class TppDataUploaderController implements TppDataUploaderRestApi {

    @Override
    public ResponseEntity<Map<String, String>> uploadTransactions(MultipartFile file) {
        log.info("uploading transactions");
        Map<String, String> response = transactionService.uploadUserTransaction(file);
        log.info("upload response contains {} errors", response.size());
        return ResponseEntity.ok(response);
    }

}