PayPal Express Checkout 交易ID获取与退款操作指南

use Srmklive\PayPal\Services\ExpressCheckout;

// 假设 $provider 已经实例化，并且 $token 和 $payerId 已从 GetExpressCheckoutDetails 步骤获取
$provider = new ExpressCheckout;

// 准备支付详情，这通常与 SetExpressCheckout 时提供的详情一致
$data = [
    'items' => [
        [
            'name' => 'Monthly Unlimited',
            'price' => 24.99,
            'qty' => 1,
        ],
    ],
    'invoice_id' => '61', // 您的订单发票号
    'invoice_description' => 'Order #61 Invoice',
    'return_url' => 'https://example.com/paypal/success',
    'cancel_url' => 'https://example.com/paypal/cancel',
    'total' => 24.99,
    'currency' => 'USD',
];

// 调用 DoExpressCheckoutPayment 最终完成支付
$response = $provider->doExpressCheckoutPayment($data, $request->token, $request->PayerID);

// 检查响应是否成功
if (isset($response['ACK']) && $response['ACK'] === 'Success') {
    // 成功获取交易ID
    $transactionId = $response['PAYMENTINFO_0_TRANSACTIONID'];

    // 此时，您应该将 $transactionId 存储到您的数据库中，与您的订单关联
    // 例如：Order::where('invoice_id', $data['invoice_id'])->update(['paypal_transaction_id' => $transactionId]);

    echo "支付成功！交易ID: " . $transactionId;
    // 进一步处理订单，例如更新订单状态、发送确认邮件等
} else {
    // 支付失败，处理错误
    echo "支付失败：" . (isset($response['L_LONGMESSAGE0']) ? $response['L_LONGMESSAGE0'] : '未知错误');
}

use Srmklive\PayPal\Services\ExpressCheckout;

$provider = new ExpressCheckout;

// 从您的数据库中获取需要退款的交易ID
$transactionIdToRefund = 'YOUR_STORED_TRANSACTION_ID'; // 示例：从数据库中取出

// 调用 refundTransaction API
// 第二个参数是退款金额，如果省略或为 null，则默认全额退款
$response = $provider->refundTransaction($transactionIdToRefund);

// 检查退款响应
if (isset($response['ACK']) && $response['ACK'] === 'Success') {
    echo "退款成功！";
    // 更新您的订单状态为已退款
} else {
    echo "退款失败：" . (isset($response['L_LONGMESSAGE0']) ? $response['L_LONGMESSAGE0'] : '未知错误');
    // 处理退款失败逻辑
}

use Srmklive\PayPal\Services\ExpressCheckout;

$provider = new ExpressCheckout;

$searchParams = [
    'INVNUM' => '61', // 根据您的发票号进行搜索
    // 'STARTDATE' => '2021-10-01T00:00:00Z', // 可选：指定搜索开始日期
    // 'ENDDATE' => '2021-11-30T23:59:59Z',   // 可选：指定搜索结束日期
];

$response = $provider->transactionSearch($searchParams);

if (isset($response['ACK']) && $response['ACK'] === 'Success') {
    if (isset($response['L_TRANSACTIONID0'])) { // 假设只有一个匹配项
        $foundTransactionId = $response['L_TRANSACTIONID0'];
        echo "通过搜索找到交易ID: " . $foundTransactionId;
        // 现在可以使用这个ID进行退款
        // $provider->refundTransaction($foundTransactionId);
    } else {
        echo "未找到匹配的交易。";
    }
} else {
    echo "交易搜索失败：" . (isset($response['L_LONGMESSAGE0']) ? $response['L_LONGMESSAGE0'] : '未知错误');
}