// SPDX-License-Identifier: MIT
pragma solidity ^0.8.23;

// interfaces

// libraries

// contracts

interface IOwnablePendingBase {
    /// @notice Thrown when the caller is not the pending owner.
    error OwnablePending_NotPendingOwner(address account);

    /**
     * @notice Emitted when ownership transfer is started.
     * @dev Finalized with {acceptOwnership}.
     */
    event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);
}

interface IOwnablePending is IOwnablePendingBase {
    /**
     * @notice Initialize a transfer of ownership.
     * @param newOwner The address of the new owner.
     */
    function startTransferOwnership(address newOwner) external;

    /**
     * @notice The new owner accepts the ownership transfer.
     */
    function acceptOwnership() external;

    /**
     * @notice Returns the address of the current owner.
     * @return address of the current owner.
     */
    function currentOwner() external view returns (address);

    /**
     * @notice Returns the address of the pending owner, if there is one.
     * @return address of the pending owner.
     */
    function pendingOwner() external view returns (address);
}