CDR #079 Preon Finance I STAR Price Feed

21 December, 2023


Protocol: Preon Finance


Integration: Preon is a state-of-the-art decentralized lending protocol built on Arbitrum, allowing users to borrow up against their portfolio. The integration will provide Preon with real time pricing information for their native $STAR stablecoin.



Following assets will be included in the Oracle:

Asset Ticker Asset Blockchain Asset Address Asset Markets Overview
STAR Arbitrum 0xC19669A405067927865B40Ea045a2baabbbe57f5 STAR Asset Information

Note: Asset Specific Calling Convention


  • Moving Average Price with Interquartile Range (MAIR) will be used to calculate the price for the asset.
  • 0.5% deviation threshold for updates trigger will be applied
  • 120s trades aggregation window size will be applied
  • The feed will be updated every 24h period if there are no deviation based updates


Delivery Method: Oracle on Arbitrum
Feeder Type: Asset Specific Calling Convention
Is testnet deployment required?: No

Thank you for requesting a data feed via DIA CDR. We confirm the CDR specifications were requested correctly. Find the oracle information below:


The oracle is deployed and can be accessed here.

The adapter for the Asset specific calling convention can be found here.

The interface is described in our documentation.

You can query for assets by calling the read function getValue() with parameters such as “STAR/USD”. It will return two values:

  1. The price of the asset queried with 8 decimals
  2. The unix timestamp of the last update

You can see Solidity and Vyper code integration examples here or use a dedicated DIA oracles integration library described in detail here.


Each deployed oracle has a separate gas wallet which is the only entity allowed to update oracle values based on selected parameters. To find out more information on how it works, visit the following link.

Please make sure to top up the gas wallet, as we only put in some gas to deploy and start the oracle.

Gas Wallet address: 0x3386e08764c044ce407c70c836748e62419e6082


You can view the markets included for each feed by pressing on a link to DIA App in the deployed assets list:

  1. Arbitrum-0xC19669A405067927865B40Ea045a2baabbbe57f5

Note: DIA uses Blockchain-Address querying formatting to ensure asset selection precision (token symbols might duplicate)

You can also query current asset prices and find other market information on the asset by using the DIA API as described here.