1. User can enter lottery with ETH based on USD fee (let say the entry fee is $50, this will be payed in ETH base on its current price)
2. An admin will choose when the lottery is over
3. The lottery will select a random winner

You need to add a .envfile with the following content (modified with your personal datas). ETHERSCAN_TOKEN is your api key from Etherscan to verify your contracts.

export PRIVATE_KEY=0x123412341234
export WEB3_INFURA_PROJECT_ID=123412341234
export ETHERSCAN_TOKEN=123412341234