import type { Server } from 'node:http';
import type { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js';
import { SSEServerTransport } from '@modelcontextprotocol/sdk/server/sse.js';
import express, { type Response } from 'express';
import type { McpTransport, WalletMode } from './types.js';
export type McpServerFactory = () => Promise<McpServer>;
export type SseServerTransportFactory = (endpoint: string, response: Response) => SSEServerTransport;
export type SseListenFactory = (app: express.Application, port: number, host: string) => Server;
export declare const DEFAULT_MAX_SSE_SESSIONS = 100;
export interface HttpSseTransportOptions {
    port: number;
    host: string;
    path: string;
    walletMode?: WalletMode;
    maxSessions?: number;
}
export interface HttpSseTransportDependencies {
    serverFactory?: McpServerFactory;
    transportFactory?: SseServerTransportFactory;
    listenFactory?: SseListenFactory;
}
export declare class HttpSseTransport implements McpTransport {
    readonly mode: "http-sse";
    private readonly app;
    private httpServer;
    private readonly connections;
    private readonly sockets;
    private state;
    private startPromise;
    private stopPromise;
    private rejectStartup;
    private cleanupStartupListeners;
    private runtimeErrorHandler;
    private connectionHandler;
    private activeSessionSlots;
    private readonly port;
    private readonly host;
    private readonly path;
    private readonly walletMode;
    private readonly serverFactory;
    private readonly transportFactory;
    private readonly listenFactory;
    private readonly maxSessions;
    constructor(options: HttpSseTransportOptions, dependencies?: HttpSseTransportDependencies);
    private setupMiddleware;
    private setupRoutes;
    private closeDetachedSession;
    private closeSession;
    getListeningPort(): number | undefined;
    start(_server?: McpServer): Promise<void>;
    stop(): Promise<void>;
}