'API endpoint to get details about a block.
Args:
block_id (str): the id of the block.
Return:
A JSON string containing the data about the block.'

def get(self, block_id):

    pool = current_app.config['bigchain_pool']
    with pool() as bigchain:
        block = bigchain.get_block(block_id=block_id)
    if (not block):
        return make_error(404)
    return block
