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Mastering Blockchain. - Second Edition

You're reading from Mastering Blockchain. - Second Edition

Product type Book

Published in Mar 2018

Publisher Packt

ISBN-13 9781788839044

Pages 656 pages

Edition 2nd Edition

Languages

Concepts

Author (1):

Imran Bashir

Table of Contents (21) Chapters

Preface

1. Blockchain 101

2. Decentralization

3. Symmetric Cryptography

4. Public Key Cryptography

5. Introducing Bitcoin

6. Bitcoin Network and Payments

7. Bitcoin Clients and APIs

8. Alternative Coins

9. Smart Contracts

10. Ethereum 101

11. Further Ethereum

12. Ethereum Development Environment

13. Development Tools and Frameworks

14. Introducing Web3

Web3
Summary

15. Hyperledger

16. Alternative Blockchains

17. Blockchain – Outside of Currencies

18. Scalability and Other Challenges

19. Current Landscape and What's Next

20. Another Book You May Enjoy

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Web3

Web3 is a JavaScript library that can be used to communicate with an Ethereum node via RPC communication. Web3 works by exposing methods that have been enabled over RPC. This allows the development of user interfaces that make use of the Web3 library in order to interact with the contracts deployed over the blockchain.

In order to expose the methods via geth, the following command can be used:

$ geth --datadir .ethereum/privatenet/ --networkid 786 --rpc --rpcapi 'web3,net,eth,debug' --rpcport 8001 --rpccorsdomain 'http://localhost:7777'

The --rpcapi flag allows the web3, eth, net, and debug methods.

This is a powerful library and can be explored further by attaching a geth instance. Later in this section, you will be introduced to the concepts and techniques of making use of Web3 via JavaScript/HTML frontends.

The geth instance can be attached using the...

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Authors (1)

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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