This is a simple express app that uses ethers.js to retrieve data from Ethereum. There are a few basic routes getting the ERC20 supply for the TrueFi token, meant to be used as an example for anyone that wants to build a simple service in ethers.js
yarn
PRIVATE_KEY={private_key} yarn start
ethers.js https://docs.ethers.io/v5/
typescript: https://www.typescriptlang.org/
express: https://expressjs.com/
yarn: https://yarnpkg.com/