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// SPDX-License-Identifier: MIT AND AGPL-3.0-or-later

pragma solidity =0.8.9;

import "@openzeppelin/contracts/access/Ownable.sol";

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

import "../../shared/ProtocolConstants.sol";

import "../../interfaces/tokens/vesting/ILinearVesting.sol";

/**
 * @dev Implementation of the {ILinearVesting} interface.
 *
 * The straightforward vesting contract that gradually releases a
 * fixed supply of tokens to multiple vest parties over a 2 year
 * window.
 *
 * The token expects the {begin} hook to be invoked the moment
 * it is supplied with the necessary amount of tokens to vest,
 * which should be equivalent to the time the {setComponents}
 * function is invoked on the Vader token.
 */
contract LinearVesting is ILinearVesting, ProtocolConstants, Ownable {
    /* ========== LIBRARIES ========== */

    /* ========== STATE VARIABLES ========== */

    // The Vader token
    IERC20 public immutable vader;

    // The start of the vesting period
    uint256 public start;

    // The end of the vesting period
    uint256 public end;

    // The status of each vesting member (Vester)
    mapping(address => Vester) public vest;

    // The address of Converter contract.
    address public converter;

    /* ========== CONSTRUCTOR ========== */

    /**
     * @dev Initializes the contract's vesters and vesting amounts as well as sets
     * the Vader token address.
     *
     * It conducts a sanity check to ensure that the total vesting amounts specified match
     * the team allocation to ensure that the contract is deployed correctly.
     *
     * Additionally, it transfers ownership to the Vader contract that needs to consequently
     * initiate the vesting period via {begin} after it mints the necessary amount to the contract.
     */
    constructor(IERC20 _vader, address _converter) {
        require(
            _vader != IERC20(_ZERO_ADDRESS) && _converter != _ZERO_ADDRESS,
            "LinearVesting::constructor: Misconfiguration"
        );

        vader = _vader;
        converter = _converter;

        transferOwnership(address(_vader));
    }

    /* ========== VIEWS ========== */

    /**
     * @dev Returns the amount a user can claim at a given point in time.
     *
     * Requirements:
     * - the vesting period has started
     */
    function getClaim(address _vester)
        external
        view
        override
        hasStarted
        returns (uint256 vestedAmount)
    {
        Vester memory vester = vest[_vester];
        return
            _getClaim(
                vester.amount,
                vester.lastClaim,
                vester.start,
                vester.end
            );
    }

    /* ========== MUTATIVE FUNCTIONS ========== */

    /**
     * @dev Allows a user to claim their pending vesting amount of the vested claim
     *
     * Emits a {Vested} event indicating the user who claimed their vested tokens
     * as well as the amount that was vested.
     *
     * Requirements:
     *
     * - the vesting period has started
     * - the caller must have a non-zero vested amount
     */
    function claim() external override returns (uint256 vestedAmount) {
        Vester memory vester = vest[msg.sender];

        require(
            vester.start != 0,
            "LinearVesting::claim: Incorrect Vesting Type"
        );

        require(
            vester.start < block.timestamp,
            "LinearVesting::claim: Not Started Yet"
        );

        vestedAmount = _getClaim(
            vester.amount,
            vester.lastClaim,
            vester.start,
            vester.end
        );

        require(vestedAmount != 0, "LinearVesting::claim: Nothing to claim");

        vester.amount -= uint192(vestedAmount);
        vester.lastClaim = uint64(block.timestamp);

        vest[msg.sender] = vester;

        emit Vested(msg.sender, vestedAmount);

        vader.transfer(msg.sender, vestedAmount);
    }

    /* ========== RESTRICTED FUNCTIONS ========== */

    /**
     * @dev Allows the vesting period to be initiated.
     *
     * Emits a {VestingInitialized} event from which the start and
     * end can be calculated via it's attached timestamp.
     *
     * Requirements:
     *
     * - the caller must be the owner (vader token)
     */
    function begin(address[] calldata vesters, uint192[] calldata amounts)
        external
        override
        onlyOwner
    {
        require(
            vesters.length == amounts.length,
            "LinearVesting::begin: Vesters and Amounts lengths do not match"
        );

        uint256 _start = block.timestamp;
        uint256 _end = block.timestamp + _VESTING_DURATION;

        start = _start;
        end = _end;

        uint256 total;
        for (uint256 i = 0; i < vesters.length; i++) {
            require(
                amounts[i] != 0,
                "LinearVesting::begin: Incorrect Amount Specified"
            );
            require(
                vesters[i] != _ZERO_ADDRESS,
                "LinearVesting::begin: Zero Vester Address Specified"
            );
            require(
                vest[vesters[i]].amount == 0,
                "LinearVesting::begin: Duplicate Vester Entry Specified"
            );
            vest[vesters[i]] = Vester(
                amounts[i],
                0,
                uint128(_start),
                uint128(_end)
            );
            total = total + amounts[i];
        }
        require(
            total == _TEAM_ALLOCATION,
            "LinearVesting::begin: Invalid Vest Amounts Specified"
        );

        require(
            vader.balanceOf(address(this)) >= _TEAM_ALLOCATION,
            "LinearVesting::begin: Vader is less than TEAM_ALLOCATION"
        );

        emit VestingInitialized(_VESTING_DURATION);

        renounceOwnership();
    }

    /**
     * @dev Adds a new vesting schedule to the contract.
     *
     * Requirements:
     * - Only {converter} can call.
     */
    function vestFor(address user, uint256 amount)
        external
        override
        onlyConverter
        hasStarted
    {
        require(
            amount <= type(uint192).max,
            "LinearVesting::vestFor: Amount Overflows uint192"
        );
        require(
            vest[user].amount == 0,
            "LinearVesting::vestFor: Already a vester"
        );
        vest[user] = Vester(
            uint192(amount),
            0,
            uint128(block.timestamp),
            uint128(block.timestamp + 365 days)
        );
        vader.transferFrom(msg.sender, address(this), amount);

        emit VestingCreated(user, amount);
    }

    /* ========== PRIVATE FUNCTIONS ========== */

    function _getClaim(
        uint256 amount,
        uint256 lastClaim,
        uint256 _start,
        uint256 _end
    ) private view returns (uint256) {
        if (block.timestamp >= _end) return amount;
        if (lastClaim == 0) lastClaim = _start;

        return (amount * (block.timestamp - lastClaim)) / (_end - lastClaim);
    }

    /**
     * @dev Validates that the vesting period has started
     */
    function _hasStarted() private view {
        require(
            start != 0,
            "LinearVesting::_hasStarted: Vesting hasn't started yet"
        );
    }

    /*
     * @dev Ensures that only converter is able to call a function.
     **/
    function _onlyConverter() private view {
        require(
            msg.sender == converter,
            "LinearVesting::_onlyConverter: Only converter is allowed to call"
        );
    }

    /* ========== MODIFIERS ========== */

    /**
     * @dev Throws if the vesting period hasn't started
     */
    modifier hasStarted() {
        _hasStarted();
        _;
    }

    /*
     * @dev Throws if called by address that is not converter.
     **/
    modifier onlyConverter() {
        _onlyConverter();
        _;
    }
}

// SPDX-License-Identifier: MIT AND AGPL-3.0-or-later
pragma solidity =0.8.9;

abstract contract ProtocolConstants {
    /* ========== GENERAL ========== */

    // The zero address, utility
    address internal constant _ZERO_ADDRESS = address(0);

    // One year, utility
    uint256 internal constant _ONE_YEAR = 365 days;

    // Basis Points
    uint256 internal constant _MAX_BASIS_POINTS = 100_00;

    /* ========== VADER TOKEN ========== */

    // Max VADER supply
    uint256 internal constant _INITIAL_VADER_SUPPLY = 25_000_000_000 * 1 ether;

    // Allocation for VETH holders
    uint256 internal constant _VETH_ALLOCATION = 7_500_000_000 * 1 ether;

    // Team allocation vested over {VESTING_DURATION} years
    uint256 internal constant _TEAM_ALLOCATION = 2_500_000_000 * 1 ether;

    // Ecosystem growth fund unlocked for partnerships & USDV provision
    uint256 internal constant _ECOSYSTEM_GROWTH = 2_500_000_000 * 1 ether;

    // Total grant tokens
    uint256 internal constant _GRANT_ALLOCATION = 12_500_000_000 * 1 ether;

    // Emission Era
    uint256 internal constant _EMISSION_ERA = 24 hours;

    // Initial Emission Curve, 5
    uint256 internal constant _INITIAL_EMISSION_CURVE = 5;

    // Fee Basis Points
    uint256 internal constant _MAX_FEE_BASIS_POINTS = 1_00;

    /* ========== VESTING ========== */

    // Vesting Duration
    uint256 internal constant _VESTING_DURATION = 2 * _ONE_YEAR;

    /* ========== CONVERTER ========== */

    // Vader -> Vether Conversion Rate (1000:1)
    uint256 internal constant _VADER_VETHER_CONVERSION_RATE = 10_000;

    // Burn Address
    address internal constant _BURN =
        0xdeaDDeADDEaDdeaDdEAddEADDEAdDeadDEADDEaD;

    /* ========== SWAP QUEUE ========== */

    // A minimum of 10 swaps will be executed per block
    uint256 internal constant _MIN_SWAPS_EXECUTED = 10;

    // Expressed in basis points (50%)
    uint256 internal constant _DEFAULT_SWAPS_EXECUTED = 50_00;

    // The queue size of each block is 100 units
    uint256 internal constant _QUEUE_SIZE = 100;

    /* ========== GAS QUEUE ========== */

    // Address of Chainlink Fast Gas Price Oracle
    address internal constant _FAST_GAS_ORACLE =
        0x169E633A2D1E6c10dD91238Ba11c4A708dfEF37C;

    /* ========== VADER RESERVE ========== */

    // Minimum delay between grants
    uint256 internal constant _GRANT_DELAY = 30 days;

    // Maximum grant size divisor
    uint256 internal constant _MAX_GRANT_BASIS_POINTS = 10_00;
}

// SPDX-License-Identifier: MIT AND AGPL-3.0-or-later
pragma solidity =0.8.9;

interface ILinearVesting {
    /* ========== STRUCTS ========== */

    // Struct of a vesting member, tight-packed to 256-bits
    struct Vester {
        uint192 amount;
        uint64 lastClaim;
        uint128 start;
        uint128 end;
    }

    /* ========== FUNCTIONS ========== */

    function getClaim(address _vester)
        external
        view
        returns (uint256 vestedAmount);

    function claim() external returns (uint256 vestedAmount);

    //    function claimConverted() external returns (uint256 vestedAmount);

    function begin(address[] calldata vesters, uint192[] calldata amounts)
        external;

    function vestFor(address user, uint256 amount) external;

    /* ========== EVENTS ========== */

    event VestingInitialized(uint256 duration);

    event VestingCreated(address user, uint256 amount);

    event Vested(address indexed from, uint256 amount);
}

// SPDX-License-Identifier: MIT

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

pragma solidity ^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 ^0.8.0;

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

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

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

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

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

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

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

    function _setOwner(address newOwner) private {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

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

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0000000000000000000000002602278ee1882889b946eb11dc0e8100756509830000000000000000000000006d4a43ee4770a2bab97460d3a3b783641d85d108

-----Decoded View---------------
Arg [0] : _vader (address): 0x2602278EE1882889B946eb11DC0E810075650983
Arg [1] : _converter (address): 0x6D4a43Ee4770a2Bab97460d3a3B783641D85d108

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 0000000000000000000000002602278ee1882889b946eb11dc0e810075650983
Arg [1] : 0000000000000000000000006d4a43ee4770a2bab97460d3a3b783641d85d108