// SPDX-License-Identifier: MIT
pragma solidity >=0.7.6 <0.9;

/**
 * Random number V2 long term support interface.
 */
interface RandomNumberV2Interface {
    /**
     * Returns the current random number, its timestamp and the flag indicating if it is secure.
     * @return _randomNumber The current random number.
     * @return _isSecureRandom The flag indicating if the random number is secure.
     * @return _randomTimestamp The timestamp of the random number.
     */
    function getRandomNumber()
        external
        view
        returns (
            uint256 _randomNumber,
            bool _isSecureRandom,
            uint256 _randomTimestamp
        );

    /**
     * Returns the historical random number for a given _votingRoundId,
     * its timestamp and the flag indicating if it is secure.
     * If no finalization in the _votingRoundId, the function reverts.
     * @param _votingRoundId The voting round id.
     * @return _randomNumber The current random number.
     * @return _isSecureRandom The flag indicating if the random number is secure.
     * @return _randomTimestamp The timestamp of the random number.
     */
    function getRandomNumberHistorical(
        uint256 _votingRoundId
    )
        external
        view
        returns (
            uint256 _randomNumber,
            bool _isSecureRandom,
            uint256 _randomTimestamp
        );
}