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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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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

Deploying smart contracts

Smart contracts may or may not be deployed on a blockchain, but it makes sense to do so on a blockchain due to the security and decentralized consensus mechanism provided by the blockchain. Ethereum is an example of a blockchain platform that natively supports the development and deployment of smart contracts. We will cover Ethereum in more detail later in this book, in Chapter 11, Ethereum 101. Smart contracts on an Ethereum blockchain are typically part of a broader DApp.

In comparison, in a Bitcoin blockchain, the transaction timelocks, such as the nLocktime field, the CHECKLOCKTIMEVERIFY (CLTV), and the CHECKSEQUENCEVERIFY script operator in the Bitcoin transaction, can be seen as an enabler of a simple version of a smart contract. These timelocks enable a transaction to be locked until a specified time or until a number of blocks, thus enforcing a basic contract that a certain transaction can only be unlocked if certain conditions (elapsed time...

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