MemeVesting

{{
  "language": "Solidity",
  "sources": {
    "contracts/MemeVestingBiweekly.sol": {
      "content": "// SPDX-License-Identifier: MIT\r
pragma solidity 0.8.30;\r
\r
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";\r
\r
/**\r
 * @title MemeVesting (Bi-Weekly, 11 Months)\r
 * @notice\r
 *  • After `fund(amount)` (callable once), the beneficiary may withdraw\r
 *    1/TOTAL_PERIODS of `amount` every 14 days.\r
 *  • `amount` must be divisible by TOTAL_PERIODS.\r
 *  • MemeDAO wallet (`dao`) can withdraw any amount at any time via `daoWithdraw`.\r
 */\r
contract MemeVesting {\r
    /* ────────── Immutable configuration ────────── */\r
    IERC20  public immutable token;\r
    address public immutable beneficiary;\r
    address public immutable dao;\r
\r
    /* ────────── Vesting state (set in fund()) ────────── */\r
    uint256 public startTime;         // timestamp of funding\r
    uint256 public initialAmount;     // total tokens funded\r
    uint256 public biweeklyAmount;    // initialAmount / TOTAL_PERIODS\r
    uint8   public periodsClaimed;    // 0-TOTAL_PERIODS\r
    bool    public funded;\r
\r
    uint256 private constant PERIOD = 14 days;\r
    uint8   private constant TOTAL_PERIODS = 24;\r
\r
    /* ────────── Constructor ────────── */\r
    constructor(IERC20 _token, address _beneficiary, address _dao) {\r
        require(_beneficiary != address(0), "Beneficiary zero addr");\r
        require(_dao         != address(0), "DAO zero addr");\r
\r
        token       = _token;\r
        beneficiary = _beneficiary;\r
        dao         = _dao;\r
    }\r
\r
    /* ────────── Funding (one-time) ────────── */\r
    function fund(uint256 amount) external {\r
        require(!funded,            "Already funded");\r
        require(amount > 0,         "Amount is zero");\r
        require(amount % TOTAL_PERIODS == 0, "Amount not divisible by periods");\r
\r
        require(token.transferFrom(msg.sender, address(this), amount),\r
                "transferFrom failed");\r
\r
        funded         = true;\r
        startTime      = block.timestamp;\r
        initialAmount  = amount;\r
        biweeklyAmount = amount / TOTAL_PERIODS;\r
    }\r
\r
    /* ────────── Modifiers ────────── */\r
    modifier onlyBeneficiary() { require(msg.sender == beneficiary, "Not beneficiary"); _; }\r
    modifier onlyDAO()         { require(msg.sender == dao,         "Not MemeDAO");     _; }\r
    modifier whenFunded()      { require(funded,                    "Not funded yet");  _; }\r
\r
    /* ────────── View helper ────────── */\r
    /// @return secondsLeft 0 if a withdrawal is currently possible,\r
    ///                     or seconds until the next tranche unlocks.\r
    function timeUntilNextWithdraw() external view returns (uint256 secondsLeft) {\r
        if (!funded || periodsClaimed >= TOTAL_PERIODS) {\r
            return 0; // not funded yet OR everything already claimed\r
        }\r
\r
        uint256 nextUnlock = startTime + (uint256(periodsClaimed) + 1) * PERIOD;\r
\r
        if (block.timestamp >= nextUnlock) {\r
            return 0; // tranche already unlocked\r
        }\r
        return nextUnlock - block.timestamp;\r
    }\r
\r
    /* ────────── Beneficiary interface ────────── */\r
    function withdraw() external onlyBeneficiary whenFunded {\r
        uint8 elapsed = uint8((block.timestamp - startTime) / PERIOD);\r
        if (elapsed > TOTAL_PERIODS) elapsed = TOTAL_PERIODS;\r
\r
        require(elapsed > periodsClaimed, "Nothing to withdraw");\r
\r
        uint8  periodsOwed = elapsed - periodsClaimed;\r
        uint256 amount     = uint256(periodsOwed) * biweeklyAmount;\r
\r
        periodsClaimed = elapsed;\r
        require(token.transfer(beneficiary, amount), "transfer failed");\r
    }\r
\r
    /* ────────── MemeDAO override interface ────────── */\r
    function daoWithdraw(uint256 amount) external onlyDAO whenFunded {\r
        require(token.transfer(dao, amount), "transfer failed");\r
    }\r
}\r
"
    },
    "@openzeppelin/contracts/token/ERC20/IERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @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 value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

    /**
     * @dev Moves a `value` amount of 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 value) 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 a `value` amount of tokens 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 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` 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 value) external returns (bool);
}
"
    }
  },
  "settings": {
    "optimizer": {
      "enabled": true,
      "runs": 200
    },
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    },
    "remappings": []
  }
}}