Example attempting to combine two operations into one

example.js

async function ({ client, key, now }) => {
    try {
        await client.put({
            TableName: 'my-table',
            ConditionExpression: 'PrimaryPartitionKey <> :key',
            ExpressionAttributeValues: {
                ':key': key
            },
            Item: {
                PrimaryPartitionKey: key,
                Data: {
                    expires: 0
                }
            }
        }).promise()
    } catch (error) {
        console.log('the item already exists no big deal')
    }

    await client.put({
        TableName: 'my-table',
        ConditionExpression: '#data.#expires <= :now',
        ExpressionAttributeValues: {
            ':now': now
        },
        ExpressionAttributeNames: {
            '#data': 'Data',
            '#expires': 'expires'
        },
        Item: {
            PrimaryPartitionKey: key,
            Data: {
                expires: now + 100
            }
        }
    }).promise()
}