# Data Availability Committee (DAC) XR One relies on an external Data Availability Committee (DAC) to store data and provide it on-demand instead of using Arbitrum One as the Data Availability (DA) layer. This significantly reduces transaction costs on XR One. The members of XR One's DAC run a Data Availability Server (DAS) to handle data storage and retrieval. Further details on the expansion of XR One's DAC are coming soon. XR One relies on an external Data Availability Committee (DAC) to store data and provide it on-demand instead of using Arbitrum One as the Data Availability (DA) layer. This significantly reduces transaction costs on XR One. The members of XR One's DAC run a Data Availability Server (DAS) to handle data storage and retrieval. Further details on the expansion of XR One's DAC are coming soon. --- # 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://xr-one.gitbook.io/xr/technology/xr-one/architecture/anytrust/data-availability-committee-dac.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.