# App Vault All user fund in DeltaDeFi sits on a single validator address - App Vault. When you send funds to the App Vault address, you can create an on-chain proof of asset ownership record. With that proof, you can redeem the equivalent asset value from the App Vault. In this session, we will dive deeper into what exactly you are trading on DeltaDeFi, given all values are sitting on the same address all the time. ### Depositing Depositing is an action where there is actual value inflow to the App Vault. At the time of deposit, users can create a distinct proof of asset ownership. ### Trading Trading is then a notion of users trading against each other's proof of asset ownership, with the underlying asset value itself untouched. ### Withdrawal Withdrawal is an action where there is actual value outflow from the App Vault. At the time of withdrawal, users can use their proof of asset ownership to redeem assets out of the DeltaDeFi validator system. --- # 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.deltadefi.io/about/learn/architecture/app-vault.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.