/**
 * 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 * as cL from '../Constants';
export declare class WsFrameEncoder {
    maxMessageSize: number;
    constructor(maxMessageSize?: number);
    readonly mask: (data: Buffer, maskKey: Buffer, offset: number) => void;
    bulkMask(data: Array<Buffer | string>, maskKey: Buffer): void;
    createHeader(opcode: cL.EOpcode, payloadSize: number, isFin: boolean, maskKey?: Buffer | number[] | null): Buffer;
}
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