> For the complete documentation index, see [llms.txt](https://docs.yfx.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.yfx.com/previous-version/what-is-yfx-v1.md).

# VFX V1

YFX V1 was first deployed on Tron in January 2021. Later it was deployed to Heco, BSC, and xDai.

## YFX V1 Whitepaper

<https://yfxdefi.medium.com/yfx-white-paper-d9a4feacf0b7>

{% hint style="danger" %}
YFX V4 is now live, and support for the Tron, Heco, BSC, and xDAI public chains has been suspended. Please redeem your funds as soon as possible.

<https://trx.yfx.com/>

<https://ht.yfx.com/>

<https://bsc.yfx.com/>

<https://xdai.yfx.com/>
{% endhint %}

For more info, please view the docs under YFX V2.


---

# 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.yfx.com/previous-version/what-is-yfx-v1.md?ask=<question>&goal=<endgoal>
```

`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.