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#Session 1 從 0 到 1 開發加密貨幣錢包 App (使用 React Native)

歡迎來到 JSDC 2021 共筆

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共筆入口：https://hackmd.io/@JSDC-tw/2021conference
手機版請點選上方 按鈕展開議程列表。

共筆協作，共享知識，打造開放社群。

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Welcome to JSDC 2021 Collaborative Writing

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Collaborative Writing Workplace：https://hackmd.io/@JSDC-tw/2021conference
Using mobile please tap to unfold the agenda.

Build a community with open collaboration.

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從這開始
可以直接打字做共筆囉

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開發的 App 16 萬用戶

Anderson Chen 陳柏安

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  • 管理加密貨幣
    • 資訊，交易紀錄
  • 其他區塊鏈應用
    • 網站
    • Dapp Browser
    • Protocal

160000 Downloads
10000000 Transactions

What is 加密貨幣錢包

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  • 生地址，需要一個 private key
    • 每次交易就要生很多！
  • Seed
    • 導出多個 Key 與 Address
    • Bitcoin I Proposol
    • 有了 Seed 可以到不同的錢包上使用

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  • 產生 12 or 24 length string
  • Demo code create a phrase

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  • 每次換數字，代表不同錢包

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  • 產生的地址可收 以太幣

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  • RPC API 沒有支援
  • 每個交易都有 Hash
  • 用 Hash 取得資料

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  • 鏈上沒有分類，這裡是 App 端作分類
  • 可在 App 上

如何分類

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  • Method ID of transfer()
    • 你要呼叫合約的那一個 method?
  • 知道交易內容，送到哪個 Address

發送交易

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  • TX: Transaction
  • contract instance 有地址與 API 就能用

Dapp Browser

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  • 網頁
  • 需要安裝錢包的瀏覽器插件
    • 呼叫 API 與 Metamask 互動

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  • 登入後可與錢包連結

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  • Provider 自製放入

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  • 呼叫節點
  • 背後為 RPC

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  • Engine 幫助你組成你要的 Provider

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  • WebView - 跨平台套件
  • 網頁讀完內 Run injected script
    • 但仍有抓不到 Provider 的可能
    • WebView 修改 Native Code

工商時間 XD

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  • 可換成美金喔
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