// File: contracts/Vesting.sol



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

import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol';
import "@openzeppelin/contracts/security/Pausable.sol";

import "./libraries/PercentageVestingLibrary.sol";
import "./Managable.sol";

// @notice does not work with deflationary tokens (BITS and OIL are not deflationary)
contract Vesting is Managable, Pausable {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;
    using PercentageVestingLibrary for PercentageVestingLibrary.Data;

    struct VestingPool {
        PercentageVestingLibrary.Data data;
        uint256 totalAmount;
        uint256 allocatedAmount;
    }

    struct UserVesting {
        address receiver;
        uint256 totalAmount;
        uint256 withdrawnAmount;
        uint256 vestingPoolId;
        bool cancelIsRestricted;
    }

    IERC20 public coin;
    address public coinAddress;
    uint256 public totalUserVestingsCount;
    uint256 public totalVestingPoolsCount;
    mapping (address /* user wallet */ => uint256[] /* list of vesting ids */) public userVestingIds;
    mapping (uint256 /* userVestingId */ => UserVesting) public userVestings;
    mapping (uint256 /* vestingPoolId */ => VestingPool) public vestingPools;

    event VestingPoolCreated(
        uint256 indexed vestingPoolId,
        uint16 tgePercentage,
        uint32 tge,
        uint32 cliffDuration,
        uint32 vestingDuration,
        uint32 vestingInterval,
        uint256 totalAmount
    );
    event UserVestingCreated (
        uint256 indexed userVestingId,
        address receiver,
        uint256 totalAmount,
        uint256 vestingPoolId,
        bool cancelIsRestricted
    );
    event UserVestingCanceled(
        uint256 indexed userVestingId,
        uint256 restAmount
    );
    event Withdrawn(
        uint256 indexed userVestingId,
        address indexed user,
        uint256 amount
    );
    event TotalWithdrawn(
        address indexed user,
        uint256 amount
    );
    event EmergencyWithdrawToken(
        address token,
        address to,
        uint quantity
    );
    

    function userVestingsLength(address user) external view returns(uint256 length) {
        length = userVestingIds[user].length;
    }

    function userVestingsIds(address user) external view returns(uint256[] memory) {
        return userVestingIds[user];
    }

    constructor(address _coinAddress) {
        require(_coinAddress != address(0), "ZERO_ADDRESS");
        coin = IERC20(_coinAddress);
        coinAddress = _coinAddress;

        _addManager(msg.sender);
    }

    function getVestingPool(uint256 vestingPoolId) external view returns(
        uint16 tgePercentage,
        uint32 tge,
        uint32 cliffDuration,
        uint32 vestingDuration,
        uint32 vestingInterval,
        uint256 totalAmount,
        uint256 allocatedAmount
    ) {
        (
            tgePercentage,
            tge,
            cliffDuration,
            vestingDuration,
            vestingInterval
        ) = vestingPools[vestingPoolId].data.vestingDetails();
        totalAmount = vestingPools[vestingPoolId].totalAmount;
        allocatedAmount = vestingPools[vestingPoolId].allocatedAmount;
    }

    function getVestingParams(uint256 vestingPoolId) external view returns(
        uint16 tgePercentage,
        uint32 tge,
        uint32 cliffDuration,
        uint32 vestingDuration,
        uint32 vestingInterval
    ) {
        return vestingPools[vestingPoolId].data.vestingDetails();
    }

    function getUserVesting(uint256 userVestingId) public view returns(
        address receiver,
        uint256 totalAmount,
        uint256 withdrawnAmount,
        uint256 vestingPoolId,
        uint256 avaliable,
        bool cancelIsRestricted
    ) {
        UserVesting storage o = userVestings[userVestingId];
        require(o.receiver != address(0), "NOT_EXISTS");

        receiver = o.receiver;
        totalAmount = o.totalAmount;
        withdrawnAmount = o.withdrawnAmount;
        vestingPoolId = o.vestingPoolId;
        avaliable = vestingPools[o.vestingPoolId].data.availableOutputAmount({
            totalAmount: o.totalAmount,
            withdrawnAmount: o.withdrawnAmount
        });
        cancelIsRestricted = o.cancelIsRestricted;
    }

    function getWalletInfo(address wallet) external view returns(
        uint256 totalAmount,
        uint256 alreadyWithdrawn,
        uint256 availableToWithdraw
    ) {
        totalAmount = 0;
        alreadyWithdrawn = 0;
        availableToWithdraw = 0;

        uint256 totalVestingsCount = userVestingIds[wallet].length;
        for (uint256 i; i < totalVestingsCount; i++) {
            uint256 userVestingId = userVestingIds[wallet][i];
            (
                ,
                uint256 _totalAmount,
                uint256 _withdrawnAmount,
                ,
                uint256 _avaliable,
                /* bool cancelIsRestricted */
            ) = getUserVesting(userVestingId);
            totalAmount += _totalAmount;
            alreadyWithdrawn += _withdrawnAmount;
            availableToWithdraw += _avaliable;
        }
    }

    function createVestingPools(
        uint16[] memory tgePercentageList,
        uint32[] memory tgeList,
        uint32[] memory cliffDurationList,
        uint32[] memory vestingDurationList,
        uint32[] memory vestingIntervalList,
        uint256[] memory totalAmountList
    ) external onlyManager {
        uint256 length = tgePercentageList.length;
        require(tgeList.length == length, "length mismatch");
        require(cliffDurationList.length == length, "length mismatch");
        require(vestingDurationList.length == length, "length mismatch");
        require(vestingIntervalList.length == length, "length mismatch");
        require(totalAmountList.length == length, "length mismatch");
        for (uint256 i=0; i < length; i++) {
            createVestingPool({
                tgePercentage: tgePercentageList[i],
                tge: tgeList[i],
                cliffDuration: cliffDurationList[i],
                vestingDuration: vestingDurationList[i],
                vestingInterval: vestingIntervalList[i],
                totalAmount: totalAmountList[i]
            });
        }
    }

    function createVestingPool(
        uint16 tgePercentage,
        uint32 tge,
        uint32 cliffDuration,
        uint32 vestingDuration,
        uint32 vestingInterval,
        uint256 totalAmount
    ) public onlyManager {
        uint256 vestingPoolId = totalVestingPoolsCount++;
        vestingPools[vestingPoolId].data.initialize({
            tgePercentage: tgePercentage,
            tge: tge,
            cliffDuration: cliffDuration,
            vestingDuration: vestingDuration,
            vestingInterval: vestingInterval
        });
        vestingPools[vestingPoolId].totalAmount = totalAmount;
        coin.safeTransferFrom(msg.sender, address(this), totalAmount);
        emit VestingPoolCreated({
            vestingPoolId: vestingPoolId,
            tgePercentage: tgePercentage,
            tge: tge,
            cliffDuration: cliffDuration,
            vestingDuration: vestingDuration,
            vestingInterval: vestingInterval,
            totalAmount: totalAmount
        });
    }

    function createUserVesting(
        address receiver,
        uint256 totalAmount,
        uint256 vestingPoolId,
        bool cancelIsRestricted
    ) public onlyManager {
        require(receiver != address(0), "ZERO_ADDRESS");
        require(totalAmount > 0, "ZERO_AMOUNT");
        VestingPool storage vestingPool = vestingPools[vestingPoolId];

        vestingPool.allocatedAmount += totalAmount;
        require(vestingPool.allocatedAmount <= vestingPool.totalAmount, "too much allocated");

        require(vestingPool.data.tge > 0, "VESTING_PARAMS_NOT_EXISTS");
        uint256 userVestingId = totalUserVestingsCount++;
        userVestings[userVestingId] = UserVesting({
            receiver: receiver,
            totalAmount: totalAmount,
            withdrawnAmount: 0,
            vestingPoolId: vestingPoolId,
            cancelIsRestricted: cancelIsRestricted
        });
        userVestingIds[receiver].push(userVestingId);
        emit UserVestingCreated({
            userVestingId: userVestingId,
            receiver: receiver,
            totalAmount: totalAmount,
            vestingPoolId: vestingPoolId,
            cancelIsRestricted: cancelIsRestricted
        });
    }

    function createUserVestings(
        address[] memory receiverList,
        uint256[] memory totalAmountList,
        uint256[] memory vestingPoolIdList,
        bool[] memory cancelIsRestrictedList
    ) external onlyManager {
        uint256 length = receiverList.length;
        require(totalAmountList.length == length, "length mismatch");
        require(vestingPoolIdList.length == length, "length mismatch");
        require(cancelIsRestrictedList.length == length, "length mismatch");
        for (uint i = 0; i < length; i++) {
            createUserVesting({
                receiver: receiverList[i],
                totalAmount: totalAmountList[i],
                vestingPoolId: vestingPoolIdList[i],
                cancelIsRestricted: cancelIsRestrictedList[i]
            });
        }
    }

    /// @notice cancel user vesting, returns the rest of tokens to the owner account
    /// @param userVestingId userVestingId
    /// @param indexInUserVestingIds index of `userVestingId` inside userVestingIds[receiver], to get rid of onchain for-loop to search
    function cancelUserVesting(uint256 userVestingId, uint256 indexInUserVestingIds) external onlyManager {
        UserVesting storage userVesting = userVestings[userVestingId];
        address receiver = userVesting.receiver;
        require(receiver != address(0), "NOT_EXISTS");
        require(!userVesting.cancelIsRestricted, "update is restricted");

        uint256 restAmount = userVesting.totalAmount - userVesting.withdrawnAmount;

        // remove from userVestingIds
        require(indexInUserVestingIds < userVestingIds[receiver].length, "indexInUserVestingIds is out of range");
        require(userVestingIds[receiver][indexInUserVestingIds] == userVestingId, "wrong indexInUserVestingIds");
        if (indexInUserVestingIds != userVestingIds[receiver].length-1) {
            userVestingIds[receiver][indexInUserVestingIds] = userVestingIds[receiver][userVestingIds[receiver].length-1];
        }
        userVestingIds[receiver].pop();

        vestingPools[userVesting.vestingPoolId].allocatedAmount -= restAmount;
        emit UserVestingCanceled({
            userVestingId: userVestingId,
            restAmount: restAmount
        });
    }

    function withdraw(uint256 userVestingId) public whenNotPaused {
        UserVesting memory userVesting = userVestings[userVestingId];
        require(userVesting.receiver == msg.sender, "NOT_RECEIVER");
        uint256 amountToWithdraw = vestingPools[userVesting.vestingPoolId].data.availableOutputAmount({
            totalAmount: userVesting.totalAmount,
            withdrawnAmount: userVesting.withdrawnAmount
        });

        userVestings[userVestingId].withdrawnAmount += amountToWithdraw;
        coin.safeTransfer(msg.sender, amountToWithdraw);
        emit Withdrawn({
            userVestingId: userVestingId,
            user: msg.sender,
            amount: amountToWithdraw
        });
    }

    function withdrawAll() external whenNotPaused {
        uint256 totalVestingsCount = userVestingIds[msg.sender].length;
        uint256 totalAmountToWithdraw;
        for (uint256 i; i < totalVestingsCount; i++) {
            uint256 userVestingId = userVestingIds[msg.sender][i];
            UserVesting storage userVesting = userVestings[userVestingId];
            uint256 amountToWithdraw = vestingPools[userVesting.vestingPoolId].data.availableOutputAmount({
                totalAmount: userVesting.totalAmount,
                withdrawnAmount: userVesting.withdrawnAmount
            });
            if (amountToWithdraw > 0) {
                userVestings[userVestingId].withdrawnAmount += amountToWithdraw;
                totalAmountToWithdraw += amountToWithdraw;
                emit Withdrawn({
                    userVestingId: userVestingId,
                    user: msg.sender,
                    amount: amountToWithdraw
                });
            }
        }
        if (totalAmountToWithdraw > 0) {
            coin.safeTransfer(msg.sender, totalAmountToWithdraw);
        }
        emit TotalWithdrawn({user: msg.sender, amount: totalAmountToWithdraw});
    }

    function togglePause() external onlyManager {
        if(paused()) {
            _unpause();
        } else {
            _pause();
        }
    }
        
}
// File: @openzeppelin/contracts/utils/math/SafeMath.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (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;
        }
    }
}

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol



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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

// File: @openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.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;

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    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));
    }

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    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");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    /**
     * @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");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// File: @openzeppelin/contracts/security/Pausable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)

pragma solidity ^0.8.0;

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

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor() {
        _paused = false;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        require(!paused(), "Pausable: paused");
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        require(paused(), "Pausable: not paused");
        _;
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}

// File: contracts/libraries/PercentageVestingLibrary.sol



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

import "@openzeppelin/contracts/utils/math/Math.sol";

import "./BP.sol";


library PercentageVestingLibrary {

    struct Data {
        // uint32 in seconds = 136 years
        uint16 tgePercentage;
        uint32 tge;
        uint32 cliffDuration;
        uint32 vestingDuration;
        uint32 vestingInterval;
    }

    function initialize(
        Data storage self,
        uint16 tgePercentage,
        uint32 tge,
        uint32 cliffDuration,
        uint32 vestingDuration,
        uint32 vestingInterval
    ) internal {
        require(tge > 0, "PercentageVestingLibrary: zero tge");

        // cliff may have zero duration to instantaneously unlock percentage of funds
        require(tgePercentage <= BP.DECIMAL_FACTOR, "PercentageVestingLibrary: CLIFF");
        if (vestingDuration == 0 || vestingInterval == 0) {
            // vesting disabled
            require(vestingDuration == 0 && vestingInterval == 0, "PercentageVestingLibrary: VESTING");
            // when vesting is disabled, cliff must unlock 100% of funds
            require(tgePercentage == BP.DECIMAL_FACTOR, "PercentageVestingLibrary: CLIFF");
        } else {
            require(vestingInterval > 0 && vestingInterval <= vestingDuration, "PercentageVestingLibrary: VESTING");
        }
        self.tgePercentage = tgePercentage;
        self.tge = tge;
        self.cliffDuration = cliffDuration;
        self.vestingDuration = vestingDuration;
        self.vestingInterval = vestingInterval;
    }

    function availableOutputAmount(Data storage self, uint totalAmount, uint withdrawnAmount) view internal returns (uint) {
        if (block.timestamp < self.tge) {
            return 0; // no unlock or vesting yet
        }
        uint cliff = (totalAmount * self.tgePercentage) / BP.DECIMAL_FACTOR;
        uint totalVestingAmount = totalAmount - cliff;
        if (withdrawnAmount == 0) { // first claim
            if (block.timestamp < self.tge + self.cliffDuration) {
                return cliff;
            }
            uint256 vested = _vested({
                self: self,
                withdrawnVestingAmount: 0,
                totalVestingAmount: totalVestingAmount
            });
            return vested + cliff;
        } else {
            if (block.timestamp < self.tge + self.cliffDuration) {
                return 0;
            }
            return _vested({
                self: self,
                withdrawnVestingAmount: withdrawnAmount - cliff,
                totalVestingAmount: totalVestingAmount
            });
        }
    }

    function vestingDetails(Data storage self) internal view returns (uint16, uint32, uint32, uint32, uint32) {
        return (self.tgePercentage, self.tge, self.cliffDuration, self.vestingDuration, self.vestingInterval);
    }

    function _vested(
        Data storage self,
        uint withdrawnVestingAmount,
        uint totalVestingAmount
    ) view private returns (uint) {
        if (self.vestingDuration == 0) {  // this should never happen
            return totalVestingAmount - withdrawnVestingAmount;
        }
        uint vestedPerInterval = totalVestingAmount * self.vestingInterval / self.vestingDuration;
        if (vestedPerInterval == 0) {
            // when maxVested is too small or vestingDuration is too large, vesting reward is too small to even be distributed
            return 0;
        }
        uint cliffEnd = self.tge + self.cliffDuration;
        uint vestingEnd = (totalVestingAmount / vestedPerInterval) * self.vestingInterval + cliffEnd;
        // We guarantee that time is >= cliffEnd
        if (block.timestamp >= vestingEnd) {
            return totalVestingAmount - withdrawnVestingAmount;
        } else {
            uint available = (block.timestamp - cliffEnd) / self.vestingInterval * vestedPerInterval;
            return Math.min(available, totalVestingAmount) - withdrawnVestingAmount;
        }
    }
}
// File: contracts/Managable.sol



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

contract Managable {
    mapping(address => bool) private managers;

    event AddedManager(address _address);
    event RemovedManager(address _address);

    modifier onlyManager() {
        require(managers[msg.sender], "caller is not manager");
        _;
    }

    function addManager(address _manager) external onlyManager {
        _addManager(_manager);
    }

    function removeManager(address _manager) external onlyManager {
        _removeManager(_manager);
    }

    function _addManager(address _manager) internal {
        managers[_manager] = true;
        emit AddedManager(_manager);
    }

    function _removeManager(address _manager) internal {
        managers[_manager] = false;
        emit RemovedManager(_manager);
    }
}
// File: @openzeppelin/contracts/utils/Address.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (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
     * ====
     *
     * [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://diligence.consensys.net/posts/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/v0.5.11/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 functionCall(target, data, "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");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(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) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(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) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason 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 {
            // 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

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// File: @openzeppelin/contracts/utils/Context.sol



// 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;
    }
}

// File: @openzeppelin/contracts/utils/math/Math.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    /**
     * @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 / b + (a % b == 0 ? 0 : 1);
    }
}

// File: contracts/libraries/BP.sol



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

library BP {
    uint16 constant public DECIMAL_FACTOR = 10000;
}