Creating a full-stack DeFi app with Polygon

Decentralized finance (DeFi) has become a significant topic in the cryptocurrency industry due to its peer-to-peer transaction model that eliminates the need for a central authority. The article provides a detailed tutorial on creating a full-stack DeFi application on the Polygon blockchain using Next.js for the front end, which involves selling and purchasing a fictional token named OKToken. The process includes setting up a Hardhat project for Solidity smart contracts, deploying them to the Polygon Mumbai testnet, and building the Next.js application with the thirdweb provider to facilitate user authentication and contract interaction. The tutorial walks through creating and deploying ERC-20 and vendor contracts to handle token transactions, and provides code snippets for both smart contracts and the Next.js app. It emphasizes understanding Solidity and the deployment process, encouraging customization and experimentation with the code to enhance learning and application development.