// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0 <0.9.0;

import "../../libs/Witnet.sol";

interface IWitPriceFeedsLegacySolver {
    enum LatestUpdateStatus {
        Void,
        Awaiting,
        Ready,
        Error
    }
    struct Price {
        uint64 value;
        Witnet.Timestamp timestamp;
        Witnet.TransactionHash drTxHash;
        LatestUpdateStatus latestStatus;
    }
    function class() external pure returns (string memory);
    function delegator() external view returns (address);
    function solve(bytes4 feedId) external view returns (Price memory);
    function specs() external pure returns (bytes4);
    function validate(bytes4 feedId, string[] calldata initdata) external;
}