CDR #077 Mean Finance | PSP Price Feed

Proposals CDRs - Custom Delivery Requests
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18 December, 2023

INTRODUCTION

Protocol: Mean Finance

Integration: The integration will provide real-time price feeds for assets supported on Mean Finance’s DCA protocol. Mean Finance enables users to Dollar Cost Average (DCA) any ERC20 into any ERC20 with their preferred period frequency.

Use case: Oracle on DeFi

Blockchain: Optimism

REQUEST INFORMATION

Assets

Following assets will be included in the Oracle:

Asset Ticker Asset Blockchain Asset Address Asset Markets Overview Comments
PSP Ethereum 0xcAfE001067cDEF266AfB7Eb5A286dCFD277f3dE5 PSP Asset Information

Methodology

  • Moving Average Price with Interquartile Range (MAIR) will be used to calculate the price for the asset. Learn more about it here.

  • 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

Notes:

  • Asset specific calling convention

DELIVERY INFORMATION

Delivery Method Oracle on Optimism
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 “PSP/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: 0x3d7c296da715fac6be1987d08c7bcff2394965ae

Markets

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

  1. Ethereum-0xcAfE001067cDEF266AfB7Eb5A286dCFD277f3dE5

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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Hey @Samuel - Would it be possible to increase to a a 1% deviation threshold for $PSP? :pray:

4

The change has been implemented.

5

Hey @Samuel - After some testing, we would like to increase to a a 1.5% deviation threshold for $PSP :pray:

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The oracle threshold has been increased to 1.5%.

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