This Solidity smart contract implements a simple lottery system where participants can enter the lottery by sending 1 Ether to the contract. Once enough participants have entered, the manager can select a random winner to receive the accumulated Ether.
- Manager Role: The contract deployer becomes the manager and has exclusive control over certain functions like checking the balance and selecting the winner.
- Entry Fee: Participants must send exactly 1 Ether to join the lottery.
- Random Winner Selection: A pseudo-random mechanism selects the winner from the participants.
- Payout: The winner receives all Ether accumulated in the contract.
- Reset Mechanism: After selecting a winner, the participants list is reset for a new round.
- constructor(): Sets the deployer of the contract as the manager.
- receive() external payable: Enables the contract to receive Ether and adds the sender to the participants list if 1 Ether is sent.
- getBalance(): Allows the manager to view the contract's balance.
- random(): Generates a pseudo-random number using block properties and participant count.
- selectWinner(): Requires at least 3 participants and manager privileges to select a random winner, transfer the prize, and reset the lottery.
- Deploy the contract on a compatible Ethereum network.
- Participants can enter the lottery by sending exactly 1 Ether to the contract's address.
- Once there are at least 3 participants, the manager can call
selectWinner()to choose a winner and reset the lottery for the next round.
This contract uses a pseudo-random number generator, which is not secure for production-grade lotteries. For secure randomness, consider integrating Chainlink VRF or similar services.