Basic Greeting Contract with Hardhat

Localhost

• npm run node:localhost
• npm run deploy:localhost
• npm start

Ropsten

• set ROPSTEN_PRIVATE_KEY as env var export ROPSTEN_PRIVATE_KEY=0x...
• npm run deploy:ropsten
• npm start

App

• Set the address contract to the return value of running npm run deploy:xxx
• Set the new value and sign the transaction using Metamask