/**
 *Submitted for verification at Etherscan.io on 2022-03-14
*/

// SPDX-License-Identifier: MIT

pragma solidity =0.7.6;





contract DSMath {
    function add(uint256 x, uint256 y) internal pure returns (uint256 z) {
        require((z = x + y) >= x, "");
    }

    function sub(uint256 x, uint256 y) internal pure returns (uint256 z) {
        require((z = x - y) <= x, "");
    }

    function mul(uint256 x, uint256 y) internal pure returns (uint256 z) {
        require(y == 0 || (z = x * y) / y == x, "");
    }

    function div(uint256 x, uint256 y) internal pure returns (uint256 z) {
        return x / y;
    }

    function min(uint256 x, uint256 y) internal pure returns (uint256 z) {
        return x <= y ? x : y;
    }

    function max(uint256 x, uint256 y) internal pure returns (uint256 z) {
        return x >= y ? x : y;
    }

    function imin(int256 x, int256 y) internal pure returns (int256 z) {
        return x <= y ? x : y;
    }

    function imax(int256 x, int256 y) internal pure returns (int256 z) {
        return x >= y ? x : y;
    }

    uint256 constant WAD = 10**18;
    uint256 constant RAY = 10**27;

    function wmul(uint256 x, uint256 y) internal pure returns (uint256 z) {
        z = add(mul(x, y), WAD / 2) / WAD;
    }

    function rmul(uint256 x, uint256 y) internal pure returns (uint256 z) {
        z = add(mul(x, y), RAY / 2) / RAY;
    }

    function wdiv(uint256 x, uint256 y) internal pure returns (uint256 z) {
        z = add(mul(x, WAD), y / 2) / y;
    }

    function rdiv(uint256 x, uint256 y) internal pure returns (uint256 z) {
        z = add(mul(x, RAY), y / 2) / y;
    }

    // This famous algorithm is called "exponentiation by squaring"
    // and calculates x^n with x as fixed-point and n as regular unsigned.
    //
    // It's O(log n), instead of O(n) for naive repeated multiplication.
    //
    // These facts are why it works:
    //
    //  If n is even, then x^n = (x^2)^(n/2).
    //  If n is odd,  then x^n = x * x^(n-1),
    //   and applying the equation for even x gives
    //    x^n = x * (x^2)^((n-1) / 2).
    //
    //  Also, EVM division is flooring and
    //    floor[(n-1) / 2] = floor[n / 2].
    //
    function rpow(uint256 x, uint256 n) internal pure returns (uint256 z) {
        z = n % 2 != 0 ? x : RAY;

        for (n /= 2; n != 0; n /= 2) {
            x = rmul(x, x);

            if (n % 2 != 0) {
                z = rmul(z, x);
            }
        }
    }
}





abstract contract DSAuthority {
    function canCall(
        address src,
        address dst,
        bytes4 sig
    ) public view virtual returns (bool);
}





contract DSAuthEvents {
    event LogSetAuthority(address indexed authority);
    event LogSetOwner(address indexed owner);
}

contract DSAuth is DSAuthEvents {
    DSAuthority public authority;
    address public owner;

    constructor() {
        owner = msg.sender;
        emit LogSetOwner(msg.sender);
    }

    function setOwner(address owner_) public auth {
        owner = owner_;
        emit LogSetOwner(owner);
    }

    function setAuthority(DSAuthority authority_) public auth {
        authority = authority_;
        emit LogSetAuthority(address(authority));
    }

    modifier auth {
        require(isAuthorized(msg.sender, msg.sig), "Not authorized");
        _;
    }

    function isAuthorized(address src, bytes4 sig) internal view returns (bool) {
        if (src == address(this)) {
            return true;
        } else if (src == owner) {
            return true;
        } else if (authority == DSAuthority(0)) {
            return false;
        } else {
            return authority.canCall(src, address(this), sig);
        }
    }
}





contract DSNote {
    event LogNote(
        bytes4 indexed sig,
        address indexed guy,
        bytes32 indexed foo,
        bytes32 indexed bar,
        uint256 wad,
        bytes fax
    ) anonymous;

    modifier note {
        bytes32 foo;
        bytes32 bar;

        assembly {
            foo := calldataload(4)
            bar := calldataload(36)
        }

        emit LogNote(msg.sig, msg.sender, foo, bar, msg.value, msg.data);

        _;
    }
}






abstract contract DSProxy is DSAuth, DSNote {
    DSProxyCache public cache; // global cache for contracts

    constructor(address _cacheAddr) {
        require(setCache(_cacheAddr), "Cache not set");
    }

    // solhint-disable-next-line no-empty-blocks
    receive() external payable {}

    // use the proxy to execute calldata _data on contract _code
    function execute(bytes memory _code, bytes memory _data)
        public
        payable
        virtual
        returns (address target, bytes32 response);

    function execute(address _target, bytes memory _data)
        public
        payable
        virtual
        returns (bytes32 response);

    //set new cache
    function setCache(address _cacheAddr) public payable virtual returns (bool);
}

contract DSProxyCache {
    mapping(bytes32 => address) cache;

    function read(bytes memory _code) public view returns (address) {
        bytes32 hash = keccak256(_code);
        return cache[hash];
    }

    function write(bytes memory _code) public returns (address target) {
        assembly {
            target := create(0, add(_code, 0x20), mload(_code))
            switch iszero(extcodesize(target))
                case 1 {
                    // throw if contract failed to deploy
                    revert(0, 0)
                }
        }
        bytes32 hash = keccak256(_code);
        cache[hash] = target;
    }
}





abstract contract IManager {
    function last(address) virtual public returns (uint);
    function cdpCan(address, uint, address) virtual public view returns (uint);
    function ilks(uint) virtual public view returns (bytes32);
    function owns(uint) virtual public view returns (address);
    function urns(uint) virtual public view returns (address);
    function vat() virtual public view returns (address);
    function open(bytes32, address) virtual public returns (uint);
    function give(uint, address) virtual public;
    function cdpAllow(uint, address, uint) virtual public;
    function urnAllow(address, uint) virtual public;
    function frob(uint, int, int) virtual public;
    function flux(uint, address, uint) virtual public;
    function move(uint, address, uint) virtual public;
    function exit(address, uint, address, uint) virtual public;
    function quit(uint, address) virtual public;
    function enter(address, uint) virtual public;
    function shift(uint, uint) virtual public;
}





abstract contract IGem {
    function dec() virtual public returns (uint);
    function gem() virtual public returns (IGem);
    function join(address, uint) virtual public payable;
    function exit(address, uint) virtual public;

    function approve(address, uint) virtual public;
    function transfer(address, uint) virtual public returns (bool);
    function transferFrom(address, address, uint) virtual public returns (bool);
    function deposit() virtual public payable;
    function withdraw(uint) virtual public;
    function allowance(address, address) virtual public returns (uint);
}





abstract contract IJoin {
    bytes32 public ilk;

    function dec() virtual public view returns (uint);
    function gem() virtual public view returns (IGem);
    function join(address, uint) virtual public payable;
    function exit(address, uint) virtual public;
}





abstract contract IVat {

    struct Urn {
        uint256 ink;   // Locked Collateral  [wad]
        uint256 art;   // Normalised Debt    [wad]
    }

    struct Ilk {
        uint256 Art;   // Total Normalised Debt     [wad]
        uint256 rate;  // Accumulated Rates         [ray]
        uint256 spot;  // Price with Safety Margin  [ray]
        uint256 line;  // Debt Ceiling              [rad]
        uint256 dust;  // Urn Debt Floor            [rad]
    }

    mapping (bytes32 => mapping (address => Urn )) public urns;
    mapping (bytes32 => Ilk)                       public ilks;
    mapping (bytes32 => mapping (address => uint)) public gem;  // [wad]

    function can(address, address) virtual public view returns (uint);
    function dai(address) virtual public view returns (uint);
    function frob(bytes32, address, address, address, int, int) virtual public;
    function hope(address) virtual public;
    function nope(address) virtual public;
    function move(address, address, uint) virtual public;
    function fork(bytes32, address, address, int, int) virtual public;
}





interface ICropper {
    function proxy(address) view external returns (address);
    function getOrCreateProxy(address) external returns (address);
    function join(address, address, uint256) external;
    function exit(address, address, uint256) external;
    function flee(address, address, uint256) external;
    function frob(bytes32, address, address, address, int256, int256) external;
    function quit(bytes32, address, address) external;
}





interface IERC20 {
    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    function decimals() external view returns (uint256 digits);
    function totalSupply() external view returns (uint256 supply);

    function balanceOf(address _owner) external view returns (uint256 balance);

    function transfer(address _to, uint256 _value) external returns (bool success);

    function transferFrom(
        address _from,
        address _to,
        uint256 _value
    ) external returns (bool success);

    function approve(address _spender, uint256 _value) external returns (bool success);

    function allowance(address _owner, address _spender) external view returns (uint256 remaining);

    event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}





abstract contract IWETH {
    function allowance(address, address) public virtual view returns (uint256);

    function balanceOf(address) public virtual view returns (uint256);

    function approve(address, uint256) public virtual;

    function transfer(address, uint256) public virtual returns (bool);

    function transferFrom(
        address,
        address,
        uint256
    ) public virtual returns (bool);

    function deposit() public payable virtual;

    function withdraw(uint256) public virtual;
}





library Address {
    function isContract(address account) internal view returns (bool) {
        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
        // for accounts without code, i.e. `keccak256('')`
        bytes32 codehash;
        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            codehash := extcodehash(account)
        }
        return (codehash != accountHash && codehash != 0x0);
    }

    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return _functionCallWithValue(target, data, 0, errorMessage);
    }

    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");
    }

    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");
        return _functionCallWithValue(target, data, value, errorMessage);
    }

    function _functionCallWithValue(
        address target,
        bytes memory data,
        uint256 weiValue,
        string memory errorMessage
    ) private returns (bytes memory) {
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{value: weiValue}(data);
        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

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}





library SafeMath {
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // 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 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}







library SafeERC20 {
    using SafeMath for uint256;
    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 Edited so it always first approves 0 and then the value, because of non standard tokens
    function safeApprove(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
        _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).add(value);
        _callOptionalReturn(
            token,
            abi.encodeWithSelector(token.approve.selector, spender, newAllowance)
        );
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(
            value,
            "SafeERC20: decreased allowance below zero"
        );
        _callOptionalReturn(
            token,
            abi.encodeWithSelector(token.approve.selector, spender, newAllowance)
        );
    }

    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        bytes memory returndata = address(token).functionCall(
            data,
            "SafeERC20: low-level call failed"
        );
        if (returndata.length > 0) {
            // Return data is optional
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}






library TokenUtils {
    using SafeERC20 for IERC20;

    address public constant WETH_ADDR = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
    address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;

    function approveToken(
        address _tokenAddr,
        address _to,
        uint256 _amount
    ) internal {
        if (_tokenAddr == ETH_ADDR) return;

        if (IERC20(_tokenAddr).allowance(address(this), _to) < _amount) {
            IERC20(_tokenAddr).safeApprove(_to, _amount);
        }
    }

    function pullTokensIfNeeded(
        address _token,
        address _from,
        uint256 _amount
    ) internal returns (uint256) {
        // handle max uint amount
        if (_amount == type(uint256).max) {
            _amount = getBalance(_token, _from);
        }

        if (_from != address(0) && _from != address(this) && _token != ETH_ADDR && _amount != 0) {
            IERC20(_token).safeTransferFrom(_from, address(this), _amount);
        }

        return _amount;
    }

    function withdrawTokens(
        address _token,
        address _to,
        uint256 _amount
    ) internal returns (uint256) {
        if (_amount == type(uint256).max) {
            _amount = getBalance(_token, address(this));
        }

        if (_to != address(0) && _to != address(this) && _amount != 0) {
            if (_token != ETH_ADDR) {
                IERC20(_token).safeTransfer(_to, _amount);
            } else {
                (bool success, ) = _to.call{value: _amount}("");
                require(success, "Eth send fail");
            }
        }

        return _amount;
    }

    function depositWeth(uint256 _amount) internal {
        IWETH(WETH_ADDR).deposit{value: _amount}();
    }

    function withdrawWeth(uint256 _amount) internal {
        IWETH(WETH_ADDR).withdraw(_amount);
    }

    function getBalance(address _tokenAddr, address _acc) internal view returns (uint256) {
        if (_tokenAddr == ETH_ADDR) {
            return _acc.balance;
        } else {
            return IERC20(_tokenAddr).balanceOf(_acc);
        }
    }

    function getTokenDecimals(address _token) internal view returns (uint256) {
        if (_token == ETH_ADDR) return 18;

        return IERC20(_token).decimals();
    }
}






abstract contract ICdpRegistry {
    function open(
        bytes32 ilk,
        address usr
    ) public virtual returns (uint256);

    function cdps(bytes32, address) virtual public view returns (uint256);
    function owns(uint) virtual public view returns (address);
    function ilks(uint) virtual public view returns (bytes32);

}





contract MainnetMcdAddresses {
    address internal constant VAT_ADDR = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B;
    address internal constant DAI_JOIN_ADDR = 0x9759A6Ac90977b93B58547b4A71c78317f391A28;
    address internal constant DAI_ADDR = 0x6B175474E89094C44Da98b954EedeAC495271d0F;
    address internal constant JUG_ADDRESS = 0x19c0976f590D67707E62397C87829d896Dc0f1F1;
    address internal constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3;
    address internal constant PROXY_REGISTRY_ADDR = 0x4678f0a6958e4D2Bc4F1BAF7Bc52E8F3564f3fE4;

    address internal constant CDP_REGISTRY = 0xBe0274664Ca7A68d6b5dF826FB3CcB7c620bADF3;
    address internal constant CROPPER = 0x8377CD01a5834a6EaD3b7efb482f678f2092b77e;

}













contract McdHelper is DSMath, MainnetMcdAddresses {

    IVat public constant vat = IVat(VAT_ADDR);

    /// @notice Returns a normalized debt _amount based on the current rate
    /// @param _amount Amount of dai to be normalized
    /// @param _rate Current rate of the stability fee
    /// @param _daiVatBalance Balance od Dai in the Vat for that CDP
    function normalizeDrawAmount(uint _amount, uint _rate, uint _daiVatBalance) internal pure returns (int dart) {
        if (_daiVatBalance < mul(_amount, RAY)) {
            dart = toPositiveInt(sub(mul(_amount, RAY), _daiVatBalance) / _rate);
            dart = mul(uint(dart), _rate) < mul(_amount, RAY) ? dart + 1 : dart;
        }
    }

    /// @notice Converts a number to Rad precision
    /// @param _wad The input number in wad precision
    function toRad(uint _wad) internal pure returns (uint) {
        return mul(_wad, 10 ** 27);
    }

    /// @notice Converts a number to 18 decimal precision
    /// @dev If token decimal is bigger than 18, function reverts
    /// @param _joinAddr Join address of the collateral
    /// @param _amount Number to be converted
    function convertTo18(address _joinAddr, uint256 _amount) internal view returns (uint256) {
        return mul(_amount, 10 ** sub(18 , IJoin(_joinAddr).dec()));
    }

    /// @notice Converts a uint to int and checks if positive
    /// @param _x Number to be converted
    function toPositiveInt(uint _x) internal pure returns (int y) {
        y = int(_x);
        require(y >= 0, "int-overflow");
    }

    /// @notice Gets Dai amount in Vat which can be added to Cdp
    /// @param _vat Address of Vat contract
    /// @param _daiBalance Amount of dai in vat contract for that urn
    /// @param _urn Urn of the Cdp
    /// @param _ilk Ilk of the Cdp
    function normalizePaybackAmount(address _vat, uint256 _daiBalance, address _urn, bytes32 _ilk) internal view returns (int amount) {

        (, uint rate,,,) = IVat(_vat).ilks(_ilk);
        (, uint art) = IVat(_vat).urns(_ilk, _urn);

        amount = toPositiveInt(_daiBalance / rate);
        amount = uint(amount) <= art ? - amount : - toPositiveInt(art);
    }

    /// @notice Gets the whole debt of the CDP
    /// @param _vat Address of Vat contract
    /// @param _usr Address of the Dai holder
    /// @param _urn Urn of the Cdp
    /// @param _ilk Ilk of the Cdp
    function getAllDebt(address _vat, address _usr, address _urn, bytes32 _ilk) internal view returns (uint daiAmount) {
        (, uint rate,,,) = IVat(_vat).ilks(_ilk);
        (, uint art) = IVat(_vat).urns(_ilk, _urn);
        uint dai = IVat(_vat).dai(_usr);

        uint rad = sub(mul(art, rate), dai);
        daiAmount = rad / RAY;

        // handles precision error (off by 1 wei)
        daiAmount = mul(daiAmount, RAY) < rad ? daiAmount + 1 : daiAmount;
    }

    /// @notice Checks if the join address is one of the Ether coll. types
    /// @param _joinAddr Join address to check
    function isEthJoinAddr(address _joinAddr) internal view returns (bool) {
        // if it's dai_join_addr don't check gem() it will fail
        if (_joinAddr == DAI_JOIN_ADDR) return false;

        // if coll is weth it's and eth type coll
        if (address(IJoin(_joinAddr).gem()) == TokenUtils.WETH_ADDR) {
            return true;
        }

        return false;
    }

    /// @notice Returns the underlying token address from the joinAddr
    /// @dev For eth based collateral returns 0xEee... not weth addr
    /// @param _joinAddr Join address to check
    function getTokenFromJoin(address _joinAddr) internal view returns (address) {
        // if it's dai_join_addr don't check gem() it will fail, return dai addr
        if (_joinAddr == DAI_JOIN_ADDR) {
            return DAI_ADDR;
        }

        return address(IJoin(_joinAddr).gem());
    }

    function getUrnAndIlk(address _mcdManager, uint256 _vaultId) public view returns (address urn, bytes32 ilk) {
        if (_mcdManager == CROPPER) {
            address owner = ICdpRegistry(CDP_REGISTRY).owns(_vaultId);
            urn = ICropper(CROPPER).proxy(owner);
            ilk = ICdpRegistry(CDP_REGISTRY).ilks(_vaultId);
        } else {
            urn = IManager(_mcdManager).urns(_vaultId);
            ilk = IManager(_mcdManager).ilks(_vaultId);
        }
    }

    /// @notice Gets CDP info (collateral, debt)
    /// @param _manager Manager contract
    /// @param _cdpId Id of the CDP
    /// @param _ilk Ilk of the CDP
    function getCdpInfo(IManager _manager, uint _cdpId, bytes32 _ilk) public view returns (uint, uint) {
        address urn;

        if (address(_manager) == CROPPER) {
            address owner = ICdpRegistry(CDP_REGISTRY).owns(_cdpId);
            urn = ICropper(CROPPER).proxy(owner);
        } else {
            urn = _manager.urns(_cdpId);
        }

        (uint collateral, uint debt) = vat.urns(_ilk, urn);
        (,uint rate,,,) = vat.ilks(_ilk);

        return (collateral, rmul(debt, rate));
    }

    /// @notice Address that owns the DSProxy that owns the CDP
    /// @param _manager Manager contract
    /// @param _cdpId Id of the CDP
    function getOwner(IManager _manager, uint _cdpId) public view returns (address) {
        address owner;

        if (address(_manager) == CROPPER) {
            owner = ICdpRegistry(CDP_REGISTRY).owns(_cdpId);
        } else {
            owner = _manager.owns(_cdpId);
        }

        DSProxy proxy = DSProxy(uint160(owner));

        return proxy.owner();
    }
}





abstract contract IPipInterface {
    function read() public virtual returns (bytes32);
    function poke() external virtual;
}





abstract contract ISpotter {
    struct Ilk {
        IPipInterface pip;
        uint256 mat;
    }

    mapping (bytes32 => Ilk) public ilks;

    uint256 public par;

}









contract McdView is DSMath, McdHelper {
    address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B;
    ISpotter public constant spotter = ISpotter(SPOTTER_ADDRESS);

    /// @notice Gets Vault info (collateral, debt)
    /// @param _managerAddr Address of the McdManger or Cropper contract
    /// @param _vaultId Id of the Vaults
    /// @param _ilk Ilk of the Vault
    function getVaultInfo(
        address _managerAddr,
        uint256 _vaultId,
        bytes32 _ilk
    ) public view returns (uint256, uint256) {
        address urn;
        if (_managerAddr == CROPPER) {
            address owner = ICdpRegistry(CDP_REGISTRY).owns(_vaultId);
            urn = ICropper(CROPPER).proxy(owner);
        } else {
            urn = IManager(_managerAddr).urns(_vaultId);
        }

        (uint256 collateral, uint256 debt) = vat.urns(_ilk, urn);
        (, uint256 rate, , , ) = vat.ilks(_ilk);

        return (collateral, rmul(debt, rate));
    }

    /// @notice Gets a price of the asset
    /// @param _ilk Ilk of the Vault
    function getPrice(bytes32 _ilk) public view returns (uint256) {
        (, uint256 mat) = spotter.ilks(_ilk);
        (, , uint256 spot, , ) = vat.ilks(_ilk);

        return rmul(rmul(spot, spotter.par()), mat);
    }

    /// @notice Gets Vaults ratio
    /// @param _vaultId Id of the Vault
    function getRatio(address _managerAddr, uint256 _vaultId) public view returns (uint256) {
        bytes32 ilk = IManager(_managerAddr).ilks(_vaultId);

        uint256 price = getPrice(ilk);

        (uint256 collateral, uint256 debt) = getVaultInfo(_managerAddr, _vaultId, ilk);

        if (debt == 0) return 0;

        return rdiv(wmul(collateral, price), debt) / (10**18);
    }

    function getCropJoinCdps(bytes32[] memory _ilks, address _user)
        public
        view
        returns (
            uint256[] memory ids,
            address[] memory urns,
            bytes32[] memory ilks
        )
    {
        uint256 count = _ilks.length;
        ids = new uint[](count);
        urns = new address[](count);
        ilks = new bytes32[](count);

        for (uint256 i = 0; i < count; ++i) {
            ids[i] = ICdpRegistry(CDP_REGISTRY).cdps(_ilks[i], _user);

            address owner = ICdpRegistry(CDP_REGISTRY).owns(ids[i]);
            urns[i] = ICropper(CROPPER).proxy(owner);

            ilks[i] = _ilks[i];
        }
    }
}