env('VNPAY_TMN_CODE', ''), 'hash_secret' => env('VNPAY_HASH_SECRET', ''), 'url' => env('VNPAY_URL', 'https://sandbox.vnpayment.vn/paymentv2/vpcpay.html'), 'return_url' => env('VNPAY_RETURN_URL', 'http://localhost/thanh-toan/vnpay-return'), 'api_url' => env('VNPAY_API_URL', 'http://sandbox.vnpayment.vn/merchant_webapi/merchant.html'), 'transaction_api' => env('VNPAY_TRANSACTION_API', 'https://sandbox.vnpayment.vn/merchant_webapi/api/transaction'), 'frontend_url' => env('FRONTEND_URL', 'http://localhost:3000'), ];