# Generation and Redemption Antimatter token is a perpetual option. There are two token types: call token and put token, which correspond to call and put perpetual options. To understand how they work, we have a price interval that contains the current price of a specific cryptocurrency and in this model we anticipate that the price of the cryptocurrency will change within this interval. If we work with ETH and USDT and in case that the price varies within the interval, one can generate antimatter token(call and(or) put) by providing two types of underlying assets, such as ETH and USDT. Typically, one needs to provide more ETH to generate a call token and more USDT to generate a put token. The redemption of tokens is simply exercising corresponding options. In essence, all call and put tokens have underlying asset backed onchain. **Uniswap Smart Router:**\ Thank to Uniswap's Smart Router, participants are able to use any tokens through uniswap to generate and redeem call and put tokens. When a user use token A to generate a call, router will allocation A into two underlying assets following the underlying asset ratio. --- # 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.antimatter.finance/antimatter-perpetual-options/core-concept/generation-and-redemption.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.