# NAV Engine At the center of the vault is the NAV engine: the deterministic function that computes `totalAssets()`. Unlike single-chain vaults, Multistake must aggregate value across multiple planes where assets may be: * deployed * mid-strategy * unwinding * bridging * accruing rewards The NAV engine computes the total value using only *validated* data: * zkSync-local balances * validated Multi-chain balances * validated reward tokens * discounted values when any plane is paused * outstanding withdrawal liabilities * pending deposits with confirmed settlement No unvalidated value can enter NAV.\ No execution plane can influence NAV directly. If a strategy plane stops reporting or its oracle becomes stale, that plane’s value is discounted to a conservative fallback until validation resumes. --- # 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://multistake-1.gitbook.io/multistake-docs/documentation/zksync-home-vault/the-core-of-multistake/nav-engine.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.