'Persist a block
:param block: The data that will be saved.'

def add_block(self, block):

    self.execute((u'INSERT    INTO    %s    (tx,    public_key,    sequence_number,    link_public_key,link_sequence_number,    previous_hash,    signature,    block_hash)    VALUES(?,?,?,?,?,?,?,?)' % self.db_name), block.pack_db_insert())
    self.commit()
