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Oracles provide smart contracts with off-chain data such as asset prices. Chaos Labs operates price feeds on Stable.

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Overview table

ProviderCategorySupported PairsDocs / Get StartedNotes
Chaos LabsOracle Price FeedsBTC/USD, ETH/USD, SOL/USD, FRXUSD/USD, SFRXUSD/USD, ezETH/ETHhttps://docs.chaoslabs.xyz/oracles/docsLive on mainnet and testnet

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Chaos Labs

Chaos Labs provides oracle price feeds on Stable. Feed contracts expose the IEdgePushOracle interface documented in the Chaos Labs EVM integration guide. Capabilities
  • Push-based price feeds with configurable deviation thresholds and heartbeat intervals
  • IEdgePushOracle interface with latestRoundData(), decimals(), and description()
  • On-chain price data for DeFi protocols, lending, and liquidation engines

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Mainnet price feed addresses

Source: Chaos Labs push feeds dashboard
Price FeedContract AddressDeviationHeartbeat
FRXUSD / USD0xAe48F22903d43f13f66Cc650F57Bd4654ac222cb0.05%8m
ezETH / ETH0x45D531E6BB4eF640BF4bFc1DDE832e1EDFFea8a50.05%8m
SFRXUSD / USD0x955998975cFDAFD0e0dc60f5A92E14fA72384AaE0.05%8m
ETH / USD0x163131609562E578754aF12E998635BfCa56712C0.5%47m
BTC / USD0x9f6aA2aB14bFF53e4b79A81ce1554F1DFdbb66080.5%45m

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Testnet price feed addresses

Price FeedContract Address
BTC / USD0xECA49340544541957eC64B7635418D2159616826
ETH / USD0x176A9536feaC0340de9f9811f5272E39E80b424f
SOL / USD0x7fa367967CE7903Fc5cE25a969cb7dB792a8f6b9

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Reading a price feed

Feed contracts implement IEdgePushOracle. The following example is adapted from the Chaos Labs documentation. 
pragma solidity ^0.8.25;

interface IEdgePushOracle {
    function latestRoundData()
        external
        view
        returns (
            uint80 roundId,
            int256 answer,
            uint256 startedAt,
            uint256 updatedAt,
            uint80 answeredInRound
        );
    function decimals() external view returns (uint8);
    function description() external view returns (string memory);
}

contract OracleConsumer {
    IEdgePushOracle public oracle;

    constructor(address oracleAddress) {
        oracle = IEdgePushOracle(oracleAddress);
    }

    function getLatestPriceData()
        external
        view
        returns (
            uint80 roundId,
            int256 answer,
            uint256 updatedAt
        )
    {
        (roundId, answer, , updatedAt, ) = oracle.latestRoundData();
        return (roundId, answer, updatedAt);
    }
}
This code is from the Chaos Labs documentation and is provided for illustrative purposes. Test thoroughly before production use.

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Deploying to Stable Testnet

This assumes you have Foundry installed and a funded wallet. See the Deploy Smart Contract tutorial for full setup instructions.
  1. Save the contract above to src/OracleConsumer.sol in a Foundry project.
  2. Deploy with the ETH/USD testnet feed address: 
source .env ;
forge create src/OracleConsumer.sol:OracleConsumer --broadcast --rpc-url $STABLE_TESTNET_RPC_URL --private-key $PRIVATE_KEY --constructor-args 0x176A9536feaC0340de9f9811f5272E39E80b424f
  1. Read the latest price from your deployed contract:
cast call <DEPLOYED_ADDRESS> "getLatestPriceData()(uint80,int256,uint256)" --rpc-url $STABLE_TESTNET_RPC_URL

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Last modified on April 23, 2026