import { Request } from './request/Request';
import { IViberApi, IViberGetUserDetails, IViberParams, IViberRichMediaParams, IViberSender, IViberWebhookParams } from './interfaces';
import { IViberButton } from '../components/button/interfaces';
export declare class ViberRequest {
    private readonly API_ENDPOINT;
    protected _request: Request;
    protected _error: string | null;
    token: string | null;
    constructor();
    initToken(token: string): void;
    call<T extends IViberApi>(method: string): Promise<T | null>;
    getUserDetails(id: string): Promise<IViberGetUserDetails | null>;
    sendMessage(receiver: string, sender: IViberSender | string, text: string, params?: IViberParams | null): Promise<IViberApi | null>;
    setWebhook(url: string, params?: IViberWebhookParams | null): Promise<IViberApi | null>;
    richMedia(receiver: string, richMedia: IViberButton[], params?: IViberRichMediaParams | null): Promise<IViberApi | null>;
    sendFile(receiver: string, file: string, params?: IViberParams | null): Promise<IViberApi | null> | null;
    protected _log(error?: string): void;
}