Blockchain Quick Start Guide电子书

Title Page

Copyright and Credits

Blockchain Quick Start Guide

About Packt

Why subscribe?

Packt.com

Contributors

About the authors

About the reviewers

Packt is searching for authors like you

Preface

Who this book is for

What this book covers

To get the most out of this book

Download the example code files

Conventions used

Get in touch

Reviews

Introduction to Blockchain Technology

The genealogy analogy

Bitcoin

Why Bitcoin

A peer-to-peer network

Cryptography and hash functions

The distributed ledger, blocks, transactions, addresses, and UTXO

The consensus mechanism

Forking

Mining and difficulty level

Hacking – the 51% problem

Private keys and Bitcoin wallets

Bitcoin scripting

Altcoins

Ethereum

Enterprise blockchain – Hyperledger

The evolution of blockchain

Summary

Ethereum Fundamentals

An overview of Ethereum

Ethereum basic concepts

Ether

ERC20 tokens

Smart contracts

Ethereum virtual machines

Ethereum gas

Account

Oracle

Other concepts

Performance

Throughput

Proof-of-Stake (PoS)

Casper

Plasma

Sharding

Summary

Overview of Solidity Programming

What is solidity?

Tools for solidity development environment

Browser-based IDE

Remix

EthFiddle

Command-line development management tools

Truffle

Introduction to smart contracts

Layout of a solidity source file

Pragma

Comments

Import

Paths

Relative paths

Structure of a contract

State variables

Data type

Enum type

Struct type

Mapping

Functions

Input parameters

Access modifiers

Output parameters

Modifiers

Events

Constructor

Constant state variables, unit, and functions

Ether units

Time units

Inheritance, abstract, and interface

Common smart contract patterns

Access restriction

State machine

Smart contract security

Keep contract simple and modular

Use the checks-effects-interactions pattern

DoS with block gas limit

Handle errors in external calls

Case study – crowdfunding campaign

Summary

Building an Ethereum Blockchain Application

Decentralized application overview

web3.js quick overview

Provider

DApp development tools

Truffle

Ganache

Setting up an Ethereum development environment

Installing Truffle

Installing Ganache

Creating a Truffle project

Launching the Ganache environment

Deploying a smart contract

Writing a campaign decentralized application

Selecting a web3 provider

Loading account information

Loading project information

Handling the fund function

checkGoalReached

Summary

Exploring an Enterprise Blockchain Application Using Hyperledger Fabric

Key concepts in Hyperledger Fabric

Ledger

Chaincode

Channel

Core component model

Peers

Membership service provider (MSP)

Certificate authority (CA)

Ordering service

Hyperledger Fabric basic transaction flow

Issuance claim

Setting up a Hyperledger Fabric environment

Installation prerequisites

Installing Hyperledger Fabric

Writing chaincode

Development tools

LiteIDE

JetBrains Gogland

Visual Studio Code

Chaincode key concept and APIs

Defining an issuance claim

Initializing the chaincode

Invoking the chaincode

AddCompany

ReportLost

RequestedInfo

SubmitClaim, ConfirmClaimSubmission, ApproveClaim

Query

getHistory

Configuring Hyperledger Fabric

Generating the certificate

Generating an orderer genesis block

Generating a channel configuration transaction

Overview of Hyperledger Fabric Docker composer configuration files

Fabric project directory structure

Docker-compose-base.yaml

Peer-base.yaml

Starting the Hyperledger Fabric network

Creating a channel

Joining channels

Updating the anchor

Installing chaincode

Instantiating the chaincode

Invoking add broker

Invoking add insurer

Invoking ReportLost

Invoking RequestedInfo

Invoking SubmitClaim

Invoking ConfirmClaimSubmission

Invoking ApproveClaim

Querying claim history

End-to-end test execution

Summary

Implementing Business Networks Using Hyperledger Composer

Hyperledger Composer – a quick overview

Yeoman generator

Composer REST server

LoopBack connector

JavaScript SDK

Composer playground

Composer-cli

Setting up a Hyperledger Composer environment

Installation prerequisites

Installing the development environment

Analyzing business scenarios

Business network archive

Network model file (.cto)

Script file (.js)

Access control list (ACL) file (.acl)

Query file (.qry)

Designing business models

Implementing the business transaction function

Testing in the playground

Deploying a business network

Integrating with REST server

Generating the Hyperledger Composer REST API

Summary

Blockchain Use Cases

Blockchain use case examples

Payment and settlement services

Import and export finance

Immutable ledger

Regulatory compliance and auditing

Identity theft detection

Funds back-office operation

Collateral management

Healthcare systems

Real estate trading and rental markets

IP market

Elections

HR and recruiting

Public records

Reduce contract disputes

Sharing economy

Integration with IoT

Facilitate commercial and social relationships

How to choose a proper use case

DApp use case – healthcare data sharing

The business problem

A blockchain solution

Summary

Other Books You May Enjoy

Leave a review - let other readers know what you think