# CDR #085: Davos.xyz | Guest oracle provision of Feds EFFR Rate

**URL:** <https://forum.diadata.org/t/cdr-085-davos-xyz-guest-oracle-provision-of-feds-effr-rate/945>\
**Category:** CDRs - Custom Delivery Requests\
**Tags:** zkevm, optimism, bsc, ethereum, arbitrum, defi, token-price-feed\
**Created:** [February 8, 2024, 9:45pm UTC](https://forum.diadata.org/t/cdr-085-davos-xyz-guest-oracle-provision-of-feds-effr-rate/945 "2024-02-08T21:45:30Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Davos\_Protocol](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.diadata.org/davos_protocol/32/471_2.png) [@Davos\_Protocol](https://forum.diadata.org/u/Davos_Protocol)\
**Post date:** [February 8, 2024, 9:45pm UTC](https://forum.diadata.org/t/cdr-085-davos-xyz-guest-oracle-provision-of-feds-effr-rate/945/1 "2024-02-08T21:45:30Z")

</div>

# INTRODUCTION

**Protocol** : Davos.xyz

**Website** : [https://davos.xyz/](https://davos.xyz/)

**Integration** : **Guest oracle provision of Feds EFFR Rate**

**Use case** : Tracking FED’s rate in order to determine the borrowing rate for minting DUSD

**Blockchain:** Ethereum, BNB Chain, Arbitrum, Optimism, Polygon zkEVM

# REQUEST INFORMATION

## Assets

The following assets will be included in the Oracle:

- [**EFFR [Target Range]**](https://markets.newyorkfed.org/static/docs/markets-api.html#/Reference%20Rates/get_api_rates_all_latest__format_)

## Methodology

Select the methodologies that will define the feeds:

- \*\*Pricing methodology: **24h update frequency will be applied for all values**
- \*\*Update trigger: **Every 120sec the oracle will check if the value has been updated. As soon as new value will be available, the update will be sent on-chain**

# DELIVERY INFORMATION

Select if the feed should be delivered on-chain via oracle and if so, which network:

- **Delivery method** : **Oracle on Ethereum, BNB Chain, Arbitrum, Optimism, Polygon zkEVM**
- **Testnet required** : No

* * *

_[Learn more about DIA CDRs here](https://forum.diadata.org/t/introducing-dia-cdrs-custom-delivery-requests/201)_

---

<div class="post-metadata">

**Author:** ![Samuel](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.diadata.org/samuel/32/119_2.png) [@Samuel](https://forum.diadata.org/u/Samuel)\
**Post date:** [February 20, 2024, 9:09pm UTC](https://forum.diadata.org/t/cdr-085-davos-xyz-guest-oracle-provision-of-feds-effr-rate/945/2 "2024-02-20T21:09:23Z")

</div>

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 oracles are deployed and can be accessed here:

- [Ethereum](https://etherscan.io/address/0xcb70730c4530ad60ac1c471e1aeae5599a6605cc)
- [Binance SmartChain](https://bscscan.com/address/0x90bf8DB6b9157e99a9FC15002fB5F08966E5B10e)
- [Arbitrum](https://arbiscan.io/address/0xd5f2e145b17f4a73a6cc915cb1237e5e496ed248)
- [Optimism](https://optimistic.etherscan.io/address/0xcf28c262d23d25b0f51f018432af1ca071363025)
- [Polygon zkEVM](https://zkevm.polygonscan.com/address/0x5bbaeafa2450c5579fe34ae8a37fe586b6285438)

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

1. The value of targetRateFrom from the NY Fed API with 8 decimals
2. The unix timestamp of the last update

You can see Solidity and Vyper code integration examples [here](https://docs.diadata.org/introduction/intro-to-dia-oracles/access-the-oracle#oracle-integration-example) or use a dedicated DIA oracles integration library described in detail [here](https://docs.diadata.org/introduction/intro-to-dia-oracles/access-the-oracle#accessing-dias-oracles-with-a-dedicated-solidity-library).

### Funding

Each deployed oracle contract 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](https://docs.diadata.org/introduction/intro-to-dia-oracles/oracle-funding).

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

Gas Wallet addresses:

- [Ethereum](https://etherscan.io/address/0xb94ab702882169522b364d1a036b3bdfe3b67064)
- [Binance SmartChain](https://bscscan.com/address/0x27357884e40600797086080f5feaeae3c766592a)
- [Arbitrum](https://arbiscan.io/address/0xc30fe3ef4a47c3dad6187745f04c044502cdab8c)
- [Optimism](https://optimistic.etherscan.io/address/0xe18f66554f91a7eeacd75a228495ccf343e95d81)
- [Polygon zkEVM](https://zkevm.polygonscan.com/address/0x13af0234c1702eb4cf32daf8f45f93a9b96f546a)