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// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.22;

import {Ownable2Step} from "@openzeppelin/contracts/access/Ownable2Step.sol";
import {Pausable} from "@openzeppelin/contracts/security/Pausable.sol";
import {ReentrancyGuard} from "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {IArc} from "./interfaces/IArc.sol";
import {IERC721Receiver} from "./interfaces/IERC721Receiver.sol";
import {IVotingEscrow} from "./interfaces/IVotingEscrow.sol";

contract veArcSplitter is Ownable2Step, Pausable, ReentrancyGuard, IERC721Receiver {
    
    IArc public arc;
    IVotingEscrow public veArc;
    
    event VeArcSplit(address indexed owner, uint originalTokenId, uint originalLockedAmount, uint veArc1TokenId, uint veArc1Amount, uint veArc2TokenId, uint veArc2Amount);
    event VeArcReceived(address indexed operator, address indexed from, uint tokenId, bytes data);
    
    constructor(address _arc, address _veArc) {
        require(_arc != address(0) && _veArc != address(0), 'Zero address passed in constructor');
        
        arc = IArc(_arc);
        veArc = IVotingEscrow(_veArc);
        
        _transferOwnership(0x82d3c9246890e672BA4Dfbf2038c791727BCB34A);
    }
    
    function pause() public onlyOwner
    {
        _pause();
    }
    
    function unpause() public onlyOwner
    {
        _unpause();
    }
    
    function setTokens(address _arc, address _veArc) public onlyOwner {
        require(_arc != address(0) && _veArc != address(0), 'Cannot set Arc or veArc to zero address');
        
        arc = IArc(_arc);
        veArc = IVotingEscrow(_veArc);
    }
    
    function withdrawNative(address beneficiary) public onlyOwner {
        uint256 amount = address(this).balance;
        (bool sent, ) = beneficiary.call{value: amount}("");
        require(sent, 'Unable to withdraw');
    }

    function withdrawToken(address beneficiary, address token) public onlyOwner {
        uint256 amount = IERC20(token).balanceOf(address(this));
        IERC20(token).transfer(beneficiary, amount);
    }
    
    function splitVeArc(uint tokenId, uint veArc2Amount) public nonReentrant whenNotPaused {
        require(msg.sender == veArc.ownerOf(tokenId), 'Not owner of veArc');
        require(veArc2Amount > 0, 'New veArc amount must be greater than zero');
        
        uint lockedAmount = veArc.locked__amount(tokenId);
        uint lockedEnd = veArc.locked__end(tokenId);
        uint veArcLockDuration = lockedEnd - block.timestamp;
        
        require((lockedAmount - 1) >= veArc2Amount, 'New veArc amount must be less than original veArc');
        uint veArc1Amount = lockedAmount - veArc2Amount;
        
        veArc.safeTransferFrom(msg.sender, address(this), tokenId);
        veArc.burn(tokenId);
        
        arc.mint(address(this), lockedAmount);
        arc.approve(address(veArc), lockedAmount);
        uint veArc1TokenId = veArc.create_lock_for(veArc1Amount, veArcLockDuration, msg.sender);
        uint veArc2TokenId = veArc.create_lock_for(veArc2Amount, veArcLockDuration, msg.sender);
        emit VeArcSplit(msg.sender, tokenId, lockedAmount, veArc1TokenId, veArc1Amount, veArc2TokenId, veArc2Amount);
    }
    
    function onERC721Received(address operator, address from, uint tokenId, bytes calldata data) external returns (bytes4) {
        emit VeArcReceived(operator, from, tokenId, data);
        return this.onERC721Received.selector;
    }
}

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

pragma solidity ^0.8.0;

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

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

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

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

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

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

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

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

pragma solidity ^0.8.0;

import "./Ownable.sol";

/**
 * @dev Contract module which provides access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership} and {acceptOwnership}.
 *
 * This module is used through inheritance. It will make available all functions
 * from parent (Ownable).
 */
abstract contract Ownable2Step is Ownable {
    address private _pendingOwner;

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (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 Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

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

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        require(!paused(), "Pausable: paused");
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        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());
    }
}

// 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 (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (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;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.22;

interface IArc {
    function approve(address _spender, uint _value) external returns (bool);
    function balanceOf(address account) external returns (uint);
    function mint(address account, uint amount) external returns (bool);
    function burn(uint amount) external;
    function transfer(address, uint) external returns (bool);
    function transferFrom(address _from, address _to, uint _value) external;
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.22;

/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
    /**
    * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
    * by `operator` from `from`, this function is called.
    *
    * It must return its Solidity selector to confirm the token transfer.
    * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
    *
    * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
    */
    function onERC721Received(
        address operator,
        address from,
        uint tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.22;

interface IVotingEscrow {

    struct Point {
        int128 bias;
        int128 slope; // # -dweight / dt
        uint256 ts;
        uint256 blk; // block
    }

    function user_point_epoch(uint tokenId) external view returns (uint);
    function epoch() external view returns (uint);
    function user_point_history(uint tokenId, uint loc) external view returns (Point memory);
    function point_history(uint loc) external view returns (Point memory);
    function checkpoint() external;
    function deposit_for(uint tokenId, uint value) external;
    function token() external view returns (address);
    function user_point_history__ts(uint tokenId, uint idx) external view returns (uint);
    function locked__end(uint _tokenId) external view returns (uint);
    function locked__amount(uint _tokenId) external view returns (uint);
    function approve(address spender, uint tokenId) external;
    function balanceOfNFT(uint) external view returns (uint);
    function isApprovedOrOwner(address, uint) external view returns (bool);
    function ownerOf(uint) external view returns (address);
    function transferFrom(address, address, uint) external;
    function totalSupply() external view returns (uint);
    function supply() external view returns (uint);
    function create_lock_for(uint, uint, address) external returns (uint);
    function lockVote(uint tokenId) external;
    function isVoteExpired(uint tokenId) external view returns (bool);
    function voteExpiry(uint _tokenId) external view returns (uint);
    function attach(uint tokenId) external;
    function detach(uint tokenId) external;
    function voting(uint tokenId) external;
    function abstain(uint tokenId) external;
    function voted(uint tokenId) external view returns (bool);
    function withdraw(uint tokenId) external;
    function create_lock(uint value, uint duration) external returns (uint);
    function setVoter(address voter) external;
    function balanceOf(address owner) external view returns (uint);
    function safeTransferFrom(address from, address to, uint tokenId) external;
    function burn(uint _tokenId) external;
    function setAdmin(address _admin) external;
    function setArtProxy(address _proxy) external;
}

{
  "evmVersion": "paris",
  "optimizer": {
    "enabled": true,
    "runs": 10000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

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000000000000000000000000e8876189a80b2079d8c0a7867e46c50361d972c10000000000000000000000006aca098fa93dad7a872f6dcb989f8b4a3afc3342

-----Decoded View---------------
Arg [0] : _arc (address): 0xe8876189A80B2079D8C0a7867e46c50361D972c1
Arg [1] : _veArc (address): 0x6ACa098fa93DAD7A872F6dcb989F8b4A3aFC3342

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000e8876189a80b2079d8c0a7867e46c50361d972c1
Arg [1] : 0000000000000000000000006aca098fa93dad7a872f6dcb989f8b4a3afc3342