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Documentation Index

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Blockchain oracles are third-party services that deliver external data to smart contracts. Because smart contracts cannot directly query off-chain sources, oracles act as trusted intermediaries that fetch, verify, and post real-world data—such as asset prices, random numbers, or off-chain event outcomes—onto the blockchain. Fuse Network supports multiple oracle providers. Each provides different guarantees around data sourcing, update frequency, and verification methodology.

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SupraOracles

Supra is a high-throughput oracle and IntraLayer platform offering cross-chain solutions including data oracles, asset bridges, and automation networks. Supra’s distributed Verifiable Random Function (dVRF) solution provides cryptographically secure, low-latency randomness for use cases such as NFT minting, on-chain lotteries, and blockchain gaming. Supra’s dVRF design uses a novel Non-Interactive Distributed Key Generation (NI-DKG) scheme. The dVRF paper was accepted into ACM CCS 2023.

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Supra contracts on Fuse

The following Supra smart contracts are deployed on Fuse mainnet:
ContractAddressVersion
Supra Router Contract0x1daB558F090029580854FbCF8f83ef3Ad8C223b5V2
Supra Deposit Contract0x7a168e3AE8B701648D4f8F89B5fCD278885eBeFAV2

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Using Supra in a smart contract

To consume a Supra price feed, call the Router Contract. The interface below shows how to request and read a price pair. 
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface ISupraSValueFeed {
    function getSvalue(uint64 _pairIndex)
        external
        view
        returns (bytes32, bool);
}

contract SupraPriceConsumer {
    ISupraSValueFeed internal sValueFeed;

    constructor() {
        // Supra Router Contract on Fuse mainnet
        sValueFeed = ISupraSValueFeed(0x1daB558F090029580854FbCF8f83ef3Ad8C223b5);
    }

    function getPrice(uint64 pairIndex)
        external
        view
        returns (bytes32 price, bool isDecimal)
    {
        return sValueFeed.getSvalue(pairIndex);
    }
}
For full documentation on pair indices and advanced features, see the Supra developer docs.

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DIA

DIA is a cross-chain, trustless oracle network that delivers verifiable price feeds for Fuse. DIA sources raw trade data directly from primary markets—more than 100 CEXs and DEXs—and computes prices on-chain, providing complete transparency from source to destination smart contract.

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Key features

  • Complete verifiability from data source to destination contract
  • Direct sourcing from 100+ primary markets with no intermediary
  • Support for 20,000+ assets across all major asset classes
  • Custom oracle configuration with tailored data sources and methodologies

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Data products

ProductDescription
Token Price FeedsReal-time market prices for assets across CEXs and DEXs
Fundamental FeedsFair value pricing, NAV, and Proof of Reserve data
RWA FeedsEquities, FX rates, commodities, and ETF prices
RandomnessVerifiable random number generation

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Getting started with DIA

Chainlink data feeds support for Fuse Network is planned. Check the Fuse ecosystem page for updates.
When choosing an oracle for production use, consider update frequency, data sources, deviation thresholds, and whether the feed covers the exact asset pair you need. Both Supra and DIA support custom configurations for specific requirements.

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