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 to interact with smart contracts and leverage the power of both the 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
Section 1: Blockchain and Smart Contracts
Section 2: Web3 and Populus
Section 3: Frontend Decentralized Applications
Section 4: Cryptocurrency and Wallets
Section 5: Decentralized Filesystem

Deploying a smart contract to Ganache

So how do you deploy this smart contract to the Ethereum blockchain? There are few ways to do this, but let’s employ a familiar way using Truffle:

  1. Create a directory and initialize it with truffle init as follows:
$ mkdir hello_project
$ cd hello_project
$ truffle init
  1. Just as you did in the previous chapter, set truffle-config.js as the following:
module.exports = {
networks: {
"development": {
network_id: 5777,
host: "localhost",
port: 7545
  1. Create a build directory, as follows:
$ mkdir -p build/contracts
$ cd build/contracts
  1. Then create a Hello.json file there, as follows:
  1. Then fill the abi field with abi or json output from the compilation process, and fill the bytecode field with the bytecode output from the compilation process. You...