Book Image

Hyperledger Cookbook

By : Xun (Brian) Wu, Chuangfeng Zhang, Zhibin (Andrew) Zhang
Book Image

Hyperledger Cookbook

By: Xun (Brian) Wu, Chuangfeng Zhang, Zhibin (Andrew) Zhang

Overview of this book

Hyperledger is an open-source project and creates private blockchain applications for a range of domains. This book will be your desk reference as you explore common and not-so-common challenges faced while building blockchain networks using Hyperledger services. We'll work through all Hyperledger platform modules to understand their services and features and build end-to-end blockchain applications using various frameworks and tools supported by Hyperledger. This book's independent, recipe-based approach (packed with real-world examples) will familiarize you with the blockchain development cycle. From modeling a business network to integrating with various tools, you will cover it all. We'll cover common and not-so-common challenges faced in the blockchain life cycle. Later, we'll delve into how we can interact with the Hyperledger Fabric blockchain, covering all the principles you need to master, such as chaincode, smart contracts, and much more. We'll also address the scalability and security issues currently faced in blockchain development. By the end of this book, you will be able to implement each recipe to plan, design, and create a full-fledged, private, decentralized application to meet organizational needs.
Table of Contents (12 chapters)

Creating externally owned accounts and writing Solidity contracts on Seth

The easiest way to write Solidity contracts and check their grammar is to write them with Remix (https://github.com/ethereum/remix).

We will implement a similar smart contract as we did with Burrow to create an EOA account and perform transactions to deposit, withdraw, and query the account on the Sawtooth network via Seth.

How to do it...

  1. Create an externally owned account (EOA) with the Seth CLI. Start up shell in the seth-cli-go container:
sudo docker exec -it seth-cli-go bash
  1. In the container shell, generate a password-encrypted key file with OpenSSL:
openssl ecparam -genkey -name secp256k1 | openssl ec -out kevin.pem -aes128

  1. Generate another...