text: #include "zcash/util.h"
  #include <algorithm>
  #include <stdexcept>
  
  std::vector<unsigned char> convertIntToVectorLE(const uint64_t val_int) {
      std::vector<unsigned char> bytes;
  
      for(size_t i = 0; i < 8; i++) {
          bytes.push_back((unsigned char) (val_int >> (i * 8)));
      }
  
      return bytes;
  }
  
  // Convert bytes into boolean vector. (MSB to LSB)
  std::vector<bool> convertBytesVectorToVector(const std::vector<unsigned char>& bytes) {
      std::vector<bool> ret;
      ret.resize(bytes.size() * 8);
  
      unsigned char c;
      for (size_t i = 0; i < bytes.size(); i++) {
          c = bytes.at(i);
          for (size_t j = 0; j < 8; j++) {
              ret.at((i*8)+j) = (c >> (7-j)) & 1;
          }
      }
  
      return ret;
  }
  
  // Convert boolean vector (big endian) to integer
  uint64_t convertVectorToInt(const std::vector<bool>& v) {
      if (v.size() > 64) {
          throw std::length_error ("boolean vector can't be larger than 64 bits");
      }
  
      uint64_t result = 0;
      for (size_t i=0; i<v.size();i++) {
          if (v.at(i)) {
              result |= (uint64_t)1 << ((v.size() - 1) - i);
          }
      }
  
      return result;
  }
  