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//SPDX-License-Identifier: MIT

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

// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;

/**
 * @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;
    }
}

// File: @openzeppelin/contracts/access/Ownable.sol

// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

/**
 * @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.
 *
 * The initial owner is set to the address provided by the deployer. 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;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

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

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @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 {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @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 {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _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);
    }
}

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

// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC-20 standard as defined in the ERC.
 */
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 value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

    /**
     * @dev Moves a `value` amount of 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 value) 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 a `value` amount of tokens 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 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` 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 value
    ) external returns (bool);
}

// File: ARY/HardStake.sol

pragma solidity ^0.8.0;

interface ISwapPro {
    function userVolume(address user) external view returns (uint256);
}

contract Staking is Ownable {
    IERC20 public aryToken;
    ISwapPro public swapProContract;
    address public feeReceiver;
    uint256 public depositFeeCRO = 1 ether; // 1 CRO fee for deposits
    uint256 public constant FEE_PERCENTAGE = 300; // 0.3% fee in basis points
    uint256 public constant CLAIM_PERCENTAGE = 50; // 50% of fee returned to staker
    uint256 public constant WITHDRAWAL_LOCK_PERIOD = 5 days;
    uint256 public constant IMMEDIATE_WITHDRAWAL_FEE_PERCENTAGE = 12; // 12% immediate

    uint256 public totalStaked;

    struct Staker {
        uint256 stakedAmount;
        uint256 lastClaimedVolume;
        uint256 withdrawalRequestTime;
        bool exists;
    }

    mapping(address => Staker) public stakers;
    address[] public stakerList;

    event Staked(address indexed user, uint256 amount);
    event Unstaked(address indexed user, uint256 amount);
    event FeesClaimed(address indexed user, uint256 reward);
    event WithdrawalRequested(address indexed user);
    event ImmediateWithdrawal(
        address indexed user,
        uint256 amount,
        uint256 fee
    );
    event EmergencyWithdrawal(address indexed owner, uint256 amount);

    constructor(
        address _aryToken,
        address _swapProContract,
        address _feeReceiver
    ) Ownable(msg.sender) {
        aryToken = IERC20(_aryToken);
        swapProContract = ISwapPro(_swapProContract);
        feeReceiver = _feeReceiver;
    }

    modifier onlySwapPro() {
        require(
            msg.sender == address(swapProContract),
            "Unauthorized: Only SwapPro can call"
        );
        _;
    }

    function setSwapProContract(address _swapProContract) external onlyOwner {
        swapProContract = ISwapPro(_swapProContract);
    }

    function stake(uint256 amount) external payable {
        require(amount > 0, "Staking amount must be positive");
        require(
            msg.value == depositFeeCRO,
            "A deposit fee of 1 CRO is required"
        );

        uint256 userVolume = swapProContract.userVolume(msg.sender);
        uint256 maxStakableAmount = userVolume / 100; // 1% of volume
        require(
            amount + stakers[msg.sender].stakedAmount <= maxStakableAmount,
            "Cannot stake more than 1% of your volume"
        );

        aryToken.transferFrom(msg.sender, address(this), amount);

        if (!stakers[msg.sender].exists) {
            stakers[msg.sender].exists = true;
            stakerList.push(msg.sender);
        }

        stakers[msg.sender].stakedAmount += amount;
        totalStaked += amount;

        // Initialize lastClaimedVolume if first time staking
        if (stakers[msg.sender].lastClaimedVolume == 0) {
            stakers[msg.sender].lastClaimedVolume = userVolume;
        }

        emit Staked(msg.sender, amount);
    }

    function claimFees() external {
        Staker storage staker = stakers[msg.sender];
        require(staker.stakedAmount > 0, "No staked amount");

        uint256 currentVolume = swapProContract.userVolume(msg.sender);
        require(
            currentVolume > staker.lastClaimedVolume,
            "No new volume since last claim"
        );

        uint256 newVolume = currentVolume - staker.lastClaimedVolume;
        uint256 feeIncurred = (newVolume * FEE_PERCENTAGE) / 100000; // Calculate 0.3% fee
        uint256 reward = (feeIncurred * CLAIM_PERCENTAGE) / 100; // 50% to user

        require(reward > 0, "No fees to claim");

        staker.lastClaimedVolume = currentVolume;

        aryToken.transfer(msg.sender, reward);

        emit FeesClaimed(msg.sender, reward);
    }

    function requestWithdrawal() external {
        Staker storage staker = stakers[msg.sender];
        require(staker.stakedAmount > 0, "No staked amount to withdraw");
        require(
            staker.withdrawalRequestTime == 0,
            "Withdrawal already requested"
        );

        staker.withdrawalRequestTime = block.timestamp;

        emit WithdrawalRequested(msg.sender);
    }

    function withdraw() external {
        Staker storage staker = stakers[msg.sender];
        require(staker.stakedAmount > 0, "No staked amount to withdraw");
        require(staker.withdrawalRequestTime > 0, "No withdrawal requested");
        require(
            block.timestamp >=
                staker.withdrawalRequestTime + WITHDRAWAL_LOCK_PERIOD,
            "Withdrawal not yet unlocked"
        );

        uint256 amount = staker.stakedAmount;
        staker.stakedAmount = 0;
        staker.withdrawalRequestTime = 0;

        totalStaked -= amount;

        aryToken.transfer(msg.sender, amount);

        emit Unstaked(msg.sender, amount);
    }

    function immediateWithdraw() external {
        Staker storage staker = stakers[msg.sender];
        require(staker.stakedAmount > 0, "No staked amount to withdraw");

        uint256 amount = staker.stakedAmount;
        uint256 fee = (amount * IMMEDIATE_WITHDRAWAL_FEE_PERCENTAGE) / 100;
        uint256 netAmount = amount - fee;

        staker.stakedAmount = 0;
        staker.withdrawalRequestTime = 0;

        totalStaked -= amount;

        aryToken.transfer(msg.sender, netAmount);
        aryToken.transfer(feeReceiver, fee);

        emit ImmediateWithdrawal(msg.sender, amount, fee);
    }

    function clearVolume() external {
        require(msg.sender == address(swapProContract), "Unauthorized");

        for (uint256 i = 0; i < stakerList.length; i++) {
            address stakerAddr = stakerList[i];
            Staker storage staker = stakers[stakerAddr];

            uint256 amount = staker.stakedAmount;
            if (amount > 0) {
                staker.stakedAmount = 0;
                staker.lastClaimedVolume = 0;
                staker.withdrawalRequestTime = 0;

                totalStaked -= amount;

                aryToken.transfer(stakerAddr, amount);

                emit Unstaked(stakerAddr, amount);
            }
        }
    }

    function getTotalStaked() external view returns (uint256) {
        return totalStaked;
    }

    function emergencyWithdrawRewards(uint256 amount) external onlyOwner {
        uint256 contractBalance = aryToken.balanceOf(address(this));
        require(
            amount <= contractBalance - totalStaked,
            "Insufficient reward balance"
        );

        aryToken.transfer(owner(), amount);

        emit EmergencyWithdrawal(owner(), amount);
    }

    function ownerWithdrawCRO() external onlyOwner {
        uint256 contractBalance = address(this).balance;
        require(contractBalance > 0, "No CRO available to withdraw");

        payable(owner()).transfer(contractBalance);
    }

    function setFeeReceiver(address _feeReceiver) external onlyOwner {
        feeReceiver = _feeReceiver;
    }

    receive() external payable {}

    function getUserVolume(address user) public view returns (uint256) {
        return ISwapPro(swapProContract).userVolume(user);
    }

    function getAllStakers() public view returns (address[] memory) {
        return stakerList;
    }
}

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

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00000000000000000000000041bc026dabe978bc2fafea1850456511ca4b01bc000000000000000000000000d59c64b327db1013c7c325876d4772df258413fe00000000000000000000000039d49f9f17f114b70c1d0c0650a73e8263479fa3

-----Decoded View---------------
Arg [0] : _aryToken (address): 0x41bc026dABe978bc2FAfeA1850456511ca4B01bc
Arg [1] : _swapProContract (address): 0xd59c64b327DB1013c7c325876d4772df258413Fe
Arg [2] : _feeReceiver (address): 0x39d49f9F17f114b70c1d0c0650a73e8263479fA3

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 00000000000000000000000041bc026dabe978bc2fafea1850456511ca4b01bc
Arg [1] : 000000000000000000000000d59c64b327db1013c7c325876d4772df258413fe
Arg [2] : 00000000000000000000000039d49f9f17f114b70c1d0c0650a73e8263479fa3