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// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../utils/FundDeployerOwnerMixin.sol";
import "../../utils/MathHelpers.sol";
import "../price-feeds/derivatives/AggregatedDerivativePriceFeedMixin.sol";
import "../price-feeds/derivatives/IDerivativePriceFeed.sol";
import "../price-feeds/primitives/ChainlinkPriceFeedMixin.sol";
import "./IValueInterpreter.sol";

/// @title ValueInterpreter Contract
/// @author Enzyme Council <[email protected]>
/// @notice Interprets price feeds to provide covert value between asset pairs
contract ValueInterpreter is
    IValueInterpreter,
    FundDeployerOwnerMixin,
    AggregatedDerivativePriceFeedMixin,
    ChainlinkPriceFeedMixin,
    MathHelpers
{
    using SafeMath for uint256;

    // Used to only tolerate a max rounding discrepancy of 0.01%
    // when converting values via an inverse rate
    uint256 private constant MIN_INVERSE_RATE_AMOUNT = 10000;

    constructor(
        address _fundDeployer,
        address _wethToken,
        uint256 _chainlinkStaleRateThreshold
    )
        public
        FundDeployerOwnerMixin(_fundDeployer)
        ChainlinkPriceFeedMixin(_wethToken, _chainlinkStaleRateThreshold)
    {}

    // EXTERNAL FUNCTIONS

    /// @notice Calculates the total value of given amounts of assets in a single quote asset
    /// @param _baseAssets The assets to convert
    /// @param _amounts The amounts of the _baseAssets to convert
    /// @param _quoteAsset The asset to which to convert
    /// @return value_ The sum value of _baseAssets, denominated in the _quoteAsset
    /// @dev Does not alter protocol state,
    /// but not a view because calls to price feeds can potentially update third party state.
    /// Does not handle a derivative quote asset.
    function calcCanonicalAssetsTotalValue(
        address[] memory _baseAssets,
        uint256[] memory _amounts,
        address _quoteAsset
    ) external override returns (uint256 value_) {
        require(
            _baseAssets.length == _amounts.length,
            "calcCanonicalAssetsTotalValue: Arrays unequal lengths"
        );
        require(
            isSupportedPrimitiveAsset(_quoteAsset),
            "calcCanonicalAssetsTotalValue: Unsupported _quoteAsset"
        );

        for (uint256 i; i < _baseAssets.length; i++) {
            uint256 assetValue = __calcAssetValue(_baseAssets[i], _amounts[i], _quoteAsset);
            value_ = value_.add(assetValue);
        }

        return value_;
    }

    // PUBLIC FUNCTIONS

    /// @notice Calculates the value of a given amount of one asset in terms of another asset
    /// @param _baseAsset The asset from which to convert
    /// @param _amount The amount of the _baseAsset to convert
    /// @param _quoteAsset The asset to which to convert
    /// @return value_ The equivalent quantity in the _quoteAsset
    /// @dev Does not alter protocol state,
    /// but not a view because calls to price feeds can potentially update third party state.
    /// See also __calcPrimitiveToDerivativeValue() for important notes regarding a derivative _quoteAsset.
    function calcCanonicalAssetValue(
        address _baseAsset,
        uint256 _amount,
        address _quoteAsset
    ) external override returns (uint256 value_) {
        if (_baseAsset == _quoteAsset || _amount == 0) {
            return _amount;
        }

        if (isSupportedPrimitiveAsset(_quoteAsset)) {
            return __calcAssetValue(_baseAsset, _amount, _quoteAsset);
        } else if (
            isSupportedDerivativeAsset(_quoteAsset) && isSupportedPrimitiveAsset(_baseAsset)
        ) {
            return __calcPrimitiveToDerivativeValue(_baseAsset, _amount, _quoteAsset);
        }

        revert("calcCanonicalAssetValue: Unsupported conversion");
    }

    /// @notice Checks whether an asset is a supported asset
    /// @param _asset The asset to check
    /// @return isSupported_ True if the asset is a supported asset
    function isSupportedAsset(address _asset) public view override returns (bool isSupported_) {
        return isSupportedPrimitiveAsset(_asset) || isSupportedDerivativeAsset(_asset);
    }

    // PRIVATE FUNCTIONS

    /// @dev Helper to differentially calculate an asset value
    /// based on if it is a primitive or derivative asset.
    function __calcAssetValue(
        address _baseAsset,
        uint256 _amount,
        address _quoteAsset
    ) private returns (uint256 value_) {
        if (_baseAsset == _quoteAsset || _amount == 0) {
            return _amount;
        }

        // Handle case that asset is a primitive
        if (isSupportedPrimitiveAsset(_baseAsset)) {
            return __calcCanonicalValue(_baseAsset, _amount, _quoteAsset);
        }

        // Handle case that asset is a derivative
        address derivativePriceFeed = getPriceFeedForDerivative(_baseAsset);
        if (derivativePriceFeed != address(0)) {
            return __calcDerivativeValue(derivativePriceFeed, _baseAsset, _amount, _quoteAsset);
        }

        revert("__calcAssetValue: Unsupported _baseAsset");
    }

    /// @dev Helper to calculate the value of a derivative in an arbitrary asset.
    /// Handles multiple underlying assets (e.g., Uniswap and Balancer pool tokens).
    /// Handles underlying assets that are also derivatives (e.g., a cDAI-ETH LP)
    function __calcDerivativeValue(
        address _derivativePriceFeed,
        address _derivative,
        uint256 _amount,
        address _quoteAsset
    ) private returns (uint256 value_) {
        (address[] memory underlyings, uint256[] memory underlyingAmounts) = IDerivativePriceFeed(
            _derivativePriceFeed
        )
            .calcUnderlyingValues(_derivative, _amount);

        require(underlyings.length > 0, "__calcDerivativeValue: No underlyings");
        require(
            underlyings.length == underlyingAmounts.length,
            "__calcDerivativeValue: Arrays unequal lengths"
        );

        for (uint256 i = 0; i < underlyings.length; i++) {
            uint256 underlyingValue = __calcAssetValue(
                underlyings[i],
                underlyingAmounts[i],
                _quoteAsset
            );

            value_ = value_.add(underlyingValue);
        }
    }

    /// @dev Helper to calculate the value of a primitive base asset in a derivative quote asset.
    /// Assumes that the _primitiveBaseAsset and _derivativeQuoteAsset have been validated as supported.
    /// Callers of this function should be aware of the following points, and take precautions as-needed,
    /// such as prohibiting a derivative quote asset:
    /// - The returned value will be slightly less the actual canonical value due to the conversion formula's
    /// handling of the intermediate inverse rate (see comments below).
    /// - If the assets involved have an extreme rate and/or have a low ERC20.decimals() value,
    /// the inverse rate might not be considered "sufficient", and will revert.
    function __calcPrimitiveToDerivativeValue(
        address _primitiveBaseAsset,
        uint256 _primitiveBaseAssetAmount,
        address _derivativeQuoteAsset
    ) private returns (uint256 value_) {
        uint256 derivativeUnit = 10**uint256(ERC20(_derivativeQuoteAsset).decimals());

        address derivativePriceFeed = getPriceFeedForDerivative(_derivativeQuoteAsset);
        uint256 primitiveAmountForDerivativeUnit = __calcDerivativeValue(
            derivativePriceFeed,
            _derivativeQuoteAsset,
            derivativeUnit,
            _primitiveBaseAsset
        );
        // Only tolerate a max rounding discrepancy
        require(
            primitiveAmountForDerivativeUnit > MIN_INVERSE_RATE_AMOUNT,
            "__calcPrimitiveToDerivativeValue: Insufficient rate"
        );

        // Adds `1` to primitiveAmountForDerivativeUnit so that the final return value is
        // slightly less than the actual value, which is congruent with how all other
        // asset conversions are floored in the protocol.
        return
            __calcRelativeQuantity(
                primitiveAmountForDerivativeUnit.add(1),
                derivativeUnit,
                _primitiveBaseAssetAmount
            );
    }

    ////////////////////////////
    // PRIMITIVES (CHAINLINK) //
    ////////////////////////////

    /// @notice Adds a list of primitives with the given aggregator and rateAsset values
    /// @param _primitives The primitives to add
    /// @param _aggregators The ordered aggregators corresponding to the list of _primitives
    /// @param _rateAssets The ordered rate assets corresponding to the list of _primitives
    function addPrimitives(
        address[] calldata _primitives,
        address[] calldata _aggregators,
        RateAsset[] calldata _rateAssets
    ) external onlyFundDeployerOwner {
        __addPrimitives(_primitives, _aggregators, _rateAssets);
    }

    /// @notice Removes a list of primitives from the feed
    /// @param _primitives The primitives to remove
    function removePrimitives(address[] calldata _primitives) external onlyFundDeployerOwner {
        __removePrimitives(_primitives);
    }

    /// @notice Sets the `ehUsdAggregator` variable value
    /// @param _nextEthUsdAggregator The `ehUsdAggregator` value to set
    function setEthUsdAggregator(address _nextEthUsdAggregator) external onlyFundDeployerOwner {
        __setEthUsdAggregator(_nextEthUsdAggregator);
    }

    /// @notice Updates a list of primitives with the given aggregator and rateAsset values
    /// @param _primitives The primitives to update
    /// @param _aggregators The ordered aggregators corresponding to the list of _primitives
    /// @param _rateAssets The ordered rate assets corresponding to the list of _primitives
    function updatePrimitives(
        address[] calldata _primitives,
        address[] calldata _aggregators,
        RateAsset[] calldata _rateAssets
    ) external onlyFundDeployerOwner {
        __removePrimitives(_primitives);
        __addPrimitives(_primitives, _aggregators, _rateAssets);
    }

    // PUBLIC FUNCTIONS

    /// @notice Checks whether an asset is a supported primitive
    /// @param _asset The asset to check
    /// @return isSupported_ True if the asset is a supported primitive
    function isSupportedPrimitiveAsset(address _asset)
        public
        view
        override
        returns (bool isSupported_)
    {
        return _asset == getWethToken() || getAggregatorForPrimitive(_asset) != address(0);
    }

    ////////////////////////////////////
    // DERIVATIVE PRICE FEED REGISTRY //
    ////////////////////////////////////

    /// @notice Adds a list of derivatives with the given price feed values
    /// @param _derivatives The derivatives to add
    /// @param _priceFeeds The ordered price feeds corresponding to the list of _derivatives
    function addDerivatives(address[] calldata _derivatives, address[] calldata _priceFeeds)
        external
        onlyFundDeployerOwner
    {
        __addDerivatives(_derivatives, _priceFeeds);
    }

    /// @notice Removes a list of derivatives
    /// @param _derivatives The derivatives to remove
    function removeDerivatives(address[] calldata _derivatives) external onlyFundDeployerOwner {
        __removeDerivatives(_derivatives);
    }

    /// @notice Updates a list of derivatives with the given price feed values
    /// @param _derivatives The derivatives to update
    /// @param _priceFeeds The ordered price feeds corresponding to the list of _derivatives
    function updateDerivatives(address[] calldata _derivatives, address[] calldata _priceFeeds)
        external
        onlyFundDeployerOwner
    {
        __removeDerivatives(_derivatives);
        __addDerivatives(_derivatives, _priceFeeds);
    }

    // PUBLIC FUNCTIONS

    /// @notice Checks whether an asset is a supported derivative
    /// @param _asset The asset to check
    /// @return isSupported_ True if the asset is a supported derivative
    function isSupportedDerivativeAsset(address _asset)
        public
        view
        override
        returns (bool isSupported_)
    {
        return getPriceFeedForDerivative(_asset) != address(0);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b > a) return (false, 0);
        return (true, a - b);
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) return (true, 0);
        uint256 c = a * b;
        if (c / a != b) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a / b);
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a % b);
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a, "SafeMath: subtraction overflow");
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) return 0;
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: modulo by zero");
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        return a - b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryDiv}.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a % b;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "../../utils/Context.sol";
import "./IERC20.sol";
import "../../math/SafeMath.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin guidelines: functions revert instead
 * of returning `false` on failure. This behavior is nonetheless conventional
 * and does not conflict with the expectations of ERC20 applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20 {
    using SafeMath for uint256;

    mapping (address => uint256) private _balances;

    mapping (address => mapping (address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;
    uint8 private _decimals;

    /**
     * @dev Sets the values for {name} and {symbol}, initializes {decimals} with
     * a default value of 18.
     *
     * To select a different value for {decimals}, use {_setupDecimals}.
     *
     * All three of these values are immutable: they can only be set once during
     * construction.
     */
    constructor (string memory name_, string memory symbol_) public {
        _name = name_;
        _symbol = symbol_;
        _decimals = 18;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5,05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
     * called.
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual returns (uint8) {
        return _decimals;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * Requirements:
     *
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }

    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(address sender, address recipient, uint256 amount) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Sets {decimals} to a value other than the default one of 18.
     *
     * WARNING: This function should only be called from the constructor. Most
     * applications that interact with token contracts will not expect
     * {decimals} to ever change, and may work incorrectly if it does.
     */
    function _setupDecimals(uint8 decimals_) internal virtual {
        _decimals = decimals_;
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be to transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <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 GSN 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 payable) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title IFundDeployer Interface
/// @author Enzyme Council <[email protected]>
interface IFundDeployer {
    function getOwner() external view returns (address);

    function hasReconfigurationRequest(address) external view returns (bool);

    function isAllowedBuySharesOnBehalfCaller(address) external view returns (bool);

    function isAllowedVaultCall(
        address,
        bytes4,
        bytes32
    ) external view returns (bool);
}

// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "./IDerivativePriceFeed.sol";

/// @title AggregatedDerivativePriceFeedMixin Contract
/// @author Enzyme Council <[email protected]>
/// @notice Aggregates multiple derivative price feeds (e.g., Compound, Chai) and dispatches
/// rate requests to the appropriate feed
abstract contract AggregatedDerivativePriceFeedMixin {
    event DerivativeAdded(address indexed derivative, address priceFeed);

    event DerivativeRemoved(address indexed derivative);

    mapping(address => address) private derivativeToPriceFeed;

    /// @notice Gets the rates for 1 unit of the derivative to its underlying assets
    /// @param _derivative The derivative for which to get the rates
    /// @return underlyings_ The underlying assets for the _derivative
    /// @return underlyingAmounts_ The rates for the _derivative to the underlyings_
    function __calcUnderlyingValues(address _derivative, uint256 _derivativeAmount)
        internal
        returns (address[] memory underlyings_, uint256[] memory underlyingAmounts_)
    {
        address derivativePriceFeed = getPriceFeedForDerivative(_derivative);
        require(
            derivativePriceFeed != address(0),
            "calcUnderlyingValues: _derivative is not supported"
        );

        return
            IDerivativePriceFeed(derivativePriceFeed).calcUnderlyingValues(
                _derivative,
                _derivativeAmount
            );
    }

    //////////////////////////
    // DERIVATIVES REGISTRY //
    //////////////////////////

    /// @notice Adds a list of derivatives with the given price feed values
    /// @param _derivatives The derivatives to add
    /// @param _priceFeeds The ordered price feeds corresponding to the list of _derivatives
    function __addDerivatives(address[] memory _derivatives, address[] memory _priceFeeds)
        internal
    {
        require(
            _derivatives.length == _priceFeeds.length,
            "__addDerivatives: Unequal _derivatives and _priceFeeds array lengths"
        );

        for (uint256 i = 0; i < _derivatives.length; i++) {
            require(
                getPriceFeedForDerivative(_derivatives[i]) == address(0),
                "__addDerivatives: Already added"
            );

            __validateDerivativePriceFeed(_derivatives[i], _priceFeeds[i]);

            derivativeToPriceFeed[_derivatives[i]] = _priceFeeds[i];

            emit DerivativeAdded(_derivatives[i], _priceFeeds[i]);
        }
    }

    /// @notice Removes a list of derivatives
    /// @param _derivatives The derivatives to remove
    function __removeDerivatives(address[] memory _derivatives) internal {
        for (uint256 i = 0; i < _derivatives.length; i++) {
            require(
                getPriceFeedForDerivative(_derivatives[i]) != address(0),
                "removeDerivatives: Derivative not yet added"
            );

            delete derivativeToPriceFeed[_derivatives[i]];

            emit DerivativeRemoved(_derivatives[i]);
        }
    }

    // PRIVATE FUNCTIONS

    /// @dev Helper to validate a derivative price feed
    function __validateDerivativePriceFeed(address _derivative, address _priceFeed) private view {
        require(
            IDerivativePriceFeed(_priceFeed).isSupportedAsset(_derivative),
            "__validateDerivativePriceFeed: Unsupported derivative"
        );
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the registered price feed for a given derivative
    /// @return priceFeed_ The price feed contract address
    function getPriceFeedForDerivative(address _derivative)
        public
        view
        returns (address priceFeed_)
    {
        return derivativeToPriceFeed[_derivative];
    }
}

// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title IDerivativePriceFeed Interface
/// @author Enzyme Council <[email protected]>
/// @notice Simple interface for derivative price source oracle implementations
interface IDerivativePriceFeed {
    function calcUnderlyingValues(address, uint256)
        external
        returns (address[] memory, uint256[] memory);

    function isSupportedAsset(address) external view returns (bool);
}

// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../../../interfaces/IChainlinkAggregator.sol";

/// @title ChainlinkPriceFeedMixin Contract
/// @author Enzyme Council <[email protected]>
/// @notice A price feed that uses Chainlink oracles as price sources
abstract contract ChainlinkPriceFeedMixin {
    using SafeMath for uint256;

    event EthUsdAggregatorSet(address prevEthUsdAggregator, address nextEthUsdAggregator);

    event PrimitiveAdded(
        address indexed primitive,
        address aggregator,
        RateAsset rateAsset,
        uint256 unit
    );

    event PrimitiveRemoved(address indexed primitive);

    enum RateAsset {ETH, USD}

    struct AggregatorInfo {
        address aggregator;
        RateAsset rateAsset;
    }

    uint256 private constant ETH_UNIT = 10**18;

    uint256 private immutable STALE_RATE_THRESHOLD;
    address private immutable WETH_TOKEN;

    address private ethUsdAggregator;
    mapping(address => AggregatorInfo) private primitiveToAggregatorInfo;
    mapping(address => uint256) private primitiveToUnit;

    constructor(address _wethToken, uint256 _staleRateThreshold) public {
        STALE_RATE_THRESHOLD = _staleRateThreshold;
        WETH_TOKEN = _wethToken;
    }

    // INTERNAL FUNCTIONS

    /// @notice Calculates the value of a base asset in terms of a quote asset (using a canonical rate)
    /// @param _baseAsset The base asset
    /// @param _baseAssetAmount The base asset amount to convert
    /// @param _quoteAsset The quote asset
    /// @return quoteAssetAmount_ The equivalent quote asset amount
    function __calcCanonicalValue(
        address _baseAsset,
        uint256 _baseAssetAmount,
        address _quoteAsset
    ) internal view returns (uint256 quoteAssetAmount_) {
        // Case where _baseAsset == _quoteAsset is handled by ValueInterpreter

        int256 baseAssetRate = __getLatestRateData(_baseAsset);
        require(baseAssetRate > 0, "__calcCanonicalValue: Invalid base asset rate");

        int256 quoteAssetRate = __getLatestRateData(_quoteAsset);
        require(quoteAssetRate > 0, "__calcCanonicalValue: Invalid quote asset rate");

        return
            __calcConversionAmount(
                _baseAsset,
                _baseAssetAmount,
                uint256(baseAssetRate),
                _quoteAsset,
                uint256(quoteAssetRate)
            );
    }

    /// @dev Helper to set the `ethUsdAggregator` value
    function __setEthUsdAggregator(address _nextEthUsdAggregator) internal {
        address prevEthUsdAggregator = getEthUsdAggregator();
        require(
            _nextEthUsdAggregator != prevEthUsdAggregator,
            "__setEthUsdAggregator: Value already set"
        );

        __validateAggregator(_nextEthUsdAggregator);

        ethUsdAggregator = _nextEthUsdAggregator;

        emit EthUsdAggregatorSet(prevEthUsdAggregator, _nextEthUsdAggregator);
    }

    // PRIVATE FUNCTIONS

    /// @dev Helper to convert an amount from a _baseAsset to a _quoteAsset
    function __calcConversionAmount(
        address _baseAsset,
        uint256 _baseAssetAmount,
        uint256 _baseAssetRate,
        address _quoteAsset,
        uint256 _quoteAssetRate
    ) private view returns (uint256 quoteAssetAmount_) {
        RateAsset baseAssetRateAsset = getRateAssetForPrimitive(_baseAsset);
        RateAsset quoteAssetRateAsset = getRateAssetForPrimitive(_quoteAsset);
        uint256 baseAssetUnit = getUnitForPrimitive(_baseAsset);
        uint256 quoteAssetUnit = getUnitForPrimitive(_quoteAsset);

        // If rates are both in ETH or both in USD
        if (baseAssetRateAsset == quoteAssetRateAsset) {
            return
                __calcConversionAmountSameRateAsset(
                    _baseAssetAmount,
                    baseAssetUnit,
                    _baseAssetRate,
                    quoteAssetUnit,
                    _quoteAssetRate
                );
        }

        (, int256 ethPerUsdRate, , uint256 ethPerUsdRateLastUpdatedAt, ) = IChainlinkAggregator(
            getEthUsdAggregator()
        )
            .latestRoundData();
        require(ethPerUsdRate > 0, "__calcConversionAmount: Bad ethUsd rate");
        __validateRateIsNotStale(ethPerUsdRateLastUpdatedAt);

        // If _baseAsset's rate is in ETH and _quoteAsset's rate is in USD
        if (baseAssetRateAsset == RateAsset.ETH) {
            return
                __calcConversionAmountEthRateAssetToUsdRateAsset(
                    _baseAssetAmount,
                    baseAssetUnit,
                    _baseAssetRate,
                    quoteAssetUnit,
                    _quoteAssetRate,
                    uint256(ethPerUsdRate)
                );
        }

        // If _baseAsset's rate is in USD and _quoteAsset's rate is in ETH
        return
            __calcConversionAmountUsdRateAssetToEthRateAsset(
                _baseAssetAmount,
                baseAssetUnit,
                _baseAssetRate,
                quoteAssetUnit,
                _quoteAssetRate,
                uint256(ethPerUsdRate)
            );
    }

    /// @dev Helper to convert amounts where the base asset has an ETH rate and the quote asset has a USD rate
    function __calcConversionAmountEthRateAssetToUsdRateAsset(
        uint256 _baseAssetAmount,
        uint256 _baseAssetUnit,
        uint256 _baseAssetRate,
        uint256 _quoteAssetUnit,
        uint256 _quoteAssetRate,
        uint256 _ethPerUsdRate
    ) private pure returns (uint256 quoteAssetAmount_) {
        // Only allows two consecutive multiplication operations to avoid potential overflow.
        // Intermediate step needed to resolve stack-too-deep error.
        uint256 intermediateStep = _baseAssetAmount.mul(_baseAssetRate).mul(_ethPerUsdRate).div(
            ETH_UNIT
        );

        return intermediateStep.mul(_quoteAssetUnit).div(_baseAssetUnit).div(_quoteAssetRate);
    }

    /// @dev Helper to convert amounts where base and quote assets both have ETH rates or both have USD rates
    function __calcConversionAmountSameRateAsset(
        uint256 _baseAssetAmount,
        uint256 _baseAssetUnit,
        uint256 _baseAssetRate,
        uint256 _quoteAssetUnit,
        uint256 _quoteAssetRate
    ) private pure returns (uint256 quoteAssetAmount_) {
        // Only allows two consecutive multiplication operations to avoid potential overflow
        return
            _baseAssetAmount.mul(_baseAssetRate).mul(_quoteAssetUnit).div(
                _baseAssetUnit.mul(_quoteAssetRate)
            );
    }

    /// @dev Helper to convert amounts where the base asset has a USD rate and the quote asset has an ETH rate
    function __calcConversionAmountUsdRateAssetToEthRateAsset(
        uint256 _baseAssetAmount,
        uint256 _baseAssetUnit,
        uint256 _baseAssetRate,
        uint256 _quoteAssetUnit,
        uint256 _quoteAssetRate,
        uint256 _ethPerUsdRate
    ) private pure returns (uint256 quoteAssetAmount_) {
        // Only allows two consecutive multiplication operations to avoid potential overflow
        // Intermediate step needed to resolve stack-too-deep error.
        uint256 intermediateStep = _baseAssetAmount.mul(_baseAssetRate).mul(_quoteAssetUnit).div(
            _ethPerUsdRate
        );

        return intermediateStep.mul(ETH_UNIT).div(_baseAssetUnit).div(_quoteAssetRate);
    }

    /// @dev Helper to get the latest rate for a given primitive
    function __getLatestRateData(address _primitive) private view returns (int256 rate_) {
        if (_primitive == getWethToken()) {
            return int256(ETH_UNIT);
        }

        address aggregator = getAggregatorForPrimitive(_primitive);
        require(aggregator != address(0), "__getLatestRateData: Primitive does not exist");

        uint256 rateUpdatedAt;
        (, rate_, , rateUpdatedAt, ) = IChainlinkAggregator(aggregator).latestRoundData();
        __validateRateIsNotStale(rateUpdatedAt);

        return rate_;
    }

    /// @dev Helper to validate that a rate is not from a round considered to be stale
    function __validateRateIsNotStale(uint256 _latestUpdatedAt) private view {
        require(
            _latestUpdatedAt >= block.timestamp.sub(getStaleRateThreshold()),
            "__validateRateIsNotStale: Stale rate detected"
        );
    }

    /////////////////////////
    // PRIMITIVES REGISTRY //
    /////////////////////////

    /// @notice Adds a list of primitives with the given aggregator and rateAsset values
    /// @param _primitives The primitives to add
    /// @param _aggregators The ordered aggregators corresponding to the list of _primitives
    /// @param _rateAssets The ordered rate assets corresponding to the list of _primitives
    function __addPrimitives(
        address[] calldata _primitives,
        address[] calldata _aggregators,
        RateAsset[] calldata _rateAssets
    ) internal {
        require(
            _primitives.length == _aggregators.length,
            "__addPrimitives: Unequal _primitives and _aggregators array lengths"
        );
        require(
            _primitives.length == _rateAssets.length,
            "__addPrimitives: Unequal _primitives and _rateAssets array lengths"
        );

        for (uint256 i; i < _primitives.length; i++) {
            require(
                getAggregatorForPrimitive(_primitives[i]) == address(0),
                "__addPrimitives: Value already set"
            );

            __validateAggregator(_aggregators[i]);

            primitiveToAggregatorInfo[_primitives[i]] = AggregatorInfo({
                aggregator: _aggregators[i],
                rateAsset: _rateAssets[i]
            });

            // Store the amount that makes up 1 unit given the asset's decimals
            uint256 unit = 10**uint256(ERC20(_primitives[i]).decimals());
            primitiveToUnit[_primitives[i]] = unit;

            emit PrimitiveAdded(_primitives[i], _aggregators[i], _rateAssets[i], unit);
        }
    }

    /// @notice Removes a list of primitives from the feed
    /// @param _primitives The primitives to remove
    function __removePrimitives(address[] calldata _primitives) internal {
        for (uint256 i; i < _primitives.length; i++) {
            require(
                getAggregatorForPrimitive(_primitives[i]) != address(0),
                "__removePrimitives: Primitive not yet added"
            );

            delete primitiveToAggregatorInfo[_primitives[i]];
            delete primitiveToUnit[_primitives[i]];

            emit PrimitiveRemoved(_primitives[i]);
        }
    }

    // PRIVATE FUNCTIONS

    /// @dev Helper to validate an aggregator by checking its return values for the expected interface
    function __validateAggregator(address _aggregator) private view {
        (, int256 answer, , uint256 updatedAt, ) = IChainlinkAggregator(_aggregator)
            .latestRoundData();
        require(answer > 0, "__validateAggregator: No rate detected");
        __validateRateIsNotStale(updatedAt);
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the aggregator for a primitive
    /// @param _primitive The primitive asset for which to get the aggregator value
    /// @return aggregator_ The aggregator address
    function getAggregatorForPrimitive(address _primitive)
        public
        view
        returns (address aggregator_)
    {
        return primitiveToAggregatorInfo[_primitive].aggregator;
    }

    /// @notice Gets the `ethUsdAggregator` variable value
    /// @return ethUsdAggregator_ The `ethUsdAggregator` variable value
    function getEthUsdAggregator() public view returns (address ethUsdAggregator_) {
        return ethUsdAggregator;
    }

    /// @notice Gets the rateAsset variable value for a primitive
    /// @return rateAsset_ The rateAsset variable value
    /// @dev This isn't strictly necessary as WETH_TOKEN will be undefined and thus
    /// the RateAsset will be the 0-position of the enum (i.e. ETH), but it makes the
    /// behavior more explicit
    function getRateAssetForPrimitive(address _primitive)
        public
        view
        returns (RateAsset rateAsset_)
    {
        if (_primitive == getWethToken()) {
            return RateAsset.ETH;
        }

        return primitiveToAggregatorInfo[_primitive].rateAsset;
    }

    /// @notice Gets the `STALE_RATE_THRESHOLD` variable value
    /// @return staleRateThreshold_ The `STALE_RATE_THRESHOLD` value
    function getStaleRateThreshold() public view returns (uint256 staleRateThreshold_) {
        return STALE_RATE_THRESHOLD;
    }

    /// @notice Gets the unit variable value for a primitive
    /// @return unit_ The unit variable value
    function getUnitForPrimitive(address _primitive) public view returns (uint256 unit_) {
        if (_primitive == getWethToken()) {
            return ETH_UNIT;
        }

        return primitiveToUnit[_primitive];
    }

    /// @notice Gets the `WETH_TOKEN` variable value
    /// @return wethToken_ The `WETH_TOKEN` variable value
    function getWethToken() public view returns (address wethToken_) {
        return WETH_TOKEN;
    }
}

// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title IValueInterpreter interface
/// @author Enzyme Council <[email protected]>
/// @notice Interface for ValueInterpreter
interface IValueInterpreter {
    function calcCanonicalAssetValue(
        address,
        uint256,
        address
    ) external returns (uint256);

    function calcCanonicalAssetsTotalValue(
        address[] calldata,
        uint256[] calldata,
        address
    ) external returns (uint256);

    function isSupportedAsset(address) external view returns (bool);

    function isSupportedDerivativeAsset(address) external view returns (bool);

    function isSupportedPrimitiveAsset(address) external view returns (bool);
}

// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title IChainlinkAggregator Interface
/// @author Enzyme Council <[email protected]>
interface IChainlinkAggregator {
    function latestRoundData()
        external
        view
        returns (
            uint80,
            int256,
            uint256,
            uint256,
            uint80
        );
}

// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../core/fund-deployer/IFundDeployer.sol";

/// @title FundDeployerOwnerMixin Contract
/// @author Enzyme Council <[email protected]>
/// @notice A mixin contract that defers ownership to the owner of FundDeployer
abstract contract FundDeployerOwnerMixin {
    address internal immutable FUND_DEPLOYER;

    modifier onlyFundDeployerOwner() {
        require(
            msg.sender == getOwner(),
            "onlyFundDeployerOwner: Only the FundDeployer owner can call this function"
        );
        _;
    }

    constructor(address _fundDeployer) public {
        FUND_DEPLOYER = _fundDeployer;
    }

    /// @notice Gets the owner of this contract
    /// @return owner_ The owner
    /// @dev Ownership is deferred to the owner of the FundDeployer contract
    function getOwner() public view returns (address owner_) {
        return IFundDeployer(FUND_DEPLOYER).getOwner();
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the `FUND_DEPLOYER` variable
    /// @return fundDeployer_ The `FUND_DEPLOYER` variable value
    function getFundDeployer() public view returns (address fundDeployer_) {
        return FUND_DEPLOYER;
    }
}

// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/math/SafeMath.sol";

/// @title MathHelpers Contract
/// @author Enzyme Council <[email protected]>
/// @notice Helper functions for common math operations
abstract contract MathHelpers {
    using SafeMath for uint256;

    /// @dev Calculates a proportional value relative to a known ratio.
    /// Caller is responsible as-necessary for:
    /// 1. validating _quantity1 to be non-zero
    /// 2. validating relativeQuantity2_ to be non-zero
    function __calcRelativeQuantity(
        uint256 _quantity1,
        uint256 _quantity2,
        uint256 _relativeQuantity1
    ) internal pure returns (uint256 relativeQuantity2_) {
        return _relativeQuantity1.mul(_quantity2).div(_quantity1);
    }
}

{
  "evmVersion": "istanbul",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs",
    "useLiteralContent": true
  },
  "optimizer": {
    "details": {
      "constantOptimizer": true,
      "cse": true,
      "deduplicate": true,
      "jumpdestRemover": true,
      "orderLiterals": true,
      "peephole": true,
      "yul": false
    },
    "runs": 200
  },
  "remappings": [],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"_fundDeployer","type":"address"},{"internalType":"address","name":"_wethToken","type":"address"},{"internalType":"uint256","name":"_chainlinkStaleRateThreshold","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"derivative","type":"address"},{"indexed":false,"internalType":"address","name":"priceFeed","type":"address"}],"name":"DerivativeAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"derivative","type":"address"}],"name":"DerivativeRemoved","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"prevEthUsdAggregator","type":"address"},{"indexed":false,"internalType":"address","name":"nextEthUsdAggregator","type":"address"}],"name":"EthUsdAggregatorSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"primitive","type":"address"},{"indexed":false,"internalType":"address","name":"aggregator","type":"address"},{"indexed":false,"internalType":"enum ChainlinkPriceFeedMixin.RateAsset","name":"rateAsset","type":"uint8"},{"indexed":false,"internalType":"uint256","name":"unit","type":"uint256"}],"name":"PrimitiveAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"primitive","type":"address"}],"name":"PrimitiveRemoved","type":"event"},{"inputs":[{"internalType":"address[]","name":"_derivatives","type":"address[]"},{"internalType":"address[]","name":"_priceFeeds","type":"address[]"}],"name":"addDerivatives","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"_primitives","type":"address[]"},{"internalType":"address[]","name":"_aggregators","type":"address[]"},{"internalType":"enum ChainlinkPriceFeedMixin.RateAsset[]","name":"_rateAssets","type":"uint8[]"}],"name":"addPrimitives","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_baseAsset","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"address","name":"_quoteAsset","type":"address"}],"name":"calcCanonicalAssetValue","outputs":[{"internalType":"uint256","name":"value_","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"_baseAssets","type":"address[]"},{"internalType":"uint256[]","name":"_amounts","type":"uint256[]"},{"internalType":"address","name":"_quoteAsset","type":"address"}],"name":"calcCanonicalAssetsTotalValue","outputs":[{"internalType":"uint256","name":"value_","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_primitive","type":"address"}],"name":"getAggregatorForPrimitive","outputs":[{"internalType":"address","name":"aggregator_","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getEthUsdAggregator","outputs":[{"internalType":"address","name":"ethUsdAggregator_","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getFundDeployer","outputs":[{"internalType":"address","name":"fundDeployer_","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getOwner","outputs":[{"internalType":"address","name":"owner_","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_derivative","type":"address"}],"name":"getPriceFeedForDerivative","outputs":[{"internalType":"address","name":"priceFeed_","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_primitive","type":"address"}],"name":"getRateAssetForPrimitive","outputs":[{"internalType":"enum ChainlinkPriceFeedMixin.RateAsset","name":"rateAsset_","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getStaleRateThreshold","outputs":[{"internalType":"uint256","name":"staleRateThreshold_","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_primitive","type":"address"}],"name":"getUnitForPrimitive","outputs":[{"internalType":"uint256","name":"unit_","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getWethToken","outputs":[{"internalType":"address","name":"wethToken_","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_asset","type":"address"}],"name":"isSupportedAsset","outputs":[{"internalType":"bool","name":"isSupported_","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_asset","type":"address"}],"name":"isSupportedDerivativeAsset","outputs":[{"internalType":"bool","name":"isSupported_","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_asset","type":"address"}],"name":"isSupportedPrimitiveAsset","outputs":[{"internalType":"bool","name":"isSupported_","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address[]","name":"_derivatives","type":"address[]"}],"name":"removeDerivatives","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"_primitives","type":"address[]"}],"name":"removePrimitives","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_nextEthUsdAggregator","type":"address"}],"name":"setEthUsdAggregator","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"_derivatives","type":"address[]"},{"internalType":"address[]","name":"_priceFeeds","type":"address[]"}],"name":"updateDerivatives","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"_primitives","type":"address[]"},{"internalType":"address[]","name":"_aggregators","type":"address[]"},{"internalType":"enum ChainlinkPriceFeedMixin.RateAsset[]","name":"_rateAssets","type":"uint8[]"}],"name":"updatePrimitives","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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0000000000000000000000004f1c53f096533c04d8157efb6bca3eb22ddc6360000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc20000000000000000000000000000000000000000000000000000000000015f90

-----Decoded View---------------
Arg [0] : _fundDeployer (address): 0x4f1C53F096533C04d8157EFB6Bca3eb22ddC6360
Arg [1] : _wethToken (address): 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2
Arg [2] : _chainlinkStaleRateThreshold (uint256): 90000

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 0000000000000000000000004f1c53f096533c04d8157efb6bca3eb22ddc6360
Arg [1] : 000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2
Arg [2] : 0000000000000000000000000000000000000000000000000000000000015f90