参考：

1. 通过PayPal进行支付网关集成 [ ^ ]

2. Judo Payment Setup [ ^ ]

Refer:
1. Payment Gateway Integration Through PayPal[^]
2. Judo Payment Setup[^]

您需要咨询您的支付网关公司，该公司可以为您提供详细信息。使用他们的客户服务。当我将联合钱包支付网关包含到我的电子商务网站时，我常常问了很多问题。我和我的开发人员同时工作。他们对我很好。我不确定上面给出的paypal链接是否适合你。它可能会帮助你理解一下。我希望这适合你。

You would need to consult your payment gateway company which could provide you detail information on this. Use their customer service. I used to ask so many questions when I included allied wallet's payment gateway to my e-commerce site. I worked with my developer and them simultaneously. They were nice to me. I am not sure if the link given above for paypal will work for you. It might help you to understand a bit. I hope that works for you.