---
# System prepended metadata

title: Untitled

---



* [blockchain coach](https://www.freecodecamp.org/news/author/web3coach/)



* 檔案上傳到 ipfs --->得到 "ipfs hash(CID)" + "file hash"+ "file name" + "file type"
* 解決問題:如何將前端介面得到的 ==ipfs hash== 與 ==file hash==透過 web3.js 存到 區塊鏈 private node 上
* "ipfs hash" + "file hash"--->存到私有鏈node上
