This smart contract, written in Solidity, implements a simple lottery system on the Ethereum blockchain. It allows participants to enter the lottery by sending a specified amount of Ether and enables the contract manager to randomly pick a winner who receives the entire lottery pot.
The Lotery.sol contract provides the following functionalities:
- Entering the Lottery: Participants can enter the lottery by sending at least 0.1 Ether.
- Picking a Winner: The contract manager, who is initially set as the contract deployer, can initiate the selection of a winner. The winner is randomly chosen among the participants, and the entire lottery balance is transferred to them.
- Manager Access: Certain functionalities are restricted to the contract manager, including picking the winner.
enter(): Allows participants to enter the lottery by sending a minimum amount of Ether.pickWinner(): Can be called only by the contract manager. Randomly selects a winner and transfers the entire lottery balance to them.getPlayers(): Retrieves the addresses of participants who entered the lottery.
To interact with the lottery contract:
- Deploy the
Lotery.solcontract to an Ethereum network (e.g., Ropsten, Rinkeby, or a local testnet). - Use a Web3 provider or a DApp interface to:
- Enter the lottery by sending the required Ether using the
enter()function. - Use the
pickWinner()function (accessible only to the contract manager) to select a winner.
- Enter the lottery by sending the required Ether using the
- Node.js
- Solidity Compiler (
solc) - Web3 library (if interacting with the contract programmatically)
- Clone this repository:
git clone https://github.com/your-username/lottery-smart-contract.git - Install dependencies:
npm install
Run the provided test suite to verify contract functionality:
npm test