有没有可以直接接入到自己小程序的交易组件？

小程序可以接入标准组件。https://developers.weixin.qq.com/miniprogram/dev/platform-capabilities/business-capabilities/ministore/minishopopencomponent/Introduction.html

请参考：https://developers.weixin.qq.com/miniprogram/dev/platform-capabilities/business-capabilities/ministore/minishopopencomponent2/Introduction.html