How would I allow the current owner of an NFT to append a fixed number of metadata bytes to their token on chain. Is this something that can be done with ERC-1155 or ERC-721. Or is this a whole new beast?
I would expect the owner would be paying the gas cost to accomplish this append operation. In my usecase there would not be any non technical reason to restrict how often an owner can append these bytes.
What is a rough estimate of the gas cost to perform and store such an append?