import { DataPersistenceProvider } from '../common/interfaces.js';
import { Flow } from './flow.js';
import { Node, NodeOptions, SerializedNode } from './node.js';
import { Terminal } from './terminal.js';
export declare class TunnelNode extends Node {
    private tunnelType?;
    private _proxyTerminal?;
    get proxyTerminal(): Terminal | undefined;
    set proxyTerminal(terminal: Terminal);
    constructor(_flow: Flow, options: TunnelNodeOptions);
    setupIO(options: TunnelNodeOptions): void;
    created(): void;
    process(): void;
    serialize(persist?: DataPersistenceProvider): Promise<SerializedTunnelNode>;
}
export interface SerializedTunnelNode extends SerializedNode {
    tunnelType?: "input" | "output";
}
export interface TunnelNodeOptions extends NodeOptions {
    tunnelType?: "input" | "output";
    tunnelName?: string;
    tunnelDataType?: string;
}