# Using DIA with Stacks
DIA's oracle protocol utilizes a push price model. As the developer, you would only need to fetch prices directly from DIA's Clarity contracts.
Price data can be fetched in Clarity by making an external call to the DIA `.dia-oracle` contract’s `get-value` read-only function with the desired asset pair.
### DIA's Clarity Contracts
{% hint style="info" %}
For the full list of supported asset feeds for Stacks with DIA, check out their docs [here](https://www.diadata.org/docs/nexus/how-to-guides/fetch-price-data/chain-specific-guide/stacks).
{% endhint %}
### Example
Below is an example where we are fetching the sBTC price and determining if a user has the required minimum balance to join a whitelist.
It does this by:
* Reading the **current sBTC/USD price** from DIA’s on-chain oracle
* Reading the caller’s **sBTC balance**
* Calculating the USD value of that balance
* Whitelisting the user if they meet a minimum threshold
In short: **prove you hold enough sBTC (by USD value) to be eligible for a whitelist.**
{% hint style="warning" %}
All price feeds from DIA's Clarity contracts all have an implicit decimal place of 8 unless specified otherwise.
{% endhint %}
(define-constant MIN-SBTC-BALANCE u100)
(define-constant ERR_READING_SBTC_BALANCE (err u7001))
(define-constant ERR_NOT_ENOUGH_SBTC (err u7002))
(define-constant ERR_NOT_OWNER (err u7003))
(define-constant SBTC-PRICE-EXPO 8)
(define-map whitelist
principal
bool
)
(define-public (check-eligibility)
(let (
(sbtc-price-data (unwrap-panic (contract-call? 'SP1G48FZ4Y7JY8G2Z0N51QTCYGBQ6F4J43J77BQC0.dia-oracle
get-value "sBTC/USD"
)))
(sbtc-usd-price (to-int (get value sbtc-price-data)))
(price-denomination (pow 10 SBTC-PRICE-EXPO))
(adjusted-price (to-uint (/ sbtc-usd-price price-denomination)))
(user-sbtc-balance (unwrap!
(contract-call? 'SM3VDXK3WZZSA84XXFKAFAF15NNZX32CTSG82JFQ4.sbtc-token
get-balance-available tx-sender
)
ERR_READING_SBTC_BALANCE
))
)
(if (> (/ (* user-sbtc-balance adjusted-price) (to-uint price-denomination))
MIN-SBTC-BALANCE
)
(ok (map-set whitelist tx-sender true))
ERR_NOT_ENOUGH_SBTC
)
)
)
***
### Additional Resources
* \[[Hiro YT](https://youtu.be/bhWQxHGpv2s?si=RsKaCe169Vu6zw_e)] How to use DIA's price data featuring Khawla, Product Manager @ DIA
* \[[DIA Docs](https://www.diadata.org/docs/nexus/how-to-guides/fetch-price-data/chain-specific-guide/stacks)] The Stacks guide in DIA's docs
* \[[Twitter](https://x.com/DIAdata_org/status/1945476086110032147)] DIA x Stacks Oracle Grants
---
# Agent Instructions: 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:
```
GET https://docs.stacks.co/more-guides/price-oracles/dia.md?ask=
```
The question should be specific, self-contained, and written in natural language.
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.