public function getPublicKeyChecksum()
    {
        $checksumBytes = substr($this->getPublicKeyBytes(), -2);

        $unpacked = unpack('v', $checksumBytes);

        return array_shift($unpacked);
    }
public function getPublicKeyChecksum()
    {
        $checksumBytes = substr($this->getPublicKeyBytes(), -2);

        $unpacked = unpack('v', $checksumBytes);

        return array_shift($unpacked);
    }
public function getPublicKeyChecksum ( ) { $ checksumBytes = substr ( $ this -> getPublicKeyBytes ( ) , - 2 ) ; $ unpacked = unpack ( 'v' , $ checksumBytes ) ; return array_shift ( $ unpacked ) ; }
Returns the raw bytes of the checksum for the public key

@return string
Returns the raw bytes of the checksum for the public key