<pre>array(3) {
  ["err_no"] => int(2008)
  ["err_tips"] => string(45) "签名校验异常，请使用正确的签名"
  ["data"] => NULL
}
</pre>
这是报错

这个是 生成sign的：string(169) "{"app_id":"ttddebab5642d442a601","out_order_no":"202303301544164128","total_amount":2980000,"subject":"服务套餐咨询","body":"服务套餐咨询","valid_time":3000}"

这个是请求支付接口的：string(401) "{"app_id":"ttddebab5642d442a601","out_order_no":"202303301544164128","total_amount":2980000,"subject":"服务套餐咨询","body":"服务套餐咨询","merchant_id":"71669110598638492240","currency":"CNY","trade_time":"202303301544164128","valid_time":3000,"notify_url":"https://fw.fayuanbangxuan.cn/api/order/notify11","risk_info":"{\"ip\":\"222.90.56.151\"}","sign":"b227cd19b765a662f145edf2e693f1ba"}"

签名和我在签名工具上生成是同一个

b227cd19b765a662f145edf2e693f1ba