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

import "@equilibria/root/number/types/Fixed18.sol";
import "@equilibria/perennial-oracle/contracts/interfaces/IOracleProvider.sol";
import "./types/PayoffDefinition.sol";

interface IPayoffProvider {
    event OracleUpdated(address newOracle, uint256 oracleVersion);

    error PayoffProviderInvalidOracle();
    error PayoffProviderInvalidPayoffDefinitionError();

    function oracle() external view returns (IOracleProvider);
    function payoffDefinition() external view returns (PayoffDefinition memory);
    function currentVersion() external view returns (IOracleProvider.OracleVersion memory);
    function atVersion(uint256 oracleVersion) external view returns (IOracleProvider.OracleVersion memory);
}