/// <reference types="node" />
import Connection from '../helper/connection';
/**
 * The ObfsMethod class is an abstract class that all other,
 * extended classes should implement its methods and properties
 * every obfuscation method should extend this class
 */
declare abstract class ObfsMethod {
    static readonly CLIENT = "CLIENT";
    static readonly SERVER = "SERVER";
    /**
     * The type of obfuscation
     */
    type: typeof ObfsMethod.CLIENT | typeof ObfsMethod.SERVER;
    /**
     * Connection object
     */
    protected connection: Connection;
    /**
     * The Obfuscation method name
     */
    abstract name: string;
    constructor(connection: Connection, type: typeof ObfsMethod.CLIENT | typeof ObfsMethod.SERVER);
    /**
     * Checks if the message format is Appropriate with
     * this obfuscation method
     * @param message - The incoming message
     */
    abstract check(message: Buffer): boolean;
    /**
     * Begins the handshake process for the encryption
     * @param callback - Emitted after the handshake process
     */
    abstract handshake(callback: () => void): void;
    /**
     * DeObfuscates the obfuscated message
     * @param message - The obfuscated message
     */
    abstract deObfuscate(message: Buffer): Buffer;
    /**
     * Obfuscates the non-obfuscated message
     * @param message - The non-obfuscated message
     */
    abstract obfuscate(message: Buffer): Buffer;
}
export type ObfsBuilder = (connection: Connection, type?: typeof ObfsMethod.CLIENT | typeof ObfsMethod.SERVER) => ObfsMethod;
export default ObfsMethod;