--- title: "香港開源區塊鏈活動 Hyperledger BootCamp 2019" url: https://sammy.hk/%e9%a6%99%e6%b8%af%e9%96%8b%e6%ba%90%e5%8d%80%e5%a1%8a%e9%8f%88%e6%b4%bb%e5%8b%95-hyperledger-bootcamp-2019/ author: Sammy Fung published: 2019-03-08T17:49:00+08:00 modified: 2021-06-01T17:53:43+08:00 description: "3月7-8日 Linux 基金會在香港數碼港舉行開源區塊鏈活動 Hyperledger BootCamp 2019，為 Hyperledger 旗下不同開源區塊鏈專案「開坑」，讓新開發者加速了解不同專案的入門方法，速成教導新開發者貢獻專案的程序。 BootCamp形式像BarCamp那像Unconfernce形式，由參…" categories: ["開放源碼"] tags: [blockchain, linux] source: https://sammy.hk --- [![](https://sammy.hk/wp-content/uploads/2021/06/hyperledger-bootcamp-2019-hk-02-800x445-1.jpg)](https://sammy.hk/wp-content/uploads/2021/06/hyperledger-bootcamp-2019-hk-02-800x445-1.jpg)3月7-8日 Linux 基金會在香港數碼港舉行開源區塊鏈活動 Hyperledger BootCamp 2019，為 Hyperledger 旗下不同開源區塊鏈專案「開坑」，讓新開發者加速了解不同專案的入門方法，速成教導新開發者貢獻專案的程序。 [![](https://sammy.hk/wp-content/uploads/2021/06/hyperledger-bootcamp-2019-hk-04-1024x768.jpg)](https://sammy.hk/wp-content/uploads/2021/06/hyperledger-bootcamp-2019-hk-04.jpg)BootCamp形式像BarCamp那像Unconfernce形式，由參加者設定每節題目。而不同之處是每節都需要參加者自備手提電腦，按不同專案和類型，分作12個10人大圓桌小組，跟主持（Session Leader）做一些習作和互動。主持按照該節目的，或多或少指導參加者作業，甚至交由參加者主導作業。另設三間10-20人培訓室，多作入門教學。 源自 IBM 釋出源碼的Hyperledger Fabric自然有不少人棒場，而筆者在兩日活動主要參加Hyperledger Iroha和Hyperledger Indy相關環節。 區塊鏈入門環節The Forest & the Trees! The unifying foundations of Blockchain，為區塊鏈新手講解區塊鏈技術。 以下是筆者英文速記： - DLT = Distributed Ledger Technology - Hash and Message Digest - Public Key Crypto - Merkle Tree - Transaction Chain - Blockchain - Header- contains - Chaining-achieved through hashing of previous blocks - Merkle Root: Hash based data structure of transactions (here Hash of Block data) - Permissioned vs Permissionless - Block-Fabric - Blockchain - Additional items in header and transactions….. - Block-Sawtooth - additional items in header an batches are to do with permission ledgers. [![](https://sammy.hk/wp-content/uploads/2021/06/hyperledger-bootcamp-2019-hk-03-1024x768-1.jpg)](https://sammy.hk/wp-content/uploads/2021/06/hyperledger-bootcamp-2019-hk-03-1024x768-1.jpg)Hyperledger Indy需要懂Rust的開發者，所以設有入門環節Introduction to Rust and Cargo，讓不認識Rust的開發者快速了解這Rust語言。以下是筆者英文速記： - WASM!! - Web app server -> middleware -> browser code, all in RUST! - cargo init –bin myproject - Cargo.toml - .toml json file in different layout. - cargo build - cargo run - Finished dev \[unoptimized + debuginfo\] target(s) in 4.53 secs - optimised version - cargo build —release - Finished release \[optimized\] target(s) in 0.0 secs - - - - - More packages than Python, Node - Most Recommended Package: serde - a generice serialisation/deserialization framework - IRON extensible web framework for rust - ironframework.io - enum = data type - pub fn fn\_name() {… } = public function - for i in a {… } = for loop - let, let out something = 0; - impl [![](https://sammy.hk/wp-content/uploads/2021/06/hyperledger-bootcamp-2019-hk-01-1024x768.jpg)](https://sammy.hk/wp-content/uploads/2021/06/hyperledger-bootcamp-2019-hk-01.jpg)筆者在Hyperledger Iroha入門環節Getting Started with Iroha Session I 的英文速記。 - Features - Command-driven architecture - Asset management - Identify management - Byzantine fault-tolerant ordering service and consensus - Role-based access control - Mutlo-signature transactions - Universal peer role and easy scripted deployment with Docker and Ansible - Why Iroha - Distributed Ledger platform for simple use-cases of payments and identify storage. - Uses fixed set of commands 16 in total (eg. asset creation, transfers, account creation) and ?? queues. - Successful Proof of Concept projects: cross-chain exchange, bank settlements, etc. - Data structure - User account {account\_name}@{domain} - Each user have some Asset {asset\_name}#{domain} - Works - Run Iroha locally - Create simple web service to interact with Iroha - Workshop 1 - Start Iroha node locally and perform several operations over it using CLI by following Getting Started document - [https://iroha.readthedocs.io/en/latest/getting\_started/](https://iroha.readthedocs.io/en/latest/getting_started/) - Get familiar with client java lib - obtain the wireframe example web server - implement needed functions by example from client java lib - check everything using Postman tool - - Iroha in Python: irohad –config ~/config.docker –keypair\_name ~/node0 \[2019-03-07 10:57:01.576692300\] \[I\] \[CLI/ResponseHandler/Query\]: \[Account Assets\] \[2019-03-07 10:57:01.576748700\] \[I\] \[CLI/ResponseHandler/Query\]: -Account Id:- test@test \[2019-03-07 10:57:01.576762100\] \[I\] \[CLI/ResponseHandler/Query\]: -Asset Id- coolcoin#test \[2019-03-07 10:57:01.576776500\] \[I\] \[CLI/ResponseHandler/Query\]: -Balance- 100.5 \[2019-03-07 10:57:40.420019600\] \[I\] \[CLI/ResponseHandler/Query\]: \[Account Assets\] \[2019-03-07 10:57:40.420044900\] \[I\] \[CLI/ResponseHandler/Query\]: -Account Id:- admin@test \[2019-03-07 10:57:40.420052900\] \[I\] \[CLI/ResponseHandler/Query\]: -Asset Id- coolcoin#test \[2019-03-07 10:57:40.420063700\] \[I\] \[CLI/ResponseHandler/Query\]: -Balance- 100.0 筆者在Hyperledger Indy入門環節Getting Started with Indy的英文速記。 - Sovrin Foundation, Sovrin Alliance - Identity - Sovrin donate source code to LF. - Most Bottom Layer: Indy-Crypto -> HyperLedger Ursa - Client side: Indy-SDK (libIndy & libVCX), Agent (on top SDK) (Python, Node), Sovrin Connector-App - Ledger side: Indy Plenum (Communicate with Nodes), Indy-Node (on top of Plenum)(Handling Identity), Sovrin Ledger plugin - Look for: Agent Protocol, Schema2.0, DKMS Efforts (Decentrailised Key Management System), Ledger 2.0 (Python?). 然後是Indy Agent的英文速記。 - - - 跟Quickstart： - 使用網卡IP地址而不用localhost - - - 在結束環節最後，Hyperledger 團隊宣佈 David Liu 被選為新的義務宣傳大使(ambassador)。 ### 相關文章： 1. 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