import { IDatabaseMigrationHandler, ISchemaVersion } from "migration-script-runner";
import { database } from "firebase-admin";
import { AppConfig, BackupService } from "../index";
export declare class FirebaseHandler implements IDatabaseMigrationHandler {
    cfg: AppConfig;
    db: database.Database;
    backup: BackupService;
    schemaVersion: ISchemaVersion;
    private constructor();
    static getInstance(cfg: AppConfig): Promise<FirebaseHandler>;
    getName(): string;
}