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// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.6.10;

import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { SafeMath } from "@openzeppelin/contracts/math/SafeMath.sol";

/// @title A vesting contract for full time contributors
/// @author 0xModene
/// @notice You can use this contract to set up vesting for full time DAO contributors
/// @dev All function calls are currently implemented without side effects
contract FTCVesting {
    using SafeMath for uint256;

    address public index;
    address public recipient;
    address public treasury;

    uint256 public vestingAmount;
    uint256 public vestingBegin;
    uint256 public vestingCliff;
    uint256 public vestingEnd;

    uint256 public lastUpdate;

    constructor(
        address index_,
        address recipient_,
        address treasury_,
        uint256 vestingAmount_,
        uint256 vestingBegin_,
        uint256 vestingCliff_,
        uint256 vestingEnd_
    ) public {
        require(vestingCliff_ >= vestingBegin_, "FTCVester.constructor: cliff is too early");
        require(vestingEnd_ > vestingCliff_, "FTCVester.constructor: end is too early");

        index = index_;
        recipient = recipient_;
        treasury = treasury_;

        vestingAmount = vestingAmount_;
        vestingBegin = vestingBegin_;
        vestingCliff = vestingCliff_;
        vestingEnd = vestingEnd_;

        lastUpdate = vestingBegin;
    }

    modifier onlyTreasury {
        require(msg.sender == treasury, "FTCVester.onlyTreasury: unauthorized");
        _;
    }

    modifier onlyRecipient {
        require(msg.sender == recipient, "FTCVester.onlyRecipient: unauthorized");
        _;
    }

    modifier overCliff {
        require(block.timestamp >= vestingCliff, "FTCVester.overCliff: cliff not reached");
        _;
    }

    /// @notice Sets new recipient address
    /// @param recipient_ new recipient address
    function setRecipient(address recipient_) external onlyRecipient {
        recipient = recipient_;
    }

    /// @notice Sets new treasury address
    /// @param treasury_ new treasury address
    function setTreasury(address treasury_) external onlyTreasury {
        treasury = treasury_;
    }

    /// @notice Allows recipient to claim all currently vested tokens
    function claim() external onlyRecipient overCliff {
        uint256 amount;
        if (block.timestamp >= vestingEnd) {
            amount = IERC20(index).balanceOf(address(this));
        } else {
            amount = vestingAmount.mul(block.timestamp.sub(lastUpdate)).div(vestingEnd.sub(vestingBegin));
            lastUpdate = block.timestamp;
        }
        IERC20(index).transfer(recipient, amount);
    }

    /// @notice Allows treasury to claw back funds in event of separation from recipient
    function clawback() external onlyTreasury {
        IERC20(index).transfer(treasury, IERC20(index).balanceOf(address(this)));
    }
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @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 `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);
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @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) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @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 sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @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) {
        // 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 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts 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) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts 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) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts 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 mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message 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, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

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

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0000000000000000000000000954906da0bf32d5479e25f46056d22f08464cab00000000000000000000000028a4e12c38f052a4d9faaf17914ff6363ae97df40000000000000000000000009467cfadc9de245010df95ec6a585a506a8ad5fc00000000000000000000000000000000000000000000032d26d12e980b60000000000000000000000000000000000000000000000000000000000000603be83000000000000000000000000000000000000000000000000000000000612a79a00000000000000000000000000000000000000000000000000000000063fe4f30

-----Decoded View---------------
Arg [0] : index_ (address): 0x0954906da0Bf32d5479e25f46056d22f08464cab
Arg [1] : recipient_ (address): 0x28A4E12c38f052A4D9FaaF17914ff6363AE97DF4
Arg [2] : treasury_ (address): 0x9467cfADC9DE245010dF95Ec6a585A506A8ad5FC
Arg [3] : vestingAmount_ (uint256): 15000000000000000000000
Arg [4] : vestingBegin_ (uint256): 1614538800
Arg [5] : vestingCliff_ (uint256): 1630173600
Arg [6] : vestingEnd_ (uint256): 1677610800

-----Encoded View---------------
7 Constructor Arguments found :
Arg [0] : 0000000000000000000000000954906da0bf32d5479e25f46056d22f08464cab
Arg [1] : 00000000000000000000000028a4e12c38f052a4d9faaf17914ff6363ae97df4
Arg [2] : 0000000000000000000000009467cfadc9de245010df95ec6a585a506a8ad5fc
Arg [3] : 00000000000000000000000000000000000000000000032d26d12e980b600000
Arg [4] : 00000000000000000000000000000000000000000000000000000000603be830
Arg [5] : 00000000000000000000000000000000000000000000000000000000612a79a0
Arg [6] : 0000000000000000000000000000000000000000000000000000000063fe4f30