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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

Generating token swapping paths

In this section, we will dive into the implementation of generating swapping paths. Similar to the liquidity provisioning page, AddLiquidity.js, which we discussed in Chapter 6, Implementing a Liquidity Management Frontend with Web3 we use the TokenSelectModal component for token selection. Once both tokens are selected, we will find all available paths from one token to another token. By reading this section, you will learn how to write the code to build the graph with the token pair information of a DEX, and how to find the swapping paths once after the tokens are selected.

Building the graph for token pairs

In order to find all available paths from spending tokens to receiving tokens, we can use the data structure of a bidirectional graph to represent all the token pairs of the DEX. The addresses of supported tokens of the DEX are the graph nodes, and all the token pairs (the smart contract instance of TokenPair that represents the paired tokens...

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