import { Config } from '../core/Config';
export declare class PaymentService {
    private config;
    private http;
    constructor(config: Config);
    /**
     * Check payment status using API key with a specific project ID.
     */
    checkWithApiKey(projectId: string | number, queryParams?: Record<string, any>): Promise<any>;
    /**
     * Check payment status using a license key (no project ID needed).
     *
     * IMPORTANT:
     * - This endpoint reads "action" and "include" from the query string.
     * - It accepts a JSON body (even if empty).
     */
    checkWithLicenseKey(queryParams?: Record<string, any>): Promise<any>;
}