import { AngularFireDatabase } from '@angular/fire/database';
import { Option } from '../../classes';
export declare class TransactionService {
    private db;
    constructor(db: AngularFireDatabase);
    fromAToB(refOrPath: string | firebase.database.Reference, from?: number | string | boolean, to?: number | string | boolean): Promise<any>;
    set(refOrPath: string | firebase.database.Reference, value: any): Promise<any>;
    getReplyRef(survey_id: string): firebase.database.Reference;
    getAgainstQuotaRef(option: Option): firebase.database.Reference;
    getCheckRef(option: Option, as: string): firebase.database.Reference;
    getConcurrencyRef(s_id: string, as: string): firebase.database.Reference;
}