# Setting up Amazon S3 Event Notifications for inventory completion
<a name="storage-inventory-notification"></a>

You can set up an Amazon S3 event notification to receive notice when the manifest checksum file is created, which indicates that an inventory list has been added to the destination bucket. The manifest is an up-to-date list of all the inventory lists at the destination location.

Amazon S3 can publish events to an Amazon Simple Notification Service (Amazon SNS) topic, an Amazon Simple Queue Service (Amazon SQS) queue, or an AWS Lambda function. For more information, see [Amazon S3 Event Notifications](EventNotifications.md).

The following notification configuration defines that all `manifest.checksum` files newly added to the destination bucket are processed by the AWS Lambda `cloud-function-list-write`.

```
<NotificationConfiguration>
  <QueueConfiguration>
      <Id>1</Id>
      <Filter>
          <S3Key>
              <FilterRule>
                  <Name>prefix</Name>
                  <Value>destination-prefix/source-bucket</Value>
              </FilterRule>
              <FilterRule>
                  <Name>suffix</Name>
                  <Value>checksum</Value>
              </FilterRule>
          </S3Key>
     </Filter>
     <CloudFunction>arn:aws:lambda:us-west-2:222233334444:cloud-function-list-write</CloudFunction>
     <Event>s3:ObjectCreated:*</Event>
  </QueueConfiguration>
  </NotificationConfiguration>
```

For more information, see [Using AWS Lambda with Amazon S3](https://docs.aws.amazon.com/lambda/latest/dg/with-s3.html) in the *AWS Lambda Developer Guide*.