import type { TwitchContext } from './TwitchContext';
import type { EventSubConnection } from '../enums';
/**
 * Base class for building custom permissions.
 */
export declare abstract class BasePermission<T extends EventSubConnection> {
    /**
     * Check if the user has the custom permission to run the command.
     * @param ctx The context of the command which was run.
     * @returns If the user has the custom permission to run the command.
     */
    abstract check(ctx: TwitchContext<{}, T>): Promise<boolean> | boolean;
    /**
     * The value or identifier of the custom permission returned in `onPermissionsFallback`. See {@link Command}.
     */
    abstract value: string;
}