/**
 * Copyright 2025 Angus.Fenying <fenying@litert.org>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import type * as $Net from 'node:net';
import { Writable, WritableOptions } from 'node:stream';
import type * as dL from '../Decl';
import * as cL from '../Constants';
export declare class WsFrameWriter {
    private readonly _encoder;
    maskKey: Buffer | boolean;
    protected _socket: $Net.Socket | null;
    constructor(socket?: $Net.Socket | null);
    setSocket(socket: $Net.Socket): void;
    /**
     * Build and write a WebSocket frame
     *
     * @param opcode    The opcode of the frame
     * @param isFin     Is this the final frame?
     * @param payload   The payload of the frame
     * @param callback  A callback to be called when the frame is written
     *
     * @returns Return false if the socket buffer is full, needs to wait for draining.
     */
    writeArray(opcode: cL.EOpcode, isFin: boolean, payload: Array<Buffer | string>, callback: dL.IErrorCallback): boolean;
    /**
     * Build and write a WebSocket frame
     *
     * @param opcode    The opcode of the frame
     * @param isFin     Is this the final frame?
     * @param payload   The payload of the frame
     * @param callback  A callback to be called when the frame is written
     *
     * @returns Return false if the socket buffer is full, needs to wait for draining.
     */
    write(opcode: cL.EOpcode, isFin: boolean, payload: Buffer | string, callback: dL.IErrorCallback): boolean;
}
export declare class WsMessageWriter extends Writable implements dL.IMessageWriter {
    readonly opcode: cL.EOpcode;
    readonly maxMessageSize: number;
    protected readonly _writer: WsFrameWriter;
    private _sentBytes;
    constructor(opcode: cL.EOpcode, maxMessageSize: number, _writer: WsFrameWriter, opts?: WritableOptions);
    _write(chunk: Buffer | string, _encoding: BufferEncoding, callback: dL.IErrorCallback): void;
    _final(callback: dL.IErrorCallback): void;
}
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