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Mastering Blockchain - Fourth Edition

You're reading from Mastering Blockchain - Fourth Edition

Product type Book

Published in Mar 2023

Publisher Packt

ISBN-13 9781803241067

Pages 818 pages

Edition 4th Edition

Languages

Concepts

Author (1):

Imran Bashir

Table of Contents (24) Chapters

Preface

1. Blockchain 101

2. Decentralization

3. Symmetric Cryptography

4. Asymmetric Cryptography

5. Consensus Algorithms

6. Bitcoin Architecture

7. Bitcoin in Practice

8. Smart Contracts

9. Ethereum Architecture

10. Ethereum in Practice

11. Tools, Languages, and Frameworks for Ethereum Developers

12. Web3 Development Using Ethereum

13. The Merge and Beyond

14. Hyperledger

15. Tokenization

16. Enterprise Blockchain

17. Scalability

18. Blockchain Privacy

19. Blockchain Security

20. Decentralized Identity

21. Decentralized Finance

22. Blockchain Applications and What’s Next

23. Index

Wallets

The wallet software is used to generate and store cryptographic keys. It performs various useful functions, such as receiving and sending Bitcoin, backing up keys, and keeping track of the balance available. Bitcoin client software usually offers both functionalities: Bitcoin client and wallet. On disk, the Bitcoin Core client wallets are stored as a Berkeley DB file:

$ file wallet.dat
     wallet.dat: Berkeley DB (Btree, version 9, native byte-order)

Private keys are generated by randomly choosing a 256-bit number provided by the wallet software. The rules of generation are predefined and were discussed in Chapter 4, Public Key Cryptography. Private keys are used by wallets to sign the outgoing transactions. Wallets do not store any coins. In fact, in the Bitcoin network, coins do not exist; instead, only transaction information is stored on the blockchain (more precisely, UTXO, unspent outputs), which are then used to calculate the number of bitcoins.

Fundamentally a cryptocurrency...

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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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