1
{"ComptrollerInterface.sol":{"content":"pragma solidity ^0.5.16;\n\ncontract ComptrollerInterface {\n    /// @notice Indicator that this is a 
    Comptroller contract (for inspection)\n    bool public constant isComptroller = true;\n\n    /*** Assets You Are In ***/\n\n    function 
    enterMarkets(address[] calldata sTokens) external returns (uint[] memory);\n    function exitMarket(address sToken) external returns (uint);\n\n   
     /*** Policy Hooks ***/\n\n    function mintAllowed(address sToken, address minter, uint mintAmount) external returns (uint);\n    function 
    mintVerify(address sToken, address minter, uint mintAmount, uint mintTokens) external;\n\n    function redeemAllowed(address sToken, address 
    redeemer, uint redeemTokens) external returns (uint);\n    function redeemVerify(address sToken, address redeemer, uint redeemAmount, uint 
    redeemTokens) external;\n\n    function borrowAllowed(address sToken, address borrower, uint borrowAmount) external returns (uint);\n    function 
    borrowVerify(address sToken, address borrower, uint borrowAmount) external;\n\n    function repayBorrowAllowed(\n        address sToken,\n        
    address payer,\n        address borrower,\n        uint repayAmount) external returns (uint);\n    function repayBorrowVerify(\n        address 
    sToken,\n        address payer,\n        address borrower,\n        uint repayAmount,\n        uint borrowerIndex) external;\n\n    function 
    liquidateBorrowAllowed(\n        address sTokenBorrowed,\n        address sTokenCollateral,\n        address liquidator,\n        address borrower
    ,\n        uint repayAmount) external returns (uint);\n    function liquidateBorrowVerify(\n        address sTokenBorrowed,\n        address 
    sTokenCollateral,\n        address liquidator,\n        address borrower,\n        uint repayAmount,\n        uint seizeTokens) external;\n\n    
    function seizeAllowed(\n        address sTokenCollateral,\n        address sTokenBorrowed,\n        address liquidator,\n        address borrower
    ,\n        uint seizeTokens) external returns (uint);\n    function seizeVerify(\n        address sTokenCollateral,\n        address sTokenBorrowed
    ,\n        address liquidator,\n        address borrower,\n        uint seizeTokens) external;\n\n    function transferAllowed(address sToken, 
    address src, address dst, uint transferTokens) external returns (uint);\n    function transferVerify(address sToken, address src, address dst, uint 
    transferTokens) external;\n\n    /*** Liquidity/Liquidation Calculations ***/\n\n    function liquidateCalculateSeizeTokens(\n        address 
    sTokenBorrowed,\n        address sTokenCollateral,\n        uint repayAmount) external view returns (uint, uint);\n}\n"},"InterestRateModel.sol"
    :{"content":"pragma solidity ^0.5.16;\n\n/**\n  * @title Strike\u0027s InterestRateModel Interface\n  * @author Strike\n  */\ncontract 
    InterestRateModel {\n    /// @notice Indicator that this is an InterestRateModel contract (for inspection)\n    bool public constant 
    isInterestRateModel = true;\n\n    /**\n      * @notice Calculates the current borrow interest rate per block\n      * @param cash The total amount 
    of cash the market has\n      * @param borrows The total amount of borrows the market has outstanding\n      * @param reserves The total amount of 
    reserves the market has\n      * @return The borrow rate per block (as a percentage, and scaled by 1e18)\n      */\n    function getBorrowRate(uint 
    cash, uint borrows, uint reserves) external view returns (uint);\n\n    /**\n      * @notice Calculates the current supply interest rate per 
    block\n      * @param cash The total amount of cash the market has\n      * @param borrows The total amount of borrows the market has outstanding\n 
         * @param reserves The total amount of reserves the market has\n      * @param reserveFactorMantissa The current reserve factor the market 
    has\n      * @return The supply rate per block (as a percentage, and scaled by 1e18)\n      */\n    function getSupplyRate(uint cash, uint borrows, 
    uint reserves, uint reserveFactorMantissa) external view returns (uint);\n\n}\n"},"SErc20Delegator.sol":{"content":"pragma solidity ^0.5.16
    ;\n\nimport \"./STokenInterfaces.sol\";\n\n/**\n * @title Strike\u0027s SErc20Delegator Contract\n * @notice STokens which wrap an EIP-20 
    underlying and delegate to an implementation\n * @author Strike\n */\ncontract SErc20Delegator is STokenInterface, SErc20Interface, 
    SDelegatorInterface {\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     * @param admin_ Address of the administrator of this 
    token\n     * @param implementation_ The address of the implementation the contract delegates to\n     * @param becomeImplementationData The 
    encoded args for becomeImplementation\n     */\n    constructor(address underlying_,\n                ComptrollerInterface comptroller_,\n         
           InterestRateModel interestRateModel_,\n                uint initialExchangeRateMantissa_,\n                string memory name_,\n           
         string memory symbol_,\n                uint8 decimals_,\n                address payable admin_,\n                address implementation_,\n 
                   bytes memory becomeImplementationData) public {\n        // Creator of the contract is admin during initialization\n        admin = 
    msg.sender;\n\n        // First delegate gets to initialize the delegator (i.e. storage contract)\n        delegateTo(implementation_, abi
    .encodeWithSignature(\"initialize(address,address,address,uint256,string,string,uint8)\",\n                                                        
        underlying_,\n                                                            comptroller_,\n                                                      
          interestRateModel_,\n                                                            initialExchangeRateMantissa_,\n                             
                                   name_,\n                                                            symbol_,\n                                      
                          decimals_));\n\n        // New implementations always get set via the settor (post-initialize)\n        _setImplementation
    (implementation_, false, becomeImplementationData);\n\n        // Set the proper admin now that initialization is done\n        admin = admin_;\n  
      }\n\n    /**\n     * @notice Called by the admin to update the implementation of the delegator\n     * @param implementation_ The address of the 
    new implementation for delegation\n     * @param allowResign Flag to indicate whether to call _resignImplementation on the old implementation\n    
     * @param becomeImplementationData The encoded bytes data to be passed to _becomeImplementation\n     */\n    function _setImplementation(address 
    implementation_, bool allowResign, bytes memory becomeImplementationData) public {\n        require(msg.sender == admin, \"SErc20Delegator
    ::_setImplementation: Caller must be admin\");\n\n        if (allowResign) {\n            delegateToImplementation(abi.encodeWithSignature
    (\"_resignImplementation()\"));\n        }\n\n        address oldImplementation = implementation;\n        implementation = implementation_;\n\n   
         delegateToImplementation(abi.encodeWithSignature(\"_becomeImplementation(bytes)\", becomeImplementationData));\n\n        emit 
    NewImplementation(oldImplementation, implementation);\n    }\n\n    /**\n     * @notice Sender supplies assets into the market and receives sTokens 
    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        mintAmount; // Shh\n        delegateAndReturn();\n    }\n\n    /**\n     * @notice Sender redeems 
    sTokens in exchange for the underlying asset\n     * @dev Accrues interest whether or not the operation succeeds, unless reverted\n     * @param 
    redeemTokens The number of sTokens 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        redeemTokens; // Shh\n        delegateAndReturn();\n    }\n\n 
       /**\n     * @notice Sender redeems sTokens 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        
    redeemAmount; // Shh\n        delegateAndReturn();\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        borrowAmount; // Shh\n        
    delegateAndReturn();\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        repayAmount; // Shh\n        delegateAndReturn();\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        borrower; repayAmount; // Shh\n        delegateAndReturn();\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 
    sToken to be liquidated\n     * @param sTokenCollateral 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, STokenInterface sTokenCollateral) external returns (uint) {\n        borrower; 
    repayAmount; sTokenCollateral; // Shh\n        delegateAndReturn();\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, uint amount) external returns (bool) {\n        dst; amount; // Shh\n      
      delegateAndReturn();\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 returns (bool) {\n        src; 
    dst; amount; // Shh\n        delegateAndReturn();\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        spender; amount; // Shh\n        delegateAndReturn();\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 (uint) {\n        owner; spender; // Shh\n        delegateToViewAndReturn
    ();\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 (uint) {\n        owner; // Shh\n      
      delegateToViewAndReturn();\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        owner; // Shh\n        delegateAndReturn();\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        
    account; // Shh\n        delegateToViewAndReturn();\n    }\n\n    /**\n     * @notice Returns the current per-block borrow interest rate for this 
    sToken\n     * @return The borrow interest rate per block, scaled by 1e18\n     */\n    function borrowRatePerBlock() external view returns (uint) 
    {\n        delegateToViewAndReturn();\n    }\n\n    /**\n     * @notice Returns the current per-block supply interest rate for this sToken\n     * 
    @return The supply interest rate per block, scaled by 1e18\n     */\n    function supplyRatePerBlock() external view returns (uint) {\n        
    delegateToViewAndReturn();\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 returns (uint) {\n        delegateAndReturn();\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 returns (uint) {\n        account; // Shh\n        delegateAndReturn();\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        account; // Shh\n 
           delegateToViewAndReturn();\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 returns (uint) {\n        delegateAndReturn();\n    
    }\n\n    /**\n     * @notice Calculates the exchange rate from the underlying to the SToken\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        delegateToViewAndReturn();\n    }\n\n    /**\n     * @notice Get cash balance of this sToken in the underlying 
    asset\n     * @return The quantity of underlying asset owned by this contract\n     */\n    function getCash() external view returns (uint) {\n    
        delegateToViewAndReturn();\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        delegateAndReturn();\n    }\n\n    /**\n     * @notice Transfers collateral 
    tokens (this market) to the liquidator.\n     * @dev Will fail unless called by another sToken during the process of liquidation.\n     *  Its 
    absolutely critical to use msg.sender as the borrowed sToken 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 sTokens 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 returns (uint) {\n        liquidator; borrower; seizeTokens; // Shh\n        delegateAndReturn();\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    function 
    _setPendingAdmin(address payable newPendingAdmin) external returns (uint) {\n        newPendingAdmin; // Shh\n        delegateAndReturn();\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        newComptroller; // Shh\n        delegateAndReturn();\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 returns (uint) {\n        newReserveFactorMantissa; // Shh\n        delegateAndReturn();\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        delegateAndReturn();\n    }\n\n    /**\n     * @notice Accrues interest and adds reserves by transferring from 
    admin\n     * @param addAmount Amount of reserves to add\n     * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)\n 
        */\n    function _addReserves(uint addAmount) external returns (uint) {\n        addAmount; // Shh\n        delegateAndReturn();\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 returns (uint) {\n        reduceAmount; // Shh\n        delegateAndReturn();\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        
    newInterestRateModel; // Shh\n        delegateAndReturn();\n    }\n\n    /**\n     * @notice Internal method to delegate execution to another 
    contract\n     * @dev It returns to the external caller whatever the implementation returns or forwards reverts\n     * @param callee The contract 
    to delegatecall\n     * @param data The raw data to delegatecall\n     * @return The returned bytes from the delegatecall\n     */\n    function 
    delegateTo(address callee, bytes memory data) internal returns (bytes memory) {\n        (bool success, bytes memory returnData) = callee
    .delegatecall(data);\n        assembly {\n            if eq(success, 0) {\n                revert(add(returnData, 0x20), returndatasize)\n         
       }\n        }\n        return returnData;\n    }\n\n    /**\n     * @notice Delegates execution to the implementation contract\n     * @dev It 
    returns to the external caller whatever the implementation returns or forwards reverts\n     * @param data The raw data to delegatecall\n     * 
    @return The returned bytes from the delegatecall\n     */\n    function delegateToImplementation(bytes memory data) public returns (bytes memory) 
    {\n        return delegateTo(implementation, data);\n    }\n\n    /**\n     * @notice Delegates execution to an implementation contract\n     * 
    @dev It returns to the external caller whatever the implementation returns or forwards reverts\n     *  There are an additional 2 prefix uints from 
    the wrapper returndata, which we ignore since we make an extra hop.\n     * @param data The raw data to delegatecall\n     * @return The returned 
    bytes from the delegatecall\n     */\n    function delegateToViewImplementation(bytes memory data) public view returns (bytes memory) {\n        
    (bool success, bytes memory returnData) = address(this).staticcall(abi.encodeWithSignature(\"delegateToImplementation(bytes)\", data));\n        
    assembly {\n            if eq(success, 0) {\n                revert(add(returnData, 0x20), returndatasize)\n            }\n        }\n        
    return abi.decode(returnData, (bytes));\n    }\n\n    function delegateToViewAndReturn() private view returns (bytes memory) {\n        (bool 
    success, ) = address(this).staticcall(abi.encodeWithSignature(\"delegateToImplementation(bytes)\", msg.data));\n\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(add(free_mem_ptr, 0x40), returndatasize) }\n        }\n    }\n\n    function 
    delegateAndReturn() private returns (bytes memory) {\n        (bool success, ) = implementation.delegatecall(msg.data);\n\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    /**\n     * 
    @notice Delegates execution to an implementation contract\n     * @dev It returns to the external caller whatever the implementation returns or 
    forwards reverts\n     */\n    function () external payable {\n        require(msg.value == 0,\"SErc20Delegator:fallback: cannot send value to 
    fallback\");\n\n        // delegate all other functions to current implementation\n        delegateAndReturn();\n    }\n}\n"},"STokenInterfaces
    .sol":{"content":"pragma solidity ^0.5.16;\n\nimport \"./ComptrollerInterface.sol\";\nimport \"./InterestRateModel.sol\";\n\ncontract STokenStorage 
    {\n    /**\n     * @dev Guard variable for re-entrancy checks\n     */\n    bool internal _notEntered;\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    uint8 public decimals;\n\n    /**\n     * @notice Maximum borrow 
    rate that can ever be applied (.0005% / block)\n     */\n\n    uint internal constant borrowRateMaxMantissa = 0.0005e16;\n\n    /**\n     * @notice 
    Maximum fraction of interest that can be set aside for reserves\n     */\n    uint internal 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-sToken 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 STokens (used when 
    totalSupply = 0)\n     */\n    uint internal 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 the total earned interest rate 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    uint public totalSupply;\n\n    /**\n     * @notice 
    Official record of token balances for each account\n     */\n    mapping (address =\u003e uint) internal accountTokens;\n\n    /**\n     * @notice 
    Approved token transfer amounts on behalf of others\n     */\n    mapping (address =\u003e mapping (address =\u003e uint)) internal 
    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) internal accountBorrows
    ;\n}\n\ncontract STokenInterface is STokenStorage {\n    /**\n     * @notice Indicator that this is a SToken contract (for inspection)\n     */\n  
      bool public constant isSToken = true;\n\n\n    /*** Market Events ***/\n\n    /**\n     * @notice Event emitted when interest is accrued\n     
    */\n    event AccrueInterest(uint cashPrior, 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 sTokenCollateral, 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 added\n     */\n    event ReservesAdded(address benefactor, uint addAmount, uint 
    newTotalReserves);\n\n    /**\n     * @notice Event emitted when the reserves are reduced\n     */\n    event ReservesReduced(address admin, uint 
    reduceAmount, uint newTotalReserves);\n\n    /**\n     * @notice EIP20 Transfer event\n     */\n    event Transfer(address indexed from, address 
    indexed to, uint amount);\n\n    /**\n     * @notice EIP20 Approval event\n     */\n    event Approval(address indexed owner, address indexed 
    spender, uint amount);\n\n    /**\n     * @notice Failure event\n     */\n    event Failure(uint error, uint info, uint detail);\n\n\n    /*** User 
    Interface ***/\n\n    function transfer(address dst, uint amount) external returns (bool);\n    function transferFrom(address src, address dst, 
    uint amount) external returns (bool);\n    function approve(address spender, uint amount) external returns (bool);\n    function allowance(address 
    owner, address spender) external view returns (uint);\n    function balanceOf(address owner) external view returns (uint);\n    function 
    balanceOfUnderlying(address owner) external returns (uint);\n    function getAccountSnapshot(address account) external view returns (uint, uint, 
    uint, uint);\n    function borrowRatePerBlock() external view returns (uint);\n    function supplyRatePerBlock() external view returns (uint);\n   
     function totalBorrowsCurrent() external returns (uint);\n    function borrowBalanceCurrent(address account) external returns (uint);\n    function 
    borrowBalanceStored(address account) public view returns (uint);\n    function exchangeRateCurrent() public returns (uint);\n    function 
    exchangeRateStored() public view returns (uint);\n    function getCash() external view returns (uint);\n    function accrueInterest() public 
    returns (uint);\n    function seize(address liquidator, address borrower, uint seizeTokens) external returns (uint);\n\n\n    /*** Admin Functions 
    ***/\n\n    function _setPendingAdmin(address payable newPendingAdmin) external returns (uint);\n    function _acceptAdmin() external returns (uint
    );\n    function _setComptroller(ComptrollerInterface newComptroller) public returns (uint);\n    function _setReserveFactor(uint 
    newReserveFactorMantissa) external returns (uint);\n    function _reduceReserves(uint reduceAmount) external returns (uint);\n    function 
    _setInterestRateModel(InterestRateModel newInterestRateModel) public returns (uint);\n}\n\ncontract SErc20Storage {\n    /**\n     * @notice 
    Underlying asset for this SToken\n     */\n    address public underlying;\n}\n\ncontract SErc20Interface is SErc20Storage {\n\n    /*** User 
    Interface ***/\n\n    function mint(uint mintAmount) external returns (uint);\n    function redeem(uint redeemTokens) external returns (uint);\n   
     function redeemUnderlying(uint redeemAmount) external returns (uint);\n    function borrow(uint borrowAmount) external returns (uint);\n    
    function repayBorrow(uint repayAmount) external returns (uint);\n    function repayBorrowBehalf(address borrower, uint repayAmount) external 
    returns (uint);\n    function liquidateBorrow(address borrower, uint repayAmount, STokenInterface sTokenCollateral) external returns (uint);\n\n\n 
       /*** Admin Functions ***/\n\n    function _addReserves(uint addAmount) external returns (uint);\n}\n\ncontract SDelegationStorage {\n    /**\n  
       * @notice Implementation address for this contract\n     */\n    address public implementation;\n}\n\ncontract SDelegatorInterface is 
    SDelegationStorage {\n    /**\n     * @notice Emitted when implementation is changed\n     */\n    event NewImplementation(address 
    oldImplementation, address newImplementation);\n\n    /**\n     * @notice Called by the admin to update the implementation of the delegator\n     * 
    @param implementation_ The address of the new implementation for delegation\n     * @param allowResign Flag to indicate whether to call 
    _resignImplementation on the old implementation\n     * @param becomeImplementationData The encoded bytes data to be passed to 
    _becomeImplementation\n     */\n    function _setImplementation(address implementation_, bool allowResign, bytes memory becomeImplementationData) 
    public;\n}\n\ncontract SDelegateInterface is SDelegationStorage {\n    /**\n     * @notice Called by the delegator on a delegate to initialize it 
    for duty\n     * @dev Should revert if any issues arise which make it unfit for delegation\n     * @param data The encoded bytes data for any 
    initialization\n     */\n    function _becomeImplementation(bytes memory data) public;\n\n    /**\n     * @notice Called by the delegator on a 
    delegate to forfeit its responsibility\n     */\n    function _resignImplementation() public;\n}\n"}}
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1
{"CarefulMath.sol":{"content":"pragma solidity ^0.5.16;\n\n/**\n  * @title Careful Math\n  * @author Strike\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}"},"ComptrollerInterface.sol":{"content":"pragma solidity ^0.5.16;\n\ncontract ComptrollerInterface {\n    /// @notice Indicator that this is a 
    Comptroller contract (for inspection)\n    bool public constant isComptroller = true;\n\n    /*** Assets You Are In ***/\n\n    function 
    enterMarkets(address[] calldata sTokens) external returns (uint[] memory);\n    function exitMarket(address sToken) external returns (uint);\n\n   
     /*** Policy Hooks ***/\n\n    function mintAllowed(address sToken, address minter, uint mintAmount) external returns (uint);\n    function 
    mintVerify(address sToken, address minter, uint mintAmount, uint mintTokens) external;\n\n    function redeemAllowed(address sToken, address 
    redeemer, uint redeemTokens) external returns (uint);\n    function redeemVerify(address sToken, address redeemer, uint redeemAmount, uint 
    redeemTokens) external;\n\n    function borrowAllowed(address sToken, address borrower, uint borrowAmount) external returns (uint);\n    function 
    borrowVerify(address sToken, address borrower, uint borrowAmount) external;\n\n    function repayBorrowAllowed(\n        address sToken,\n        
    address payer,\n        address borrower,\n        uint repayAmount) external returns (uint);\n    function repayBorrowVerify(\n        address 
    sToken,\n        address payer,\n        address borrower,\n        uint repayAmount,\n        uint borrowerIndex) external;\n\n    function 
    liquidateBorrowAllowed(\n        address sTokenBorrowed,\n        address sTokenCollateral,\n        address liquidator,\n        address borrower
    ,\n        uint repayAmount) external returns (uint);\n    function liquidateBorrowVerify(\n        address sTokenBorrowed,\n        address 
    sTokenCollateral,\n        address liquidator,\n        address borrower,\n        uint repayAmount,\n        uint seizeTokens) external;\n\n    
    function seizeAllowed(\n        address sTokenCollateral,\n        address sTokenBorrowed,\n        address liquidator,\n        address borrower
    ,\n        uint seizeTokens) external returns (uint);\n    function seizeVerify(\n        address sTokenCollateral,\n        address sTokenBorrowed
    ,\n        address liquidator,\n        address borrower,\n        uint seizeTokens) external;\n\n    function transferAllowed(address sToken, 
    address src, address dst, uint transferTokens) external returns (uint);\n    function transferVerify(address sToken, address src, address dst, uint 
    transferTokens) external;\n\n    /*** Liquidity/Liquidation Calculations ***/\n\n    function liquidateCalculateSeizeTokens(\n        address 
    sTokenBorrowed,\n        address sTokenCollateral,\n        uint repayAmount) external view returns (uint, uint);\n}\n"},"ComptrollerStorage.sol"
    :{"content":"pragma solidity ^0.5.16;\n\nimport \"./SToken.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 SToken[]) public accountAssets;\n\n}\n\ncontract ComptrollerV2Storage is ComptrollerV1Storage {\n  
      struct Market {\n        /// @notice Whether or not this market is listed\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        /// @notice 
    Per-market mapping of \"accounts in this asset\"\n        mapping(address =\u003e bool) accountMembership;\n\n        /// @notice Whether or not 
    this market receives STRK\n        bool isStriked;\n    }\n\n    /**\n     * @notice Official mapping of sTokens -\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    /**\n     * @notice The 
    Pause Guardian can pause certain actions as a safety mechanism.\n     *  Actions which allow users to remove their own assets cannot be paused.\n  
       *  Liquidation / seizing / transfer can only be paused globally, not by market.\n     */\n    address public pauseGuardian;\n    bool public 
    _mintGuardianPaused;\n    bool public _borrowGuardianPaused;\n    bool public transferGuardianPaused;\n    bool public seizeGuardianPaused;\n    
    mapping(address =\u003e bool) public mintGuardianPaused;\n    mapping(address =\u003e bool) public borrowGuardianPaused;\n}\n\ncontract 
    ComptrollerV3Storage is ComptrollerV2Storage {\n    struct StrikeMarketState {\n        /// @notice The market\u0027s last updated 
    strikeBorrowIndex or strikeSupplyIndex\n        uint224 index;\n\n        /// @notice The block number the index was last updated at\n        
    uint32 block;\n    }\n\n    /// @notice A list of all markets\n    SToken[] public allMarkets;\n\n    /// @notice The rate at which the flywheel 
    distributes STRK, per block\n    uint public strikeRate;\n\n    /// @notice The portion of strikeRate that each market currently receives\n    
    mapping(address =\u003e uint) public strikeSpeeds;\n\n    /// @notice The STRK market supply state for each market\n    mapping(address =\u003e 
    StrikeMarketState) public strikeSupplyState;\n\n    /// @notice The STRK market borrow state for each market\n    mapping(address =\u003e 
    StrikeMarketState) public strikeBorrowState;\n\n    /// @notice The STRK borrow index for each market for each supplier as of the last time they 
    accrued STRK\n    mapping(address =\u003e mapping(address =\u003e uint)) public strikeSupplierIndex;\n\n    /// @notice The STRK borrow index for 
    each market for each borrower as of the last time they accrued STRK\n    mapping(address =\u003e mapping(address =\u003e uint)) public 
    strikeBorrowerIndex;\n\n    /// @notice The STRK accrued but not yet transferred to each user\n    mapping(address =\u003e uint) public 
    strikeAccrued;\n}\n\ncontract ComptrollerV4Storage is ComptrollerV3Storage {\n    // @notice The borrowCapGuardian can set borrowCaps to any number 
    for any market. Lowering the borrow cap could disable borrowing on the given market.\n    address public borrowCapGuardian;\n\n    // @notice 
    Borrow caps enforced by borrowAllowed for each sToken address. Defaults to zero which corresponds to unlimited borrowing.\n    mapping(address 
    =\u003e uint) public borrowCaps;\n}\n"},"EIP20Interface.sol":{"content":"pragma solidity ^0.5.16;\n\n/**\n * @title ERC 20 Token Standard 
    Interface\n *  https://eips.ethereum.org/EIPS/eip-20\n */\ninterface EIP20Interface {\n    function name() external view returns (string memory);\n 
       function symbol() external view returns (string memory);\n    function decimals() external view returns (uint8);\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 ^0.5.16;\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 ^0.5.16
    ;\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, // no longer possible\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        SET_PAUSE_GUARDIAN_OWNER_CHECK\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        
    ADD_RESERVES_ACCRUE_INTEREST_FAILED,\n        ADD_RESERVES_FRESH_CHECK,\n        ADD_RESERVES_TRANSFER_IN_NOT_POSSIBLE\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}"},"Exponential.sol":{"content":"pragma solidity ^0.5.16;\n\nimport \"./CarefulMath.sol\";\n\n/**\n * @title Exponential module for storing 
    fixed-precision decimals\n * @author Strike\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 doubleScale = 1e36;\n    uint constant halfExpScale = expScale
    /2;\n    uint constant mantissaOne = expScale;\n\n    struct Exp {\n        uint mantissa;\n    }\n\n    struct Double {\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) internal pure 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) internal 
    pure 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) internal pure 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) internal pure 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) internal pure 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) internal 
    pure 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) internal pure 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) internal pure 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) internal pure 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) internal pure 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) internal pure 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) internal pure 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) internal pure 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) internal pure 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) internal pure 
    returns (bool) {\n        return left.mantissa \u003c right.mantissa;\n    }\n\n    /**\n     * @dev Checks if left Exp \u003c= right Exp.\n     
    */\n    function lessThanOrEqualExp(Exp memory left, Exp memory right) internal pure returns (bool) {\n        return left.mantissa \u003c= right
    .mantissa;\n    }\n\n    /**\n     * @dev Checks if left Exp \u003e right Exp.\n     */\n    function greaterThanExp(Exp memory left, Exp memory 
    right) internal pure returns (bool) {\n        return left.mantissa \u003e right.mantissa;\n    }\n\n    /**\n     * @dev returns true if Exp is 
    exactly zero\n     */\n    function isZeroExp(Exp memory value) internal pure returns (bool) {\n        return value.mantissa == 0;\n    }\n\n    
    function safe224(uint n, string memory errorMessage) internal pure returns (uint224) {\n        require(n \u003c 2**224, errorMessage);\n        
    return uint224(n);\n    }\n\n    function safe32(uint n, string memory errorMessage) internal pure returns (uint32) {\n        require(n \u003c 2
    **32, errorMessage);\n        return uint32(n);\n    }\n\n    function add_(Exp memory a, Exp memory b) internal pure returns (Exp memory) {\n     
       return Exp({mantissa: add_(a.mantissa, b.mantissa)});\n    }\n\n    function add_(Double memory a, Double memory b) internal pure returns 
    (Double memory) {\n        return Double({mantissa: add_(a.mantissa, b.mantissa)});\n    }\n\n    function add_(uint a, uint b) internal pure 
    returns (uint) {\n        return add_(a, b, \"addition overflow\");\n    }\n\n    function add_(uint a, uint b, string memory errorMessage) 
    internal pure returns (uint) {\n        uint c = a + b;\n        require(c \u003e= a, errorMessage);\n        return c;\n    }\n\n    function sub_
    (Exp memory a, Exp memory b) internal pure returns (Exp memory) {\n        return Exp({mantissa: sub_(a.mantissa, b.mantissa)});\n    }\n\n    
    function sub_(Double memory a, Double memory b) internal pure returns (Double memory) {\n        return Double({mantissa: sub_(a.mantissa, b
    .mantissa)});\n    }\n\n    function sub_(uint a, uint b) internal pure returns (uint) {\n        return sub_(a, b, \"subtraction underflow\");\n  
      }\n\n    function sub_(uint a, uint b, string memory errorMessage) internal pure returns (uint) {\n        require(b \u003c= a, errorMessage);\n 
           return a - b;\n    }\n\n    function mul_(Exp memory a, Exp memory b) internal pure returns (Exp memory) {\n        return Exp({mantissa: 
    mul_(a.mantissa, b.mantissa) / expScale});\n    }\n\n    function mul_(Exp memory a, uint b) internal pure returns (Exp memory) {\n        return 
    Exp({mantissa: mul_(a.mantissa, b)});\n    }\n\n    function mul_(uint a, Exp memory b) internal pure returns (uint) {\n        return mul_(a, b
    .mantissa) / expScale;\n    }\n\n    function mul_(Double memory a, Double memory b) internal pure returns (Double memory) {\n        return Double
    ({mantissa: mul_(a.mantissa, b.mantissa) / doubleScale});\n    }\n\n    function mul_(Double memory a, uint b) internal pure returns (Double memory
    ) {\n        return Double({mantissa: mul_(a.mantissa, b)});\n    }\n\n    function mul_(uint a, Double memory b) internal pure returns (uint) {\n 
           return mul_(a, b.mantissa) / doubleScale;\n    }\n\n    function mul_(uint a, uint b) internal pure returns (uint) {\n        return mul_(a, 
    b, \"multiplication overflow\");\n    }\n\n    function mul_(uint a, uint b, string memory errorMessage) internal pure returns (uint) {\n        if 
    (a == 0 || b == 0) {\n            return 0;\n        }\n        uint c = a * b;\n        require(c / a == b, errorMessage);\n        return c;\n   
     }\n\n    function div_(Exp memory a, Exp memory b) internal pure returns (Exp memory) {\n        return Exp({mantissa: div_(mul_(a.mantissa, 
    expScale), b.mantissa)});\n    }\n\n    function div_(Exp memory a, uint b) internal pure returns (Exp memory) {\n        return Exp({mantissa: 
    div_(a.mantissa, b)});\n    }\n\n    function div_(uint a, Exp memory b) internal pure returns (uint) {\n        return div_(mul_(a, expScale), b
    .mantissa);\n    }\n\n    function div_(Double memory a, Double memory b) internal pure returns (Double memory) {\n        return Double({mantissa: 
    div_(mul_(a.mantissa, doubleScale), b.mantissa)});\n    }\n\n    function div_(Double memory a, uint b) internal pure returns (Double memory) {\n  
          return Double({mantissa: div_(a.mantissa, b)});\n    }\n\n    function div_(uint a, Double memory b) internal pure returns (uint) {\n        
    return div_(mul_(a, doubleScale), b.mantissa);\n    }\n\n    function div_(uint a, uint b) internal pure returns (uint) {\n        return div_(a, b
    , \"divide by zero\");\n    }\n\n    function div_(uint a, uint b, string memory errorMessage) internal pure returns (uint) {\n        require(b 
    \u003e 0, errorMessage);\n        return a / b;\n    }\n\n    function fraction(uint a, uint b) internal pure returns (Double memory) {\n        
    return Double({mantissa: div_(mul_(a, doubleScale), b)});\n    }\n}\n"},"InterestRateModel.sol":{"content":"pragma solidity ^0.5.16;\n\n/**\n  * 
    @title Strike\u0027s InterestRateModel Interface\n  * @author Strike\n  */\ncontract InterestRateModel {\n    /// @notice Indicator that this is an 
    InterestRateModel contract (for inspection)\n    bool public constant isInterestRateModel = true;\n\n    /**\n      * @notice Calculates the 
    current borrow interest rate per block\n      * @param cash The total amount of cash the market has\n      * @param borrows The total amount of 
    borrows the market has outstanding\n      * @param reserves The total amount of reserves the market has\n      * @return The borrow rate per block 
    (as a percentage, and scaled by 1e18)\n      */\n    function getBorrowRate(uint cash, uint borrows, uint reserves) external view returns (uint
    );\n\n    /**\n      * @notice Calculates the current supply interest rate per block\n      * @param cash The total amount of cash the market has\n 
         * @param borrows The total amount of borrows the market has outstanding\n      * @param reserves The total amount of reserves the market has\n 
         * @param reserveFactorMantissa The current reserve factor the market has\n      * @return The supply rate per block (as a percentage, and 
    scaled by 1e18)\n      */\n    function getSupplyRate(uint cash, uint borrows, uint reserves, uint reserveFactorMantissa) external view returns 
    (uint);\n\n}\n"},"PriceOracle.sol":{"content":"pragma solidity ^0.5.16;\n\nimport \"./SToken.sol\";\n\ncontract PriceOracle {\n    /// @notice 
    Indicator that this is a PriceOracle contract (for inspection)\n    bool public constant isPriceOracle = true;\n\n    /**\n      * @notice Get the 
    underlying price of a sToken asset\n      * @param sToken The sToken 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(SToken sToken) external view 
    returns (uint);\n}\n"},"SToken.sol":{"content":"pragma solidity ^0.5.16;\n\nimport \"./ComptrollerInterface.sol\";\nimport \"./STokenInterfaces
    .sol\";\nimport \"./ErrorReporter.sol\";\nimport \"./Exponential.sol\";\nimport \"./EIP20Interface.sol\";\nimport \"./EIP20NonStandardInterface
    .sol\";\nimport \"./InterestRateModel.sol\";\n\n/**\n * @title Strike\u0027s SToken Contract\n * @notice Abstract base for STokens\n * @author 
    Strike\n */\ncontract SToken is STokenInterface, Exponential, TokenErrorReporter {\n    /**\n     * @notice Initialize the 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    function initialize(ComptrollerInterface 
    comptroller_,\n                        InterestRateModel interestRateModel_,\n                        uint initialExchangeRateMantissa_,\n         
                   string memory name_,\n                        string memory symbol_,\n                        uint8 decimals_) public {\n        
    require(msg.sender == admin, \"only admin may initialize the market\");\n        require(accrualBlockNumber == 0 \u0026\u0026 borrowIndex == 0, 
    \"market may only be initialized once\");\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        // The counter starts true to prevent changing it from 
    zero to non-zero (i.e. smaller cost/refund)\n        _notEntered = true;\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 srsTokensNew;\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, srsTokensNew) = 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] = srsTokensNew;\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        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, 
    \"balance could not be calculated\");\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 sTokenBalance = 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), sTokenBalance, 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 sToken\n     * @return The borrow interest rate per block, scaled by 1e18\n     */\n    function borrowRatePerBlock() 
    external view returns (uint) {\n        return interestRateModel.getBorrowRate(getCashPrior(), totalBorrows, totalReserves);\n    }\n\n    /**\n   
      * @notice Returns the current per-block supply interest rate for this sToken\n     * @return The supply interest rate per block, scaled by 1e18\n 
        */\n    function supplyRatePerBlock() external view returns (uint) {\n        return interestRateModel.getSupplyRate(getCashPrior(), 
    totalBorrows, totalReserves, reserveFactorMantissa);\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 SToken\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 SToken\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        uint 
    _totalSupply = totalSupply;\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 sToken 
    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    /**\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        /* Remember the initial block number */\n        uint currentBlockNumber = 
    getBlockNumber();\n        uint accrualBlockNumberPrior = accrualBlockNumber;\n\n        /* Short-circuit accumulating 0 interest */\n        if 
    (accrualBlockNumberPrior == currentBlockNumber) {\n            return uint(Error.NO_ERROR);\n        }\n\n        /* Read the previous values out 
    of storage */\n        uint cashPrior = getCashPrior();\n        uint borrowsPrior = totalBorrows;\n        uint reservesPrior = totalReserves;\n  
          uint borrowIndexPrior = borrowIndex;\n\n        /* Calculate the current borrow interest rate */\n        uint borrowRateMantissa = 
    interestRateModel.getBorrowRate(cashPrior, borrowsPrior, reservesPrior);\n        require(borrowRateMantissa \u003c= borrowRateMaxMantissa, 
    \"borrow rate is absurdly high\");\n\n        /* Calculate the number of blocks elapsed since the last accrual */\n        (MathError mathErr, uint 
    blockDelta) = subUInt(currentBlockNumber, accrualBlockNumberPrior);\n        require(mathErr == MathError.NO_ERROR, \"could not calculate block 
    delta\");\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\n        Exp memory simpleInterestFactor;\n        uint 
    interestAccumulated;\n        uint totalBorrowsNew;\n        uint totalReservesNew;\n        uint borrowIndexNew;\n\n        (mathErr, 
    simpleInterestFactor) = mulScalar(Exp({mantissa: borrowRateMantissa}), blockDelta);\n        if (mathErr != MathError.NO_ERROR) {\n            
    return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_SIMPLE_INTEREST_FACTOR_CALCULATION_FAILED, uint(mathErr));\n        }\n\n        
    (mathErr, interestAccumulated) = mulScalarTruncate(simpleInterestFactor, borrowsPrior);\n        if (mathErr != MathError.NO_ERROR) {\n            
    return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_ACCUMULATED_INTEREST_CALCULATION_FAILED, uint(mathErr));\n        }\n\n        
    (mathErr, totalBorrowsNew) = addUInt(interestAccumulated, borrowsPrior);\n        if (mathErr != MathError.NO_ERROR) {\n            return 
    failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_NEW_TOTAL_BORROWS_CALCULATION_FAILED, uint(mathErr));\n        }\n\n        (mathErr, 
    totalReservesNew) = mulScalarTruncateAddUInt(Exp({mantissa: reserveFactorMantissa}), interestAccumulated, reservesPrior);\n        if (mathErr != 
    MathError.NO_ERROR) {\n            return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_NEW_TOTAL_RESERVES_CALCULATION_FAILED, uint
    (mathErr));\n        }\n\n        (mathErr, borrowIndexNew) = mulScalarTruncateAddUInt(simpleInterestFactor, borrowIndexPrior, borrowIndexPrior);\n 
           if (mathErr != MathError.NO_ERROR) {\n            return failOpaque(Error.MATH_ERROR, FailureInfo
    .ACCRUE_INTEREST_NEW_BORROW_INDEX_CALCULATION_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        
    accrualBlockNumber = currentBlockNumber;\n        borrowIndex = borrowIndexNew;\n        totalBorrows = totalBorrowsNew;\n        totalReserves = 
    totalReservesNew;\n\n        /* We emit an AccrueInterest event */\n        emit AccrueInterest(cashPrior, interestAccumulated, borrowIndexNew, 
    totalBorrowsNew);\n\n        return uint(Error.NO_ERROR);\n    }\n\n    /**\n     * @notice Sender supplies assets into the market and receives 
    sTokens 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, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual 
    mint amount.\n     */\n    function mintInternal(uint mintAmount) internal nonReentrant returns (uint, 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), 0);\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        uint actualMintAmount;\n    }\n\n    /**\n     * @notice User supplies assets 
    into the market and receives sTokens 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, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual mint amount.\n     */\n    function 
    mintFresh(address minter, uint mintAmount) internal returns (uint, 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), 0);\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), 0);\n        }\n\n        MintLocalVars memory vars;\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)), 0);\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 sToken must handle variations between ERC-20 and ETH underlying.\n         *  `doTransferIn` reverts if anything goes wrong, since we 
    can\u0027t be sure if\n         *  side-effects occurred. The function returns the amount actually transferred,\n         *  in case of a fee. On 
    success, the sToken holds an additional `actualMintAmount`\n         *  of cash.\n         */\n        vars.actualMintAmount = doTransferIn(minter, 
    mintAmount);\n\n        /*\n         * We get the current exchange rate and calculate the number of sTokens to be minted:\n         *  mintTokens = 
    actualMintAmount / exchangeRate\n         */\n\n        (vars.mathErr, vars.mintTokens) = divScalarByExpTruncate(vars.actualMintAmount, Exp
    ({mantissa: vars.exchangeRateMantissa}));\n        require(vars.mathErr == MathError.NO_ERROR, \"MINT_EXCHANGE_CALCULATION_FAILED\");\n\n        
    /*\n         * We calculate the new total supply of sTokens 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        require(vars.mathErr == MathError.NO_ERROR, 
    \"MINT_NEW_TOTAL_SUPPLY_CALCULATION_FAILED\");\n\n        (vars.mathErr, vars.accountTokensNew) = addUInt(accountTokens[minter], vars.mintTokens
    );\n        require(vars.mathErr == MathError.NO_ERROR, \"MINT_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED\");\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, vars.actualMintAmount, vars.mintTokens);\n        emit Transfer(address
    (this), minter, vars.mintTokens);\n\n        /* We call the defense hook */\n        comptroller.mintVerify(address(this), minter, vars
    .actualMintAmount, vars.mintTokens);\n\n        return (uint(Error.NO_ERROR), vars.actualMintAmount);\n    }\n\n    /**\n     * @notice Sender 
    redeems sTokens in exchange for the underlying asset\n     * @dev Accrues interest whether or not the operation succeeds, unless reverted\n     * 
    @param redeemTokens The number of sTokens 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 sTokens 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 receive from redeeming sTokens\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 sTokens 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 
    sTokens to redeem into underlying (only one of redeemTokensIn or redeemAmountIn may be non-zero)\n     * @param redeemAmountIn The number of 
    underlying tokens to receive from redeeming sTokens (only one of redeemTokensIn or redeemAmountIn may be non-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 sToken 
    must handle variations between ERC-20 and ETH underlying.\n         *  On success, the sToken has redeemAmount less of cash.\n         *  
    doTransferOut reverts if anything goes wrong, since we can\u0027t be sure if side effects occurred.\n         */\n        doTransferOut(redeemer, 
    vars.redeemAmount);\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        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 sToken must handle variations 
    between ERC-20 and ETH underlying.\n         *  On success, the sToken borrowAmount less of cash.\n         *  doTransferOut reverts if anything 
    goes wrong, since we can\u0027t be sure if side effects occurred.\n         */\n        doTransferOut(borrower, borrowAmount);\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, uint) An error code (0=success, otherwise a failure, see 
    ErrorReporter.sol), and the actual repayment amount.\n     */\n    function repayBorrowInternal(uint repayAmount) internal nonReentrant returns 
    (uint, 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), 0);\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, 
    uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount.\n     */\n    function 
    repayBorrowBehalfInternal(address borrower, uint repayAmount) internal nonReentrant returns (uint, 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), 0);\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        uint actualRepayAmount;\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, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount.\n     */\n    function 
    repayBorrowFresh(address payer, address borrower, uint repayAmount) internal returns (uint, 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), 0);\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), 0);\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)), 0);\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        /////////////////////////\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 sToken must handle 
    variations between ERC-20 and ETH underlying.\n         *  On success, the sToken holds an additional repayAmount of cash.\n         *  
    doTransferIn reverts if anything goes wrong, since we can\u0027t be sure if side effects occurred.\n         *   it returns the amount actually 
    transferred, in case of a fee.\n         */\n        vars.actualRepayAmount = doTransferIn(payer, vars.repayAmount);\n\n        /*\n         * We 
    calculate the new borrower and total borrow balances, failing on underflow:\n         *  accountBorrowsNew = accountBorrows - actualRepayAmount\n  
           *  totalBorrowsNew = totalBorrows - actualRepayAmount\n         */\n        (vars.mathErr, vars.accountBorrowsNew) = subUInt(vars
    .accountBorrows, vars.actualRepayAmount);\n        require(vars.mathErr == MathError.NO_ERROR, 
    \"REPAY_BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED\");\n\n        (vars.mathErr, vars.totalBorrowsNew) = subUInt(totalBorrows, vars
    .actualRepayAmount);\n        require(vars.mathErr == MathError.NO_ERROR, \"REPAY_BORROW_NEW_TOTAL_BALANCE_CALCULATION_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.actualRepayAmount, vars.accountBorrowsNew, vars.totalBorrowsNew);\n\n        /* We call the defense 
    hook */\n        comptroller.repayBorrowVerify(address(this), payer, borrower, vars.actualRepayAmount, vars.borrowerIndex);\n\n        return (uint
    (Error.NO_ERROR), vars.actualRepayAmount);\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 sToken to be liquidated\n     * @param 
    sTokenCollateral 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, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount.\n    
     */\n    function liquidateBorrowInternal(address borrower, uint repayAmount, STokenInterface sTokenCollateral) internal nonReentrant returns (uint
    , 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), 0);\n        }\n\n        error = sTokenCollateral.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), 0);\n        }\n\n        // liquidateBorrowFresh emits 
    borrow-specific logs on errors, so we don\u0027t need to\n        return liquidateBorrowFresh(msg.sender, borrower, repayAmount, sTokenCollateral
    );\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 sToken to be liquidated\n     * @param liquidator The address repaying the borrow and 
    seizing collateral\n     * @param sTokenCollateral 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, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and 
    the actual repayment amount.\n     */\n    function liquidateBorrowFresh(address liquidator, address borrower, uint repayAmount, STokenInterface 
    sTokenCollateral) internal returns (uint, uint) {\n        /* Fail if liquidate not allowed */\n        uint allowed = comptroller
    .liquidateBorrowAllowed(address(this), address(sTokenCollateral), liquidator, borrower, repayAmount);\n        if (allowed != 0) {\n            
    return (failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.LIQUIDATE_COMPTROLLER_REJECTION, allowed), 0);\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), 0);\n        }\n\n        /* Verify sTokenCollateral market\u0027s block number equals 
    current block number */\n        if (sTokenCollateral.accrualBlockNumber() != getBlockNumber()) {\n            return (fail(Error.MARKET_NOT_FRESH, 
    FailureInfo.LIQUIDATE_COLLATERAL_FRESHNESS_CHECK), 0);\n        }\n\n        /* Fail if borrower = liquidator */\n        if (borrower == 
    liquidator) {\n            return (fail(Error.INVALID_ACCOUNT_PAIR, FailureInfo.LIQUIDATE_LIQUIDATOR_IS_BORROWER), 0);\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), 0);\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), 0);\n        }\n\n\n        /* Fail if 
    repayBorrow fails */\n        (uint repayBorrowError, uint actualRepayAmount) = repayBorrowFresh(liquidator, borrower, repayAmount);\n        if 
    (repayBorrowError != uint(Error.NO_ERROR)) {\n            return (fail(Error(repayBorrowError), FailureInfo.LIQUIDATE_REPAY_BORROW_FRESH_FAILED), 0
    );\n        }\n\n        /////////////////////////\n        // EFFECTS \u0026 INTERACTIONS\n        // (No safe failures beyond this point)\n\n    
        /* We calculate the number of collateral tokens that will be seized */\n        (uint amountSeizeError, uint seizeTokens) = comptroller
    .liquidateCalculateSeizeTokens(address(this), address(sTokenCollateral), actualRepayAmount);\n        require(amountSeizeError == uint(Error
    .NO_ERROR), \"LIQUIDATE_COMPTROLLER_CALCULATE_AMOUNT_SEIZE_FAILED\");\n\n        /* Revert if borrower collateral token balance \u003c seizeTokens 
    */\n        require(sTokenCollateral.balanceOf(borrower) \u003e= seizeTokens, \"LIQUIDATE_SEIZE_TOO_MUCH\");\n\n        // If this is also the 
    collateral, run seizeInternal to avoid re-entrancy, otherwise make an external call\n        uint seizeError;\n        if (address(sTokenCollateral
    ) == address(this)) {\n            seizeError = seizeInternal(address(this), liquidator, borrower, seizeTokens);\n        } else {\n            
    seizeError = sTokenCollateral.seize(liquidator, borrower, seizeTokens);\n        }\n\n        /* Revert if seize tokens fails (since we cannot be 
    sure of side effects) */\n        require(seizeError == uint(Error.NO_ERROR), \"token seizure failed\");\n\n        /* We emit a LiquidateBorrow 
    event */\n        emit LiquidateBorrow(liquidator, borrower, actualRepayAmount, address(sTokenCollateral), seizeTokens);\n\n        /* We call the 
    defense hook */\n        comptroller.liquidateBorrowVerify(address(this), address(sTokenCollateral), liquidator, borrower, actualRepayAmount, 
    seizeTokens);\n\n        return (uint(Error.NO_ERROR), actualRepayAmount);\n    }\n\n    /**\n     * @notice Transfers collateral tokens (this 
    market) to the liquidator.\n     * @dev Will fail unless called by another sToken during the process of liquidation.\n     *  Its absolutely 
    critical to use msg.sender as the borrowed sToken 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 sTokens 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        return seizeInternal(msg.sender, liquidator, borrower, seizeTokens);\n    }\n\n    /**\n     * 
    @notice Transfers collateral tokens (this market) to the liquidator.\n     * @dev Called only during an in-kind liquidation, or by liquidateBorrow 
    during the liquidation of another SToken.\n     *  Its absolutely critical to use msg.sender as the seizer sToken and not a parameter.\n     * 
    @param seizerToken The contract seizing the collateral (i.e. borrowed sToken)\n     * @param liquidator The account receiving seized collateral\n  
       * @param borrower The account having collateral seized\n     * @param seizeTokens The number of sTokens to seize\n     * @return uint 0=success, 
    otherwise a failure (see ErrorReporter.sol for details)\n     */\n    function seizeInternal(address seizerToken, address liquidator, address 
    borrower, uint seizeTokens) internal returns (uint) {\n        /* Fail if seize not allowed */\n        uint allowed = comptroller.seizeAllowed
    (address(this), seizerToken, 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), 
    seizerToken, 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    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            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 from msg.sender\n     * @param addAmount Amount of addition to reserves\n     * @return uint 0=success, otherwise a failure (see 
    ErrorReporter.sol for details)\n     */\n    function _addReservesInternal(uint addAmount) internal 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
    .ADD_RESERVES_ACCRUE_INTEREST_FAILED);\n        }\n\n        // _addReservesFresh emits reserve-addition-specific logs on errors, so we don\u0027t 
    need to.\n        (error, ) = _addReservesFresh(addAmount);\n        return error;\n    }\n\n    /**\n     * @notice Add reserves by transferring 
    from caller\n     * @dev Requires fresh interest accrual\n     * @param addAmount Amount of addition to reserves\n     * @return (uint, uint) An 
    error code (0=success, otherwise a failure (see ErrorReporter.sol for details)) and the actual amount added, net token fees\n     */\n    function 
    _addReservesFresh(uint addAmount) internal returns (uint, uint) {\n        // totalReserves + actualAddAmount\n        uint totalReservesNew;\n    
        uint actualAddAmount;\n\n        // We fail gracefully unless market\u0027s block number equals current block number\n        if 
    (accrualBlockNumber != getBlockNumber()) {\n            return (fail(Error.MARKET_NOT_FRESH, FailureInfo.ADD_RESERVES_FRESH_CHECK), actualAddAmount
    );\n        }\n\n        /////////////////////////\n        // EFFECTS \u0026 INTERACTIONS\n        // (No safe failures beyond this point)\n\n    
        /*\n         * We call doTransferIn for the caller and the addAmount\n         *  Note: The sToken must handle variations between ERC-20 and 
    ETH underlying.\n         *  On success, the sToken holds an additional addAmount of cash.\n         *  doTransferIn reverts if anything goes wrong
    , since we can\u0027t be sure if side effects occurred.\n         *  it returns the amount actually transferred, in case of a fee.\n         */\n\n 
           actualAddAmount = doTransferIn(msg.sender, addAmount);\n\n        totalReservesNew = totalReserves + actualAddAmount;\n\n        /* Revert 
    on overflow */\n        require(totalReservesNew \u003e= totalReserves, \"add reserves unexpected overflow\");\n\n        // Store reserves[n+1] = 
    reserves[n] + actualAddAmount\n        totalReserves = totalReservesNew;\n\n        /* Emit NewReserves(admin, actualAddAmount, reserves[n+1]) */\n 
           emit ReservesAdded(msg.sender, actualAddAmount, totalReservesNew);\n\n        /* Return (NO_ERROR, actualAddAmount) */\n        return (uint
    (Error.NO_ERROR), actualAddAmount);\n    }\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        // 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            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        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        // doTransferOut reverts if anything goes wrong, since we 
    can\u0027t be sure if side effects occurred.\n        doTransferOut(admin, reduceAmount);\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            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 Performs a transfer in, reverting upon failure. Returns the amount actually transferred to the protocol, in case of a 
    fee.\n     *  This may revert due to insufficient balance or insufficient allowance.\n     */\n    function doTransferIn(address from, uint amount) 
    internal returns (uint);\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;\n\n\n    /*** Reentrancy Guard ***/\n\n    /**\n     * @dev Prevents a contract from 
    calling itself, directly or indirectly.\n     */\n    modifier nonReentrant() {\n        require(_notEntered, \"re-entered\");\n        _notEntered 
    = false;\n        _;\n        _notEntered = true; // get a gas-refund post-Istanbul\n    }\n}\n"},"STokenInterfaces.sol":{"content":"pragma 
    solidity ^0.5.16;\n\nimport \"./ComptrollerInterface.sol\";\nimport \"./InterestRateModel.sol\";\n\ncontract STokenStorage {\n    /**\n     * @dev 
    Guard variable for re-entrancy checks\n     */\n    bool internal _notEntered;\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    uint8 public decimals;\n\n    /**\n     * @notice Maximum borrow rate that can ever be 
    applied (.0005% / block)\n     */\n\n    uint internal constant borrowRateMaxMantissa = 0.0005e16;\n\n    /**\n     * @notice Maximum fraction of 
    interest that can be set aside for reserves\n     */\n    uint internal 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-sToken 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 STokens (used when 
    totalSupply = 0)\n     */\n    uint internal 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 the total earned interest rate 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    uint public totalSupply;\n\n    /**\n     * @notice 
    Official record of token balances for each account\n     */\n    mapping (address =\u003e uint) internal accountTokens;\n\n    /**\n     * @notice 
    Approved token transfer amounts on behalf of others\n     */\n    mapping (address =\u003e mapping (address =\u003e uint)) internal 
    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) internal accountBorrows
    ;\n}\n\ncontract STokenInterface is STokenStorage {\n    /**\n     * @notice Indicator that this is a SToken contract (for inspection)\n     */\n  
      bool public constant isSToken = true;\n\n\n    /*** Market Events ***/\n\n    /**\n     * @notice Event emitted when interest is accrued\n     
    */\n    event AccrueInterest(uint cashPrior, 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 sTokenCollateral, 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 added\n     */\n    event ReservesAdded(address benefactor, uint addAmount, uint 
    newTotalReserves);\n\n    /**\n     * @notice Event emitted when the reserves are reduced\n     */\n    event ReservesReduced(address admin, uint 
    reduceAmount, uint newTotalReserves);\n\n    /**\n     * @notice EIP20 Transfer event\n     */\n    event Transfer(address indexed from, address 
    indexed to, uint amount);\n\n    /**\n     * @notice EIP20 Approval event\n     */\n    event Approval(address indexed owner, address indexed 
    spender, uint amount);\n\n    /**\n     * @notice Failure event\n     */\n    event Failure(uint error, uint info, uint detail);\n\n\n    /*** User 
    Interface ***/\n\n    function transfer(address dst, uint amount) external returns (bool);\n    function transferFrom(address src, address dst, 
    uint amount) external returns (bool);\n    function approve(address spender, uint amount) external returns (bool);\n    function allowance(address 
    owner, address spender) external view returns (uint);\n    function balanceOf(address owner) external view returns (uint);\n    function 
    balanceOfUnderlying(address owner) external returns (uint);\n    function getAccountSnapshot(address account) external view returns (uint, uint, 
    uint, uint);\n    function borrowRatePerBlock() external view returns (uint);\n    function supplyRatePerBlock() external view returns (uint);\n   
     function totalBorrowsCurrent() external returns (uint);\n    function borrowBalanceCurrent(address account) external returns (uint);\n    function 
    borrowBalanceStored(address account) public view returns (uint);\n    function exchangeRateCurrent() public returns (uint);\n    function 
    exchangeRateStored() public view returns (uint);\n    function getCash() external view returns (uint);\n    function accrueInterest() public 
    returns (uint);\n    function seize(address liquidator, address borrower, uint seizeTokens) external returns (uint);\n\n\n    /*** Admin Functions 
    ***/\n\n    function _setPendingAdmin(address payable newPendingAdmin) external returns (uint);\n    function _acceptAdmin() external returns (uint
    );\n    function _setComptroller(ComptrollerInterface newComptroller) public returns (uint);\n    function _setReserveFactor(uint 
    newReserveFactorMantissa) external returns (uint);\n    function _reduceReserves(uint reduceAmount) external returns (uint);\n    function 
    _setInterestRateModel(InterestRateModel newInterestRateModel) public returns (uint);\n}\n\ncontract SErc20Storage {\n    /**\n     * @notice 
    Underlying asset for this SToken\n     */\n    address public underlying;\n}\n\ncontract SErc20Interface is SErc20Storage {\n\n    /*** User 
    Interface ***/\n\n    function mint(uint mintAmount) external returns (uint);\n    function redeem(uint redeemTokens) external returns (uint);\n   
     function redeemUnderlying(uint redeemAmount) external returns (uint);\n    function borrow(uint borrowAmount) external returns (uint);\n    
    function repayBorrow(uint repayAmount) external returns (uint);\n    function repayBorrowBehalf(address borrower, uint repayAmount) external 
    returns (uint);\n    function liquidateBorrow(address borrower, uint repayAmount, STokenInterface sTokenCollateral) external returns (uint);\n\n\n 
       /*** Admin Functions ***/\n\n    function _addReserves(uint addAmount) external returns (uint);\n}\n\ncontract SDelegationStorage {\n    /**\n  
       * @notice Implementation address for this contract\n     */\n    address public implementation;\n}\n\ncontract SDelegatorInterface is 
    SDelegationStorage {\n    /**\n     * @notice Emitted when implementation is changed\n     */\n    event NewImplementation(address 
    oldImplementation, address newImplementation);\n\n    /**\n     * @notice Called by the admin to update the implementation of the delegator\n     * 
    @param implementation_ The address of the new implementation for delegation\n     * @param allowResign Flag to indicate whether to call 
    _resignImplementation on the old implementation\n     * @param becomeImplementationData The encoded bytes data to be passed to 
    _becomeImplementation\n     */\n    function _setImplementation(address implementation_, bool allowResign, bytes memory becomeImplementationData) 
    public;\n}\n\ncontract SDelegateInterface is SDelegationStorage {\n    /**\n     * @notice Called by the delegator on a delegate to initialize it 
    for duty\n     * @dev Should revert if any issues arise which make it unfit for delegation\n     * @param data The encoded bytes data for any 
    initialization\n     */\n    function _becomeImplementation(bytes memory data) public;\n\n    /**\n     * @notice Called by the delegator on a 
    delegate to forfeit its responsibility\n     */\n    function _resignImplementation() public;\n}\n"},"Unitroller.sol":{"content":"pragma solidity 
    ^0.5.16;\n\nimport \"./ErrorReporter.sol\";\nimport \"./ComptrollerStorage.sol\";\n/**\n * @title ComptrollerCore\n * @dev Storage for the 
    comptroller is at this address, while execution is delegated to the `comptrollerImplementation`.\n * STokens should reference this contract as 
    their comptroller.\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    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 () external payable {\n        // delegate all other functions to current implementation\n       
     (bool success, ) = comptrollerImplementation.delegatecall(msg.data);\n\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"}}
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