Created
September 26, 2018 04:50
-
-
Save thakursaurabh1998/be0f3e55a5c420911cd64c2358a17c5a to your computer and use it in GitHub Desktop.
Smart 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
// solium-disable linebreak-style | |
pragma solidity ^0.4.24; | |
contract Election { | |
struct Candidate { | |
uint id; | |
string name; | |
uint voteCount; | |
} | |
// Map of candidates | |
mapping(uint => Candidate) public candidates; | |
// map of voters who have voted | |
mapping(address => bool) public voters; | |
// storing count of candidates | |
uint public candidatesCount; | |
event votedEvent( | |
uint indexed _candidateId | |
); | |
constructor() public { | |
addCandidate("Candidate 1"); | |
addCandidate("Candidate 2"); | |
} | |
function addCandidate (string _name) private { | |
candidatesCount++; | |
candidates[candidatesCount] = Candidate(candidatesCount, _name, 0); | |
} | |
function vote (uint _candidateId) public { | |
// require that they haven't voted before | |
require(!voters[msg.sender], "Already Voted"); | |
// require a valid candidate | |
require(_candidateId > 0 && _candidateId <= candidatesCount, "Invalid Candidate"); | |
voters[msg.sender] = true; | |
candidates[_candidateId].voteCount++; | |
emit votedEvent(_candidateId); | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment