/**
 * Validation utilities for chip amounts and other game values
 */
/**
 * Validate that a chip amount is a non-negative integer
 * Prevents fractional chips and negative amounts
 *
 * @param amount The chip amount to validate
 * @param context Description of what this amount represents (for error messages)
 * @throws IllegalActionError if amount is invalid
 */
export declare function validateChipAmount(amount: number, context: string): void;
/**
 * Validate that a timestamp is valid and not in the future
 *
 * @param timestamp The timestamp to validate
 * @param previousTimestamp The previous action's timestamp (for monotonic check)
 * @throws IllegalActionError if timestamp is invalid
 */
export declare function validateTimestamp(timestamp: number, previousTimestamp?: number): void;