// Contract: DssSpell
// Target function: function addWritersToMedianWhitelist(address _median, address[] memory _feeds) public
56 _duration) public {
        Fileable(flap()).file("tau", _duration);
    }
    /**
        @dev Set the number of seconds that pass before system debt is auctioned for MKR tokens.
        @param _duration Duration in seconds
    */
    function setDebtAuctionDelay(uint256 _duration) public {
        Fileable(vow()).file("wait", _duration);
    }
    /**
        @dev Set the DAI amount for system debt to be covered by each debt auction. Amount will be converted to the correct internal precision.
        @param _amount The amount to set in DAI (ex. 10m DAI amount == 10000000)
    */
    function setDebtAuctionDAIAmount(uint256 _amount) public {
        require(_amount < WAD);  // "LibDssExec/incorrect-vow-sump-precision"
        Fileable(vow()).file("sump", _amount * RAD);
    }
    /**
        @dev Set the starting MKR amount to be auctioned off to cover system debt in debt auctions. Amount will be converted to the correct internal precision.
        @param _amount The amount to set in MKR (ex. 250 MKR amount == 250)
    */
    function setDebtAuctionMKRAmount(uint256 _amount) public {
        require(_amount < WAD);  // "LibDssExec/incorrect-vow-dump-precision"
        Fileable(vow()).file("dump", _amount * WAD);
    }
    /**
        @dev Set minimum bid increase for debt auctions. Amount will be converted to the correct internal precision.
        @dev Equation used for conversion is (1 + pct / 10,000) * WAD
        @param _pct_bps    The pct, in basis points, to set in integer form (x100). (ex. 5% = 5 * 100 = 500)
    */
    function setMinDebtAuctionBidIncrease(uint256 _pct_bps) public {
        require(_pct_bps < BPS_ONE_HUNDRED_PCT);  // "LibDssExec/incorrect-flap-beg-precision"
        Fileable(flop()).file("beg", add(WAD, wdiv(_pct_bps, BPS_ONE_HUNDRED_PCT)));
    }
    /**
        @dev Set bid duration for debt auctions.
        @param _duration Amount of time for bids.
    */
    function setDebtAuctionBidDuration(uint256 _duration) public {
        Fileable(flop()).file("ttl", _duration);
    }
    /**
        @dev Set total auction duration for debt auctions.
        @param _duration Amount of time for auctions.
    */
    function setDebtAuctionDuration(uint256 _duration) public {
        Fileable(flop()).file("tau", _duration);
    }
    /**
        @dev Set the rate of increasing amount of MKR out for auction during debt auctions. Amount will be converted to the correct internal precision.
        @dev MKR amount is increased by this rate every "tick" (if auction duration has passed and no one has bid on the MKR)
        @dev Equation used for conversion is (1 + pct / 10,000) * WAD
        @param _pct_bps    The pct, in basis points, to set in integer form (x100). (ex. 5% = 5 * 100 = 500)
    */
    function setDebtAuctionMKRIncreaseRate(uint256 _pct_bps) public {
        Fileable(flop()).file("pad", add(WAD, wdiv(_pct_bps, BPS_ONE_HUNDRED_PCT)));
    }
    /**
        @dev Set the maximum total DAI amount that can be out for liquidation in the system at any point. Amount will be converted to the correct internal precision.
        @param _amount The amount to set in DAI (ex. 250,000 DAI amount == 250000)
    */
    function setMaxTotalDAILiquidationAmount(uint256 _amount) public {
        require(_amount < WAD);  // "LibDssExec/incorrect-vow-dump-precision"
        Fileable(cat()).file("box", _amount * RAD);
    }
    /**
        @dev Set the duration of time that has to pass during emergency shutdown before collateral can start being claimed by DAI holders.
        @param _duration Time in seconds to set for ES processing time
    */
    function setEmergencyShutdownProcessingTime(uint256 _duration) public {
        Fileable(end()).file("wait", _duration);
    }
    /**
        @dev Set the global stability fee (is not typically used, currently is 0).
            Many of the settings that change weekly rely on the rate accumulator
            described at https://docs.makerdao.com/smart-contract-modules/rates-module
            To check this yourself, use the following rate calculation (example 8%):

            $ bc -l <<< 'scale=27; e( l(1.08)/(60 * 60 * 24 * 365) )'

            A table of rates can also be found at:
            https://ipfs.io/ipfs/QmefQMseb3AiTapiAKKexdKHig8wroKuZbmLtPLv4u2YwW
        @param _rate   The accumulated rate (ex. 4% => 1000000001243680656318820312)
    */
    function setGlobalStabilityFee(uint256 _rate) public {
        require((_rate >= RAY) && (_rate <= RATES_ONE_HUNDRED_PCT));  // "LibDssExec/global-stability-fee-out-of-bounds"
        Fileable(jug()).file("base", _rate);
    }
    /**
        @dev Set the value of DAI in the reference asset (e.g. $1 per DAI). Value will be converted to the correct internal precision.
        @dev Equation used for conversion is value * RAY / 1000
        @param _value The value to set as integer (x1000) (ex. $1.025 == 1025)
    */
    function setDAIReferenceValue(uint256 _value) public {
        require(_value < WAD);  // "LibDssExec/incorrect-ilk-dunk-precision"
        Fileable(spotter()).file("par", rdiv(_value, 1000));
    }

    /*****************************/
    /*** Collateral Management ***/
    /*****************************/
    /**
        @dev Set a collateral debt ceiling. Amount will be converted to the correct internal precision.
        @param _ilk    The ilk to update (ex. bytes32("ETH-A"))
        @param _amount The amount to set in DAI (ex. 10m DAI amount == 10000000)
    */
    function setIlkDebtCeiling(bytes32 _ilk, uint256 _amount) public {
        require(_amount < WAD);  // "LibDssExec/incorrect-ilk-line-precision"
        Fileable(vat()).file(_ilk, "line", _amount * RAD);
    }
    /**
        @dev Increase a collateral debt ceiling. Amount will be converted to the correct internal precision.
        @param _ilk    The ilk to update (ex. bytes32("ETH-A"))
        @param _amount The amount to increase in DAI (ex. 10m DAI amount == 10000000)
        @param _global If true, increases the global debt ceiling by _amount
    */
    function increaseIlkDebtCeiling(bytes32 _ilk, uint256 _amount, bool _global) public {
        require(_amount < WAD);  // "LibDssExec/incorrect-ilk-line-precision"
        address _vat = vat();
        (,,,uint256 line_,) = DssVat(_vat).ilks(_ilk);
        Fileable(_vat).file(_ilk, "line", add(line_, _amount * RAD));
        if (_global) { increaseGlobalDebtCeiling(_amount); }
    }
    /**
        @dev Decrease a collateral debt ceiling. Amount will be converted to the correct internal precision.
        @param _ilk    The ilk to update (ex. bytes32("ETH-A"))
        @param _amount The amount to decrease in DAI (ex. 10m DAI amount == 10000000)
        @param _global If true, decreases the global debt ceiling by _amount
    */
    function decreaseIlkDebtCeiling(bytes32 _ilk, uint256 _amount, bool _global) public {
        require(_amount < WAD);  // "LibDssExec/incorrect-ilk-line-precision"
        address _vat = vat();
        (,,,uint256 line_,) = DssVat(_vat).ilks(_ilk);
        Fileable(_vat).file(_ilk, "line", sub(line_, _amount * RAD));
        if (_global) { decreaseGlobalDebtCeiling(_amount); }
    }
    /**
        @dev Set the parameters for an ilk in the "MCD_IAM_AUTO_LINE" auto-line
        @param _ilk    The ilk to update (ex. bytes32("ETH-A"))
        @param _amount The Maximum value (ex. 100m DAI amount == 100000000)
        @param _gap    The amount of Dai per step (ex. 5m Dai == 5000000)
        @param _ttl    The amount of time (in seconds)
    */
    function setIlkAutoLineParameters(bytes32 _ilk, uint256 _amount, uint256 _gap, uint256 _ttl) public {
        require(_amount < WAD);  // "LibDssExec/incorrect-auto-line-amount-precision"
        require(_gap < WAD);  // "LibDssExec/incorrect-auto-line-gap-precision"
        IAMLike(autoLine()).setIlk(_ilk, _amount * RAD, _gap * RAD, _ttl);
    }
    /**
        @dev Set the debt ceiling for an ilk in the "MCD_IAM_AUTO_LINE" auto-line without updating the time values
        @param _ilk    The ilk to update (ex. bytes32("ETH-A"))
        @param _amount The Maximum value (ex. 100m DAI amount == 100000000)
    */
    function setIlkAutoLineDebtCeiling(bytes32 _ilk, uint256 _amount) public {
        address _autoLine = autoLine();
        (, uint256 gap, uint48 ttl,,) = IAMLike(_autoLine).ilks(_ilk);
        require(gap != 0 && ttl != 0);  // "LibDssExec/auto-line-not-configured"
        IAMLike(_autoLine).setIlk(_ilk, _amount * RAD, uint256(gap), uint256(ttl));
    }
    /**
        @dev Remove an ilk in the "MCD_IAM_AUTO_LINE" auto-line
        @param _ilk    The ilk to remove (ex. bytes32("ETH-A"))
    */
    function removeIlkFromAutoLine(bytes32 _ilk) public {
        IAMLike(autoLine()).remIlk(_ilk);
    }
    /**
        @dev Set a collateral minimum vault amount. Amount will be converted to the correct internal precision.
        @param _ilk    The ilk to update (ex. bytes32("ETH-A"))
        @param _amount The amount to set in DAI (ex. 10m DAI amount == 10000000)
    */
    function setIlkMinVaultAmount(bytes32 _ilk, uint256 _amount) public {
        require(_amount < WAD);  // "LibDssExec/incorrect-ilk-dust-precision"
        Fileable(vat()).file(_ilk, "dust", _amount * RAD);
    }
    /**
        @dev Set a collateral liquidation penalty. Amount will be converted to the correct internal precision.
        @dev Equation used for conversion is (1 + pct / 10,000) * WAD
        @param _ilk    The ilk to update (ex. bytes32("ETH-A"))
        @param _pct_bps    The pct, in basis points, to set in integer form (x100). (ex. 10.25% = 10.25 * 100 = 1025)
    */
    function setIlkLiquidationPenalty(bytes32 _ilk, uint256 _pct_bps) public {
        require(_pct_bps < BPS_ONE_HUNDRED_PCT);  // "LibDssExec/incorrect-ilk-chop-precision"
        Fileable(cat()).file(_ilk, "chop", add(WAD, wdiv(_pct_bps, BPS_ONE_HUNDRED_PCT)));
    }
    /**
        @dev Set max DAI amount for liquidation per vault for collateral. Amount will be converted to the correct internal precision.
        @param _ilk    The ilk to update (ex. bytes32("ETH-A"))
        @param _amount The amount to set in DAI (ex. 10m DAI amount == 10000000)
    */
    function setIlkMaxLiquidationAmount(bytes32 _ilk, uint256 _amount) public {
        require(_amount < WAD);  // "LibDssExec/incorrect-ilk-dunk-precision"
        Fileable(cat()).file(_ilk, "dunk", _amount * RAD);
    }
    /**
        @dev Set a collateral liquidation ratio. Amount will be converted to the correct internal precision.
        @dev Equation used for conversion is pct * RAY / 10,000
        @param _ilk    The ilk to update (ex. bytes32("ETH-A"))
        @param _pct_bps    The pct, in basis points, to set in integer form (x100). (ex. 150% = 150 * 100 = 15000)
    */
    function setIlkLiquidationRatio(bytes32 _ilk, uint256 _pct_bps) public {
        require(_pct_bps < 10 * BPS_ONE_HUNDRED_PCT); // "LibDssExec/incorrect-ilk-mat-precision" // Fails if pct >= 1000%
        require(_pct_bps >= BPS_ONE_HUNDRED_PCT); // the liquidation ratio has to be bigger or equal to 100%
        Fileable(spotter()).file(_ilk, "mat", rdiv(_pct_bps, BPS_ONE_HUNDRED_PCT));
    }
    /**
        @dev Set minimum bid increase for collateral. Amount will be converted to the correct internal precision.
        @dev Equation used for conversion is (1 + pct / 10,000) * WAD
        @param _ilk   The ilk to update (ex. bytes32("ETH-A"))
        @param _pct_bps    The pct, in basis points, to set in integer form (x100). (ex. 5% = 5 * 100 = 500)
    */
    function setIlkMinAuctionBidIncrease(bytes32 _ilk, uint256 _pct_bps) public {
        require(_pct_bps < BPS_ONE_HUNDRED_PCT);  // "LibDssExec/incorrect-ilk-chop-precision"
        Fileable(flip(_ilk)).file("beg", add(WAD, wdiv(_pct_bps, BPS_ONE_HUNDRED_PCT)));
    }
    /**
        @dev Set bid duration for a collateral type.
        @param _ilk   The ilk to update (ex. bytes32("ETH-A"))
        @param _duration Amount of time for bids.
    */
    function setIlkBidDuration(bytes32 _ilk, uint256 _duration) public {
        Fileable(flip(_ilk)).file("ttl", _duration);
    }
    /**
        @dev Set auction duration for a collateral type.
        @param _ilk   The ilk to update (ex. bytes32("ETH-A"))
        @param _duration Amount of time for auctions.
    */
    function setIlkAuctionDuration(bytes32 _ilk, uint256 _duration) public {
        Fileable(flip(_ilk)).file("tau", _duration);
    }
    /**
        @dev Set the stability fee for a given ilk.
            Many of the settings that change weekly rely on the rate accumulator
            described at https://docs.makerdao.com/smart-contract-modules/rates-module
            To check this yourself, use the following rate calculation (example 8%):

            $ bc -l <<< 'scale=27; e( l(1.08)/(60 * 60 * 24 * 365) )'

            A table of rates can also be found at:
            https://ipfs.io/ipfs/QmefQMseb3AiTapiAKKexdKHig8wroKuZbmLtPLv4u2YwW

        @param _ilk    The ilk to update (ex. bytes32("ETH-A") )
        @param _rate   The accumulated rate (ex. 4% => 1000000001243680656318820312)
        @param _doDrip `true` to accumulate stability fees for the collateral
    */
    function setIlkStabilityFee(bytes32 _ilk, uint256 _rate, bool _doDrip) public {
        require((_rate >= RAY) && (_rate <= RATES_ONE_HUNDRED_PCT));  // "LibDssExec/ilk-stability-fee-out-of-bounds"
        address _jug = jug();
        if (_doDrip) Drippable(_jug).drip(_ilk);

        Fileable(_jug).file(_ilk, "duty", _rate);
    }


    /*************************/
    /*** Oracle Management ***/
    /*************************/