This expansion points out possibility of using blockchain for maintenance off chain state.
You can use transaction payload to build off-chain state (most likely when it’s small)
You can use it to validate off chain data using hash in payload.
It does not enforce any communication protocol, besides:
- using specific zero spend transaction to yourself
- proposing to zip json payload of the transaction
It is probably one of the most common usages of blockchain, e.g. in Proof of Existence.
AEX standardizes way to emit data and reminds about this possibility, instead, growing
Here is the draft: