{
    "Function": "slitherConstructorConstantVariables",
    "File": "contracts/Cauldron.sol",
    "Parent Contracts": [
        "contracts/utils/access/AccessControl.sol"
    ],
    "High-Level Calls": [],
    "Internal Calls": [],
    "Library Calls": [],
    "Low-Level Calls": [],
    "Code": "contract Cauldron is AccessControl() {\n    using CauldronMath for uint128;\n    using WMul for uint256;\n    using WDiv for uint256;\n    using CastU128I128 for uint128;\n    using CastU256U32 for uint256;\n    using CastU256I256 for uint256;\n    using CastI128U128 for int128;\n\n    event AuctionIntervalSet(uint32 indexed auctionInterval);\n    event AssetAdded(bytes6 indexed assetId, address indexed asset);\n    event SeriesAdded(bytes6 indexed seriesId, bytes6 indexed baseId, address indexed fyToken);\n    event IlkAdded(bytes6 indexed seriesId, bytes6 indexed ilkId);\n    event SpotOracleAdded(bytes6 indexed baseId, bytes6 indexed ilkId, address indexed oracle, uint32 ratio);\n    event RateOracleAdded(bytes6 indexed baseId, address indexed oracle);\n    event DebtLimitsSet(bytes6 indexed baseId, bytes6 indexed ilkId, uint96 max, uint24 min, uint8 dec);\n\n    event VaultBuilt(bytes12 indexed vaultId, address indexed owner, bytes6 indexed seriesId, bytes6 ilkId);\n    event VaultTweaked(bytes12 indexed vaultId, bytes6 indexed seriesId, bytes6 indexed ilkId);\n    event VaultDestroyed(bytes12 indexed vaultId);\n    event VaultGiven(bytes12 indexed vaultId, address indexed receiver);\n\n    event VaultPoured(bytes12 indexed vaultId, bytes6 indexed seriesId, bytes6 indexed ilkId, int128 ink, int128 art);\n    event VaultStirred(bytes12 indexed from, bytes12 indexed to, uint128 ink, uint128 art);\n    event VaultRolled(bytes12 indexed vaultId, bytes6 indexed seriesId, uint128 art);\n    event VaultLocked(bytes12 indexed vaultId, uint256 indexed timestamp);\n\n    event SeriesMatured(bytes6 indexed seriesId, uint256 rateAtMaturity);\n\n    // ==== Configuration data ====\n    mapping (bytes6 => address)                                 public assets;          // Underlyings and collaterals available in Cauldron. 12 bytes still free.\n    mapping (bytes6 => DataTypes.Series)                        public series;          // Series available in Cauldron. We can possibly use a bytes6 (3e14 possible series).\n    mapping (bytes6 => mapping(bytes6 => bool))                 public ilks;            // [seriesId][assetId] Assets that are approved as collateral for a series\n\n    mapping (bytes6 => IOracle)                                 public rateOracles;     // Rate (borrowing rate) accruals oracle for the underlying\n    mapping (bytes6 => mapping(bytes6 => DataTypes.SpotOracle)) public spotOracles;     // [assetId][assetId] Spot price oracles\n\n    // ==== Protocol data ====\n    mapping (bytes6 => mapping(bytes6 => DataTypes.Debt))       public debt;            // [baseId][ilkId] Max and sum of debt per underlying and collateral.\n    mapping (bytes6 => uint256)                                 public ratesAtMaturity; // Borrowing rate at maturity for a mature series\n    uint32                                                      public auctionInterval;// Time that vaults in liquidation are protected from being grabbed by a different engine.\n\n    // ==== User data ====\n    mapping (bytes12 => DataTypes.Vault)                        public vaults;          // An user can own one or more Vaults, each one with a bytes12 identifier\n    mapping (bytes12 => DataTypes.Balances)                     public balances;        // Both debt and assets\n    mapping (bytes12 => uint32)                                 public auctions;        // If grater than zero, time that a vault was timestamped. Used for liquidation.\n\n    // ==== Administration ====\n\n    /// @dev Add a new Asset.\n    function addAsset(bytes6 assetId, address asset)\n        external\n        auth\n    {\n        require (assetId != bytes6(0), \"Asset id is zero\");\n        require (assets[assetId] == address(0), \"Id already used\");\n        assets[assetId] = asset;\n        emit AssetAdded(assetId, address(asset));\n    }\n\n    /// @dev Set the maximum and minimum debt for an underlying and ilk pair. Can be reset.\n    function setDebtLimits(bytes6 baseId, bytes6 ilkId, uint96 max, uint24 min, uint8 dec)\n        external\n        auth\n    {\n        require (assets[baseId] != address(0), \"Base not found\");\n        require (assets[ilkId] != address(0), \"Ilk not found\");\n        DataTypes.Debt memory debt_ = debt[baseId][ilkId];\n        debt_.max = max;\n        debt_.min = min;\n        debt_.dec = dec;\n        debt[baseId][ilkId] = debt_;\n        emit DebtLimitsSet(baseId, ilkId, max, min, dec);\n    }\n\n    /// @dev Set a rate oracle. Can be reset.\n    function setRateOracle(bytes6 baseId, IOracle oracle)\n        external\n        auth\n    {\n        require (assets[baseId] != address(0), \"Base not found\");\n        rateOracles[baseId] = oracle;\n        emit RateOracleAdded(baseId, address(oracle));\n    }\n\n    /// @dev Set the interval for which vaults being auctioned can't be grabbed by another liquidation engine\n    function setAuctionInterval(uint32 auctionInterval_)\n        external\n        auth\n    {\n        auctionInterval = auctionInterval_;\n        emit AuctionIntervalSet(auctionInterval_);\n    }\n\n    /// @dev Set a spot oracle and its collateralization ratio. Can be reset.\n    function setSpotOracle(bytes6 baseId, bytes6 ilkId, IOracle oracle, uint32 ratio)\n        external\n        auth\n    {\n        require (assets[baseId] != address(0), \"Base not found\");\n        require (assets[ilkId] != address(0), \"Ilk not found\");\n        spotOracles[baseId][ilkId] = DataTypes.SpotOracle({\n            oracle: oracle,\n            ratio: ratio                                                                    // With 6 decimals. 1000000 == 100%\n        });                                                                                 // Allows to replace an existing oracle.\n        emit SpotOracleAdded(baseId, ilkId, address(oracle), ratio);\n    }\n\n    /// @dev Add a new series\n    function addSeries(bytes6 seriesId, bytes6 baseId, IFYToken fyToken)\n        external\n        auth\n    {\n        require (seriesId != bytes6(0), \"Series id is zero\");\n        address base = assets[baseId];\n        require (base != address(0), \"Base not found\");\n        require (fyToken != IFYToken(address(0)), \"Series need a fyToken\");\n        require (fyToken.underlying() == base, \"Mismatched series and base\");\n        require (rateOracles[baseId] != IOracle(address(0)), \"Rate oracle not found\");\n        require (series[seriesId].fyToken == IFYToken(address(0)), \"Id already used\");\n        series[seriesId] = DataTypes.Series({\n            fyToken: fyToken,\n            maturity: fyToken.maturity().u32(),\n            baseId: baseId\n        });\n        emit SeriesAdded(seriesId, baseId, address(fyToken));\n    }\n\n    /// @dev Add a new Ilk (approve an asset as collateral for a series).\n    function addIlks(bytes6 seriesId, bytes6[] calldata ilkIds)\n        external\n        auth\n    {\n        DataTypes.Series memory series_ = series[seriesId];\n        require (\n            series_.fyToken != IFYToken(address(0)),\n            \"Series not found\"\n        );\n        for (uint256 i = 0; i < ilkIds.length; i++) {\n            require (\n                spotOracles[series_.baseId][ilkIds[i]].oracle != IOracle(address(0)),\n                \"Spot oracle not found\"\n            );\n            ilks[seriesId][ilkIds[i]] = true;\n            emit IlkAdded(seriesId, ilkIds[i]);\n        }\n    }\n\n    // ==== Vault management ====\n\n    /// @dev Create a new vault, linked to a series (and therefore underlying) and a collateral\n    function build(address owner, bytes12 vaultId, bytes6 seriesId, bytes6 ilkId)\n        external\n        auth\n        returns(DataTypes.Vault memory vault)\n    {\n        require (vaultId != bytes12(0), \"Vault id is zero\");\n        require (vaults[vaultId].seriesId == bytes6(0), \"Vault already exists\");   // Series can't take bytes6(0) as their id\n        require (ilks[seriesId][ilkId] == true, \"Ilk not added to series\");\n        vault = DataTypes.Vault({\n            owner: owner,\n            seriesId: seriesId,\n            ilkId: ilkId\n        });\n        vaults[vaultId] = vault;\n\n        emit VaultBuilt(vaultId, owner, seriesId, ilkId);\n    }\n\n    /// @dev Destroy an empty vault. Used to recover gas costs.\n    function destroy(bytes12 vaultId)\n        external\n        auth\n    {\n        DataTypes.Balances memory balances_ = balances[vaultId];\n        require (balances_.art == 0 && balances_.ink == 0, \"Only empty vaults\");\n        delete auctions[vaultId];\n        delete vaults[vaultId];\n        emit VaultDestroyed(vaultId);\n    }\n\n    /// @dev Change a vault series and/or collateral types.\n    function _tweak(bytes12 vaultId, DataTypes.Vault memory vault)\n        internal\n    {\n        require (ilks[vault.seriesId][vault.ilkId] == true, \"Ilk not added to series\");\n\n        vaults[vaultId] = vault;\n        emit VaultTweaked(vaultId, vault.seriesId, vault.ilkId);\n    }\n\n    /// @dev Change a vault series and/or collateral types.\n    /// We can change the series if there is no debt, or assets if there are no assets\n    function tweak(bytes12 vaultId, bytes6 seriesId, bytes6 ilkId)\n        external\n        auth\n        returns(DataTypes.Vault memory vault)\n    {\n        DataTypes.Balances memory balances_ = balances[vaultId];\n        vault = vaults[vaultId];\n        if (seriesId != vault.seriesId) {\n            require (balances_.art == 0, \"Only with no debt\");\n            vault.seriesId = seriesId;\n        }\n        if (ilkId != vault.ilkId) {\n            require (balances_.ink == 0, \"Only with no collateral\");\n            vault.ilkId = ilkId;\n        }\n        _tweak(vaultId, vault);\n    }\n\n    /// @dev Transfer a vault to another user.\n    function _give(bytes12 vaultId, address receiver)\n        internal\n        returns(DataTypes.Vault memory vault)\n    {\n        vault = vaults[vaultId];\n        vault.owner = receiver;\n        vaults[vaultId] = vault;\n        emit VaultGiven(vaultId, receiver);\n    }\n\n    /// @dev Transfer a vault to another user.\n    function give(bytes12 vaultId, address receiver)\n        external\n        auth\n        returns(DataTypes.Vault memory vault)\n    {\n        vault = _give(vaultId, receiver);\n    }\n\n    // ==== Asset and debt management ====\n\n    function vaultData(bytes12 vaultId, bool getSeries)\n        internal\n        view\n        returns (DataTypes.Vault memory vault_, DataTypes.Series memory series_, DataTypes.Balances memory balances_)\n    {\n        vault_ = vaults[vaultId];\n        require (vault_.seriesId != bytes6(0), \"Vault not found\");\n        if (getSeries) series_ = series[vault_.seriesId];\n        balances_ = balances[vaultId];\n    }\n\n    /// @dev Move collateral and debt between vaults.\n    function stir(bytes12 from, bytes12 to, uint128 ink, uint128 art)\n        external\n        auth\n        returns (DataTypes.Balances memory, DataTypes.Balances memory)\n    {\n        (DataTypes.Vault memory vaultFrom, , DataTypes.Balances memory balancesFrom) = vaultData(from, false);\n        (DataTypes.Vault memory vaultTo, , DataTypes.Balances memory balancesTo) = vaultData(to, false);\n\n        if (ink > 0) {\n            require (vaultFrom.ilkId == vaultTo.ilkId, \"Different collateral\");\n            balancesFrom.ink -= ink;\n            balancesTo.ink += ink;\n        }\n        if (art > 0) {\n            require (vaultFrom.seriesId == vaultTo.seriesId, \"Different series\");\n            balancesFrom.art -= art;\n            balancesTo.art += art;\n        }\n\n        balances[from] = balancesFrom;\n        balances[to] = balancesTo;\n\n        if (ink > 0) require(_level(vaultFrom, balancesFrom, series[vaultFrom.seriesId]) >= 0, \"Undercollateralized at origin\");\n        if (art > 0) require(_level(vaultTo, balancesTo, series[vaultTo.seriesId]) >= 0, \"Undercollateralized at destination\");\n\n        emit VaultStirred(from, to, ink, art);\n        return (balancesFrom, balancesTo);\n    }\n\n    /// @dev Add collateral and borrow from vault, pull assets from and push borrowed asset to user\n    /// Or, repay to vault and remove collateral, pull borrowed asset from and push assets to user\n    function _pour(\n        bytes12 vaultId,\n        DataTypes.Vault memory vault_,\n        DataTypes.Balances memory balances_,\n        DataTypes.Series memory series_,\n        int128 ink,\n        int128 art\n    )\n        internal returns (DataTypes.Balances memory)\n    {\n        // For now, the collateralization checks are done outside to allow for underwater operation. That might change.\n        if (ink != 0) {\n            balances_.ink = balances_.ink.add(ink);\n        }\n\n        // Modify vault and global debt records. If debt increases, check global limit.\n        if (art != 0) {\n            DataTypes.Debt memory debt_ = debt[series_.baseId][vault_.ilkId];\n            balances_.art = balances_.art.add(art);\n            debt_.sum = debt_.sum.add(art);\n            uint128 dust = debt_.min * uint128(10) ** debt_.dec;\n            uint128 line = debt_.max * uint128(10) ** debt_.dec;\n            require (balances_.art == 0 || balances_.art >= dust, \"Min debt not reached\");\n            if (art > 0) require (debt_.sum <= line, \"Max debt exceeded\");\n            debt[series_.baseId][vault_.ilkId] = debt_;\n        }\n        balances[vaultId] = balances_;\n\n        emit VaultPoured(vaultId, vault_.seriesId, vault_.ilkId, ink, art);\n        return balances_;\n    }\n\n    /// @dev Manipulate a vault, ensuring it is collateralized afterwards.\n    /// To be used by debt management contracts.\n    function pour(bytes12 vaultId, int128 ink, int128 art)\n        external\n        auth\n        returns (DataTypes.Balances memory)\n    {\n        (DataTypes.Vault memory vault_, DataTypes.Series memory series_, DataTypes.Balances memory balances_) = vaultData(vaultId, true);\n\n        balances_ = _pour(vaultId, vault_, balances_, series_, ink, art);\n\n        if (balances_.art > 0 && (ink < 0 || art > 0))                          // If there is debt and we are less safe\n            require(_level(vault_, balances_, series_) >= 0, \"Undercollateralized\");\n        return balances_;\n    }\n\n    /// @dev Give a non-timestamped vault to another user, and timestamp it.\n    /// To be used for liquidation engines.\n    function grab(bytes12 vaultId, address receiver)\n        external\n        auth\n    {\n        uint32 now_ = uint32(block.timestamp);\n        require (auctions[vaultId] + auctionInterval <= now_, \"Vault under auction\");        // Grabbing a vault protects it for a day from being grabbed by another liquidator. All grabbed vaults will be suddenly released on the 7th of February 2106, at 06:28:16 GMT. I can live with that.\n\n        (DataTypes.Vault memory vault_, DataTypes.Series memory series_, DataTypes.Balances memory balances_) = vaultData(vaultId, true);\n        require(_level(vault_, balances_, series_) < 0, \"Not undercollateralized\");\n\n        auctions[vaultId] = now_;\n        _give(vaultId, receiver);\n\n        emit VaultLocked(vaultId, now_);\n    }\n\n    /// @dev Reduce debt and collateral from a vault, ignoring collateralization checks.\n    /// To be used by liquidation engines.\n    function slurp(bytes12 vaultId, uint128 ink, uint128 art)\n        external\n        auth\n        returns (DataTypes.Balances memory)\n    {\n        (DataTypes.Vault memory vault_, DataTypes.Series memory series_, DataTypes.Balances memory balances_) = vaultData(vaultId, true);\n\n        balances_ = _pour(vaultId, vault_, balances_, series_, -(ink.i128()), -(art.i128()));\n\n        return balances_;\n    }\n\n    /// @dev Change series and debt of a vault.\n    /// The module calling this function also needs to buy underlying in the pool for the new series, and sell it in pool for the old series.\n    function roll(bytes12 vaultId, bytes6 newSeriesId, int128 art)\n        external\n        auth\n        returns (DataTypes.Vault memory, DataTypes.Balances memory)\n    {\n        (DataTypes.Vault memory vault_, DataTypes.Series memory oldSeries_, DataTypes.Balances memory balances_) = vaultData(vaultId, true);\n        DataTypes.Series memory newSeries_ = series[newSeriesId];\n        require (oldSeries_.baseId == newSeries_.baseId, \"Mismatched bases in series\");\n        \n        // Change the vault series\n        vault_.seriesId = newSeriesId;\n        _tweak(vaultId, vault_);\n\n        // Change the vault balances\n        balances_ = _pour(vaultId, vault_, balances_, newSeries_, 0, art);\n\n        require(_level(vault_, balances_, newSeries_) >= 0, \"Undercollateralized\");\n        emit VaultRolled(vaultId, newSeriesId, balances_.art);\n\n        return (vault_, balances_);\n    }\n\n    // ==== Accounting ====\n\n    /// @dev Return the collateralization level of a vault. It will be negative if undercollateralized.\n    function level(bytes12 vaultId) public returns (int256) {\n        (DataTypes.Vault memory vault_, DataTypes.Series memory series_, DataTypes.Balances memory balances_) = vaultData(vaultId, true);\n\n        return _level(vault_, balances_, series_);\n    }\n\n    /// @dev Record the borrowing rate at maturity for a series\n    function mature(bytes6 seriesId)\n        public\n    {\n        DataTypes.Series memory series_ = series[seriesId];\n        require (uint32(block.timestamp) >= series_.maturity, \"Only after maturity\");\n        require (ratesAtMaturity[seriesId] == 0, \"Already matured\");\n        _mature(seriesId, series_);\n    }\n\n    /// @dev Record the borrowing rate at maturity for a series\n    function _mature(bytes6 seriesId, DataTypes.Series memory series_)\n        internal\n    {\n        IOracle rateOracle = rateOracles[series_.baseId];\n        (uint256 rateAtMaturity,) = rateOracle.get(series_.baseId, bytes32(\"rate\"), 1e18);\n        ratesAtMaturity[seriesId] = rateAtMaturity;\n        emit SeriesMatured(seriesId, rateAtMaturity);\n    }\n    \n\n    /// @dev Retrieve the rate accrual since maturity, maturing if necessary.\n    function accrual(bytes6 seriesId)\n        public\n        returns (uint256)\n    {\n        DataTypes.Series memory series_ = series[seriesId];\n        require (uint32(block.timestamp) >= series_.maturity, \"Only after maturity\");\n        return _accrual(seriesId, series_);\n    }\n\n    /// @dev Retrieve the rate accrual since maturity, maturing if necessary.\n    /// Note: Call only after checking we are past maturity\n    function _accrual(bytes6 seriesId, DataTypes.Series memory series_)\n        private\n        returns (uint256 accrual_)\n    {\n        uint256 rateAtMaturity = ratesAtMaturity[seriesId];\n        if (rateAtMaturity == 0) {  // After maturity, but rate not yet recorded. Let's record it, and accrual is then 1.\n            _mature(seriesId, series_);\n        } else {\n            IOracle rateOracle = rateOracles[series_.baseId];\n            (uint256 rate,) = rateOracle.get(series_.baseId, bytes32(\"rate\"), 1e18);\n            accrual_ = rate.wdiv(rateAtMaturity);\n        }\n        accrual_ = accrual_ >= 1e18 ? accrual_ : 1e18;     // The accrual can't be below 1 (with 18 decimals)\n    }\n\n    /// @dev Return the collateralization level of a vault. It will be negative if undercollateralized.\n    function _level(\n        DataTypes.Vault memory vault_,\n        DataTypes.Balances memory balances_,\n        DataTypes.Series memory series_\n    )\n        internal\n        returns (int256)\n    {\n        DataTypes.SpotOracle memory spotOracle_ = spotOracles[series_.baseId][vault_.ilkId];\n        uint256 ratio = uint256(spotOracle_.ratio) * 1e12;   // Normalized to 18 decimals\n        (uint256 inkValue,) = spotOracle_.oracle.get(series_.baseId, vault_.ilkId, balances_.ink);    // ink * spot\n\n        if (uint32(block.timestamp) >= series_.maturity) {\n            uint256 accrual_ = _accrual(vault_.seriesId, series_);\n            return inkValue.i256() - uint256(balances_.art).wmul(accrual_).wmul(ratio).i256();\n        }\n\n        return inkValue.i256() - uint256(balances_.art).wmul(ratio).i256();\n    }\n}"
}