/**
 * Safely stringify data that may contain BigInt values
 * BigInt values are converted to objects with a special marker
 */
export declare function stringifyWithBigInt(data: any): string;
/**
 * Parse JSON and restore BigInt values
 * Objects with __type: 'bigint' are converted back to BigInt
 */
export declare function parseWithBigInt(json: string): any;
