Ethereum Lottery

Overview

This project is a blockchain-based lottery which allows users to enter by paying the entry fee of $50 USD. The winner is determined by obtaining a verifiably random number from a Chainlink oracle, and paying out the contract balance to the corresponding user. The purpose of this project is to gain experience with powerful tools such as Hardhat, Chainlink and OpenZeppelin.

Setup

Clone the repository
Run npm install
Create a secrets.json file with the following contents:

    {
        "alchemyMainnetUrl": "",
        "alchemyRinkebyUrl": "",
        "rinkebySecretKey": ""
    }

Deploying locally

Open a terminal window and run npx hardhat node
Open a second terminal window
Run npx hardhat run scripts/deploy.js --network localhost
Note the addresses of the Lottery and LinkToken contracts

Testing

Unit test: run npx hardhat test
Integration test: run npx hardhat run test/test_lottery_integration --network rinkeby

Tasks

Run npx hardhat startLottery <Lottery address> --network localhost
Run npx hardhat enterLottery <Lottery address> --network localhost
Run npx hardhat fundWithLink <Lottery address> <LinkToken address> --network localhost
Run npx hardhat endLottery <Lottery address> --network localhost

npx hardhat deploy --network localhost // localhost npx hardhat deploy --network hardhat // hardhat npx hardhat deploy --network rinkeby // rinkeby

npx hardhat test --network localhost // localhost npx hardhat test --network hardhat // hardhat npx hardhat test --network rinkeby // rinkeby

TROUBLESHOOT

Could not resolve dependency DeborahK/Angular-GettingStarted#143 dethcrypto/TypeChain#406

npm outdated npm i --force

myhendry / lottery