To get the most out of this book

The hardware requirements are as follows:

• Ubuntu 16.04

The software requirements are as follows:

• Linux
• Node.js
• Truffle
• Ganache-CLI

Download the color images

We also provide a PDF file that has color images of the screenshots/diagrams used in this book. You can download it from https://www.packtpub.com/sites/default/files/downloads/HandsOnCybersecuritywithBlockchain_ColorImages.pdf.

Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "This folder include our smart contract, TwoFactorAuth.sol."

A block of code is set as follows:

forward-zones=bit.=127.0.0.1:5333,dns.=127.0.0.1:5333,eth.=127.0.0.1:5333,p2p.=127.0.0.1:5333
export-etc-hosts=off
allow-from=0.0.0.0/0
local-address=0.0.0.0
local-port=53

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

$ node registerAdmin.js  
//File Structure Tuna-app/tuna-chaincode.go


Any command-line input or output is written as follows:

sudo apt-get update
sudo apt-get install git npm
sudo apt-get install nodejs-legacy

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "We need to set the environment field to the Web3 Provider option."

Warnings or important notes appear like this.

Tips and tricks appear like this.