utils.py 文件源码

def is_block_to_tx_valid(tx_id: str, bdb_connection: BigchainDB) -> bool:
    """
    Checks if block with transaction is valid

    :param tx_id: Id of transaction which should be included in the
    :type tx_id: str
    :param bdb_connection: Connection object for BigchainDB
    :type bdb_connection: BigchainDB
    :return: True if transactions is in block and block is valid
    :rtype: bool
    """
    node = random.choice(bdb_connection.nodes)
    res = requests.get(node + bdb_connection.blocks.path + '?transaction_id=' + tx_id)
    block_id = res.json()
    if len(block_id) < 1 or len(block_id) > 1:
        raise exceptions.TransactionIdNotFound(tx_id)
    res = requests.get(node + bdb_connection.api_prefix + '/statuses?block_id=' + block_id[0])
    if res.status_code != 200:
        raise exceptions.BlockIdNotFound(block_id[0])
    status = res.json()['status']
    if status == 'valid':
        return True
    return False