介紹實作購買到購買確認的流程 1. 修正 2. session與state 3. 實作 點擊購買 到 購物資訊確認 4. 關於下架商品 ITHome: https://ithelp.ithome.com.tw/articles/10201284 Github: https://github.com/AustinTing/30day-e-commerce-linebot/tree/master/day-11 Youtube: https://www.youtube.com/watch?v=2pg0MzVvpe0