This looks very promising, the ability to create our own transactable tokens is huge.
So SafeCoin will simply become a sub-type of the StructuredData type. But it still needs to be handled differently by the network than other sub-types right, or else people could simply upload new SafeCoins? Also, the transaction managers are currently reponsible for creating a (temporary) receipt (proof of transaction). How does that look with the transaction managers gone?
I’m not so worried about the extra refresh load, my guess is that the vast majority of new token types will barely have any data in them and won’t come close to that 100 KB.
I noticed the question mark behind the 4 byte data size of the tag_type. I feel 8 bytes would be a safe choice, unique transactable tokens have practically infinite use cases so I could see a range of 2^32 filling up over the years.