> For the complete documentation index, see [llms.txt](https://docs.chainargos.com/documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.chainargos.com/documentation/concept-glossary/gas-and-gas-funding.md). # Gas & Gas Funding Transactions on Ethereum require paying fees known as “gas.” The network itself – the operators of the network – collect these fees in exchange for processing transactions. Many custody providers including, but not limited to, exchanges, custodians, trust providers and other service providers offer facilities to “fund gas” for their clients. For example a large custody provider will generally have one or more “gas funding addresses” which periodically make small transfers of ETH to addresses under their control to pay for administrative transactions and the like. For large providers with many clients these addresses are generally well known. This is unsurprising as their entire customer base, plus many counterparties of their customer base, can see the transfers. This makes attribution of custody/control to a service provider via these addresses reliable. In the case of service providers which offer multiple services this process can be exceptionally reliable. For example if an address has gas funded by X’s gas funding address and that gas is routinely used to fund transfers to X’s exchange *and no other exchanges* then we can be extremely sure the custody address belongs to X. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## 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, and the optional `goal` query parameter: ``` GET https://docs.chainargos.com/documentation/concept-glossary/gas-and-gas-funding.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. 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.