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

// Inheritance
import "./RangedPosition.sol";

contract RangedPositionMastercopy is RangedPosition {
    constructor() {
        // Freeze mastercopy on deployment so it can never be initialized with real arguments
        initialized = true;
    }
}

// in position collaterized by 0.5 UP on the left leg and 0.5 DOWN on the right leg

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

// Inheritance
import "@openzeppelin/contracts-4.4.1/token/ERC20/IERC20.sol";
import "../interfaces/IPosition.sol";

// Internal references
import "./RangedMarket.sol";

contract RangedPosition is IERC20 {
    /* ========== STATE VARIABLES ========== */

    string public name;
    string public symbol;
    uint8 public constant decimals = 18;

    RangedMarket public rangedMarket;

    mapping(address => uint) public override balanceOf;
    uint public override totalSupply;

    // The argument order is allowance[owner][spender]
    mapping(address => mapping(address => uint)) private allowances;

    // Enforce a 1 cent minimum amount
    uint internal constant _MINIMUM_AMOUNT = 1e16;

    address public thalesRangedAMM;
    /* ========== CONSTRUCTOR ========== */

    bool public initialized = false;

    function initialize(
        address market,
        string calldata _name,
        string calldata _symbol,
        address _thalesRangedAMM
    ) external {
        require(!initialized, "Ranged Market already initialized");
        initialized = true;
        rangedMarket = RangedMarket(market);
        name = _name;
        symbol = _symbol;
        // add through constructor
        thalesRangedAMM = _thalesRangedAMM;
    }

    function allowance(address owner, address spender) external view override returns (uint256) {
        if (spender == thalesRangedAMM) {
            return type(uint256).max;
        } else {
            return allowances[owner][spender];
        }
    }

    function burn(address claimant, uint amount) external onlyRangedMarket {
        balanceOf[claimant] = balanceOf[claimant] - amount;
        totalSupply = totalSupply - amount;
        emit Burned(claimant, amount);
        emit Transfer(claimant, address(0), amount);
    }

    function mint(address minter, uint amount) external onlyRangedMarket {
        _requireMinimumAmount(amount);
        totalSupply = totalSupply + amount;
        balanceOf[minter] = balanceOf[minter] + amount; // Increment rather than assigning since a transfer may have occurred.
        emit Mint(minter, amount);
        emit Transfer(address(0), minter, amount);
    }

    /* ---------- ERC20 Functions ---------- */

    function _transfer(
        address _from,
        address _to,
        uint _value
    ) internal returns (bool success) {
        require(_to != address(0) && _to != address(this), "Invalid address");

        uint fromBalance = balanceOf[_from];
        require(_value <= fromBalance, "Insufficient balance");

        balanceOf[_from] = fromBalance - _value;
        balanceOf[_to] = balanceOf[_to] + _value;

        emit Transfer(_from, _to, _value);
        return true;
    }

    function transfer(address _to, uint _value) external override returns (bool success) {
        return _transfer(msg.sender, _to, _value);
    }

    function transferFrom(
        address _from,
        address _to,
        uint _value
    ) external override returns (bool success) {
        if (msg.sender != thalesRangedAMM) {
            uint fromAllowance = allowances[_from][msg.sender];
            require(_value <= fromAllowance, "Insufficient allowance");
            allowances[_from][msg.sender] = fromAllowance - _value;
        }
        return _transfer(_from, _to, _value);
    }

    function approve(address _spender, uint _value) external override returns (bool success) {
        require(_spender != address(0));
        allowances[msg.sender][_spender] = _value;
        emit Approval(msg.sender, _spender, _value);
        return true;
    }

    function getBalanceOf(address account) external view returns (uint) {
        return balanceOf[account];
    }

    function getTotalSupply() external view returns (uint) {
        return totalSupply;
    }

    modifier onlyRangedMarket {
        require(msg.sender == address(rangedMarket), "only the Ranged Market may perform these methods");
        _;
    }

    function _requireMinimumAmount(uint amount) internal pure returns (uint) {
        require(amount >= _MINIMUM_AMOUNT || amount == 0, "Balance < $0.01");
        return amount;
    }

    event Mint(address minter, uint amount);
    event Burned(address burner, uint amount);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol)

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 >=0.5.16;

import "./IPositionalMarket.sol";

interface IPosition {
    /* ========== VIEWS / VARIABLES ========== */

    function getBalanceOf(address account) external view returns (uint);

    function getTotalSupply() external view returns (uint);

}

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

import "@openzeppelin/contracts-4.4.1/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts-4.4.1/token/ERC20/utils/SafeERC20.sol";

// Internal references
import "./RangedPosition.sol";
import "./RangedMarketsAMM.sol";
import "../interfaces/IPositionalMarket.sol";
import "../interfaces/IPositionalMarketManager.sol";

contract RangedMarket {
    using SafeERC20 for IERC20;

    enum Position {In, Out}

    IPositionalMarket public leftMarket;
    IPositionalMarket public rightMarket;

    struct Positions {
        RangedPosition inp;
        RangedPosition outp;
    }

    Positions public positions;

    RangedMarketsAMM public rangedMarketsAMM;

    bool public resolved = false;

    uint finalPrice;

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

    bool public initialized = false;

    function initialize(
        address _leftMarket,
        address _rightMarket,
        address _in,
        address _out,
        address _rangedMarketsAMM
    ) external {
        require(!initialized, "Ranged Market already initialized");
        initialized = true;
        leftMarket = IPositionalMarket(_leftMarket);
        rightMarket = IPositionalMarket(_rightMarket);
        positions.inp = RangedPosition(_in);
        positions.outp = RangedPosition(_out);
        rangedMarketsAMM = RangedMarketsAMM(_rangedMarketsAMM);
    }

    function mint(
        uint value,
        Position _position,
        address minter
    ) external onlyAMM {
        if (value == 0) {
            return;
        }
        _mint(minter, value, _position);
    }

    function _mint(
        address minter,
        uint amount,
        Position _position
    ) internal {
        if (_position == Position.In) {
            positions.inp.mint(minter, amount);
        } else {
            positions.outp.mint(minter, amount);
        }
        emit Mint(minter, amount, _position);
    }

    function burnIn(uint value, address claimant) external onlyAMM {
        if (value == 0) {
            return;
        }
        (IPosition up, ) = IPositionalMarket(leftMarket).getOptions();
        IERC20(address(up)).safeTransfer(msg.sender, value / 2);

        (, IPosition down1) = IPositionalMarket(rightMarket).getOptions();
        IERC20(address(down1)).safeTransfer(msg.sender, value / 2);

        positions.inp.burn(claimant, value);
    }

    function burnOut(uint value, address claimant) external onlyAMM {
        if (value == 0) {
            return;
        }
        (, IPosition down) = IPositionalMarket(leftMarket).getOptions();
        IERC20(address(down)).safeTransfer(msg.sender, value);

        (IPosition up1, ) = IPositionalMarket(rightMarket).getOptions();
        IERC20(address(up1)).safeTransfer(msg.sender, value);

        positions.outp.burn(claimant, value);
    }

    function _burn(
        uint value,
        Position _position,
        address claimant
    ) private {
        if (value == 0) {
            return;
        }
        if (_position == Position.Out) {
            (, IPosition down) = IPositionalMarket(leftMarket).getOptions();
            IERC20(address(down)).safeTransfer(msg.sender, value);

            (IPosition up1, ) = IPositionalMarket(rightMarket).getOptions();
            IERC20(address(up1)).safeTransfer(msg.sender, value);

            positions.outp.burn(claimant, value);
        } else {
            (IPosition up, ) = IPositionalMarket(leftMarket).getOptions();
            IERC20(address(up)).safeTransfer(msg.sender, value / 2);

            (, IPosition down1) = IPositionalMarket(rightMarket).getOptions();
            IERC20(address(down1)).safeTransfer(msg.sender, value / 2);

            positions.inp.burn(claimant, value);
        }
        emit Burn(claimant, value, _position);
    }

    function canExercisePositions() external view returns (bool) {
        if (!leftMarket.resolved() && !leftMarket.canResolve()) {
            return false;
        }
        if (!rightMarket.resolved() && !rightMarket.canResolve()) {
            return false;
        }

        uint inBalance = positions.inp.balanceOf(msg.sender);
        uint outBalance = positions.outp.balanceOf(msg.sender);

        if (inBalance == 0 && outBalance == 0) {
            return false;
        }

        return true;
    }

    function exercisePositions() external {
        if (leftMarket.canResolve()) {
            IPositionalMarketManager(rangedMarketsAMM.thalesAmm().manager()).resolveMarket(address(leftMarket));
        }
        if (rightMarket.canResolve()) {
            IPositionalMarketManager(rangedMarketsAMM.thalesAmm().manager()).resolveMarket(address(rightMarket));
        }
        require(leftMarket.resolved() && rightMarket.resolved(), "Left or Right market not resolved yet!");

        uint inBalance = positions.inp.balanceOf(msg.sender);
        uint outBalance = positions.outp.balanceOf(msg.sender);

        require(inBalance != 0 || outBalance != 0, "Nothing to exercise");

        if (!resolved) {
            resolveMarket();
        }

        // Each option only needs to be exercised if the account holds any of it.
        if (inBalance != 0) {
            positions.inp.burn(msg.sender, inBalance);
        }
        if (outBalance != 0) {
            positions.outp.burn(msg.sender, outBalance);
        }

        Position result = Position.Out;
        if ((leftMarket.result() == IPositionalMarket.Side.Up) && (rightMarket.result() == IPositionalMarket.Side.Down)) {
            result = Position.In;
        }

        // Only pay out the side that won.
        uint payout = (result == Position.In) ? inBalance : outBalance;
        if (payout != 0) {
            rangedMarketsAMM.transferSusdTo(msg.sender, payout);
        }
        emit Exercised(msg.sender, payout, result);
    }

    function canResolve() external view returns (bool) {
        // The markets must be resolved
        if (!leftMarket.resolved() && !leftMarket.canResolve()) {
            return false;
        }
        if (!rightMarket.resolved() && !rightMarket.canResolve()) {
            return false;
        }

        return !resolved;
    }

    function resolveMarket() public {
        // The markets must be resolved
        if (leftMarket.canResolve()) {
            IPositionalMarketManager(rangedMarketsAMM.thalesAmm().manager()).resolveMarket(address(leftMarket));
        }
        if (rightMarket.canResolve()) {
            IPositionalMarketManager(rangedMarketsAMM.thalesAmm().manager()).resolveMarket(address(rightMarket));
        }
        require(leftMarket.resolved() && rightMarket.resolved(), "Left or Right market not resolved yet!");
        require(!resolved, "Already resolved!");

        if (positions.inp.totalSupply() > 0 || positions.outp.totalSupply() > 0) {
            leftMarket.exerciseOptions();
            rightMarket.exerciseOptions();
        }
        resolved = true;

        if (rangedMarketsAMM.sUSD().balanceOf(address(this)) > 0) {
            rangedMarketsAMM.sUSD().transfer(address(rangedMarketsAMM), rangedMarketsAMM.sUSD().balanceOf(address(this)));
        }

        (, , uint _finalPrice) = leftMarket.getOracleDetails();
        finalPrice = _finalPrice;
        emit Resolved(result(), finalPrice);
    }

    function result() public view returns (Position) {
        Position result = Position.Out;
        if ((leftMarket.result() == IPositionalMarket.Side.Up) && (rightMarket.result() == IPositionalMarket.Side.Down)) {
            result = Position.In;
        }
        return result;
    }

    function withdrawCollateral(address recipient) external onlyAMM {
        rangedMarketsAMM.sUSD().transfer(recipient, rangedMarketsAMM.sUSD().balanceOf(address(this)));
    }

    modifier onlyAMM {
        require(msg.sender == address(rangedMarketsAMM), "only the AMM may perform these methods");
        _;
    }

    event Mint(address minter, uint amount, Position _position);
    event Burn(address burner, uint amount, Position _position);
    event Exercised(address exerciser, uint amount, Position _position);
    event Resolved(Position winningPosition, uint finalPrice);
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.5.16;

import "../interfaces/IPositionalMarketManager.sol";
import "../interfaces/IPosition.sol";
import "../interfaces/IPriceFeed.sol";

interface IPositionalMarket {
    /* ========== TYPES ========== */

    enum Phase {Trading, Maturity, Expiry}
    enum Side {Up, Down}

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

    function getOptions() external view returns (IPosition up, IPosition down);

    function times() external view returns (uint maturity, uint destructino);

    function getOracleDetails()
        external
        view
        returns (
            bytes32 key,
            uint strikePrice,
            uint finalPrice
        );

    function fees() external view returns (uint poolFee, uint creatorFee);

    function deposited() external view returns (uint);

    function creator() external view returns (address);

    function resolved() external view returns (bool);

    function phase() external view returns (Phase);

    function oraclePrice() external view returns (uint);

    function oraclePriceAndTimestamp() external view returns (uint price, uint updatedAt);

    function canResolve() external view returns (bool);

    function result() external view returns (Side);

    function balancesOf(address account) external view returns (uint up, uint down);

    function totalSupplies() external view returns (uint up, uint down);

    function getMaximumBurnable(address account) external view returns (uint amount);

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

    function mint(uint value) external;

    function exerciseOptions() external returns (uint);

    function burnOptions(uint amount) external;

    function burnOptionsMaximum() external;
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.5.16;

import "../interfaces/IPositionalMarket.sol";

interface IPositionalMarketManager {
    /* ========== VIEWS / VARIABLES ========== */

    function durations() external view returns (uint expiryDuration, uint maxTimeToMaturity);

    function capitalRequirement() external view returns (uint);

    function marketCreationEnabled() external view returns (bool);

    function transformCollateral(uint value) external view returns (uint);

    function reverseTransformCollateral(uint value) external view returns (uint);

    function totalDeposited() external view returns (uint);

    function numActiveMarkets() external view returns (uint);

    function activeMarkets(uint index, uint pageSize) external view returns (address[] memory);

    function numMaturedMarkets() external view returns (uint);

    function maturedMarkets(uint index, uint pageSize) external view returns (address[] memory);

    function isActiveMarket(address candidate) external view returns (bool);

    function isKnownMarket(address candidate) external view returns (bool);

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

    function createMarket(
        bytes32 oracleKey,
        uint strikePrice,
        uint maturity,
        uint initialMint, // initial sUSD to mint options for,
        bool customMarket,
        address customOracle
    ) external returns (IPositionalMarket);

    function resolveMarket(address market) external;

    function expireMarkets(address[] calldata market) external;

    function transferSusdTo(
        address sender,
        address receiver,
        uint amount
    ) external;
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.5.16;

interface IPriceFeed {
     // Structs
    struct RateAndUpdatedTime {
        uint216 rate;
        uint40 time;
    }
    
    // Mutative functions
    function addAggregator(bytes32 currencyKey, address aggregatorAddress) external;

    function removeAggregator(bytes32 currencyKey) external;

    // Views

    function rateForCurrency(bytes32 currencyKey) external view returns (uint);

    function rateAndUpdatedTime(bytes32 currencyKey) external view returns (uint rate, uint time);

    function getRates() external view returns (uint[] memory);

    function getCurrencies() external view returns (bytes32[] memory);
}

// 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");
        }
    }
}

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

// external
import "@openzeppelin/contracts-upgradeable/token/ERC20/utils/SafeERC20Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/math/MathUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts-upgradeable/utils/math/SafeMathUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/security/PausableUpgradeable.sol";
import "@openzeppelin/contracts-4.4.1/proxy/Clones.sol";

// interfaces
import "../interfaces/IPriceFeed.sol";
import "../interfaces/IThalesAMM.sol";

// internal
import "../utils/proxy/solidity-0.8.0/ProxyReentrancyGuard.sol";
import "../utils/proxy/solidity-0.8.0/ProxyOwned.sol";
import "../utils/proxy/solidity-0.8.0/ProxyPausable.sol";
import "../utils/libraries/AddressSetLib.sol";

import "./RangedPosition.sol";
import "./RangedPosition.sol";
import "./RangedMarket.sol";
import "../interfaces/IPositionalMarket.sol";
import "../interfaces/IStakingThales.sol";

contract RangedMarketsAMM is Initializable, ProxyOwned, ProxyPausable, ProxyReentrancyGuard {
    using AddressSetLib for AddressSetLib.AddressSet;
    using SafeERC20Upgradeable for IERC20Upgradeable;

    uint private constant ONE = 1e18;
    uint private constant ONE_PERCENT = 1e16;

    IThalesAMM public thalesAmm;

    uint public rangedAmmFee;

    mapping(address => mapping(address => address)) public createdRangedMarkets;
    AddressSetLib.AddressSet internal _knownMarkets;

    address public rangedMarketMastercopy;
    address public rangedPositionMastercopy;

    IERC20Upgradeable public sUSD;

    mapping(address => uint) public spentOnMarket;

    // IMPORTANT: AMM risks only half or the payout effectively, but it risks the whole amount on price movements
    uint public capPerMarket;

    uint public minSupportedPrice;
    uint public maxSupportedPrice;

    address public safeBox;
    uint public safeBoxImpact;

    uint public minimalDifBetweenStrikes;

    IStakingThales public stakingThales;

    uint public maximalDifBetweenStrikes;

    function initialize(
        address _owner,
        IThalesAMM _thalesAmm,
        uint _rangedAmmFee,
        uint _capPerMarket,
        IERC20Upgradeable _sUSD,
        address _safeBox,
        uint _safeBoxImpact
    ) public initializer {
        setOwner(_owner);
        initNonReentrant();
        thalesAmm = _thalesAmm;
        capPerMarket = _capPerMarket;
        rangedAmmFee = _rangedAmmFee;
        sUSD = _sUSD;
        safeBox = _safeBox;
        safeBoxImpact = _safeBoxImpact;

        sUSD.approve(address(thalesAmm), type(uint256).max);
    }

    function createRangedMarket(address leftMarket, address rightMarket) external nonReentrant notPaused {
        require(canCreateRangedMarket(leftMarket, rightMarket), "Can't create such a ranged market!");

        RangedMarket rm = RangedMarket(Clones.clone(rangedMarketMastercopy));
        createdRangedMarkets[leftMarket][rightMarket] = address(rm);

        RangedPosition inp = RangedPosition(Clones.clone(rangedPositionMastercopy));
        inp.initialize(address(rm), "Position IN", "IN", address(this));

        RangedPosition outp = RangedPosition(Clones.clone(rangedPositionMastercopy));
        outp.initialize(address(rm), "Position OUT", "OUT", address(this));

        rm.initialize(leftMarket, rightMarket, address(inp), address(outp), address(this));

        _knownMarkets.add(address(rm));

        emit RangedMarketCreated(address(rm), leftMarket, rightMarket);
    }

    function canCreateRangedMarket(address leftMarket, address rightMarket) public view returns (bool) {
        if (!thalesAmm.isMarketInAMMTrading(leftMarket) || !thalesAmm.isMarketInAMMTrading(rightMarket)) {
            return false;
        }
        (uint maturityLeft, ) = IPositionalMarket(leftMarket).times();
        (uint maturityRight, ) = IPositionalMarket(rightMarket).times();
        if (maturityLeft != maturityRight) {
            return false;
        }

        (bytes32 leftkey, uint leftstrikePrice, ) = IPositionalMarket(leftMarket).getOracleDetails();
        (bytes32 rightkey, uint rightstrikePrice, ) = IPositionalMarket(rightMarket).getOracleDetails();
        if (leftkey != rightkey) {
            return false;
        }
        if (leftstrikePrice >= rightstrikePrice) {
            return false;
        }

        if (!(((ONE + minimalDifBetweenStrikes * ONE_PERCENT) * leftstrikePrice) / ONE < rightstrikePrice)) {
            return false;
        }

        if (!(((ONE + maximalDifBetweenStrikes * ONE_PERCENT) * leftstrikePrice) / ONE > rightstrikePrice)) {
            return false;
        }

        if (createdRangedMarkets[leftMarket][rightMarket] != address(0)) {
            return false;
        }

        return true;
    }

    function _availableToBuyFromAMMOnlyRanged(RangedMarket rangedMarket, RangedMarket.Position position)
        internal
        view
        knownRangedMarket(address(rangedMarket))
        returns (uint)
    {
        if (position == RangedMarket.Position.Out) {
            return type(uint256).max;
        } else {
            return _availableToBuyFromAMMInOnlyRanged(rangedMarket);
        }
    }

    function availableToBuyFromAMM(RangedMarket rangedMarket, RangedMarket.Position position)
        public
        view
        knownRangedMarket(address(rangedMarket))
        returns (uint)
    {
        if (position == RangedMarket.Position.Out) {
            return _availableToBuyFromAMMOut(rangedMarket);
        } else {
            return _availableToBuyFromAMMIn(rangedMarket);
        }
    }

    function _availableToBuyFromAMMOut(RangedMarket rangedMarket) internal view returns (uint) {
        uint availableLeft = thalesAmm.availableToBuyFromAMM(address(rangedMarket.leftMarket()), IThalesAMM.Position.Down);
        uint availableRight = thalesAmm.availableToBuyFromAMM(address(rangedMarket.rightMarket()), IThalesAMM.Position.Up);
        return availableLeft < availableRight ? availableLeft : availableRight;
    }

    function _availableToBuyFromAMMIn(RangedMarket rangedMarket) internal view returns (uint) {
        uint availableLeft = thalesAmm.availableToBuyFromAMM(address(rangedMarket.leftMarket()), IThalesAMM.Position.Up);
        uint availableRight = thalesAmm.availableToBuyFromAMM(address(rangedMarket.rightMarket()), IThalesAMM.Position.Down);
        uint availableThalesAMM = (availableLeft < availableRight ? availableLeft : availableRight) * 2;
        uint availableRangedAmm = _availableToBuyFromAMMInOnlyRanged(rangedMarket);
        return availableThalesAMM > availableRangedAmm ? availableRangedAmm : availableThalesAMM;
    }

    function _availableToBuyFromAMMInOnlyRanged(RangedMarket rangedMarket) internal view returns (uint) {
        uint leftoverOnMarket = capPerMarket - spentOnMarket[address(rangedMarket)];
        uint minPrice = minInPrice(rangedMarket);
        if (minPrice <= minSupportedPrice || minPrice >= maxSupportedPrice) {
            return 0;
        }
        uint rangedAMMRisk = ONE - minInPrice(rangedMarket);
        uint availableRangedAmm = (leftoverOnMarket * ONE) / rangedAMMRisk;
        return availableRangedAmm;
    }

    function minInPrice(RangedMarket rangedMarket) public view knownRangedMarket(address(rangedMarket)) returns (uint) {
        uint leftQuote = thalesAmm.buyFromAmmQuote(address(rangedMarket.leftMarket()), IThalesAMM.Position.Up, ONE);
        uint rightQuote = thalesAmm.buyFromAmmQuote(address(rangedMarket.rightMarket()), IThalesAMM.Position.Down, ONE);
        uint quotedPrice = ((leftQuote + rightQuote) - ((ONE - leftQuote) + (ONE - rightQuote))) / 2;
        return quotedPrice;
    }

    function buyFromAmmQuote(
        RangedMarket rangedMarket,
        RangedMarket.Position position,
        uint amount
    ) public view knownRangedMarket(address(rangedMarket)) returns (uint) {
        (uint sUSDPaid, , ) = buyFromAmmQuoteDetailed(rangedMarket, position, amount);
        uint basePrice = (sUSDPaid * ONE) / amount;
        if (basePrice < minSupportedPrice || basePrice >= ONE) {
            return 0;
        }
        return sUSDPaid;
    }

    function buyFromAmmQuoteDetailed(
        RangedMarket rangedMarket,
        RangedMarket.Position position,
        uint amount
    )
        public
        view
        knownRangedMarket(address(rangedMarket))
        returns (
            uint,
            uint,
            uint
        )
    {
        if (position == RangedMarket.Position.Out) {
            uint leftQuote = thalesAmm.buyFromAmmQuote(address(rangedMarket.leftMarket()), IThalesAMM.Position.Down, amount);
            uint rightQuote = thalesAmm.buyFromAmmQuote(address(rangedMarket.rightMarket()), IThalesAMM.Position.Up, amount);
            uint quoteWithoutFees = leftQuote + rightQuote;
            uint quoteWithFees = (quoteWithoutFees * (rangedAmmFee + ONE)) / ONE;
            return (quoteWithFees, leftQuote, rightQuote);
        } else {
            uint leftQuote =
                thalesAmm.buyFromAmmQuote(address(rangedMarket.leftMarket()), IThalesAMM.Position.Up, amount / 2);
            uint rightQuote =
                thalesAmm.buyFromAmmQuote(address(rangedMarket.rightMarket()), IThalesAMM.Position.Down, amount / 2);
            uint quoteWithoutFees = ((leftQuote + rightQuote) - ((amount / 2 - leftQuote) + (amount / 2 - rightQuote)));
            uint quoteWithFees = (quoteWithoutFees * (rangedAmmFee + safeBoxImpact + ONE)) / ONE;
            return (quoteWithFees, leftQuote, rightQuote);
        }
    }

    function buyFromAMM(
        RangedMarket rangedMarket,
        RangedMarket.Position position,
        uint amount,
        uint expectedPayout,
        uint additionalSlippage
    ) public knownRangedMarket(address(rangedMarket)) nonReentrant notPaused {
        require(amount <= _availableToBuyFromAMMOnlyRanged(rangedMarket, position), "Not enough liquidity");

        (uint sUSDPaid, uint leftQuote, uint rightQuote) = buyFromAmmQuoteDetailed(rangedMarket, position, amount);

        uint basePrice = (sUSDPaid * ONE) / amount;
        require(basePrice > minSupportedPrice && basePrice < ONE, "Invalid price");
        require((sUSDPaid * ONE) / expectedPayout <= (ONE + additionalSlippage), "Slippage too high");

        sUSD.safeTransferFrom(msg.sender, address(this), sUSDPaid);

        address target;
        (RangedPosition inp, RangedPosition outp) = rangedMarket.positions();

        if (position == RangedMarket.Position.Out) {
            target = address(outp);

            _buyOUT(rangedMarket, amount, leftQuote, rightQuote, additionalSlippage);

            rangedMarket.mint(amount, RangedMarket.Position.Out, msg.sender);
        } else {
            target = address(inp);

            _buyIN(rangedMarket, amount, leftQuote, rightQuote, additionalSlippage);

            rangedMarket.mint(amount, RangedMarket.Position.In, msg.sender);
            _updateSpentOnMarketAndSafeBoxOnBuy(address(rangedMarket), amount, sUSDPaid);
        }
        if (address(stakingThales) != address(0)) {
            stakingThales.updateVolume(msg.sender, sUSDPaid);
        }
        emit BoughtFromAmm(msg.sender, address(rangedMarket), position, amount, sUSDPaid, address(sUSD), target);
    }

    function _buyOUT(
        RangedMarket rangedMarket,
        uint amount,
        uint leftQuote,
        uint rightQuote,
        uint additionalSlippage
    ) internal {
        thalesAmm.buyFromAMM(
            address(rangedMarket.leftMarket()),
            IThalesAMM.Position.Down,
            amount,
            leftQuote,
            additionalSlippage
        );

        thalesAmm.buyFromAMM(
            address(rangedMarket.rightMarket()),
            IThalesAMM.Position.Up,
            amount,
            rightQuote,
            additionalSlippage
        );
        (, IPosition down) = IPositionalMarket(rangedMarket.leftMarket()).getOptions();
        IERC20Upgradeable(address(down)).safeTransfer(address(rangedMarket), amount);

        (IPosition up1, ) = IPositionalMarket(rangedMarket.rightMarket()).getOptions();
        IERC20Upgradeable(address(up1)).safeTransfer(address(rangedMarket), amount);
    }

    function _buyIN(
        RangedMarket rangedMarket,
        uint amount,
        uint leftQuote,
        uint rightQuote,
        uint additionalSlippage
    ) internal {
        thalesAmm.buyFromAMM(
            address(rangedMarket.leftMarket()),
            IThalesAMM.Position.Up,
            amount / 2,
            leftQuote,
            additionalSlippage
        );

        thalesAmm.buyFromAMM(
            address(rangedMarket.rightMarket()),
            IThalesAMM.Position.Down,
            amount / 2,
            rightQuote,
            additionalSlippage
        );
        (IPosition up, ) = IPositionalMarket(rangedMarket.leftMarket()).getOptions();
        IERC20Upgradeable(address(up)).safeTransfer(address(rangedMarket), amount / 2);

        (, IPosition down1) = IPositionalMarket(rangedMarket.rightMarket()).getOptions();
        IERC20Upgradeable(address(down1)).safeTransfer(address(rangedMarket), amount / 2);
    }

    function _updateSpentOnMarketAndSafeBoxOnBuy(
        address rangedMarket,
        uint amount,
        uint sUSDPaid
    ) internal {
        uint safeBoxShare = sUSDPaid - ((sUSDPaid * ONE) / (ONE + safeBoxImpact));
        if (safeBoxImpact > 0) {
            sUSD.transfer(safeBox, safeBoxShare);
        } else {
            safeBoxShare = 0;
        }

        spentOnMarket[rangedMarket] = spentOnMarket[rangedMarket] + amount + safeBoxShare - sUSDPaid;
    }

    function availableToSellToAMM(RangedMarket rangedMarket, RangedMarket.Position position)
        public
        view
        knownRangedMarket(address(rangedMarket))
        returns (uint)
    {
        if (position == RangedMarket.Position.Out) {
            uint availableLeft =
                thalesAmm.availableToSellToAMM(address(rangedMarket.leftMarket()), IThalesAMM.Position.Down);
            uint availableRight =
                thalesAmm.availableToSellToAMM(address(rangedMarket.rightMarket()), IThalesAMM.Position.Up);
            return availableLeft < availableRight ? availableLeft : availableRight;
        } else {
            uint availableLeft = thalesAmm.availableToSellToAMM(address(rangedMarket.leftMarket()), IThalesAMM.Position.Up);
            uint availableRight =
                thalesAmm.availableToSellToAMM(address(rangedMarket.rightMarket()), IThalesAMM.Position.Down);
            uint min = availableLeft < availableRight ? availableLeft : availableRight;
            return min * 2;
        }
    }

    function sellToAmmQuote(
        RangedMarket rangedMarket,
        RangedMarket.Position position,
        uint amount
    ) public view knownRangedMarket(address(rangedMarket)) returns (uint) {
        (uint pricePaid, , ) = sellToAmmQuoteDetailed(rangedMarket, position, amount);
        return pricePaid;
    }

    function sellToAmmQuoteDetailed(
        RangedMarket rangedMarket,
        RangedMarket.Position position,
        uint amount
    )
        public
        view
        knownRangedMarket(address(rangedMarket))
        returns (
            uint,
            uint,
            uint
        )
    {
        if (position == RangedMarket.Position.Out) {
            uint leftQuote = thalesAmm.sellToAmmQuote(address(rangedMarket.leftMarket()), IThalesAMM.Position.Down, amount);
            uint rightQuote = thalesAmm.sellToAmmQuote(address(rangedMarket.rightMarket()), IThalesAMM.Position.Up, amount);
            uint quoteWithoutFees = leftQuote + rightQuote;
            uint quoteWithFees = (quoteWithoutFees * (ONE - rangedAmmFee)) / ONE;
            return (quoteWithFees, leftQuote, rightQuote);
        } else {
            uint leftQuote =
                thalesAmm.sellToAmmQuote(address(rangedMarket.leftMarket()), IThalesAMM.Position.Up, amount / 2);
            uint rightQuote =
                thalesAmm.sellToAmmQuote(address(rangedMarket.rightMarket()), IThalesAMM.Position.Down, amount / 2);
            uint quoteWithoutFees = ((leftQuote + rightQuote) - ((amount / 2 - leftQuote) + (amount / 2 - rightQuote)));
            uint quoteWithFees = (quoteWithoutFees * (ONE - rangedAmmFee - safeBoxImpact)) / ONE;
            return (quoteWithFees, leftQuote, rightQuote);
        }
    }

    function sellToAMM(
        RangedMarket rangedMarket,
        RangedMarket.Position position,
        uint amount,
        uint expectedPayout,
        uint additionalSlippage
    ) public knownRangedMarket(address(rangedMarket)) nonReentrant notPaused {
        uint availableToSellToAMMATM = availableToSellToAMM(rangedMarket, position);
        require(availableToSellToAMMATM > 0 && amount <= availableToSellToAMMATM, "Not enough liquidity.");

        (uint pricePaid, uint leftQuote, uint rightQuote) = sellToAmmQuoteDetailed(rangedMarket, position, amount);
        require((expectedPayout * ONE) / pricePaid <= (ONE + additionalSlippage), "Slippage too high");

        address target;
        (RangedPosition inp, RangedPosition outp) = rangedMarket.positions();

        if (position == RangedMarket.Position.Out) {
            target = address(outp);
            rangedMarket.burnOut(amount, msg.sender);
            _sellOUT(rangedMarket, amount, leftQuote, rightQuote, additionalSlippage);
        } else {
            target = address(inp);
            rangedMarket.burnIn(amount, msg.sender);

            _sellIN(rangedMarket, amount, leftQuote, rightQuote, additionalSlippage);

            _updateSpentOnMarketAndSafeBoxOnSell(amount, rangedMarket, pricePaid);
        }

        sUSD.safeTransfer(msg.sender, pricePaid);

        if (address(stakingThales) != address(0)) {
            stakingThales.updateVolume(msg.sender, pricePaid);
        }

        emit SoldToAMM(msg.sender, address(rangedMarket), position, amount, pricePaid, address(sUSD), target);
    }

    function _sellOUT(
        RangedMarket rangedMarket,
        uint amount,
        uint leftQuote,
        uint rightQuote,
        uint additionalSlippage
    ) internal {
        //TODO: remove this after Positional Market have the correct AMM address
        (, IPosition down) = IPositionalMarket(rangedMarket.leftMarket()).getOptions();
        (IPosition up, ) = IPositionalMarket(rangedMarket.rightMarket()).getOptions();
        IERC20Upgradeable(address(down)).approve(address(thalesAmm), type(uint256).max);
        IERC20Upgradeable(address(up)).approve(address(thalesAmm), type(uint256).max);
        //TODO: to here

        thalesAmm.sellToAMM(
            address(rangedMarket.leftMarket()),
            IThalesAMM.Position.Down,
            amount,
            leftQuote,
            additionalSlippage
        );

        thalesAmm.sellToAMM(
            address(rangedMarket.rightMarket()),
            IThalesAMM.Position.Up,
            amount,
            rightQuote,
            additionalSlippage
        );
    }

    function _sellIN(
        RangedMarket rangedMarket,
        uint amount,
        uint leftQuote,
        uint rightQuote,
        uint additionalSlippage
    ) internal {
        //TODO: remove this after Positional Market have the correct AMM address
        (IPosition up, ) = IPositionalMarket(rangedMarket.leftMarket()).getOptions();
        (, IPosition down) = IPositionalMarket(rangedMarket.rightMarket()).getOptions();
        IERC20Upgradeable(address(down)).approve(address(thalesAmm), type(uint256).max);
        IERC20Upgradeable(address(up)).approve(address(thalesAmm), type(uint256).max);
        //TODO: to here
        thalesAmm.sellToAMM(
            address(rangedMarket.leftMarket()),
            IThalesAMM.Position.Up,
            amount / 2,
            leftQuote,
            additionalSlippage
        );

        thalesAmm.sellToAMM(
            address(rangedMarket.rightMarket()),
            IThalesAMM.Position.Down,
            amount / 2,
            rightQuote,
            additionalSlippage
        );
    }

    function _updateSpentOnMarketAndSafeBoxOnSell(
        uint amount,
        RangedMarket rangedMarket,
        uint sUSDPaid
    ) internal {
        uint safeBoxShare = ((sUSDPaid * ONE) / (ONE - safeBoxImpact)) - sUSDPaid;

        if (safeBoxImpact > 0) {
            sUSD.transfer(safeBox, safeBoxShare);
        } else {
            safeBoxShare = 0;
        }

        // consider that amount might be 18 decimals
        if (amount > (spentOnMarket[address(rangedMarket)] + sUSDPaid + safeBoxShare)) {
            spentOnMarket[address(rangedMarket)] = 0;
        } else {
            spentOnMarket[address(rangedMarket)] = spentOnMarket[address(rangedMarket)] + sUSDPaid + safeBoxShare - amount;
        }
    }

    function transferSusdTo(address receiver, uint amount) external {
        require(_knownMarkets.contains(msg.sender), "Not a known ranged market");
        sUSD.safeTransfer(receiver, amount);
    }

    function retrieveSUSD(address payable account) external onlyOwner {
        sUSD.transfer(account, sUSD.balanceOf(address(this)));
    }

    function retrieveSUSDAmount(address payable account, uint amount) external onlyOwner {
        sUSD.transfer(account, amount);
    }

    function setRangedMarketMastercopy(address _rangedMarketMastercopy) external onlyOwner {
        rangedMarketMastercopy = _rangedMarketMastercopy;
    }

    function setRangedPositionMastercopy(address _rangedPositionMastercopy) external onlyOwner {
        rangedPositionMastercopy = _rangedPositionMastercopy;
    }

    function setMinMaxSupportedPrice(
        uint _minSupportedPrice,
        uint _maxSupportedPrice,
        uint _minDiffBetweenStrikes,
        uint _maxDiffBetweenStrikes
    ) public onlyOwner {
        minSupportedPrice = _minSupportedPrice;
        maxSupportedPrice = _maxSupportedPrice;
        minimalDifBetweenStrikes = _minDiffBetweenStrikes;
        maximalDifBetweenStrikes = _maxDiffBetweenStrikes;
        emit SetMinSupportedPrice(minSupportedPrice);
        emit SetMaxSupportedPrice(maxSupportedPrice);
        emit SetMinimalDifBetweenStrikes(minimalDifBetweenStrikes);
        emit SetMaxinalDifBetweenStrikes(maximalDifBetweenStrikes);
    }

    function setSafeBoxData(address _safeBox, uint _safeBoxImpact) external onlyOwner {
        safeBoxImpact = _safeBoxImpact;
        safeBox = _safeBox;
        emit SetSafeBoxImpact(_safeBoxImpact);
        emit SetSafeBox(_safeBox);
    }

    function setCapPerMarketAndRangedAMMFee(uint _capPerMarket, uint _rangedAMMFee) external onlyOwner {
        capPerMarket = _capPerMarket;
        rangedAmmFee = _rangedAMMFee;
        emit SetCapPerMarket(capPerMarket);
        emit SetRangedAmmFee(rangedAmmFee);
    }

    function setThalesAMM(address _thalesAMM) external onlyOwner {
        thalesAmm = IThalesAMM(_thalesAMM);
        sUSD.approve(address(thalesAmm), type(uint256).max);
        emit SetThalesAMM(_thalesAMM);
    }

    function setStakingThales(IStakingThales _stakingThales) external onlyOwner {
        stakingThales = _stakingThales;
        emit SetStakingThales(address(_stakingThales));
    }

    modifier knownRangedMarket(address market) {
        require(_knownMarkets.contains(market), "Not a known ranged market");
        _;
    }

    event SoldToAMM(
        address seller,
        address market,
        RangedMarket.Position position,
        uint amount,
        uint sUSDPaid,
        address susd,
        address asset
    );
    event BoughtFromAmm(
        address buyer,
        address market,
        RangedMarket.Position position,
        uint amount,
        uint sUSDPaid,
        address susd,
        address asset
    );

    event SetAmm(address amm);
    event SetSUSD(address sUSD);
    event SetThalesAMM(address amm);
    event RangedMarketCreated(address market, address leftMarket, address rightMarket);
    event SetSafeBoxImpact(uint _safeBoxImpact);
    event SetSafeBox(address _safeBox);
    event SetMinSupportedPrice(uint _spread);
    event SetMaxSupportedPrice(uint _spread);
    event SetMinimalDifBetweenStrikes(uint _spread);
    event SetMaxinalDifBetweenStrikes(uint _spread);
    event SetCapPerMarket(uint capPerMarket);
    event SetRangedAmmFee(uint rangedAmmFee);
    event SetStakingThales(address _stakingThales);
}

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

pragma solidity ^0.8.0;

/**
 * @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
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 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);
            }
        }
    }
}

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

pragma solidity ^0.8.0;

import "../IERC20Upgradeable.sol";
import "../../../utils/AddressUpgradeable.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 SafeERC20Upgradeable {
    using AddressUpgradeable for address;

    function safeTransfer(
        IERC20Upgradeable token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20Upgradeable 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(
        IERC20Upgradeable 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(
        IERC20Upgradeable 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(
        IERC20Upgradeable 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(IERC20Upgradeable 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");
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library MathUpgradeable {
    /**
     * @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);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.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 OwnableUpgradeable is Initializable, ContextUpgradeable {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function __Ownable_init() internal onlyInitializing {
        __Context_init_unchained();
        __Ownable_init_unchained();
    }

    function __Ownable_init_unchained() internal onlyInitializing {
        _transferOwnership(_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 {
        _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);
    }
    uint256[49] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/utils/Initializable.sol)

pragma solidity ^0.8.0;

import "../../utils/AddressUpgradeable.sol";

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To initialize the implementation contract, you can either invoke the
 * initializer manually, or you can include a constructor to automatically mark it as initialized when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() initializer {}
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     */
    bool private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Modifier to protect an initializer function from being invoked twice.
     */
    modifier initializer() {
        // If the contract is initializing we ignore whether _initialized is set in order to support multiple
        // inheritance patterns, but we only do this in the context of a constructor, because in other contexts the
        // contract may have been reentered.
        require(_initializing ? _isConstructor() : !_initialized, "Initializable: contract is already initialized");

        bool isTopLevelCall = !_initializing;
        if (isTopLevelCall) {
            _initializing = true;
            _initialized = true;
        }

        _;

        if (isTopLevelCall) {
            _initializing = false;
        }
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} modifier, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }

    function _isConstructor() private view returns (bool) {
        return !AddressUpgradeable.isContract(address(this));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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 SafeMathUpgradeable {
    /**
     * @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 substraction 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;
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20Upgradeable {
    /**
     * @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
// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)

pragma solidity ^0.8.0;

import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.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 PausableUpgradeable is Initializable, ContextUpgradeable {
    /**
     * @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.
     */
    function __Pausable_init() internal onlyInitializing {
        __Context_init_unchained();
        __Pausable_init_unchained();
    }

    function __Pausable_init_unchained() internal onlyInitializing {
        _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());
    }
    uint256[49] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/Clones.sol)

pragma solidity ^0.8.0;

/**
 * @dev https://eips.ethereum.org/EIPS/eip-1167[EIP 1167] is a standard for
 * deploying minimal proxy contracts, also known as "clones".
 *
 * > To simply and cheaply clone contract functionality in an immutable way, this standard specifies
 * > a minimal bytecode implementation that delegates all calls to a known, fixed address.
 *
 * The library includes functions to deploy a proxy using either `create` (traditional deployment) or `create2`
 * (salted deterministic deployment). It also includes functions to predict the addresses of clones deployed using the
 * deterministic method.
 *
 * _Available since v3.4._
 */
library Clones {
    /**
     * @dev Deploys and returns the address of a clone that mimics the behaviour of `implementation`.
     *
     * This function uses the create opcode, which should never revert.
     */
    function clone(address implementation) internal returns (address instance) {
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
            mstore(add(ptr, 0x14), shl(0x60, implementation))
            mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
            instance := create(0, ptr, 0x37)
        }
        require(instance != address(0), "ERC1167: create failed");
    }

    /**
     * @dev Deploys and returns the address of a clone that mimics the behaviour of `implementation`.
     *
     * This function uses the create2 opcode and a `salt` to deterministically deploy
     * the clone. Using the same `implementation` and `salt` multiple time will revert, since
     * the clones cannot be deployed twice at the same address.
     */
    function cloneDeterministic(address implementation, bytes32 salt) internal returns (address instance) {
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
            mstore(add(ptr, 0x14), shl(0x60, implementation))
            mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
            instance := create2(0, ptr, 0x37, salt)
        }
        require(instance != address(0), "ERC1167: create2 failed");
    }

    /**
     * @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
     */
    function predictDeterministicAddress(
        address implementation,
        bytes32 salt,
        address deployer
    ) internal pure returns (address predicted) {
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
            mstore(add(ptr, 0x14), shl(0x60, implementation))
            mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf3ff00000000000000000000000000000000)
            mstore(add(ptr, 0x38), shl(0x60, deployer))
            mstore(add(ptr, 0x4c), salt)
            mstore(add(ptr, 0x6c), keccak256(ptr, 0x37))
            predicted := keccak256(add(ptr, 0x37), 0x55)
        }
    }

    /**
     * @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
     */
    function predictDeterministicAddress(address implementation, bytes32 salt)
        internal
        view
        returns (address predicted)
    {
        return predictDeterministicAddress(implementation, salt, address(this));
    }
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.5.16;

interface IThalesAMM {
    enum Position {Up, Down}

    function manager() external view returns (address);

    function availableToBuyFromAMM(address market, Position position) external view returns (uint);

    function buyFromAmmQuote(
        address market,
        Position position,
        uint amount
    ) external view returns (uint);

    function buyFromAMM(
        address market,
        Position position,
        uint amount,
        uint expectedPayout,
        uint additionalSlippage
    ) external;

    function availableToSellToAMM(address market, Position position) external view returns (uint);

    function sellToAmmQuote(
        address market,
        Position position,
        uint amount
    ) external view returns (uint);

    function sellToAMM(
        address market,
        Position position,
        uint amount,
        uint expectedPayout,
        uint additionalSlippage
    ) external;

    function isMarketInAMMTrading(address market) external view returns (bool);
}

// SPDX-License-Identifier: MIT
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 aplied 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.
 */
contract ProxyReentrancyGuard {
    /// @dev counter to allow mutex lock with only one SSTORE operation
    uint256 private _guardCounter;
    bool private _initialized;

    function initNonReentrant() public {
        require(!_initialized, "Already initialized");
        _initialized = true;
        _guardCounter = 1;
    }

    /**
     * @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 make it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _guardCounter += 1;
        uint256 localCounter = _guardCounter;
        _;
        require(localCounter == _guardCounter, "ReentrancyGuard: reentrant call");
    }
}

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

// Clone of syntetix contract without constructor
contract ProxyOwned {
    address public owner;
    address public nominatedOwner;
    bool private _initialized;
    bool private _transferredAtInit;

    function setOwner(address _owner) public {
        require(_owner != address(0), "Owner address cannot be 0");
        require(!_initialized, "Already initialized, use nominateNewOwner");
        _initialized = true;
        owner = _owner;
        emit OwnerChanged(address(0), _owner);
    }

    function nominateNewOwner(address _owner) external onlyOwner {
        nominatedOwner = _owner;
        emit OwnerNominated(_owner);
    }

    function acceptOwnership() external {
        require(msg.sender == nominatedOwner, "You must be nominated before you can accept ownership");
        emit OwnerChanged(owner, nominatedOwner);
        owner = nominatedOwner;
        nominatedOwner = address(0);
    }

    function transferOwnershipAtInit(address proxyAddress) external onlyOwner {
        require(proxyAddress != address(0), "Invalid address");
        require(!_transferredAtInit, "Already transferred");
        owner = proxyAddress;
        _transferredAtInit = true;
        emit OwnerChanged(owner, proxyAddress);
    }

    modifier onlyOwner {
        _onlyOwner();
        _;
    }

    function _onlyOwner() private view {
        require(msg.sender == owner, "Only the contract owner may perform this action");
    }

    event OwnerNominated(address newOwner);
    event OwnerChanged(address oldOwner, address newOwner);
}

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

// Inheritance
import "./ProxyOwned.sol";

// Clone of syntetix contract without constructor

contract ProxyPausable is ProxyOwned {
    uint public lastPauseTime;
    bool public paused;

    

    /**
     * @notice Change the paused state of the contract
     * @dev Only the contract owner may call this.
     */
    function setPaused(bool _paused) external onlyOwner {
        // Ensure we're actually changing the state before we do anything
        if (_paused == paused) {
            return;
        }

        // Set our paused state.
        paused = _paused;

        // If applicable, set the last pause time.
        if (paused) {
            lastPauseTime = block.timestamp;
        }

        // Let everyone know that our pause state has changed.
        emit PauseChanged(paused);
    }

    event PauseChanged(bool isPaused);

    modifier notPaused {
        require(!paused, "This action cannot be performed while the contract is paused");
        _;
    }
}

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

library AddressSetLib {
    struct AddressSet {
        address[] elements;
        mapping(address => uint) indices;
    }

    function contains(AddressSet storage set, address candidate) internal view returns (bool) {
        if (set.elements.length == 0) {
            return false;
        }
        uint index = set.indices[candidate];
        return index != 0 || set.elements[0] == candidate;
    }

    function getPage(
        AddressSet storage set,
        uint index,
        uint pageSize
    ) internal view returns (address[] memory) {
        // NOTE: This implementation should be converted to slice operators if the compiler is updated to v0.6.0+
        uint endIndex = index + pageSize; // The check below that endIndex <= index handles overflow.

        // If the page extends past the end of the list, truncate it.
        if (endIndex > set.elements.length) {
            endIndex = set.elements.length;
        }
        if (endIndex <= index) {
            return new address[](0);
        }

        uint n = endIndex - index; // We already checked for negative overflow.
        address[] memory page = new address[](n);
        for (uint i; i < n; i++) {
            page[i] = set.elements[i + index];
        }
        return page;
    }

    function add(AddressSet storage set, address element) internal {
        // Adding to a set is an idempotent operation.
        if (!contains(set, element)) {
            set.indices[element] = set.elements.length;
            set.elements.push(element);
        }
    }

    function remove(AddressSet storage set, address element) internal {
        require(contains(set, element), "Element not in set.");
        // Replace the removed element with the last element of the list.
        uint index = set.indices[element];
        uint lastIndex = set.elements.length - 1; // We required that element is in the list, so it is not empty.
        if (index != lastIndex) {
            // No need to shift the last element if it is the one we want to delete.
            address shiftedElement = set.elements[lastIndex];
            set.elements[index] = shiftedElement;
            set.indices[shiftedElement] = index;
        }
        set.elements.pop();
        delete set.indices[element];
    }
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.5.16;

interface IStakingThales {
    function updateVolume(address account, uint amount) external;
    
    /* ========== VIEWS / VARIABLES ========== */
    function totalStakedAmount() external view returns (uint);

    function stakedBalanceOf(address account) external view returns (uint); 

    function currentPeriodRewards() external view returns (uint);

    function currentPeriodFees() external view returns (uint);

    function getLastPeriodOfClaimedRewards(address account) external view returns (uint);

    function getRewardsAvailable(address account) external view returns (uint);

    function getRewardFeesAvailable(address account) external view returns (uint);

    function getAlreadyClaimedRewards(address account) external view returns (uint);

    function getAlreadyClaimedFees(address account) external view returns (uint);

    function getContractRewardFunds() external view returns (uint);

    function getContractFeeFunds() external view returns (uint);

    
}

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

pragma solidity ^0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @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
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 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 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);
            }
        }
    }
}

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

pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";

/**
 * @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 ContextUpgradeable is Initializable {
    function __Context_init() internal onlyInitializing {
        __Context_init_unchained();
    }

    function __Context_init_unchained() internal onlyInitializing {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
    uint256[50] private __gap;
}

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

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"burner","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Burned","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"minter","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Mint","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_spender","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"success","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"claimant","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"burn","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"getBalanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getTotalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"market","type":"address"},{"internalType":"string","name":"_name","type":"string"},{"internalType":"string","name":"_symbol","type":"string"},{"internalType":"address","name":"_thalesRangedAMM","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"initialized","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"minter","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"mint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rangedMarket","outputs":[{"internalType":"contract RangedMarket","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"thalesRangedAMM","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"success","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_from","type":"address"},{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"success","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]