export declare enum MESSAGE_EVENT_TYPE {
    PAYMENT_CLOSE = "payment_close",
    PAYMENT_SUCCESS = "payment_success",
    PAYMENT_ERROR = "payment_error",
    SYNC_HEIGHT = "sync_height"
}
interface TokenPayload {
    'license-toggles': {
        [key: string]: boolean;
    };
    'plan-name': string;
    'plan-usage': string;
    'plan-variant': string;
    aud: string;
    exp: number;
    iat: number;
    iss: string;
    nbf: number;
    swemp: string;
}
type Flow = {
    subscribe: (eventType: MESSAGE_EVENT_TYPE, callback: () => void) => {
        unsubscribe: () => void;
    };
};
export declare const addPaymentIframe: (el: HTMLElement, baseUrl: string, options: {
    shopUrl: string;
    swVersion: string;
    swUserLanguage: string;
    shopPlan?: string;
}) => Promise<{
    iframeEl: HTMLIFrameElement;
    unmount: () => void;
}>;
export declare const startPaymentFlow: () => Promise<Flow>;
export declare const decodeLicense: () => Promise<TokenPayload | null>;
export {};