diff --git a/oss-internship-2020/jsonnet/examples/CMakeLists.txt b/oss-internship-2020/jsonnet/examples/CMakeLists.txt
index 4044288..fcfab56 100644
--- a/oss-internship-2020/jsonnet/examples/CMakeLists.txt
+++ b/oss-internship-2020/jsonnet/examples/CMakeLists.txt
@@ -50,3 +50,15 @@ foreach(exe base multiple_files yaml_stream formatter)
     sapi::sapi
   )
 endforeach()
+
+add_executable(jsonnet_base_transaction
+  jsonnet_base_transaction.cc
+  jsonnet_base_transaction.h
+)
+
+target_link_libraries(jsonnet_base_transaction PRIVATE
+    libjsonnet
+    jsonnet_helper
+    jsonnet_sapi
+    sapi::sapi
+  )
\ No newline at end of file
diff --git a/oss-internship-2020/jsonnet/examples/jsonnet_base_example.cc b/oss-internship-2020/jsonnet/examples/jsonnet_base_example.cc
index 317dd8e..4039df0 100644
--- a/oss-internship-2020/jsonnet/examples/jsonnet_base_example.cc
+++ b/oss-internship-2020/jsonnet/examples/jsonnet_base_example.cc
@@ -50,7 +50,7 @@ class JsonnetSapiSandbox : public JsonnetSandbox {
   std::string out_file_;
 };
 
-int main(int argc, char *argv[]) {
+int main(int argc, char* argv[]) {
   google::InitGoogleLogging(argv[0]);
   gflags::ParseCommandLineFlags(&argc, &argv, true);
 
diff --git a/oss-internship-2020/jsonnet/examples/jsonnet_base_transaction.cc b/oss-internship-2020/jsonnet/examples/jsonnet_base_transaction.cc
index 382611d..85c9099 100644
--- a/oss-internship-2020/jsonnet/examples/jsonnet_base_transaction.cc
+++ b/oss-internship-2020/jsonnet/examples/jsonnet_base_transaction.cc
@@ -18,33 +18,61 @@ absl::Status JsonnetTransaction::Main() {
 
   JsonnetApi api(sandbox());
 
+  // Initialize library's main structure.
   SAPI_ASSIGN_OR_RETURN(JsonnetVm* jsonnet_vm, api.c_jsonnet_make());
   sapi::v::RemotePtr vm_pointer(jsonnet_vm);
 
+  // Read input file.
   std::string in_file_in_sandboxee(std::string("/input/") +
                                    basename(&in_file_[0]));
   sapi::v::ConstCStr in_file_var(in_file_in_sandboxee.c_str());
-
   SAPI_ASSIGN_OR_RETURN(char* input, api.c_read_input(false, in_file_var.PtrBefore()));
 
+  // Process jsonnet data.
   sapi::v::RemotePtr input_pointer(input);
   sapi::v::Int error;
   SAPI_ASSIGN_OR_RETURN(char* output, api.c_jsonnet_evaluate_snippet(&vm_pointer, in_file_var.PtrBefore(), &input_pointer, error.PtrAfter()));
-  TRANSACTION_FAIL_IF_NOT(error.GetValue() != 0, "Jsonnet code evaluation failed.");
+  TRANSACTION_FAIL_IF_NOT(error.GetValue() == 0, "Jsonnet code evaluation failed.");
 
+  // Write data to file.
   std::string out_file_in_sandboxee(std::string("/output/") +
                                     basename(&out_file_[0]));
   sapi::v::ConstCStr out_file_var(out_file_in_sandboxee.c_str());
   sapi::v::RemotePtr output_pointer(output);
-
   SAPI_ASSIGN_OR_RETURN(bool success, api.c_write_output_file(&output_pointer, out_file_var.PtrBefore()));
   TRANSACTION_FAIL_IF_NOT(success, "Writing to output file failed.");
 
+  // Clean up.
   SAPI_ASSIGN_OR_RETURN(char* result, api.c_jsonnet_realloc(&vm_pointer, &output_pointer, 0));
 
   SAPI_RETURN_IF_ERROR(api.c_jsonnet_destroy(&vm_pointer));
   SAPI_RETURN_IF_ERROR(api.c_free_input(&input_pointer));
 
-
   return absl::OkStatus();
-}
\ No newline at end of file
+}
+
+
+int main(int argc, char* argv[]) {
+  google::InitGoogleLogging(argv[0]);
+  gflags::ParseCommandLineFlags(&argc, &argv, true);
+
+  if (!(argc == 3)) {
+    std::cerr << "Usage:\n"
+              << basename(argv[0]) << " absolute/path/to/INPUT.jsonnet"
+              << " absolute/path/to/OUTPUT\n";
+    return EXIT_FAILURE;
+  }
+
+  std::string in_file(argv[1]);
+  std::string out_file(argv[2]);
+
+  JsonnetTransaction jsonnet_transaction(in_file, out_file);
+
+  auto result = jsonnet_transaction.Run();
+
+  LOG(INFO) << "Transaction result: " << result.message();
+  CHECK(result.ok());
+
+  return EXIT_SUCCESS;
+
+}
diff --git a/oss-internship-2020/jsonnet/examples/jsonnet_base_transaction.h b/oss-internship-2020/jsonnet/examples/jsonnet_base_transaction.h
index ff1ed41..5e81adf 100644
--- a/oss-internship-2020/jsonnet/examples/jsonnet_base_transaction.h
+++ b/oss-internship-2020/jsonnet/examples/jsonnet_base_transaction.h
@@ -17,6 +17,7 @@
 
 #include "sandboxed_api/transaction.h"
 #include "sandboxed_api/vars.h"
+#include "sandboxed_api/util/flag.h"
 
 #include "jsonnet_sapi.sapi.h"
 
diff --git a/oss-internship-2020/jsonnet/examples/jsonnet_formatter_example.cc b/oss-internship-2020/jsonnet/examples/jsonnet_formatter_example.cc
index ad73eca..305059a 100644
--- a/oss-internship-2020/jsonnet/examples/jsonnet_formatter_example.cc
+++ b/oss-internship-2020/jsonnet/examples/jsonnet_formatter_example.cc
@@ -50,7 +50,7 @@ class JsonnetSapiSandbox : public JsonnetSandbox {
   std::string out_file_;
 };
 
-int main(int argc, char *argv[]) {
+int main(int argc, char* argv[]) {
   google::InitGoogleLogging(argv[0]);
   gflags::ParseCommandLineFlags(&argc, &argv, true);
 
diff --git a/oss-internship-2020/jsonnet/examples/jsonnet_multiple_files_example.cc b/oss-internship-2020/jsonnet/examples/jsonnet_multiple_files_example.cc
index f785445..9d2783e 100644
--- a/oss-internship-2020/jsonnet/examples/jsonnet_multiple_files_example.cc
+++ b/oss-internship-2020/jsonnet/examples/jsonnet_multiple_files_example.cc
@@ -52,7 +52,7 @@ class JsonnetSapiSandbox : public JsonnetSandbox {
   std::string out_directory_;
 };
 
-int main(int argc, char *argv[]) {
+int main(int argc, char* argv[]) {
   google::InitGoogleLogging(argv[0]);
   gflags::ParseCommandLineFlags(&argc, &argv, true);
 
diff --git a/oss-internship-2020/jsonnet/examples/jsonnet_yaml_stream_example.cc b/oss-internship-2020/jsonnet/examples/jsonnet_yaml_stream_example.cc
index db4f036..8f8e607 100644
--- a/oss-internship-2020/jsonnet/examples/jsonnet_yaml_stream_example.cc
+++ b/oss-internship-2020/jsonnet/examples/jsonnet_yaml_stream_example.cc
@@ -50,7 +50,7 @@ class JsonnetSapiSandbox : public JsonnetSandbox {
   std::string out_file_;
 };
 
-int main(int argc, char *argv[]) {
+int main(int argc, char* argv[]) {
   google::InitGoogleLogging(argv[0]);
   gflags::ParseCommandLineFlags(&argc, &argv, true);