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// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "./IBEP20.sol";

contract Vesting is AccessControl, ReentrancyGuard {
    using SafeMath for uint256;
    bytes32 public constant TREASURY_ROLE = keccak256("TREASURY_ROLE");
    uint256 public projectIndex;
    uint256 public poolIndex;
    mapping(uint256 => Pool) public pools;
    mapping(uint256 => Project) public projects;

    event CreatePoolEvent(uint256 poolId);
    event CreateProjectEvent(uint256 project, string name, address tokenFund);
    event AddFundEvent(uint256 poolId, address user, uint256 fundAmount);
    event RemoveFundEvent(uint256 poolId, address user);
    event ClaimFundEvent(
        uint256 poolId,
        address user,
        uint256 fundClaimed,
        address contractAddress
    );
    event DepositFundEvent(
        address contractAddress,
        address user,
        uint256 fundAmount
    );
    event WithdrawFundEvent(
        address contractAddress,
        address user,
        uint256 fundAmount
    );

    uint8 private constant VESTING_TYPE_MILESTONE_UNLOCK_FIRST = 1;
    uint8 private constant VESTING_TYPE_MILESTONE_CLIFF_FIRST = 2;
    uint8 private constant VESTING_TYPE_LINEAR_UNLOCK_FIRST = 3;
    uint8 private constant VESTING_TYPE_LINEAR_CLIFF_FIRST = 4;

    uint256 private constant ONE_HUNDRED_PERCENT_SCALED = 10000;
    uint256 private constant ONE_HUNDRED_YEARS_IN_S = 3153600000;

    enum PoolState {
        NEW,
        STARTING,
        PAUSE,
        SUCCESS
    }

    struct Project {
        uint256 id;
        IBEP20 tokenFund;
        string name;
        uint256[] poolIds;
    }

    struct Pool {
        IBEP20 tokenFund;
        uint256 id;
        Project project;
        string name;
        uint8 vestingType;
        uint256 tge;
        uint256 cliff;
        uint256 unlockPercent;
        uint256 linearVestingDuration;
        uint256[] milestoneTimes;
        uint256[] milestonePercents;
        mapping(address => uint256) funds;
        mapping(address => uint256) released;
        uint256 fundsTotal;
        uint256 fundsClaimed;
        PoolState state;
    }

    constructor(address admin, address treasury) {
        _setupRole(DEFAULT_ADMIN_ROLE, admin);
        _setupRole(TREASURY_ROLE, treasury);
        _setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
        poolIndex = 200;
        projectIndex = 1;
    }

    modifier onlyAdmin() {
        require(
            hasRole(DEFAULT_ADMIN_ROLE, msg.sender),
            "Restricted to admins!"
        );
        _;
    }

    modifier onlyTreasury() {
        require(hasRole(TREASURY_ROLE, msg.sender), "Restricted to treasury!");
        _;
    }

    function createProject(
        address _tokenFund,
        string memory _name
    ) external nonReentrant onlyAdmin {
        uint256 index = projectIndex++;
        Project storage project = projects[index];
        project.id = index;
        project.name = _name;
        project.tokenFund = IBEP20(_tokenFund);

        emit CreateProjectEvent(index, _name, _tokenFund);
    }

    function createPool(
        address _tokenFund,
        string memory _name,
        uint256 _projectId,
        uint8 _vestingType,
        uint256 _tge,
        uint256 _cliff,
        uint256 _unlockPercent,
        uint256 _linearVestingDuration,
        uint256[] memory _milestoneTimes,
        uint256[] memory _milestonePercents
    ) external nonReentrant onlyAdmin {
        _validateSetup(
            _vestingType,
            _unlockPercent,
            _tge,
            _cliff,
            _linearVestingDuration,
            _milestoneTimes,
            _milestonePercents
        );

        require(
            _projectId > 0 && _projectId <= projectIndex,
            "Invalid project id"
        );
        Project storage project = projects[_projectId];
        require(address(project.tokenFund) == _tokenFund, "Invalid tokenFund");

        uint256 index = poolIndex++;
        Pool storage pool = pools[index];
        pool.id = index;
        pool.tokenFund = IBEP20(_tokenFund);
        pool.name = _name;
        pool.vestingType = _vestingType;
        pool.tge = _tge;
        pool.cliff = _cliff;
        pool.unlockPercent = _unlockPercent;
        pool.linearVestingDuration = _linearVestingDuration;
        pool.milestoneTimes = _milestoneTimes;
        pool.milestonePercents = _milestonePercents;
        pool.fundsTotal = 0;
        pool.fundsClaimed = 0;
        pool.state = PoolState.NEW;

        project.poolIds.push(pool.id);

        pool.project = project;

        emit CreatePoolEvent(index);
    }

    function start(uint256 _poolId) external nonReentrant onlyAdmin {
        Pool storage pool = pools[_poolId];
        require(
            pool.state == PoolState.NEW || pool.state == PoolState.PAUSE,
            "Invalid action"
        );
        pool.state = PoolState.STARTING;
    }

    function pause(uint256 _poolId) external nonReentrant onlyAdmin {
        Pool storage pool = pools[_poolId];
        require(pool.state != PoolState.PAUSE, "Invalid action");
        pool.state = PoolState.PAUSE;
    }

    function end(uint256 _poolId) external nonReentrant onlyAdmin {
        Pool storage pool = pools[_poolId];
        require(pool.state == PoolState.STARTING, "Invalid action");
        pool.state = PoolState.SUCCESS;
    }

    function addFunds(
        uint256 _poolId,
        uint256[] memory _fundAmounts,
        address[] memory _users
    ) external nonReentrant onlyAdmin {
        require(
            _users.length == _fundAmounts.length,
            "Input arrays length mismatch"
        );

        Pool storage pool = pools[_poolId];
        for (uint256 i = 0; i < _users.length; i++) {
            address user = _users[i];
            uint256 fundAmount = _fundAmounts[i];
            uint256 oldFund = pool.funds[user];
            if (oldFund > 0) {
                pool.fundsTotal = pool.fundsTotal.add(fundAmount);
                pool.funds[user] = pool.funds[user].add(fundAmount);
            } else {
                pool.fundsTotal = pool.fundsTotal.add(fundAmount);
                pool.funds[user] = pool.funds[user].add(fundAmount);
                pool.released[user] = 0;
            }
            emit AddFundEvent(_poolId, user, fundAmount);
        }
    }

    function removeFunds(
        uint256 _poolId,
        address[] memory _users
    ) external nonReentrant onlyAdmin {
        Pool storage pool = pools[_poolId];
        for (uint256 i = 0; i < _users.length; i++) {
            address user = _users[i];
            uint256 oldFund = pool.funds[user];
            if (oldFund > 0) {
                pool.funds[user] = 0;
                pool.released[user] = 0;
                pool.fundsTotal = pool.fundsTotal.sub(oldFund);

                emit RemoveFundEvent(_poolId, user);
            }
        }
    }

    function claimFund(uint256 _poolId) external nonReentrant {
        _validateClaimFund(_poolId);
        _claim(_poolId);
    }

    function claimAll(uint256 _projectId) external nonReentrant {
        require(
            _projectId > 0 && _projectId <= projectIndex,
            "Invalid project id"
        );
        //get pools user joined in project
        for (uint256 i = 0; i < projects[_projectId].poolIds.length; i++) {
            uint256 poolId = projects[_projectId].poolIds[i];
            //validate
            if(checkClaimablePool(poolId, _msgSender())){
                _claim(poolId);
            }

        }
    }



    function _claim(uint256 _poolId) internal {
        Pool storage pool = pools[_poolId];
        uint256 _now = block.timestamp;
        require(_now >= pool.tge, "Invalid Time");
        uint256 claimPercent = computeClaimPercent(_poolId, _now);
        require(claimPercent > 0, "Not enough unlock token to claim");

        uint256 claimTotal = (pool.funds[_msgSender()].mul(claimPercent)).div(
            ONE_HUNDRED_PERCENT_SCALED
        );
        require(claimTotal > pool.released[_msgSender()], "Not enough unlock token to claim");
        uint256 claimRemain = claimTotal.sub(pool.released[_msgSender()]);

        pool.tokenFund.transfer(_msgSender(), claimRemain);

        pool.released[_msgSender()] = pool.released[_msgSender()].add(
            claimRemain
        );
        pool.fundsClaimed = pool.fundsClaimed.add(claimRemain);

        emit ClaimFundEvent(_poolId, _msgSender(), claimRemain, address(this));
    }

    function depositFund(
        uint256 _poolId,
        uint256 _fundAmount
    ) external nonReentrant onlyTreasury {
        require(_fundAmount > 0, "Amount must be greater than zero");

        Pool storage pool = pools[_poolId];

        require(
            pool.tokenFund.balanceOf(_msgSender()) >= _fundAmount,
            "Error: not enough Token"
        );

        pool.tokenFund.transferFrom(_msgSender(), address(this), _fundAmount);

        emit DepositFundEvent(address(this), _msgSender(), _fundAmount);
    }

    function withdrawFund(
        uint256 _poolId,
        uint256 _fundAmount
    ) external nonReentrant onlyTreasury {
        require(_fundAmount > 0, "Amount must be greater than zero");
        Pool storage pool = pools[_poolId];
        require(
            pool.tokenFund.balanceOf(address(this)) >= _fundAmount,
            "Fund insufficient!"
        );

        pool.tokenFund.transfer(_msgSender(), _fundAmount);

        emit WithdrawFundEvent(address(this), _msgSender(), _fundAmount);
    }

    function computeClaimPercent(
        uint256 _poolId,
        uint256 _now
    ) public view returns (uint256) {
        Pool storage pool = pools[_poolId];
        uint256[] memory milestoneTimes = pool.milestoneTimes;
        uint256[] memory milestonePercents = pool.milestonePercents;
        uint256 totalPercent = 0;
        uint256 tge = pool.tge;
        if (pool.vestingType == VESTING_TYPE_MILESTONE_CLIFF_FIRST) {
            if (_now >= tge.add(pool.cliff)) {
                totalPercent = totalPercent.add(pool.unlockPercent);
                for (uint i = 0; i < milestoneTimes.length; i++) {
                    uint256 milestoneTime = milestoneTimes[i];
                    uint256 milestonePercent = milestonePercents[i];
                    if (_now >= milestoneTime) {
                        totalPercent = totalPercent.add(milestonePercent);
                    }
                }
            }
        } else if (pool.vestingType == VESTING_TYPE_MILESTONE_UNLOCK_FIRST) {
            if (_now >= tge) {
                totalPercent = totalPercent.add(pool.unlockPercent);
                if (_now >= tge.add(pool.cliff)) {
                    for (uint i = 0; i < milestoneTimes.length; i++) {
                        uint256 milestoneTime = milestoneTimes[i];
                        uint256 milestonePercent = milestonePercents[i];
                        if (_now >= milestoneTime) {
                            totalPercent = totalPercent.add(milestonePercent);
                        }
                    }
                }
            }
        } else if (pool.vestingType == VESTING_TYPE_LINEAR_UNLOCK_FIRST) {
            if (_now >= tge) {
                totalPercent = totalPercent.add(pool.unlockPercent);
                if (_now >= tge.add(pool.cliff)) {
                    uint256 delta = _now.sub(tge).sub(pool.cliff);
                    totalPercent = totalPercent.add(
                        delta
                            .mul(
                                ONE_HUNDRED_PERCENT_SCALED.sub(
                                    pool.unlockPercent
                                )
                            )
                            .div(pool.linearVestingDuration)
                    );
                }
            }
        } else if (pool.vestingType == VESTING_TYPE_LINEAR_CLIFF_FIRST) {
            if (_now >= tge.add(pool.cliff)) {
                totalPercent = totalPercent.add(pool.unlockPercent);
                uint256 delta = _now.sub(tge).sub(pool.cliff);
                totalPercent = totalPercent.add(
                    delta
                        .mul(ONE_HUNDRED_PERCENT_SCALED.sub(pool.unlockPercent))
                        .div(pool.linearVestingDuration)
                );
            }
        }
        return
            (totalPercent < ONE_HUNDRED_PERCENT_SCALED)
                ? totalPercent
                : ONE_HUNDRED_PERCENT_SCALED;
    }

    function getFundByUser(
        uint256 _poolId,
        address _user
    ) public view returns (uint256, uint256) {
        return (pools[_poolId].funds[_user], pools[_poolId].released[_user]);
    }

    function getInfoUserReward(
        uint256 _poolId
    ) public view returns (uint256, uint256) {
        Pool storage pool = pools[_poolId];
        uint256 tokenTotal = pool.fundsTotal;
        uint256 claimedTotal = pool.fundsClaimed;

        return (tokenTotal, claimedTotal);
    }

  function checkClaimablePool(uint256 _poolId, address _user) public view returns (bool) {
        Pool storage pool = pools[_poolId];
        if (pool.state != PoolState.STARTING) return false;
        uint256 _now = block.timestamp;
        if (_now < pool.tge) return false;
        if (pool.funds[_user] <= 0) return false;
        if (pool.funds[_user] <= pool.released[_user])
            return false;

        uint256 claimPercent = computeClaimPercent(_poolId, _now);
        if (claimPercent <= 0) return false;
        uint256 claimTotal = (pool.funds[_user].mul(claimPercent)).div(
            ONE_HUNDRED_PERCENT_SCALED
        );
        if (claimTotal <= pool.released[_user]) return false;
        return true;
    }

    function checkClaimableProject(uint256 _projectId, address _user) public view returns (bool) {
        require(
            _projectId > 0 && _projectId <= projectIndex,
            "Invalid project id"
        );
        for (uint256 i = 0; i < projects[_projectId].poolIds.length; i++) {
            if(checkClaimablePool(projects[_projectId].poolIds[i], _user)){
                return true;
            }
        }
        return false;
    }

    function getPool(
        uint256 _poolId
    )
        public
        view
        returns (
            address,
            string memory,
            uint8,
            uint256,
            uint256,
            uint256,
            uint256,
            uint256[] memory,
            uint256[] memory,
            uint256,
            uint256,
            PoolState
        )
    {
        Pool storage pool = pools[_poolId];
        return (
            address(pool.tokenFund),
            pool.name,
            pool.vestingType,
            pool.tge,
            pool.cliff,
            pool.unlockPercent,
            pool.linearVestingDuration,
            pool.milestoneTimes,
            pool.milestonePercents,
            pool.fundsTotal,
            pool.fundsClaimed,
            pool.state
        );
    }

    function _validateClaimFund(uint256 _poolId) private view {
        Pool storage pool = pools[_poolId];
        require(pool.state == PoolState.STARTING, "Invalid action");
        require(
            pool.funds[_msgSender()] > 0,
            "Amount must be greater than zero"
        );
        require(
            pool.funds[_msgSender()] > pool.released[_msgSender()],
            "All money has been claimed"
        );
    }

    function _validateSetup(
        uint8 _vestingType,
        uint256 _unlockPercent,
        uint256 _tge,
        uint256 _cliff,
        uint256 _linearVestingDuration,
        uint256[] memory _milestoneTimes,
        uint256[] memory _milestonePercents
    ) private {
        require(
            _vestingType >= VESTING_TYPE_MILESTONE_UNLOCK_FIRST &&
                _vestingType <= VESTING_TYPE_LINEAR_CLIFF_FIRST,
            "Invalid action"
        );
        require(
                _unlockPercent >= 0 &&
                _unlockPercent <= ONE_HUNDRED_PERCENT_SCALED &&
                _cliff >= 0,
            "Invalid input parameter"
        );
        if (
            _vestingType == VESTING_TYPE_MILESTONE_CLIFF_FIRST ||
            _vestingType == VESTING_TYPE_MILESTONE_UNLOCK_FIRST
        ) {
            require(
                _milestoneTimes.length == _milestonePercents.length &&
                    _milestoneTimes.length >= 0 &&
                    _linearVestingDuration >= 0,
                "Invalid vesting parameter"
            );
            uint256 total = _unlockPercent;
            uint256 curTime = 0;
            for (uint i = 0; i < _milestoneTimes.length; i++) {
                total = total + _milestonePercents[i];
                uint256 tmpTime = _milestoneTimes[i];
                require(
                    tmpTime >= _tge + _cliff && tmpTime > curTime,
                    "Invalid input parameter"
                );
                curTime = tmpTime;
            }
            require(
                total == ONE_HUNDRED_PERCENT_SCALED,
                "Invalid vesting parameter"
            );
        } else {
            require(
                _milestoneTimes.length == 0 &&
                    _milestonePercents.length == 0 &&
                    (_linearVestingDuration > 0 &&
                        _linearVestingDuration <= ONE_HUNDRED_YEARS_IN_S),
                "Invalid vesting parameter"
            );
        }
    }
}

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

pragma solidity ^0.8.0;

import "./IAccessControl.sol";
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "../utils/introspection/ERC165.sol";

/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms. This is a lightweight version that doesn't allow enumerating role
 * members except through off-chain means by accessing the contract event logs. Some
 * applications may benefit from on-chain enumerability, for those cases see
 * {AccessControlEnumerable}.
 *
 * Roles are referred to by their `bytes32` identifier. These should be exposed
 * in the external API and be unique. The best way to achieve this is by
 * using `public constant` hash digests:
 *
 * ```solidity
 * bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
 * ```
 *
 * Roles can be used to represent a set of permissions. To restrict access to a
 * function call, use {hasRole}:
 *
 * ```solidity
 * function foo() public {
 *     require(hasRole(MY_ROLE, msg.sender));
 *     ...
 * }
 * ```
 *
 * Roles can be granted and revoked dynamically via the {grantRole} and
 * {revokeRole} functions. Each role has an associated admin role, and only
 * accounts that have a role's admin role can call {grantRole} and {revokeRole}.
 *
 * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
 * that only accounts with this role will be able to grant or revoke other
 * roles. More complex role relationships can be created by using
 * {_setRoleAdmin}.
 *
 * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
 * grant and revoke this role. Extra precautions should be taken to secure
 * accounts that have been granted it. We recommend using {AccessControlDefaultAdminRules}
 * to enforce additional security measures for this role.
 */
abstract contract AccessControl is Context, IAccessControl, ERC165 {
    struct RoleData {
        mapping(address => bool) members;
        bytes32 adminRole;
    }

    mapping(bytes32 => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

    /**
     * @dev Modifier that checks that an account has a specific role. Reverts
     * with a standardized message including the required role.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     *
     * _Available since v4.1._
     */
    modifier onlyRole(bytes32 role) {
        _checkRole(role);
        _;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) public view virtual override returns (bool) {
        return _roles[role].members[account];
    }

    /**
     * @dev Revert with a standard message if `_msgSender()` is missing `role`.
     * Overriding this function changes the behavior of the {onlyRole} modifier.
     *
     * Format of the revert message is described in {_checkRole}.
     *
     * _Available since v4.6._
     */
    function _checkRole(bytes32 role) internal view virtual {
        _checkRole(role, _msgSender());
    }

    /**
     * @dev Revert with a standard message if `account` is missing `role`.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     */
    function _checkRole(bytes32 role, address account) internal view virtual {
        if (!hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "AccessControl: account ",
                        Strings.toHexString(account),
                        " is missing role ",
                        Strings.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {
        return _roles[role].adminRole;
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleGranted} event.
     */
    function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _grantRole(role, account);
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleRevoked} event.
     */
    function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _revokeRole(role, account);
    }

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been revoked `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     *
     * May emit a {RoleRevoked} event.
     */
    function renounceRole(bytes32 role, address account) public virtual override {
        require(account == _msgSender(), "AccessControl: can only renounce roles for self");

        _revokeRole(role, account);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event. Note that unlike {grantRole}, this function doesn't perform any
     * checks on the calling account.
     *
     * May emit a {RoleGranted} event.
     *
     * [WARNING]
     * ====
     * This function should only be called from the constructor when setting
     * up the initial roles for the system.
     *
     * Using this function in any other way is effectively circumventing the admin
     * system imposed by {AccessControl}.
     * ====
     *
     * NOTE: This function is deprecated in favor of {_grantRole}.
     */
    function _setupRole(bytes32 role, address account) internal virtual {
        _grantRole(role, account);
    }

    /**
     * @dev Sets `adminRole` as ``role``'s admin role.
     *
     * Emits a {RoleAdminChanged} event.
     */
    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
        bytes32 previousAdminRole = getRoleAdmin(role);
        _roles[role].adminRole = adminRole;
        emit RoleAdminChanged(role, previousAdminRole, adminRole);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleGranted} event.
     */
    function _grantRole(bytes32 role, address account) internal virtual {
        if (!hasRole(role, account)) {
            _roles[role].members[account] = true;
            emit RoleGranted(role, account, _msgSender());
        }
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleRevoked} event.
     */
    function _revokeRole(bytes32 role, address account) internal virtual {
        if (hasRole(role, account)) {
            _roles[role].members[account] = false;
            emit RoleRevoked(role, account, _msgSender());
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)

pragma solidity ^0.8.0;

/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControl {
    /**
     * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
     *
     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
     * {RoleAdminChanged} not being emitted signaling this.
     *
     * _Available since v3.1._
     */
    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);

    /**
     * @dev Emitted when `account` is granted `role`.
     *
     * `sender` is the account that originated the contract call, an admin role
     * bearer except when using {AccessControl-_setupRole}.
     */
    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Emitted when `account` is revoked `role`.
     *
     * `sender` is the account that originated the contract call:
     *   - if using `revokeRole`, it is the admin role bearer
     *   - if using `renounceRole`, it is the role bearer (i.e. `account`)
     */
    event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) external view returns (bool);

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {AccessControl-_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) external view returns (bytes32);

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function grantRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function revokeRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been granted `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     */
    function renounceRole(bytes32 role, address account) external;
}

// 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;
    }
}

// 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;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

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

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                // The surrounding unchecked block does not change this fact.
                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1, "Math: mulDiv overflow");

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10 ** 64) {
                value /= 10 ** 64;
                result += 64;
            }
            if (value >= 10 ** 32) {
                value /= 10 ** 32;
                result += 32;
            }
            if (value >= 10 ** 16) {
                value /= 10 ** 16;
                result += 16;
            }
            if (value >= 10 ** 8) {
                value /= 10 ** 8;
                result += 8;
            }
            if (value >= 10 ** 4) {
                value /= 10 ** 4;
                result += 4;
            }
            if (value >= 10 ** 2) {
                value /= 10 ** 2;
                result += 2;
            }
            if (value >= 10 ** 1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 256, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0);
        }
    }
}

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

pragma solidity ^0.8.0;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard signed math utilities missing in the Solidity language.
 */
library SignedMath {
    /**
     * @dev Returns the largest of two signed numbers.
     */
    function max(int256 a, int256 b) internal pure returns (int256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two signed numbers.
     */
    function min(int256 a, int256 b) internal pure returns (int256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two signed numbers without overflow.
     * The result is rounded towards zero.
     */
    function average(int256 a, int256 b) internal pure returns (int256) {
        // Formula from the book "Hacker's Delight"
        int256 x = (a & b) + ((a ^ b) >> 1);
        return x + (int256(uint256(x) >> 255) & (a ^ b));
    }

    /**
     * @dev Returns the absolute unsigned value of a signed value.
     */
    function abs(int256 n) internal pure returns (uint256) {
        unchecked {
            // must be unchecked in order to support `n = type(int256).min`
            return uint256(n >= 0 ? n : -n);
        }
    }
}

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

pragma solidity ^0.8.0;

import "./math/Math.sol";
import "./math/SignedMath.sol";

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _SYMBOLS = "0123456789abcdef";
    uint8 private constant _ADDRESS_LENGTH = 20;

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        unchecked {
            uint256 length = Math.log10(value) + 1;
            string memory buffer = new string(length);
            uint256 ptr;
            /// @solidity memory-safe-assembly
            assembly {
                ptr := add(buffer, add(32, length))
            }
            while (true) {
                ptr--;
                /// @solidity memory-safe-assembly
                assembly {
                    mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

    /**
     * @dev Converts a `int256` to its ASCII `string` decimal representation.
     */
    function toString(int256 value) internal pure returns (string memory) {
        return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMath.abs(value))));
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        unchecked {
            return toHexString(value, Math.log256(value) + 1);
        }
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }

    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
    }

    /**
     * @dev Returns true if the two strings are equal.
     */
    function equal(string memory a, string memory b) internal pure returns (bool) {
        return keccak256(bytes(a)) == keccak256(bytes(b));
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later

pragma solidity ^0.8.19;

interface IBEP20 {
    /**
     * @dev Returns the amount of tokens in existence.
   */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the token decimals.
   */
    function decimals() external view returns (uint8);

    /**
     * @dev Returns the token symbol.
   */
    function symbol() external view returns (string memory);

    /**
    * @dev Returns the token name.
  */
    function name() external view returns (string memory);

    /**
     * @dev Returns the bep token owner.
   */
    function getOwner() external view returns (address);

    /**
     * @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 `recipient`.
   *
   * Returns a boolean value indicating whether the operation succeeded.
   *
   * Emits a {Transfer} event.
   */
    function transfer(address recipient, 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 `sender` to `recipient` 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 sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @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);
}

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

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"admin","type":"address"},{"internalType":"address","name":"treasury","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"poolId","type":"uint256"},{"indexed":false,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"fundAmount","type":"uint256"}],"name":"AddFundEvent","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"poolId","type":"uint256"},{"indexed":false,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"fundClaimed","type":"uint256"},{"indexed":false,"internalType":"address","name":"contractAddress","type":"address"}],"name":"ClaimFundEvent","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"poolId","type":"uint256"}],"name":"CreatePoolEvent","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"project","type":"uint256"},{"indexed":false,"internalType":"string","name":"name","type":"string"},{"indexed":false,"internalType":"address","name":"tokenFund","type":"address"}],"name":"CreateProjectEvent","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"contractAddress","type":"address"},{"indexed":false,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"fundAmount","type":"uint256"}],"name":"DepositFundEvent","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"poolId","type":"uint256"},{"indexed":false,"internalType":"address","name":"user","type":"address"}],"name":"RemoveFundEvent","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"previousAdminRole","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"newAdminRole","type":"bytes32"}],"name":"RoleAdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleGranted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleRevoked","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"contractAddress","type":"address"},{"indexed":false,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"fundAmount","type":"uint256"}],"name":"WithdrawFundEvent","type":"event"},{"inputs":[],"name":"DEFAULT_ADMIN_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"TREASURY_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_poolId","type":"uint256"},{"internalType":"uint256[]","name":"_fundAmounts","type":"uint256[]"},{"internalType":"address[]","name":"_users","type":"address[]"}],"name":"addFunds","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_poolId","type":"uint256"},{"internalType":"address","name":"_user","type":"address"}],"name":"checkClaimablePool","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_projectId","type":"uint256"},{"internalType":"address","name":"_user","type":"address"}],"name":"checkClaimableProject","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_projectId","type":"uint256"}],"name":"claimAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_poolId","type":"uint256"}],"name":"claimFund","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_poolId","type":"uint256"},{"internalType":"uint256","name":"_now","type":"uint256"}],"name":"computeClaimPercent","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_tokenFund","type":"address"},{"internalType":"string","name":"_name","type":"string"},{"internalType":"uint256","name":"_projectId","type":"uint256"},{"internalType":"uint8","name":"_vestingType","type":"uint8"},{"internalType":"uint256","name":"_tge","type":"uint256"},{"internalType":"uint256","name":"_cliff","type":"uint256"},{"internalType":"uint256","name":"_unlockPercent","type":"uint256"},{"internalType":"uint256","name":"_linearVestingDuration","type":"uint256"},{"internalType":"uint256[]","name":"_milestoneTimes","type":"uint256[]"},{"internalType":"uint256[]","name":"_milestonePercents","type":"uint256[]"}],"name":"createPool","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_tokenFund","type":"address"},{"internalType":"string","name":"_name","type":"string"}],"name":"createProject","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_poolId","type":"uint256"},{"internalType":"uint256","name":"_fundAmount","type":"uint256"}],"name":"depositFund","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_poolId","type":"uint256"}],"name":"end","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_poolId","type":"uint256"},{"internalType":"address","name":"_user","type":"address"}],"name":"getFundByUser","outputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_poolId","type":"uint256"}],"name":"getInfoUserReward","outputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_poolId","type":"uint256"}],"name":"getPool","outputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"string","name":"","type":"string"},{"internalType":"uint8","name":"","type":"uint8"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256[]","name":"","type":"uint256[]"},{"internalType":"uint256[]","name":"","type":"uint256[]"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"enum Vesting.PoolState","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleAdmin","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"grantRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"hasRole","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_poolId","type":"uint256"}],"name":"pause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"poolIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"pools","outputs":[{"internalType":"contract IBEP20","name":"tokenFund","type":"address"},{"internalType":"uint256","name":"id","type":"uint256"},{"components":[{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"contract IBEP20","name":"tokenFund","type":"address"},{"internalType":"string","name":"name","type":"string"},{"internalType":"uint256[]","name":"poolIds","type":"uint256[]"}],"internalType":"struct Vesting.Project","name":"project","type":"tuple"},{"internalType":"string","name":"name","type":"string"},{"internalType":"uint8","name":"vestingType","type":"uint8"},{"internalType":"uint256","name":"tge","type":"uint256"},{"internalType":"uint256","name":"cliff","type":"uint256"},{"internalType":"uint256","name":"unlockPercent","type":"uint256"},{"internalType":"uint256","name":"linearVestingDuration","type":"uint256"},{"internalType":"uint256","name":"fundsTotal","type":"uint256"},{"internalType":"uint256","name":"fundsClaimed","type":"uint256"},{"internalType":"enum Vesting.PoolState","name":"state","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"projectIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"projects","outputs":[{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"contract IBEP20","name":"tokenFund","type":"address"},{"internalType":"string","name":"name","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_poolId","type":"uint256"},{"internalType":"address[]","name":"_users","type":"address[]"}],"name":"removeFunds","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"renounceRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"revokeRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_poolId","type":"uint256"}],"name":"start","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_poolId","type":"uint256"},{"internalType":"uint256","name":"_fundAmount","type":"uint256"}],"name":"withdrawFund","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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000000000000000000000000f42a2f22176d04fc01a474c8c85a346948960e0200000000000000000000000000c614c2ec381b6c3de8bb0b5f5bb8f56625b93c

-----Decoded View---------------
Arg [0] : admin (address): 0xF42a2f22176D04FC01a474C8C85A346948960E02
Arg [1] : treasury (address): 0x00c614C2EC381b6c3dE8BB0B5F5BB8F56625B93C

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000f42a2f22176d04fc01a474c8c85a346948960e02
Arg [1] : 00000000000000000000000000c614c2ec381b6c3de8bb0b5f5bb8f56625b93c