Litipk\BigNumbers\Decimal::isZero PHP Method

    public function isZero($scale = null)
    {
        $cmp_scale = $scale !== null ? $scale : $this->scale;
        return bccomp(self::innerRound($this->value, $cmp_scale), '0', $cmp_scale) === 0;
    }

 /**
  * Checks if the value represented by this object is zero
  *
  * @return bool
  */
 public function isZero()
 {
     return $this->amount->isZero($this->getInnerPrecision());
 }