// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { Attestation } from "../Common.sol";

/**
 * @title The interface of an optional schema resolver.
 */
interface ISchemaResolver {
    /**
     * @dev Returns whether the resolver supports ETH transfers.
     */
    function isPayable() external pure returns (bool);

    /**
     * @dev Processes an attestation and verifies whether it's valid.
     *
     * @param attestation The new attestation.
     *
     * @return Whether the attestation is valid.
     */
    function attest(Attestation calldata attestation) external payable returns (bool);

    /**
     * @dev Processes multiple attestations and verifies whether they are valid.
     *
     * @param attestations The new attestations.
     * @param values Explicit ETH amounts which were sent with each attestation.
     *
     * @return Whether all the attestations are valid.
     */
    function multiAttest(
        Attestation[] calldata attestations,
        uint256[] calldata values
    ) external payable returns (bool);

    /**
     * @dev Processes an attestation revocation and verifies if it can be revoked.
     *
     * @param attestation The existing attestation to be revoked.
     *
     * @return Whether the attestation can be revoked.
     */
    function revoke(Attestation calldata attestation) external payable returns (bool);

    /**
     * @dev Processes revocation of multiple attestation and verifies they can be revoked.
     *
     * @param attestations The existing attestations to be revoked.
     * @param values Explicit ETH amounts which were sent with each revocation.
     *
     * @return Whether the attestations can be revoked.
     */
    function multiRevoke(
        Attestation[] calldata attestations,
        uint256[] calldata values
    ) external payable returns (bool);
}
