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)

Watching events from your DApp

Events allow you to access the EVM logging facility, which can be used to keep state change information or to execute callbacks in the DApps. In this recipe, you will learn how to listen for new events raised in the contract and retrieve data stored in the transaction logs.

Getting ready

You need to have web3.js installed in your application to use these methods. Ensure that you have a geth- or Ganache-based Ethereum network to connect and test these methods.

How to do it...

We can watch events from DApp using the following steps:

  1. Consider...