import { Port, Node, Connection } from '../../types/core';
import { NodeDefinition } from '../../types/NodeDefinition';
/**
 * Create a connection object based on port types.
 * Normalizes port order so that the connection is always from output to input.
 *
 * @param fromPort - First port (can be input or output)
 * @param toPort - Second port (can be input or output)
 * @returns Connection data with normalized from/to, or null if invalid pairing
 */
export declare function createConnection(fromPort: Port, toPort: Port): {
    fromNodeId: string;
    fromPortId: string;
    toNodeId: string;
    toPortId: string;
} | null;
/**
 * Create a connection only if valid according to connection validation rules.
 * Normalizes port order so that the connection is always from output to input.
 *
 * @param fromPort - First port (can be input or output)
 * @param toPort - Second port (can be input or output)
 * @param nodes - All nodes in the editor
 * @param connections - All existing connections
 * @param getNodeDefinition - Function to get node definition by type
 * @returns Connection data with normalized from/to, or null if invalid
 */
export declare function createValidatedConnection(fromPort: Port, toPort: Port, nodes: Record<string, Node>, connections: Record<string, Connection>, getNodeDefinition: (type: string) => NodeDefinition | undefined): {
    fromNodeId: string;
    fromPortId: string;
    toNodeId: string;
    toPortId: string;
} | null;