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 Building Full Stack DeFi Applications

Building Full Stack DeFi Applications

By : Zhou
4.6 (5)
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 Building Full Stack DeFi Applications

Building Full Stack DeFi Applications

4.6 (5)
By: Zhou

Overview of this book

Enter the world of Decentralized Finance (DeFi) with Building Full Stack DeFi Applications. Understand how this blockchain-based financial technology, designed to manage crypto assets, runs independently without centralized financial institutions like banks and brokerages, eliminating the fees that banks and other financial companies charge for using their services. This book will show you how DeFi solutions are built with smart contracts running on blockchains and how they allow users to gain and earn crypto assets based on the trust of the smart contracts. This book uncovers the inner workings of DeFi by guiding you through the mathematical foundations and teaching you how to build real-world DeFi products with Solidity and JavaScript. As you progress through the chapters, you’ll learn how to implement smart contracts of liquidity pools to trade cryptocurrencies and implement staking, including farming features that allow users to earn. You’ll also find out how to create asset pools that allow users to lend and borrow cryptocurrencies and generate interest. Additionally, you’ll discover how to use Web3 libraries to build the frontend of DeFi products. By the end of this book, you’ll will be well acquainted with popular tools, libraries, and design patterns for implementing a full-stack DeFi application with Web3 and Solidity.
Table of Contents (21 chapters)
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1
Part 1: Introduction to DeFi Application Development
5
Part 2: Design and Implementation of a DeFi Application for Trading Cryptos
11
Part 3: Building a DeFi Application for Staking and Yield Farming
14
Part 4: Building a Crypto Loan App for Lending and Borrowing

Reading data from blockchain

When you access a blockchain explorer such as https://etherscan.io/, you will get the data such as the total supply or number of holders of a token. Some of the data can be retrieved directly from a smart contract by calling its functions. Some of the data such as historical transactions can be read from blocks. In this section, we will mainly focus on retrieving information by calling the smart contract function. To be more specific, we will add the total supply and current user balance on the UI shown in Figure 3.1. For how to read data from blocks, please refer to the ethers.js official documentation at https://docs.ethers.org/v5/api/providers/provider/ and check the getBlockWithTransactions function.

The source code we are going to add is located in the src/frontend/features/TokenOperations/index.js file. This is the main JavaScript file for the TOKEN OPERATIONS feature we’ll implement in the remaining sections of this chapter.

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