/// <reference types="node" />
export declare function isStunMessage($buffer: Buffer): boolean;
export declare function numberToBinaryStringArray(num: number, digit?: number): string[];
export declare function methodAndClassToMessageType([method, klass]: [number, number]): number;
export declare function calcPaddingByte(curByte: number, boundaryByte: number): number;
export declare function writeAttrBuffer(type: number, $value: Buffer): Buffer;
export declare function generateFingerprint($msg: Buffer): Buffer;
export declare function generateIntegrity($msg: Buffer, integrityKey: string): Buffer;
export declare function generateIntegrityWithFingerprint($msg: Buffer, integrityKey: string): Buffer;