'payments:transactions_read',
        ];

        $payload = new \Amazon\Pay\API\Request\AuthorizeFromCredentials($payloadData, $credentials);
        $response = $this->client->getAccessToken($payload);

        if ($response['status'] === 200) {
            $data = json_decode($response['response'], true);
            return $data['access_token'];
        } else {
            throw new \Exception('Error obtaining access token. Status: ' . $response['status']);
        }
    } catch (\Exception $e) {
        throw $e;
    }
}
    
    public function updateCheckoutAndCompletePayment($checkoutSessionId) {
        try {
            // Update the checkout session (if needed)
            // You can implement logic here to update the checkout session
            
            // Complete the payment
            $result = $this->client->completeCheckoutSession($checkoutSessionId);
            
            if ($result['status'] === 200) {
                // Payment completed successfully
                return true;
            } else {
                // Payment completion failed
                return false;
            }
        } catch (\Exception $e) {
            // Handle exceptions
            die('Error updating checkout session and completing payment: ' . $e->getMessage());
        }
    }
    
    public function completePayment() {
    try {
        // Get the checkout session ID from the request
        $checkoutSessionId = $_POST['checkoutSessionId'];

        // Call the method to update checkout session and complete payment
        $paymentCompleted = $this->updateCheckoutAndCompletePayment($checkoutSessionId);

        if ($paymentCompleted) {
            // Payment completed successfully
            echo json_encode(['success' => true]);
        } else {
            // Payment completion failed
            echo json_encode(['success' => false]);
        }
    } catch (\Exception $e) {
        // Handle exceptions
        echo json_encode(['error' => 'Error completing payment: ' . $e->getMessage()]);
    }
}


    
//    public function getShippingAndPaymentInfo($checkoutSessionId, $headers = array())
//{
//    try {
//        $result = $this->client->getCheckoutSession($checkoutSessionId, $headers);
//
//        // ... (rest of the method remains the same)
//        if ($result['status'] === 200) {
//                $response = json_decode($result['response'], true);
//                $checkoutSessionState = $response['statusDetails']['state'];
//                $chargeId = $response['chargeId'];
//                $chargePermissionId = $response['chargePermissionId'];
//
//                // Handle other response data as needed
//                $buyerName = $response['buyer']['name'];
//                $buyerAddress = $response['buyer']['shippingAddress'];
//
//                // Return the shipping and payment info
//                return array(
//                    'checkoutSessionState' => $checkoutSessionState,
//                    'chargeId' => $chargeId,
//                    'chargePermissionId' => $chargePermissionId,
//                    'buyerName' => $buyerName,
//                    'buyerAddress' => $buyerAddress,
//                    // Add other data as needed
//                );
//            } else {
//                // Handle the error
//                return array(
//                    'error' => 'Error fetching shipping and payment info. Status: ' . $result['status'],
//                );
//            }
//    } catch (\Exception $e) {
//        // Handle the exception
//        return array(
//            'error' => 'Exception: ' . $e->getMessage(),
//        );
//    }
//}


    
    public function getShippingAndPaymentInfo($checkoutSessionId) {
        try {
            $result = $this->client->getCheckoutSession($checkoutSessionId);

            if ($result['status'] === 200) {
                $response = json_decode($result['response'], true);
                $checkoutSessionState = $response['statusDetails']['state'];
                $chargeId = $response['chargeId'];
                $chargePermissionId = $response['chargePermissionId'];

                // Handle other response data as needed
                $buyerName = $response['buyer']['name'];
                $buyerAddress = $response['buyer']['shippingAddress'];

                // Return the shipping and payment info
                return array(
                    'checkoutSessionState' => $checkoutSessionState,
                    'chargeId' => $chargeId,
                    'chargePermissionId' => $chargePermissionId,
                    'buyerName' => $buyerName,
                    'buyerAddress' => $buyerAddress,
                    // Add other data as needed
                );
            } else {
                // Handle the error
                return array(
                    'error' => 'Error fetching shipping and payment info. Status: ' . $result['status'],
                );
            }
        } catch (\Exception $e) {
            // Handle the exception
            return array(
                'error' => 'Exception: ' . $e->getMessage(),
            );
        }
    }
    public function generateAmazonPaySignature($payload) {
        try {
            return $this->client->generateButtonSignature($payload);
            echo $signature . "\n";
        } catch (\Exception $e) {
            die('Error generating Amazon Pay signature: ' . $e->getMessage());
        }
    }

  public function createCheckoutSession($payload, $headers = array()) {
    try {
//           echo 'Request Payload: ' . json_encode($payload) . '<br>';

    // Echo the headers data for debugging
//    echo 'Request Headers: ' . json_encode($headers) . '<br>';
        // Log the payload data before making the request
//    file_put_contents(FCPATH . 'file.log', 'Request Payload: ' . json_encode($payload) . PHP_EOL, FILE_APPEND);

        // Log the headers data before making the request
//        file_put_contents(FCPATH . 'file.log', 'Request Headers: ' . json_encode($headers) . PHP_EOL, FILE_APPEND);

        
        $amazonpay_config = array(
            'public_key_id' => 'LIVE-XXXXXXXXXXXXX',
            'private_key'   => file_get_contents($this->privateKeyPath),
            'region'        => 'us',
//            'sandbox'       => true,
            'algorithm'     => 'AMZN-PAY-RSASSA-PSS-V2'
        );

        $client = new \Amazon\Pay\API\Client($amazonpay_config);
            $headers = array('x-amz-pay-idempotency-key' => uniqid());
        $checkoutSession = $client->createCheckoutSession($payload, $headers);
        $payload = json_encode([
                'storeId' => 'amzn1.application-oa2-client.XXXXXXXXXXXXXXXXXXX',
                'webCheckoutDetails' => [
                    'checkoutReviewReturnUrl' => $payload['checkoutReviewReturnUrl'],
                ],
            ]);
$signature = $client->generateButtonSignature($payload);

// Debug statements
file_put_contents(FCPATH . 'file.log', 'Payload: ' . $payload . PHP_EOL, FILE_APPEND);
file_put_contents(FCPATH . 'file.log', 'Signature: ' . $signature . PHP_EOL, FILE_APPEND);

return [
    'payload' => $payload,
    'signature' => $signature,
];
        // Check if the 'x-amz-pay-authtoken' key exists in the headers
//        if (isset($checkoutSession['headers']['x-amz-pay-authtoken'])) {
//            // Obtain the auth token from the response headers
//            $authToken = $checkoutSession['headers']['x-amz-pay-authtoken'];
//
//            // Include the auth token in the headers for subsequent requests
//            $headers['x-amz-pay-authtoken'] = $authToken;
//        } else {
//            // Handle the case where the key is not set (perhaps log a warning)
//            // $headers['x-amz-pay-authtoken'] will remain unset in this case
//        }
 $responsePayload = $checkoutSession['payload'];
        $responseSignature = $checkoutSession['signature'];

//        return [
//            'payload' => $responsePayload,
//            'signature' => $responseSignature,
//        ];
//        return $checkoutSession;
    } catch (\Exception $e) {
         echo 'Error creating checkout session: ' . $e->getMessage() . '<br>';
                
        file_put_contents(FCPATH . 'file.log', 'Error creating checkout session: ' . $e->getMessage() . PHP_EOL, FILE_APPEND);


        die('Error creating checkout session: ' . $e->getMessage());
    } catch (\ValueError $ve) {
        file_put_contents(FCPATH . 'file.log', 'Error: ' . $ve->getMessage() . PHP_EOL, FILE_APPEND);
 echo 'Error: ' . $ve->getMessage() . '<br>';
        die('Error: ' . $ve->getMessage());
    }
}
    
    public function updateCheckoutAndCompleteAmazonPayment($checkoutSessionId) {
        try {
            $result = $this->client->completeCheckoutSession($checkoutSessionId);
            if ($result['status'] === 200) {
                return true;
            } else {
                return false;
            }
        } catch (\Exception $e) {
            die('Error updating checkout session and completing payment: ' . $e->getMessage());
        }
    }
    
   public function updateCheckoutSession() {
    try {
        // Get the checkout session ID and updated payload from the request
        $checkoutSessionId = $_POST['checkoutSessionId'];
        $updatedPayload = json_decode($_POST['updatedPayload'], true);

        $amazonpay_config = array(
            'public_key_id' => 'LIVE-XXXXXXXXXXXXXXXXXX',
            'private_key' => file_get_contents($this->privateKeyPath),
            'region' => 'us',
            'algorithm' => 'AMZN-PAY-RSASSA-PSS-V2'
        );

        $client = new \Amazon\Pay\API\Client($amazonpay_config);

        // Update the checkout session with the new payload
        $result = $client->updateCheckoutSession($checkoutSessionId, $updatedPayload);

        if ($result['status'] === 200) {
            // Checkout session updated successfully
            $response = json_decode($result['response'], true);
            echo json_encode(['success' => true, 'response' => $response]);
        } else {
            // Checkout session update failed
            echo json_encode(['success' => false, 'error' => $result['response']]);
        }
    } catch (\Exception $e) {
        // Handle exceptions
        echo json_encode(['error' => 'Error updating checkout session: ' . $e->getMessage()]);
    }
}

    
   
    
 
    
    



}
?>

Я успешно сгенерировал сеанс оформления заказа, но не знаю, как продолжить оплату. Я не хочу возвращаться на свой веб-сайт и продолжать работу снова, вместо этого, как только будет выбран способ оплаты, он должен перейти на саму Amazon и произвести оплату.