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# System prepended metadata

title: docs/builder/gas-tank

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## Welcome to the Gas Tank in Builder

Sequence wallets are controlled by smart contracts, enabling transaction fees to be abstracted away from users, a concept known in web3 as *gas*. With Sequence Builder's Gas Tank, you have a streamlined process for sponsoring gas for your users.

#### Why would I want to sponsor gas for my game?
Obtaining the crypto needed to cover fees poses a challenge for traditional gamers. Sponsoring gas on their behalf solves this problem.    

Gas sponsoring in a web3 game provides seamless onboarding by removing gas fees, making transactions efficient and cost-effective for trading virtual assets in various in-game activities. This creates a more enjoyable gaming experience, fostering player loyalty and community engagement.

#### Sponsoring gas with the Gas Tank
Sponsoring gas on contracts is easy, and can be done either by searching and adding a contract or selecting a contract that you have already deployed on a project. Project owners also have control over the contracts they sponsor, allowing them to temporarily disable a sponsor for a specific contract by toggling it off and updating the sponsor settings.

There are a few options to fund sponsored gas, including a credit card checkout that makes paying for gas simple. 


## Watch the Gas Tank in action in Builder

<iframe width="560" height="315" src="https://www.youtube.com/embed/tDn4nd9Mi-c?si=xdAUBb1_hGusNAFJ" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>



## Related guides and walkthroughs

_will add walkthroughs and step-by-steps here_

Paying the fees on their behalf allows them to do transactions without having to acquire crypto in the first place