> For the complete documentation index, see [llms.txt](https://docs.bancor.network/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bancor.network/developer-guides/write-functions/flashloan.md). # Flashloan ## Overview All assets in Bancor v3 can be borrowed using flash loans. A flash loan is a Web 3 innovation giving anyone access to vast amounts of capital for a single transaction, while using the blockchain to guarantee that the funds are all returned (in addition to a fee). A slightly more technical definition is that the flash loan only executes if it is returned along with the fee in the same transaction that it is borrowed, otherwise it reverts. This can be difficult to understand at first, both because it has no parallel in the traditional finance world, and because it involves an understanding of how blockchain transactions work. --- # 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.bancor.network/developer-guides/write-functions/flashloan.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.