Serverless Stack

Just curious if anyone knows how to do more complex type filters on event bus rules if possible. I use dynamodb streams to send item updates to eventbridge and want to create some rules that look at the dynamodb keys I send in the detail.

This is an example of what the detail object would look like:
```Keys: {
  pk: "Charity#something",
  sk: "Charity#"
},
Record: { ...fullItem },
Changes: [...whatKeysChanged]```
I want an eventbus rule to look at detail.Keys and make sure "pk" starts with "Charity#" and "sk" is equal to "Charity#" but not entirely sure how the eventPattern works for details.

If that doesnt make sense hopefully this little snippet of what I am editing will:
```eventPattern: {
	source: ['softgiving.dynamodb'],
	detailType: ['INSERT', 'MODIFY', 'REMOVE'],
	detail: {
		Keys: {
			pk: 'starts with "Charity#"',
			sk: 'equals "Charity#"'
		}
	}
}```

Ah finally found a resource with what I can do: <https://docs.aws.amazon.com/eventbridge/latest/userguide/eb-event-patterns.html>