import { Message } from './message';
import { SharedBufferChannelMain, SharedBufferChannelWorker } from './channel-shared';
import { ServiceWorkerChannelMain, ServiceWorkerChannelWorker } from './channel-service';
import { WebROptions } from '../webr-main';
export interface ChannelMain {
    initialised: Promise<unknown>;
    close(): void;
    read(): Promise<Message>;
    flush(): Promise<Message[]>;
    write(msg: Message): void;
    request(msg: Message, transferables?: [Transferable]): Promise<any>;
    interrupt(): void;
}
export interface ChannelWorker {
    resolve(): void;
    write(msg: Message, transfer?: [Transferable]): void;
    read(): Message;
    handleInterrupt(): void;
    setInterrupt(interrupt: () => void): void;
    run(args: string[]): void;
    inputOrDispatch: () => number;
    setDispatchHandler: (dispatch: (msg: Message) => void) => void;
}
export declare const ChannelType: {
    readonly Automatic: 0;
    readonly SharedArrayBuffer: 1;
    readonly ServiceWorker: 2;
};
export declare type ChannelInitMessage = {
    type: string;
    data: {
        config: Required<WebROptions>;
        channelType: Exclude<typeof ChannelType[keyof typeof ChannelType], typeof ChannelType.Automatic>;
        clientId?: string;
        location?: string;
    };
};
export declare function newChannelMain(data: Required<WebROptions>): SharedBufferChannelMain | ServiceWorkerChannelMain;
export declare function newChannelWorker(msg: ChannelInitMessage): SharedBufferChannelWorker | ServiceWorkerChannelWorker;