import { Datastore } from '@google-cloud/datastore';
import { Model } from 'gstore-node';
import { AsyncResponse } from './async-response.type';
import { getSlugId } from './helpers';
export declare class EntitySlug {
    private namespace;
    private projectId;
    private keyFilename;
    modelName: string;
    private validatorFn?;
    private datastore;
    private gstore;
    private slugModel;
    getSlugId: typeof getSlugId;
    constructor(namespace: string, projectId: string, keyFilename: string, modelName: string, validatorFn?: ((slug: string) => string | false) | undefined);
    getDatastore(): Datastore;
    getSlugModel(): Model<any>;
    reserveSlug(entityId: string, slug: string): AsyncResponse<{
        slug?: string;
        entityId?: string;
    }>;
    getEntityId(slug: string): AsyncResponse<string | null>;
    deleteSlug(slug: string): AsyncResponse<boolean>;
    private validateSlug;
}