import type { RequestHandler } from 'express';
import type { TransportMode, WalletMode } from './types.js';
/**
 * Creates CORS middleware with secure defaults.
 * By default, no CORS headers are set (same-origin only).
 */
export declare function createCorsMiddleware(): RequestHandler;
/**
 * Validates that wallet mode is not used with HTTP transports
 * Exits the process if unsafe configuration detected
 */
export declare function validateSecurityConfig(transportMode: TransportMode, walletMode: WalletMode): void;