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Mastering Blockchain

You're reading from Mastering Blockchain A deep dive into distributed ledgers, consensus protocols, smart contracts, DApps, cryptocurrencies, Ethereum, and more

Product type Paperback

Published in Aug 2020

Publisher Packt

ISBN-13 9781839213199

Length 816 pages

Edition 3rd Edition

Languages

Solidity

Tools

Blockchain

Concepts

Blockchain

Author (1):

Imran Bashir

View More author details

Table of Contents (24) Chapters

Preface

1. Blockchain 101

2. Decentralization FREE CHAPTER

3. Symmetric Cryptography

4. Public Key Cryptography

5. Consensus Algorithms

6. Introducing Bitcoin

7. The Bitcoin Network and Payments

8. Bitcoin Clients and APIs

9. Alternative Coins

10. Smart Contracts

11. Ethereum 101

12. Further Ethereum

13. Ethereum Development Environment

14. Development Tools and Frameworks

15. Introducing Web3

16. Serenity

17. Hyperledger

18. Tokenization

19. Blockchain – Outside of Currencies

20. Enterprise Blockchain

21. Scalability and Other Challenges

22. Current Landscape and What's Next

23. Index

Interacting with contracts via frontends

It is desirable to interact with the contracts in a user-friendly manner via a webpage. It is possible to interact with the contracts using the web3.js library from HTML-/JS-/CSS-based webpages.

The HTML and JavaScript frontend

The HTML content can be served using any HTTP web server, whereas web3.js can connect via local RPC to the running Ethereum client (geth) and provide an interface to the contracts on the blockchain. This architecture can be visualized in the following diagram:

Figure 15.6: web3.js, frontend, and blockchain interaction architecture

If web3.js is not JavaScript frontend already installed, use these steps; otherwise, move on to the next section, Interacting with contracts via a web frontend.

Installing Web3.js JavaScript library

Web3, which we discussed earlier in this chapter, was looked at in the context of the Web3 API exposed by geth. In this section, we will introduce the Web3...

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Authors (1)

Imran Bashir

Imran Bashir

Imran Bashir has an M.Sc. in Information Security from Royal Holloway, University of London, and has a background in software development, solution architecture, infrastructure management, and IT service management. He is also a member of the Institute of Electrical and Electronics Engineers (IEEE) and the British Computer Society (BCS). Imran has extensive experience in both the public and financial sectors, having worked on large-scale IT projects in the public sector before moving to the financial services industry. Since then, he has worked in various technical roles for different financial companies in Europe's financial capital, London.

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