使用 PHP PayPal REST API 退款？

Question

我正在开发一个集成到 PayPal 的 REST API 中的 PHP 应用程序。 我正确处理了事务并将事务 ID 保存到 MySQL 数据库中。 我现在正在尝试退款销售，但无法让它停止给出“传入的 JSON 请求未映射到 API 请求”错误。 有人对如何使它工作有任何建议吗？

我在代码中留下了一些我的尝试，并对它们的结果进行了评论。 我在让这个工作的方向上有点迷失。 任何帮助将不胜感激。

我一直在关注位于此处的文档： https : //developer.paypal.com/docs/integration/direct/payments/refund-payment/

我可能正在努力将该请求适应 PHP。

我找到了这段代码： https : //github.com/paypal/PayPal-PHP-SDK/blob/master/sample/payments/RefundCapture.php

但是对于简单的退款请求来说，它“需要”一棵看起来有点过分的文件树。

<?php

require_once(dirname(__FILE__) . '/paypalSDK/autoload.php'); // require paypal files
require_once(dirname(__FILE__) . '/paypalSDK/paypal/rest-api-sdk-php/sample/common.php'); // require paypal files
// call required stuff
use PayPal\Api\Address;
use PayPal\Api\Amount;
use PayPal\Api\Details;
use PayPal\Api\ExecutePayment;
use PayPal\Api\FundingInstrument;
use PayPal\Api\Item;
use PayPal\Api\ItemList;
use PayPal\Api\Payer;
use PayPal\Api\Payment;
use PayPal\Api\PaymentCard;
use PayPal\Api\PaymentExecution;
use PayPal\Api\Transaction;
use PayPal\Api\Capture;
use PayPal\Api\Refund;
use PayPal\Api\RefundRequest;
use PayPal\Api\Sale;

$orderID = $_GET['order_id']; // order ID we wish to refund
// pull the details from the database so we have the transaction refund ID
$refQ = mysql_query("SELECT * FROM orders WHERE orders_ID = $orderID", $db);
$refC = mysql_num_rows($refQ);
if(!empty($refC)){

    $refR = mysql_fetch_assoc($refQ);
    $refNumber = $refR['orders_transaction_ref']; // paypal transaction ID
    $FinalTotal = $refR['orders_order_total']; // order total
    // paypal credentials
    $apiContext = new \PayPal\Rest\ApiContext(
        new \PayPal\Auth\OAuthTokenCredential(
            'abc',    
            'xyz'  
        )
    );
    $apiContext->setConfig(array('mode' => 'live',)); // live use, not sandbox

    //$amount = new Amount();  // commenting these out seemingly has no effect
    //$amount->setCurrency("USD")  // commenting these out seemingly has no effect
    //    ->setTotal($FinalTotal);  // commenting these out seemingly has no effect

    $refund = new Refund(); // if I comment these 2 lines out, I get "refund cannot be null"
    $refund->setAmount($FinalTotal); // if I comment these 2 lines out, I get "refund cannot be null"

    $sale = new Capture(); // if I comment these 2 lines out, I get "Call to a member function refund() on a non-object"
    $sale->setId($refNumber); // if I comment these 2 lines out, I get "Call to a member function refund() on a non-object"

    $refundRequest = new RefundRequest(); // commenting these out seemingly has no effect
    $refundRequest->setAmount($FinalTotal); // commenting these out seemingly has no effect

    //$captureRefund = $sale->refundCapturedPayment($refundRequest, $apiContext); // failure, error 400

    try {
        $sale->refund($refund, $apiContext);
        //$sale->refundCapturedPayment($refund, $apiContext); // failure, error 400
    } catch (Exception $ex) {
        echo '<pre style="font-size:16px;">';
            var_dump($ex);
        echo '</pre>';
        exit();
        die;
    }
}

更新 2017 年 3 月 8 日下午 12:23

我似乎已经取得了“一些”进展，尽管我使用这个词是松散的。 该状态返回“已完成”，但实际上并未发生退款。 它也没有像示例演示的那样返回父支付 ID。 对此有什么想法吗？ 我仍在努力让它发挥作用。

这是我目前从 PayPal 获得的结果：

object(PayPal\Api\Refund)#3 (1) {
  ["_propMap":"PayPal\Common\PayPalModel":private]=>
  array(5) {
    ["id"]=>
    string(17) "123456789123456789"
    ["create_time"]=>
    string(20) "2017-03-06T20:56:32Z"
    ["state"]=>
    string(9) "completed"
    ["amount"]=>
    object(PayPal\Api\Amount)#9 (1) {
      ["_propMap":"PayPal\Common\PayPalModel":private]=>
      array(3) {
        ["total"]=>
        string(4) "0.02"
        ["currency"]=>
        string(3) "USD"
        ["details"]=>
        object(PayPal\Api\Details)#13 (1) {
          ["_propMap":"PayPal\Common\PayPalModel":private]=>
          array(1) {
            ["subtotal"]=>
            string(4) "0.02"
          }
        }
      }
    }
    ["links"]=>
    array(1) {
      [0]=>
      object(PayPal\Api\Links)#17 (1) {
        ["_propMap":"PayPal\Common\PayPalModel":private]=>
        array(3) {
          ["href"]=>
          string(59) "https://api.paypal.com/v1/payments/refund/123456789123456789"
          ["rel"]=>
          string(4) "self"
          ["method"]=>
          string(3) "GET"
        }
      }
    }
  }
}

以下是目前返回上述响应的代码...

require_once(dirname(__FILE__) . '/paypalSDK/autoload.php'); // require paypal files
require_once(dirname(__FILE__) . '/paypalSDK/paypal/rest-api-sdk-php/sample/bootstrap.php'); // require paypal files
require_once(dirname(__FILE__) . '/paypalSDK/paypal/rest-api-sdk-php/sample/common.php'); // require paypal files
// call required stuff
use PayPal\Api\Address;
use PayPal\Api\Amount;
use PayPal\Api\Details;
use PayPal\Api\ExecutePayment;
use PayPal\Api\FundingInstrument;
use PayPal\Api\Item;
use PayPal\Api\ItemList;
use PayPal\Api\Payer;
use PayPal\Api\Payment;
use PayPal\Api\PaymentCard;
use PayPal\Api\PaymentExecution;
use PayPal\Api\Transaction;
use PayPal\Api\Capture;
use PayPal\Api\Refund;
use PayPal\Api\RefundRequest;
use PayPal\Api\Sale;

$orderID = $_GET['order_id']; // internal order ID we wish to refund

// pull the details from database so we have the PayPal transction ID
$refQ = mysql_query("SELECT * FROM orders WHERE orders_ID = $orderID", $db);
$refC = mysql_num_rows($refQ);
if(!empty($refC)){

    $refR = mysql_fetch_assoc($refQ);
    $refNumber = $refR['orders_transaction_ref']; // PayPal transaction ID 

    // attempted 'PAY-' ID, results in "Requested resource ID was not found."
    // $refNumber = $refR['orders_payment_ref']; // ex. PAY-123456789012345678901234 

    $FinalTotal = $refR['orders_order_total']; // order total

    // paypal credentials
    $apiContext = new \PayPal\Rest\ApiContext(
        new \PayPal\Auth\OAuthTokenCredential(
            'abc',    
            'xyz'  
        )
    );
    $apiContext->setConfig(array('mode' => 'live',)); // live use, not sandbox

    //$amount = new Amount();  // commenting these out seemingly has no effect
    //$amount->setCurrency("USD")  // commenting these out seemingly has no effect
    //    ->setTotal($FinalTotal);  // commenting these out seemingly has no effect

    /*
    // attempted code 
    // ### Refund object
    $refund = new Refund();
    //$refund = new RefundRequest();
    $refund->setAmount($FinalTotal);
    */

    $refund = new Refund();
    $refund->setId($refNumber);
    $refund->setSaleId($refNumber);
    $refund->setAmount($FinalTotal);
    $refund->setReason("Testing refund code");
    //$refund->get($refNumber, $apiContext);

    // Attempted code, didn't work
    // https://stackoverflow.com/questions/18927591/paypal-api-how-to-get-sale-id-and-refund-payment-made-via-paypal
    // Fatal error: Uncaught exception 'InvalidArgumentException' with message 'paymentId cannot be null' in /home/cartridgeworkspl/public_html/cfx_controllers/paypalSDK/paypal/rest-api-sdk-php/lib/PayPal/Validation/ArgumentValidator.php:25 Stack trace: #0 
    // $payments = Payment::get($refNumber, $apiContext);
    // $payments->getTransactions();
    // $obj = $payments->toJSON();//I wanted to look into the object
    // $paypal_obj = json_decode($obj);//I wanted to look into the object
    // $transaction_id = $paypal_obj->transactions[0]->related_resources[0]->sale->id;
    // $this->refund($transaction_id);//Call your custom refund method

    try {
        //var_dump($refund);
        $refundResponse = Refund::get($refNumber, $apiContext);
        echo '<pre>';
            var_dump($refundResponse);
        echo '</pre>';
        echo $refundResponse->getState();
        echo $refundResponse->getReasonCode();
    } catch (Exception $ex) {
        // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
        ResultPrinter::printError("Get Payment", "Payment", null, null, $ex);
        exit(1);
    }

}

任何帮助将不胜感激。

Answer 1

文档： https : //developer.paypal.com/docs/api/quickstart/refund-payment/#set-the-refund-object

付款和退款使用： paypal/rest-api-sdk-php

首先，当您付款时，它必须是“销售”。

[...]
$payment = new Payment();
$payment->setIntent('sale')
    ->setPayer($payer)
    ->setRedirectUrls($redirect_urls)
    ->setTransactions(array($transaction));
[...]

PayPal 将返回带有“ paymentId ”值的付款，您需要保存它。

退款示例。

//Previosly saved payments ID.
$paymentId = 'PI_Fv54vfd45';

//Create API connection
$apiContext = new ApiContext(new OAuthTokenCredential($paypalConf['client_id'], $paypalConf['secret']));
$apiContext->setConfig($paypalConf['settings']);

//Get sale from payment
$paypalPayment = new Payment();
$paymentInfo = $paypalPayment->get($paymentId, $apiContext);

$transactions = $paymentInfo->getTransactions();
if(empty($transactions[0])){
    return false;
}

$relatedResources = $transactions[0]->getRelatedResources();
if(empty($relatedResources[0])){
    return false;
}
$sale = $relatedResources[0]->getSale();

$refund = new Refund();
$amt = (new Amount())->setTotal(100)->setCurrency('EUR');
$refund->setAmount($amt);
$refund->setReason('Sale refund');

$refundedSale = $sale->refund($refund, $apiContext);
return ($refundedSale->getState() === 'completed');

Answer 2

我认为问题在于，当您提交退款时，您还必须设置 API 上下文。 第一个上下文建立与 API 的连接，然后设置销售 ID。 我相信您必须为该销售 ID 设置 API 上下文，但我不是 100%。

Answer 3

我设法通过了它。 以下是成功退还通过 REST API 发出的 PayPal 订单的代码。

<?php
    require_once(dirname(__FILE__) . '/paypalSDK/autoload.php'); // require paypal files
    require_once(dirname(__FILE__) . '/paypalSDK/paypal/rest-api-sdk-php/sample/bootstrap.php'); // require paypal files
    require_once(dirname(__FILE__) . '/paypalSDK/paypal/rest-api-sdk-php/sample/common.php'); // require paypal files

    // call required PayPal functionality
    use PayPal\Api\Address;
    use PayPal\Api\Amount;
    use PayPal\Api\Details;
    use PayPal\Api\ExecutePayment;
    use PayPal\Api\FundingInstrument;
    use PayPal\Api\Item;
    use PayPal\Api\ItemList;
    use PayPal\Api\Payer;
    use PayPal\Api\Payment;
    use PayPal\Api\PaymentCard;
    use PayPal\Api\PaymentExecution;
    use PayPal\Api\Transaction;
    use PayPal\Api\Capture;
    use PayPal\Api\Refund;
    use PayPal\Api\RefundRequest;
    use PayPal\Api\Sale;

    $orderID = $_GET['order_id']; // internal order ID we wish to refund

    // pull the details from database so we have the PayPal transction ID
    $refQ = mysql_query("SELECT * FROM orders WHERE orders_ID = $orderID", $db);
    $refC = mysql_num_rows($refQ);
    if(!empty($refC)){

        $refR = mysql_fetch_assoc($refQ); // array of order data

        $refNumber = $refR['orders_transaction_ref']; // PayPal transaction ID 
        $FinalTotal = $refR['orders_order_total']; // order total

        // get PayPal access token via cURL
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, "https://api.paypal.com/v1/oauth2/token");
        curl_setopt($ch, CURLOPT_HTTPHEADER, array(
            'Accept: application/json',
            'Accept-Language: en_US'
        ));
        curl_setopt($ch, CURLOPT_USERPWD, 'USER:PASS');
        curl_setopt($ch, CURLOPT_POSTFIELDS, 'grant_type=client_credentials');
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 
        $output = curl_exec($ch);
        $json = json_decode($output);
        $token = $json->access_token; // this is our PayPal access token

        // refund PayPal sale via cURL
        $header = Array(
            "Content-Type: application/json",
            "Authorization: Bearer $token",
        );
        $ch = curl_init("https://api.paypal.com/v1/payments/sale/$refNumber/refund");
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, '{}');
        curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
        $res = json_decode(curl_exec($ch));
        $code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        curl_close($ch);

        // if res has a state, retrieve it
        if(isset($res->state)){
            $state = $res->state;
        }else{
            $state = NULL; // otherwise, set to NULL
        }

        // if we have a state in the response...
        if($state == 'completed'){
            // the refund was successful
        }else{
            // the refund failed
            $errorName = $res->name; // ex. 'Transaction Refused.'
            $errorReason = $res->message; // ex. 'The requested transaction has already been fully refunded.'
        }
    }
?>

Answer 4

遵循接受的答案，对于那些想知道如何进行部分退款的人，而不是：

curl_setopt($ch, CURLOPT_POSTFIELDS, '{}');

您应添加以下参数：

curl_setopt($ch, CURLOPT_POSTFIELDS, '{
  "amount": {
    "value": "12.34",
    "currency_code": "EUR"
  }
}');