export declare const MESSAGE_TYPE: {
    readonly INIT_REQUEST: "FILING_INIT_REQUEST";
    readonly INIT_RESPONSE: "FILING_INIT_RESPONSE";
    readonly EXTRACT_REQUEST: "FILING_EXTRACT_REQUEST";
    readonly EXTRACT_RESPONSE: "FILING_EXTRACT_RESPONSE";
};
export interface MessageData<T = any> {
    id: string;
    payload: T;
    type: typeof MESSAGE_TYPE[keyof typeof MESSAGE_TYPE];
}