import type { Request } from 'express';
export interface MultipartOptions {
    /** Maximum file size in bytes */
    maxFileSize?: number;
    /** Allowed MIME types for file uploads */
    allowedMimeTypes?: string[];
}
/**
 * Parse multipart/form-data using @fastify/busboy.
 * Converts file uploads to Buffers and parses JSON field values.
 *
 * This matches the behavior of the Express adapter's parseMultipartFormData().
 *
 * @param request - The Express request object
 * @param options - Multipart parsing options
 */
export declare function parseMultipartFormData(request: Request, options?: MultipartOptions): Promise<Record<string, unknown>>;
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