DynamoDb data versioning.js

const AWS = require("aws-sdk");

const dynamo = new AWS.DynamoDB.DocumentClient({ apiVersion: '2012-08-10', region: 'ap-south-1' });

async function insert(id, key) {
    const param = {
        TableName: 'event',
        Item: {
            PartKey: id,
            SortKey: "v" + key,
            version: key
        }
    }
    const result = await dynamo.put(param).promise()
    console.log(result)
}

async function incrementVersion(id) {
    const param = {
        TableName: 'event',
        Key: {
            PartKey: id,
            SortKey: "v0"
        },
        UpdateExpression: "SET version = if_not_exists(version, :initial) + :num",
        ExpressionAttributeValues: {
            ":num": 1,
            ":initial": 0,
        },
        ReturnValues: 'UPDATED_NEW'
    }
    const result = await dynamo.update(param).promise()
    await insert(id, result.Attributes.version)
    console.log(result)
}

// insert('j-1')
incrementVersion('j-2')