咨询关于Paypal支付的开发方法,该如何解决
咨询关于Paypal支付的开发方法
在网上找些资料，没太看明白。
用https://www.sandbox.paypal.com测试，如下形式发送请求，假如"abc_123456789_biz@163.com"是我的商家测试邮箱，"def_123456789_per@163.com"是我的个人测试邮箱，通过交易，可以从"def_123456789_per@163.com"减去1元，而"abc_123456789_biz@163.com"并没有增加1元。接下来要做什么呢？
我可以在https://www.sandbox.paypal.com的自动回复URL设置自己的网页地址，并接到一些值，如“Completed”等等，怎么用那些呢？
对于用户已经通过Paypal付款，第一时间得知并验证真伪等，正确的开发方法是什么呢？
也看到Paypal提供给开发者的SDK，怎么用呢？原理不太清楚。
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