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// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.19;

import "@openzeppelin/contracts/access/Ownable.sol";
import "./interfaces/IPairsContract.sol";
import "./utils/TradingLibrary.sol";
import "./interfaces/IPosition.sol";
import "./interfaces/ITradingExtension.sol";

contract TradingExtension is ITradingExtension, Ownable {

    uint256 constant private DIVISION_CONSTANT = 1e10; // 100%

    address public immutable trading;
    bool public paused;
    uint256 public validSignatureTimer;

    mapping(address => bool) private isNode;
    mapping(address => uint) public minPositionSize;
    mapping(address => bool) public allowedMargin;

    IPairsContract private immutable pairsContract;
    IPosition private immutable position;

    event SetAllowedMargin(address _token, bool _isAllowed);
    event SetNode(address _node, bool _isNode);
    event SetValidSignatureTimer(uint256 _time);

    modifier onlyProtocol {
        require(msg.sender == trading, "!protocol");
        _;
    }

    constructor(
        address _trading,
        address _pairsContract,
        address _position
    )
    {
        if (
            _trading == address(0) ||
            _pairsContract == address(0) ||
            _position == address(0)
        ) revert BadConstructor();
        trading = _trading;
        pairsContract = IPairsContract(_pairsContract);
        position = IPosition(_position);
    }

    /**
    * @notice returns the minimum position size per collateral asset
    * @param _asset address of the asset
    */
    function minPos(
        address _asset
    ) external view returns(uint) {
        return minPositionSize[_asset];
    }

    /**
    * @notice limitClose helper
    * @dev only callable by trading contract
    * @param _id id of the position NFT
    * @param _tp true if takeprofit, else stoploss
    * @param _priceData price data object came from the price oracle
    * @return _limitPrice price of sl or tp returned from positions contract
    * @return _tigAsset address of the position collateral asset
    */
    function _limitClose(
        uint256 _id,
        bool _tp,
        PriceData calldata _priceData
    ) external view returns(uint256 _limitPrice, address _tigAsset) {
        IPosition.Trade memory _trade = position.trades(_id);
        _tigAsset = _trade.tigAsset;

        (uint256 _price,) = getVerifiedPrice(_trade.asset, _priceData, 0);

        if (_trade.orderType != 0) revert IsLimit();

        if (_tp) {
            if (_trade.tpPrice == 0) revert LimitNotSet();
            if (_trade.direction) {
                if (_trade.tpPrice > _price) revert LimitNotMet();
            } else {
                if (_trade.tpPrice < _price) revert LimitNotMet();
            }
            _limitPrice = _trade.tpPrice;
        } else {
            if (_trade.slPrice == 0) revert LimitNotSet();
            if (_trade.direction) {
                if (_trade.slPrice < _price) revert LimitNotMet();
            } else {
                if (_trade.slPrice > _price) revert LimitNotMet();
            }
            _limitPrice = _trade.slPrice;
        }
    }

    /**
    * @notice verifies the signed price and returns it
    * @param _asset id of position asset
    * @param _priceData price data object came from the price oracle
    * @param _withSpreadIsLong 0, 1, or 2 - to specify if we need the price returned to be after spread
    * @return _price price after verification and with spread if _withSpreadIsLong is 1 or 2
    * @return _spread spread after verification
    */
    function getVerifiedPrice(
        uint256 _asset,
        PriceData calldata _priceData,
        uint8 _withSpreadIsLong
    )
        public view
        returns(uint256 _price, uint256 _spread)
    {
        TradingLibrary.verifyPrice(
            validSignatureTimer,
            _asset,
            _priceData,
            isNode
        );
        _price = _priceData.price;
        _spread = _priceData.spread;

        if(_withSpreadIsLong == 1)
            _price += _price * _spread / DIVISION_CONSTANT;
        else if(_withSpreadIsLong == 2)
            _price -= _price * _spread / DIVISION_CONSTANT;
    }

    /**
     * @dev validates the inputs of trades
     * @param _assetId asset id
     * @param _minLeverage minimum leverage
     * @param _maxLeverage maximum leverage
     * @param _tigAsset margin asset
     * @param _margin margin
     * @param _leverage leverage
     * @param _orderType market, limit, stop order types
     */
    function validateTrade(uint256 _assetId, uint256 _minLeverage, uint256 _maxLeverage, address _tigAsset, uint256 _margin, uint256 _leverage, uint256 _orderType) external view {
        if (!allowedMargin[_tigAsset]) revert("Token not whitelisted.");
        if (paused) revert("Trading paused.");
        if (!pairsContract.allowedAsset(_assetId)) revert("Market is closed.");
        if (_leverage < _minLeverage || _leverage > _maxLeverage) revert("Leverage not within range.");
        if (_margin*_leverage/1e18 < minPositionSize[_tigAsset]) revert("Position size too small.");
        if (_orderType > 2) revert("Invalid order type.");
    }

    /**
     * @dev Sets the time for which a signature is valid
     * @param _time time in seconds
     */
    function setValidSignatureTimer(
        uint256 _time
    )
        external
        onlyOwner
    {
        validSignatureTimer = _time;
    }

    /**
     * @dev whitelists a node
     * @param _node node address
     * @param _isNode if address is set as a node
     */
    function setNode(address _node, bool _isNode) external onlyOwner {
        isNode[_node] = _isNode;
    }

    /**
     * @dev Allows a tigAsset to be used
     * @param _tigAsset tigAsset
     * @param _isAllowed if token is allowed to be used as margin
     */
    function setAllowedMargin(
        address _tigAsset,
        bool _isAllowed
    )
        external
        onlyOwner
    {
        allowedMargin[_tigAsset] = _isAllowed;
    }

    /**
     * @dev changes the minimum position size
     * @param _tigAsset tigAsset
     * @param _min minimum position size 18 decimals
     */
    function setMinPositionSize(
        address _tigAsset,
        uint256 _min
    )
        external
        onlyOwner
    {
        minPositionSize[_tigAsset] = _min;
    }

    /**
     * @dev Pauses or unpauses opening new positions
     * @param _paused If opening new positions is paused
     */
    function setPaused(bool _paused) external onlyOwner {
        paused = _paused;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions 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);
    }
}

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

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.0;

import "../Strings.sol";

/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSA {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS,
        InvalidSignatureV // Deprecated in v4.8
    }

    function _throwError(RecoverError error) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert("ECDSA: invalid signature");
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert("ECDSA: invalid signature length");
        } else if (error == RecoverError.InvalidSignatureS) {
            revert("ECDSA: invalid signature 's' value");
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature` or error string. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            /// @solidity memory-safe-assembly
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength);
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, signature);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address, RecoverError) {
        bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
        uint8 v = uint8((uint256(vs) >> 255) + 27);
        return tryRecover(hash, v, r, s);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     *
     * _Available since v4.2._
     */
    function recover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, r, vs);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address, RecoverError) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature);
        }

        return (signer, RecoverError.NoError);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from a `hash`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from `s`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
    }

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

    /**
     * @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 == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(
        uint256 x,
        uint256 y,
        uint256 denominator
    ) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1);

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(
        uint256 x,
        uint256 y,
        uint256 denominator,
        Rounding rounding
    ) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10**64) {
                value /= 10**64;
                result += 64;
            }
            if (value >= 10**32) {
                value /= 10**32;
                result += 32;
            }
            if (value >= 10**16) {
                value /= 10**16;
                result += 16;
            }
            if (value >= 10**8) {
                value /= 10**8;
                result += 8;
            }
            if (value >= 10**4) {
                value /= 10**4;
                result += 4;
            }
            if (value >= 10**2) {
                value /= 10**2;
                result += 2;
            }
            if (value >= 10**1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (rounding == Rounding.Up && 10**result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result * 8) < value ? 1 : 0);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Strings.sol)

pragma solidity ^0.8.0;

import "./math/Math.sol";

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _SYMBOLS = "0123456789abcdef";
    uint8 private constant _ADDRESS_LENGTH = 20;

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        unchecked {
            uint256 length = Math.log10(value) + 1;
            string memory buffer = new string(length);
            uint256 ptr;
            /// @solidity memory-safe-assembly
            assembly {
                ptr := add(buffer, add(32, length))
            }
            while (true) {
                ptr--;
                /// @solidity memory-safe-assembly
                assembly {
                    mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        unchecked {
            return toHexString(value, Math.log256(value) + 1);
        }
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }

    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
    }
}

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

interface IPairsContract {

    struct Asset {
        string name;
        address chainlinkFeed;
        uint256 minLeverage;
        uint256 maxLeverage;
        uint256 feeMultiplier;
        uint256 baseFundingRate;
    }

    struct OpenInterest {
        uint256 longOi;
        uint256 shortOi;
        uint256 maxOi;
    }

    function allowedAsset(uint) external view returns (bool);
    function idToAsset(uint256 _asset) external view returns (Asset memory);
    function idToOi(uint256 _asset, address _tigAsset) external view returns (OpenInterest memory);
    function setAssetBaseFundingRate(uint256 _asset, uint256 _baseFundingRate) external;
    function modifyLongOi(uint256 _asset, address _tigAsset, bool _onOpen, uint256 _amount) external;
    function modifyShortOi(uint256 _asset, address _tigAsset, bool _onOpen, uint256 _amount) external;
}

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

interface IPosition {

    struct Trade {
        uint256 margin;
        uint256 leverage;
        uint256 asset;
        bool direction;
        uint256 price;
        uint256 tpPrice;
        uint256 slPrice;
        uint256 orderType;
        address trader;
        uint256 id;
        address tigAsset;
        int accInterest;
    }

    struct MintTrade {
        address account;
        uint256 margin;
        uint256 leverage;
        uint256 asset;
        bool direction;
        uint256 price;
        uint256 tp;
        uint256 sl;
        uint256 orderType;
        address tigAsset;
    }

    function trades(uint256) external view returns (Trade memory);
    function executeLimitOrder(uint256 _id, uint256 _price, uint256 _newMargin) external;
    function modifyMargin(uint256 _id, uint256 _newMargin, uint256 _newLeverage) external;
    function addToPosition(uint256 _id, uint256 _newMargin, uint256 _newPrice) external;
    function reducePosition(uint256 _id, uint256 _newMargin) external;
    function assetOpenPositions(uint256 _asset) external view returns (uint256[] calldata);
    function assetOpenPositionsIndexes(uint256 _asset, uint256 _id) external view returns (uint256);
    function limitOrders(uint256 _asset) external view returns (uint256[] memory);
    function limitOrderIndexes(uint256 _asset, uint256 _id) external view returns (uint256);
    function assetOpenPositionsLength(uint256 _asset) external view returns (uint256);
    function limitOrdersLength(uint256 _asset) external view returns (uint256);
    function ownerOf(uint256 _id) external view returns (address);
    function mint(MintTrade memory _mintTrade) external;
    function burn(uint256 _id) external;
    function modifyTp(uint256 _id, uint256 _tpPrice) external;
    function modifySl(uint256 _id, uint256 _slPrice) external;
    function getCount() external view returns (uint);
    function updateFunding(uint256 _asset, address _tigAsset, uint256 _longOi, uint256 _shortOi, uint256 _baseFundingRate, uint256 _vaultFundingPercent) external;
    function setAccInterest(uint256 _id) external;
}

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

import "../utils/TradingLibrary.sol";

interface ITrading {

    struct TradeInfo {
        uint256 margin;
        address marginAsset;
        address stableVault;
        uint256 leverage;
        uint256 asset;
        bool direction;
        uint256 tpPrice;
        uint256 slPrice;
        address referrer;
    }
    struct ERC20PermitData {
        uint256 deadline;
        uint256 amount;
        uint8 v;
        bytes32 r;
        bytes32 s;
        bool usePermit;
    }
    struct Fees {
        uint256 daoFees;
        uint256 burnFees;
        uint256 refDiscount;
        uint256 botFees;
    }
    struct Delay {
        uint256 delay; // Block timestamp where delay ends
        bool actionType; // True for open, False for close
    }

    error LimitNotSet();
    error OnlyEOA();
    error NotLiquidatable();
    error TradingPaused();
    error OldPriceData();
    error OrderNotFound();
    error TooEarlyToCancel();
    error BadDeposit();
    error BadWithdraw();
    error BadStopLoss();
    error IsLimit();
    error ValueNotEqualToMargin();
    error BadLeverage();
    error NotMargin();
    error NotAllowedInVault();
    error NotVault();
    error NotOwner();
    error NotAllowedPair();
    error WaitDelay();
    error NotProxy();
    error BelowMinPositionSize();
    error BadClosePercent();
    error NoPrice();
    error LiqThreshold();
    error CloseToMaxPnL();
    error BadSetter();
    error BadConstructor();
    error NotLimit();
    error LimitNotMet();
    error NotEnoughGas();

    function marketOpen(
        TradeInfo calldata _tradeInfo,
        ERC20PermitData calldata _permitData,
        address _trader,
        PriceData calldata _priceData
    ) external;

    function marketClose(
        uint256 _id,
        uint256 _percent,
        address _stableVault,
        address _outputToken,
        address _trader,
        PriceData calldata _priceData
    ) external;

    function addMargin(
        uint256 _id,
        address _stableVault,
        address _marginAsset,
        uint256 _addMargin,
        ERC20PermitData calldata _permitData,
        address _trader,
        PriceData calldata _priceData
    ) external;

    function removeMargin(
        uint256 _id,
        address _stableVault,
        address _outputToken,
        uint256 _removeMargin,
        address _trader,
        PriceData calldata _priceData
    ) external;

     function addToPosition(
         uint256 _id,
         address _stableVault,
         address _marginAsset,
         uint256 _addMargin,
         ERC20PermitData calldata _permitData,
         address _trader,
         PriceData calldata _priceData
     ) external;

    function createLimitOrder(
        TradeInfo calldata _tradeInfo,
        uint256 _orderType, // 1 limit, 2 momentum
        uint256 _price,
        ERC20PermitData calldata _permitData,
        address _trader
    ) external;

    function cancelLimitOrder(
        uint256 _id,
        address _trader
    ) external;

    function updateTpSl(
        bool _type, // true is TP
        uint256 _id,
        uint256 _limitPrice,
        address _trader,
        PriceData calldata _priceData
    ) external;

    function executeLimitOrder(
        uint256 _id, 
        PriceData calldata _priceData
    ) external;

    function liquidatePosition(
        uint256 _id,
        PriceData calldata _priceData
    ) external;

    function limitClose(
        uint256 _id,
        bool _tp,
        PriceData calldata _priceData
    ) external;

    function proxyApprovals(address _account) external view returns(address);
}

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

import "../utils/TradingLibrary.sol";
import "./IPairsContract.sol";

interface ITradingExtension {

    error LimitNotMet();
    error LimitNotSet();
    error IsLimit();
    error GasTooHigh();
    error BadConstructor();

    function getVerifiedPrice(
        uint256 _asset,
        PriceData calldata _priceData,
        uint8 _withSpreadIsLong
    ) external returns(uint256 _price, uint256 _spread);

    function validateTrade(uint256 _assetId, uint256 _minLeverage, uint256 _maxLeverage, address _tigAsset, uint256 _margin, uint256 _leverage, uint256 _orderType) external view;

    function minPos(address) external view returns(uint);

    function paused() external view returns(bool);

    function _limitClose(
        uint256 _id,
        bool _tp,
        PriceData calldata _priceData
    ) external returns(uint256 _limitPrice, address _tigAsset);
}

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

import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
import "../interfaces/IPosition.sol";
import "../interfaces/ITrading.sol";

struct PriceData {
    address provider;
    bool isClosed;
    uint256 asset;
    uint256 price;
    uint256 spread;
    uint256 timestamp;
    bytes signature;
}

library TradingLibrary {

    using ECDSA for bytes32;

    uint256 constant DIVISION_CONSTANT = 1e10;

    /**
    * @notice returns position profit or loss
    * @param _direction true if long
    * @param _currentPrice current price
    * @param _price opening price
    * @param _leverage position leverage
    * @param _margin collateral amount
    * @param accInterest funding fees
    * @return _positionSize position size
    * @return _payout payout trader should get
    */
    function pnl(bool _direction, uint256 _currentPrice, uint256 _price, uint256 _margin, uint256 _leverage, int256 accInterest) external pure returns (uint256 _positionSize, int256 _payout) {
        uint256 _initPositionSize = _margin * _leverage / 1e18;
        if (_direction && _currentPrice >= _price) {
            _payout = int256(_margin) + int256(_initPositionSize * (1e18 * _currentPrice / _price - 1e18)/1e18) + accInterest;
        } else if (_direction && _currentPrice < _price) {
            _payout = int256(_margin) - int256(_initPositionSize * (1e18 - 1e18 * _currentPrice / _price)/1e18) + accInterest;
        } else if (!_direction && _currentPrice <= _price) {
            _payout = int256(_margin) + int256(_initPositionSize * (1e18 - 1e18 * _currentPrice / _price)/1e18) + accInterest;
        } else {
            _payout = int256(_margin) - int256(_initPositionSize * (1e18 * _currentPrice / _price - 1e18)/1e18) + accInterest;
        }
        _positionSize = _direction ? _initPositionSize * _currentPrice / _price : _initPositionSize * _price / _currentPrice;
    }

    /**
    * @notice returns position liquidation price
    * @param _direction true if long
    * @param _tradePrice opening price
    * @param _leverage position leverage
    * @param _margin collateral amount
    * @param _accInterest funding fees
    * @param _liqPercent liquidation percent
    * @return _liqPrice liquidation price
    */
    function liqPrice(bool _direction, uint256 _tradePrice, uint256 _leverage, uint256 _margin, int256 _accInterest, uint256 _liqPercent) public pure returns (uint256 _liqPrice) {
        if (_direction) {
            _liqPrice = uint256(int256(_tradePrice) - int256(_tradePrice) * (int256(_margin) * int256(_liqPercent) / int256(DIVISION_CONSTANT) + _accInterest) * 1e18 / int256(_margin) / int256(_leverage));
        } else {
            _liqPrice = uint256(int256(_tradePrice) + int256(_tradePrice) * (int256(_margin) * int256(_liqPercent) / int256(DIVISION_CONSTANT) + _accInterest) * 1e18 / int256(_margin) / int256(_leverage));
        }
    }

    /**
    * @notice uses liqPrice() and returns position liquidation price
    * @param _positions positions contract address
    * @param _id position id
    * @param _liqPercent liquidation percent
    */
    function getLiqPrice(address _positions, uint256 _id, uint256 _liqPercent) external view returns (uint256) {
        IPosition.Trade memory _trade = IPosition(_positions).trades(_id);
        return liqPrice(_trade.direction, _trade.price, _trade.leverage, _trade.margin, _trade.accInterest, _liqPercent);
    }

    /**
    * @notice verifies that price is signed by a whitelisted node
    * @param _validSignatureTimer seconds allowed before price is old
    * @param _asset position asset
    * @param _priceData PriceData object
    * @param _isNode mapping of allowed nodes
    */
    function verifyPrice(
        uint256 _validSignatureTimer,
        uint256 _asset,
        PriceData calldata _priceData,
        mapping(address => bool) storage _isNode
    )
        external view
    {
        require(block.timestamp <= _priceData.timestamp + _validSignatureTimer, "Price has expired.");
        require(block.timestamp >= _priceData.timestamp, "FutSig");
        require(!_priceData.isClosed, "Market is closed.");
        require(_asset == _priceData.asset, "!Asset");
        require(_priceData.price != 0, "NoPrice");
        address _provider = (
            keccak256(abi.encode(
                _priceData.provider,
                _priceData.isClosed,
                _priceData.asset,
                _priceData.price,
                _priceData.spread,
                _priceData.timestamp
            ))
        ).toEthSignedMessageHash().recover(_priceData.signature);
        require(_provider == _priceData.provider, "BadSig");
        require(_isNode[_provider], "!Node");
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 1000000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {
    "contracts/utils/TradingLibrary.sol": {
      "TradingLibrary": "0xaf58aef6ece14f8f7ddcb3109638a19b7098ce70"
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"_trading","type":"address"},{"internalType":"address","name":"_pairsContract","type":"address"},{"internalType":"address","name":"_position","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"BadConstructor","type":"error"},{"inputs":[],"name":"GasTooHigh","type":"error"},{"inputs":[],"name":"IsLimit","type":"error"},{"inputs":[],"name":"LimitNotMet","type":"error"},{"inputs":[],"name":"LimitNotSet","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"_token","type":"address"},{"indexed":false,"internalType":"bool","name":"_isAllowed","type":"bool"}],"name":"SetAllowedMargin","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"_node","type":"address"},{"indexed":false,"internalType":"bool","name":"_isNode","type":"bool"}],"name":"SetNode","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"_time","type":"uint256"}],"name":"SetValidSignatureTimer","type":"event"},{"inputs":[{"internalType":"uint256","name":"_id","type":"uint256"},{"internalType":"bool","name":"_tp","type":"bool"},{"components":[{"internalType":"address","name":"provider","type":"address"},{"internalType":"bool","name":"isClosed","type":"bool"},{"internalType":"uint256","name":"asset","type":"uint256"},{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"uint256","name":"spread","type":"uint256"},{"internalType":"uint256","name":"timestamp","type":"uint256"},{"internalType":"bytes","name":"signature","type":"bytes"}],"internalType":"struct PriceData","name":"_priceData","type":"tuple"}],"name":"_limitClose","outputs":[{"internalType":"uint256","name":"_limitPrice","type":"uint256"},{"internalType":"address","name":"_tigAsset","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"allowedMargin","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_asset","type":"uint256"},{"components":[{"internalType":"address","name":"provider","type":"address"},{"internalType":"bool","name":"isClosed","type":"bool"},{"internalType":"uint256","name":"asset","type":"uint256"},{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"uint256","name":"spread","type":"uint256"},{"internalType":"uint256","name":"timestamp","type":"uint256"},{"internalType":"bytes","name":"signature","type":"bytes"}],"internalType":"struct PriceData","name":"_priceData","type":"tuple"},{"internalType":"uint8","name":"_withSpreadIsLong","type":"uint8"}],"name":"getVerifiedPrice","outputs":[{"internalType":"uint256","name":"_price","type":"uint256"},{"internalType":"uint256","name":"_spread","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_asset","type":"address"}],"name":"minPos","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"minPositionSize","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_tigAsset","type":"address"},{"internalType":"bool","name":"_isAllowed","type":"bool"}],"name":"setAllowedMargin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_tigAsset","type":"address"},{"internalType":"uint256","name":"_min","type":"uint256"}],"name":"setMinPositionSize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_node","type":"address"},{"internalType":"bool","name":"_isNode","type":"bool"}],"name":"setNode","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"_paused","type":"bool"}],"name":"setPaused","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_time","type":"uint256"}],"name":"setValidSignatureTimer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"trading","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"validSignatureTimer","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_assetId","type":"uint256"},{"internalType":"uint256","name":"_minLeverage","type":"uint256"},{"internalType":"uint256","name":"_maxLeverage","type":"uint256"},{"internalType":"address","name":"_tigAsset","type":"address"},{"internalType":"uint256","name":"_margin","type":"uint256"},{"internalType":"uint256","name":"_leverage","type":"uint256"},{"internalType":"uint256","name":"_orderType","type":"uint256"}],"name":"validateTrade","outputs":[],"stateMutability":"view","type":"function"}]

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000000000000000000000000a35eabb4be62ed07e88c2af73234fe7dd48a73d4000000000000000000000000dee683a3a201597dc5d3059e8d4694001ce37832000000000000000000000000b60f2011d30b5b901d55a701c58f63ab34b4c23f

-----Decoded View---------------
Arg [0] : _trading (address): 0xA35eabB4be62Ed07E88c2aF73234fe7dD48a73D4
Arg [1] : _pairsContract (address): 0xdEe683A3A201597DC5d3059E8d4694001cE37832
Arg [2] : _position (address): 0xb60F2011d30b5b901d55a701C58f63aB34b4C23f

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 000000000000000000000000a35eabb4be62ed07e88c2af73234fe7dd48a73d4
Arg [1] : 000000000000000000000000dee683a3a201597dc5d3059e8d4694001ce37832
Arg [2] : 000000000000000000000000b60f2011d30b5b901d55a701c58f63ab34b4c23f