支付宝
https://opendocs.alipay.com/common/02kf5p?pathHash=81acb065
微信
https://pay.weixin.qq.com/wiki/doc/apiv3/wechatpay/wechatpay3_1.shtml
连连支付
https://open.lianlianpay.com/docs/development/signature-overview.html
google pay
https://developers.google.com/pay/api/android/guides/resources/payment-data-cryptography?hl=zh-cn