diff --git a/src/TugUtils.hpp b/src/TugUtils.hpp
new file mode 100644
index 0000000..225f743
--- /dev/null
+++ b/src/TugUtils.hpp
@@ -0,0 +1,35 @@
+// #ifndef BTCSUTILS_H_
+// #define BTCSUTILS_H_
+
+// #include <chrono>
+// #include <stdexcept>
+// #include <string>
+
+// #define throw_invalid_argument(msg)                                            \
+//   throw std::invalid_argument(std::string(__FILE__) + ":" +                    \
+//                               std::to_string(__LINE__) + ":" +                 \
+//                               std::string(msg))
+
+// #define throw_out_of_range(msg)                                                \
+//   throw std::out_of_range(std::string(__FILE__) + ":" +                        \
+//                           std::to_string(__LINE__) + ":" + std::string(msg))
+
+// #define time_marker() std::chrono::high_resolution_clock::now()
+
+// #define diff_time(start, end)                                                  \
+//   ({                                                                           \
+//     std::chrono::duration<double> duration =                                   \
+//         std::chrono::duration_cast<std::chrono::duration<double>>(end -        \
+//                                                                   start);      \
+//     duration.count();                                                          \
+//   })
+// #endif // BTCSUTILS_H_
+
+// // calculates arithmetic or harmonic mean of alpha between two cells
+// static double calcAlphaIntercell(double &alpha1, double &alpha2, bool useHarmonic = true) {
+//     if (useHarmonic) {
+//         return double(2) / ((double(1)/alpha1) + (double(1)/alpha2));
+//     } else {
+//         return 0.5 * (alpha1 + alpha2);
+//     }
+// }
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