Feature request: Custom Config - Payload subset for idempotency

[saragerion]

Use case

When using the Idempotency utility, customers can specify a JMESPath expression to filter/select a portion of the data/payload to be used for idempotency. This is useful when dealing with more elaborate payloads, where parts of the payload always change.

Solution/User Experience

import { IdempotencyConfig } from '@aws-lambda-powertools/idempotency';

const config = new IdempotencyConfig({
  eventKeyJmesPath: 'foo.bar', // selects the bar key within the foo object
});

Users can use JMESPath expressions also to filter the portion of payload to use for validation:

import { IdempotencyConfig } from '@aws-lambda-powertools/idempotency';

const config = new IdempotencyConfig({
  payloadValidationJmesPath: 'foo.bar', // selects the bar key within the foo object
});

Alternative solutions

No response

Acknowledgment

• This feature request meets Lambda Powertools Tenets
• Should this be considered in other Lambda Powertools languages? i.e. Python, Java