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Hands-On Blockchain for Python Developers

You're reading from   Hands-On Blockchain for Python Developers Gain blockchain programming skills to build decentralized applications using Python

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Product type Paperback
Published in Feb 2019
Publisher Packt
ISBN-13 9781788627856
Length 450 pages
Edition 1st Edition
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Author (1):
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Arjuna Sky Kok Arjuna Sky Kok
Author Profile Icon Arjuna Sky Kok
Arjuna Sky Kok
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Toc

Table of Contents (19) Chapters Close

Preface 1. Section 1: Blockchain and Smart Contracts FREE CHAPTER
2. Introduction to Blockchain Programming 3. Smart Contract Fundamentals 4. Implementing Smart Contracts Using Vyper 5. Section 2: Web3 and Populus
6. Interacting with Smart Contracts Using Web3 7. Populus Development Framework 8. Building a Practical Decentralized Application 9. Section 3: Frontend Decentralized Applications
10. Frontend Decentralized Application 11. Section 4: Cryptocurrency and Wallets
12. Creating Token in Ethereum 13. Cryptocurrency Wallet 14. Section 5: Decentralized Filesystem
15. InterPlanetary - A Brave New File System 16. Using ipfsapi to Interact with IPFS 17. Implementing a Decentralized Application Using IPFS 18. Other Books You May Enjoy

Summary

In this chapter, we have studied IPFS. We started by looking at the motivations of the IPFS project and its history. Although IPFS is not a part of the blockchain technology, it is similar to blockchain because it complements blockchain technology. We then learned about the data structure of the content that we saved in the IPFS filesystem. This data structure is Merkle Directed Acyclic Graph (DAG), which is based on the Merkle tree. We created simple Merkle tree and Merkle DAG libraries to understand the uniqueness of these data structures. Merkle trees provide an easy way to check the integrity of partial data, while Merkle DAGs are used when we want to save a directory with files and we want to keep the filenames. Then, we learned about the peer-to-peer networking aspect of a Kademlia distributed hash table. The distance between nodes is based on the XOR distance. The...

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