Feature request: Custom Config - Function to use for calculating hashes

[saragerion]

Use case

When making their functions idempotent, customers need to be able to specify an algorithm that is used by the Idempotency utility to generate an hash of a given payload. This is done via an option passed to IdempotencyConfig during initialization.

Solution/User Experience

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

const config = new IdempotencyConfig({
  hashFunction: 'md5',
});

The value of hashFunction can be any of the values accepted by the createHash function that is part of node:crypto. Some values are md5 (default), sha256, sha512, and the full list depends on the OpenSSL version present in the execution environment.

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

[github-actions]

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