使用laravel的Paypal退款金额

use PayPal\Api\Amount;
use PayPal\Api\Payout;
use PayPal\Api\PayoutSenderBatchHeader;
use PayPal\Api\RefundRequest;
use PayPal\Api\Sale;

// 初始化 PayPal 客户端
$client = new \PayPal\Client([
    'mode' => 'sandbox', // 或者 'live'
    'client_id' => env('PAYPAL_CLIENT_ID'),
    'client_secret' => env('PAYPAL_CLIENT_SECRET'),
]);

// 获取 Sale 对象
$sale = Sale::get('PAYMENT_ID', $client);

// 创建退款请求
$refundRequest = new RefundRequest();
$refundRequest->setAmount(new Amount());
$refundRequest->getAmount()->setTotal('10.00'); // 设置退款金额
$refundRequest->getAmount()->setCurrency('USD'); // 设置货币类型

try {
    // 执行退款操作
    $refund = $sale->refund($refundRequest, $client);
    echo "退款成功: " . $refund->getId();
} catch (\Exception $e) {
    echo "退款失败: " . $e->getMessage();
}