Contract 0xE0717485C7E1FbB7f78D205f3DA471cae7BfdC2B

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) external returns (bool);
}

//SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";


contract MuDAO{

    enum VotingOptions { Yes, No }
    enum Status { Accepted, Rejected, Pending }
    struct Proposal {
        uint256 id;
        address author;
        string name;
        string description;
        uint256 createdAt;
        uint256 votesForYes;
        uint256 votesForNo;
        Status status;
    }

    // store all proposals
mapping(uint => Proposal) public proposals;
// who already votes for who and to avoid vote twice
mapping(address => mapping(uint => bool)) public votes;
// one share for governance tokens
mapping(address => uint256) public shares;
uint public totalShares;
// the IERC20 allow us to use MUO like our governance token.
IERC20 public token;
// the user need minimum 25 MUO to create a proposal.
uint constant CREATE_PROPOSAL_MIN_SHARE = 25 * 10 ** 18;
uint constant VOTING_PERIOD = 14 days;
uint public nextProposalId;


constructor() {
    token = IERC20(0x561f2209eA45023d796bF42F0402B33bc26610ce); // MUO address
}

function deposit(uint _amount) external {
    shares[msg.sender] += _amount;
    totalShares += _amount;
    token.transferFrom(msg.sender, address(this), _amount);
}


function withdraw(uint _amount) external {
    require(shares[msg.sender] >= _amount, 'Not enough shares');
    shares[msg.sender] -= _amount;
    totalShares -= _amount;
    token.transfer(msg.sender, _amount);
}

function createProposal(string memory name, string memory description) external {
    // validate the user has enough shares to create a proposal
    require(shares[msg.sender] >= CREATE_PROPOSAL_MIN_SHARE, 'Not enough shares to create a proposal');
    
    proposals[nextProposalId] = Proposal(
        nextProposalId,
        msg.sender,
        name,
        description,
        block.timestamp,
        0,
        0,
        Status.Pending
    );
    nextProposalId++;
}

function vote(uint _proposalId, VotingOptions _vote) external {
    Proposal storage proposal = proposals[_proposalId];
    require(votes[msg.sender][_proposalId] == false, 'already voted');
    require(block.timestamp <= proposal.createdAt + VOTING_PERIOD, 'Voting period is over');
    votes[msg.sender][_proposalId] = true;
    if(_vote == VotingOptions.Yes) {
        proposal.votesForYes += shares[msg.sender];
        if(proposal.votesForYes * 100 / totalShares > 50) {
            proposal.status = Status.Accepted;
        }
    } else {
        proposal.votesForNo += shares[msg.sender];
        if(proposal.votesForNo * 100 / totalShares > 50) {
            proposal.status = Status.Rejected;
        }
    }
}

}

{
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"description","type":"string"}],"name":"createProposal","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"deposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"nextProposalId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"proposals","outputs":[{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"address","name":"author","type":"address"},{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"description","type":"string"},{"internalType":"uint256","name":"createdAt","type":"uint256"},{"internalType":"uint256","name":"votesForYes","type":"uint256"},{"internalType":"uint256","name":"votesForNo","type":"uint256"},{"internalType":"enum MuDAO.Status","name":"status","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"shares","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"token","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalShares","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_proposalId","type":"uint256"},{"internalType":"enum MuDAO.VotingOptions","name":"_vote","type":"uint8"}],"name":"vote","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"votes","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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