dione/eth-contracts/contracts/DioneDispute.sol

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pragma solidity ^0.8.0;
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import "@openzeppelin/contracts/utils/math/SafeMath.sol";
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import "./interfaces/IDioneStaking.sol";
contract DioneDispute {
IDioneStaking public dioneStaking;
uint256 public voteWindowTime;
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// Minimum amount of DIONE tokens required to vote to dispute
uint256 public minStake;
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struct Dispute {
bytes32 dhash; // id of dispute - keccak256(_miner,_requestId,_timestamp)
int256 sum; // vote measure (for/against this dispute)
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bool finished; // dispute was finished (closed) or not
bool disputeResult; // true - dispute had basis, false - dispute was false
address miner; // the miner against whom the dispute
address disputeInitiator; // the miner who started the dispute
uint256 timestamp; // dispute creation timestamp
address[] voted; // map of miners who vote for/against
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}
modifier onlyExistingDispute(bytes32 _dhash) {
require(disputes[_dhash].disputeInitiator != address(0), "dispute doesn't exist");
_;
}
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mapping(bytes32 => Dispute) disputes;
event NewDispute(bytes32 dhash, uint256 requestID, address indexed miner, address indexed disputeInitiator);
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event NewVote(bytes32 dhash, address indexed votedMiner);
event DisputeFinished(bytes32 dhash, bool status);
constructor(IDioneStaking _dioneStaking, uint256 _voteWindowTime, uint256 _minStake) {
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dioneStaking = _dioneStaking;
voteWindowTime = _voteWindowTime;
minStake = _minStake;
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}
function beginDispute(address miner, uint256 requestID) public {
bytes32 dhash = keccak256(abi.encodePacked(miner, requestID));
require(disputes[dhash].miner == address(0), "dispute already exists");
require(dioneStaking.isMiner(msg.sender), "caller isn't dione miner");
Dispute storage dispute = disputes[dhash];
dispute.dhash = dhash;
dispute.sum = 0;
dispute.finished = false;
dispute.disputeResult = false;
dispute.miner = miner;
dispute.timestamp = block.timestamp;
dispute.disputeInitiator = msg.sender;
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disputes[dhash] = dispute;
emit NewDispute(dhash, requestID, miner, msg.sender);
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}
function vote(bytes32 dhash, bool voteStatus) public onlyExistingDispute(dhash) {
Dispute memory dispute = disputes[dhash];
require(dispute.finished == false, "dispute already finished");
require(msg.sender != dispute.disputeInitiator, "dispute initiator isn't allowed to vote");
require(msg.sender != dispute.miner, "the miner against whom dispute has beginned isn't allowed to vote");
require(dioneStaking.isMiner(msg.sender), "caller isn't dione miner");
require(dioneStaking.minerStake(msg.sender) >= minStake, "miner doesn't have minimum stake to vote");
uint256 stake = dioneStaking.minerStake(msg.sender);
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if (voteStatus) {
disputes[dhash].sum = disputes[dhash].sum + int256(stake);
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} else {
disputes[dhash].sum = disputes[dhash].sum - int256(stake);
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}
disputes[dhash].voted.push(msg.sender);
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emit NewVote(dhash, msg.sender);
}
function finishDispute(bytes32 dhash) public onlyExistingDispute(dhash) {
Dispute memory dispute = disputes[dhash];
require((block.timestamp - dispute.timestamp) >= voteWindowTime, "vote window hasn't passed yet");
require(dispute.finished == false, "dispute already finished");
require(dispute.disputeInitiator == msg.sender, "only dispute initiator can call this function");
if (dispute.sum <= 0) {
disputes[dhash].disputeResult = false;
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} else {
disputes[dhash].disputeResult = true;
disputes[dhash].voted.push(msg.sender);
dioneStaking.slashMiner(dispute.miner, disputes[dhash].voted);
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}
disputes[dhash].finished = true;
emit DisputeFinished(dhash, disputes[dhash].disputeResult);
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}
}