请求参数
array(6) {
  ["out_order_no"] => string(19) "cx16355504367066363"
  ["out_settle_no"] => string(19) "cx16378236221588893"
  ["settle_desc"] => string(6) "结算"
  ["notify_url"] => string(70) "https://tandian.chuangyipin.net.cn/index/notify/settlement_notify.html"
  ["sign"] => string(32) "6f9679372250c7ef30bc22f62bb25e83"
  ["app_id"] => string(20) "tt9083e63e0fbbee5c01"
}
返回参数

array(3) {
  ["err_no"] => int(3000)
  ["err_tips"] => string(36) "业务异常，请检查订单状态"
  ["settle_no"] => string(0) ""
}