> For the complete documentation index, see [llms.txt](https://docs.universalx.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.universalx.app/universal-gas.md).

# Universal Gas

UniversalX uses Universal Accounts' Universal Gas functionality, otherwise known as gas abstraction.

Thanks to Universal Gas, UniversalX users can pay the fees on a transaction using any Primary Token. Traditionally, transactions require fees to be paid in the native token of the network(s) you’re interacting with; however, in UniversalX, you can enjoy full gas flexibility.

<figure><img src="https://mintlify.s3.us-west-1.amazonaws.com/particlenetwork-fccf74d2/landing/modular-l1/images/universal-gas.png" alt=""><figcaption><p>Particle Network's Universal Gas.</p></figcaption></figure>

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### How does this work? <a href="#using-universal-gas" id="using-universal-gas"></a>

Below is a quick overview of how the **Particle Network Paymaster enables** Universal Gas by paying native gas on behalf of users, and then pays itself back from the users' balance across different chains.

<figure><img src="https://mintlify.s3.us-west-1.amazonaws.com/particlenetwork-fccf74d2/landing/modular-l1/images/using-universal-gas.jpg" alt=""><figcaption><p>Universal Gas: Technical implementation.</p></figcaption></figure>