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Solidity Programming Essentials

You're reading from   Solidity Programming Essentials A beginner's guide to build smart contracts for Ethereum and blockchain

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Product type Paperback
Published in Apr 2018
Publisher Packt
ISBN-13 9781788831383
Length 222 pages
Edition 1st Edition
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Author (1):
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Ritesh Modi Ritesh Modi
Author Profile Icon Ritesh Modi
Ritesh Modi
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Table of Contents (12) Chapters Close

Preface 1. Introduction to Blockchain, Ethereum, and Smart Contracts FREE CHAPTER 2. Installing Ethereum and Solidity 3. Introducing Solidity 4. Global Variables and Functions 5. Expressions and Control Structures 6. Writing Smart Contracts 7. Functions, Modifiers, and Fallbacks 8. Exceptions, Events, and Logging 9. Truffle Basics and Unit Testing 10. Debugging Contracts 11. Other Books You May Enjoy

The web3 JavaScript library

The web3 library is an open source JavaScript library that can be used to connect to Ethereum nodes from the same or a remote computer. It allows IPC as well as RPC to connect to Ethereum nodes. web3 is a client-side library and can be used alongside a web page and query and can submit transactions to Ethereum nodes. It can be installed using the node package manager as a node module like the Solidity compiler. At the time of writing, the latest version of web3 is broken and does not install appropriately because of the missing BigNumber.js file. However, previous stable versions can be used for connecting web applications to backend Ethereum nodes. Let's take a look at the following steps to install the web3 JavaScript library:

  1. The command used to install web3 is as follows:
npm install [email protected]

The preceding command generates the following...

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