# Technical Overview The Passage Vault is implemented as a combination of an on-chain smart contract and off-chain logic that lives in Amazon Web Services. The on-chain smart contract is upgradable based on a 3 of 5 multi-signature wallet (i.e Gnosis SAFE). Bracket’s smart contracts have been audited by Halborn. Some of the computation logic used by the vault is performed off-chain within AWS. The vault’s smart contract logic guarantees that any computations from AWS can only affect creating passage orders for the vault and generating buy offers for traders attempting to sell their active passage trades prior to expiration. The computations from AWS can not request withdrawals or affect any other transaction that could possibly lead to a malicious transfer. --- # 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.bracket.fi/legacy-products/volatility-trading/passage-vault/technical-overview.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.