# VTokenInterfaces ## VTokenStorage Storage layout used by the `VToken` contract ## Solidity API ```solidity struct BorrowSnapshot { uint256 principal; uint256 interestIndex; } ``` #### underlying Underlying asset for this VToken ```solidity address underlying ``` *** #### name EIP-20 token name for this token ```solidity string name ``` *** #### symbol EIP-20 token symbol for this token ```solidity string symbol ``` *** #### decimals EIP-20 token decimals for this token ```solidity uint8 decimals ``` *** #### protocolShareReserve Protocol share Reserve contract address ```solidity address payable protocolShareReserve ``` *** #### comptroller Contract which oversees inter-vToken operations ```solidity contract ComptrollerInterface comptroller ``` *** #### interestRateModel Model which tells what the current interest rate should be ```solidity contract InterestRateModel interestRateModel ``` *** #### reserveFactorMantissa Fraction of interest currently set aside for reserves ```solidity uint256 reserveFactorMantissa ``` *** #### accrualBlockNumber Block number that interest was last accrued at ```solidity uint256 accrualBlockNumber ``` *** #### borrowIndex Accumulator of the total earned interest rate since the opening of the market ```solidity uint256 borrowIndex ``` *** #### totalBorrows Total amount of outstanding borrows of the underlying in this market ```solidity uint256 totalBorrows ``` *** #### totalReserves Total amount of reserves of the underlying held in this market ```solidity uint256 totalReserves ``` *** #### totalSupply Total number of tokens in circulation ```solidity uint256 totalSupply ``` *** #### badDebt Total bad debt of the market ```solidity uint256 badDebt ``` *** #### protocolSeizeShareMantissa Share of seized collateral that is added to reserves ```solidity uint256 protocolSeizeShareMantissa ``` *** #### shortfall Storage of Shortfall contract address ```solidity address shortfall ``` *** #### reduceReservesBlockDelta delta block after which reserves will be reduced ```solidity uint256 reduceReservesBlockDelta ``` *** #### reduceReservesBlockNumber last block number at which reserves were reduced ```solidity uint256 reduceReservesBlockNumber ``` *** ```solidity struct RiskManagementInit { address shortfall; address payable protocolShareReserve; } ``` #### isVToken Indicator that this is a VToken contract (for inspection) ```solidity function isVToken() external pure virtual returns (bool) ``` **Return Values** | Name | Type | Description | | ---- | ---- | ----------- | | \[0] | bool | Always true | *** --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs-v4.venus.io/technical-reference/reference-isolated-pools/vtoken/vtoken-interfaces.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.