import { Observable } from 'rxjs';
import * as i0 from "@angular/core";
export declare class MainCurrencyService {
    readonly DEFAULT_MAIN_CURRENCY: string;
    storageSrv: Storage;
    static readonly STORAGE_KEY = "gm_main_currency";
    private _value;
    private _onChange;
    get(): string;
    set(code: string, options?: {
        save: boolean;
    }): void;
    connect(): Observable<string>;
    static ɵfac: i0.ɵɵFactoryDeclaration<MainCurrencyService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<MainCurrencyService>;
}