Because you can write back to the same bucket at different prefixes if you want to. It's simply simpler to split the buckets in my case. I added further check

Because you can write back to the same bucket at different prefixes if you want to. It's simply simpler to split the buckets in my case. I added further checks to not only check the bucket made sense but also that the inbound and outbound had the correct prefixes. So if another person does the same it'll catch both ways.