Hello world Zksync

This guide shows you how to deploy a smart contract to zkSync and build a dApp that interacts with it using the zkSync development toolbox.

This is what we're going to do:

Build, deploy, and verify a smart contract on zkSync Era testnet that stores a greeting message. Build a dApp that retrieves and updates the greeting message. Allow users to change the greeting message on the smart contract via the app. Show you how to implement the testnet paymaster that allows users to pay transaction fees with ERC20 tokens instead of ETH