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

/**
 * Fdc2RequestFeeConfigurations interface.
 */
interface IFdc2RequestFeeConfigurations {
    // Event emitted when a type and source price is set.
    event TypeAndSourceFeeSet(
        bytes32 indexed attestationType,
        bytes32 indexed source,
        uint256 fee
    );
    // Event emitted when a type and source price is removed.
    event TypeAndSourceFeeRemoved(
        bytes32 indexed attestationType,
        bytes32 indexed source
    );

    error FeeMustBeGreaterThanZero();
    error FeeNotSet();
    error TypeAndSourceCombinationNotSupported();
    error LengthsMismatch();

    /**
     * Method to get the base fee for a type and source pair. It reverts if the pair is not supported.
     * @param _type The type of the attestation.
     * @param _source The source of the attestation.
     * @return The fee for the type and source pair.
     */
    function getTypeAndSourceFee(
        bytes32 _type,
        bytes32 _source
    ) external view returns (uint256);
}