import { ResourceNode } from "@chip-in/resource-node";
import { TransactionObject } from "../db/Transaction";
export declare class Util {
    static promiseWhile<T>(data: T, condition: (data: T) => boolean, action: (data: T) => Promise<T>): Promise<T>;
    static promiseEach<T>(list: T[], action: (data: T) => Promise<any>): Promise<any>;
    static mongoSearch(documents: any[], query: object, sort?: any, validate?: boolean): any;
    static fetchJournal(csn: number, database: string, node: ResourceNode, subset?: string): Promise<TransactionObject | null>;
    static fetchJournals(fromCsn: number, toCsn: number, database: string, node: ResourceNode, callback: (obj: TransactionObject) => Promise<void>, subset?: string): Promise<void>;
    static diff(lhs: object, rhs: object): object[];
    static project(data: any, projection?: any): object;
}