.env.example

ETHERSCAN_API_KEY=ABC123ABC123ABC123ABC123ABC123ABC1
RINKEBY_URL=https://eth-rinkeby.alchemyapi.io/v2/<YOUR ALCHEMY KEY>
POLYGON_URL=https://polygon-rpc.com
PRIVATE_KEY=0xabc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc1