import { IncomingMessage } from "node:http";
/**
 * Result of successful authentication
 */
export interface AuthResult {
    /**
     * User or token data from authentication
     */
    data?: Record<string, unknown>;
}
/**
 * Base interface for authentication providers
 */
export interface AuthProvider {
    /**
     * Authenticate an incoming request
     * @param req The incoming HTTP request
     * @returns Promise resolving to boolean or AuthResult
     */
    authenticate(req: IncomingMessage): Promise<boolean | AuthResult>;
    /**
     * Get error details for failed authentication
     */
    getAuthError?(): {
        status: number;
        message: string;
    };
}
/**
 * Authentication configuration for transport
 */
export interface AuthConfig {
    /**
     * Authentication provider implementation
     */
    provider: AuthProvider;
    /**
     * Per-endpoint authentication configuration
     */
    endpoints?: {
        /**
         * Whether to authenticate SSE connection endpoint
         * @default false
         */
        sse?: boolean;
        /**
         * Whether to authenticate message endpoint
         * @default true
         */
        messages?: boolean;
    };
}
/**
 * Default authentication error
 */
export declare const DEFAULT_AUTH_ERROR: {
    status: number;
    message: string;
};