export declare function validateAbsolutePath(path: string, paramName: string): string | null;
export declare function writeFileCreatingParents(targetPath: string, data: Buffer): Promise<void>;
export declare function validateUploadFile(filePath: string): Promise<{
    ok: true;
    size: number;
} | {
    ok: false;
    error: string;
}>;
export declare function readFileForUpload(filePath: string): Promise<Buffer>;
export declare function defaultFileName(filePath: string): string;
//# sourceMappingURL=fileIO.d.ts.map