# Flat Money Flat Money is a Chamber sibling brand. In its current form (v2), it's a **perpetual options contract layer** on Arbitrum that [Toros](/ecosystem/toros-finance.md) uses as the underlying mechanism for its options strategies. There's no standalone end-user front-end right now. Flat Money sits as infrastructure; depositors interact with it indirectly by holding Toros options tokens. ## Status * **v1 — deprecated.** The original Flat Money product (flatcoin / UNIT) is wound down. * **v2 — live.** Perpetual options contracts on Arbitrum, used internally by Toros. The standalone product direction is in flux. This page will be rewritten if and when a direct end-user product ships. ## Relationship to Chamber Same team, same treasury, same [10% DAO fee split](/treasury-and-protocol-economics/dao-protocol-fees.md) on anything that earns fees through the stack. See [Ecosystem overview](/ecosystem/overview.md) for how the sibling brands fit together. --- # 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.chamberfi.com/ecosystem/flat-money.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.