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// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.25;

import {Ownable2Step} from "@openzeppelin/contracts/access/Ownable2Step.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {SafeCast} from "@openzeppelin/contracts/utils/math/SafeCast.sol";
import {IVotingEscrow} from "../interfaces/IVotingEscrow.sol";

/**
 * @title TRUF vesting contract
 * @author Ryuhei Matsuda
 * @notice Admin registers vesting information for users,
 *      and users could claim or lock vesting to veTRUF to get voting power and TRUF staking rewards
 */
contract TrufVesting is Ownable2Step {
    using SafeERC20 for IERC20;
    using SafeCast for uint256;
    using SafeCast for int256;

    error ZeroAddress();
    error ZeroAmount();
    error Forbidden(address sender);
    error InvalidTimestamp();
    error InvalidAmount();
    error VestingStarted(uint64 tge);
    error InvalidVestingCategory(uint256 id);
    error InvalidEmissions();
    error InvalidVestingInfo(uint256 categoryIdx, uint256 id);
    error InvalidUserVesting();
    error ClaimAmountExceed();
    error UserVestingAlreadySet(uint256 categoryIdx, uint256 vestingId, address user);
    error UserVestingDoesNotExists(uint256 categoryIdx, uint256 vestingId, address user);
    error MaxAllocationExceed();
    error AlreadyVested(uint256 categoryIdx, uint256 vestingId, address user);
    error LockExist();
    error LockDoesNotExist();
    error InvalidInitialReleasePct();
    error InvalidInitialReleasePeriod();
    error InvalidCliff();
    error InvalidPeriod();
    error InvalidUnit();
    error InvalidArray();
    error Initialized();

    /// @dev Emitted when vesting category is set
    event VestingCategorySet(uint256 indexed id, string category, uint256 maxAllocation, bool adminClaimable);

    /// @dev Emitted when emission schedule is set
    event EmissionScheduleSet(uint256 indexed categoryId, uint256[] emissions);

    /// @dev Emitted when vesting info is set
    event VestingInfoSet(uint256 indexed categoryId, uint256 indexed id, VestingInfo info);

    /// @dev Emitted when user vesting info is set
    event UserVestingSet(
        uint256 indexed categoryId, uint256 indexed vestingId, address indexed user, uint256 amount, uint64 startTime
    );

    /// @dev Emitted when admin migrates user's vesting to another address
    event MigrateUser(
        uint256 indexed categoryId, uint256 indexed vestingId, address prevUser, address newUser, uint256 newLockupId
    );

    /// @dev Emitted when admin cancel user's vesting
    event CancelVesting(
        uint256 indexed categoryId, uint256 indexed vestingId, address indexed user, bool giveUnclaimed
    );

    /// @dev Emitted when admin has been set
    event AdminSet(address indexed admin, bool indexed flag);

    /// @dev Emitted when user claimed vested TRUF tokens
    event Claimed(uint256 indexed categoryId, uint256 indexed vestingId, address indexed user, uint256 amount);

    /// @dev Emitted when veTRUF token has been set
    event VeTrufSet(address indexed veTRUF);

    /// @dev Emitted when user stakes vesting to veTRUF
    event Staked(
        uint256 indexed categoryId,
        uint256 indexed vestingId,
        address indexed user,
        uint256 amount,
        uint256 duration,
        uint256 lockupId
    );

    /// @dev Emitted when user extended veTRUF staking period or increased amount
    event ExtendedStaking(
        uint256 indexed categoryId, uint256 indexed vestingId, address indexed user, uint256 amount, uint256 duration
    );

    /// @dev Emitted when user unstakes from veTRUF
    event Unstaked(uint256 indexed categoryId, uint256 indexed vestingId, address indexed user, uint256 amount);

    /// @dev Vesting Category struct
    struct VestingCategory {
        string category; // Category name
        uint256 maxAllocation; // Maximum allocation for this category
        uint256 allocated; // Current allocated amount
        bool adminClaimable; // Allow admin to claim if value is true
        uint256 totalClaimed; // Total claimed amount
    }

    /// @dev Vesting info struct
    struct VestingInfo {
        uint64 initialReleasePct; // Initial Release percentage
        uint64 initialReleasePeriod; // Initial release period after TGE
        uint64 cliff; // Cliff period
        uint64 period; // Total period
        uint64 unit; // The period to claim. ex. monthly or 6 monthly
    }

    /// @dev User vesting info struct
    struct UserVesting {
        uint256 amount; // Total vesting amount
        uint256 claimed; // Total claimed amount
        uint256 locked; // Locked amount at VotingEscrow
        uint64 startTime; // Vesting start time
    }

    uint256 public constant DENOMINATOR = 1e18;
    uint64 public constant ONE_MONTH = 30 days;

    /// @dev Is category initialized
    mapping(uint256 => bool) public isInitialized;

    /// @dev TRUF token address
    IERC20 public immutable trufToken;

    /// @dev veTRUF token address
    IVotingEscrow public veTRUF;

    /// @dev TGE timestamp
    uint64 public immutable tgeTime;

    /// @dev Vesting categories
    VestingCategory[] public categories;

    // @dev Emission schedule per category. x index item of array indicates emission limit on x+1 months after TGE time.
    mapping(uint256 => uint256[]) public emissionSchedule;

    /// @dev Vesting info per category
    mapping(uint256 => VestingInfo[]) public vestingInfos;

    /// @dev User vesting information (category => info => user address => user vesting)
    mapping(uint256 => mapping(uint256 => mapping(address => UserVesting))) public userVestings;

    /// @dev Vesting lockup ids (category => info => user address => lockup id)
    mapping(uint256 => mapping(uint256 => mapping(address => uint256))) public lockupIds;

    /// @dev True if account has admin permission
    mapping(address => bool) public isAdmin;

    modifier onlyAdmin() {
        if (!isAdmin[msg.sender] && msg.sender != owner()) {
            revert Forbidden(msg.sender);
        }
        _;
    }

    /**
     * @notice TRUF Vesting constructor
     * @param _trufToken TRUF token address
     */
    constructor(IERC20 _trufToken, uint64 _tgeTime) {
        if (address(_trufToken) == address(0)) revert ZeroAddress();

        trufToken = _trufToken;

        if (_tgeTime < block.timestamp) {
            revert InvalidTimestamp();
        }
        tgeTime = _tgeTime;
    }

    /**
     * @notice Calculate claimable amount (total vested amount - previously claimed amount - locked amount)
     * @param categoryId Vesting category id
     * @param vestingId Vesting id
     * @param user user address
     * @return claimableAmount Claimable amount
     */
    function claimable(uint256 categoryId, uint256 vestingId, address user)
        public
        view
        returns (uint256 claimableAmount)
    {
        if (isInitialized[categoryId] == false) revert Initialized();

        UserVesting memory userVesting = userVestings[categoryId][vestingId][user];

        VestingInfo memory info = vestingInfos[categoryId][vestingId];

        uint64 startTime = userVesting.startTime + info.initialReleasePeriod;

        if (startTime > block.timestamp) {
            return 0;
        }

        uint256 totalAmount = userVesting.amount;

        uint256 initialRelease = (totalAmount * info.initialReleasePct) / DENOMINATOR;

        startTime += info.cliff;

        uint256 vestedAmount;

        if (startTime > block.timestamp) {
            vestedAmount = initialRelease;
        } else {
            uint64 timeElapsed = ((uint64(block.timestamp) - startTime) / info.unit) * info.unit;

            vestedAmount = ((totalAmount - initialRelease) * timeElapsed) / info.period + initialRelease;
        }

        uint256 maxClaimable = userVesting.amount - userVesting.locked;
        if (vestedAmount > maxClaimable) {
            vestedAmount = maxClaimable;
        }
        if (vestedAmount <= userVesting.claimed) {
            return 0;
        }

        claimableAmount = vestedAmount - userVesting.claimed;
        uint256 emissionLeft = getEmission(categoryId) - categories[categoryId].totalClaimed;

        if (claimableAmount > emissionLeft) {
            claimableAmount = emissionLeft;
        }
    }

    /**
     * @notice Claim available amount
     * @dev Owner is able to claim for admin claimable categories.
     * @param user user account(For non-admin claimable categories, it must be msg.sender)
     * @param categoryId category id
     * @param vestingId vesting id
     * @param claimAmount token amount to claim
     */
    function claim(address user, uint256 categoryId, uint256 vestingId, uint256 claimAmount) public {
        if (isInitialized[categoryId] == false) revert Initialized();

        if (user != msg.sender && (!categories[categoryId].adminClaimable || !isAdmin[msg.sender])) {
            revert Forbidden(msg.sender);
        }

        uint256 claimableAmount = claimable(categoryId, vestingId, user);
        if (claimAmount == type(uint256).max) {
            claimAmount = claimableAmount;
        } else if (claimAmount > claimableAmount) {
            revert ClaimAmountExceed();
        }
        if (claimAmount == 0) {
            revert ZeroAmount();
        }

        categories[categoryId].totalClaimed += claimAmount;
        userVestings[categoryId][vestingId][user].claimed += claimAmount;
        trufToken.safeTransfer(user, claimAmount);

        emit Claimed(categoryId, vestingId, user, claimAmount);
    }

    /**
     * @notice Stake vesting to veTRUF to get voting power and get staking TRUF rewards
     * @param categoryId category id
     * @param vestingId vesting id
     * @param amount amount to stake
     * @param duration lock period in seconds
     */
    function stake(uint256 categoryId, uint256 vestingId, uint256 amount, uint256 duration) external {
        if (isInitialized[categoryId] == false) revert Initialized();

        if (amount == 0) {
            revert ZeroAmount();
        }
        if (lockupIds[categoryId][vestingId][msg.sender] != 0) {
            revert LockExist();
        }

        UserVesting storage userVesting = userVestings[categoryId][vestingId][msg.sender];

        if (amount > userVesting.amount - userVesting.claimed - userVesting.locked) {
            revert InvalidAmount();
        }

        userVesting.locked += amount;

        trufToken.safeIncreaseAllowance(address(veTRUF), amount);
        uint256 lockupId = veTRUF.stakeVesting(amount, duration, msg.sender) + 1;
        lockupIds[categoryId][vestingId][msg.sender] = lockupId;

        emit Staked(categoryId, vestingId, msg.sender, amount, duration, lockupId);
    }

    /**
     * @notice Extend veTRUF staking period and increase amount
     * @param categoryId category id
     * @param vestingId vesting id
     * @param amount token amount to increase
     * @param duration lock period from now
     */
    function extendStaking(uint256 categoryId, uint256 vestingId, uint256 amount, uint256 duration) external {
        if (isInitialized[categoryId] == false) revert Initialized();

        uint256 lockupId = lockupIds[categoryId][vestingId][msg.sender];
        if (lockupId == 0) {
            revert LockDoesNotExist();
        }

        if (amount != 0) {
            UserVesting storage userVesting = userVestings[categoryId][vestingId][msg.sender];

            if (amount > userVesting.amount - userVesting.claimed - userVesting.locked) {
                revert InvalidAmount();
            }

            userVesting.locked += amount;

            trufToken.safeIncreaseAllowance(address(veTRUF), amount);
        }
        veTRUF.extendVestingLock(msg.sender, lockupId - 1, amount, duration);

        emit ExtendedStaking(categoryId, vestingId, msg.sender, amount, duration);
    }

    /**
     * @notice Unstake vesting from veTRUF
     * @param categoryId category id
     * @param vestingId vesting id
     */
    function unstake(uint256 categoryId, uint256 vestingId) external {
        if (isInitialized[categoryId] == false) revert Initialized();

        uint256 lockupId = lockupIds[categoryId][vestingId][msg.sender];
        if (lockupId == 0) {
            revert LockDoesNotExist();
        }

        uint256 amount = veTRUF.unstakeVesting(msg.sender, lockupId - 1, false);

        UserVesting storage userVesting = userVestings[categoryId][vestingId][msg.sender];

        userVesting.locked -= amount;
        delete lockupIds[categoryId][vestingId][msg.sender];

        emit Unstaked(categoryId, vestingId, msg.sender, amount);
    }

    /**
     * @notice Migrate owner of vesting. Used when user lost his private key
     * @dev Only admin can migrate users vesting
     * @param categoryId Category id
     * @param vestingId Vesting id
     * @param prevUser previous user address
     * @param newUser new user address
     */
    function migrateUser(uint256 categoryId, uint256 vestingId, address prevUser, address newUser) external onlyAdmin {
        if (newUser == address(0)) {
            revert ZeroAddress();
        }

        UserVesting storage prevVesting = userVestings[categoryId][vestingId][prevUser];
        UserVesting storage newVesting = userVestings[categoryId][vestingId][newUser];

        if (newVesting.amount != 0) {
            revert UserVestingAlreadySet(categoryId, vestingId, newUser);
        }
        if (prevVesting.amount == 0) {
            revert UserVestingDoesNotExists(categoryId, vestingId, prevUser);
        }

        newVesting.amount = prevVesting.amount;
        newVesting.claimed = prevVesting.claimed;
        newVesting.startTime = prevVesting.startTime;

        uint256 lockupId = lockupIds[categoryId][vestingId][prevUser];
        uint256 newLockupId;

        if (lockupId != 0) {
            newLockupId = veTRUF.migrateVestingLock(prevUser, newUser, lockupId - 1) + 1;
            lockupIds[categoryId][vestingId][newUser] = newLockupId;
            delete lockupIds[categoryId][vestingId][prevUser];

            newVesting.locked = prevVesting.locked;
        }
        delete userVestings[categoryId][vestingId][prevUser];

        emit MigrateUser(categoryId, vestingId, prevUser, newUser, newLockupId);
    }

    /**
     * @notice Cancel vesting and force cancel from voting escrow
     * @dev Only admin can cancel users vesting
     * @param categoryId Category id
     * @param vestingId Vesting id
     * @param user user address
     * @param giveUnclaimed Send currently vested, but unclaimed amount to use or not
     */
    function cancelVesting(uint256 categoryId, uint256 vestingId, address user, bool giveUnclaimed)
        external
        onlyAdmin
    {
        UserVesting storage userVesting = userVestings[categoryId][vestingId][user];

        if (userVesting.amount == 0) {
            revert UserVestingDoesNotExists(categoryId, vestingId, user);
        }

        VestingInfo memory vestingInfo = vestingInfos[categoryId][vestingId];
        if (
            userVesting.startTime + vestingInfo.initialReleasePeriod + vestingInfo.cliff + vestingInfo.period
                <= block.timestamp
        ) {
            revert AlreadyVested(categoryId, vestingId, user);
        }

        uint256 lockupId = lockupIds[categoryId][vestingId][user];

        if (lockupId != 0) {
            veTRUF.unstakeVesting(user, lockupId - 1, true);
            delete lockupIds[categoryId][vestingId][user];
            userVesting.locked = 0;
        }

        VestingCategory storage category = categories[categoryId];

        uint256 claimableAmount = claimable(categoryId, vestingId, user);

        uint256 unvested = userVesting.amount - (userVesting.claimed + (giveUnclaimed ? claimableAmount : 0));

        delete userVestings[categoryId][vestingId][user];

        category.allocated -= unvested;

        if (giveUnclaimed && claimableAmount != 0) {
            trufToken.safeTransfer(user, claimableAmount);

            category.totalClaimed += claimableAmount;
            emit Claimed(categoryId, vestingId, user, claimableAmount);
        }

        emit CancelVesting(categoryId, vestingId, user, giveUnclaimed);
    }

    /**
     * @notice Add or modify vesting category
     * @dev Only admin can set vesting category
     * @param id id to modify or uint256.max to add new category
     * @param category new vesting category
     * @param maxAllocation Max allocation amount for this category
     * @param adminClaimable Admin claimable flag
     */
    function setVestingCategory(uint256 id, string calldata category, uint256 maxAllocation, bool adminClaimable)
        public
        onlyOwner
    {
        if (id != type(uint256).max && isInitialized[id]) {
            revert Initialized();
        }

        if (maxAllocation == 0) {
            revert ZeroAmount();
        }

        int256 tokenMove;
        if (id == type(uint256).max) {
            if (block.timestamp >= tgeTime) {
                revert VestingStarted(tgeTime);
            }
            id = categories.length;
            categories.push(VestingCategory(category, maxAllocation, 0, adminClaimable, 0));
            tokenMove = maxAllocation.toInt256();
        } else {
            if (categories[id].allocated > maxAllocation) {
                revert MaxAllocationExceed();
            }
            tokenMove = maxAllocation.toInt256() - categories[id].maxAllocation.toInt256();
            categories[id].maxAllocation = maxAllocation;
            categories[id].category = category;
            categories[id].adminClaimable = adminClaimable;
        }

        emit VestingCategorySet(id, category, maxAllocation, adminClaimable);
    }

    /**
     * @notice Set emission schedule
     * @dev Only admin can set emission schedule
     * @param categoryId category id
     * @param emissions Emission schedule
     */
    function setEmissionSchedule(uint256 categoryId, uint256[] memory emissions) public onlyOwner {
        if (block.timestamp >= tgeTime) {
            revert VestingStarted(tgeTime);
        }

        uint256 maxAllocation = categories[categoryId].maxAllocation;

        if (emissions.length == 0 || emissions[emissions.length - 1] != maxAllocation) {
            revert InvalidEmissions();
        }

        delete emissionSchedule[categoryId];
        emissionSchedule[categoryId] = emissions;

        emit EmissionScheduleSet(categoryId, emissions);
    }

    /**
     * @notice Add or modify vesting information
     * @dev Only admin can set vesting info
     * @param categoryIdx category id
     * @param id id to modify or uint256.max to add new info
     * @param info new vesting info
     */
    function setVestingInfo(uint256 categoryIdx, uint256 id, VestingInfo calldata info) public onlyAdmin {
        if (info.initialReleasePct > DENOMINATOR) {
            revert InvalidInitialReleasePct();
        } else if (info.initialReleasePeriod > info.period) {
            revert InvalidInitialReleasePeriod();
        } else if (info.cliff > 365 days) {
            revert InvalidCliff();
        } else if (info.period > 8 * 365 days) {
            revert InvalidPeriod();
        } else if (info.period % info.unit != 0) {
            revert InvalidUnit();
        }
        if (id == type(uint256).max) {
            id = vestingInfos[categoryIdx].length;
            vestingInfos[categoryIdx].push(info);
        } else {
            vestingInfos[categoryIdx][id] = info;
        }

        emit VestingInfoSet(categoryIdx, id, info);
    }

    /**
     * @notice Set user vesting amount
     * @dev Only admin can set user vesting
     * @dev It will be failed if it exceeds max allocation
     * @param categoryId category id
     * @param vestingId vesting id
     * @param user user address
     * @param startTime zero to start from TGE or non-zero to set up custom start time
     * @param amount vesting amount
     */
    function setUserVesting(uint256 categoryId, uint256 vestingId, address user, uint64 startTime, uint256 amount)
        public
        onlyAdmin
    {
        if (user == address(0)) {
            revert ZeroAddress();
        }
        if (amount == 0) {
            revert ZeroAmount();
        }
        if (categoryId >= categories.length) {
            revert InvalidVestingCategory(categoryId);
        }
        if (vestingId >= vestingInfos[categoryId].length) {
            revert InvalidVestingInfo(categoryId, vestingId);
        }

        VestingCategory storage category = categories[categoryId];
        UserVesting storage userVesting = userVestings[categoryId][vestingId][user];

        category.allocated += amount;
        category.allocated -= userVesting.amount;
        if (category.allocated > category.maxAllocation) {
            revert MaxAllocationExceed();
        }

        if (amount < userVesting.claimed + userVesting.locked) {
            revert InvalidUserVesting();
        }
        if (startTime != 0 && startTime < tgeTime) revert InvalidTimestamp();

        userVesting.amount = amount;
        userVesting.startTime = startTime == 0 ? tgeTime : startTime;

        emit UserVestingSet(categoryId, vestingId, user, amount, userVesting.startTime);
    }

    /**
     * @notice Set multiple user vestings
     * @dev Only admin can set user vestings
     * @dev It will fail if it exceeds max allocation
     * @param categoryId category id
     * @param vestingId vesting id
     * @param users users address
     * @param amounts vesting amounts
     */
    function setUsersVestings(uint256 categoryId, uint256 vestingId, address[] memory users, uint256[] memory amounts)
        public
        onlyAdmin
    {
        if (users.length != amounts.length) {
            revert InvalidArray();
        }

        for (uint256 i = 0; i < users.length; i++) {
            setUserVesting(categoryId, vestingId, users[i], 0, amounts[i]);
        }
    }

    /**
     * @notice Set veTRUF token
     * @dev Only admin can set veTRUF
     * @param _veTRUF veTRUF token address
     */
    function setVeTruf(address _veTRUF) external onlyOwner {
        if (_veTRUF == address(0)) {
            revert ZeroAddress();
        }
        veTRUF = IVotingEscrow(_veTRUF);

        emit VeTrufSet(_veTRUF);
    }

    /**
     * @notice Set admin
     * @dev Only owner can set
     * @param _admin admin address
     * @param _flag true to set, false to remove
     */
    function setAdmin(address _admin, bool _flag) external onlyOwner {
        isAdmin[_admin] = _flag;

        emit AdminSet(_admin, _flag);
    }

    /**
     * @notice Initialize category by transferring TRUF tokens
     * @param _categoryId category to initialize
     */
    function initialize(uint256 _categoryId) external {
        if (isInitialized[_categoryId]) {
            revert Initialized();
        }

        isInitialized[_categoryId] = true;

        trufToken.safeTransferFrom(msg.sender, address(this), categories[_categoryId].maxAllocation);
    }

    /**
     * @notice Multicall several functions in single transaction
     * @dev Could be for setting vesting categories, vesting info, and user vesting in single transaction at once
     * @param payloads list of payloads
     */
    function multicall(bytes[] calldata payloads) external {
        uint256 len = payloads.length;
        for (uint256 i; i < len;) {
            (bool success, bytes memory result) = address(this).delegatecall(payloads[i]);
            if (!success) {
                if (result.length < 68) revert();
                assembly {
                    result := add(result, 0x04)
                }
                revert(abi.decode(result, (string)));
            }

            unchecked {
                i += 1;
            }
        }
    }

    /**
     * @return emissions returns emission schedule of category
     */
    function getEmissionSchedule(uint256 categoryId) external view returns (uint256[] memory emissions) {
        emissions = emissionSchedule[categoryId];
    }

    /**
     * @return emissionLimit returns current emission limit of category
     */
    function getEmission(uint256 categoryId) public view returns (uint256 emissionLimit) {
        uint64 _tgeTime = tgeTime;

        if (block.timestamp >= _tgeTime) {
            uint256 maxAllocation = categories[categoryId].maxAllocation;

            if (emissionSchedule[categoryId].length == 0) {
                return maxAllocation;
            }
            uint64 elapsedTime = uint64(block.timestamp) - _tgeTime + ONE_MONTH;
            uint64 elapsedMonth = elapsedTime / ONE_MONTH;

            if (elapsedMonth >= emissionSchedule[categoryId].length) {
                return maxAllocation;
            }

            uint256 lastMonthEmission = elapsedMonth == 0 ? 0 : emissionSchedule[categoryId][elapsedMonth - 1];
            uint256 thisMonthEmission = emissionSchedule[categoryId][elapsedMonth];

            uint64 elapsedTimeOfLastMonth = elapsedTime % ONE_MONTH;
            emissionLimit =
                (thisMonthEmission - lastMonthEmission) * elapsedTimeOfLastMonth / ONE_MONTH + lastMonthEmission;
            if (emissionLimit > maxAllocation) {
                emissionLimit = maxAllocation;
            }
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol)

pragma solidity ^0.8.0;

import "./Ownable.sol";

/**
 * @dev Contract module which provides 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} and {acceptOwnership}.
 *
 * This module is used through inheritance. It will make available all functions
 * from parent (Ownable).
 */
abstract contract Ownable2Step is Ownable {
    address private _pendingOwner;

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

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

    /**
     * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual override onlyOwner {
        _pendingOwner = newOwner;
        emit OwnershipTransferStarted(owner(), newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual override {
        delete _pendingOwner;
        super._transferOwnership(newOwner);
    }

    /**
     * @dev The new owner accepts the ownership transfer.
     */
    function acceptOwnership() public virtual {
        address sender = _msgSender();
        require(pendingOwner() == sender, "Ownable2Step: caller is not the new owner");
        _transferOwnership(sender);
    }
}

// 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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/IERC20Permit.sol";
import "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
     * Revert on invalid signature.
     */
    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

        (bool success, bytes memory returndata) = address(token).call(data);
        return
            success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)
// This file was procedurally generated from scripts/generate/templates/SafeCast.js.

pragma solidity ^0.8.0;

/**
 * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
 * checks.
 *
 * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
 * easily result in undesired exploitation or bugs, since developers usually
 * assume that overflows raise errors. `SafeCast` restores this intuition by
 * reverting the transaction when such an operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 *
 * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing
 * all math on `uint256` and `int256` and then downcasting.
 */
library SafeCast {
    /**
     * @dev Returns the downcasted uint248 from uint256, reverting on
     * overflow (when the input is greater than largest uint248).
     *
     * Counterpart to Solidity's `uint248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     *
     * _Available since v4.7._
     */
    function toUint248(uint256 value) internal pure returns (uint248) {
        require(value <= type(uint248).max, "SafeCast: value doesn't fit in 248 bits");
        return uint248(value);
    }

    /**
     * @dev Returns the downcasted uint240 from uint256, reverting on
     * overflow (when the input is greater than largest uint240).
     *
     * Counterpart to Solidity's `uint240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     *
     * _Available since v4.7._
     */
    function toUint240(uint256 value) internal pure returns (uint240) {
        require(value <= type(uint240).max, "SafeCast: value doesn't fit in 240 bits");
        return uint240(value);
    }

    /**
     * @dev Returns the downcasted uint232 from uint256, reverting on
     * overflow (when the input is greater than largest uint232).
     *
     * Counterpart to Solidity's `uint232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     *
     * _Available since v4.7._
     */
    function toUint232(uint256 value) internal pure returns (uint232) {
        require(value <= type(uint232).max, "SafeCast: value doesn't fit in 232 bits");
        return uint232(value);
    }

    /**
     * @dev Returns the downcasted uint224 from uint256, reverting on
     * overflow (when the input is greater than largest uint224).
     *
     * Counterpart to Solidity's `uint224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     *
     * _Available since v4.2._
     */
    function toUint224(uint256 value) internal pure returns (uint224) {
        require(value <= type(uint224).max, "SafeCast: value doesn't fit in 224 bits");
        return uint224(value);
    }

    /**
     * @dev Returns the downcasted uint216 from uint256, reverting on
     * overflow (when the input is greater than largest uint216).
     *
     * Counterpart to Solidity's `uint216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     *
     * _Available since v4.7._
     */
    function toUint216(uint256 value) internal pure returns (uint216) {
        require(value <= type(uint216).max, "SafeCast: value doesn't fit in 216 bits");
        return uint216(value);
    }

    /**
     * @dev Returns the downcasted uint208 from uint256, reverting on
     * overflow (when the input is greater than largest uint208).
     *
     * Counterpart to Solidity's `uint208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     *
     * _Available since v4.7._
     */
    function toUint208(uint256 value) internal pure returns (uint208) {
        require(value <= type(uint208).max, "SafeCast: value doesn't fit in 208 bits");
        return uint208(value);
    }

    /**
     * @dev Returns the downcasted uint200 from uint256, reverting on
     * overflow (when the input is greater than largest uint200).
     *
     * Counterpart to Solidity's `uint200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     *
     * _Available since v4.7._
     */
    function toUint200(uint256 value) internal pure returns (uint200) {
        require(value <= type(uint200).max, "SafeCast: value doesn't fit in 200 bits");
        return uint200(value);
    }

    /**
     * @dev Returns the downcasted uint192 from uint256, reverting on
     * overflow (when the input is greater than largest uint192).
     *
     * Counterpart to Solidity's `uint192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     *
     * _Available since v4.7._
     */
    function toUint192(uint256 value) internal pure returns (uint192) {
        require(value <= type(uint192).max, "SafeCast: value doesn't fit in 192 bits");
        return uint192(value);
    }

    /**
     * @dev Returns the downcasted uint184 from uint256, reverting on
     * overflow (when the input is greater than largest uint184).
     *
     * Counterpart to Solidity's `uint184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     *
     * _Available since v4.7._
     */
    function toUint184(uint256 value) internal pure returns (uint184) {
        require(value <= type(uint184).max, "SafeCast: value doesn't fit in 184 bits");
        return uint184(value);
    }

    /**
     * @dev Returns the downcasted uint176 from uint256, reverting on
     * overflow (when the input is greater than largest uint176).
     *
     * Counterpart to Solidity's `uint176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     *
     * _Available since v4.7._
     */
    function toUint176(uint256 value) internal pure returns (uint176) {
        require(value <= type(uint176).max, "SafeCast: value doesn't fit in 176 bits");
        return uint176(value);
    }

    /**
     * @dev Returns the downcasted uint168 from uint256, reverting on
     * overflow (when the input is greater than largest uint168).
     *
     * Counterpart to Solidity's `uint168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     *
     * _Available since v4.7._
     */
    function toUint168(uint256 value) internal pure returns (uint168) {
        require(value <= type(uint168).max, "SafeCast: value doesn't fit in 168 bits");
        return uint168(value);
    }

    /**
     * @dev Returns the downcasted uint160 from uint256, reverting on
     * overflow (when the input is greater than largest uint160).
     *
     * Counterpart to Solidity's `uint160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     *
     * _Available since v4.7._
     */
    function toUint160(uint256 value) internal pure returns (uint160) {
        require(value <= type(uint160).max, "SafeCast: value doesn't fit in 160 bits");
        return uint160(value);
    }

    /**
     * @dev Returns the downcasted uint152 from uint256, reverting on
     * overflow (when the input is greater than largest uint152).
     *
     * Counterpart to Solidity's `uint152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     *
     * _Available since v4.7._
     */
    function toUint152(uint256 value) internal pure returns (uint152) {
        require(value <= type(uint152).max, "SafeCast: value doesn't fit in 152 bits");
        return uint152(value);
    }

    /**
     * @dev Returns the downcasted uint144 from uint256, reverting on
     * overflow (when the input is greater than largest uint144).
     *
     * Counterpart to Solidity's `uint144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     *
     * _Available since v4.7._
     */
    function toUint144(uint256 value) internal pure returns (uint144) {
        require(value <= type(uint144).max, "SafeCast: value doesn't fit in 144 bits");
        return uint144(value);
    }

    /**
     * @dev Returns the downcasted uint136 from uint256, reverting on
     * overflow (when the input is greater than largest uint136).
     *
     * Counterpart to Solidity's `uint136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     *
     * _Available since v4.7._
     */
    function toUint136(uint256 value) internal pure returns (uint136) {
        require(value <= type(uint136).max, "SafeCast: value doesn't fit in 136 bits");
        return uint136(value);
    }

    /**
     * @dev Returns the downcasted uint128 from uint256, reverting on
     * overflow (when the input is greater than largest uint128).
     *
     * Counterpart to Solidity's `uint128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v2.5._
     */
    function toUint128(uint256 value) internal pure returns (uint128) {
        require(value <= type(uint128).max, "SafeCast: value doesn't fit in 128 bits");
        return uint128(value);
    }

    /**
     * @dev Returns the downcasted uint120 from uint256, reverting on
     * overflow (when the input is greater than largest uint120).
     *
     * Counterpart to Solidity's `uint120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     *
     * _Available since v4.7._
     */
    function toUint120(uint256 value) internal pure returns (uint120) {
        require(value <= type(uint120).max, "SafeCast: value doesn't fit in 120 bits");
        return uint120(value);
    }

    /**
     * @dev Returns the downcasted uint112 from uint256, reverting on
     * overflow (when the input is greater than largest uint112).
     *
     * Counterpart to Solidity's `uint112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     *
     * _Available since v4.7._
     */
    function toUint112(uint256 value) internal pure returns (uint112) {
        require(value <= type(uint112).max, "SafeCast: value doesn't fit in 112 bits");
        return uint112(value);
    }

    /**
     * @dev Returns the downcasted uint104 from uint256, reverting on
     * overflow (when the input is greater than largest uint104).
     *
     * Counterpart to Solidity's `uint104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     *
     * _Available since v4.7._
     */
    function toUint104(uint256 value) internal pure returns (uint104) {
        require(value <= type(uint104).max, "SafeCast: value doesn't fit in 104 bits");
        return uint104(value);
    }

    /**
     * @dev Returns the downcasted uint96 from uint256, reverting on
     * overflow (when the input is greater than largest uint96).
     *
     * Counterpart to Solidity's `uint96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     *
     * _Available since v4.2._
     */
    function toUint96(uint256 value) internal pure returns (uint96) {
        require(value <= type(uint96).max, "SafeCast: value doesn't fit in 96 bits");
        return uint96(value);
    }

    /**
     * @dev Returns the downcasted uint88 from uint256, reverting on
     * overflow (when the input is greater than largest uint88).
     *
     * Counterpart to Solidity's `uint88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     *
     * _Available since v4.7._
     */
    function toUint88(uint256 value) internal pure returns (uint88) {
        require(value <= type(uint88).max, "SafeCast: value doesn't fit in 88 bits");
        return uint88(value);
    }

    /**
     * @dev Returns the downcasted uint80 from uint256, reverting on
     * overflow (when the input is greater than largest uint80).
     *
     * Counterpart to Solidity's `uint80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     *
     * _Available since v4.7._
     */
    function toUint80(uint256 value) internal pure returns (uint80) {
        require(value <= type(uint80).max, "SafeCast: value doesn't fit in 80 bits");
        return uint80(value);
    }

    /**
     * @dev Returns the downcasted uint72 from uint256, reverting on
     * overflow (when the input is greater than largest uint72).
     *
     * Counterpart to Solidity's `uint72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     *
     * _Available since v4.7._
     */
    function toUint72(uint256 value) internal pure returns (uint72) {
        require(value <= type(uint72).max, "SafeCast: value doesn't fit in 72 bits");
        return uint72(value);
    }

    /**
     * @dev Returns the downcasted uint64 from uint256, reverting on
     * overflow (when the input is greater than largest uint64).
     *
     * Counterpart to Solidity's `uint64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v2.5._
     */
    function toUint64(uint256 value) internal pure returns (uint64) {
        require(value <= type(uint64).max, "SafeCast: value doesn't fit in 64 bits");
        return uint64(value);
    }

    /**
     * @dev Returns the downcasted uint56 from uint256, reverting on
     * overflow (when the input is greater than largest uint56).
     *
     * Counterpart to Solidity's `uint56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     *
     * _Available since v4.7._
     */
    function toUint56(uint256 value) internal pure returns (uint56) {
        require(value <= type(uint56).max, "SafeCast: value doesn't fit in 56 bits");
        return uint56(value);
    }

    /**
     * @dev Returns the downcasted uint48 from uint256, reverting on
     * overflow (when the input is greater than largest uint48).
     *
     * Counterpart to Solidity's `uint48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     *
     * _Available since v4.7._
     */
    function toUint48(uint256 value) internal pure returns (uint48) {
        require(value <= type(uint48).max, "SafeCast: value doesn't fit in 48 bits");
        return uint48(value);
    }

    /**
     * @dev Returns the downcasted uint40 from uint256, reverting on
     * overflow (when the input is greater than largest uint40).
     *
     * Counterpart to Solidity's `uint40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     *
     * _Available since v4.7._
     */
    function toUint40(uint256 value) internal pure returns (uint40) {
        require(value <= type(uint40).max, "SafeCast: value doesn't fit in 40 bits");
        return uint40(value);
    }

    /**
     * @dev Returns the downcasted uint32 from uint256, reverting on
     * overflow (when the input is greater than largest uint32).
     *
     * Counterpart to Solidity's `uint32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v2.5._
     */
    function toUint32(uint256 value) internal pure returns (uint32) {
        require(value <= type(uint32).max, "SafeCast: value doesn't fit in 32 bits");
        return uint32(value);
    }

    /**
     * @dev Returns the downcasted uint24 from uint256, reverting on
     * overflow (when the input is greater than largest uint24).
     *
     * Counterpart to Solidity's `uint24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     *
     * _Available since v4.7._
     */
    function toUint24(uint256 value) internal pure returns (uint24) {
        require(value <= type(uint24).max, "SafeCast: value doesn't fit in 24 bits");
        return uint24(value);
    }

    /**
     * @dev Returns the downcasted uint16 from uint256, reverting on
     * overflow (when the input is greater than largest uint16).
     *
     * Counterpart to Solidity's `uint16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v2.5._
     */
    function toUint16(uint256 value) internal pure returns (uint16) {
        require(value <= type(uint16).max, "SafeCast: value doesn't fit in 16 bits");
        return uint16(value);
    }

    /**
     * @dev Returns the downcasted uint8 from uint256, reverting on
     * overflow (when the input is greater than largest uint8).
     *
     * Counterpart to Solidity's `uint8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     *
     * _Available since v2.5._
     */
    function toUint8(uint256 value) internal pure returns (uint8) {
        require(value <= type(uint8).max, "SafeCast: value doesn't fit in 8 bits");
        return uint8(value);
    }

    /**
     * @dev Converts a signed int256 into an unsigned uint256.
     *
     * Requirements:
     *
     * - input must be greater than or equal to 0.
     *
     * _Available since v3.0._
     */
    function toUint256(int256 value) internal pure returns (uint256) {
        require(value >= 0, "SafeCast: value must be positive");
        return uint256(value);
    }

    /**
     * @dev Returns the downcasted int248 from int256, reverting on
     * overflow (when the input is less than smallest int248 or
     * greater than largest int248).
     *
     * Counterpart to Solidity's `int248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     *
     * _Available since v4.7._
     */
    function toInt248(int256 value) internal pure returns (int248 downcasted) {
        downcasted = int248(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 248 bits");
    }

    /**
     * @dev Returns the downcasted int240 from int256, reverting on
     * overflow (when the input is less than smallest int240 or
     * greater than largest int240).
     *
     * Counterpart to Solidity's `int240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     *
     * _Available since v4.7._
     */
    function toInt240(int256 value) internal pure returns (int240 downcasted) {
        downcasted = int240(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 240 bits");
    }

    /**
     * @dev Returns the downcasted int232 from int256, reverting on
     * overflow (when the input is less than smallest int232 or
     * greater than largest int232).
     *
     * Counterpart to Solidity's `int232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     *
     * _Available since v4.7._
     */
    function toInt232(int256 value) internal pure returns (int232 downcasted) {
        downcasted = int232(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 232 bits");
    }

    /**
     * @dev Returns the downcasted int224 from int256, reverting on
     * overflow (when the input is less than smallest int224 or
     * greater than largest int224).
     *
     * Counterpart to Solidity's `int224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     *
     * _Available since v4.7._
     */
    function toInt224(int256 value) internal pure returns (int224 downcasted) {
        downcasted = int224(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 224 bits");
    }

    /**
     * @dev Returns the downcasted int216 from int256, reverting on
     * overflow (when the input is less than smallest int216 or
     * greater than largest int216).
     *
     * Counterpart to Solidity's `int216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     *
     * _Available since v4.7._
     */
    function toInt216(int256 value) internal pure returns (int216 downcasted) {
        downcasted = int216(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 216 bits");
    }

    /**
     * @dev Returns the downcasted int208 from int256, reverting on
     * overflow (when the input is less than smallest int208 or
     * greater than largest int208).
     *
     * Counterpart to Solidity's `int208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     *
     * _Available since v4.7._
     */
    function toInt208(int256 value) internal pure returns (int208 downcasted) {
        downcasted = int208(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 208 bits");
    }

    /**
     * @dev Returns the downcasted int200 from int256, reverting on
     * overflow (when the input is less than smallest int200 or
     * greater than largest int200).
     *
     * Counterpart to Solidity's `int200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     *
     * _Available since v4.7._
     */
    function toInt200(int256 value) internal pure returns (int200 downcasted) {
        downcasted = int200(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 200 bits");
    }

    /**
     * @dev Returns the downcasted int192 from int256, reverting on
     * overflow (when the input is less than smallest int192 or
     * greater than largest int192).
     *
     * Counterpart to Solidity's `int192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     *
     * _Available since v4.7._
     */
    function toInt192(int256 value) internal pure returns (int192 downcasted) {
        downcasted = int192(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 192 bits");
    }

    /**
     * @dev Returns the downcasted int184 from int256, reverting on
     * overflow (when the input is less than smallest int184 or
     * greater than largest int184).
     *
     * Counterpart to Solidity's `int184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     *
     * _Available since v4.7._
     */
    function toInt184(int256 value) internal pure returns (int184 downcasted) {
        downcasted = int184(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 184 bits");
    }

    /**
     * @dev Returns the downcasted int176 from int256, reverting on
     * overflow (when the input is less than smallest int176 or
     * greater than largest int176).
     *
     * Counterpart to Solidity's `int176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     *
     * _Available since v4.7._
     */
    function toInt176(int256 value) internal pure returns (int176 downcasted) {
        downcasted = int176(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 176 bits");
    }

    /**
     * @dev Returns the downcasted int168 from int256, reverting on
     * overflow (when the input is less than smallest int168 or
     * greater than largest int168).
     *
     * Counterpart to Solidity's `int168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     *
     * _Available since v4.7._
     */
    function toInt168(int256 value) internal pure returns (int168 downcasted) {
        downcasted = int168(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 168 bits");
    }

    /**
     * @dev Returns the downcasted int160 from int256, reverting on
     * overflow (when the input is less than smallest int160 or
     * greater than largest int160).
     *
     * Counterpart to Solidity's `int160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     *
     * _Available since v4.7._
     */
    function toInt160(int256 value) internal pure returns (int160 downcasted) {
        downcasted = int160(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 160 bits");
    }

    /**
     * @dev Returns the downcasted int152 from int256, reverting on
     * overflow (when the input is less than smallest int152 or
     * greater than largest int152).
     *
     * Counterpart to Solidity's `int152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     *
     * _Available since v4.7._
     */
    function toInt152(int256 value) internal pure returns (int152 downcasted) {
        downcasted = int152(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 152 bits");
    }

    /**
     * @dev Returns the downcasted int144 from int256, reverting on
     * overflow (when the input is less than smallest int144 or
     * greater than largest int144).
     *
     * Counterpart to Solidity's `int144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     *
     * _Available since v4.7._
     */
    function toInt144(int256 value) internal pure returns (int144 downcasted) {
        downcasted = int144(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 144 bits");
    }

    /**
     * @dev Returns the downcasted int136 from int256, reverting on
     * overflow (when the input is less than smallest int136 or
     * greater than largest int136).
     *
     * Counterpart to Solidity's `int136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     *
     * _Available since v4.7._
     */
    function toInt136(int256 value) internal pure returns (int136 downcasted) {
        downcasted = int136(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 136 bits");
    }

    /**
     * @dev Returns the downcasted int128 from int256, reverting on
     * overflow (when the input is less than smallest int128 or
     * greater than largest int128).
     *
     * Counterpart to Solidity's `int128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v3.1._
     */
    function toInt128(int256 value) internal pure returns (int128 downcasted) {
        downcasted = int128(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 128 bits");
    }

    /**
     * @dev Returns the downcasted int120 from int256, reverting on
     * overflow (when the input is less than smallest int120 or
     * greater than largest int120).
     *
     * Counterpart to Solidity's `int120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     *
     * _Available since v4.7._
     */
    function toInt120(int256 value) internal pure returns (int120 downcasted) {
        downcasted = int120(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 120 bits");
    }

    /**
     * @dev Returns the downcasted int112 from int256, reverting on
     * overflow (when the input is less than smallest int112 or
     * greater than largest int112).
     *
     * Counterpart to Solidity's `int112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     *
     * _Available since v4.7._
     */
    function toInt112(int256 value) internal pure returns (int112 downcasted) {
        downcasted = int112(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 112 bits");
    }

    /**
     * @dev Returns the downcasted int104 from int256, reverting on
     * overflow (when the input is less than smallest int104 or
     * greater than largest int104).
     *
     * Counterpart to Solidity's `int104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     *
     * _Available since v4.7._
     */
    function toInt104(int256 value) internal pure returns (int104 downcasted) {
        downcasted = int104(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 104 bits");
    }

    /**
     * @dev Returns the downcasted int96 from int256, reverting on
     * overflow (when the input is less than smallest int96 or
     * greater than largest int96).
     *
     * Counterpart to Solidity's `int96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     *
     * _Available since v4.7._
     */
    function toInt96(int256 value) internal pure returns (int96 downcasted) {
        downcasted = int96(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 96 bits");
    }

    /**
     * @dev Returns the downcasted int88 from int256, reverting on
     * overflow (when the input is less than smallest int88 or
     * greater than largest int88).
     *
     * Counterpart to Solidity's `int88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     *
     * _Available since v4.7._
     */
    function toInt88(int256 value) internal pure returns (int88 downcasted) {
        downcasted = int88(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 88 bits");
    }

    /**
     * @dev Returns the downcasted int80 from int256, reverting on
     * overflow (when the input is less than smallest int80 or
     * greater than largest int80).
     *
     * Counterpart to Solidity's `int80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     *
     * _Available since v4.7._
     */
    function toInt80(int256 value) internal pure returns (int80 downcasted) {
        downcasted = int80(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 80 bits");
    }

    /**
     * @dev Returns the downcasted int72 from int256, reverting on
     * overflow (when the input is less than smallest int72 or
     * greater than largest int72).
     *
     * Counterpart to Solidity's `int72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     *
     * _Available since v4.7._
     */
    function toInt72(int256 value) internal pure returns (int72 downcasted) {
        downcasted = int72(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 72 bits");
    }

    /**
     * @dev Returns the downcasted int64 from int256, reverting on
     * overflow (when the input is less than smallest int64 or
     * greater than largest int64).
     *
     * Counterpart to Solidity's `int64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v3.1._
     */
    function toInt64(int256 value) internal pure returns (int64 downcasted) {
        downcasted = int64(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 64 bits");
    }

    /**
     * @dev Returns the downcasted int56 from int256, reverting on
     * overflow (when the input is less than smallest int56 or
     * greater than largest int56).
     *
     * Counterpart to Solidity's `int56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     *
     * _Available since v4.7._
     */
    function toInt56(int256 value) internal pure returns (int56 downcasted) {
        downcasted = int56(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 56 bits");
    }

    /**
     * @dev Returns the downcasted int48 from int256, reverting on
     * overflow (when the input is less than smallest int48 or
     * greater than largest int48).
     *
     * Counterpart to Solidity's `int48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     *
     * _Available since v4.7._
     */
    function toInt48(int256 value) internal pure returns (int48 downcasted) {
        downcasted = int48(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 48 bits");
    }

    /**
     * @dev Returns the downcasted int40 from int256, reverting on
     * overflow (when the input is less than smallest int40 or
     * greater than largest int40).
     *
     * Counterpart to Solidity's `int40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     *
     * _Available since v4.7._
     */
    function toInt40(int256 value) internal pure returns (int40 downcasted) {
        downcasted = int40(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 40 bits");
    }

    /**
     * @dev Returns the downcasted int32 from int256, reverting on
     * overflow (when the input is less than smallest int32 or
     * greater than largest int32).
     *
     * Counterpart to Solidity's `int32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v3.1._
     */
    function toInt32(int256 value) internal pure returns (int32 downcasted) {
        downcasted = int32(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 32 bits");
    }

    /**
     * @dev Returns the downcasted int24 from int256, reverting on
     * overflow (when the input is less than smallest int24 or
     * greater than largest int24).
     *
     * Counterpart to Solidity's `int24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     *
     * _Available since v4.7._
     */
    function toInt24(int256 value) internal pure returns (int24 downcasted) {
        downcasted = int24(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 24 bits");
    }

    /**
     * @dev Returns the downcasted int16 from int256, reverting on
     * overflow (when the input is less than smallest int16 or
     * greater than largest int16).
     *
     * Counterpart to Solidity's `int16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v3.1._
     */
    function toInt16(int256 value) internal pure returns (int16 downcasted) {
        downcasted = int16(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 16 bits");
    }

    /**
     * @dev Returns the downcasted int8 from int256, reverting on
     * overflow (when the input is less than smallest int8 or
     * greater than largest int8).
     *
     * Counterpart to Solidity's `int8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     *
     * _Available since v3.1._
     */
    function toInt8(int256 value) internal pure returns (int8 downcasted) {
        downcasted = int8(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 8 bits");
    }

    /**
     * @dev Converts an unsigned uint256 into a signed int256.
     *
     * Requirements:
     *
     * - input must be less than or equal to maxInt256.
     *
     * _Available since v3.0._
     */
    function toInt256(uint256 value) internal pure returns (int256) {
        // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
        require(value <= uint256(type(int256).max), "SafeCast: value doesn't fit in an int256");
        return int256(value);
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.25;

interface IVotingEscrow {
    /// @dev Lockup struct
    struct Lockup {
        uint128 amount; // Locked amount
        uint128 duration; // Lock duration in seconds
        uint128 end; // Lock end timestamp in seconds
        uint256 points; // veTRUF points
        bool isVesting; // True if locked from vesting
    }

    function stakeVesting(uint256 amount, uint256 duration, address to) external returns (uint256 lockupId);

    function unstakeVesting(address user, uint256 lockupId, bool force) external returns (uint256 amount);

    function migrateVestingLock(address oldUser, address newUser, uint256 lockupId)
        external
        returns (uint256 newLockupId);

    function extendVestingLock(address user, uint256 lockupId, uint256 amount, uint256 duration) external;

    // Events
    /// Emitted when user staked TRUF or vesting
    event Stake(
        address indexed user, bool indexed isVesting, uint256 lockupId, uint256 amount, uint256 end, uint256 points
    );

    /// Emitted when user unstaked
    event Unstake(
        address indexed user, bool indexed isVesting, uint256 lockupId, uint256 amount, uint256 end, uint256 points
    );

    /// Emitted when lockup migrated to another user (for vesting only)
    event Migrated(address indexed oldUser, address indexed newUser, uint256 oldLockupId, uint256 newLockupId);

    /// Emitted when lockup cancelled (for vesting only)
    event Cancelled(address indexed user, uint256 lockupId, uint256 amount, uint256 points);
}

// 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);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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;
    }
}

{
  "remappings": [
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/",
    "forge-std/=lib/forge-std/src/",
    "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    "@uniswap/v2-periphery/=lib/uniswap-v2-periphery/contracts/",
    "murky/src/=lib/murky/src/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/",
    "openzeppelin/=lib/openzeppelin-contracts/contracts/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "paris",
  "viaIR": false,
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"categoryId","type":"uint256"},{"internalType":"uint256","name":"vestingId","type":"uint256"}],"name":"unstake","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"address","name":"","type":"address"}],"name":"userVestings","outputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"claimed","type":"uint256"},{"internalType":"uint256","name":"locked","type":"uint256"},{"internalType":"uint64","name":"startTime","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"veTRUF","outputs":[{"internalType":"contract IVotingEscrow","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"vestingInfos","outputs":[{"internalType":"uint64","name":"initialReleasePct","type":"uint64"},{"internalType":"uint64","name":"initialReleasePeriod","type":"uint64"},{"internalType":"uint64","name":"cliff","type":"uint64"},{"internalType":"uint64","name":"period","type":"uint64"},{"internalType":"uint64","name":"unit","type":"uint64"}],"stateMutability":"view","type":"function"}]

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00000000000000000000000038c2a4a7330b22788374b8ff70bba513c8d848ca0000000000000000000000000000000000000000000000000000000066659940

-----Decoded View---------------
Arg [0] : _trufToken (address): 0x38C2a4a7330b22788374B8Ff70BBa513C8D848cA
Arg [1] : _tgeTime (uint64): 1717934400

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 00000000000000000000000038c2a4a7330b22788374b8ff70bba513c8d848ca
Arg [1] : 0000000000000000000000000000000000000000000000000000000066659940