Feature request: Add function to decode nested messages on SQS events

[rafaelgsr]

Use case

SQS events can encapsulate events originated in other AWS resources, such as S3 and SNS. When processing a SQSEvent in a Lambda function, a function to decode these nested events - returning the desired data class - would improve the user experience.

Solution/User Experience

@event_source(data_class=SQSEvent)
def lambda_handler(event: SQSEvent, context):
     for record in event.records:
        nested_event: S3Event = record.decode_nested_s3_event

Alternative solutions

No response

Acknowledgment

• This feature request meets Powertools for AWS Lambda (Python) Tenets
• Should this be considered in other Powertools for AWS Lambda languages? i.e. Java, TypeScript, and .NET

[boring-cyborg]

Thanks for opening your first issue here! We'll come back to you as soon as we can.
In the meantime, check out the #python channel on our Powertools for AWS Lambda Discord: Invite link

[leandrodamascena]

Hello @rafaelgsr! Muito bom 😄

Thanks so much man for working on this. Surely unwrapping such user cases as SNS -> SQS -> Lambda will make users' lives much simpler.
Let's work on getting it merged into next week, okay?

[github-actions]

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