CDR #082 Preon Finance I STAR Price Feed

Proposals CDRs - Custom Delivery Requests
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INTRODUCTION

Protocol: Preon Finance

Website: https://www.preon.finance/

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

REQUEST INFORMATION

Assets

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

Methodology

  • 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 INFORMATION

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

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

Oracle

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.

Funding

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: 0x43E180989113cC027aA442F5289726bD17D696d2

Markets

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.

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Thank you very much!

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The SPHERE asset (Polygon-0x62F594339830b90AE4C084aE7D223fFAFd9658A7) was added to the oracle.