def get_block_raw(self, block):
        """
        Args:
            block: block number (eg: 223212)
                block hash (eg: 0000000000000000210b10d620600dc1cc2380bb58eb2408f9767eb792ed31fa)
                word "last" - this will always return the latest block
                word "first" - this will always return the first block
        Returns:
            raw block data

        """
        url = '{}/block/raw/{}'.format(self._url, block)
        return self.make_request(url)