import { HexString } from './payloads.js';
/**
 * Validate that a number is a valid uint16 (0 to 65535)
 */
export declare function isValidUint16(value: number): boolean;
/**
 * Validate that a number is a valid uint32 (0 to 4294967295)
 */
export declare function isValidUint32(value: number): boolean;
/**
 * Validate that a number is a valid uint64 (0 to 18446744073709551615n)
 */
export declare function isValidUint64String(value: bigint | string): boolean;
/**
 * Validate that a string is a valid hex string
 */
export declare function isHexString(value: string): value is HexString;
/**
 * Universal assert function
 * @param condition
 * @param message
 */
export declare function assert(condition: boolean, message?: string): asserts condition;