1.接口：/v3/pay/transactions/jsapi

"POST", Url, 时间戳, 随机数, 请求body数据，验签数据与本地工具生成的签名相同，

2.签名前数据：

POST\n/v3/pay/transactions/jsapi\n20240907170747563\n1155326657\n{"appid":"wx5352c9644788f117","mchid":"1527063541","description":"测试收款用的","out_trade_no":"MH20240907170747563_1","notify_url":"http://wy.gdhxgroup.com/payed.wx","amount":{"total":1,"currency":"CNY"},"payer":{"openid":"ojY3kv9jOOYP6GgtD9FPaU-h1QHg"}}\n

3.签名结果与本地工具签名相同

Authorization=WECHATPAY2-SHA256-RSA2048  mchid="1527063541",serial_no="6975CC870166CE7A274D0E2E44357AA5507B01E2",nonce_str="847600463",timestamp="20240907170428952",signature="GNGogYaMiRiwCMiipANvlOom6OW+k1hFkCtki6j5t48MmJ0q7+CHB1omcgt1e79J/EpNIcb7vcc4X0y/YKPZP6u8ePdIJ/c/l21+HrI26jw5arfK4L/2qECZ+4f44AdFachnMU3O5O5l7YS74/RThUXiEHbX1Un06WMvNKS5Qi0M25fPNm6BXMpwFszeIa6UqP9NS8qtA+NwLRxhaNrPj+RlamURg3Jjy06qCX602qtr57McCPKAPqv0jdyHGznc5kQwjsOlcpEyYEdbLfE/WspUxfJSgy83GE5ZqY+h30gzut7ymMVXls8EGoMPYqXNWMEQWN9/rw67bFVZN+YQmA=="

4.接口返回报错：

{

    "code": "SIGN_ERROR",

    "detail": {

        "detail": {

            "issue": "sign not match"

        },

        "field": "signature",

        "location": "authorization",

        "sign_information": {

            "method": "POST",

            "sign_message_length": 343,

            "truncated_sign_message": "POST\n/v3/pay/transactions/jsapi\n20240907170428952\n847600463\n{\"appid\"\n",

            "url": "/v3/pay/transactions/jsapi"

        }

    },

    "message": "签名错误，请检查后再试"

}