service/kv_service/py_verificator.cpp

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 * Copyright (c) 2019 The Pybind Development Team. All rights reserved.
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#include "service/kv_service/py_verificator.h"

#include <glog/logging.h>
#include <pybind11/embed.h>

namespace py = pybind11;
using namespace py::literals;

namespace sdk {

PYVerificator::PYVerificator() {
  py::initialize_interpreter();
  py::exec(R"(
      import json
    )");
}

PYVerificator::~PYVerificator() { py::finalize_interpreter(); }

// Validate transactions committed by the Python SDK
bool PYVerificator::Validate(const std::string &transaction) {
  auto locals = py::dict("transaction"_a = transaction);

  py::exec(R"(
    from service.sdk_validator.validator import is_valid_tx

    try:
      txn_dict = json.loads(transaction)
      ret = is_valid_tx(txn_dict)
      is_valid = ret[0] == 0
    except (KeyError, AttributeError, ValueError):
      is_valid = False
  )",
           py::globals(), locals);

  return locals["is_valid"].cast<bool>();
}

} // namespace sdk