小程序自定义交易组件开通之后，创建订单都没问题，但在调wx.requestOrderPayment ({})时，在开发者工具里边一直提示wx.requestOrderPayment is not a function是什么情况？我再app.json里边我也加了
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看下是不是基础库版本太低了，2.15.0+才支持这个接口
这个应该是基础库版本太低了，可以在向后端生成支付参数前用wx.canIuse(''requestOrderPayment)判断一下是否支持这个Api，如果用户的手机不支持这个Api的话，应该在生成支付参数时，告诉你们的后端，走换ticket流程，前端依然用wx.requestPayment发起支付