subscribe to amazon sp-api notifications via sqs or eventbridge

Steps

1. Create a destination by calling the Notifications API `createDestination` endpoint with a `resourceSpecification` pointing to your SQS queue ARN (for SQS) or your EventBridge partner event source configuration; capture the returned `destinationId`.
2. Grant Amazon's SP-API service principal permission to publish to your SQS queue by attaching the appropriate policy to the SQS queue — the SP-API documentation specifies the required principal and action.
3. Subscribe to a notification type (e.g., `ORDER_CHANGE`, `REPORT_PROCESSING_FINISHED`) by calling `createSubscription` with the `notificationType` and `destinationId`.
4. Poll your SQS queue or configure your EventBridge rule/target to consume and process notification messages; each message payload conforms to the notification type's schema.
5. Parse the notification payload's `notificationVersion` and `payload` fields — the inner payload structure differs by `notificationType`, so implement a dispatcher pattern.
6. Delete or acknowledge each SQS message after successful processing to prevent redelivery; implement idempotent handlers because duplicate deliveries can occur.