Voting contracts

master
six 2022-03-24 17:26:50 +01:00
parent 76708a8bbd
commit 3b5044bc37
3 changed files with 130 additions and 1 deletions

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@ -8,7 +8,9 @@ Lesson 2. Using git (git.hsbp.org, git command, init, add, commit, pull, push, u
Lesson 3. Second chapter of CryptoZombies (return, mappings, require, inheritance, import, interfaces, multi return, keccak if str Lesson 3. Second chapter of CryptoZombies (return, mappings, require, inheritance, import, interfaces, multi return, keccak if str
Lesson 4. TBA Lesson 4. Voting in solidity
Lesson 5. Code review and due diligence
## Notes ## Notes

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// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.13;
contract Voting{
struct Vote_state {
bool voted;
}
mapping(address => bool) private Voters;
uint256 nft = 0;
uint256 dao = 0;
uint256 token = 0;
constructor() {
Voters[0x5B38Da6a701c568545dCfcB03FcB875f56beddC4] = false;
}
function vote(uint256 option) external returns (bool) {
require(Voters[msg.sender] == false, "Already voted or non-existent.");
if (option == 1) {
Voters[msg.sender] = true;
nft = nft + 1;
return true;
}
if (option == 2) {
Voters[msg.sender] = true;
dao = dao + 1;
return true;
}
if (option == 3) {
Voters[msg.sender] = true;
token = token + 1;
return true;
}
return false;
}
function result() external view returns (string memory){
if (nft > dao && nft > token) {
return "nft";}
else if (dao > nft && dao > token){
return "dao";}
else if (token > nft && token > dao){
return "token";}
return "couldnt decide";
}
}

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// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.13;
contract BallotDraft {
struct ballotVoter {
uint delegateWeight;
bool voteSpent;
address delegateTo;
uint voteIndex;
}
struct Proposal {
bytes32 proposalName;
uint voteCount;
}
address public chairman;
mapping(address => ballotVoter) public ballotVoters;
Proposal[] public proposalsOption;
function Ballot(bytes32[] proposalNames) external {
chairman = msg.sender;
ballotVoters[chairman].delegateWeight = 1;
for (uint i = 0; i < proposalNames.length; i++) {
proposalsOption.push(Proposal({
proposalName: proposalNames[i] ,
voteCount: 0
}));
}
}
function giveVotingRights(address ballotVoter) external {
require((msg.sender == chairman) && !ballotVoters[ballotvoter].voteSpent && (ballotVoters[ballotvoter].delegateWeight == 0));
ballotVoters[ballotvoter].delegateWeight = 1;
}
function delegateTo(address to) external {
ballotVoter storage sender = ballotVoters[msg.sender];
require(!sender.voteSpent);
require(to != msg.sender);
while (ballotVoters[to].delegateTo != address(0)) {
to = ballotVoters[to].delegateTo;
require(to != msg.sender);
}
sender.voteSpent = true;
sender.delegateTo = to;
ballotVoter storage delegateTo = ballotVoters[to];
if (delegateTo.voteSpent) {
proposalsOption[delegateTo.voteIndex].voteCount += sender.delegateWeight;
} else {
delegateTo.delegateWeight += sender.delegateWeight;
}
}
function voteIndex(uint proposal) external {
ballotVoter storage sender = ballotVoters[msg.sender];
require(!sender.voteSpent);
sender.voteSpent = true;
sender.voteIndex = proposal;
proposalsOption[proposal].voteCount += sender.delegateWeight;
}
function winnerProposal() external returns (uint winnerProposal) {
uint winnerVoteCount = 0;
for (uint p = 0; p < proposalsOption.length; p++) {
if (proposalsOption[p].voteCount > winnerVoteCount) {
winnerVoteCount = proposalsOption[p].voteCount;
winnerProposal = p;
}
}
}
function winner() external
returns (bytes32 winner)
{
winner = proposalsOption[winnerProposal()].proposalName;
}
}