import { IDb } from "./container/IDb";
export declare class SystemDb {
    private db;
    private isNewDb;
    private isFirstCsnAccess;
    private queryHash;
    private csn?;
    constructor(db: IDb);
    isNew(): boolean;
    start(): Promise<void>;
    startTransaction(): Promise<any>;
    commitTransaction(session: any): Promise<void>;
    abortTransaction(session: any): Promise<void>;
    checkQueryHash(hash: string): Promise<boolean>;
    updateQueryHash(session?: any): Promise<void>;
    private prepareCsn;
    /**
     * get current CSN
     */
    getCsn(): Promise<number>;
    _getCsn(): number;
    updateCsn(seq: number, session?: any): Promise<void>;
}