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docs: add DIA to oracles
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74 changes: 47 additions & 27 deletions app-developers/tools/data/oracles.mdx
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Original file line number Diff line number Diff line change
@@ -1,17 +1,23 @@
---
title: Oracles
description: Learn about different oracles and how you can use them to access offchain data
description:
Learn about different oracles and how you can use them to access offchain data
onchain as well as random number generation.
---

<Info>
This page includes providers that meet specific [inclusion criteria](#inclusion-criteria), as outlined below. Please visit the [community oracles page](https://github.com/ethereum-optimism/developers/blob/main/community/tools/oracles.md) for an additional listing of third-party Oracles.
This page includes providers that meet specific [inclusion
criteria](#inclusion-criteria), as outlined below. Please visit the [community
oracles
page](https://github.com/ethereum-optimism/developers/blob/main/community/tools/oracles.md)
for an additional listing of third-party Oracles.
</Info>

This reference guide lists different Oracles you can use when building on Optimism. [Oracles](https://ethereum.org/en/developers/docs/oracles/) provide offchain data onchain. This allows code running on a blockchain to access a wide variety of information.
For example, a [stablecoin](https://ethereum.org/en/stablecoins/) that accepts ETH as collateral needs to know the ETH/USD exchange rate:

* How many stablecoins can we give a user for a given amount of ETH?
* Do we need to liquidate any deposits because they are under collateralized?
- How many stablecoins can we give a user for a given amount of ETH?
- Do we need to liquidate any deposits because they are under collateralized?

## Security and decentralization

Expand Down Expand Up @@ -45,14 +51,14 @@ It can also calculate the total cost of a transaction for you before you send it

This contract is a predeploy at address `0x420000000000000000000000000000000000000F`:

* [On OP Mainnet](https://explorer.optimism.io/address/0x420000000000000000000000000000000000000F#readContract)
* [On OP Sepolia](https://testnet-explorer.optimism.io/address/0x420000000000000000000000000000000000000F)
- [On OP Mainnet](https://explorer.optimism.io/address/0x420000000000000000000000000000000000000F#readContract)
- [On OP Sepolia](https://testnet-explorer.optimism.io/address/0x420000000000000000000000000000000000000F)

This is a push Oracle.
OP Mainnet (and the testnets) updates the gas price parameters onchain whenever those parameters change.
The L1 gas price, which can be volatile, is only pushed once every 5 minutes, and each time can change only by up to 20%.

* [Blocknative](https://docs.blocknative.com/gas-prediction) provides real-time gas estimation powered by predictive modeling to forecast gas price distribution for select OP Stack chains, including OP Mainnet and Base. The [API](https://docs.blocknative.com/gas-prediction) is also available on Ethereum Mainnet to estimate base fee costs.
- [Blocknative](https://docs.blocknative.com/gas-prediction) provides real-time gas estimation powered by predictive modeling to forecast gas price distribution for select OP Stack chains, including OP Mainnet and Base. The [API](https://docs.blocknative.com/gas-prediction) is also available on Ethereum Mainnet to estimate base fee costs.

### API3

Expand All @@ -70,23 +76,23 @@ API3's QRNG provides dApps with truly random numbers based on quantum mechanics
Chainlink powers verifiable applications and high-integrity markets for banking, DeFi, global trade, gaming, and other major sectors.

Chainlink provides a number of [price feeds](https://docs.chain.link/docs/optimism-price-feeds/).
Those feeds are available on the production network @ [Op Mainnet](https://docs.chain.link/data-feeds/price-feeds/addresses?network=optimism\&page=1#optimism-mainnet).
Those feeds are available on the production network @ [Op Mainnet](https://docs.chain.link/data-feeds/price-feeds/addresses?network=optimism&page=1#optimism-mainnet).

* Data Feeds: Chainlink Data Feeds provide a secure, reliable, and decentralized source of off-chain data to power unique smart contract use cases for DeFi and beyond.
* Automation: Chainlink Automation is an ultra-reliable and performant smart contract automation solution enabling developers to quickly scale their operations in a verifiable, decentralized, and cost-efficient manner, to build next-generation apps.
* CCIP: Chainlink CCIP provides a secure interoperability protocol for powering token transfers and sending arbitrary messages cross-chain.
- Data Feeds: Chainlink Data Feeds provide a secure, reliable, and decentralized source of off-chain data to power unique smart contract use cases for DeFi and beyond.
- Automation: Chainlink Automation is an ultra-reliable and performant smart contract automation solution enabling developers to quickly scale their operations in a verifiable, decentralized, and cost-efficient manner, to build next-generation apps.
- CCIP: Chainlink CCIP provides a secure interoperability protocol for powering token transfers and sending arbitrary messages cross-chain.

This is a push Oracle. See the [Using Data Feeds guide](https://docs.chain.link/docs/get-the-latest-price/) to learn how to use the Chainlink feeds.

* Chainlink VRF provides cryptographically secure randomness for blockchain-based applications. More details [here](https://chain.link/vrf)
- Chainlink VRF provides cryptographically secure randomness for blockchain-based applications. More details [here](https://chain.link/vrf)

### Chronicle

The first Oracle on Ethereum, Chronicle's decentralized Oracle network was originally built within MakerDAO for the development of DAI and is now available to builders on OP Mainnet and the Superchain.

* **Data Feeds**: Builders can choose from 65+ data feeds, including crypto assets, yield rates, and RWAs. Chronicle's data is sourced via custom-built data models, only utilizing Tier 1 Primary Sources, such as the markets where tokens are actively traded, including Coinbase, Binance, Uniswap, and Curve.
* **Transparency & Integrity**: Chronicle's Oracle network is fully transparent and verifiable. Via [The Chronicle](https://chroniclelabs.org/dashboard/oracle/DAI/USD?blockchain=OPT\&txn=0x53e60e6e79eb938e5ca3ca6c56b0795e003dd6b3a17cfd810ca5042b3d33b680\&contract=0x104916d38828DA8B83a88A1775Aa058e1F0B1647), the data supply chain for any Oracle can be viewed in real-time and historically, including data sources and the identity of all Validators/Signers. Users can cryptographically challenge the integrity of every Oracle update using the 'verify' feature. Data is independently sourced by a [community of Validators](https://chroniclelabs.org/validators), including Gitcoin, Etherscan, Infura, DeFi Saver, and MakerDAO.
* **Gas Efficiency:** Pioneering the Schnorr-based Oracle architecture, Chronicle's Oracles use 60-80% less gas per update than other Oracle providers. This lowest cost per update allows Push Oracle updates to be made more regularly, ensuring more accurate and granular data reporting.
- **Data Feeds**: Builders can choose from 65+ data feeds, including crypto assets, yield rates, and RWAs. Chronicle's data is sourced via custom-built data models, only utilizing Tier 1 Primary Sources, such as the markets where tokens are actively traded, including Coinbase, Binance, Uniswap, and Curve.
- **Transparency & Integrity**: Chronicle's Oracle network is fully transparent and verifiable. Via [The Chronicle](https://chroniclelabs.org/dashboard/oracle/DAI/USD?blockchain=OPT&txn=0x53e60e6e79eb938e5ca3ca6c56b0795e003dd6b3a17cfd810ca5042b3d33b680&contract=0x104916d38828DA8B83a88A1775Aa058e1F0B1647), the data supply chain for any Oracle can be viewed in real-time and historically, including data sources and the identity of all Validators/Signers. Users can cryptographically challenge the integrity of every Oracle update using the 'verify' feature. Data is independently sourced by a [community of Validators](https://chroniclelabs.org/validators), including Gitcoin, Etherscan, Infura, DeFi Saver, and MakerDAO.
- **Gas Efficiency:** Pioneering the Schnorr-based Oracle architecture, Chronicle's Oracles use 60-80% less gas per update than other Oracle providers. This lowest cost per update allows Push Oracle updates to be made more regularly, ensuring more accurate and granular data reporting.

Every Oracle implementation is customized to fit your needs. Implement one of our existing data models or contact Chronicle to develop custom Oracle data feeds via [Discord](https://discord.gg/CjgvJ9EspJ) or [Email](mailto:gm@chroniclelabs.org). Developers can dive deeper into Chronicle Protocol's architecture and unique design choices [via the docs](https://docs.chroniclelabs.org/).

Expand All @@ -96,37 +102,51 @@ Every Oracle implementation is customized to fit your needs. Implement one of ou

Gelato VRF (Verifiable Random Function) provides trustable randomness on EVM-compatible blockchains. Here's a brief overview:

* Contract Deployment: Use GelatoVRFConsumerBase.sol as an interface for requesting random numbers.
* Requesting Randomness: Emit the RequestedRandomness event to signal the need for a random number.
* Processing: Gelato VRF fetches the random number from Drand.
* Delivery: The fulfillRandomness function delivers the random number to the requesting contract.
- Contract Deployment: Use GelatoVRFConsumerBase.sol as an interface for requesting random numbers.
- Requesting Randomness: Emit the RequestedRandomness event to signal the need for a random number.
- Processing: Gelato VRF fetches the random number from Drand.
- Delivery: The fulfillRandomness function delivers the random number to the requesting contract.

Ready to integrate? Head over to the [Gelato VRF Quick Start Guide](https://docs.gelato.network/web3-services/vrf/quick-start).

### Pyth Network

The Pyth Network is a financial oracle network which delivers over 400 low-latency, high-fidelity price feeds across cryptocurrencies, FX pairs, equities, ETFs, and commodities.

* Pyth's price data is sourced from over [95 first-party sources](https://pyth.network/publishers) including exchanges, market makers, and financial services providers.
* Pyth [Price Feeds](https://www.pyth.network/developers/price-feed-ids) offer both the real-time spot price of the asset as well as an accompanying confidence interval band around that price
* The Pyth [TradingView](https://docs.pyth.network/guides/how-to-create-tradingview-charts) integration allows users to view and display Pyth prices on their own website and UI.
- Pyth's price data is sourced from over [95 first-party sources](https://pyth.network/publishers) including exchanges, market makers, and financial services providers.
- Pyth [Price Feeds](https://www.pyth.network/developers/price-feed-ids) offer both the real-time spot price of the asset as well as an accompanying confidence interval band around that price
- The Pyth [TradingView](https://docs.pyth.network/guides/how-to-create-tradingview-charts) integration allows users to view and display Pyth prices on their own website and UI.

You can explore the full catalog of Pyth Price Feed IDs for [OP Mainnet and Sepolia (EVM Stable)](https://www.pyth.network/developers/price-feed-ids).

* Pyth Entropy allows developers to quickly and easily generate secure random numbers on the blockchain. More details [here](https://pyth.network/blog/secure-random-numbers-for-blockchains)
- Pyth Entropy allows developers to quickly and easily generate secure random numbers on the blockchain. More details [here](https://pyth.network/blog/secure-random-numbers-for-blockchains)

### RedStone

[RedStone](https://redstone.finance/) offers flexible Data Feeds for Lending Markets, Perpetuals, Options, Stablecoins, Yield Aggregators and other types of novel DeFi protocols. The infrastructure is well battle-tested and secures hundreds of millions of USD across mainnet.

Builders can choose how they want to consume the data among 3 dedicated models:

* [RedStone Core](https://docs.redstone.finance/docs/dapps/redstone-pull/) (pull oracle) - less than 10s update time, broad spectrum of feeds, best for most use cases. All [Core Price Feeds](https://app.redstone.finance/#/app/tokens) are available on OP Mainnet & OP Sepolia.
* [RedStone Classic](https://docs.redstone.finance/docs/dapps/redstone-push/) (push oracle) - for protocols designed for the traditional oracle interface, customizable heartbeat and deviation threshold.
* [Hybrid (push + push) ERC7412](https://docs.redstone.finance/docs/dapps/redstone-erc7412/) - specifically for Perps and Options, highest update frequency and front-running protection.
- [RedStone Core](https://docs.redstone.finance/docs/dapps/redstone-pull/) (pull oracle) - less than 10s update time, broad spectrum of feeds, best for most use cases. All [Core Price Feeds](https://app.redstone.finance/#/app/tokens) are available on OP Mainnet & OP Sepolia.
- [RedStone Classic](https://docs.redstone.finance/docs/dapps/redstone-push/) (push oracle) - for protocols designed for the traditional oracle interface, customizable heartbeat and deviation threshold.
- [Hybrid (push + push) ERC7412](https://docs.redstone.finance/docs/dapps/redstone-erc7412/) - specifically for Perps and Options, highest update frequency and front-running protection.

Interested in integration? [Get in contact](https://discord.com/invite/PVxBZKFr46) with the RedStone team!

### DIA

[DIA](https://www.diadata.org/) is a cross-chain, trustless oracle network delivering verifiable price feeds for Optimism. DIA sources raw trade data directly from primary markets and computes it onchain, ensuring complete transparency and data integrity.

- Complete verifiability from source to destination smart contract.
- Direct data sourcing from 100+ primary markets eliminating intermediary risk.
- Support for 20,000+ assets across all major asset classes.
- Custom oracle configuration with tailored sources and methodologies.

To get started:

- [Explore the Optimism Oracle Integration Guide](https://www.diadata.org/docs/guides/chain-specific-guide/optimism)
- [Request a Custom Oracle](https://www.diadata.org/docs/guides/how-to-guides/request-a-custom-oracle)

## Next steps

* Looking for other developer tools? See [developer tools overview](/app-developers/tools) to explore more options!
- Looking for other developer tools? See [developer tools overview](/app-developers/tools) to explore more options!