Book Image

Hands-On Blockchain for Python Developers

By : Arjuna Sky Kok
Book Image

Hands-On Blockchain for Python Developers

By: Arjuna Sky Kok

Overview of this book

Blockchain is seen as the main technological solution that works as a public ledger for all cryptocurrency transactions. This book serves as a practical guide to developing a full-fledged decentralized application with Python to interact with the various building blocks of blockchain applications. Hands-On Blockchain for Python Developers starts by demonstrating how blockchain technology and cryptocurrency hashing works. You will understand the fundamentals and benefits of smart contracts such as censorship resistance and transaction accuracy. As you steadily progress, you'll go on to build smart contracts using Vyper, which has a similar syntax to Python. This experience will further help you unravel the other benefits of smart contracts, including reliable storage and backup, and efficiency. You'll also use web3.py to interact with smart contracts and leverage the power of both the web3.py and Populus framework to build decentralized applications that offer security and seamless integration with cryptocurrencies. As you explore later chapters, you'll learn how to create your own token on top of Ethereum and build a cryptocurrency wallet graphical user interface (GUI) that can handle Ethereum and Ethereum Request for Comments (ERC-20) tokens using the PySide2 library. This will enable users to seamlessly store, send, and receive digital money. Toward the end, you'll implement InterPlanetary File System (IPFS) technology in your decentralized application to provide a peer-to-peer filesystem that can store and expose media. By the end of this book, you'll be well-versed in blockchain programming and be able to build end-to-end decentralized applications on a range of domains using Python.
Table of Contents (19 chapters)
Free Chapter
1
Section 1: Blockchain and Smart Contracts
5
Section 2: Web3 and Populus
9
Section 3: Frontend Decentralized Applications
11
Section 4: Cryptocurrency and Wallets
14
Section 5: Decentralized Filesystem

Summary

In this chapter, you have learned about interacting with the IPFS through the HTTP API using Python. First of all, you installed IPFS software and ran the daemon. You started this by adding a file to the IPFS and studied how to get the hash of the content of the file, which is based on protobuf, multihash, and base58. Then, you saw that a big file would be divided into many chunks if added to the IPFS. You could also add a directory of files into the IPFS. Based on this ability, you could host a static website on the IPFS. Then, you learned about publishing IPFS files in the IPNS on which you could have dynamic content. After this, you learned about the MFS, where you could copy a large file from the IPFS without incurring any significant costs in your local storage.

In the next chapter, you will combine the IPFS and smart contracts to build a decentralized application...