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// File: contracts/ComptrollerInterface.sol
pragma solidity ^0.5.8;
interface ComptrollerInterface {
    /**
     * @notice Marker function used for light validation when updating the comptroller of a market
     * @dev Implementations should simply return true.
     * @return true
     */
    function isComptroller() external view returns (bool);
    /*** Assets You Are In ***/
    function enterMarkets(address[] calldata cTokens) external returns (uint[] memory);
    function exitMarket(address cToken) external returns (uint);
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pragma solidity ^0.4.13;
////// lib/ds-math/src/math.sol
/// math.sol -- mixin for inline numerical wizardry
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
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// File: contracts/CarefulMath.sol
pragma solidity ^0.5.8;
/**
  * @title Careful Math
  * @author Compound
  * @notice Derived from OpenZeppelin's SafeMath library
  *         https://github.com/OpenZeppelin/openzeppelin-solidity/blob/master/contracts/math/SafeMath.sol
  */
contract CarefulMath {
    /**
     * @dev Possible error codes that we can return
     */
    enum MathError {
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// File: contracts/ErrorReporter.sol
pragma solidity ^0.5.8;
contract ComptrollerErrorReporter {
    enum Error {
        NO_ERROR,
        UNAUTHORIZED,
        COMPTROLLER_MISMATCH,
        INSUFFICIENT_SHORTFALL,
        INSUFFICIENT_LIQUIDITY,
        INVALID_CLOSE_FACTOR,
        INVALID_COLLATERAL_FACTOR,
        INVALID_LIQUIDATION_INCENTIVE,
        MARKET_NOT_ENTERED,
        MARKET_NOT_LISTED,
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{"CarefulMath.sol":{"content":"pragma solidity ^0.5.8;\n\n/**\n  * @title Careful Math\n  * @author Compound\n  * @notice Derived from 
    OpenZeppelin\u0027s SafeMath library\n  *         https://github.com/OpenZeppelin/openzeppelin-solidity/blob/master/contracts/math/SafeMath.sol\n  
    */\ncontract CarefulMath {\n\n    /**\n     * @dev Possible error codes that we can return\n     */\n    enum MathError {\n        NO_ERROR,\n     
       DIVISION_BY_ZERO,\n        INTEGER_OVERFLOW,\n        INTEGER_UNDERFLOW\n    }\n\n    /**\n    * @dev Multiplies two numbers, returns an error 
    on overflow.\n    */\n    function mulUInt(uint a, uint b) internal pure returns (MathError, uint) {\n        if (a == 0) {\n            return 
    (MathError.NO_ERROR, 0);\n        }\n\n        uint c = a * b;\n\n        if (c / a != b) {\n            return (MathError.INTEGER_OVERFLOW, 0);\n 
           } else {\n            return (MathError.NO_ERROR, c);\n        }\n    }\n\n    /**\n    * @dev Integer division of two numbers, truncating 
    the quotient.\n    */\n    function divUInt(uint a, uint b) internal pure returns (MathError, uint) {\n        if (b == 0) {\n            return 
    (MathError.DIVISION_BY_ZERO, 0);\n        }\n\n        return (MathError.NO_ERROR, a / b);\n    }\n\n    /**\n    * @dev Subtracts two numbers, 
    returns an error on overflow (i.e. if subtrahend is greater than minuend).\n    */\n    function subUInt(uint a, uint b) internal pure returns 
    (MathError, uint) {\n        if (b \u003c= a) {\n            return (MathError.NO_ERROR, a - b);\n        } else {\n            return (MathError
    .INTEGER_UNDERFLOW, 0);\n        }\n    }\n\n    /**\n    * @dev Adds two numbers, returns an error on overflow.\n    */\n    function addUInt(uint 
    a, uint b) internal pure returns (MathError, uint) {\n        uint c = a + b;\n\n        if (c \u003e= a) {\n            return (MathError.NO_ERROR
    , c);\n        } else {\n            return (MathError.INTEGER_OVERFLOW, 0);\n        }\n    }\n\n    /**\n    * @dev add a and b and then subtract 
    c\n    */\n    function addThenSubUInt(uint a, uint b, uint c) internal pure returns (MathError, uint) {\n        (MathError err0, uint sum) = 
    addUInt(a, b);\n\n        if (err0 != MathError.NO_ERROR) {\n            return (err0, 0);\n        }\n\n        return subUInt(sum, c);\n    
    }\n}"},"CErc20.sol":{"content":"pragma solidity ^0.5.8;\n\nimport \"./CToken.sol\";\n\n/**\n * @title Compound\u0027s CErc20 Contract\n * @notice 
    CTokens which wrap an EIP-20 underlying\n * @author Compound\n */\ncontract CErc20 is CToken {\n\n    /**\n     * @notice Underlying asset for this 
    CToken\n     */\n    address public underlying;\n\n    /**\n     * @notice Construct a new money market\n     * @param underlying_ The address of 
    the underlying asset\n     * @param comptroller_ The address of the Comptroller\n     * @param interestRateModel_ The address of the interest rate 
    model\n     * @param initialExchangeRateMantissa_ The initial exchange rate, scaled by 1e18\n     * @param name_ ERC-20 name of this token\n     * 
    @param symbol_ ERC-20 symbol of this token\n     * @param decimals_ ERC-20 decimal precision of this token\n     */\n    constructor(address 
    underlying_,\n                ComptrollerInterface comptroller_,\n                InterestRateModel interestRateModel_,\n                uint 
    initialExchangeRateMantissa_,\n                string memory name_,\n                string memory symbol_,\n                uint decimals_) 
    public\n    CToken(comptroller_, interestRateModel_, initialExchangeRateMantissa_, name_, symbol_, decimals_) {\n        // Set underlying\n       
     underlying = underlying_;\n        EIP20Interface(underlying).totalSupply(); // Sanity check the underlying\n    }\n\n    /*** User Interface 
    ***/\n\n    /**\n     * @notice Sender supplies assets into the market and receives cTokens in exchange\n     * @dev Accrues interest whether or 
    not the operation succeeds, unless reverted\n     * @param mintAmount The amount of the underlying asset to supply\n     * @return uint 0=success, 
    otherwise a failure (see ErrorReporter.sol for details)\n     */\n    function mint(uint mintAmount) external returns (uint) {\n        return 
    mintInternal(mintAmount);\n    }\n\n    /**\n     * @notice Sender redeems cTokens in exchange for the underlying asset\n     * @dev Accrues 
    interest whether or not the operation succeeds, unless reverted\n     * @param redeemTokens The number of cTokens to redeem into underlying\n     * 
    @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)\n     */\n    function redeem(uint redeemTokens) external returns 
    (uint) {\n        return redeemInternal(redeemTokens);\n    }\n\n    /**\n     * @notice Sender redeems cTokens in exchange for a specified amount 
    of underlying asset\n     * @dev Accrues interest whether or not the operation succeeds, unless reverted\n     * @param redeemAmount The amount of 
    underlying to redeem\n     * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)\n     */\n    function 
    redeemUnderlying(uint redeemAmount) external returns (uint) {\n        return redeemUnderlyingInternal(redeemAmount);\n    }\n\n    /**\n      * 
    @notice Sender borrows assets from the protocol to their own address\n      * @param borrowAmount The amount of the underlying asset to borrow\n   
       * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)\n      */\n    function borrow(uint borrowAmount) external 
    returns (uint) {\n        return borrowInternal(borrowAmount);\n    }\n\n    /**\n     * @notice Sender repays their own borrow\n     * @param 
    repayAmount The amount to repay\n     * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)\n     */\n    function 
    repayBorrow(uint repayAmount) external returns (uint) {\n        return repayBorrowInternal(repayAmount);\n    }\n\n    /**\n     * @notice Sender 
    repays a borrow belonging to borrower\n     * @param borrower the account with the debt being payed off\n     * @param repayAmount The amount to 
    repay\n     * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)\n     */\n    function repayBorrowBehalf(address 
    borrower, uint repayAmount) external returns (uint) {\n        return repayBorrowBehalfInternal(borrower, repayAmount);\n    }\n\n    /**\n     * 
    @notice The sender liquidates the borrowers collateral.\n     *  The collateral seized is transferred to the liquidator.\n     * @param borrower 
    The borrower of this cToken to be liquidated\n     * @param cTokenCollateral The market in which to seize collateral from the borrower\n     * 
    @param repayAmount The amount of the underlying borrowed asset to repay\n     * @return uint 0=success, otherwise a failure (see ErrorReporter.sol 
    for details)\n     */\n    function liquidateBorrow(address borrower, uint repayAmount, CToken cTokenCollateral) external returns (uint) {\n       
     return liquidateBorrowInternal(borrower, repayAmount, cTokenCollateral);\n    }\n\n    /*** Safe Token ***/\n\n    /**\n     * @notice Gets 
    balance of this contract in terms of the underlying\n     * @dev This excludes the value of the current message, if any\n     * @return The 
    quantity of underlying tokens owned by this contract\n     */\n    function getCashPrior() internal view returns (uint) {\n        EIP20Interface 
    token = EIP20Interface(underlying);\n        return token.balanceOf(address(this));\n    }\n\n    /**\n     * @dev Checks whether or not there is 
    sufficient allowance for this contract to move amount from `from` and\n     *      whether or not `from` has a balance of at least `amount`. Does 
    NOT do a transfer.\n     */\n    function checkTransferIn(address from, uint amount) internal view returns (Error) {\n        EIP20Interface token 
    = EIP20Interface(underlying);\n\n        if (token.allowance(from, address(this)) \u003c amount) {\n            return Error
    .TOKEN_INSUFFICIENT_ALLOWANCE;\n        }\n\n        if (token.balanceOf(from) \u003c amount) {\n            return Error
    .TOKEN_INSUFFICIENT_BALANCE;\n        }\n\n        return Error.NO_ERROR;\n    }\n\n    /**\n     * @dev Similar to EIP20 transfer, except it 
    handles a False result from `transferFrom` and returns an explanatory\n     *      error code rather than reverting.  If caller has not called 
    `checkTransferIn`, this may revert due to\n     *      insufficient balance or insufficient allowance. If caller has called `checkTransferIn` prior 
    to this call,\n     *      and it returned Error.NO_ERROR, this should not revert in normal conditions.\n     *\n     *      Note: This wrapper 
    safely handles non-standard ERC-20 tokens that do not return a value.\n     *            See here: https://medium.com/coinmonks/missing-return
    -value-bug-at-least-130-tokens-affected-d67bf08521ca\n     */\n    function doTransferIn(address from, uint amount) internal returns (Error) {\n   
         EIP20NonStandardInterface token = EIP20NonStandardInterface(underlying);\n        bool result;\n\n        token.transferFrom(from, address
    (this), amount);\n\n        // solium-disable-next-line security/no-inline-assembly\n        assembly {\n            switch returndatasize()\n     
               case 0 {                      // This is a non-standard ERC-20\n                    result := not(0)          // set result to true\n   
                 }\n                case 32 {                     // This is a complaint ERC-20\n                    returndatacopy(0, 0, 32)\n        
                result := mload(0)        // Set `result = returndata` of external call\n                }\n                default {                  
       // This is an excessively non-compliant ERC-20, revert.\n                    revert(0, 0)\n                }\n        }\n\n        if (!result) 
    {\n            return Error.TOKEN_TRANSFER_IN_FAILED;\n        }\n\n        return Error.NO_ERROR;\n    }\n\n    /**\n     * @dev Similar to EIP20 
    transfer, except it handles a False result from `transfer` and returns an explanatory\n     *      error code rather than reverting. If caller has 
    not called checked protocol\u0027s balance, this may revert due to\n     *      insufficient cash held in this contract. If caller has checked 
    protocol\u0027s balance prior to this call, and verified\n     *      it is \u003e= amount, this should not revert in normal conditions.\n     *\n 
        *      Note: This wrapper safely handles non-standard ERC-20 tokens that do not return a value.\n     *            See here: https://medium.com
    /coinmonks/missing-return-value-bug-at-least-130-tokens-affected-d67bf08521ca\n     */\n    function doTransferOut(address payable to, uint amount) 
    internal returns (Error) {\n        EIP20NonStandardInterface token = EIP20NonStandardInterface(underlying);\n        bool result;\n\n        token
    .transfer(to, amount);\n\n        // solium-disable-next-line security/no-inline-assembly\n        assembly {\n            switch returndatasize
    ()\n                case 0 {                      // This is a non-standard ERC-20\n                    result := not(0)          // set result to 
    true\n                }\n                case 32 {                     // This is a complaint ERC-20\n                    returndatacopy(0, 0, 32
    )\n                    result := mload(0)        // Set `result = returndata` of external call\n                }\n                default {       
                  // This is an excessively non-compliant ERC-20, revert.\n                    revert(0, 0)\n                }\n        }\n\n        if 
    (!result) {\n            return Error.TOKEN_TRANSFER_OUT_FAILED;\n        }\n\n        return Error.NO_ERROR;\n    }\n}\n"},"CEther.sol":{"content"
    :"pragma solidity ^0.5.8;\n\nimport \"./CToken.sol\";\n\n/**\n * @title Compound\u0027s CEther Contract\n * @notice CToken which wraps Ether\n * 
    @author Compound\n */\ncontract CEther is CToken {\n    /**\n     * @notice Construct a new CEther money market\n     * @param comptroller_ The 
    address of the Comptroller\n     * @param interestRateModel_ The address of the interest rate model\n     * @param initialExchangeRateMantissa_ The 
    initial exchange rate, scaled by 1e18\n     * @param name_ ERC-20 name of this token\n     * @param symbol_ ERC-20 symbol of this token\n     * 
    @param decimals_ ERC-20 decimal precision of this token\n     */\n    constructor(ComptrollerInterface comptroller_,\n                
    InterestRateModel interestRateModel_,\n                uint initialExchangeRateMantissa_,\n                string memory name_,\n                
    string memory symbol_,\n                uint decimals_) public\n    CToken(comptroller_, interestRateModel_, initialExchangeRateMantissa_, name_, 
    symbol_, decimals_) {}\n\n    /*** User Interface ***/\n\n    /**\n     * @notice Sender supplies assets into the market and receives cTokens in 
    exchange\n     * @dev Reverts upon any failure\n     */\n    function mint() external payable {\n        requireNoError(mintInternal(msg.value), 
    \"mint failed\");\n    }\n\n    /**\n     * @notice Sender redeems cTokens in exchange for the underlying asset\n     * @dev Accrues interest 
    whether or not the operation succeeds, unless reverted\n     * @param redeemTokens The number of cTokens to redeem into underlying\n     * @return 
    uint 0=success, otherwise a failure (see ErrorReporter.sol for details)\n     */\n    function redeem(uint redeemTokens) external returns (uint) 
    {\n        return redeemInternal(redeemTokens);\n    }\n\n    /**\n     * @notice Sender redeems cTokens in exchange for a specified amount of 
    underlying asset\n     * @dev Accrues interest whether or not the operation succeeds, unless reverted\n     * @param redeemAmount The amount of 
    underlying to redeem\n     * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)\n     */\n    function 
    redeemUnderlying(uint redeemAmount) external returns (uint) {\n        return redeemUnderlyingInternal(redeemAmount);\n    }\n\n    /**\n      * 
    @notice Sender borrows assets from the protocol to their own address\n      * @param borrowAmount The amount of the underlying asset to borrow\n   
       * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)\n      */\n    function borrow(uint borrowAmount) external 
    returns (uint) {\n        return borrowInternal(borrowAmount);\n    }\n\n    /**\n     * @notice Sender repays their own borrow\n     * @dev 
    Reverts upon any failure\n     */\n    function repayBorrow() external payable {\n        requireNoError(repayBorrowInternal(msg.value), 
    \"repayBorrow failed\");\n    }\n\n    /**\n     * @notice Sender repays a borrow belonging to borrower\n     * @dev Reverts upon any failure\n    
     * @param borrower the account with the debt being payed off\n     */\n    function repayBorrowBehalf(address borrower) external payable {\n       
     requireNoError(repayBorrowBehalfInternal(borrower, msg.value), \"repayBorrowBehalf failed\");\n    }\n\n    /**\n     * @notice The sender 
    liquidates the borrowers collateral.\n     *  The collateral seized is transferred to the liquidator.\n     * @dev Reverts upon any failure\n     * 
    @param borrower The borrower of this cToken to be liquidated\n     * @param cTokenCollateral The market in which to seize collateral from the 
    borrower\n     */\n    function liquidateBorrow(address borrower, CToken cTokenCollateral) external payable {\n        requireNoError
    (liquidateBorrowInternal(borrower, msg.value, cTokenCollateral), \"liquidateBorrow failed\");\n    }\n\n    /**\n     * @notice Send Ether to 
    CEther to mint\n     */\n    function () external payable {\n        requireNoError(mintInternal(msg.value), \"mint failed\");\n    }\n\n    /*** 
    Safe Token ***/\n\n    /**\n     * @notice Gets balance of this contract in terms of Ether, before this message\n     * @dev This excludes the 
    value of the current message, if any\n     * @return The quantity of Ether owned by this contract\n     */\n    function getCashPrior() internal 
    view returns (uint) {\n        (MathError err, uint startingBalance) = subUInt(address(this).balance, msg.value);\n        require(err == MathError
    .NO_ERROR);\n        return startingBalance;\n    }\n\n    /**\n     * @notice Checks whether the requested transfer matches the `msg`\n     * @dev 
    Does NOT do a transfer\n     * @param from Address sending the Ether\n     * @param amount Amount of Ether being sent\n     * @return Whether or 
    not the transfer checks out\n     */\n    function checkTransferIn(address from, uint amount) internal view returns (Error) {\n        // Sanity 
    checks\n        require(msg.sender == from, \"sender mismatch\");\n        require(msg.value == amount, \"value mismatch\");\n        return Error
    .NO_ERROR;\n    }\n\n    /**\n     * @notice Perform the actual transfer in, which is a no-op\n     * @param from Address sending the Ether\n     * 
    @param amount Amount of Ether being sent\n     * @return Success\n     */\n    function doTransferIn(address from, uint amount) internal returns 
    (Error) {\n        // Sanity checks\n        require(msg.sender == from, \"sender mismatch\");\n        require(msg.value == amount, \"value 
    mismatch\");\n        return Error.NO_ERROR;\n    }\n\n    function doTransferOut(address payable to, uint amount) internal returns (Error) {\n    
        /* Send the Ether, with minimal gas and revert on failure */\n        to.transfer(amount);\n        return Error.NO_ERROR;\n    }\n\n    
    function requireNoError(uint errCode, string memory message) internal pure {\n        if (errCode == uint(Error.NO_ERROR)) {\n            return;\n 
           }\n\n        bytes memory fullMessage = new bytes(bytes(message).length + 5);\n        uint i;\n\n        for (i = 0; i \u003c bytes(message
    ).length; i++) {\n            fullMessage[i] = bytes(message)[i];\n        }\n\n        fullMessage[i+0] = byte(uint8(32));\n        fullMessage[i
    +1] = byte(uint8(40));\n        fullMessage[i+2] = byte(uint8(48 + ( errCode / 10 )));\n        fullMessage[i+3] = byte(uint8(48 + ( errCode % 10 
    )));\n        fullMessage[i+4] = byte(uint8(41));\n\n        require(errCode == uint(Error.NO_ERROR), string(fullMessage));\n    }\n}\n"}
    ,"Comptroller.sol":{"content":"pragma solidity ^0.5.8;\n\nimport \"./CToken.sol\";\nimport \"./ErrorReporter.sol\";\nimport \"./Exponential.sol\"
    ;\nimport \"./PriceOracle.sol\";\nimport \"./ComptrollerInterface.sol\";\nimport \"./ComptrollerStorage.sol\";\nimport \"./Unitroller.sol\";\n\n
    /**\n * @title Compound\u0027s Comptroller Contract\n * @author Compound\n */\ncontract Comptroller is ComptrollerV1Storage, ComptrollerInterface, 
    ComptrollerErrorReporter, Exponential {\n    struct Market {\n        /**\n         * @notice Whether or not this market is listed\n         */\n  
          bool isListed;\n\n        /**\n         * @notice Multiplier representing the most one can borrow against their collateral in this market.\n 
            *  For instance, 0.9 to allow borrowing 90% of collateral value.\n         *  Must be between 0 and 1, and stored as a mantissa.\n         
    */\n        uint collateralFactorMantissa;\n\n        /**\n         * @notice Per-market mapping of \"accounts in this asset\"\n         */\n      
      mapping(address =\u003e bool) accountMembership;\n    }\n\n    /**\n     * @notice Official mapping of cTokens -\u003e Market metadata\n     * 
    @dev Used e.g. to determine if a market is supported\n     */\n    mapping(address =\u003e Market) public markets;\n\n    /**\n     * @notice 
    Emitted when an admin supports a market\n     */\n    event MarketListed(CToken cToken);\n\n    /**\n     * @notice Emitted when an account enters 
    a market\n     */\n    event MarketEntered(CToken cToken, address account);\n\n    /**\n     * @notice Emitted when an account exits a market\n    
     */\n    event MarketExited(CToken cToken, address account);\n\n    /**\n     * @notice Emitted when close factor is changed by admin\n     */\n   
     event NewCloseFactor(uint oldCloseFactorMantissa, uint newCloseFactorMantissa);\n\n    /**\n     * @notice Emitted when a collateral factor is 
    changed by admin\n     */\n    event NewCollateralFactor(CToken cToken, uint oldCollateralFactorMantissa, uint newCollateralFactorMantissa);\n\n   
     /**\n     * @notice Emitted when liquidation incentive is changed by admin\n     */\n    event NewLiquidationIncentive(uint 
    oldLiquidationIncentiveMantissa, uint newLiquidationIncentiveMantissa);\n\n    /**\n     * @notice Emitted when maxAssets is changed by admin\n    
     */\n    event NewMaxAssets(uint oldMaxAssets, uint newMaxAssets);\n\n    /**\n     * @notice Emitted when price oracle is changed\n     */\n    
    event NewPriceOracle(PriceOracle oldPriceOracle, PriceOracle newPriceOracle);\n\n    /**\n     * @notice Indicator that this is a Comptroller 
    contract (for inspection)\n     */\n    bool public constant isComptroller = true;\n\n    // closeFactorMantissa must be strictly greater than this 
    value\n    uint constant closeFactorMinMantissa = 5e16; // 0.05\n\n    // closeFactorMantissa must not exceed this value\n    uint constant 
    closeFactorMaxMantissa = 9e17; // 0.9\n\n    // No collateralFactorMantissa may exceed this value\n    uint constant collateralFactorMaxMantissa = 
    9e17; // 0.9\n\n    // liquidationIncentiveMantissa must be no less than this value\n    uint constant liquidationIncentiveMinMantissa = 
    mantissaOne;\n\n    // liquidationIncentiveMantissa must be no greater than this value\n    uint constant liquidationIncentiveMaxMantissa = 15e17; 
    // 1.5\n\n    constructor() public {\n        admin = msg.sender;\n    }\n\n    /*** Assets You Are In ***/\n\n    /**\n     * @notice Returns the 
    assets an account has entered\n     * @param account The address of the account to pull assets for\n     * @return A dynamic list with the assets 
    the account has entered\n     */\n    function getAssetsIn(address account) external view returns (CToken[] memory) {\n        CToken[] memory 
    assetsIn = accountAssets[account];\n\n        return assetsIn;\n    }\n\n    /**\n     * @notice Returns whether the given account is entered in 
    the given asset\n     * @param account The address of the account to check\n     * @param cToken The cToken to check\n     * @return True if the 
    account is in the asset, otherwise false.\n     */\n    function checkMembership(address account, CToken cToken) external view returns (bool) {\n  
          return markets[address(cToken)].accountMembership[account];\n    }\n\n    /**\n     * @notice Add assets to be included in account liquidity 
    calculation\n     * @param cTokens The list of addresses of the cToken markets to be enabled\n     * @return Success indicator for whether each 
    corresponding market was entered\n     */\n    function enterMarkets(address[] memory cTokens) public returns (uint[] memory) {\n        uint len = 
    cTokens.length;\n\n        uint[] memory results = new uint[](len);\n        for (uint i = 0; i \u003c len; i++) {\n            CToken cToken = 
    CToken(cTokens[i]);\n            Market storage marketToJoin = markets[address(cToken)];\n\n            if (!marketToJoin.isListed) {\n            
        // if market is not listed, cannot join move along\n                results[i] = uint(Error.MARKET_NOT_LISTED);\n                continue;\n   
             }\n\n            if (marketToJoin.accountMembership[msg.sender] == true) {\n                // if already joined, move along\n            
        results[i] = uint(Error.NO_ERROR);\n                continue;\n            }\n\n            if (accountAssets[msg.sender].length \u003e= 
    maxAssets)  {\n                // if no space, cannot join, move along\n                results[i] = uint(Error.TOO_MANY_ASSETS);\n                
    continue;\n            }\n\n            // survived the gauntlet, add to list\n            // NOTE: we store these somewhat redundantly as a 
    significant optimization\n            //  this avoids having to iterate through the list for the most common use cases\n            //  that is, 
    only when we need to perform liquidity checks\n            //   and not whenever we want to check if an account is in a particular market\n        
        marketToJoin.accountMembership[msg.sender] = true;\n            accountAssets[msg.sender].push(cToken);\n\n            emit MarketEntered
    (cToken, msg.sender);\n\n            results[i] = uint(Error.NO_ERROR);\n        }\n\n        return results;\n    }\n\n    /**\n     * @notice 
    Removes asset from sender\u0027s account liquidity calculation\n     * @dev Sender must not have an outstanding borrow balance in the asset,\n     
    *  or be providing neccessary collateral for an outstanding borrow.\n     * @param cTokenAddress The address of the asset to be removed\n     * 
    @return Whether or not the account successfully exited the market\n     */\n    function exitMarket(address cTokenAddress) external returns (uint) 
    {\n        CToken cToken = CToken(cTokenAddress);\n        /* Get sender tokensHeld and amountOwed underlying from the cToken */\n        (uint 
    oErr, uint tokensHeld, uint amountOwed, ) = cToken.getAccountSnapshot(msg.sender);\n        require(oErr == 0, \"exitMarket: getAccountSnapshot 
    failed\"); // semi-opaque error code\n\n        /* Fail if the sender has a borrow balance */\n        if (amountOwed != 0) {\n            return 
    fail(Error.NONZERO_BORROW_BALANCE, FailureInfo.EXIT_MARKET_BALANCE_OWED);\n        }\n\n        /* Fail if the sender is not permitted to redeem 
    all of their tokens */\n        uint allowed = redeemAllowedInternal(cTokenAddress, msg.sender, tokensHeld);\n        if (allowed != 0) {\n        
        return failOpaque(Error.REJECTION, FailureInfo.EXIT_MARKET_REJECTION, allowed);\n        }\n\n        Market storage marketToExit = 
    markets[address(cToken)];\n\n        /* Return true if the sender is not already ‘in’ the market */\n        if (!marketToExit
    .accountMembership[msg.sender]) {\n            return uint(Error.NO_ERROR);\n        }\n\n        /* Set cToken account membership to false */\n   
         delete marketToExit.accountMembership[msg.sender];\n\n        /* Delete cToken from the account’s list of assets */\n        // load into 
    memory for faster iteration\n        CToken[] memory userAssetList = accountAssets[msg.sender];\n        uint len = userAssetList.length;\n        
    uint assetIndex = len;\n        for (uint i = 0; i \u003c len; i++) {\n            if (userAssetList[i] == cToken) {\n                assetIndex = 
    i;\n                break;\n            }\n        }\n\n        // We *must* have found the asset in the list or our redundant data structure is 
    broken\n        assert(assetIndex \u003c len);\n\n        // copy last item in list to location of item to be removed, reduce length by 1\n        
    CToken[] storage storedList = accountAssets[msg.sender];\n        storedList[assetIndex] = storedList[storedList.length - 1];\n        storedList
    .length--;\n\n        emit MarketExited(cToken, msg.sender);\n\n        return uint(Error.NO_ERROR);\n    }\n\n    /*** Policy Hooks ***/\n\n    
    /**\n     * @notice Checks if the account should be allowed to mint tokens in the given market\n     * @param cToken The market to verify the mint 
    against\n     * @param minter The account which would get the minted tokens\n     * @param mintAmount The amount of underlying being supplied to 
    the market in exchange for tokens\n     * @return 0 if the mint is allowed, otherwise a semi-opaque error code (See ErrorReporter.sol)\n     */\n  
      function mintAllowed(address cToken, address minter, uint mintAmount) external returns (uint) {\n        minter;       // currently unused\n     
       mintAmount;   // currently unused\n\n        if (!markets[cToken].isListed) {\n            return uint(Error.MARKET_NOT_LISTED);\n        }\n\n 
           // *may include Policy Hook-type checks\n\n        return uint(Error.NO_ERROR);\n    }\n\n    /**\n     * @notice Validates mint and reverts 
    on rejection. May emit logs.\n     * @param cToken Asset being minted\n     * @param minter The address minting the tokens\n     * @param 
    mintAmount The amount of the underlying asset being minted\n     * @param mintTokens The number of tokens being minted\n     */\n    function 
    mintVerify(address cToken, address minter, uint mintAmount, uint mintTokens) external {\n        cToken;       // currently unused\n        minter; 
          // currently unused\n        mintAmount;   // currently unused\n        mintTokens;   // currently unused\n\n        if (false) {\n          
      maxAssets = maxAssets; // not pure\n        }\n    }\n\n    /**\n     * @notice Checks if the account should be allowed to redeem tokens in the 
    given market\n     * @param cToken The market to verify the redeem against\n     * @param redeemer The account which would redeem the tokens\n     
    * @param redeemTokens The number of cTokens to exchange for the underlying asset in the market\n     * @return 0 if the redeem is allowed, 
    otherwise a semi-opaque error code (See ErrorReporter.sol)\n     */\n    function redeemAllowed(address cToken, address redeemer, uint redeemTokens
    ) external returns (uint) {\n        return redeemAllowedInternal(cToken, redeemer, redeemTokens);\n    }\n\n    function redeemAllowedInternal
    (address cToken, address redeemer, uint redeemTokens) internal view returns (uint) {\n        if (!markets[cToken].isListed) {\n            return 
    uint(Error.MARKET_NOT_LISTED);\n        }\n\n        // *may include Policy Hook-type checks\n\n        /* If the redeemer is not \u0027in\u0027 
    the market, then we can bypass the liquidity check */\n        if (!markets[cToken].accountMembership[redeemer]) {\n            return uint(Error
    .NO_ERROR);\n        }\n\n        /* Otherwise, perform a hypothetical liquidity check to guard against shortfall */\n        (Error err, , uint 
    shortfall) = getHypotheticalAccountLiquidityInternal(redeemer, CToken(cToken), redeemTokens, 0);\n        if (err != Error.NO_ERROR) {\n           
     return uint(err);\n        }\n        if (shortfall \u003e 0) {\n            return uint(Error.INSUFFICIENT_LIQUIDITY);\n        }\n\n        
    return uint(Error.NO_ERROR);\n    }\n\n    /**\n     * @notice Validates redeem and reverts on rejection. May emit logs.\n     * @param cToken 
    Asset being redeemed\n     * @param redeemer The address redeeming the tokens\n     * @param redeemAmount The amount of the underlying asset being 
    redeemed\n     * @param redeemTokens The number of tokens being redeemed\n     */\n    function redeemVerify(address cToken, address redeemer, uint 
    redeemAmount, uint redeemTokens) external {\n        cToken;         // currently unused\n        redeemer;       // currently unused\n        
    redeemAmount;   // currently unused\n        redeemTokens;   // currently unused\n\n        // Require tokens is zero or amount is also zero\n     
       if (redeemTokens == 0 \u0026\u0026 redeemAmount \u003e 0) {\n            revert(\"redeemTokens zero\");\n        }\n    }\n\n    /**\n     * 
    @notice Checks if the account should be allowed to borrow the underlying asset of the given market\n     * @param cToken The market to verify the 
    borrow against\n     * @param borrower The account which would borrow the asset\n     * @param borrowAmount The amount of underlying the account 
    would borrow\n     * @return 0 if the borrow is allowed, otherwise a semi-opaque error code (See ErrorReporter.sol)\n     */\n    function 
    borrowAllowed(address cToken, address borrower, uint borrowAmount) external returns (uint) {\n        if (!markets[cToken].isListed) {\n           
     return uint(Error.MARKET_NOT_LISTED);\n        }\n\n        // *may include Policy Hook-type checks\n\n        if (!markets[cToken]
    .accountMembership[borrower]) {\n            return uint(Error.MARKET_NOT_ENTERED);\n        }\n\n        if (oracle.getUnderlyingPrice(CToken
    (cToken)) == 0) {\n            return uint(Error.PRICE_ERROR);\n        }\n\n        (Error err, , uint shortfall) = 
    getHypotheticalAccountLiquidityInternal(borrower, CToken(cToken), 0, borrowAmount);\n        if (err != Error.NO_ERROR) {\n            return uint
    (err);\n        }\n        if (shortfall \u003e 0) {\n            return uint(Error.INSUFFICIENT_LIQUIDITY);\n        }\n\n        return uint
    (Error.NO_ERROR);\n    }\n\n    /**\n     * @notice Validates borrow and reverts on rejection. May emit logs.\n     * @param cToken Asset whose 
    underlying is being borrowed\n     * @param borrower The address borrowing the underlying\n     * @param borrowAmount The amount of the underlying 
    asset requested to borrow\n     */\n    function borrowVerify(address cToken, address borrower, uint borrowAmount) external {\n        cToken;     
        // currently unused\n        borrower;       // currently unused\n        borrowAmount;   // currently unused\n\n        if (false) {\n        
        maxAssets = maxAssets; // not pure\n        }\n    }\n\n    /**\n     * @notice Checks if the account should be allowed to repay a borrow in 
    the given market\n     * @param cToken The market to verify the repay against\n     * @param payer The account which would repay the asset\n     * 
    @param borrower The account which would borrowed the asset\n     * @param repayAmount The amount of the underlying asset the account would repay\n 
        * @return 0 if the repay is allowed, otherwise a semi-opaque error code (See ErrorReporter.sol)\n     */\n    function repayBorrowAllowed(\n   
         address cToken,\n        address payer,\n        address borrower,\n        uint repayAmount) external returns (uint) {\n        payer;       
      // currently unused\n        borrower;      // currently unused\n        repayAmount;   // currently unused\n\n        if (!markets[cToken]
    .isListed) {\n            return uint(Error.MARKET_NOT_LISTED);\n        }\n\n        // *may include Policy Hook-type checks\n\n        return 
    uint(Error.NO_ERROR);\n    }\n\n    /**\n     * @notice Validates repayBorrow and reverts on rejection. May emit logs.\n     * @param cToken Asset 
    being repaid\n     * @param payer The address repaying the borrow\n     * @param borrower The address of the borrower\n     * @param repayAmount 
    The amount of underlying being repaid\n     */\n    function repayBorrowVerify(\n        address cToken,\n        address payer,\n        address 
    borrower,\n        uint repayAmount,\n        uint borrowerIndex) external {\n        cToken;        // currently unused\n        payer;         // 
    currently unused\n        borrower;      // currently unused\n        repayAmount;   // currently unused\n        borrowerIndex; // currently 
    unused\n\n        if (false) {\n            maxAssets = maxAssets; // not pure\n        }\n    }\n\n    /**\n     * @notice Checks if the 
    liquidation should be allowed to occur\n     * @param cTokenBorrowed Asset which was borrowed by the borrower\n     * @param cTokenCollateral Asset 
    which was used as collateral and will be seized\n     * @param liquidator The address repaying the borrow and seizing the collateral\n     * @param 
    borrower The address of the borrower\n     * @param repayAmount The amount of underlying being repaid\n     */\n    function liquidateBorrowAllowed
    (\n        address cTokenBorrowed,\n        address cTokenCollateral,\n        address liquidator,\n        address borrower,\n        uint 
    repayAmount) external returns (uint) {\n        liquidator;   // currently unused\n        borrower;     // currently unused\n        repayAmount; 
     // currently unused\n\n        if (!markets[cTokenBorrowed].isListed || !markets[cTokenCollateral].isListed) {\n            return uint(Error
    .MARKET_NOT_LISTED);\n        }\n\n        // *may include Policy Hook-type checks\n\n        /* The borrower must have shortfall in order to be 
    liquidatable */\n        (Error err, , uint shortfall) = getAccountLiquidityInternal(borrower);\n        if (err != Error.NO_ERROR) {\n            
    return uint(err);\n        }\n        if (shortfall == 0) {\n            return uint(Error.INSUFFICIENT_SHORTFALL);\n        }\n\n        /* The 
    liquidator may not repay more than what is allowed by the closeFactor */\n        uint borrowBalance = CToken(cTokenBorrowed).borrowBalanceStored
    (borrower);\n        (MathError mathErr, uint maxClose) = mulScalarTruncate(Exp({mantissa: closeFactorMantissa}), borrowBalance);\n        if 
    (mathErr != MathError.NO_ERROR) {\n            return uint(Error.MATH_ERROR);\n        }\n        if (repayAmount \u003e maxClose) {\n            
    return uint(Error.TOO_MUCH_REPAY);\n        }\n\n        return uint(Error.NO_ERROR);\n    }\n\n    /**\n     * @notice Validates liquidateBorrow 
    and reverts on rejection. May emit logs.\n     * @param cTokenBorrowed Asset which was borrowed by the borrower\n     * @param cTokenCollateral 
    Asset which was used as collateral and will be seized\n     * @param liquidator The address repaying the borrow and seizing the collateral\n     * 
    @param borrower The address of the borrower\n     * @param repayAmount The amount of underlying being repaid\n     */\n    function 
    liquidateBorrowVerify(\n        address cTokenBorrowed,\n        address cTokenCollateral,\n        address liquidator,\n        address borrower
    ,\n        uint repayAmount,\n        uint seizeTokens) external {\n        cTokenBorrowed;   // currently unused\n        cTokenCollateral; // 
    currently unused\n        liquidator;       // currently unused\n        borrower;         // currently unused\n        repayAmount;      // 
    currently unused\n        seizeTokens;      // currently unused\n\n        if (false) {\n            maxAssets = maxAssets; // not pure\n        
    }\n    }\n\n    /**\n     * @notice Checks if the seizing of assets should be allowed to occur\n     * @param cTokenCollateral Asset which was used 
    as collateral and will be seized\n     * @param cTokenBorrowed Asset which was borrowed by the borrower\n     * @param liquidator The address 
    repaying the borrow and seizing the collateral\n     * @param borrower The address of the borrower\n     * @param seizeTokens The number of 
    collateral tokens to seize\n     */\n    function seizeAllowed(\n        address cTokenCollateral,\n        address cTokenBorrowed,\n        
    address liquidator,\n        address borrower,\n        uint seizeTokens) external returns (uint) {\n        liquidator;       // currently 
    unused\n        borrower;         // currently unused\n        seizeTokens;      // currently unused\n\n        if (!markets[cTokenCollateral]
    .isListed || !markets[cTokenBorrowed].isListed) {\n            return uint(Error.MARKET_NOT_LISTED);\n        }\n\n        if (CToken
    (cTokenCollateral).comptroller() != CToken(cTokenBorrowed).comptroller()) {\n            return uint(Error.COMPTROLLER_MISMATCH);\n        }\n\n   
         // *may include Policy Hook-type checks\n\n        return uint(Error.NO_ERROR);\n    }\n\n    /**\n     * @notice Validates seize and reverts 
    on rejection. May emit logs.\n     * @param cTokenCollateral Asset which was used as collateral and will be seized\n     * @param cTokenBorrowed 
    Asset which was borrowed by the borrower\n     * @param liquidator The address repaying the borrow and seizing the collateral\n     * @param 
    borrower The address of the borrower\n     * @param seizeTokens The number of collateral tokens to seize\n     */\n    function seizeVerify(\n     
       address cTokenCollateral,\n        address cTokenBorrowed,\n        address liquidator,\n        address borrower,\n        uint seizeTokens) 
    external {\n        cTokenCollateral; // currently unused\n        cTokenBorrowed;   // currently unused\n        liquidator;       // currently 
    unused\n        borrower;         // currently unused\n        seizeTokens;      // currently unused\n\n        if (false) {\n            maxAssets 
    = maxAssets; // not pure\n        }\n    }\n\n    /**\n     * @notice Checks if the account should be allowed to transfer tokens in the given 
    market\n     * @param cToken The market to verify the transfer against\n     * @param src The account which sources the tokens\n     * @param dst 
    The account which receives the tokens\n     * @param transferTokens The number of cTokens to transfer\n     * @return 0 if the transfer is allowed, 
    otherwise a semi-opaque error code (See ErrorReporter.sol)\n     */\n    function transferAllowed(address cToken, address src, address dst, uint 
    transferTokens) external returns (uint) {\n        cToken;         // currently unused\n        src;            // currently unused\n        dst;  
              // currently unused\n        transferTokens; // currently unused\n\n        // *may include Policy Hook-type checks\n\n        // 
    Currently the only consideration is whether or not\n        //  the src is allowed to redeem this many tokens\n        return redeemAllowedInternal
    (cToken, src, transferTokens);\n    }\n\n    /**\n     * @notice Validates transfer and reverts on rejection. May emit logs.\n     * @param cToken 
    Asset being transferred\n     * @param src The account which sources the tokens\n     * @param dst The account which receives the tokens\n     * 
    @param transferTokens The number of cTokens to transfer\n     */\n    function transferVerify(address cToken, address src, address dst, uint 
    transferTokens) external {\n        cToken;         // currently unused\n        src;            // currently unused\n        dst;            // 
    currently unused\n        transferTokens; // currently unused\n\n        if (false) {\n            maxAssets = maxAssets; // not pure\n        }\n 
       }\n\n    /*** Liquidity/Liquidation Calculations ***/\n\n    /**\n     * @dev Local vars for avoiding stack-depth limits in calculating account 
    liquidity.\n     *  Note that `cTokenBalance` is the number of cTokens the account owns in the market,\n     *  whereas `borrowBalance` is the 
    amount of underlying that the account has borrowed.\n     */\n    struct AccountLiquidityLocalVars {\n        uint sumCollateral;\n        uint 
    sumBorrowPlusEffects;\n        uint cTokenBalance;\n        uint borrowBalance;\n        uint exchangeRateMantissa;\n        uint 
    oraclePriceMantissa;\n        Exp collateralFactor;\n        Exp exchangeRate;\n        Exp oraclePrice;\n        Exp tokensToEther;\n    }\n\n    
    /**\n     * @notice Determine the current account liquidity wrt collateral requirements\n     * @return (possible error code (semi-opaque),\n      
              account liquidity in excess of collateral requirements,\n     *          account shortfall below collateral requirements)\n     */\n    
    function getAccountLiquidity(address account) public view returns (uint, uint, uint) {\n        (Error err, uint liquidity, uint shortfall) = 
    getHypotheticalAccountLiquidityInternal(account, CToken(0), 0, 0);\n\n        return (uint(err), liquidity, shortfall);\n    }\n\n    /**\n     * 
    @notice Determine the current account liquidity wrt collateral requirements\n     * @return (possible error code,\n                account 
    liquidity in excess of collateral requirements,\n     *          account shortfall below collateral requirements)\n     */\n    function 
    getAccountLiquidityInternal(address account) internal view returns (Error, uint, uint) {\n        return getHypotheticalAccountLiquidityInternal
    (account, CToken(0), 0, 0);\n    }\n\n    /**\n     * @notice Determine what the account liquidity would be if the given amounts were redeemed
    /borrowed\n     * @param cTokenModify The market to hypothetically redeem/borrow in\n     * @param account The account to determine liquidity for\n 
        * @param redeemTokens The number of tokens to hypothetically redeem\n     * @param borrowAmount The amount of underlying to hypothetically 
    borrow\n     * @dev Note that we calculate the exchangeRateStored for each collateral cToken using stored data,\n     *  without calculating 
    accumulated interest.\n     * @return (possible error code,\n                hypothetical account liquidity in excess of collateral requirements,\n 
        *          hypothetical account shortfall below collateral requirements)\n     */\n    function getHypotheticalAccountLiquidityInternal(\n     
       address account,\n        CToken cTokenModify,\n        uint redeemTokens,\n        uint borrowAmount) internal view returns (Error, uint, uint) 
    {\n\n        AccountLiquidityLocalVars memory vars; // Holds all our calculation results\n        uint oErr;\n        MathError mErr;\n\n        // 
    For each asset the account is in\n        CToken[] memory assets = accountAssets[account];\n        for (uint i = 0; i \u003c assets.length; i++) 
    {\n            CToken asset = assets[i];\n\n            // Read the balances and exchange rate from the cToken\n            (oErr, vars
    .cTokenBalance, vars.borrowBalance, vars.exchangeRateMantissa) = asset.getAccountSnapshot(account);\n            if (oErr != 0) { // semi-opaque 
    error code, we assume NO_ERROR == 0 is invariant between upgrades\n                return (Error.SNAPSHOT_ERROR, 0, 0);\n            }\n           
     vars.collateralFactor = Exp({mantissa: markets[address(asset)].collateralFactorMantissa});\n            vars.exchangeRate = Exp({mantissa: vars
    .exchangeRateMantissa});\n\n            // Get the normalized price of the asset\n            vars.oraclePriceMantissa = oracle.getUnderlyingPrice
    (asset);\n            if (vars.oraclePriceMantissa == 0) {\n                return (Error.PRICE_ERROR, 0, 0);\n            }\n            vars
    .oraclePrice = Exp({mantissa: vars.oraclePriceMantissa});\n\n            // Pre-compute a conversion factor from tokens -\u003e ether (normalized 
    price value)\n            (mErr, vars.tokensToEther) = mulExp3(vars.collateralFactor, vars.exchangeRate, vars.oraclePrice);\n            if (mErr !
    = MathError.NO_ERROR) {\n                return (Error.MATH_ERROR, 0, 0);\n            }\n\n            // sumCollateral += tokensToEther * 
    cTokenBalance\n            (mErr, vars.sumCollateral) = mulScalarTruncateAddUInt(vars.tokensToEther, vars.cTokenBalance, vars.sumCollateral);\n    
            if (mErr != MathError.NO_ERROR) {\n                return (Error.MATH_ERROR, 0, 0);\n            }\n\n            // sumBorrowPlusEffects 
    += oraclePrice * borrowBalance\n            (mErr, vars.sumBorrowPlusEffects) = mulScalarTruncateAddUInt(vars.oraclePrice, vars.borrowBalance, vars
    .sumBorrowPlusEffects);\n            if (mErr != MathError.NO_ERROR) {\n                return (Error.MATH_ERROR, 0, 0);\n            }\n\n        
        // Calculate effects of interacting with cTokenModify\n            if (asset == cTokenModify) {\n                // redeem effect\n            
        // sumBorrowPlusEffects += tokensToEther * redeemTokens\n                (mErr, vars.sumBorrowPlusEffects) = mulScalarTruncateAddUInt(vars
    .tokensToEther, redeemTokens, vars.sumBorrowPlusEffects);\n                if (mErr != MathError.NO_ERROR) {\n                    return (Error
    .MATH_ERROR, 0, 0);\n                }\n\n                // borrow effect\n                // sumBorrowPlusEffects += oraclePrice * borrowAmount\n 
                   (mErr, vars.sumBorrowPlusEffects) = mulScalarTruncateAddUInt(vars.oraclePrice, borrowAmount, vars.sumBorrowPlusEffects);\n          
          if (mErr != MathError.NO_ERROR) {\n                    return (Error.MATH_ERROR, 0, 0);\n                }\n            }\n        }\n\n     
       // These are safe, as the underflow condition is checked first\n        if (vars.sumCollateral \u003e vars.sumBorrowPlusEffects) {\n            
    return (Error.NO_ERROR, vars.sumCollateral - vars.sumBorrowPlusEffects, 0);\n        } else {\n            return (Error.NO_ERROR, 0, vars
    .sumBorrowPlusEffects - vars.sumCollateral);\n        }\n    }\n\n    /**\n     * @notice Calculate number of tokens of collateral asset to seize 
    given an underlying amount\n     * @dev Used in liquidation (called in cToken.liquidateBorrowFresh)\n     * @param cTokenBorrowed The address of 
    the borrowed cToken\n     * @param cTokenCollateral The address of the collateral cToken\n     * @param repayAmount The amount of cTokenBorrowed 
    underlying to convert into cTokenCollateral tokens\n     * @return (errorCode, number of cTokenCollateral tokens to be seized in a liquidation)\n  
       */\n    function liquidateCalculateSeizeTokens(address cTokenBorrowed, address cTokenCollateral, uint repayAmount) external view returns (uint, 
    uint) {\n        /* Read oracle prices for borrowed and collateral markets */\n        uint priceBorrowedMantissa = oracle.getUnderlyingPrice
    (CToken(cTokenBorrowed));\n        uint priceCollateralMantissa = oracle.getUnderlyingPrice(CToken(cTokenCollateral));\n        if 
    (priceBorrowedMantissa == 0 || priceCollateralMantissa == 0) {\n            return (uint(Error.PRICE_ERROR), 0);\n        }\n\n        /*\n        
     * Get the exchange rate and calculate the number of collateral tokens to seize:\n         *  seizeAmount = repayAmount * liquidationIncentive * 
    priceBorrowed / priceCollateral\n         *  seizeTokens = seizeAmount / exchangeRate\n         *   = repayAmount * (liquidationIncentive * 
    priceBorrowed) / (priceCollateral * exchangeRate)\n         */\n        uint exchangeRateMantissa = CToken(cTokenCollateral).exchangeRateStored(); 
    // Note: reverts on error\n        uint seizeTokens;\n        Exp memory numerator;\n        Exp memory denominator;\n        Exp memory ratio;\n  
          MathError mathErr;\n\n        (mathErr, numerator) = mulExp(liquidationIncentiveMantissa, priceBorrowedMantissa);\n        if (mathErr != 
    MathError.NO_ERROR) {\n            return (uint(Error.MATH_ERROR), 0);\n        }\n\n        (mathErr, denominator) = mulExp
    (priceCollateralMantissa, exchangeRateMantissa);\n        if (mathErr != MathError.NO_ERROR) {\n            return (uint(Error.MATH_ERROR), 0);\n  
          }\n\n        (mathErr, ratio) = divExp(numerator, denominator);\n        if (mathErr != MathError.NO_ERROR) {\n            return (uint(Error
    .MATH_ERROR), 0);\n        }\n\n        (mathErr, seizeTokens) = mulScalarTruncate(ratio, repayAmount);\n        if (mathErr != MathError.NO_ERROR) 
    {\n            return (uint(Error.MATH_ERROR), 0);\n        }\n\n        return (uint(Error.NO_ERROR), seizeTokens);\n    }\n\n    /*** Admin 
    Functions ***/\n\n    /**\n      * @notice Sets a new price oracle for the comptroller\n      * @dev Admin function to set a new price oracle\n    
      * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)\n      */\n    function _setPriceOracle(PriceOracle newOracle) 
    public returns (uint) {\n        // Check caller is admin OR currently initialzing as new unitroller implementation\n        if 
    (!adminOrInitializing()) {\n            return fail(Error.UNAUTHORIZED, FailureInfo.SET_PRICE_ORACLE_OWNER_CHECK);\n        }\n\n        // Track 
    the old oracle for the comptroller\n        PriceOracle oldOracle = oracle;\n\n        // Ensure invoke newOracle.isPriceOracle() returns true\n   
         // require(newOracle.isPriceOracle(), \"oracle method isPriceOracle returned false\");\n\n        // Set comptroller\u0027s oracle to 
    newOracle\n        oracle = newOracle;\n\n        // Emit NewPriceOracle(oldOracle, newOracle)\n        emit NewPriceOracle(oldOracle, newOracle
    );\n\n        return uint(Error.NO_ERROR);\n    }\n\n    /**\n      * @notice Sets the closeFactor used when liquidating borrows\n      * @dev 
    Admin function to set closeFactor\n      * @param newCloseFactorMantissa New close factor, scaled by 1e18\n      * @return uint 0=success, 
    otherwise a failure. (See ErrorReporter for details)\n      */\n    function _setCloseFactor(uint newCloseFactorMantissa) external returns (uint256
    ) {\n        // Check caller is admin OR currently initialzing as new unitroller implementation\n        if (!adminOrInitializing()) {\n           
     return fail(Error.UNAUTHORIZED, FailureInfo.SET_CLOSE_FACTOR_OWNER_CHECK);\n        }\n\n        Exp memory newCloseFactorExp = Exp({mantissa: 
    newCloseFactorMantissa});\n        Exp memory lowLimit = Exp({mantissa: closeFactorMinMantissa});\n        if (lessThanOrEqualExp(newCloseFactorExp
    , lowLimit)) {\n            return fail(Error.INVALID_CLOSE_FACTOR, FailureInfo.SET_CLOSE_FACTOR_VALIDATION);\n        }\n\n        Exp memory 
    highLimit = Exp({mantissa: closeFactorMaxMantissa});\n        if (lessThanExp(highLimit, newCloseFactorExp)) {\n            return fail(Error
    .INVALID_CLOSE_FACTOR, FailureInfo.SET_CLOSE_FACTOR_VALIDATION);\n        }\n\n        uint oldCloseFactorMantissa = closeFactorMantissa;\n        
    closeFactorMantissa = newCloseFactorMantissa;\n        emit NewCloseFactor(oldCloseFactorMantissa, closeFactorMantissa);\n\n        return uint
    (Error.NO_ERROR);\n    }\n\n    /**\n      * @notice Sets the collateralFactor for a market\n      * @dev Admin function to set per-market 
    collateralFactor\n      * @param cToken The market to set the factor on\n      * @param newCollateralFactorMantissa The new collateral factor, 
    scaled by 1e18\n      * @return uint 0=success, otherwise a failure. (See ErrorReporter for details)\n      */\n    function _setCollateralFactor
    (CToken cToken, uint newCollateralFactorMantissa) external returns (uint256) {\n        // Check caller is admin\n        if (msg.sender != admin) 
    {\n            return fail(Error.UNAUTHORIZED, FailureInfo.SET_COLLATERAL_FACTOR_OWNER_CHECK);\n        }\n\n        // Verify market is listed\n  
          Market storage market = markets[address(cToken)];\n        if (!market.isListed) {\n            return fail(Error.MARKET_NOT_LISTED, 
    FailureInfo.SET_COLLATERAL_FACTOR_NO_EXISTS);\n        }\n\n        Exp memory newCollateralFactorExp = Exp({mantissa: newCollateralFactorMantissa}
    );\n\n        // Check collateral factor \u003c= 0.9\n        Exp memory highLimit = Exp({mantissa: collateralFactorMaxMantissa});\n        if 
    (lessThanExp(highLimit, newCollateralFactorExp)) {\n            return fail(Error.INVALID_COLLATERAL_FACTOR, FailureInfo
    .SET_COLLATERAL_FACTOR_VALIDATION);\n        }\n\n        // If collateral factor != 0, fail if price == 0\n        if (newCollateralFactorMantissa 
    != 0 \u0026\u0026 oracle.getUnderlyingPrice(cToken) == 0) {\n            return fail(Error.PRICE_ERROR, FailureInfo
    .SET_COLLATERAL_FACTOR_WITHOUT_PRICE);\n        }\n\n        // Set market\u0027s collateral factor to new collateral factor, remember old value\n 
           uint oldCollateralFactorMantissa = market.collateralFactorMantissa;\n        market.collateralFactorMantissa = newCollateralFactorMantissa
    ;\n\n        // Emit event with asset, old collateral factor, and new collateral factor\n        emit NewCollateralFactor(cToken, 
    oldCollateralFactorMantissa, newCollateralFactorMantissa);\n\n        return uint(Error.NO_ERROR);\n    }\n\n    /**\n      * @notice Sets 
    maxAssets which controls how many markets can be entered\n      * @dev Admin function to set maxAssets\n      * @param newMaxAssets New max 
    assets\n      * @return uint 0=success, otherwise a failure. (See ErrorReporter for details)\n      */\n    function _setMaxAssets(uint 
    newMaxAssets) external returns (uint) {\n        // Check caller is admin OR currently initialzing as new unitroller implementation\n        if 
    (!adminOrInitializing()) {\n            return fail(Error.UNAUTHORIZED, FailureInfo.SET_MAX_ASSETS_OWNER_CHECK);\n        }\n\n        uint 
    oldMaxAssets = maxAssets;\n        maxAssets = newMaxAssets;\n        emit NewMaxAssets(oldMaxAssets, newMaxAssets);\n\n        return uint(Error
    .NO_ERROR);\n    }\n\n    /**\n      * @notice Sets liquidationIncentive\n      * @dev Admin function to set liquidationIncentive\n      * @param 
    newLiquidationIncentiveMantissa New liquidationIncentive scaled by 1e18\n      * @return uint 0=success, otherwise a failure. (See ErrorReporter 
    for details)\n      */\n    function _setLiquidationIncentive(uint newLiquidationIncentiveMantissa) external returns (uint) {\n        // Check 
    caller is admin OR currently initialzing as new unitroller implementation\n        if (!adminOrInitializing()) {\n            return fail(Error
    .UNAUTHORIZED, FailureInfo.SET_LIQUIDATION_INCENTIVE_OWNER_CHECK);\n        }\n\n        // Check de-scaled 1 \u003c= newLiquidationDiscount \u003c
    = 1.5\n        Exp memory newLiquidationIncentive = Exp({mantissa: newLiquidationIncentiveMantissa});\n        Exp memory minLiquidationIncentive = 
    Exp({mantissa: liquidationIncentiveMinMantissa});\n        if (lessThanExp(newLiquidationIncentive, minLiquidationIncentive)) {\n            return 
    fail(Error.INVALID_LIQUIDATION_INCENTIVE, FailureInfo.SET_LIQUIDATION_INCENTIVE_VALIDATION);\n        }\n\n        Exp memory 
    maxLiquidationIncentive = Exp({mantissa: liquidationIncentiveMaxMantissa});\n        if (lessThanExp(maxLiquidationIncentive, 
    newLiquidationIncentive)) {\n            return fail(Error.INVALID_LIQUIDATION_INCENTIVE, FailureInfo.SET_LIQUIDATION_INCENTIVE_VALIDATION);\n     
       }\n\n        // Save current value for use in log\n        uint oldLiquidationIncentiveMantissa = liquidationIncentiveMantissa;\n\n        // 
    Set liquidation incentive to new incentive\n        liquidationIncentiveMantissa = newLiquidationIncentiveMantissa;\n\n        // Emit event with 
    old incentive, new incentive\n        emit NewLiquidationIncentive(oldLiquidationIncentiveMantissa, newLiquidationIncentiveMantissa);\n\n        
    return uint(Error.NO_ERROR);\n    }\n\n    /**\n      * @notice Add the market to the markets mapping and set it as listed\n      * @dev Admin 
    function to set isListed and add support for the market\n      * @param cToken The address of the market (token) to list\n      * @return uint 0
    =success, otherwise a failure. (See enum Error for details)\n      */\n    function _supportMarket(CToken cToken) external returns (uint) {\n      
      if (msg.sender != admin) {\n            return fail(Error.UNAUTHORIZED, FailureInfo.SUPPORT_MARKET_OWNER_CHECK);\n        }\n\n        if 
    (markets[address(cToken)].isListed) {\n            return fail(Error.MARKET_ALREADY_LISTED, FailureInfo.SUPPORT_MARKET_EXISTS);\n        }\n\n     
       cToken.isCToken(); // Sanity check to make sure its really a CToken\n\n        markets[address(cToken)] = Market({isListed: true, 
    collateralFactorMantissa: 0});\n        emit MarketListed(cToken);\n\n        return uint(Error.NO_ERROR);\n    }\n\n    function _become
    (Unitroller unitroller, PriceOracle _oracle, uint _closeFactorMantissa, uint _maxAssets, bool reinitializing) public {\n        require(msg.sender 
    == unitroller.admin(), \"only unitroller admin can change brains\");\n        uint changeStatus = unitroller._acceptImplementation();\n\n        
    require(changeStatus == 0, \"change not authorized\");\n\n        if (!reinitializing) {\n            Comptroller freshBrainedComptroller = 
    Comptroller(address(unitroller));\n\n            // Ensure invoke _setPriceOracle() = 0\n            uint err = freshBrainedComptroller
    ._setPriceOracle(_oracle);\n            require (err == uint(Error.NO_ERROR), \"set price oracle error\");\n\n            // Ensure invoke 
    _setCloseFactor() = 0\n            err = freshBrainedComptroller._setCloseFactor(_closeFactorMantissa);\n            require (err == uint(Error
    .NO_ERROR), \"set close factor error\");\n\n            // Ensure invoke _setMaxAssets() = 0\n            err = freshBrainedComptroller
    ._setMaxAssets(_maxAssets);\n            require (err == uint(Error.NO_ERROR), \"set max asssets error\");\n\n            // Ensure invoke 
    _setLiquidationIncentive(liquidationIncentiveMinMantissa) = 0\n            err = freshBrainedComptroller._setLiquidationIncentive
    (liquidationIncentiveMinMantissa);\n            require (err == uint(Error.NO_ERROR), \"set liquidation incentive error\");\n        }\n    }\n\n  
      /**\n     * @dev Check that caller is admin or this contract is initializing itself as\n     * the new implementation.\n     * There should be no 
    way to satisfy msg.sender == comptrollerImplementaiton\n     * without tx.origin also being admin, but both are included for extra safety\n     
    */\n    function adminOrInitializing() internal view returns (bool) {\n        bool initializing = (\n                msg.sender == 
    comptrollerImplementation\n                \u0026\u0026\n                //solium-disable-next-line security/no-tx-origin\n                tx
    .origin == admin\n        );\n        bool isAdmin = msg.sender == admin;\n        return isAdmin || initializing;\n    }\n}\n"}
    ,"ComptrollerInterface.sol":{"content":"pragma solidity ^0.5.8;\n\ninterface ComptrollerInterface {\n    /**\n     * @notice Marker function used 
    for light validation when updating the comptroller of a market\n     * @dev Implementations should simply return true.\n     * @return true\n     
    */\n    function isComptroller() external view returns (bool);\n\n    /*** Assets You Are In ***/\n\n    function enterMarkets(address[] calldata 
    cTokens) external returns (uint[] memory);\n    function exitMarket(address cToken) external returns (uint);\n\n    /*** Policy Hooks ***/\n\n    
    function mintAllowed(address cToken, address minter, uint mintAmount) external returns (uint);\n    function mintVerify(address cToken, address 
    minter, uint mintAmount, uint mintTokens) external;\n\n    function redeemAllowed(address cToken, address redeemer, uint redeemTokens) external 
    returns (uint);\n    function redeemVerify(address cToken, address redeemer, uint redeemAmount, uint redeemTokens) external;\n\n    function 
    borrowAllowed(address cToken, address borrower, uint borrowAmount) external returns (uint);\n    function borrowVerify(address cToken, address 
    borrower, uint borrowAmount) external;\n\n    function repayBorrowAllowed(\n        address cToken,\n        address payer,\n        address 
    borrower,\n        uint repayAmount) external returns (uint);\n    function repayBorrowVerify(\n        address cToken,\n        address payer,\n  
          address borrower,\n        uint repayAmount,\n        uint borrowerIndex) external;\n\n    function liquidateBorrowAllowed(\n        address 
    cTokenBorrowed,\n        address cTokenCollateral,\n        address liquidator,\n        address borrower,\n        uint repayAmount) external 
    returns (uint);\n    function liquidateBorrowVerify(\n        address cTokenBorrowed,\n        address cTokenCollateral,\n        address 
    liquidator,\n        address borrower,\n        uint repayAmount,\n        uint seizeTokens) external;\n\n    function seizeAllowed(\n        
    address cTokenCollateral,\n        address cTokenBorrowed,\n        address liquidator,\n        address borrower,\n        uint seizeTokens) 
    external returns (uint);\n    function seizeVerify(\n        address cTokenCollateral,\n        address cTokenBorrowed,\n        address liquidator
    ,\n        address borrower,\n        uint seizeTokens) external;\n\n    function transferAllowed(address cToken, address src, address dst, uint 
    transferTokens) external returns (uint);\n    function transferVerify(address cToken, address src, address dst, uint transferTokens) external;\n\n 
       /*** Liquidity/Liquidation Calculations ***/\n\n    function liquidateCalculateSeizeTokens(\n        address cTokenBorrowed,\n        address 
    cTokenCollateral,\n        uint repayAmount) external view returns (uint, uint);\n}\n"},"ComptrollerStorage.sol":{"content":"pragma solidity ^0.5.8
    ;\n\nimport \"./CToken.sol\";\nimport \"./PriceOracle.sol\";\n\ncontract UnitrollerAdminStorage {\n    /**\n    * @notice Administrator for this 
    contract\n    */\n    address public admin;\n\n    /**\n    * @notice Pending administrator for this contract\n    */\n    address public 
    pendingAdmin;\n\n    /**\n    * @notice Active brains of Unitroller\n    */\n    address public comptrollerImplementation;\n\n    /**\n    * 
    @notice Pending brains of Unitroller\n    */\n    address public pendingComptrollerImplementation;\n}\n\ncontract ComptrollerV1Storage is 
    UnitrollerAdminStorage {\n\n    /**\n     * @notice Oracle which gives the price of any given asset\n     */\n    PriceOracle public oracle;\n\n   
     /**\n     * @notice Multiplier used to calculate the maximum repayAmount when liquidating a borrow\n     */\n    uint public closeFactorMantissa
    ;\n\n    /**\n     * @notice Multiplier representing the discount on collateral that a liquidator receives\n     */\n    uint public 
    liquidationIncentiveMantissa;\n\n    /**\n     * @notice Max number of assets a single account can participate in (borrow or use as collateral)\n  
       */\n    uint public maxAssets;\n\n    /**\n     * @notice Per-account mapping of \"assets you are in\", capped by maxAssets\n     */\n    
    mapping(address =\u003e CToken[]) public accountAssets;\n\n}\n"},"CToken.sol":{"content":"pragma solidity ^0.5.8;\n\nimport \"
    ./ComptrollerInterface.sol\";\nimport \"./ErrorReporter.sol\";\nimport \"./Exponential.sol\";\nimport \"./EIP20Interface.sol\";\nimport \"
    ./EIP20NonStandardInterface.sol\";\nimport \"./ReentrancyGuard.sol\";\nimport \"./InterestRateModel.sol\";\n\n/**\n * @title Compound\u0027s CToken 
    Contract\n * @notice Abstract base for CTokens\n * @author Compound\n */\ncontract CToken is EIP20Interface, Exponential, TokenErrorReporter, 
    ReentrancyGuard {\n    /**\n     * @notice Indicator that this is a CToken contract (for inspection)\n     */\n    bool public constant isCToken = 
    true;\n\n    /**\n     * @notice EIP-20 token name for this token\n     */\n    string public name;\n\n    /**\n     * @notice EIP-20 token symbol 
    for this token\n     */\n    string public symbol;\n\n    /**\n     * @notice EIP-20 token decimals for this token\n     */\n    uint public 
    decimals;\n\n    /**\n     * @notice Maximum borrow rate that can ever be applied (.0005% / block)\n     */\n    uint constant 
    borrowRateMaxMantissa = 5e14;\n\n    /**\n     * @notice Maximum fraction of interest that can be set aside for reserves\n     */\n    uint 
    constant reserveFactorMaxMantissa = 1e18;\n\n    /**\n     * @notice Administrator for this contract\n     */\n    address payable public admin
    ;\n\n    /**\n     * @notice Pending administrator for this contract\n     */\n    address payable public pendingAdmin;\n\n    /**\n     * @notice 
    Contract which oversees inter-cToken operations\n     */\n    ComptrollerInterface public comptroller;\n\n    /**\n     * @notice Model which tells 
    what the current interest rate should be\n     */\n    InterestRateModel public interestRateModel;\n\n    /**\n     * @notice Initial exchange rate 
    used when minting the first CTokens (used when totalSupply = 0)\n     */\n    uint public initialExchangeRateMantissa;\n\n    /**\n     * @notice 
    Fraction of interest currently set aside for reserves\n     */\n    uint public reserveFactorMantissa;\n\n    /**\n     * @notice Block number that 
    interest was last accrued at\n     */\n    uint public accrualBlockNumber;\n\n    /**\n     * @notice Accumulator of total earned interest since 
    the opening of the market\n     */\n    uint public borrowIndex;\n\n    /**\n     * @notice Total amount of outstanding borrows of the underlying 
    in this market\n     */\n    uint public totalBorrows;\n\n    /**\n     * @notice Total amount of reserves of the underlying held in this market\n 
        */\n    uint public totalReserves;\n\n    /**\n     * @notice Total number of tokens in circulation\n     */\n    uint256 public totalSupply
    ;\n\n    /**\n     * @notice Official record of token balances for each account\n     */\n    mapping (address =\u003e uint256) accountTokens;\n\n 
       /**\n     * @notice Approved token transfer amounts on behalf of others\n     */\n    mapping (address =\u003e mapping (address =\u003e uint256
    )) transferAllowances;\n\n    /**\n     * @notice Container for borrow balance information\n     * @member principal Total balance (with accrued 
    interest), after applying the most recent balance-changing action\n     * @member interestIndex Global borrowIndex as of the most recent balance
    -changing action\n     */\n    struct BorrowSnapshot {\n        uint principal;\n        uint interestIndex;\n    }\n\n    /**\n     * @notice 
    Mapping of account addresses to outstanding borrow balances\n     */\n    mapping(address =\u003e BorrowSnapshot) accountBorrows;\n\n\n    /*** 
    Market Events ***/\n\n    /**\n     * @notice Event emitted when interest is accrued\n     */\n    event AccrueInterest(uint interestAccumulated, 
    uint borrowIndex, uint totalBorrows);\n\n    /**\n     * @notice Event emitted when tokens are minted\n     */\n    event Mint(address minter, uint 
    mintAmount, uint mintTokens);\n\n    /**\n     * @notice Event emitted when tokens are redeemed\n     */\n    event Redeem(address redeemer, uint 
    redeemAmount, uint redeemTokens);\n\n    /**\n     * @notice Event emitted when underlying is borrowed\n     */\n    event Borrow(address borrower, 
    uint borrowAmount, uint accountBorrows, uint totalBorrows);\n\n    /**\n     * @notice Event emitted when a borrow is repaid\n     */\n    event 
    RepayBorrow(address payer, address borrower, uint repayAmount, uint accountBorrows, uint totalBorrows);\n\n    /**\n     * @notice Event emitted 
    when a borrow is liquidated\n     */\n    event LiquidateBorrow(address liquidator, address borrower, uint repayAmount, address cTokenCollateral, 
    uint seizeTokens);\n\n\n    /*** Admin Events ***/\n\n    /**\n     * @notice Event emitted when pendingAdmin is changed\n     */\n    event 
    NewPendingAdmin(address oldPendingAdmin, address newPendingAdmin);\n\n    /**\n     * @notice Event emitted when pendingAdmin is accepted, which 
    means admin is updated\n     */\n    event NewAdmin(address oldAdmin, address newAdmin);\n\n    /**\n     * @notice Event emitted when comptroller 
    is changed\n     */\n    event NewComptroller(ComptrollerInterface oldComptroller, ComptrollerInterface newComptroller);\n\n    /**\n     * @notice 
    Event emitted when interestRateModel is changed\n     */\n    event NewMarketInterestRateModel(InterestRateModel oldInterestRateModel, 
    InterestRateModel newInterestRateModel);\n\n    /**\n     * @notice Event emitted when the reserve factor is changed\n     */\n    event 
    NewReserveFactor(uint oldReserveFactorMantissa, uint newReserveFactorMantissa);\n\n    /**\n     * @notice Event emitted when the reserves are 
    reduced\n     */\n    event ReservesReduced(address admin, uint reduceAmount, uint newTotalReserves);\n\n\n    /**\n     * @notice Construct a new 
    money market\n     * @param comptroller_ The address of the Comptroller\n     * @param interestRateModel_ The address of the interest rate model\n 
        * @param initialExchangeRateMantissa_ The initial exchange rate, scaled by 1e18\n     * @param name_ EIP-20 name of this token\n     * @param 
    symbol_ EIP-20 symbol of this token\n     * @param decimals_ EIP-20 decimal precision of this token\n     */\n    constructor(ComptrollerInterface 
    comptroller_,\n                InterestRateModel interestRateModel_,\n                uint initialExchangeRateMantissa_,\n                string 
    memory name_,\n                string memory symbol_,\n                uint decimals_) internal {\n        // Set admin to msg.sender\n        
    admin = msg.sender;\n\n        // Set initial exchange rate\n        initialExchangeRateMantissa = initialExchangeRateMantissa_;\n        require
    (initialExchangeRateMantissa \u003e 0, \"Initial exchange rate must be greater than zero.\");\n\n        // Set the comptroller\n        uint err = 
    _setComptroller(comptroller_);\n        require(err == uint(Error.NO_ERROR), \"Setting comptroller failed\");\n\n        // Initialize block number 
    and borrow index (block number mocks depend on comptroller being set)\n        accrualBlockNumber = getBlockNumber();\n        borrowIndex = 
    mantissaOne;\n\n        // Set the interest rate model (depends on block number / borrow index)\n        err = _setInterestRateModelFresh
    (interestRateModel_);\n        require(err == uint(Error.NO_ERROR), \"Setting interest rate model failed\");\n\n        name = name_;\n        
    symbol = symbol_;\n        decimals = decimals_;\n    }\n\n    /**\n     * @notice Transfer `tokens` tokens from `src` to `dst` by `spender`\n     
    * @dev Called by both `transfer` and `transferFrom` internally\n     * @param spender The address of the account performing the transfer\n     * 
    @param src The address of the source account\n     * @param dst The address of the destination account\n     * @param tokens The number of tokens 
    to transfer\n     * @return Whether or not the transfer succeeded\n     */\n    function transferTokens(address spender, address src, address dst, 
    uint tokens) internal returns (uint) {\n        /* Fail if transfer not allowed */\n        uint allowed = comptroller.transferAllowed(address(this
    ), src, dst, tokens);\n        if (allowed != 0) {\n            return failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo
    .TRANSFER_COMPTROLLER_REJECTION, allowed);\n        }\n\n        /* Do not allow self-transfers */\n        if (src == dst) {\n            return 
    fail(Error.BAD_INPUT, FailureInfo.TRANSFER_NOT_ALLOWED);\n        }\n\n        /* Get the allowance, infinite for the account owner */\n        
    uint startingAllowance = 0;\n        if (spender == src) {\n            startingAllowance = uint(-1);\n        } else {\n            
    startingAllowance = transferAllowances[src][spender];\n        }\n\n        /* Do the calculations, checking for {under,over}flow */\n        
    MathError mathErr;\n        uint allowanceNew;\n        uint srcTokensNew;\n        uint dstTokensNew;\n\n        (mathErr, allowanceNew) = subUInt
    (startingAllowance, tokens);\n        if (mathErr != MathError.NO_ERROR) {\n            return fail(Error.MATH_ERROR, FailureInfo
    .TRANSFER_NOT_ALLOWED);\n        }\n\n        (mathErr, srcTokensNew) = subUInt(accountTokens[src], tokens);\n        if (mathErr != MathError
    .NO_ERROR) {\n            return fail(Error.MATH_ERROR, FailureInfo.TRANSFER_NOT_ENOUGH);\n        }\n\n        (mathErr, dstTokensNew) = addUInt
    (accountTokens[dst], tokens);\n        if (mathErr != MathError.NO_ERROR) {\n            return fail(Error.MATH_ERROR, FailureInfo
    .TRANSFER_TOO_MUCH);\n        }\n\n        /////////////////////////\n        // EFFECTS \u0026 INTERACTIONS\n        // (No safe failures beyond 
    this point)\n\n        accountTokens[src] = srcTokensNew;\n        accountTokens[dst] = dstTokensNew;\n\n        /* Eat some of the allowance (if 
    necessary) */\n        if (startingAllowance != uint(-1)) {\n            transferAllowances[src][spender] = allowanceNew;\n        }\n\n        /* 
    We emit a Transfer event */\n        emit Transfer(src, dst, tokens);\n\n        /* We call the defense hook (which checks for under
    -collateralization) */\n        comptroller.transferVerify(address(this), src, dst, tokens);\n\n        return uint(Error.NO_ERROR);\n    }\n\n    
    /**\n     * @notice Transfer `amount` tokens from `msg.sender` to `dst`\n     * @param dst The address of the destination account\n     * @param 
    amount The number of tokens to transfer\n     * @return Whether or not the transfer succeeded\n     */\n    function transfer(address dst, uint256 
    amount) external nonReentrant returns (bool) {\n        return transferTokens(msg.sender, msg.sender, dst, amount) == uint(Error.NO_ERROR);\n    
    }\n\n    /**\n     * @notice Transfer `amount` tokens from `src` to `dst`\n     * @param src The address of the source account\n     * @param dst 
    The address of the destination account\n     * @param amount The number of tokens to transfer\n     * @return Whether or not the transfer 
    succeeded\n     */\n    function transferFrom(address src, address dst, uint256 amount) external nonReentrant returns (bool) {\n        return 
    transferTokens(msg.sender, src, dst, amount) == uint(Error.NO_ERROR);\n    }\n\n    /**\n     * @notice Approve `spender` to transfer up to 
    `amount` from `src`\n     * @dev This will overwrite the approval amount for `spender`\n     *  and is subject to issues noted [here](https://eips
    .ethereum.org/EIPS/eip-20#approve)\n     * @param spender The address of the account which may transfer tokens\n     * @param amount The number of 
    tokens that are approved (-1 means infinite)\n     * @return Whether or not the approval succeeded\n     */\n    function approve(address spender, 
    uint256 amount) external returns (bool) {\n        address src = msg.sender;\n        transferAllowances[src][spender] = amount;\n        emit 
    Approval(src, spender, amount);\n        return true;\n    }\n\n    /**\n     * @notice Get the current allowance from `owner` for `spender`\n     
    * @param owner The address of the account which owns the tokens to be spent\n     * @param spender The address of the account which may transfer 
    tokens\n     * @return The number of tokens allowed to be spent (-1 means infinite)\n     */\n    function allowance(address owner, address spender
    ) external view returns (uint256) {\n        return transferAllowances[owner][spender];\n    }\n\n    /**\n     * @notice Get the token balance of 
    the `owner`\n     * @param owner The address of the account to query\n     * @return The number of tokens owned by `owner`\n     */\n    function 
    balanceOf(address owner) external view returns (uint256) {\n        return accountTokens[owner];\n    }\n\n    /**\n     * @notice Get the 
    underlying balance of the `owner`\n     * @dev This also accrues interest in a transaction\n     * @param owner The address of the account to 
    query\n     * @return The amount of underlying owned by `owner`\n     */\n    function balanceOfUnderlying(address owner) external returns (uint) 
    {\n        Exp memory exchangeRate = Exp({mantissa: exchangeRateCurrent()});\n        (MathError mErr, uint balance) = mulScalarTruncate
    (exchangeRate, accountTokens[owner]);\n        require(mErr == MathError.NO_ERROR);\n        return balance;\n    }\n\n    /**\n     * @notice Get 
    a snapshot of the account\u0027s balances, and the cached exchange rate\n     * @dev This is used by comptroller to more efficiently perform 
    liquidity checks.\n     * @param account Address of the account to snapshot\n     * @return (possible error, token balance, borrow balance, 
    exchange rate mantissa)\n     */\n    function getAccountSnapshot(address account) external view returns (uint, uint, uint, uint) {\n        uint 
    cTokenBalance = accountTokens[account];\n        uint borrowBalance;\n        uint exchangeRateMantissa;\n\n        MathError mErr;\n\n        
    (mErr, borrowBalance) = borrowBalanceStoredInternal(account);\n        if (mErr != MathError.NO_ERROR) {\n            return (uint(Error.MATH_ERROR
    ), 0, 0, 0);\n        }\n\n        (mErr, exchangeRateMantissa) = exchangeRateStoredInternal();\n        if (mErr != MathError.NO_ERROR) {\n       
         return (uint(Error.MATH_ERROR), 0, 0, 0);\n        }\n\n        return (uint(Error.NO_ERROR), cTokenBalance, borrowBalance, 
    exchangeRateMantissa);\n    }\n\n    /**\n     * @dev Function to simply retrieve block number\n     *  This exists mainly for inheriting test 
    contracts to stub this result.\n     */\n    function getBlockNumber() internal view returns (uint) {\n        return block.number;\n    }\n\n    
    /**\n     * @notice Returns the current per-block borrow interest rate for this cToken\n     * @return The borrow interest rate per block, scaled 
    by 1e18\n     */\n    function borrowRatePerBlock() external view returns (uint) {\n        (uint opaqueErr, uint borrowRateMantissa) = 
    interestRateModel.getBorrowRate(getCashPrior(), totalBorrows, totalReserves);\n        require(opaqueErr == 0, \"borrowRatePerBlock: 
    interestRateModel.borrowRate failed\"); // semi-opaque\n        return borrowRateMantissa;\n    }\n\n    /**\n     * @notice Returns the current 
    per-block supply interest rate for this cToken\n     * @return The supply interest rate per block, scaled by 1e18\n     */\n    function 
    supplyRatePerBlock() external view returns (uint) {\n        /* We calculate the supply rate:\n         *  underlying = totalSupply × 
    exchangeRate\n         *  borrowsPer = totalBorrows ÷ underlying\n         *  supplyRate = borrowRate × (1-reserveFactor) × borrowsPer\n         
    */\n        uint exchangeRateMantissa = exchangeRateStored();\n\n        (uint e0, uint borrowRateMantissa) = interestRateModel.getBorrowRate
    (getCashPrior(), totalBorrows, totalReserves);\n        require(e0 == 0, \"supplyRatePerBlock: calculating borrowRate failed\"); // semi-opaque\n\n 
           (MathError e1, Exp memory underlying) = mulScalar(Exp({mantissa: exchangeRateMantissa}), totalSupply);\n        require(e1 == MathError
    .NO_ERROR, \"supplyRatePerBlock: calculating underlying failed\");\n\n        (MathError e2, Exp memory borrowsPer) = divScalarByExp(totalBorrows, 
    underlying);\n        require(e2 == MathError.NO_ERROR, \"supplyRatePerBlock: calculating borrowsPer failed\");\n\n        (MathError e3, Exp 
    memory oneMinusReserveFactor) = subExp(Exp({mantissa: mantissaOne}), Exp({mantissa: reserveFactorMantissa}));\n        require(e3 == MathError
    .NO_ERROR, \"supplyRatePerBlock: calculating oneMinusReserveFactor failed\");\n\n        (MathError e4, Exp memory supplyRate) = mulExp3(Exp
    ({mantissa: borrowRateMantissa}), oneMinusReserveFactor, borrowsPer);\n        require(e4 == MathError.NO_ERROR, \"supplyRatePerBlock: calculating 
    supplyRate failed\");\n\n        return supplyRate.mantissa;\n    }\n\n    /**\n     * @notice Returns the current total borrows plus accrued 
    interest\n     * @return The total borrows with interest\n     */\n    function totalBorrowsCurrent() external nonReentrant returns (uint) {\n     
       require(accrueInterest() == uint(Error.NO_ERROR), \"accrue interest failed\");\n        return totalBorrows;\n    }\n\n    /**\n     * @notice 
    Accrue interest to updated borrowIndex and then calculate account\u0027s borrow balance using the updated borrowIndex\n     * @param account The 
    address whose balance should be calculated after updating borrowIndex\n     * @return The calculated balance\n     */\n    function 
    borrowBalanceCurrent(address account) external nonReentrant returns (uint) {\n        require(accrueInterest() == uint(Error.NO_ERROR), \"accrue 
    interest failed\");\n        return borrowBalanceStored(account);\n    }\n\n    /**\n     * @notice Return the borrow balance of account based on 
    stored data\n     * @param account The address whose balance should be calculated\n     * @return The calculated balance\n     */\n    function 
    borrowBalanceStored(address account) public view returns (uint) {\n        (MathError err, uint result) = borrowBalanceStoredInternal(account);\n  
          require(err == MathError.NO_ERROR, \"borrowBalanceStored: borrowBalanceStoredInternal failed\");\n        return result;\n    }\n\n    /**\n 
        * @notice Return the borrow balance of account based on stored data\n     * @param account The address whose balance should be calculated\n    
     * @return (error code, the calculated balance or 0 if error code is non-zero)\n     */\n    function borrowBalanceStoredInternal(address account) 
    internal view returns (MathError, uint) {\n        /* Note: we do not assert that the market is up to date */\n        MathError mathErr;\n        
    uint principalTimesIndex;\n        uint result;\n\n        /* Get borrowBalance and borrowIndex */\n        BorrowSnapshot storage borrowSnapshot = 
    accountBorrows[account];\n\n        /* If borrowBalance = 0 then borrowIndex is likely also 0.\n         * Rather than failing the calculation with 
    a division by 0, we immediately return 0 in this case.\n         */\n        if (borrowSnapshot.principal == 0) {\n            return (MathError
    .NO_ERROR, 0);\n        }\n\n        /* Calculate new borrow balance using the interest index:\n         *  recentBorrowBalance = borrower
    .borrowBalance * market.borrowIndex / borrower.borrowIndex\n         */\n        (mathErr, principalTimesIndex) = mulUInt(borrowSnapshot.principal, 
    borrowIndex);\n        if (mathErr != MathError.NO_ERROR) {\n            return (mathErr, 0);\n        }\n\n        (mathErr, result) = divUInt
    (principalTimesIndex, borrowSnapshot.interestIndex);\n        if (mathErr != MathError.NO_ERROR) {\n            return (mathErr, 0);\n        }\n\n 
           return (MathError.NO_ERROR, result);\n    }\n\n    /**\n     * @notice Accrue interest then return the up-to-date exchange rate\n     * 
    @return Calculated exchange rate scaled by 1e18\n     */\n    function exchangeRateCurrent() public nonReentrant returns (uint) {\n        require
    (accrueInterest() == uint(Error.NO_ERROR), \"accrue interest failed\");\n        return exchangeRateStored();\n    }\n\n    /**\n     * @notice 
    Calculates the exchange rate from the underlying to the CToken\n     * @dev This function does not accrue interest before calculating the exchange 
    rate\n     * @return Calculated exchange rate scaled by 1e18\n     */\n    function exchangeRateStored() public view returns (uint) {\n        
    (MathError err, uint result) = exchangeRateStoredInternal();\n        require(err == MathError.NO_ERROR, \"exchangeRateStored: 
    exchangeRateStoredInternal failed\");\n        return result;\n    }\n\n    /**\n     * @notice Calculates the exchange rate from the underlying to 
    the CToken\n     * @dev This function does not accrue interest before calculating the exchange rate\n     * @return (error code, calculated 
    exchange rate scaled by 1e18)\n     */\n    function exchangeRateStoredInternal() internal view returns (MathError, uint) {\n        if 
    (totalSupply == 0) {\n            /*\n             * If there are no tokens minted:\n             *  exchangeRate = initialExchangeRate\n          
       */\n            return (MathError.NO_ERROR, initialExchangeRateMantissa);\n        } else {\n            /*\n             * Otherwise:\n        
         *  exchangeRate = (totalCash + totalBorrows - totalReserves) / totalSupply\n             */\n            uint totalCash = getCashPrior();\n   
             uint cashPlusBorrowsMinusReserves;\n            Exp memory exchangeRate;\n            MathError mathErr;\n\n            (mathErr, 
    cashPlusBorrowsMinusReserves) = addThenSubUInt(totalCash, totalBorrows, totalReserves);\n            if (mathErr != MathError.NO_ERROR) {\n        
            return (mathErr, 0);\n            }\n\n            (mathErr, exchangeRate) = getExp(cashPlusBorrowsMinusReserves, totalSupply);\n          
      if (mathErr != MathError.NO_ERROR) {\n                return (mathErr, 0);\n            }\n\n            return (MathError.NO_ERROR, exchangeRate
    .mantissa);\n        }\n    }\n\n    /**\n     * @notice Get cash balance of this cToken in the underlying asset\n     * @return The quantity of 
    underlying asset owned by this contract\n     */\n    function getCash() external view returns (uint) {\n        return getCashPrior();\n    }\n\n 
       struct AccrueInterestLocalVars {\n        MathError mathErr;\n        uint opaqueErr;\n        uint borrowRateMantissa;\n        uint 
    currentBlockNumber;\n        uint blockDelta;\n\n        Exp simpleInterestFactor;\n\n        uint interestAccumulated;\n        uint 
    totalBorrowsNew;\n        uint totalReservesNew;\n        uint borrowIndexNew;\n    }\n\n    /**\n      * @notice Applies accrued interest to total 
    borrows and reserves.\n      * @dev This calculates interest accrued from the last checkpointed block\n      *      up to the current block and 
    writes new checkpoint to storage.\n      */\n    function accrueInterest() public returns (uint) {\n        AccrueInterestLocalVars memory vars
    ;\n\n        /* Calculate the current borrow interest rate */\n        (vars.opaqueErr, vars.borrowRateMantissa) = interestRateModel.getBorrowRate
    (getCashPrior(), totalBorrows, totalReserves);\n        require(vars.borrowRateMantissa \u003c= borrowRateMaxMantissa, \"borrow rate is absurdly 
    high\");\n        if (vars.opaqueErr != 0) {\n            return failOpaque(Error.INTEREST_RATE_MODEL_ERROR, FailureInfo
    .ACCRUE_INTEREST_BORROW_RATE_CALCULATION_FAILED, vars.opaqueErr);\n        }\n\n        /* Remember the initial block number */\n        vars
    .currentBlockNumber = getBlockNumber();\n\n        /* Calculate the number of blocks elapsed since the last accrual */\n        (vars.mathErr, vars
    .blockDelta) = subUInt(vars.currentBlockNumber, accrualBlockNumber);\n        assert(vars.mathErr == MathError.NO_ERROR); // Block delta should 
    always succeed and if it doesn\u0027t, blow up.\n\n        /*\n         * Calculate the interest accumulated into borrows and reserves and the new 
    index:\n         *  simpleInterestFactor = borrowRate * blockDelta\n         *  interestAccumulated = simpleInterestFactor * totalBorrows\n        
     *  totalBorrowsNew = interestAccumulated + totalBorrows\n         *  totalReservesNew = interestAccumulated * reserveFactor + totalReserves\n     
        *  borrowIndexNew = simpleInterestFactor * borrowIndex + borrowIndex\n         */\n        (vars.mathErr, vars.simpleInterestFactor) = 
    mulScalar(Exp({mantissa: vars.borrowRateMantissa}), vars.blockDelta);\n        if (vars.mathErr != MathError.NO_ERROR) {\n            return 
    failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_SIMPLE_INTEREST_FACTOR_CALCULATION_FAILED, uint(vars.mathErr));\n        }\n\n        
    (vars.mathErr, vars.interestAccumulated) = mulScalarTruncate(vars.simpleInterestFactor, totalBorrows);\n        if (vars.mathErr != MathError
    .NO_ERROR) {\n            return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_ACCUMULATED_INTEREST_CALCULATION_FAILED, uint(vars
    .mathErr));\n        }\n\n        (vars.mathErr, vars.totalBorrowsNew) = addUInt(vars.interestAccumulated, totalBorrows);\n        if (vars.mathErr 
    != MathError.NO_ERROR) {\n            return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_NEW_TOTAL_BORROWS_CALCULATION_FAILED, uint
    (vars.mathErr));\n        }\n\n        (vars.mathErr, vars.totalReservesNew) = mulScalarTruncateAddUInt(Exp({mantissa: reserveFactorMantissa}), 
    vars.interestAccumulated, totalReserves);\n        if (vars.mathErr != MathError.NO_ERROR) {\n            return failOpaque(Error.MATH_ERROR, 
    FailureInfo.ACCRUE_INTEREST_NEW_TOTAL_RESERVES_CALCULATION_FAILED, uint(vars.mathErr));\n        }\n\n        (vars.mathErr, vars.borrowIndexNew) = 
    mulScalarTruncateAddUInt(vars.simpleInterestFactor, borrowIndex, borrowIndex);\n        if (vars.mathErr != MathError.NO_ERROR) {\n            
    return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_NEW_BORROW_INDEX_CALCULATION_FAILED, uint(vars.mathErr));\n        }\n\n        
    /////////////////////////\n        // EFFECTS \u0026 INTERACTIONS\n        // (No safe failures beyond this point)\n\n        /* We write the 
    previously calculated values into storage */\n        accrualBlockNumber = vars.currentBlockNumber;\n        borrowIndex = vars.borrowIndexNew;\n  
          totalBorrows = vars.totalBorrowsNew;\n        totalReserves = vars.totalReservesNew;\n\n        /* We emit an AccrueInterest event */\n      
      emit AccrueInterest(vars.interestAccumulated, vars.borrowIndexNew, totalBorrows);\n\n        return uint(Error.NO_ERROR);\n    }\n\n    /**\n    
     * @notice Sender supplies assets into the market and receives cTokens in exchange\n     * @dev Accrues interest whether or not the operation 
    succeeds, unless reverted\n     * @param mintAmount The amount of the underlying asset to supply\n     * @return uint 0=success, otherwise a 
    failure (see ErrorReporter.sol for details)\n     */\n    function mintInternal(uint mintAmount) internal nonReentrant returns (uint) {\n        
    uint error = accrueInterest();\n        if (error != uint(Error.NO_ERROR)) {\n            // accrueInterest emits logs on errors, but we still want 
    to log the fact that an attempted borrow failed\n            return fail(Error(error), FailureInfo.MINT_ACCRUE_INTEREST_FAILED);\n        }\n      
      // mintFresh emits the actual Mint event if successful and logs on errors, so we don\u0027t need to\n        return mintFresh(msg.sender, 
    mintAmount);\n    }\n\n    struct MintLocalVars {\n        Error err;\n        MathError mathErr;\n        uint exchangeRateMantissa;\n        uint 
    mintTokens;\n        uint totalSupplyNew;\n        uint accountTokensNew;\n    }\n\n    /**\n     * @notice User supplies assets into the market 
    and receives cTokens in exchange\n     * @dev Assumes interest has already been accrued up to the current block\n     * @param minter The address 
    of the account which is supplying the assets\n     * @param mintAmount The amount of the underlying asset to supply\n     * @return uint 0=success, 
    otherwise a failure (see ErrorReporter.sol for details)\n     */\n    function mintFresh(address minter, uint mintAmount) internal returns (uint) 
    {\n        /* Fail if mint not allowed */\n        uint allowed = comptroller.mintAllowed(address(this), minter, mintAmount);\n        if (allowed 
    != 0) {\n            return failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.MINT_COMPTROLLER_REJECTION, allowed);\n        }\n\n        /* 
    Verify market\u0027s block number equals current block number */\n        if (accrualBlockNumber != getBlockNumber()) {\n            return fail
    (Error.MARKET_NOT_FRESH, FailureInfo.MINT_FRESHNESS_CHECK);\n        }\n\n        MintLocalVars memory vars;\n\n        /* Fail if checkTransferIn 
    fails */\n        vars.err = checkTransferIn(minter, mintAmount);\n        if (vars.err != Error.NO_ERROR) {\n            return fail(vars.err, 
    FailureInfo.MINT_TRANSFER_IN_NOT_POSSIBLE);\n        }\n\n        /*\n         * We get the current exchange rate and calculate the number of 
    cTokens to be minted:\n         *  mintTokens = mintAmount / exchangeRate\n         */\n        (vars.mathErr, vars.exchangeRateMantissa) = 
    exchangeRateStoredInternal();\n        if (vars.mathErr != MathError.NO_ERROR) {\n            return failOpaque(Error.MATH_ERROR, FailureInfo
    .MINT_EXCHANGE_RATE_READ_FAILED, uint(vars.mathErr));\n        }\n\n        (vars.mathErr, vars.mintTokens) = divScalarByExpTruncate(mintAmount, 
    Exp({mantissa: vars.exchangeRateMantissa}));\n        if (vars.mathErr != MathError.NO_ERROR) {\n            return failOpaque(Error.MATH_ERROR, 
    FailureInfo.MINT_EXCHANGE_CALCULATION_FAILED, uint(vars.mathErr));\n        }\n\n        /*\n         * We calculate the new total supply of 
    cTokens and minter token balance, checking for overflow:\n         *  totalSupplyNew = totalSupply + mintTokens\n         *  accountTokensNew = 
    accountTokens[minter] + mintTokens\n         */\n        (vars.mathErr, vars.totalSupplyNew) = addUInt(totalSupply, vars.mintTokens);\n        if 
    (vars.mathErr != MathError.NO_ERROR) {\n            return failOpaque(Error.MATH_ERROR, FailureInfo.MINT_NEW_TOTAL_SUPPLY_CALCULATION_FAILED, uint
    (vars.mathErr));\n        }\n\n        (vars.mathErr, vars.accountTokensNew) = addUInt(accountTokens[minter], vars.mintTokens);\n        if (vars
    .mathErr != MathError.NO_ERROR) {\n            return failOpaque(Error.MATH_ERROR, FailureInfo.MINT_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED, uint
    (vars.mathErr));\n        }\n\n        /////////////////////////\n        // EFFECTS \u0026 INTERACTIONS\n        // (No safe failures beyond this 
    point)\n\n        /*\n         * We call doTransferIn for the minter and the mintAmount\n         *  Note: The cToken must handle variations 
    between ERC-20 and ETH underlying.\n         *  On success, the cToken holds an additional mintAmount of cash.\n         *  If doTransferIn fails 
    despite the fact we checked pre-conditions,\n         *   we revert because we can\u0027t be sure if side effects occurred.\n         */\n        
    vars.err = doTransferIn(minter, mintAmount);\n        if (vars.err != Error.NO_ERROR) {\n            return fail(vars.err, FailureInfo
    .MINT_TRANSFER_IN_FAILED);\n        }\n\n        /* We write previously calculated values into storage */\n        totalSupply = vars
    .totalSupplyNew;\n        accountTokens[minter] = vars.accountTokensNew;\n\n        /* We emit a Mint event, and a Transfer event */\n        emit 
    Mint(minter, mintAmount, vars.mintTokens);\n        emit Transfer(address(this), minter, vars.mintTokens);\n\n        /* We call the defense hook 
    */\n        comptroller.mintVerify(address(this), minter, mintAmount, vars.mintTokens);\n\n        return uint(Error.NO_ERROR);\n    }\n\n    /**\n 
        * @notice Sender redeems cTokens in exchange for the underlying asset\n     * @dev Accrues interest whether or not the operation succeeds, 
    unless reverted\n     * @param redeemTokens The number of cTokens to redeem into underlying\n     * @return uint 0=success, otherwise a failure 
    (see ErrorReporter.sol for details)\n     */\n    function redeemInternal(uint redeemTokens) internal nonReentrant returns (uint) {\n        uint 
    error = accrueInterest();\n        if (error != uint(Error.NO_ERROR)) {\n            // accrueInterest emits logs on errors, but we still want to 
    log the fact that an attempted redeem failed\n            return fail(Error(error), FailureInfo.REDEEM_ACCRUE_INTEREST_FAILED);\n        }\n       
     // redeemFresh emits redeem-specific logs on errors, so we don\u0027t need to\n        return redeemFresh(msg.sender, redeemTokens, 0);\n    }\n\n 
       /**\n     * @notice Sender redeems cTokens in exchange for a specified amount of underlying asset\n     * @dev Accrues interest whether or not 
    the operation succeeds, unless reverted\n     * @param redeemAmount The amount of underlying to redeem\n     * @return uint 0=success, otherwise a 
    failure (see ErrorReporter.sol for details)\n     */\n    function redeemUnderlyingInternal(uint redeemAmount) internal nonReentrant returns (uint) 
    {\n        uint error = accrueInterest();\n        if (error != uint(Error.NO_ERROR)) {\n            // accrueInterest emits logs on errors, but we 
    still want to log the fact that an attempted redeem failed\n            return fail(Error(error), FailureInfo.REDEEM_ACCRUE_INTEREST_FAILED);\n    
        }\n        // redeemFresh emits redeem-specific logs on errors, so we don\u0027t need to\n        return redeemFresh(msg.sender, 0, 
    redeemAmount);\n    }\n\n    struct RedeemLocalVars {\n        Error err;\n        MathError mathErr;\n        uint exchangeRateMantissa;\n        
    uint redeemTokens;\n        uint redeemAmount;\n        uint totalSupplyNew;\n        uint accountTokensNew;\n    }\n\n    /**\n     * @notice User 
    redeems cTokens in exchange for the underlying asset\n     * @dev Assumes interest has already been accrued up to the current block\n     * @param 
    redeemer The address of the account which is redeeming the tokens\n     * @param redeemTokensIn The number of cTokens to redeem into underlying 
    (only one of redeemTokensIn or redeemAmountIn may be zero)\n     * @param redeemAmountIn The number of cTokens to redeem into underlying (only one 
    of redeemTokensIn or redeemAmountIn may be zero)\n     * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)\n     */\n 
       function redeemFresh(address payable redeemer, uint redeemTokensIn, uint redeemAmountIn) internal returns (uint) {\n        require
    (redeemTokensIn == 0 || redeemAmountIn == 0, \"one of redeemTokensIn or redeemAmountIn must be zero\");\n\n        RedeemLocalVars memory vars;\n\n 
           /* exchangeRate = invoke Exchange Rate Stored() */\n        (vars.mathErr, vars.exchangeRateMantissa) = exchangeRateStoredInternal();\n     
       if (vars.mathErr != MathError.NO_ERROR) {\n            return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_EXCHANGE_RATE_READ_FAILED, uint
    (vars.mathErr));\n        }\n\n        /* If redeemTokensIn \u003e 0: */\n        if (redeemTokensIn \u003e 0) {\n            /*\n             * We 
    calculate the exchange rate and the amount of underlying to be redeemed:\n             *  redeemTokens = redeemTokensIn\n             *  
    redeemAmount = redeemTokensIn x exchangeRateCurrent\n             */\n            vars.redeemTokens = redeemTokensIn;\n\n            (vars.mathErr, 
    vars.redeemAmount) = mulScalarTruncate(Exp({mantissa: vars.exchangeRateMantissa}), redeemTokensIn);\n            if (vars.mathErr != MathError
    .NO_ERROR) {\n                return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_EXCHANGE_TOKENS_CALCULATION_FAILED, uint(vars.mathErr));\n    
            }\n        } else {\n            /*\n             * We get the current exchange rate and calculate the amount to be redeemed:\n            
     *  redeemTokens = redeemAmountIn / exchangeRate\n             *  redeemAmount = redeemAmountIn\n             */\n\n            (vars.mathErr, vars
    .redeemTokens) = divScalarByExpTruncate(redeemAmountIn, Exp({mantissa: vars.exchangeRateMantissa}));\n            if (vars.mathErr != MathError
    .NO_ERROR) {\n                return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_EXCHANGE_AMOUNT_CALCULATION_FAILED, uint(vars.mathErr));\n    
            }\n\n            vars.redeemAmount = redeemAmountIn;\n        }\n\n        /* Fail if redeem not allowed */\n        uint allowed = 
    comptroller.redeemAllowed(address(this), redeemer, vars.redeemTokens);\n        if (allowed != 0) {\n            return failOpaque(Error
    .COMPTROLLER_REJECTION, FailureInfo.REDEEM_COMPTROLLER_REJECTION, allowed);\n        }\n\n        /* Verify market\u0027s block number equals 
    current block number */\n        if (accrualBlockNumber != getBlockNumber()) {\n            return fail(Error.MARKET_NOT_FRESH, FailureInfo
    .REDEEM_FRESHNESS_CHECK);\n        }\n\n        /*\n         * We calculate the new total supply and redeemer balance, checking for underflow:\n   
          *  totalSupplyNew = totalSupply - redeemTokens\n         *  accountTokensNew = accountTokens[redeemer] - redeemTokens\n         */\n        
    (vars.mathErr, vars.totalSupplyNew) = subUInt(totalSupply, vars.redeemTokens);\n        if (vars.mathErr != MathError.NO_ERROR) {\n            
    return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_NEW_TOTAL_SUPPLY_CALCULATION_FAILED, uint(vars.mathErr));\n        }\n\n        (vars
    .mathErr, vars.accountTokensNew) = subUInt(accountTokens[redeemer], vars.redeemTokens);\n        if (vars.mathErr != MathError.NO_ERROR) {\n       
         return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED, uint(vars.mathErr));\n        }\n\n        /* 
    Fail gracefully if protocol has insufficient cash */\n        if (getCashPrior() \u003c vars.redeemAmount) {\n            return fail(Error
    .TOKEN_INSUFFICIENT_CASH, FailureInfo.REDEEM_TRANSFER_OUT_NOT_POSSIBLE);\n        }\n\n        /////////////////////////\n        // EFFECTS \u0026 
    INTERACTIONS\n        // (No safe failures beyond this point)\n\n        /*\n         * We invoke doTransferOut for the redeemer and the 
    redeemAmount.\n         *  Note: The cToken must handle variations between ERC-20 and ETH underlying.\n         *  On success, the cToken has 
    redeemAmount less of cash.\n         *  If doTransferOut fails despite the fact we checked pre-conditions,\n         *   we revert because we 
    can\u0027t be sure if side effects occurred.\n         */\n        vars.err = doTransferOut(redeemer, vars.redeemAmount);\n        require(vars.err 
    == Error.NO_ERROR, \"redeem transfer out failed\");\n\n        /* We write previously calculated values into storage */\n        totalSupply = vars
    .totalSupplyNew;\n        accountTokens[redeemer] = vars.accountTokensNew;\n\n        /* We emit a Transfer event, and a Redeem event */\n        
    emit Transfer(redeemer, address(this), vars.redeemTokens);\n        emit Redeem(redeemer, vars.redeemAmount, vars.redeemTokens);\n\n        /* We 
    call the defense hook */\n        comptroller.redeemVerify(address(this), redeemer, vars.redeemAmount, vars.redeemTokens);\n\n        return uint
    (Error.NO_ERROR);\n    }\n\n    /**\n      * @notice Sender borrows assets from the protocol to their own address\n      * @param borrowAmount The 
    amount of the underlying asset to borrow\n      * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)\n      */\n    
    function borrowInternal(uint borrowAmount) internal nonReentrant returns (uint) {\n        uint error = accrueInterest();\n        if (error != 
    uint(Error.NO_ERROR)) {\n            // accrueInterest emits logs on errors, but we still want to log the fact that an attempted borrow failed\n   
             return fail(Error(error), FailureInfo.BORROW_ACCRUE_INTEREST_FAILED);\n        }\n        // borrowFresh emits borrow-specific logs on 
    errors, so we don\u0027t need to\n        return borrowFresh(msg.sender, borrowAmount);\n    }\n\n    struct BorrowLocalVars {\n        Error err
    ;\n        MathError mathErr;\n        uint accountBorrows;\n        uint accountBorrowsNew;\n        uint totalBorrowsNew;\n    }\n\n    /**\n    
      * @notice Users borrow assets from the protocol to their own address\n      * @param borrowAmount The amount of the underlying asset to borrow\n 
         * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)\n      */\n    function borrowFresh(address payable borrower
    , uint borrowAmount) internal returns (uint) {\n        /* Fail if borrow not allowed */\n        uint allowed = comptroller.borrowAllowed(address
    (this), borrower, borrowAmount);\n        if (allowed != 0) {\n            return failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo
    .BORROW_COMPTROLLER_REJECTION, allowed);\n        }\n\n        /* Verify market\u0027s block number equals current block number */\n        if 
    (accrualBlockNumber != getBlockNumber()) {\n            return fail(Error.MARKET_NOT_FRESH, FailureInfo.BORROW_FRESHNESS_CHECK);\n        }\n\n    
        /* Fail gracefully if protocol has insufficient underlying cash */\n        if (getCashPrior() \u003c borrowAmount) {\n            return fail
    (Error.TOKEN_INSUFFICIENT_CASH, FailureInfo.BORROW_CASH_NOT_AVAILABLE);\n        }\n\n        BorrowLocalVars memory vars;\n\n        /*\n         
    * We calculate the new borrower and total borrow balances, failing on overflow:\n         *  accountBorrowsNew = accountBorrows + borrowAmount\n   
          *  totalBorrowsNew = totalBorrows + borrowAmount\n         */\n        (vars.mathErr, vars.accountBorrows) = borrowBalanceStoredInternal
    (borrower);\n        if (vars.mathErr != MathError.NO_ERROR) {\n            return failOpaque(Error.MATH_ERROR, FailureInfo
    .BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED, uint(vars.mathErr));\n        }\n\n        (vars.mathErr, vars.accountBorrowsNew) = addUInt(vars
    .accountBorrows, borrowAmount);\n        if (vars.mathErr != MathError.NO_ERROR) {\n            return failOpaque(Error.MATH_ERROR, FailureInfo
    .BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED, uint(vars.mathErr));\n        }\n\n        (vars.mathErr, vars.totalBorrowsNew) = addUInt
    (totalBorrows, borrowAmount);\n        if (vars.mathErr != MathError.NO_ERROR) {\n            return failOpaque(Error.MATH_ERROR, FailureInfo
    .BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED, uint(vars.mathErr));\n        }\n\n        /////////////////////////\n        // EFFECTS \u0026 
    INTERACTIONS\n        // (No safe failures beyond this point)\n\n        /*\n         * We invoke doTransferOut for the borrower and the 
    borrowAmount.\n         *  Note: The cToken must handle variations between ERC-20 and ETH underlying.\n         *  On success, the cToken 
    borrowAmount less of cash.\n         *  If doTransferOut fails despite the fact we checked pre-conditions,\n         *   we revert because we 
    can\u0027t be sure if side effects occurred.\n         */\n        vars.err = doTransferOut(borrower, borrowAmount);\n        require(vars.err == 
    Error.NO_ERROR, \"borrow transfer out failed\");\n\n        /* We write the previously calculated values into storage */\n        
    accountBorrows[borrower].principal = vars.accountBorrowsNew;\n        accountBorrows[borrower].interestIndex = borrowIndex;\n        totalBorrows = 
    vars.totalBorrowsNew;\n\n        /* We emit a Borrow event */\n        emit Borrow(borrower, borrowAmount, vars.accountBorrowsNew, vars
    .totalBorrowsNew);\n\n        /* We call the defense hook */\n        comptroller.borrowVerify(address(this), borrower, borrowAmount);\n\n        
    return uint(Error.NO_ERROR);\n    }\n\n    /**\n     * @notice Sender repays their own borrow\n     * @param repayAmount The amount to repay\n     
    * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)\n     */\n    function repayBorrowInternal(uint repayAmount) 
    internal nonReentrant returns (uint) {\n        uint error = accrueInterest();\n        if (error != uint(Error.NO_ERROR)) {\n            // 
    accrueInterest emits logs on errors, but we still want to log the fact that an attempted borrow failed\n            return fail(Error(error), 
    FailureInfo.REPAY_BORROW_ACCRUE_INTEREST_FAILED);\n        }\n        // repayBorrowFresh emits repay-borrow-specific logs on errors, so we 
    don\u0027t need to\n        return repayBorrowFresh(msg.sender, msg.sender, repayAmount);\n    }\n\n    /**\n     * @notice Sender repays a borrow 
    belonging to borrower\n     * @param borrower the account with the debt being payed off\n     * @param repayAmount The amount to repay\n     * 
    @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)\n     */\n    function repayBorrowBehalfInternal(address borrower, 
    uint repayAmount) internal nonReentrant returns (uint) {\n        uint error = accrueInterest();\n        if (error != uint(Error.NO_ERROR)) {\n   
             // accrueInterest emits logs on errors, but we still want to log the fact that an attempted borrow failed\n            return fail(Error
    (error), FailureInfo.REPAY_BEHALF_ACCRUE_INTEREST_FAILED);\n        }\n        // repayBorrowFresh emits repay-borrow-specific logs on errors, so 
    we don\u0027t need to\n        return repayBorrowFresh(msg.sender, borrower, repayAmount);\n    }\n\n    struct RepayBorrowLocalVars {\n        
    Error err;\n        MathError mathErr;\n        uint repayAmount;\n        uint borrowerIndex;\n        uint accountBorrows;\n        uint 
    accountBorrowsNew;\n        uint totalBorrowsNew;\n    }\n\n    /**\n     * @notice Borrows are repaid by another user (possibly the borrower).\n  
       * @param payer the account paying off the borrow\n     * @param borrower the account with the debt being payed off\n     * @param repayAmount 
    the amount of undelrying tokens being returned\n     * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)\n     */\n  
      function repayBorrowFresh(address payer, address borrower, uint repayAmount) internal returns (uint) {\n        /* Fail if repayBorrow not 
    allowed */\n        uint allowed = comptroller.repayBorrowAllowed(address(this), payer, borrower, repayAmount);\n        if (allowed != 0) {\n     
           return failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.REPAY_BORROW_COMPTROLLER_REJECTION, allowed);\n        }\n\n        /* Verify 
    market\u0027s block number equals current block number */\n        if (accrualBlockNumber != getBlockNumber()) {\n            return fail(Error
    .MARKET_NOT_FRESH, FailureInfo.REPAY_BORROW_FRESHNESS_CHECK);\n        }\n\n        RepayBorrowLocalVars memory vars;\n\n        /* We remember the 
    original borrowerIndex for verification purposes */\n        vars.borrowerIndex = accountBorrows[borrower].interestIndex;\n\n        /* We fetch 
    the amount the borrower owes, with accumulated interest */\n        (vars.mathErr, vars.accountBorrows) = borrowBalanceStoredInternal(borrower);\n 
           if (vars.mathErr != MathError.NO_ERROR) {\n            return failOpaque(Error.MATH_ERROR, FailureInfo
    .REPAY_BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED, uint(vars.mathErr));\n        }\n\n        /* If repayAmount == -1, repayAmount = 
    accountBorrows */\n        if (repayAmount == uint(-1)) {\n            vars.repayAmount = vars.accountBorrows;\n        } else {\n            vars
    .repayAmount = repayAmount;\n        }\n\n        /* Fail if checkTransferIn fails */\n        vars.err = checkTransferIn(payer, vars.repayAmount
    );\n        if (vars.err != Error.NO_ERROR) {\n            return fail(vars.err, FailureInfo.REPAY_BORROW_TRANSFER_IN_NOT_POSSIBLE);\n        }\n\n 
           /*\n         * We calculate the new borrower and total borrow balances, failing on underflow:\n         *  accountBorrowsNew = 
    accountBorrows - repayAmount\n         *  totalBorrowsNew = totalBorrows - repayAmount\n         */\n        (vars.mathErr, vars.accountBorrowsNew) 
    = subUInt(vars.accountBorrows, vars.repayAmount);\n        if (vars.mathErr != MathError.NO_ERROR) {\n            return failOpaque(Error
    .MATH_ERROR, FailureInfo.REPAY_BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED, uint(vars.mathErr));\n        }\n\n        (vars.mathErr, vars
    .totalBorrowsNew) = subUInt(totalBorrows, vars.repayAmount);\n        if (vars.mathErr != MathError.NO_ERROR) {\n            return failOpaque
    (Error.MATH_ERROR, FailureInfo.REPAY_BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED, uint(vars.mathErr));\n        }\n\n        
    /////////////////////////\n        // EFFECTS \u0026 INTERACTIONS\n        // (No safe failures beyond this point)\n\n        /*\n         * We 
    call doTransferIn for the payer and the repayAmount\n         *  Note: The cToken must handle variations between ERC-20 and ETH underlying.\n      
       *  On success, the cToken holds an additional repayAmount of cash.\n         *  If doTransferIn fails despite the fact we checked pre-conditions
    ,\n         *   we revert because we can\u0027t be sure if side effects occurred.\n         */\n        vars.err = doTransferIn(payer, vars
    .repayAmount);\n        require(vars.err == Error.NO_ERROR, \"repay borrow transfer in failed\");\n\n        /* We write the previously calculated 
    values into storage */\n        accountBorrows[borrower].principal = vars.accountBorrowsNew;\n        accountBorrows[borrower].interestIndex = 
    borrowIndex;\n        totalBorrows = vars.totalBorrowsNew;\n\n        /* We emit a RepayBorrow event */\n        emit RepayBorrow(payer, borrower, 
    vars.repayAmount, vars.accountBorrowsNew, vars.totalBorrowsNew);\n\n        /* We call the defense hook */\n        comptroller.repayBorrowVerify
    (address(this), payer, borrower, vars.repayAmount, vars.borrowerIndex);\n\n        return uint(Error.NO_ERROR);\n    }\n\n    /**\n     * @notice 
    The sender liquidates the borrowers collateral.\n     *  The collateral seized is transferred to the liquidator.\n     * @param borrower The 
    borrower of this cToken to be liquidated\n     * @param cTokenCollateral The market in which to seize collateral from the borrower\n     * @param 
    repayAmount The amount of the underlying borrowed asset to repay\n     * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for 
    details)\n     */\n    function liquidateBorrowInternal(address borrower, uint repayAmount, CToken cTokenCollateral) internal nonReentrant returns 
    (uint) {\n        uint error = accrueInterest();\n        if (error != uint(Error.NO_ERROR)) {\n            // accrueInterest emits logs on errors, 
    but we still want to log the fact that an attempted liquidation failed\n            return fail(Error(error), FailureInfo
    .LIQUIDATE_ACCRUE_BORROW_INTEREST_FAILED);\n        }\n\n        error = cTokenCollateral.accrueInterest();\n        if (error != uint(Error
    .NO_ERROR)) {\n            // accrueInterest emits logs on errors, but we still want to log the fact that an attempted liquidation failed\n        
        return fail(Error(error), FailureInfo.LIQUIDATE_ACCRUE_COLLATERAL_INTEREST_FAILED);\n        }\n\n        // liquidateBorrowFresh emits borrow
    -specific logs on errors, so we don\u0027t need to\n        return liquidateBorrowFresh(msg.sender, borrower, repayAmount, cTokenCollateral);\n    
    }\n\n    /**\n     * @notice The liquidator liquidates the borrowers collateral.\n     *  The collateral seized is transferred to the liquidator.\n 
        * @param borrower The borrower of this cToken to be liquidated\n     * @param liquidator The address repaying the borrow and seizing 
    collateral\n     * @param cTokenCollateral The market in which to seize collateral from the borrower\n     * @param repayAmount The amount of the 
    underlying borrowed asset to repay\n     * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)\n     */\n    function 
    liquidateBorrowFresh(address liquidator, address borrower, uint repayAmount, CToken cTokenCollateral) internal returns (uint) {\n        /* Fail if 
    liquidate not allowed */\n        uint allowed = comptroller.liquidateBorrowAllowed(address(this), address(cTokenCollateral), liquidator, borrower, 
    repayAmount);\n        if (allowed != 0) {\n            return failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.LIQUIDATE_COMPTROLLER_REJECTION, 
    allowed);\n        }\n\n        /* Verify market\u0027s block number equals current block number */\n        if (accrualBlockNumber != 
    getBlockNumber()) {\n            return fail(Error.MARKET_NOT_FRESH, FailureInfo.LIQUIDATE_FRESHNESS_CHECK);\n        }\n\n        /* Verify 
    cTokenCollateral market\u0027s block number equals current block number */\n        if (cTokenCollateral.accrualBlockNumber() != getBlockNumber()) 
    {\n            return fail(Error.MARKET_NOT_FRESH, FailureInfo.LIQUIDATE_COLLATERAL_FRESHNESS_CHECK);\n        }\n\n        /* Fail if borrower = 
    liquidator */\n        if (borrower == liquidator) {\n            return fail(Error.INVALID_ACCOUNT_PAIR, FailureInfo
    .LIQUIDATE_LIQUIDATOR_IS_BORROWER);\n        }\n\n        /* Fail if repayAmount = 0 */\n        if (repayAmount == 0) {\n            return fail
    (Error.INVALID_CLOSE_AMOUNT_REQUESTED, FailureInfo.LIQUIDATE_CLOSE_AMOUNT_IS_ZERO);\n        }\n\n        /* Fail if repayAmount = -1 */\n        
    if (repayAmount == uint(-1)) {\n            return fail(Error.INVALID_CLOSE_AMOUNT_REQUESTED, FailureInfo.LIQUIDATE_CLOSE_AMOUNT_IS_UINT_MAX);\n   
         }\n\n        /* We calculate the number of collateral tokens that will be seized */\n        (uint amountSeizeError, uint seizeTokens) = 
    comptroller.liquidateCalculateSeizeTokens(address(this), address(cTokenCollateral), repayAmount);\n        if (amountSeizeError != 0) {\n          
      return failOpaque(Error.COMPTROLLER_CALCULATION_ERROR, FailureInfo.LIQUIDATE_COMPTROLLER_CALCULATE_AMOUNT_SEIZE_FAILED, amountSeizeError);\n     
       }\n\n        /* Fail if seizeTokens \u003e borrower collateral token balance */\n        if (seizeTokens \u003e cTokenCollateral.balanceOf
    (borrower)) {\n            return fail(Error.TOKEN_INSUFFICIENT_BALANCE, FailureInfo.LIQUIDATE_SEIZE_TOO_MUCH);\n        }\n\n        /* Fail if 
    repayBorrow fails */\n        uint repayBorrowError = repayBorrowFresh(liquidator, borrower, repayAmount);\n        if (repayBorrowError != uint
    (Error.NO_ERROR)) {\n            return fail(Error(repayBorrowError), FailureInfo.LIQUIDATE_REPAY_BORROW_FRESH_FAILED);\n        }\n\n        /* 
    Revert if seize tokens fails (since we cannot be sure of side effects) */\n        uint seizeError = cTokenCollateral.seize(liquidator, borrower, 
    seizeTokens);\n        require(seizeError == uint(Error.NO_ERROR), \"token seizure failed\");\n\n        /* We emit a LiquidateBorrow event */\n   
         emit LiquidateBorrow(liquidator, borrower, repayAmount, address(cTokenCollateral), seizeTokens);\n\n        /* We call the defense hook */\n  
          comptroller.liquidateBorrowVerify(address(this), address(cTokenCollateral), liquidator, borrower, repayAmount, seizeTokens);\n\n        
    return uint(Error.NO_ERROR);\n    }\n\n    /**\n     * @notice Transfers collateral tokens (this market) to the liquidator.\n     * @dev Will fail 
    unless called by another cToken during the process of liquidation.\n     *  Its absolutely critical to use msg.sender as the borrowed cToken and 
    not a parameter.\n     * @param liquidator The account receiving seized collateral\n     * @param borrower The account having collateral seized\n  
       * @param seizeTokens The number of cTokens to seize\n     * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)\n   
      */\n    function seize(address liquidator, address borrower, uint seizeTokens) external nonReentrant returns (uint) {\n        /* Fail if seize 
    not allowed */\n        uint allowed = comptroller.seizeAllowed(address(this), msg.sender, liquidator, borrower, seizeTokens);\n        if (allowed 
    != 0) {\n            return failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.LIQUIDATE_SEIZE_COMPTROLLER_REJECTION, allowed);\n        }\n\n    
        /* Fail if borrower = liquidator */\n        if (borrower == liquidator) {\n            return fail(Error.INVALID_ACCOUNT_PAIR, FailureInfo
    .LIQUIDATE_SEIZE_LIQUIDATOR_IS_BORROWER);\n        }\n\n        MathError mathErr;\n        uint borrowerTokensNew;\n        uint 
    liquidatorTokensNew;\n\n        /*\n         * We calculate the new borrower and liquidator token balances, failing on underflow/overflow:\n       
      *  borrowerTokensNew = accountTokens[borrower] - seizeTokens\n         *  liquidatorTokensNew = accountTokens[liquidator] + seizeTokens\n        
     */\n        (mathErr, borrowerTokensNew) = subUInt(accountTokens[borrower], seizeTokens);\n        if (mathErr != MathError.NO_ERROR) {\n         
       return failOpaque(Error.MATH_ERROR, FailureInfo.LIQUIDATE_SEIZE_BALANCE_DECREMENT_FAILED, uint(mathErr));\n        }\n\n        (mathErr, 
    liquidatorTokensNew) = addUInt(accountTokens[liquidator], seizeTokens);\n        if (mathErr != MathError.NO_ERROR) {\n            return 
    failOpaque(Error.MATH_ERROR, FailureInfo.LIQUIDATE_SEIZE_BALANCE_INCREMENT_FAILED, uint(mathErr));\n        }\n\n        
    /////////////////////////\n        // EFFECTS \u0026 INTERACTIONS\n        // (No safe failures beyond this point)\n\n        /* We write the 
    previously calculated values into storage */\n        accountTokens[borrower] = borrowerTokensNew;\n        accountTokens[liquidator] = 
    liquidatorTokensNew;\n\n        /* Emit a Transfer event */\n        emit Transfer(borrower, liquidator, seizeTokens);\n\n        /* We call the 
    defense hook */\n        comptroller.seizeVerify(address(this), msg.sender, liquidator, borrower, seizeTokens);\n\n        return uint(Error
    .NO_ERROR);\n    }\n\n\n    /*** Admin Functions ***/\n\n    /**\n      * @notice Begins transfer of admin rights. The newPendingAdmin must call 
    `_acceptAdmin` to finalize the transfer.\n      * @dev Admin function to begin change of admin. The newPendingAdmin must call `_acceptAdmin` to 
    finalize the transfer.\n      * @param newPendingAdmin New pending admin.\n      * @return uint 0=success, otherwise a failure (see ErrorReporter
    .sol for details)\n      *\n      * TODO: Should we add a second arg to verify, like a checksum of `newAdmin` address?\n      */\n    function 
    _setPendingAdmin(address payable newPendingAdmin) external returns (uint) {\n        // Check caller = admin\n        if (msg.sender != admin) {\n 
               return fail(Error.UNAUTHORIZED, FailureInfo.SET_PENDING_ADMIN_OWNER_CHECK);\n        }\n\n        // Save current value, if any, for 
    inclusion in log\n        address oldPendingAdmin = pendingAdmin;\n\n        // Store pendingAdmin with value newPendingAdmin\n        pendingAdmin 
    = newPendingAdmin;\n\n        // Emit NewPendingAdmin(oldPendingAdmin, newPendingAdmin)\n        emit NewPendingAdmin(oldPendingAdmin, 
    newPendingAdmin);\n\n        return uint(Error.NO_ERROR);\n    }\n\n    /**\n      * @notice Accepts transfer of admin rights. msg.sender must be 
    pendingAdmin\n      * @dev Admin function for pending admin to accept role and update admin\n      * @return uint 0=success, otherwise a failure 
    (see ErrorReporter.sol for details)\n      */\n    function _acceptAdmin() external returns (uint) {\n        // Check caller is pendingAdmin and 
    pendingAdmin ≠ address(0)\n        if (msg.sender != pendingAdmin || msg.sender == address(0)) {\n            return fail(Error.UNAUTHORIZED, 
    FailureInfo.ACCEPT_ADMIN_PENDING_ADMIN_CHECK);\n        }\n\n        // Save current values for inclusion in log\n        address oldAdmin = admin
    ;\n        address oldPendingAdmin = pendingAdmin;\n\n        // Store admin with value pendingAdmin\n        admin = pendingAdmin;\n\n        // 
    Clear the pending value\n        pendingAdmin = address(0);\n\n        emit NewAdmin(oldAdmin, admin);\n        emit NewPendingAdmin
    (oldPendingAdmin, pendingAdmin);\n\n        return uint(Error.NO_ERROR);\n    }\n\n    /**\n      * @notice Sets a new comptroller for the market\n 
         * @dev Admin function to set a new comptroller\n      * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)\n     
     */\n    function _setComptroller(ComptrollerInterface newComptroller) public returns (uint) {\n        // Check caller is admin\n        if (msg
    .sender != admin) {\n            return fail(Error.UNAUTHORIZED, FailureInfo.SET_COMPTROLLER_OWNER_CHECK);\n        }\n\n        
    ComptrollerInterface oldComptroller = comptroller;\n        // Ensure invoke comptroller.isComptroller() returns true\n        require
    (newComptroller.isComptroller(), \"marker method returned false\");\n\n        // Set market\u0027s comptroller to newComptroller\n        
    comptroller = newComptroller;\n\n        // Emit NewComptroller(oldComptroller, newComptroller)\n        emit NewComptroller(oldComptroller, 
    newComptroller);\n\n        return uint(Error.NO_ERROR);\n    }\n\n    /**\n      * @notice accrues interest and sets a new reserve factor for the 
    protocol using _setReserveFactorFresh\n      * @dev Admin function to accrue interest and set a new reserve factor\n      * @return uint 0=success, 
    otherwise a failure (see ErrorReporter.sol for details)\n      */\n    function _setReserveFactor(uint newReserveFactorMantissa) external 
    nonReentrant returns (uint) {\n        uint error = accrueInterest();\n        if (error != uint(Error.NO_ERROR)) {\n            // accrueInterest 
    emits logs on errors, but on top of that we want to log the fact that an attempted reserve factor change failed.\n            return fail(Error
    (error), FailureInfo.SET_RESERVE_FACTOR_ACCRUE_INTEREST_FAILED);\n        }\n        // _setReserveFactorFresh emits reserve-factor-specific logs 
    on errors, so we don\u0027t need to.\n        return _setReserveFactorFresh(newReserveFactorMantissa);\n    }\n\n    /**\n      * @notice Sets a 
    new reserve factor for the protocol (*requires fresh interest accrual)\n      * @dev Admin function to set a new reserve factor\n      * @return 
    uint 0=success, otherwise a failure (see ErrorReporter.sol for details)\n      */\n    function _setReserveFactorFresh(uint 
    newReserveFactorMantissa) internal returns (uint) {\n        // Check caller is admin\n        if (msg.sender != admin) {\n            return fail
    (Error.UNAUTHORIZED, FailureInfo.SET_RESERVE_FACTOR_ADMIN_CHECK);\n        }\n\n        // Verify market\u0027s block number equals current block 
    number\n        if (accrualBlockNumber != getBlockNumber()) {\n            // TODO: static_assert + no error code?\n            return fail(Error
    .MARKET_NOT_FRESH, FailureInfo.SET_RESERVE_FACTOR_FRESH_CHECK);\n        }\n\n        // Check newReserveFactor ≤ maxReserveFactor\n        if 
    (newReserveFactorMantissa \u003e reserveFactorMaxMantissa) {\n            return fail(Error.BAD_INPUT, FailureInfo.SET_RESERVE_FACTOR_BOUNDS_CHECK
    );\n        }\n\n        uint oldReserveFactorMantissa = reserveFactorMantissa;\n        reserveFactorMantissa = newReserveFactorMantissa;\n\n     
       emit NewReserveFactor(oldReserveFactorMantissa, newReserveFactorMantissa);\n\n        return uint(Error.NO_ERROR);\n    }\n\n    /**\n     * 
    @notice Accrues interest and reduces reserves by transferring to admin\n     * @param reduceAmount Amount of reduction to reserves\n     * @return 
    uint 0=success, otherwise a failure (see ErrorReporter.sol for details)\n     */\n    function _reduceReserves(uint reduceAmount) external 
    nonReentrant returns (uint) {\n        uint error = accrueInterest();\n        if (error != uint(Error.NO_ERROR)) {\n            // accrueInterest 
    emits logs on errors, but on top of that we want to log the fact that an attempted reduce reserves failed.\n            return fail(Error(error), 
    FailureInfo.REDUCE_RESERVES_ACCRUE_INTEREST_FAILED);\n        }\n        // _reduceReservesFresh emits reserve-reduction-specific logs on errors, 
    so we don\u0027t need to.\n        return _reduceReservesFresh(reduceAmount);\n    }\n\n    /**\n     * @notice Reduces reserves by transferring to 
    admin\n     * @dev Requires fresh interest accrual\n     * @param reduceAmount Amount of reduction to reserves\n     * @return uint 0=success, 
    otherwise a failure (see ErrorReporter.sol for details)\n     */\n    function _reduceReservesFresh(uint reduceAmount) internal returns (uint) {\n 
           Error err;\n        // totalReserves - reduceAmount\n        uint totalReservesNew;\n\n        // Check caller is admin\n        if (msg
    .sender != admin) {\n            return fail(Error.UNAUTHORIZED, FailureInfo.REDUCE_RESERVES_ADMIN_CHECK);\n        }\n\n        // We fail 
    gracefully unless market\u0027s block number equals current block number\n        if (accrualBlockNumber != getBlockNumber()) {\n            // 
    TODO: static_assert + no error code?\n            return fail(Error.MARKET_NOT_FRESH, FailureInfo.REDUCE_RESERVES_FRESH_CHECK);\n        }\n\n     
       // Fail gracefully if protocol has insufficient underlying cash\n        if (getCashPrior() \u003c reduceAmount) {\n            return fail
    (Error.TOKEN_INSUFFICIENT_CASH, FailureInfo.REDUCE_RESERVES_CASH_NOT_AVAILABLE);\n        }\n\n        // Check reduceAmount ≤ reserves[n] 
    (totalReserves)\n        // TODO: I\u0027m following the spec literally here but I think we should we just use SafeMath instead and fail on an 
    error (which would be underflow)\n        if (reduceAmount \u003e totalReserves) {\n            return fail(Error.BAD_INPUT, FailureInfo
    .REDUCE_RESERVES_VALIDATION);\n        }\n\n        /////////////////////////\n        // EFFECTS \u0026 INTERACTIONS\n        // (No safe failures 
    beyond this point)\n\n        totalReservesNew = totalReserves - reduceAmount;\n        // We checked reduceAmount \u003c= totalReserves above, so 
    this should never revert.\n        require(totalReservesNew \u003c= totalReserves, \"reduce reserves unexpected underflow\");\n\n        // Store 
    reserves[n+1] = reserves[n] - reduceAmount\n        totalReserves = totalReservesNew;\n\n        // invoke doTransferOut(reduceAmount, admin)\n    
        err = doTransferOut(admin, reduceAmount);\n        // we revert on the failure of this command\n        require(err == Error.NO_ERROR, \"reduce 
    reserves transfer out failed\");\n\n        emit ReservesReduced(admin, reduceAmount, totalReservesNew);\n\n        return uint(Error.NO_ERROR);\n 
       }\n\n    /**\n     * @notice accrues interest and updates the interest rate model using _setInterestRateModelFresh\n     * @dev Admin function 
    to accrue interest and update the interest rate model\n     * @param newInterestRateModel the new interest rate model to use\n     * @return uint 0
    =success, otherwise a failure (see ErrorReporter.sol for details)\n     */\n    function _setInterestRateModel(InterestRateModel 
    newInterestRateModel) public returns (uint) {\n        uint error = accrueInterest();\n        if (error != uint(Error.NO_ERROR)) {\n            // 
    accrueInterest emits logs on errors, but on top of that we want to log the fact that an attempted change of interest rate model failed\n           
     return fail(Error(error), FailureInfo.SET_INTEREST_RATE_MODEL_ACCRUE_INTEREST_FAILED);\n        }\n        // _setInterestRateModelFresh emits 
    interest-rate-model-update-specific logs on errors, so we don\u0027t need to.\n        return _setInterestRateModelFresh(newInterestRateModel);\n  
      }\n\n    /**\n     * @notice updates the interest rate model (*requires fresh interest accrual)\n     * @dev Admin function to update the 
    interest rate model\n     * @param newInterestRateModel the new interest rate model to use\n     * @return uint 0=success, otherwise a failure (see 
    ErrorReporter.sol for details)\n     */\n    function _setInterestRateModelFresh(InterestRateModel newInterestRateModel) internal returns (uint) 
    {\n\n        // Used to store old model for use in the event that is emitted on success\n        InterestRateModel oldInterestRateModel;\n\n       
     // Check caller is admin\n        if (msg.sender != admin) {\n            return fail(Error.UNAUTHORIZED, FailureInfo
    .SET_INTEREST_RATE_MODEL_OWNER_CHECK);\n        }\n\n        // We fail gracefully unless market\u0027s block number equals current block number\n 
           if (accrualBlockNumber != getBlockNumber()) {\n            // TODO: static_assert + no error code?\n            return fail(Error
    .MARKET_NOT_FRESH, FailureInfo.SET_INTEREST_RATE_MODEL_FRESH_CHECK);\n        }\n\n        // Track the market\u0027s current interest rate model\n 
           oldInterestRateModel = interestRateModel;\n\n        // Ensure invoke newInterestRateModel.isInterestRateModel() returns true\n        
    require(newInterestRateModel.isInterestRateModel(), \"marker method returned false\");\n\n        // Set the interest rate model to 
    newInterestRateModel\n        interestRateModel = newInterestRateModel;\n\n        // Emit NewMarketInterestRateModel(oldInterestRateModel, 
    newInterestRateModel)\n        emit NewMarketInterestRateModel(oldInterestRateModel, newInterestRateModel);\n\n        return uint(Error.NO_ERROR
    );\n    }\n\n    /*** Safe Token ***/\n\n    /**\n     * @notice Gets balance of this contract in terms of the underlying\n     * @dev This 
    excludes the value of the current message, if any\n     * @return The quantity of underlying owned by this contract\n     */\n    function 
    getCashPrior() internal view returns (uint);\n\n    /**\n     * @dev Checks whether or not there is sufficient allowance for this contract to move 
    amount from `from` and\n     *      whether or not `from` has a balance of at least `amount`. Does NOT do a transfer.\n     */\n    function 
    checkTransferIn(address from, uint amount) internal view returns (Error);\n\n    /**\n     * @dev Performs a transfer in, ideally returning an 
    explanatory error code upon failure rather than reverting.\n     *  If caller has not called `checkTransferIn`, this may revert due to insufficient 
    balance or insufficient allowance.\n     *  If caller has called `checkTransferIn` successfully, this should not revert in normal conditions.\n    
     */\n    function doTransferIn(address from, uint amount) internal returns (Error);\n\n    /**\n     * @dev Performs a transfer out, ideally 
    returning an explanatory error code upon failure tather than reverting.\n     *  If caller has not called checked protocol\u0027s balance, may 
    revert due to insufficient cash held in the contract.\n     *  If caller has checked protocol\u0027s balance, and verified it is \u003e= amount, 
    this should not revert in normal conditions.\n     */\n    function doTransferOut(address payable to, uint amount) internal returns (Error);\n}\n"}
    ,"EIP20Interface.sol":{"content":"pragma solidity ^0.5.8;\n\n/**\n * @title ERC 20 Token Standard Interface\n *  https://eips.ethereum.org/EIPS/eip
    -20\n */\ninterface EIP20Interface {\n\n    /**\n      * @notice Get the total number of tokens in circulation\n      * @return The supply of 
    tokens\n      */\n    function totalSupply() external view returns (uint256);\n\n    /**\n     * @notice Gets the balance of the specified 
    address\n     * @param owner The address from which the balance will be retrieved\n     * @return The balance\n     */\n    function balanceOf
    (address owner) external view returns (uint256 balance);\n\n    /**\n      * @notice Transfer `amount` tokens from `msg.sender` to `dst`\n      * 
    @param dst The address of the destination account\n      * @param amount The number of tokens to transfer\n      * @return Whether or not the 
    transfer succeeded\n      */\n    function transfer(address dst, uint256 amount) external returns (bool success);\n\n    /**\n      * @notice 
    Transfer `amount` tokens from `src` to `dst`\n      * @param src The address of the source account\n      * @param dst The address of the 
    destination account\n      * @param amount The number of tokens to transfer\n      * @return Whether or not the transfer succeeded\n      */\n    
    function transferFrom(address src, address dst, uint256 amount) external returns (bool success);\n\n    /**\n      * @notice Approve `spender` to 
    transfer up to `amount` from `src`\n      * @dev This will overwrite the approval amount for `spender`\n      *  and is subject to issues noted 
    [here](https://eips.ethereum.org/EIPS/eip-20#approve)\n      * @param spender The address of the account which may transfer tokens\n      * @param 
    amount The number of tokens that are approved (-1 means infinite)\n      * @return Whether or not the approval succeeded\n      */\n    function 
    approve(address spender, uint256 amount) external returns (bool success);\n\n    /**\n      * @notice Get the current allowance from `owner` for 
    `spender`\n      * @param owner The address of the account which owns the tokens to be spent\n      * @param spender The address of the account 
    which may transfer tokens\n      * @return The number of tokens allowed to be spent (-1 means infinite)\n      */\n    function allowance(address 
    owner, address spender) external view returns (uint256 remaining);\n\n    event Transfer(address indexed from, address indexed to, uint256 amount
    );\n    event Approval(address indexed owner, address indexed spender, uint256 amount);\n}\n"},"EIP20NonStandardInterface.sol":{"content":"pragma 
    solidity ^0.5.8;\n\n/**\n * @title EIP20NonStandardInterface\n * @dev Version of ERC20 with no return values for `transfer` and `transferFrom`\n * 
     See https://medium.com/coinmonks/missing-return-value-bug-at-least-130-tokens-affected-d67bf08521ca\n */\ninterface EIP20NonStandardInterface 
    {\n\n    /**\n     * @notice Get the total number of tokens in circulation\n     * @return The supply of tokens\n     */\n    function totalSupply
    () external view returns (uint256);\n\n    /**\n     * @notice Gets the balance of the specified address\n     * @param owner The address from 
    which the balance will be retrieved\n     * @return The balance\n     */\n    function balanceOf(address owner) external view returns (uint256 
    balance);\n\n    ///\n    /// !!!!!!!!!!!!!!\n    /// !!! NOTICE !!! `transfer` does not return a value, in violation of the ERC-20 specification\n 
       /// !!!!!!!!!!!!!!\n    ///\n\n    /**\n      * @notice Transfer `amount` tokens from `msg.sender` to `dst`\n      * @param dst The address of 
    the destination account\n      * @param amount The number of tokens to transfer\n      */\n    function transfer(address dst, uint256 amount) 
    external;\n\n    ///\n    /// !!!!!!!!!!!!!!\n    /// !!! NOTICE !!! `transferFrom` does not return a value, in violation of the ERC-20 
    specification\n    /// !!!!!!!!!!!!!!\n    ///\n\n    /**\n      * @notice Transfer `amount` tokens from `src` to `dst`\n      * @param src The 
    address of the source account\n      * @param dst The address of the destination account\n      * @param amount The number of tokens to transfer\n 
         */\n    function transferFrom(address src, address dst, uint256 amount) external;\n\n    /**\n      * @notice Approve `spender` to transfer up 
    to `amount` from `src`\n      * @dev This will overwrite the approval amount for `spender`\n      *  and is subject to issues noted [here](https
    ://eips.ethereum.org/EIPS/eip-20#approve)\n      * @param spender The address of the account which may transfer tokens\n      * @param amount The 
    number of tokens that are approved\n      * @return Whether or not the approval succeeded\n      */\n    function approve(address spender, uint256 
    amount) external returns (bool success);\n\n    /**\n      * @notice Get the current allowance from `owner` for `spender`\n      * @param owner The 
    address of the account which owns the tokens to be spent\n      * @param spender The address of the account which may transfer tokens\n      * 
    @return The number of tokens allowed to be spent\n      */\n    function allowance(address owner, address spender) external view returns (uint256 
    remaining);\n\n    event Transfer(address indexed from, address indexed to, uint256 amount);\n    event Approval(address indexed owner, address 
    indexed spender, uint256 amount);\n}\n"},"ErrorReporter.sol":{"content":"pragma solidity ^0.5.8;\n\ncontract ComptrollerErrorReporter {\n    enum 
    Error {\n        NO_ERROR,\n        UNAUTHORIZED,\n        COMPTROLLER_MISMATCH,\n        INSUFFICIENT_SHORTFALL,\n        INSUFFICIENT_LIQUIDITY
    ,\n        INVALID_CLOSE_FACTOR,\n        INVALID_COLLATERAL_FACTOR,\n        INVALID_LIQUIDATION_INCENTIVE,\n        MARKET_NOT_ENTERED,\n        
    MARKET_NOT_LISTED,\n        MARKET_ALREADY_LISTED,\n        MATH_ERROR,\n        NONZERO_BORROW_BALANCE,\n        PRICE_ERROR,\n        REJECTION
    ,\n        SNAPSHOT_ERROR,\n        TOO_MANY_ASSETS,\n        TOO_MUCH_REPAY\n    }\n\n    enum FailureInfo {\n        
    ACCEPT_ADMIN_PENDING_ADMIN_CHECK,\n        ACCEPT_PENDING_IMPLEMENTATION_ADDRESS_CHECK,\n        EXIT_MARKET_BALANCE_OWED,\n        
    EXIT_MARKET_REJECTION,\n        SET_CLOSE_FACTOR_OWNER_CHECK,\n        SET_CLOSE_FACTOR_VALIDATION,\n        SET_COLLATERAL_FACTOR_OWNER_CHECK,\n  
          SET_COLLATERAL_FACTOR_NO_EXISTS,\n        SET_COLLATERAL_FACTOR_VALIDATION,\n        SET_COLLATERAL_FACTOR_WITHOUT_PRICE,\n        
    SET_IMPLEMENTATION_OWNER_CHECK,\n        SET_LIQUIDATION_INCENTIVE_OWNER_CHECK,\n        SET_LIQUIDATION_INCENTIVE_VALIDATION,\n        
    SET_MAX_ASSETS_OWNER_CHECK,\n        SET_PENDING_ADMIN_OWNER_CHECK,\n        SET_PENDING_IMPLEMENTATION_OWNER_CHECK,\n        
    SET_PRICE_ORACLE_OWNER_CHECK,\n        SUPPORT_MARKET_EXISTS,\n        SUPPORT_MARKET_OWNER_CHECK,\n        ZUNUSED\n    }\n\n    /**\n      * @dev 
    `error` corresponds to enum Error; `info` corresponds to enum FailureInfo, and `detail` is an arbitrary\n      * contract-specific code that 
    enables us to report opaque error codes from upgradeable contracts.\n      **/\n    event Failure(uint error, uint info, uint detail);\n\n    /**\n 
         * @dev use this when reporting a known error from the money market or a non-upgradeable collaborator\n      */\n    function fail(Error err, 
    FailureInfo info) internal returns (uint) {\n        emit Failure(uint(err), uint(info), 0);\n\n        return uint(err);\n    }\n\n    /**\n      
    * @dev use this when reporting an opaque error from an upgradeable collaborator contract\n      */\n    function failOpaque(Error err, FailureInfo 
    info, uint opaqueError) internal returns (uint) {\n        emit Failure(uint(err), uint(info), opaqueError);\n\n        return uint(err);\n    
    }\n}\n\ncontract TokenErrorReporter {\n    enum Error {\n        NO_ERROR,\n        UNAUTHORIZED,\n        BAD_INPUT,\n        
    COMPTROLLER_REJECTION,\n        COMPTROLLER_CALCULATION_ERROR,\n        INTEREST_RATE_MODEL_ERROR,\n        INVALID_ACCOUNT_PAIR,\n        
    INVALID_CLOSE_AMOUNT_REQUESTED,\n        INVALID_COLLATERAL_FACTOR,\n        MATH_ERROR,\n        MARKET_NOT_FRESH,\n        MARKET_NOT_LISTED,\n  
          TOKEN_INSUFFICIENT_ALLOWANCE,\n        TOKEN_INSUFFICIENT_BALANCE,\n        TOKEN_INSUFFICIENT_CASH,\n        TOKEN_TRANSFER_IN_FAILED,\n    
        TOKEN_TRANSFER_OUT_FAILED\n    }\n\n    /*\n     * Note: FailureInfo (but not Error) is kept in alphabetical order\n     *       This is 
    because FailureInfo grows significantly faster, and\n     *       the order of Error has some meaning, while the order of FailureInfo\n     *      
     is entirely arbitrary.\n     */\n    enum FailureInfo {\n        ACCEPT_ADMIN_PENDING_ADMIN_CHECK,\n        
    ACCRUE_INTEREST_ACCUMULATED_INTEREST_CALCULATION_FAILED,\n        ACCRUE_INTEREST_BORROW_RATE_CALCULATION_FAILED,\n        
    ACCRUE_INTEREST_NEW_BORROW_INDEX_CALCULATION_FAILED,\n        ACCRUE_INTEREST_NEW_TOTAL_BORROWS_CALCULATION_FAILED,\n        
    ACCRUE_INTEREST_NEW_TOTAL_RESERVES_CALCULATION_FAILED,\n        ACCRUE_INTEREST_SIMPLE_INTEREST_FACTOR_CALCULATION_FAILED,\n        
    BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED,\n        BORROW_ACCRUE_INTEREST_FAILED,\n        BORROW_CASH_NOT_AVAILABLE,\n        
    BORROW_FRESHNESS_CHECK,\n        BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED,\n        BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED,\n     
       BORROW_MARKET_NOT_LISTED,\n        BORROW_COMPTROLLER_REJECTION,\n        LIQUIDATE_ACCRUE_BORROW_INTEREST_FAILED,\n        
    LIQUIDATE_ACCRUE_COLLATERAL_INTEREST_FAILED,\n        LIQUIDATE_COLLATERAL_FRESHNESS_CHECK,\n        LIQUIDATE_COMPTROLLER_REJECTION,\n        
    LIQUIDATE_COMPTROLLER_CALCULATE_AMOUNT_SEIZE_FAILED,\n        LIQUIDATE_CLOSE_AMOUNT_IS_UINT_MAX,\n        LIQUIDATE_CLOSE_AMOUNT_IS_ZERO,\n       
     LIQUIDATE_FRESHNESS_CHECK,\n        LIQUIDATE_LIQUIDATOR_IS_BORROWER,\n        LIQUIDATE_REPAY_BORROW_FRESH_FAILED,\n        
    LIQUIDATE_SEIZE_BALANCE_INCREMENT_FAILED,\n        LIQUIDATE_SEIZE_BALANCE_DECREMENT_FAILED,\n        LIQUIDATE_SEIZE_COMPTROLLER_REJECTION,\n     
       LIQUIDATE_SEIZE_LIQUIDATOR_IS_BORROWER,\n        LIQUIDATE_SEIZE_TOO_MUCH,\n        MINT_ACCRUE_INTEREST_FAILED,\n        
    MINT_COMPTROLLER_REJECTION,\n        MINT_EXCHANGE_CALCULATION_FAILED,\n        MINT_EXCHANGE_RATE_READ_FAILED,\n        MINT_FRESHNESS_CHECK,\n   
         MINT_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED,\n        MINT_NEW_TOTAL_SUPPLY_CALCULATION_FAILED,\n        MINT_TRANSFER_IN_FAILED,\n        
    MINT_TRANSFER_IN_NOT_POSSIBLE,\n        REDEEM_ACCRUE_INTEREST_FAILED,\n        REDEEM_COMPTROLLER_REJECTION,\n        
    REDEEM_EXCHANGE_TOKENS_CALCULATION_FAILED,\n        REDEEM_EXCHANGE_AMOUNT_CALCULATION_FAILED,\n        REDEEM_EXCHANGE_RATE_READ_FAILED,\n        
    REDEEM_FRESHNESS_CHECK,\n        REDEEM_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED,\n        REDEEM_NEW_TOTAL_SUPPLY_CALCULATION_FAILED,\n        
    REDEEM_TRANSFER_OUT_NOT_POSSIBLE,\n        REDUCE_RESERVES_ACCRUE_INTEREST_FAILED,\n        REDUCE_RESERVES_ADMIN_CHECK,\n        
    REDUCE_RESERVES_CASH_NOT_AVAILABLE,\n        REDUCE_RESERVES_FRESH_CHECK,\n        REDUCE_RESERVES_VALIDATION,\n        
    REPAY_BEHALF_ACCRUE_INTEREST_FAILED,\n        REPAY_BORROW_ACCRUE_INTEREST_FAILED,\n        REPAY_BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED,\n 
           REPAY_BORROW_COMPTROLLER_REJECTION,\n        REPAY_BORROW_FRESHNESS_CHECK,\n        
    REPAY_BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED,\n        REPAY_BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED,\n        
    REPAY_BORROW_TRANSFER_IN_NOT_POSSIBLE,\n        SET_COLLATERAL_FACTOR_OWNER_CHECK,\n        SET_COLLATERAL_FACTOR_VALIDATION,\n        
    SET_COMPTROLLER_OWNER_CHECK,\n        SET_INTEREST_RATE_MODEL_ACCRUE_INTEREST_FAILED,\n        SET_INTEREST_RATE_MODEL_FRESH_CHECK,\n        
    SET_INTEREST_RATE_MODEL_OWNER_CHECK,\n        SET_MAX_ASSETS_OWNER_CHECK,\n        SET_ORACLE_MARKET_NOT_LISTED,\n        
    SET_PENDING_ADMIN_OWNER_CHECK,\n        SET_RESERVE_FACTOR_ACCRUE_INTEREST_FAILED,\n        SET_RESERVE_FACTOR_ADMIN_CHECK,\n        
    SET_RESERVE_FACTOR_FRESH_CHECK,\n        SET_RESERVE_FACTOR_BOUNDS_CHECK,\n        TRANSFER_COMPTROLLER_REJECTION,\n        TRANSFER_NOT_ALLOWED,\n 
           TRANSFER_NOT_ENOUGH,\n        TRANSFER_TOO_MUCH\n    }\n\n    /**\n      * @dev `error` corresponds to enum Error; `info` corresponds to 
    enum FailureInfo, and `detail` is an arbitrary\n      * contract-specific code that enables us to report opaque error codes from upgradeable 
    contracts.\n      **/\n    event Failure(uint error, uint info, uint detail);\n\n    /**\n      * @dev use this when reporting a known error from 
    the money market or a non-upgradeable collaborator\n      */\n    function fail(Error err, FailureInfo info) internal returns (uint) {\n        
    emit Failure(uint(err), uint(info), 0);\n\n        return uint(err);\n    }\n\n    /**\n      * @dev use this when reporting an opaque error from 
    an upgradeable collaborator contract\n      */\n    function failOpaque(Error err, FailureInfo info, uint opaqueError) internal returns (uint) {\n 
           emit Failure(uint(err), uint(info), opaqueError);\n\n        return uint(err);\n    }\n}\n"},"Exponential.sol":{"content":"pragma solidity 
    ^0.5.8;\n\nimport \"./CarefulMath.sol\";\n\n/**\n * @title Exponential module for storing fixed-decision decimals\n * @author Compound\n * @notice 
    Exp is a struct which stores decimals with a fixed precision of 18 decimal places.\n *         Thus, if we wanted to store the 5.1, mantissa would 
    store 5.1e18. That is:\n *         `Exp({mantissa: 5100000000000000000})`.\n */\ncontract Exponential is CarefulMath {\n    uint constant expScale 
    = 1e18;\n    uint constant halfExpScale = expScale/2;\n    uint constant mantissaOne = expScale;\n\n    struct Exp {\n        uint mantissa;\n    
    }\n\n    /**\n     * @dev Creates an exponential from numerator and denominator values.\n     *      Note: Returns an error if (`num` * 10e18) 
    \u003e MAX_INT,\n     *            or if `denom` is zero.\n     */\n    function getExp(uint num, uint denom) pure internal returns (MathError, Exp 
    memory) {\n        (MathError err0, uint scaledNumerator) = mulUInt(num, expScale);\n        if (err0 != MathError.NO_ERROR) {\n            return 
    (err0, Exp({mantissa: 0}));\n        }\n\n        (MathError err1, uint rational) = divUInt(scaledNumerator, denom);\n        if (err1 != MathError
    .NO_ERROR) {\n            return (err1, Exp({mantissa: 0}));\n        }\n\n        return (MathError.NO_ERROR, Exp({mantissa: rational}));\n    
    }\n\n    /**\n     * @dev Adds two exponentials, returning a new exponential.\n     */\n    function addExp(Exp memory a, Exp memory b) pure 
    internal returns (MathError, Exp memory) {\n        (MathError error, uint result) = addUInt(a.mantissa, b.mantissa);\n\n        return (error, Exp
    ({mantissa: result}));\n    }\n\n    /**\n     * @dev Subtracts two exponentials, returning a new exponential.\n     */\n    function subExp(Exp 
    memory a, Exp memory b) pure internal returns (MathError, Exp memory) {\n        (MathError error, uint result) = subUInt(a.mantissa, b.mantissa
    );\n\n        return (error, Exp({mantissa: result}));\n    }\n\n    /**\n     * @dev Multiply an Exp by a scalar, returning a new Exp.\n     */\n 
       function mulScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) {\n        (MathError err0, uint scaledMantissa) = 
    mulUInt(a.mantissa, scalar);\n        if (err0 != MathError.NO_ERROR) {\n            return (err0, Exp({mantissa: 0}));\n        }\n\n        
    return (MathError.NO_ERROR, Exp({mantissa: scaledMantissa}));\n    }\n\n    /**\n     * @dev Multiply an Exp by a scalar, then truncate to return 
    an unsigned integer.\n     */\n    function mulScalarTruncate(Exp memory a, uint scalar) pure internal returns (MathError, uint) {\n        
    (MathError err, Exp memory product) = mulScalar(a, scalar);\n        if (err != MathError.NO_ERROR) {\n            return (err, 0);\n        }\n\n 
           return (MathError.NO_ERROR, truncate(product));\n    }\n\n    /**\n     * @dev Multiply an Exp by a scalar, truncate, then add an to an 
    unsigned integer, returning an unsigned integer.\n     */\n    function mulScalarTruncateAddUInt(Exp memory a, uint scalar, uint addend) pure 
    internal returns (MathError, uint) {\n        (MathError err, Exp memory product) = mulScalar(a, scalar);\n        if (err != MathError.NO_ERROR) 
    {\n            return (err, 0);\n        }\n\n        return addUInt(truncate(product), addend);\n    }\n\n    /**\n     * @dev Divide an Exp by a 
    scalar, returning a new Exp.\n     */\n    function divScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) {\n        
    (MathError err0, uint descaledMantissa) = divUInt(a.mantissa, scalar);\n        if (err0 != MathError.NO_ERROR) {\n            return (err0, Exp
    ({mantissa: 0}));\n        }\n\n        return (MathError.NO_ERROR, Exp({mantissa: descaledMantissa}));\n    }\n\n    /**\n     * @dev Divide a 
    scalar by an Exp, returning a new Exp.\n     */\n    function divScalarByExp(uint scalar, Exp memory divisor) pure internal returns (MathError, Exp 
    memory) {\n        /*\n          We are doing this as:\n          getExp(mulUInt(expScale, scalar), divisor.mantissa)\n\n          How it works:\n 
             Exp = a / b;\n          Scalar = s;\n          `s / (a / b)` = `b * s / a` and since for an Exp `a = mantissa, b = expScale`\n        */\n 
           (MathError err0, uint numerator) = mulUInt(expScale, scalar);\n        if (err0 != MathError.NO_ERROR) {\n            return (err0, Exp
    ({mantissa: 0}));\n        }\n        return getExp(numerator, divisor.mantissa);\n    }\n\n    /**\n     * @dev Divide a scalar by an Exp, then 
    truncate to return an unsigned integer.\n     */\n    function divScalarByExpTruncate(uint scalar, Exp memory divisor) pure internal returns 
    (MathError, uint) {\n        (MathError err, Exp memory fraction) = divScalarByExp(scalar, divisor);\n        if (err != MathError.NO_ERROR) {\n   
             return (err, 0);\n        }\n\n        return (MathError.NO_ERROR, truncate(fraction));\n    }\n\n    /**\n     * @dev Multiplies two 
    exponentials, returning a new exponential.\n     */\n    function mulExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) 
    {\n\n        (MathError err0, uint doubleScaledProduct) = mulUInt(a.mantissa, b.mantissa);\n        if (err0 != MathError.NO_ERROR) {\n            
    return (err0, Exp({mantissa: 0}));\n        }\n\n        // We add half the scale before dividing so that we get rounding instead of truncation.\n 
           //  See \"Listing 6\" and text above it at https://accu.org/index.php/journals/1717\n        // Without this change, a result like 6.6...e
    -19 will be truncated to 0 instead of being rounded to 1e-18.\n        (MathError err1, uint doubleScaledProductWithHalfScale) = addUInt
    (halfExpScale, doubleScaledProduct);\n        if (err1 != MathError.NO_ERROR) {\n            return (err1, Exp({mantissa: 0}));\n        }\n\n     
       (MathError err2, uint product) = divUInt(doubleScaledProductWithHalfScale, expScale);\n        // The only error `div` can return is MathError
    .DIVISION_BY_ZERO but we control `expScale` and it is not zero.\n        assert(err2 == MathError.NO_ERROR);\n\n        return (MathError.NO_ERROR, 
    Exp({mantissa: product}));\n    }\n\n    /**\n     * @dev Multiplies two exponentials given their mantissas, returning a new exponential.\n     
    */\n    function mulExp(uint a, uint b) pure internal returns (MathError, Exp memory) {\n        return mulExp(Exp({mantissa: a}), Exp({mantissa: 
    b}));\n    }\n\n    /**\n     * @dev Multiplies three exponentials, returning a new exponential.\n     */\n    function mulExp3(Exp memory a, Exp 
    memory b, Exp memory c) pure internal returns (MathError, Exp memory) {\n        (MathError err, Exp memory ab) = mulExp(a, b);\n        if (err != 
    MathError.NO_ERROR) {\n            return (err, ab);\n        }\n        return mulExp(ab, c);\n    }\n\n    /**\n     * @dev Divides two 
    exponentials, returning a new exponential.\n     *     (a/scale) / (b/scale) = (a/scale) * (scale/b) = a/b,\n     *  which we can scale as an Exp 
    by calling getExp(a.mantissa, b.mantissa)\n     */\n    function divExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) 
    {\n        return getExp(a.mantissa, b.mantissa);\n    }\n\n    /**\n     * @dev Truncates the given exp to a whole number value.\n     *      For 
    example, truncate(Exp{mantissa: 15 * expScale}) = 15\n     */\n    function truncate(Exp memory exp) pure internal returns (uint) {\n        // 
    Note: We are not using careful math here as we\u0027re performing a division that cannot fail\n        return exp.mantissa / expScale;\n    }\n\n  
      /**\n     * @dev Checks if first Exp is less than second Exp.\n     */\n    function lessThanExp(Exp memory left, Exp memory right) pure internal 
    returns (bool) {\n        return left.mantissa \u003c right.mantissa; //TODO: Add some simple tests and this in another PR yo.\n    }\n\n    /**\n 
        * @dev Checks if left Exp \u003c= right Exp.\n     */\n    function lessThanOrEqualExp(Exp memory left, Exp memory right) pure internal returns 
    (bool) {\n        return left.mantissa \u003c= right.mantissa;\n    }\n\n    /**\n     * @dev returns true if Exp is exactly zero\n     */\n    
    function isZeroExp(Exp memory value) pure internal returns (bool) {\n        return value.mantissa == 0;\n    }\n}\n"},"InterestRateModel.sol"
    :{"content":"pragma solidity ^0.5.8;\n\n/**\n  * @title The Compound InterestRateModel Interface\n  * @author Compound\n  * @notice Any interest 
    rate model should derive from this contract.\n  * @dev These functions are specifically not marked `pure` as implementations of this\n  *      
    contract may read from storage variables.\n  */\ninterface InterestRateModel {\n    /**\n      * @notice Gets the current borrow interest rate 
    based on the given asset, total cash, total borrows\n      *         and total reserves.\n      * @dev The return value should be scaled by 1e18, 
    thus a return value of\n      *      `(true, 1000000000000)` implies an interest rate of 0.000001 or 0.0001% *per block*.\n      * @param cash The 
    total cash of the underlying asset in the CToken\n      * @param borrows The total borrows of the underlying asset in the CToken\n      * @param 
    reserves The total reserves of the underlying asset in the CToken\n      * @return Success or failure and the borrow interest rate per block scaled 
    by 10e18\n      */\n    function getBorrowRate(uint cash, uint borrows, uint reserves) external view returns (uint, uint);\n\n    /**\n      * 
    @notice Marker function used for light validation when updating the interest rate model of a market\n      * @dev Marker function used for light 
    validation when updating the interest rate model of a market. Implementations should simply return true.\n      * @return Success or failure\n     
     */\n    function isInterestRateModel() external view returns (bool);\n}"},"Maximillion.sol":{"content":"pragma solidity ^0.5.8;\n\nimport \"
    ./CEther.sol\";\n\n/**\n * @title Compound\u0027s Maximillion Contract\n * @author Compound\n */\ncontract Maximillion {\n    /**\n     * @notice 
    The default cEther market to repay in\n     */\n    CEther public cEther;\n\n    /**\n     * @notice Construct a Maximillion to repay max in a 
    CEther market\n     */\n    constructor(CEther cEther_) public {\n        cEther = cEther_;\n    }\n\n    /**\n     * @notice msg.sender sends 
    Ether to repay an account\u0027s borrow in the cEther market\n     * @dev The provided Ether is applied towards the borrow balance, any excess is 
    refunded\n     * @param borrower The address of the borrower account to repay on behalf of\n     * @return The initial borrows before the repay\n  
       */\n    function repayBehalf(address borrower) public payable {\n        return repayBehalfExplicit(borrower, cEther);\n    }\n\n    /**\n     * 
    @notice msg.sender sends Ether to repay an account\u0027s borrow in a cEther market\n     * @dev The provided Ether is applied towards the borrow 
    balance, any excess is refunded\n     * @param borrower The address of the borrower account to repay on behalf of\n     * @param cEther_ The 
    address of the cEther contract to repay in\n     * @return The initial borrows before the repay\n     */\n    function repayBehalfExplicit(address 
    borrower, CEther cEther_) public payable {\n        uint received = msg.value;\n        uint borrows = cEther_.borrowBalanceCurrent(borrower);\n   
         if (received \u003e borrows) {\n            cEther_.repayBorrowBehalf.value(borrows)(borrower);\n            msg.sender.transfer(received - 
    borrows);\n        } else {\n            cEther_.repayBorrowBehalf.value(received)(borrower);\n        }\n    }\n}\n"},"PriceOracle.sol":{"content"
    :"pragma solidity ^0.5.8;\n\nimport \"./CToken.sol\";\n\ninterface PriceOracle {\n    /**\n     * @notice Indicator that this is a PriceOracle 
    contract (for inspection)\n     */\n    function isPriceOracle() external pure returns (bool);\n\n    /**\n      * @notice Get the underlying price 
    of a cToken asset\n      * @param cToken The cToken to get the underlying price of\n      * @return The underlying asset price mantissa (scaled by 
    1e18).\n      *  Zero means the price is unavailable.\n      */\n    function getUnderlyingPrice(CToken cToken) external view returns (uint
    );\n}\n"},"PriceOracleProxy.sol":{"content":"pragma solidity ^0.5.8;\n\nimport \"./CErc20.sol\";\nimport \"./CToken.sol\";\nimport \"./PriceOracle
    .sol\";\nimport \"./Comptroller.sol\";\n\ninterface V1PriceOracleInterface {\n    function assetPrices(address asset) external view returns (uint
    );\n}\n\ncontract PriceOracleProxy is PriceOracle {\n    /**\n     * @notice The v1 price oracle, which will continue to serve prices\n     * 
    prices for v1 assets\n     */\n    V1PriceOracleInterface public v1PriceOracle;\n\n    /**\n     * @notice The active comptroller, which will be 
    checked for listing status\n     * to short circuit and return 0 for unlisted assets.\n     *\n     * @dev Listed markets are not part of the 
    comptroller interface used by\n     * cTokens, so we assumena an instance of v1 comptroller.sol instead\n     */\n    Comptroller public 
    comptroller;\n\n    /**\n     * @notice address of the cEther contract, which has a constant price\n     */\n    address public cEtherAddress;\n\n 
       /**\n     * @notice Indicator that this is a PriceOracle contract (for inspection)\n     */\n    bool public constant isPriceOracle = true;\n\n 
       /**\n     * @param comptroller_ The address of the active comptroller, which will\n     * be consulted for market listing status.\n     * @param 
    v1PriceOracle_ The address of the v1 price oracle, which will\n     * continue to operate and hold prices for collateral assets.\n     * @param 
    cEtherAddress_ The address of the cEther contract, which will\n     * return a constant 1e18, since all prices relative to ether\n     */\n    
    constructor(address comptroller_, address v1PriceOracle_, address cEtherAddress_) public {\n        comptroller = Comptroller(comptroller_);\n     
       v1PriceOracle = V1PriceOracleInterface(v1PriceOracle_);\n        cEtherAddress = cEtherAddress_;\n    }\n\n    /**\n     * @notice Get the 
    underlying price of a listed cToken asset\n     * @param cToken The cToken to get the underlying price of\n     * @return The underlying asset 
    price mantissa (scaled by 1e18).\n     *  Zero means the price is unavailable.\n     */\n    function getUnderlyingPrice(CToken cToken) public view 
    returns (uint) {\n        address cTokenAddress = address(cToken);\n        (bool isListed, ) = comptroller.markets(cTokenAddress);\n\n        if 
    (!isListed) {\n            // not listed, worthless\n            return 0;\n        } else if (cTokenAddress == cEtherAddress) {\n            // 
    ether always worth 1\n            return 1e18;\n        } else {\n            // read from v1 oracle\n            address underlying = CErc20
    (cTokenAddress).underlying();\n            return v1PriceOracle.assetPrices(underlying);\n        }\n    }\n}\n"},"ReentrancyGuard.sol":{"content"
    :"pragma solidity ^0.5.8;\n\n/**\n * @title Helps contracts guard against reentrancy attacks.\n * @author Remco Bloemen \u003cremco@2π.com\u003e, 
    Eenae \u003calexey@mixbytes.io\u003e\n * @dev If you mark a function `nonReentrant`, you should also\n * mark it `external`.\n */\ncontract 
    ReentrancyGuard {\n    /// @dev counter to allow mutex lock with only one SSTORE operation\n    uint256 private _guardCounter;\n\n    constructor 
    () internal {\n        // The counter starts at one to prevent changing it from zero to a non-zero\n        // value, which is a more expensive 
    operation.\n        _guardCounter = 1;\n    }\n\n    /**\n     * @dev Prevents a contract from calling itself, directly or indirectly.\n     * 
    Calling a `nonReentrant` function from another `nonReentrant`\n     * function is not supported. It is possible to prevent this from happening\n   
      * by making the `nonReentrant` function external, and make it call a\n     * `private` function that does the actual work.\n     */\n    modifier 
    nonReentrant() {\n        _guardCounter += 1;\n        uint256 localCounter = _guardCounter;\n        _;\n        require(localCounter == 
    _guardCounter, \"re-entered\");\n    }\n}\n"},"SimplePriceOracle.sol":{"content":"pragma solidity ^0.5.8;\n\nimport \"./PriceOracle.sol\";\nimport 
    \"./CErc20.sol\";\n\ncontract SimplePriceOracle is PriceOracle {\n    mapping(address =\u003e uint) prices;\n    bool public constant isPriceOracle 
    = true;\n\n    function getUnderlyingPrice(CToken cToken) public view returns (uint) {\n        return prices[address(CErc20(address(cToken
    )).underlying())];\n    }\n\n    function setUnderlyingPrice(CToken cToken, uint underlyingPriceMantissa) public {\n        prices[address(CErc20
    (address(cToken)).underlying())] = underlyingPriceMantissa;\n    }\n\n    // v1 price oracle interface for use as backing of proxy\n    function 
    assetPrices(address asset) external view returns (uint) {\n        return prices[asset];\n    }\n}\n"},"Unitroller.sol":{"content":"pragma solidity 
    ^0.5.8;\n\nimport \"./ErrorReporter.sol\";\nimport \"./ComptrollerStorage.sol\";\n/**\n * @title ComptrollerCore\n * @dev storage for the 
    comptroller will be at this address, and\n * cTokens should reference this contract rather than a deployed implementation if\n *\n */\ncontract 
    Unitroller is UnitrollerAdminStorage, ComptrollerErrorReporter {\n\n    /**\n      * @notice Emitted when pendingComptrollerImplementation is 
    changed\n      */\n    event NewPendingImplementation(address oldPendingImplementation, address newPendingImplementation);\n\n    /**\n      * 
    @notice Emitted when pendingComptrollerImplementation is accepted, which means comptroller implementation is updated\n      */\n    event 
    NewImplementation(address oldImplementation, address newImplementation);\n\n    /**\n      * @notice Emitted when pendingAdmin is changed\n      
    */\n    event NewPendingAdmin(address oldPendingAdmin, address newPendingAdmin);\n\n    /**\n      * @notice Emitted when pendingAdmin is accepted, 
    which means admin is updated\n      */\n    event NewAdmin(address oldAdmin, address newAdmin);\n\n    constructor() public {\n        // Set admin 
    to caller\n        admin = msg.sender;\n    }\n\n    /*** Admin Functions ***/\n    function _setPendingImplementation(address 
    newPendingImplementation) public returns (uint) {\n\n        if (msg.sender != admin) {\n            return fail(Error.UNAUTHORIZED, FailureInfo
    .SET_PENDING_IMPLEMENTATION_OWNER_CHECK);\n        }\n\n        address oldPendingImplementation = pendingComptrollerImplementation;\n\n        
    pendingComptrollerImplementation = newPendingImplementation;\n\n        emit NewPendingImplementation(oldPendingImplementation, 
    pendingComptrollerImplementation);\n\n        return uint(Error.NO_ERROR);\n    }\n\n    /**\n    * @notice Accepts new implementation of 
    comptroller. msg.sender must be pendingImplementation\n    * @dev Admin function for new implementation to accept it\u0027s role as 
    implementation\n    * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)\n    */\n    function _acceptImplementation() 
    public returns (uint) {\n        // Check caller is pendingImplementation and pendingImplementation ≠ address(0)\n        if (msg.sender != 
    pendingComptrollerImplementation || pendingComptrollerImplementation == address(0)) {\n            return fail(Error.UNAUTHORIZED, FailureInfo
    .ACCEPT_PENDING_IMPLEMENTATION_ADDRESS_CHECK);\n        }\n\n        // Save current values for inclusion in log\n        address oldImplementation 
    = comptrollerImplementation;\n        address oldPendingImplementation = pendingComptrollerImplementation;\n\n        comptrollerImplementation = 
    pendingComptrollerImplementation;\n\n        pendingComptrollerImplementation = address(0);\n\n        emit NewImplementation(oldImplementation, 
    comptrollerImplementation);\n        emit NewPendingImplementation(oldPendingImplementation, pendingComptrollerImplementation);\n\n        return 
    uint(Error.NO_ERROR);\n    }\n\n\n    /**\n      * @notice Begins transfer of admin rights. The newPendingAdmin must call `_acceptAdmin` to 
    finalize the transfer.\n      * @dev Admin function to begin change of admin. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer
    .\n      * @param newPendingAdmin New pending admin.\n      * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)\n    
      *\n      * TODO: Should we add a second arg to verify, like a checksum of `newAdmin` address?\n      */\n    function _setPendingAdmin(address 
    newPendingAdmin) public returns (uint) {\n        // Check caller = admin\n        if (msg.sender != admin) {\n            return fail(Error
    .UNAUTHORIZED, FailureInfo.SET_PENDING_ADMIN_OWNER_CHECK);\n        }\n\n        // Save current value, if any, for inclusion in log\n        
    address oldPendingAdmin = pendingAdmin;\n\n        // Store pendingAdmin with value newPendingAdmin\n        pendingAdmin = newPendingAdmin;\n\n   
         // Emit NewPendingAdmin(oldPendingAdmin, newPendingAdmin)\n        emit NewPendingAdmin(oldPendingAdmin, newPendingAdmin);\n\n        return 
    uint(Error.NO_ERROR);\n    }\n\n    /**\n      * @notice Accepts transfer of admin rights. msg.sender must be pendingAdmin\n      * @dev Admin 
    function for pending admin to accept role and update admin\n      * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details
    )\n      */\n    function _acceptAdmin() public returns (uint) {\n        // Check caller is pendingAdmin and pendingAdmin ≠ address(0)\n        if 
    (msg.sender != pendingAdmin || msg.sender == address(0)) {\n            return fail(Error.UNAUTHORIZED, FailureInfo
    .ACCEPT_ADMIN_PENDING_ADMIN_CHECK);\n        }\n\n        // Save current values for inclusion in log\n        address oldAdmin = admin;\n        
    address oldPendingAdmin = pendingAdmin;\n\n        // Store admin with value pendingAdmin\n        admin = pendingAdmin;\n\n        // Clear the 
    pending value\n        pendingAdmin = address(0);\n\n        emit NewAdmin(oldAdmin, admin);\n        emit NewPendingAdmin(oldPendingAdmin, 
    pendingAdmin);\n\n        return uint(Error.NO_ERROR);\n    }\n\n    /**\n     * @dev Delegates execution to an implementation contract.\n     * It 
    returns to the external caller whatever the implementation returns\n     * or forwards reverts.\n     */\n    function () payable external {\n     
       // delegate all other functions to current implementation\n        (bool success, ) = comptrollerImplementation.delegatecall(msg.data);\n\n     
       // solium-disable-next-line security/no-inline-assembly\n        assembly {\n              let free_mem_ptr := mload(0x40)\n              
    returndatacopy(free_mem_ptr, 0, returndatasize)\n\n              switch success\n              case 0 { revert(free_mem_ptr, returndatasize) }\n   
               default { return(free_mem_ptr, returndatasize) }\n        }\n    }\n}\n"},"WhitePaperInterestRateModel.sol":{"content":"pragma solidity 
    ^0.5.8;\n\nimport \"./Exponential.sol\";\nimport \"./InterestRateModel.sol\";\n\n/**\n  * @title The Compound Standard Interest Rate Model with 
    pluggable constants\n  * @author Compound\n  * @notice See Section 2.4 of the Compound Whitepaper\n  */\ncontract WhitePaperInterestRateModel is 
    InterestRateModel, Exponential {\n    /**\n     * @notice Indicator that this is an InterestRateModel contract (for inspection)\n     */\n    bool 
    public constant isInterestRateModel = true;\n\n    /**\n     * @notice The multiplier of utilization rate that gives the slope of the interest 
    rate\n     */\n    uint public multiplier;\n\n    /**\n     * @notice The base interest rate which is the y-intercept when utilization rate is 0\n 
        */\n    uint public baseRate;\n\n    /**\n     * @notice The approximate number of blocks per year that is assumed by the interest rate model\n 
        */\n    uint public constant blocksPerYear = 2102400;\n\n    constructor(uint baseRate_, uint multiplier_) public {\n        baseRate = 
    baseRate_;\n        multiplier = multiplier_;\n    }\n\n    enum IRError {\n        NO_ERROR,\n        FAILED_TO_ADD_CASH_PLUS_BORROWS,\n        
    FAILED_TO_GET_EXP,\n        FAILED_TO_MUL_UTILIZATION_RATE,\n        FAILED_TO_ADD_BASE_RATE\n    }\n\n    /*\n     * @dev Calculates the 
    utilization rate (borrows / (cash + borrows)) as an Exp\n     */\n    function getUtilizationRate(uint cash, uint borrows) pure internal returns 
    (IRError, Exp memory) {\n        if (borrows == 0) {\n            // Utilization rate is zero when there\u0027s no borrows\n            return 
    (IRError.NO_ERROR, Exp({mantissa: 0}));\n        }\n\n        (MathError err0, uint cashPlusBorrows) = addUInt(cash, borrows);\n        if (err0 != 
    MathError.NO_ERROR) {\n            return (IRError.FAILED_TO_ADD_CASH_PLUS_BORROWS, Exp({mantissa: 0}));\n        }\n\n        (MathError err1, Exp 
    memory utilizationRate) = getExp(borrows, cashPlusBorrows);\n        if (err1 != MathError.NO_ERROR) {\n            return (IRError
    .FAILED_TO_GET_EXP, Exp({mantissa: 0}));\n        }\n\n        return (IRError.NO_ERROR, utilizationRate);\n    }\n\n    /*\n     * @dev Calculates 
    the utilization and borrow rates for use by getBorrowRate function\n     */\n    function getUtilizationAndAnnualBorrowRate(uint cash, uint borrows
    ) view internal returns (IRError, Exp memory, Exp memory) {\n        (IRError err0, Exp memory utilizationRate) = getUtilizationRate(cash, borrows
    );\n        if (err0 != IRError.NO_ERROR) {\n            return (err0, Exp({mantissa: 0}), Exp({mantissa: 0}));\n        }\n\n        // Borrow 
    Rate is 5% + UtilizationRate * 45% (baseRate + UtilizationRate * multiplier);\n        // 45% of utilizationRate, is `rate * 45 / 100`\n        
    (MathError err1, Exp memory utilizationRateMuled) = mulScalar(utilizationRate, multiplier);\n        // `mulScalar` only overflows when the product 
    is \u003e= 2^256.\n        // utilizationRate is a real number on the interval [0,1], which means that\n        // utilizationRate.mantissa is in 
    the interval [0e18,1e18], which means that 45 times\n        // that is in the interval [0e18,45e18]. That interval has no intersection with 2^256, 
    and therefore\n        // this can never overflow for the standard rates.\n        if (err1 != MathError.NO_ERROR) {\n            return (IRError
    .FAILED_TO_MUL_UTILIZATION_RATE, Exp({mantissa: 0}), Exp({mantissa: 0}));\n        }\n\n        (MathError err2, Exp memory utilizationRateScaled) 
    = divScalar(utilizationRateMuled, mantissaOne);\n        // 100 is a constant, and therefore cannot be zero, which is the only error case of 
    divScalar.\n        assert(err2 == MathError.NO_ERROR);\n\n        // Add the 5% for (5% + 45% * Ua)\n        (MathError err3, Exp memory 
    annualBorrowRate) = addExp(utilizationRateScaled, Exp({mantissa: baseRate}));\n        // `addExp` only fails when the addition of mantissas 
    overflow.\n        // As per above, utilizationRateMuled is capped at 45e18,\n        // and utilizationRateScaled is capped at 4.5e17. 
    mantissaFivePercent = 0.5e17, and thus the addition\n        // is capped at 5e17, which is less than 2^256. This only applies to the standard 
    rates\n        if (err3 != MathError.NO_ERROR) {\n            return (IRError.FAILED_TO_ADD_BASE_RATE, Exp({mantissa: 0}), Exp({mantissa: 0}));\n  
          }\n\n        return (IRError.NO_ERROR, utilizationRate, annualBorrowRate);\n    }\n\n    /**\n      * @notice Gets the current borrow 
    interest rate based on the given asset, total cash, total borrows\n      *         and total reserves.\n      * @dev The return value should be 
    scaled by 1e18, thus a return value of\n      *      `(true, 1000000000000)` implies an interest rate of 0.000001 or 0.0001% *per block*.\n      * 
    @param cash The total cash of the underlying asset in the CToken\n      * @param borrows The total borrows of the underlying asset in the CToken\n 
         * @param _reserves The total reserves of the underlying asset in the CToken\n      * @return Success or failure and the borrow interest rate 
    per block scaled by 10e18\n      */\n    function getBorrowRate(uint cash, uint borrows, uint _reserves) public view returns (uint, uint) {\n      
      _reserves; // pragma ignore unused argument\n\n        (IRError err0, Exp memory _utilizationRate, Exp memory annualBorrowRate) = 
    getUtilizationAndAnnualBorrowRate(cash, borrows);\n        if (err0 != IRError.NO_ERROR) {\n            return (uint(err0), 0);\n        }\n\n     
       // And then divide down by blocks per year.\n        (MathError err1, Exp memory borrowRate) = divScalar(annualBorrowRate, blocksPerYear); // 
    basis points * blocks per year\n        // divScalar only fails when divisor is zero. This is clearly not the case.\n        assert(err1 == 
    MathError.NO_ERROR);\n\n        _utilizationRate; // pragma ignore unused variable\n\n        // Note: mantissa is the rate scaled 1e18, which 
    matches the expected result\n        return (uint(IRError.NO_ERROR), borrowRate.mantissa);\n    }\n}\n"}}
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