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Oracles

Oracles enable access to reliable off-chain data and information that might be necessary for for smart contracts to enable specific use cases.

The most common requirement is token prices for different token pairs. There are more complex use cases as well, for example:

  • Dynamic NFTs that have variable properties that can change based on events that happen in the real world
  • Some dApps require access to a reliable source of random numbers

Oracles are essentially API services that smart contracts can use to fetch off-chain data.

API3​

The API3 Market provides access to 200+ price feeds on Mantle. The price feeds are delivered by an aggregate of first-party oracles using signed data and support OEV recapture.

Apart from data feeds, API3 also provides Quantum Random Number Generation on Mantle. QRNG is a free-to-use service that provides quantum randomness on-chain. It is powered by Airnode, the first-party oracle that is directly operated by the QRNG API providers.

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Chronicle​

The first Oracle on Ethereum, Chronicle’s decentralized Oracle network was originally built within MakerDAO for the development of DAI. Trusted and utilized by leading DeFi protocols such as Spark, MakerDAO, and Morpho, Chronicle Protocol is now available to builders on Mantle testnet and mainnet.

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  • 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, 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, 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.

ORA​

ORA is Ethereum's Trustless AI. ORA is the verifiable oracle protocol that brings AI and complex compute onchain.

ORA’s main product, Onchain AI Oracle (OAO), brings AI onchain.

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Some useful links to build with OAO on Mantle:

Pyth Network​

Pyth network is an oracle that publishes financial market data to multiple blockchains. They aggregate price data and provide price feeds for different asset types such as US equities, commodities, and other cryptocurrencies.

RedStone​

RedStone is a data ecosystem that delivers frequently updated, reliable and diverse data for your dApp and smart contracts.

SupraOracles​

SupraOracles provides access to reliable price feeds on multiple chains, and Verifiable Random Function (VRF).

Last updated on by whisker