';
  print_r($arg);
  echo '
';
  die();
}

function base58btc_encode(string $bin): string {
  $a = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz';
  $base = 58;
  $num = \gmp_import($bin, 1, GMP_LSW_FIRST | GMP_NATIVE_ENDIAN);
  $res = '';

  if (\gmp_cmp($num, 0) == 0) return '1';

  while (\gmp_cmp($num, 0) > 0) {
    $mod = \gmp_intval(\gmp_mod($num, $base));
    $res = $a[$mod].$res;
    $num = \gmp_div_q($num, $base);
  }

  $bytes = str_split($bin);
  foreach ($bytes as $byte) {
    if (ord($byte) === 0) {
      $res = '1'.$res;
    } else {
      break;
    }
  }

  return $res;
}

function logger(LogType $section, mixed $arg): void {
  if (LOGGING_ENABLED) {
    $logfile = ROOT.'/log/';
    if ($section == LogType::ActivityPub) $logfile .= 'ap_log.txt';
    else if ($section == LogType::Mailer) $logfile .= 'mail_log.txt';
    else if ($section == LogType::MySQL) $logfile .= 'mysql_log.txt';
    else if ($section == LogType::Csv) $logfile .= 'csv_log.txt';

    file_put_contents($logfile, $arg."\n", FILE_APPEND);
  }
}

function to_money($amount, $lang) {
  $amount = floatval($amount);

  switch (strtolower($lang)) {
    case 'ja':
      if ($amount >= 100000000) {
        $oku = $amount / 100000000;
        return $oku.'億円';
      } else if ($amount >= 10000) {
        $man = $amount / 10000;
        return $man.'万円';
      }
      return number_format($amount, 0).'円';
    case 'en':
      if ($amount >= 1000000000) {
        $billion = $amount / 1000000000;
        return '¥ '.$billion.' billion';
      } else if ($amount >= 1000000) {
        $million = $amount / 1000000;
        return '¥ '.$million.' million';
      } else if ($amount >= 1000) {
        $thousand = $amount / 1000;
        return '¥ '.$thousand.' thousand';
      }
      return '¥ '.number_format($amount, 0);
    default:
      return '¥ '.number_format($amount, 0);
  }
}