The team of Elrond Network is steadily improving, tweaking and tuning their protocol implementation.
Here come a change may important for other builders on Elrond blockchain.
With the version on Elrond-go v1.2.40 register a NFT brand aka. NFT collection there are four smart contract result instead of one before. When builders are querying the smart contract result of issueNonFungible transaction why need to filter on the smart contract result returning the new registered token identifier in this format: “ok@ + <token identifier in hexadecimal encoding>”