IOracle.sol

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.13;

import "@equilibria/root/attribute/interfaces/IInstance.sol";
import "@equilibria/perennial-v2/contracts/interfaces/IOracleProvider.sol";

interface IOracle is IOracleProvider, IInstance {
    error OracleOutOfSyncError();
    error OracleOutOfOrderCommitError();

    event OracleUpdated(IOracleProvider newProvider);

    /// @dev The state for a single epoch
    struct Epoch {
        /// @dev The oracle provider for this epoch
        IOracleProvider provider;

        /// @dev The last timestamp that this oracle provider is valid
        uint96 timestamp;
    }

    /// @dev The global state for oracle
    struct Global {
        /// @dev The current epoch
        uint128 current;

        /// @dev The latest epoch
        uint128 latest;
    }

    function initialize(IOracleProvider initialProvider) external;
    function update(IOracleProvider newProvider) external;
}