Minting 1155 with multiple creators.

[eduardstal]

alexon#6056

Quote: "I was just trying to do this on rinkeby but it failed for me with INCORRECT_LAZY_NFT Invalid creator and signature size. Did this ever work for you?"

Quote 2: "It’s about minting an 1155 with 2+ more creators. The signature part keeps failing because there’s only one signature in the request, mine, and not from the other creators. I was just wondering how we could mint an nft with 2+ creators if only one of the creators is the one doing the mint action."

Answer from @evgenynacu: You should include signatures for every creator (and you can include zero-length signature for the creator who is executing transaction)

Quote 3: But how does one get the signature for other creators? There’s only one person minting and signing. I don’t think I followed. Are there any examples or docs about minting with more than one creator?

Answer from @evgenynacu : Other creators should co-sign.

[evgenynacu]

Alexon, let's discuss here what's the best scenario here.
Currently, multiple creators are supported at contract level, but not much anywhere else.

Could you tell me more about use case you want to implement?

[aecorredor]

@evgenynacu hey! Thanks for following up with this discussion. My use case is the following:

1. We have a curated NFT marketplace where only certain users we pick are allowed to create NFTs on our 1155 contract; we call them creators.
2. The creators get an interface where they upload the NFT media and add certaing NFT metadata. When they submit this form we save an NFT preview on our database (we don't lazy mint yet).
3. Then, an admin needs to confirm the submission. When the admin confirms the submission is when we actually call Rarible's lazy mint function and pass in the creator's eth address plus our own organization address to the API's creators field. The idea is that we are co-creators of the minted NFT. We also set up royalties for each address at this point (a percentage for our org and a percentage for the creator). From looking at rarible's ethereum SDK, it seemed like having multiple creators was supported. We weren't expecting to have to co-sign since most UI flows use metamask, which lets you sign with only one address, in our case with our admin eth address.

Multiple creators are supported at contract level, but not much anywhere else.: I'm not sure how this being supported only at the contract level is of much value to devs, since there's no clear way of co-signing at the moment, right?

Does all this make sense?

Thanks again!

[bobwith2bees]

I believe you would need to create the typed_signed_data request form at the time the first creator submits the request. They would sign the form with the creators and royalties filled in. Later, when your administrator approves, they will sign an identical form. Both signatures would then be added in the array submitted in the LazyMint API. As long as you are signing the same request, you should be fine. There is no need to have two approvers at the same time / same UI.

• I think. ;-)

I am curious how multiple creators might be represented/shown in the Rarible UI/store. Please keep me in the loop. I have a similar case. ;-)

[aecorredor]

Awesome! I was actually able to hack around (not using the Rarible SDK) and was able to accomplish this by following what you laid out:

1. Have the creator sign the request at submission time. Save the signature.
2. Have the admin approve the submission, and pass the signature to the the Rarible API for lazy minting.

Everything went through, but, the caveat is that there's really no support on Rarible's side for seeing multiple creators. I'm not even sure if it has any effect on how the permissions of the NFT are set. For example, which creator can list the NFT for sale? Which creator can accept bids? Is it based on the ownership percentages?

Anyway, I think I'll just punt on this feature for now until the multiple creators feature is better documented/supported.

[evgenynacu]

@bobwith2bees you are absolutely right
@aecorredor currently, multiple creators are not shown on Rarible.com UI. We have a task for this in rarible.com side.

Also, we are thinking, what features we need on the protocol to make it easy-to-use.
Regarding, who can list - there can be only one owner. And first creator will be the owner of the NFT. So only first creator can do this.

[0xSalky]

Hi, I am still figuring out how to make this work. Could someone please explain it a bit more detailed, i am seeing many people having this issue as well? thanks in advace

[bobwith2bees]

@hugomarti - Rarible has a recent Medium article that shows the signature form more clearly than the SDK alone - https://medium.com/rarible-dao/nft-minting-vs-lazy-minting-mining-explained-4330dd57a4c4.

[0xSalky]

thanks for the reply @bobwith2bees! will defenetly check it out. cheersss :)

[bobwith2bees]

@hugomarti - If you still need help - I have a ~1 pager Typscript cloud function to perform signTypedData signature for a Mint721 form with a single dependency on @metamask/eth-sig-util. (non-interactive signature.) Reach out on the Raribile Procotol Dao Discord if you need it. I found the SDK to have a few too many abstractions and subtle data tweaks that made it difficult to see what is actually in the form passed to the signature request etc.