import { BrandedInterfaceDefinition } from '@digitaldefiance/branded-interface';
import type { NextFunction, Request, Response } from 'express';
/**
 * Express middleware factory that validates the request body against a
 * BrandedInterfaceDefinition using safeParseInterface().
 *
 * On success: attaches the branded instance to `req.brandedBody` and calls `next()`.
 * On failure: responds with HTTP 400 and a JSON error body.
 *
 * Requirements: 6.1, 6.2, 6.3, 6.4, 6.5
 */
export declare function validateBody<T extends Record<string, unknown>>(definition: BrandedInterfaceDefinition<T>): (req: Request, res: Response, next: NextFunction) => void;
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