xTHORIndividualVesting

{{
  "language": "Solidity",
  "sources": {
    "@openzeppelin/contracts/access/Ownable.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}
"
    },
    "@openzeppelin/contracts/security/ReentrancyGuard.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == _ENTERED;
    }
}
"
    },
    "@openzeppelin/contracts/token/ERC20/IERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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);
}
"
    },
    "@openzeppelin/contracts/utils/Context.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}
"
    },
    "src/contracts/tokens/xTHOR.sol": {
      "content": "//SPDX-License-Identifier: MIT
pragma solidity ^0.8.17;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";

interface IuTHOR {
    function claimRewards() external;
    function balanceOf(address account) external view returns (uint256);
    function transfer(address to, uint256 amount) external returns (bool);
    function transferFrom(address from, address to, uint256 amount) external returns (bool);
    function claimable(address user) external view returns (uint256);
}

/**
 * @title xTHOR Individual Vesting Contract
 * @notice Single beneficiary vesting contract for uTHOR tokens with independent USDC reward claiming
 * @dev Each contract is deployed for one individual beneficiary
 */
contract xTHORIndividualVesting is Ownable, ReentrancyGuard {
    
    // The uTHOR token contract
    IuTHOR public immutable uTHOR;
    
    // The USDC reward token contract  
    IERC20 public immutable rewardToken;
    
    // The beneficiary who can claim tokens and rewards
    address public immutable beneficiary;
    
    // Vesting parameters
    uint256 public immutable totalAmount;      // Total uTHOR tokens to vest
    uint256 public immutable startTime;       // Vesting start time
    uint256 public immutable cliffDuration;   // Cliff period in seconds
    uint256 public immutable vestingDuration; // Total vesting duration in seconds
    
    // Amount of uTHOR already released to beneficiary
    uint256 public released;

    // Amount of uTHOR withdrawn by owner in emergency (reduces effective total)
    uint256 public emergencyWithdrawn;

    // Whether claiming is enabled
    bool public claimingEnabled;
    
    // Whether vesting has been revoked
    bool public revoked;
    
    event TokensReleased(uint256 amount);
    event RewardsClaimed(uint256 amount);
    event ClaimingEnabled();
    event VestingRevoked(address indexed beneficiary, uint256 unvestedAmount);
    event EmergencyWithdrawUTHOR(uint256 amount);
    event EmergencyWithdrawUSDC(uint256 amount);
    
    modifier onlyBeneficiary() {
        require(msg.sender == beneficiary, "xTHOR: Not beneficiary");
        _;
    }
    
    constructor(
        address _uTHOR,
        address _rewardToken,
        address _beneficiary,
        uint256 _totalAmount,
        uint256 _startTime,
        uint256 _cliffDuration,
        uint256 _vestingDuration
    ) {
        require(_beneficiary != address(0), "xTHOR: Beneficiary cannot be zero address");
        require(_totalAmount > 0, "xTHOR: Total amount must be greater than 0");
        require(_vestingDuration > 0, "xTHOR: Vesting duration must be greater than 0");
        require(_cliffDuration <= _vestingDuration, "xTHOR: Cliff duration cannot exceed vesting duration");
        
        uTHOR = IuTHOR(_uTHOR);
        rewardToken = IERC20(_rewardToken);
        beneficiary = _beneficiary;
        totalAmount = _totalAmount;
        startTime = _startTime;
        cliffDuration = _cliffDuration;
        vestingDuration = _vestingDuration;
        claimingEnabled = false;
        revoked = false;
        emergencyWithdrawn = 0;
    }
    
    /**
     * @notice Claim all USDC rewards earned by the uTHOR held in this contract
     * @dev Beneficiary can claim all rewards regardless of vesting status
     */
    function claimRewards() external onlyBeneficiary nonReentrant {
        _claimRewardsInternal();
    }
    
    /**
     * @notice Internal function to claim USDC rewards
     * @dev Used by both claimRewards() and claimVested()
     */
    function _claimRewardsInternal() internal {
        uint256 balanceBefore = rewardToken.balanceOf(address(this));
        
        // 1. Harvest all USDC rewards owed to this contract from uTHOR
        uTHOR.claimRewards();
        
        // 2. Calculate actual rewards received (protect against manipulation)
        uint256 balanceAfter = rewardToken.balanceOf(address(this));
        uint256 newRewards = balanceAfter - balanceBefore;
        
        // 3. Transfer only the newly received USDC to beneficiary
        if (newRewards > 0) {
            require(rewardToken.transfer(beneficiary, newRewards), "xTHOR: USDC transfer failed");
            emit RewardsClaimed(newRewards);
        }
    }
    
    /**
     * @notice Claim vested uTHOR tokens
     * @dev Claims any pending USDC rewards FIRST, then transfers vested uTHOR
     * This is critical because once uTHOR is transferred, we lose claim to its rewards
     */
    function claimVested() external onlyBeneficiary nonReentrant {
        require(claimingEnabled, "xTHOR: Claiming not enabled");

        // Calculate vested uTHOR tokens
        uint256 vested = _vestedAmount(block.timestamp);
        uint256 unreleased = vested > released ? vested - released : 0;

        require(unreleased > 0, "xTHOR: No vested tokens available");

        // Limit transfer to actual contract balance (accounts for emergency withdrawals)
        uint256 contractBalance = uTHOR.balanceOf(address(this));
        uint256 toTransfer = unreleased > contractBalance ? contractBalance : unreleased;

        require(toTransfer > 0, "xTHOR: No tokens available for transfer");

        // CRITICAL: Claim all USDC rewards BEFORE transferring uTHOR
        // Once uTHOR leaves the contract, we lose claim to future rewards from those tokens
        _claimRewardsInternal();

        // Now transfer the available uTHOR tokens
        released += toTransfer;
        require(uTHOR.transfer(beneficiary, toTransfer), "xTHOR: uTHOR transfer failed");
        emit TokensReleased(toTransfer);
    }
    
    /**
     * @notice Get the amount of uTHOR tokens currently claimable
     * @dev Accounts for emergency withdrawals by limiting claimable to available balance
     */
    function claimableAmount() external view returns (uint256) {
        uint256 vested = _vestedAmount(block.timestamp);
        uint256 unreleased = vested > released ? vested - released : 0;

        // Limit claimable amount to actual contract balance
        uint256 contractBalance = uTHOR.balanceOf(address(this));
        return unreleased > contractBalance ? contractBalance : unreleased;
    }
    
    /**
     * @notice Get the amount of USDC rewards currently claimable
     * @dev Returns pending rewards from uTHOR (rewards go directly to beneficiary when claimed)
     */
    function claimableRewards() external view returns (uint256) {
        // Pending rewards that can be claimed from uTHOR contract
        // Note: Claimed rewards go directly to beneficiary, not to this contract
        return uTHOR.claimable(address(this));
    }
    
    /**
     * @notice Calculate vested amount at given time
     */
    function _vestedAmount(uint256 timestamp) internal view returns (uint256) {
        if (timestamp < startTime) {
            return 0;
        }
        
        // If we're before cliff, no tokens are vested
        if (timestamp < startTime + cliffDuration) {
            return 0;
        }
        
        // If vesting is complete, return total amount
        if (timestamp >= startTime + vestingDuration) {
            return totalAmount;
        }
        
        // Calculate linear vesting between cliff and end
        uint256 timeFromStart = timestamp - startTime;
        uint256 vestedFromLinear = (totalAmount * timeFromStart) / vestingDuration;
        
        return vestedFromLinear;
    }
    
    /**
     * @notice Owner can revoke the vesting schedule and reclaim unvested tokens
     * @dev This stops all future vesting and allows owner to withdraw unvested uTHOR
     */
    function revokeVesting() external onlyOwner {
        require(totalAmount > 0, "xTHOR: No vesting schedule exists");
        
        // Calculate how much has been vested so far
        uint256 vestedAmount = _vestedAmount(block.timestamp);
        uint256 unvestedAmount = totalAmount - vestedAmount;
        
        // Claim any pending USDC rewards for beneficiary first (internal call to avoid access control)
        if (rewardToken.balanceOf(address(this)) > 0) {
            _claimRewardsInternal(); // ← Use internal function, not external claimRewards()
        }
        
        // Transfer unvested uTHOR back to owner (handle edge case where contract has less than expected)
        uint256 contractBalance = uTHOR.balanceOf(address(this));
        uint256 toWithdraw = unvestedAmount > contractBalance ? contractBalance : unvestedAmount;
        
        if (toWithdraw > 0) {
            require(uTHOR.transfer(owner(), toWithdraw), "xTHOR: uTHOR transfer failed");
        }
        
        // Disable further claiming and mark as revoked
        claimingEnabled = false;
        revoked = true;
        
        emit VestingRevoked(beneficiary, toWithdraw);
    }
    
    /**
     * @notice Owner can enable claiming
     */
    function enableClaiming() external onlyOwner {
        claimingEnabled = true;
        emit ClaimingEnabled();
    }
    
    /**
     * @notice Owner can deposit uTHOR tokens to this contract
     */
    function depositUTHOR(uint256 amount) external onlyOwner {
        require(uTHOR.transferFrom(msg.sender, address(this), amount), "xTHOR: uTHOR transfer failed");
    }
    
    /**
     * @notice Emergency function for owner to withdraw uTHOR tokens
     * @dev Tracks withdrawn amount to maintain accurate vesting calculations
     */
    function emergencyWithdrawUTHOR(uint256 amount) external onlyOwner {
        require(amount > 0, "xTHOR: Amount must be greater than 0");
        require(uTHOR.balanceOf(address(this)) >= amount, "xTHOR: Insufficient contract balance");

        emergencyWithdrawn += amount;
        require(uTHOR.transfer(owner(), amount), "xTHOR: uTHOR transfer failed");

        emit EmergencyWithdrawUTHOR(amount);
    }
    
    /**
     * @notice Emergency function for owner to withdraw USDC
     * @dev Withdraws USDC rewards from contract to owner
     */
    function emergencyWithdrawUSDC(uint256 amount) external onlyOwner {
        require(amount > 0, "xTHOR: Amount must be greater than 0");
        require(rewardToken.balanceOf(address(this)) >= amount, "xTHOR: Insufficient USDC balance");

        require(rewardToken.transfer(owner(), amount), "xTHOR: USDC transfer failed");

        emit EmergencyWithdrawUSDC(amount);
    }
    
    /**
     * @notice Get vesting schedule information
     */
    function getVestingInfo() external view returns (
        uint256 _totalAmount,
        uint256 _startTime,
        uint256 _cliffDuration,
        uint256 _vestingDuration,
        uint256 _released,
        uint256 _emergencyWithdrawn,
        bool _claimingEnabled,
        bool _revoked
    ) {
        return (
            totalAmount,
            startTime,
            cliffDuration,
            vestingDuration,
            released,
            emergencyWithdrawn,
            claimingEnabled,
            revoked
        );
    }
}
"
    }
  },
  "settings": {
    "viaIR": true,
    "optimizer": {
      "enabled": true,
      "runs": 200
    },
    "evmVersion": "paris",
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    }
  }
}}