Created
February 21, 2021 14:42
-
-
Save kennym/751122784cab42c368e1005981d744c9 to your computer and use it in GitHub Desktop.
Lottery contract
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
pragma solidity ^0.4.17; | |
contract Lottery { | |
address public manager; | |
address[] public players; | |
constructor() public { | |
manager = msg.sender; | |
} | |
function enter() public payable { | |
require(msg.value > .01 ether); | |
players.push(msg.sender); | |
} | |
function random() private view returns (uint256) { | |
return uint(keccak256(abi.encodePacked(block.difficulty, now, players))); | |
} | |
function pickWinner() public { | |
// Make sure the winner is picked by the manager not anyone else | |
require(msg.sender === manger); | |
uint index = random() % players.length; | |
players[index].transfer(address(this).balance); | |
players = new address[](0) | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment