/**
 * Options for TimestampTransform decorator.
 */
type TimestampTransformOptions = {
    default?: number;
    min?: number;
    max?: number;
    roundTo?: 'ms' | 's' | 'm' | 'h' | 'd';
};
/**
 * Property decorator to convert values to timestamps with optional clamping and unit rounding.
 *
 * @param {TimestampTransformOptions} opts - Configuration options for rounding and constraints.
 * @returns {PropertyDecorator} - Transforms values into sanitized timestamps.
 */
export declare function TimestampTransform(opts?: TimestampTransformOptions): PropertyDecorator;
export {};