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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

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Product type Paperback
Published in Aug 2020
Publisher Packt
ISBN-13 9781839213199
Length 816 pages
Edition 3rd Edition
Languages
Concepts
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Author (1):
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Imran Bashir Imran Bashir
Author Profile Icon Imran Bashir
Imran Bashir
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Toc

Table of Contents (24) Chapters Close

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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