Vote
This is a Vote contract that allows you to establish election event with it's period, candidate list using ERC20 tokens as voices.
Some crucial features
There are some features that should be described before using this "project".
Token contract which is TestToken.sol follows ERC20 standart, but minting and burning methods do not check if they were called by the contract owner. There is an owner modifier, but it is documented. That was done to make tests easier. Actually there aren't any require and checks, because it's a test erc20. It is assumed, that for voting will be used another, secure erc20 token contract.
Concerning Vote contract it should be mentioned that uint votingDeadline stores deadline in seconds. That was done due to the same reason that was mentioned previously. In order to use the contract on your personal purposes I strongly recomend to change seconds in constructor function. And of course timeLimit param in migration .js file should be chanched too.
Tests were made to check if the contract and its methods behave like they should. So, tests require:
- Minting tokens for 3 addresses, stated before tests (they were taken from Ganache GUI. You can access them with
accounts[i]too) - Setting allowance for the Vote contract;
- Registering the addresses in the Vote contract and voting for the choosen candidate;
- Ending vote event with finding a winner and rewarding those who gave voices for a winner with losers tokens. A Rewards is given to a winner in accordance with his voice - token stake in a winning group.
Commit-reveal contract
You can test a VoteCR.sol contract, which uses commit - reveal mechanism. Almost all the methods are the same. The main difference between these contracts is that each voter should check if he won, because Vote.sol required one voter to send Tx to the honorWinners() method to honor winners.
The mechanism of getting hex, concatenated secret and candidate values is described below.
pragma solidity ^0.5.0;
contract Test{
function getConcatenatedValue(bytes32 _secret, bytes32 _candidate) public pure returns (bytes memory){
bytes memory a = abi.encodePacked(_secret, _candidate);
return a;
}
function getHash(bytes32 _secret, bytes32 _candidate) public pure returns (bytes32) {
bytes memory a = abi.encodePacked(_secret, _candidate);
return keccak256(a);
}
}Requirements
- Truffle - better the latest (v5.0.0)
- Solidity v0.5.0 (solc-js)
- Node v9.11.2
- Ganache (GUI was used for this)
Test it (run it)
Make sure you have Chai and Mocha node modules
- Ganache GUI (truffle-config should suit ganache settings)
truffle test- Enjoy