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Learn Ethereum

You're reading from   Learn Ethereum A practical guide to help developers set up and run decentralized applications with Ethereum 2.0

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Product type Paperback
Published in Aug 2023
Publisher Packt
ISBN-13 9781804616512
Length 814 pages
Edition 2nd Edition
Languages
Concepts
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Authors (3):
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Dongying Song Dongying Song
Author Profile Icon Dongying Song
Dongying Song
Zhihong Zou Zhihong Zou
Author Profile Icon Zhihong Zou
Zhihong Zou
Xun (Brian) Wu Xun (Brian) Wu
Author Profile Icon Xun (Brian) Wu
Xun (Brian) Wu
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Toc

Table of Contents (24) Chapters Close

Preface 1. Part 1: Blockchain and Ethereum Basics
2. Chapter 1: Blockchain and Cryptocurrency FREE CHAPTER 3. Chapter 2: Ethereum Architecture and Ecosystem 4. Chapter 3: Decentralized Finance 5. Chapter 4: EVM-Compatible Blockchain Networks 6. Chapter 5: Deep Research and the Latest Developments in Ethereum 7. Part 2:Ethereum Development Fundamentals
8. Chapter 6: Fundamentals of Solidity 9. Chapter 7: Web3 API Fundamentals 10. Chapter 8: Developing Your Own Cryptocurrency 11. Part 3: Ethereum Development Fundamentals
12. Chapter 9: Smart Contract Development and Test Fundamentals 13. Chapter 10: Writing a Frontend to Build the NFT Marketplace DApp 14. Chapter 11: Ethereum Tools and Frameworks 15. Part 4:Production and Deployment
16. Chapter 12: Setting Up Ethereum Private Chain 17. Chapter 13: Deployment of Your DApps 18. Chapter 14: Building Ethereum Wallets 19. Chapter 15: Oracles, Technology, and Layer 2 in Practice 20. Part 5:Conclusion
21. Chapter 16: Conclusion 22. Index 23. Other Books You May Enjoy

Learning the fundamentals of web3.js – the Ethereum JavaScript API

web3.js is a collection of Ethereum JavaScript APIs that enable you to develop clients to interact with the Ethereum blockchain. This lets you read and write data to and from the Ethereum blockchain with smart contacts. Web3 provides interactions with Ethereum nodes (be they local or remote) via HTTP, IPC, or WebSocket. web3.js is used to interact with an Ethereum node (Geth node) using JSON-RPC to read and write data to the network. We can install the web3.js library with Node Package Manager (npm).

In the following subsection, we’ll discuss the web3.js basics and see how to start using web3.js to interact with the Ethereum blockchain. web3.js can be used both in frontends and backends. To simplify our work, we will run the web3.js API from the command line and will cover some popular web3.js APIs.

web3.js project setup

To begin working with web3.js, we need to set up a project that includes...

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