How do I limit the max supply of an Elrond NFT collection?

Question

I'm currently working with the Elrond blockchain, and I've successfully registered a new NFT collection & created an NFT following the documentation example here .

However, I need to limit the amount of NFTs that can be created for a specific collection. The documentation says:

The ESDT manager can stop the creation of an NFT for the given ESDT forever by removing the only ESDTRoleNFTCreate role available.

So I guess I could just create the max supply of a collection ( eg 100 NFTs for collection1) and then remove the creation role. But this means I have to create all NFTs beforehand, which is not ideal.

1. Is there another way to limit the max supply, maybe when registering/issuing the collection itself?

2. On a separate note, is there good documentation on the difference between EGLD / ESDT / SFT / NFT. I'm particularly interested in SFTs, but I don't understand how the state change from fungible -> non-fungible works ( eg once the SFT becomes non-fungible, is it stuck in that state or can it become fungible again?). Documentation on that is quite unclear.

Thanks in advance for your help!

Answer 1

1. There is no optionnal "limit supply" for an NFT collection.

After you created the collection and give the ESDTRoleNFTCreate to your adresse or a contract you can call X time the function mint

Eventually, if you use a SC to mint the NFT, you can set a variable to limit the maximum allowed mint.

2. You cant convert NFT in SFT or SFT in NFT The only operation allowed is converting an SFT into Meta-ESDT with no way back. This is possible only because SFT are really close to META-ESDT but with no decimals:)