https://api.mch.weixin.qq.com/v3/pay/transactions/jsapi

小程序调用支付接口传入了参数payer: {"openid": "xxxxx"},报错

{"code":"PARAM_ERROR","detail":{"location":null,"value":["/body/payer/openid"]},"message":"请求中含有未在API文档中定义的参数"}