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title: Vac, Waku v2 and Ethereum Messaging COSCUP [SLIDES]

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## वाच्、ワク2和以太坊的訊息傳遞
## Vac, Waku v2 and Ethereum Messaging


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### 介紹
### Introduction

- Waku v2
- Ethereum/Swarm/Whisper
- 三位一體（Holy Trinity), Web3

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### 小小的故事和背景
### Brief history and background

- Vac協議研究的研發團體 (protocol research R&D group)
- p2p、模組化 (modularity)、隱私 (privacy)、
安全 (security)、無審查通訊 (censorship-resistance)
- Whisper復刻 (fork) -> Waku v1 [[talk](https://www.youtube.com/watch?v=6lLT33tsJjs)]

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## Waku v2


*bak-kuh bak-kuh!*

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### 概述
### Overview

- 一套協議 Set of protocols
- 一組實現 Set of implementations
- 網路節點 Network of nodes

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### 目標
### Goals

- 普遍的訊息傳遞 Generalized messaging
- 點對點 Peer-to-peer
- 資源受限 Resource restricted
- 隱私 Privacy
- 模組化 Modularity

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### 協議
### Protocols

- 10/WAKU2
- 11/RELAY - GossipSub
- 13/STORE
- 14/MESSAGE
- [rfc.vac.dev](rfc.vac.dev)

###### (還有Also：基於內容的過濾 content-based filtering、橋街模式到bridge to Waku 1、JSON RPC API、RLN zkSNARKS垃圾郵件保護 spam protection、於SWAP的記帳結算 accounting and settlement、容錯儲存節點 fault tolerant store protocol、主題使用的建議等等 topic usage recommendations, etc.)

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### 實現
### Implementations

- nim-waku
- js-waku
- go-waku

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### 測試網迴籠和率先使用產品
### Testnet Huilong and dogfooding

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### Toy chat

- [nim-waku chat](https://github.com/status-im/nim-waku/blob/master/docs/tutorial/chat2.md)

- [js-waku chat](https://status-im.github.io/js-waku/)

- [go-waku chat](https://github.com/status-im/go-waku/tree/master/examples/chat2)

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### 研究
### Research

- zkSNARKS RLN 保護避免垃圾郵件，保護隱私 (privacy-preserving spam prevention)
- SWAP記帳和結算 (accounting and settlement)
- STORE協議的狀態同步 (state synchronization)
- 更好節點發現 (node discovery)
- 更嚴格的隱私分析 (rigorous privacy analysis)
- 改進錢包跟DApps的互動
(better interaction with wallets and DApps)

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## 應用
## Use cases

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### 序幕：Waku 2中的主題
### Prelude: Topics in Waku v2

- PubSub主題用於路由 (PubSub topics routing)
- `/waku/2/default-waku/proto`
- 內容主題 (Content topics)
- `/toychat/2/huilong/proto`
- [23/TOPIC-RECOMMENDATIONS](https://rfc.vac.dev/spec/23)

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### Status APP
- Waku 2內容主題、Waku 1中的主題差不多
Waku v2 content topic ~ Waku v1 topic
- 聯絡代碼主題, X3DH捆綁包, 被分割
Contact code topic, X3DH bundle, partitioned
- 公開對談 (public chat topic)
- DHKE延伸一對一的協商主題
Negotiated topic for 1:1 chat
- [specs.status.im/spec/10](https://specs.status.im/spec/10)

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### DappConnect: 以太坊訊息傳遞 Ethereum messaging

- 多重簽名和DAO投票，一筆鏈上操作交易
Multisig and DAO voting, one on-chain tx
- DApps 向用戶推播
Give ability for DApps to notify users
- 讓用戶直接回應DApps的要求
Allow users to respond directly to requests
- 去中心化 WalletConnect
Decentralized WalletConnect
- 等等 etc

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### WalletConnect v2


[WalletConnect v2 spec](https://docs.walletconnect.org/v/2.0/tech-spec)

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### 更多例如
### More examples

- 無瓦斯投票 鏈下集合
Gas-less voting, aggregation off-chain
- 玩家發現機制DApp遊戲
Player Discovery for DApp games
- 使用以太坊金鑰向某人傳送加密訊息
Send encrypted messages with Ethereum key
- *你自己的DApp在這裡*
*Your own DApp here*

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## 貢獻
## Contribute

- 玩玩看 ([Play](https://github.com/status-im/nim-waku/blob/master/docs/tutorial/chat2.md) [around](https://status-im.github.io/js-waku/))
- 用Waku建構你的DApp (Use Waku for a DApp)
- 貢獻代碼庫 (Contribute code)
- [js-waku](https://github.com/status-im/js-waku) / [nim-waku](https://github.com/status-im/nim-waku)
- 貢獻到協議規範 (Contribute to [specs](https://github.com/vacp2p/rfc))
- 我們也在找人 (We are [hiring](https://status.im/our_team/jobs.html))
- 參加新的Discord (Join our new [Discord](https://discord.gg/WHm2XVyv)) **新的Discord 在這裡： https://discord.gg/bJCTqS5H**
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## 結論
## Conclusion

- Web3, Waku
- 協議、實現、測試網、研究
Protocols, implementations, testnet, research
- Waku 應用
Waku use cases

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## 謝謝
## Thanks

- [@oskarth](twitter.com/oskarth)
- [@vacp2p](twitter.com/vacp2p) / [vac.dev](vac.dev)
- 提問時間（QA)