/// <reference types="node" />
import Api from './api';
export declare class Media {
    private readonly api;
    private readonly url;
    constructor(api: Api);
    /**
     * Upload binary data (images, documents etc) to the server. After uploading you can send media to WhatsApp using id of the uploaded data
     * @param data binary data to upload
     * @param fileExtension extension of upladed data that will be assign to media message in WhatsApp.
     */
    uploadMedia(data: Buffer, fileExtension: string): Promise<string>;
}