export declare const FARM_CALLBACK_PREFIX = "afk:f:";
export declare const TELEGRAM_CALLBACK_DATA_MAX_BYTES = 64;
export type FarmCallbackAction = 'p' | 'd' | 'r' | 'x';
export interface ParsedFarmCallback {
    action: FarmCallbackAction;
    taskSlug: string;
}
export declare function parseFarmCallback(data: string | undefined | null): ParsedFarmCallback | null;
export declare function buildFarmCallback(action: FarmCallbackAction, taskSlug: string): string;