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Blockchain Quick Reference

You're reading from   Blockchain Quick Reference A guide to exploring decentralized blockchain application development

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Product type Paperback
Published in Aug 2018
Publisher Packt
ISBN-13 9781788995788
Length 350 pages
Edition 1st Edition
Languages
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Authors (4):
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Brenn Hill Brenn Hill
Author Profile Icon Brenn Hill
Brenn Hill
Paul Valencourt Paul Valencourt
Author Profile Icon Paul Valencourt
Paul Valencourt
Samanyu Chopra Samanyu Chopra
Author Profile Icon Samanyu Chopra
Samanyu Chopra
Mariko Amekodommo Mariko Amekodommo
Author Profile Icon Mariko Amekodommo
Mariko Amekodommo
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Toc

Table of Contents (24) Chapters Close

Preface 1. Blockchain 101 2. Components and Structure of Blockchain FREE CHAPTER 3. Decentralization Versus Distributed Systems 4. Cryptography and Mechanics Behind Blockchain 5. Bitcoin 6. Altcoins 7. Achieving Consensus 8. Advanced Blockchain Concepts 9. Cryptocurrency Wallets 10. Alternate Blockchains 11. Hyperledger and Enterprise Blockchains 12. Ethereum 101 13. Solidity 101 14. Smart Contracts 15. Ethereum Development 16. Ethereum Accounts and Ether Tokens 17. Decentralized Applications 18. Mining 19. ICO 101 20. Creating Your Own Currency 21. Scalability and Other Challenges 22. Future of Blockchain 23. Other Books You May Enjoy

Blocks

The transaction data is recorded in files, and these files are known as blocks. The blocks are stacked on top of one another, the most recent block being at the top. The following table depicts the structure of the block and the size of the elements in a block:

Every block in the Bitcoin network has almost the same structure, and each of the blocks is chained to the most recent block. These are the fields of the block:

  • Magic number: This number is an identifier for the blockchain network. Its value is always constant at 0xD9B4BEF9. It confirms the start of the block and verifies that the data is from the production network.
  • Block size: This signifies the size of the block.
  • Block header: A header contains the metadata of the block. It comprises multiple items of data, such as the Bitcoin version, the previous block hash, Merkle root, timestamp, mining difficulty, and nonce...
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