> For the complete documentation index, see [llms.txt](https://ston-fi.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ston-fi.gitbook.io/docs/developer-section/dex/sdk/v1.md).

# v1 SDK

The remaining sections of the documentation will demonstrate specific examples of the DEX usage:

* [methods reference](/docs/developer-section/dex/sdk/v1/reference.md)
* [perform a swap operation](/docs/developer-section/dex/sdk/v1/swap.md)
* [provide liquidity](/docs/developer-section/dex/sdk/v1/provide-liquidity.md)
* [refund liquidity](/docs/developer-section/dex/sdk/v1/refund-liquidity.md)
* [burn liquidity tokens](/docs/developer-section/dex/sdk/v1/burn-lp-tokens.md)

## Referral Fees

DEX v1 pays the referrer fee directly inside each swap transaction. The rate is fixed at **0.1 %** and the specified `referrer_address` receives the tokens immediately.

Track payouts using the Stats & Vaults REST API:

* `GET /v1/stats/fee_accruals` – shows all operations leading to fee accrual for the referrer, filterable by period
* `GET /v1/stats/fee_withdrawals` – lists withdrawals from the referrer's vaults by period
* `GET /v1/stats/fees` – returns aggregated referral fee information such as total accrued USD value

See the [Omniston referral fees guide](/docs/developer-section/omniston/referral-fees.md#referral-fees-with-dex-v1) (remember: although the guide focuses on Omniston, the linked paragraph explains DEX V1 referral fees in detail). Full API docs are available in the [Swagger UI](https://api.ston.fi/swagger-ui/#/).