# UVaultStorage The `UVaultStorage.sol` contract is responsible for storing the storage variables and mappings specific to the UToken vault. ### Key storage variables: `_sharesTokenImp`: Address of the shares token implementation contract. `reserves`: Mapping of underlying asset addresses to their reserve data. `balances`: Mapping of underlying asset addresses to their market balance data. `borrowScaledBalanceByLoanId`: Mapping of underlying asset addresses and loan IDs to the scaled borrow balance. `borrowScaledBalanceByUser`: Mapping of underlying asset addresses and user addresses to the scaled borrow balance. --- # 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://devs.unlockd.finance/storage/uvaultstorage.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.