Summary

In this chapter, we started to build a project to host all the DeFi applications we will build in this book. We used Node.js, React.js, and Hardhat for creating the project and learned how to use Hardhat to run a local EVM and build, deploy, and run smart contracts in the EVM environment. We also explored deploying smart contracts in Testnet, and we can use the same approach to deploy them in Mainnet. At the end of this chapter, we introduced using the Hardhat console to run and verify smart contract functions, write automated test cases, and debug smart contracts with the chai testing library in the Hardhat environment.

In the next chapter, we will start building the frontend pieces of the project and learn how to connect the smart contract running on a blockchain with JavaScript code that will run in web browsers. We will also introduce how to connect wallets with JavaScript and make transactions by interacting with a smart contract.