Book Image

Ethereum Cookbook

By : Manoj P R
Book Image

Ethereum Cookbook

By: Manoj P R

Overview of this book

Ethereum and Blockchain will change the way software is built for business transactions. Most industries have been looking to leverage these new technologies to gain efficiencies and create new business models and opportunities. The Ethereum Cookbook covers various solutions such as setting up Ethereum, writing smart contracts, and creating tokens, among others. You’ll learn about the security vulnerabilities, along with other protocols of Ethereum. Once you have understood the basics, you’ll move on to exploring various design decisions and tips to make your application scalable and secure. In addition to this, you’ll work with various Ethereum packages such as Truffle, Web3, and Ganache. By the end of this book, you’ll have comprehensively grasped the Ethereum principles and ecosystem.
Table of Contents (13 chapters)

Constructor and fallback functions

In this recipe, you will learn about two important methods in a contract: constructor and fallback functions.

How to do it...

The declaration and workings of these methods are very similar to other object-oriented languages. Let's look into each one individually.

Constructor

The constructor is a function that is executed when a contract is created. It cannot be called explicitly and is invoked only once during its lifetime. Every contract can have exactly one constructor and if no constructor is declared, the contract will use the...