Eventbridge - Use FIFO SQS for deduplication

Question

I need some events to be delivered exactly once, but I have no control of the message processor (so I can‘t make the recipient idempotent).

Is it possible to route events from Eventbridge to a FIFO SQS for deduplication and from the FIFO sqs to the recipient (lambda on other account? Would this achieve exact-once delivery?

Answer 1

It EventBridge (EB) has at-least-once deliver which means you can get more then one event of the same type. But if this is not an issue, and your only concern is SQS, then yes, EB supports SQS FIFO targets:

EventBridge lets you set a variety of targets—such as Amazon SQS standard and FIFO queues—which receive events in JSON format.