/**
 * WebR communication channel messaging and request types.
 * @module Message
 */
import { PromiseHandles } from '../utils';
import { UUID } from './task-common';
/** A webR communication channel message. */
export interface Message {
    type: string;
    data?: any;
}
/** A webR communication channel request. */
export interface Request {
    type: 'request';
    data: {
        uuid: UUID;
        msg: Message;
    };
}
/** A webR communication channel event message. */
export interface EventMessage {
    type: 'event';
    data: {
        msg: Message;
    };
}
/** A webR communication channel response. */
export interface Response {
    type: 'response';
    data: {
        uuid: UUID;
        resp: Message;
    };
}
/** @internal */
export declare function newRequest(msg: Message, transferables?: [Transferable]): Request;
/** @internal */
export declare function newResponse(uuid: UUID, resp: Message, transferables?: [Transferable]): Response;
/** A webR communication channel `eval-response` message.
 * @internal
 */
export interface EvalResponse {
    type: 'eval-response';
    data: {
        result?: unknown;
        error?: string;
    };
}
/** A webR communication channel `proxyWebSocket` message.
 * @internal
 */
export interface ProxyWebSocketMessage {
    type: 'proxyWebSocket';
    data: {
        uuid: string;
        url: string;
        protocol?: string;
    };
}
/** A webR communication channel `sendWebSocket` message.
 * @internal
 */
export interface SendWebSocketMessage {
    type: 'sendWebSocket';
    data: {
        uuid: string;
        data: string | ArrayBufferLike | Blob | ArrayBufferView;
    };
}
/** A webR communication channel `closeWebSocket` message.
 * @internal
 */
export interface CloseWebSocketMessage {
    type: 'closeWebSocket';
    data: {
        uuid: string;
        code?: number;
        reason?: string;
    };
}
/** A webR communication channel `websocket-message` message.
 * @internal
 */
export interface WebSocketMessage {
    type: 'websocket-message';
    data: {
        uuid: string;
        data: string | ArrayBufferLike | Blob | ArrayBufferView;
    };
}
/** A webR communication channel `websocket-open` message.
 * @internal
 */
export interface WebSocketOpenMessage {
    type: 'websocket-open';
    data: {
        uuid: string;
    };
}
/** A webR communication channel `websocket-close` message.
 * @internal
 */
export interface WebSocketCloseMessage {
    type: 'websocket-close';
    data: {
        uuid: string;
        code?: number;
        reason?: string;
    };
}
/** A webR communication channel `proxyWorker` message.
 * @internal
 */
export interface ProxyWorkerMessage {
    type: 'proxyWorker';
    data: {
        uuid: string;
        url: string;
        options?: WorkerOptions;
    };
}
/** A webR communication channel `postMessageWorker` message.
 * @internal
 */
export interface PostMessageWorkerMessage {
    type: 'postMessageWorker';
    data: {
        uuid: string;
        data: unknown;
        async: boolean;
        transfer?: Transferable[];
        handles?: PromiseHandles<unknown>;
    };
}
/** A webR communication channel `terminateWorker` message.
 * @internal
 */
export interface TerminateWorkerMessage {
    type: 'terminateWorker';
    data: {
        uuid: string;
    };
}
/** A webR communication channel `worker-message` message.
 * @internal
 */
export interface WorkerMessage {
    type: 'worker-message';
    data: {
        uuid: string;
        data: any;
    };
}
/** A webR communication channel `worker-messageerror` message.
 * @internal
 */
export interface WorkerMessageErrorMessage {
    type: 'worker-messageerror';
    data: {
        uuid: string;
        data: any;
    };
}
/** A webR communication channel `worker-error` message.
 * @internal
 */
export interface WorkerErrorMessage {
    type: 'worker-error';
    data: {
        uuid: string;
    };
}
/** A webR communication channel sync-request.
 * @internal
 */
export interface SyncRequest {
    type: 'sync-request';
    data: {
        msg: Message;
        reqData: SyncRequestData;
    };
}
/** Transfer data required when using sync-request with SharedArrayBuffer.
 * @internal */
export interface SyncRequestData {
    taskId?: number;
    sizeBuffer: Int32Array;
    signalBuffer: Int32Array;
    dataBuffer: Uint8Array;
}
/** @internal */
export declare function newSyncRequest(msg: Message, data: SyncRequestData): SyncRequest;