This is a sub-package of web3.js.
This Eth package is used within some web3.js packages.
Please read the documentation for more.
You can install the package either using NPM or using Yarn
npm install web3-atl
yarn add web3-atl
const Web3Atl = require('web3-atl');
const atl = new Web3Atl('ws://localhost:8546');
All the TypeScript typings are placed in the types
folder.