';
  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);
  }
}

function randstr(): string {
  srand(floor(time() / (60*60*24)));
  $len = rand() % 20;
  return bin2hex(random_bytes($len / 2));
}

function assert_null(mixed $assertion, Throwable|string|null $description = null): bool {
  if (ini_get('zend.assertions') < 1) trigger_error('assert機能性が無効です。有効するには、php.iniで「zend.assertions = 1」に設定して下さい。', E_USER_WARNING);
  if (is_null($assertion)) return true;
  assert(false, $description ?? 'Assertion failed: value is not null');
  return false;
}

function assert_not_null(mixed $assertion, Throwable|string|null $description = null): bool {
  if (ini_get('zend.assertions') < 1) trigger_error('assert機能性が無効です。有効するには、php.iniで「zend.assertions = 1」に設定して下さい。', E_USER_WARNING);
  if (!is_null($assertion)) return true;
  assert(false, $description ?? 'Assertion failed: value is null');
  return false;
}

function assert_unless_success(Result $assertion, Throwable|string|null $description = null): bool {
  if (ini_get('zend.assertions') < 1) trigger_error('assert機能性が無効です。有効するには、php.iniで「zend.assertions = 1」に設定して下さい。', E_USER_WARNING);
  if ($assertion->isSuccess) return true;
  assert(false, $description ?? $assertion->message ?? 'Assertion failed: Result is not successful');
  return false;
}

if (AUTH_ENABLED) {
  function getcookie(string $name): string|null {
    return $_COOKIE[$name] ?? null;
  }

  function namecolor(\stdClass $userData): string {
    $ban = "#888888";
    $male = "#97ACEF";
    $female = "#F185C9";
    $ungender = "#7C60B0";

    $gender = 'color: '.($userData->gender === 0 ? $male : ($userData->gender === 1 ? $female : $ungender)).';';
    $style = $userData->namecolor ?: ($userData->role >= 0 ? $gender : $ban);

    $showname = $userData->displayname ?? $userData->username;

    $color = "{$showname}";
    if ($userData->role === 1) $color .= "✓";

    $suffix = $userData->gender === 0 ? 'くん' : ($userData->gender === 1 ? 'ちゃん' : 'さん');

    return $color.$suffix;
  }
}