# Overview **A cross-Rollup Order Book DEX built on Scroll.** By adopting Scroll infrastructure, Zada Finance can achieve the characteristics of composability, low cost and high speed. In 2023, Zada Finance will realize the iteration from AMM DEX to Order Book DEX and establish the first cross-rollup order book DEX on Scroll. **The characteristics of Zada Finance** **Composability:** Zada Finance uses Scroll’s zkEVM technology solution. Scroll supports the third level of EVM equivalence compared to other dedicated circuit solutions, making it easier to integrate mature Defi services on Ethereum. **Lower gas fee:** zkRollup is the transaction operation under the aggregation chain, and uses zero-knowledge proof technology to compress the data of the up-chain, reducing transaction gas fees. And we are exploring a Layer3 solution to further reduce user fees and ultimately achieve a fee experience close to 0 gas. **Security:** zkRollup integrates Ethereum security to achieve the maximum unity of security, efficiency and decentralization. We will also publish the content and technical documentation in the future. **Contact us** If you have any questions or would like to join our community, please see "[Contact Us](https://zadafinance.gitbook.io/zada-finance/link)" in the documentation. --- # 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://zadafinance.gitbook.io/zada-finance/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.