Install dependencies steps

1. Install node on MacOS, if other operating system refer to https://hardhat.org/tutorial/setting-up-the-environment.

   curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
   nvm install 20
   nvm use 20
   nvm alias default 20
   npm install npm --global # Upgrade npm to the latest version

2. Install dependencies

   npm install

Deply contracts

1. Deploy STCore.sol
2. Deploy Earn.sol using STCore's address
3. Call STCore's setEarnAddress(address _earn) using Earn's address
4. Call Earn's updateOperator(address _operator)
5. Call Earn's updateProtocolFeeReveiver(address _protocolFeeReceiver)