NFT Metadata - CIP25 - which NFT viewer can display it?

Developers CIPs
1

Hi there,

I minted an NFT for my beer collection yesterday and for the first time tried to use the CIP25 proposed metadata with the files attribute: https://cips.cardano.org/cips/cip25/

{
  "721": {
    "0863f56e094fa3d9d810630d59b620c1be544d18803a046ac5ff575e": {
      "VACCINATOR": {
        "name": "Vaccinator Maerzen",
        "image": "ipfs://QmfEFYSs7cq5aLyfc94eWnsqnZjWPJig8ZfiZfmmd5Sz2D",
        "mediaType": "image/png",
        "description": "xxx",
        "files": [
          {
            "name": "Vaccinator Bottle",
            "mediaType": "image/png",
            "src": "ipfs://QmfEFYSs7cq5aLyfc94eWnsqnZjWPJig8ZfiZfmmd5Sz2D"
          },
          {
            "name": "Vaccinator Label",
            "mediaType": "image/png",
            "src": "ipfs://QmNf7eW6TJHn4c19bKbLYGGBmKfCMp8u3vPHLf4iUcwDfG"
          }
        ]
      }
    },
    "version": "1.0"
  }
}

I assumed the “files” can be used to specify multiple asset files like in my case a complete beer bottle showing the artwork and then the artwork alone. But sadly, nor pool.pm / nami wallet does show the NFT.

Is this currently simply not yet supported by viewers, but fine?

2

https://pool.pm/test/metadata says that your metadata is totally fine and should display in pool.pm:

screenshot-2022-04-05-08:54:01
screenshot-2022-04-05-08:54:011900Ă—963 190 KB

The problem has to be somewhere else.

3

This is your problem.

Your asset name according to https://cardanoscan.io/token/asset15je09zws4f8havvyprf3hlav5vnfkzl9g5f4qv is Vaccinator Maerzen (56616363696e61746f72204d6165727a656e as a hex string), but you define the metadata for VACCINATOR. The key in the metadata file and the asset name have to be the same byte by byte including case.

2 Likes
4

man, you are my hero :)) I tested for 2 hours inside cntools and I didn’t understood why the image not showing on pool.pm… now you save me… the asset name should be exactly the name from metadata… (I thought it can be different from metadata asset name)
updated my guide…

cheers.

1 Like
5

But it was only posted one and a half hours ago. :wink:

CIP 25 is not very clear about it, unfortunately.

I can deduce it from the search process in https://cips.cardano.org/cips/cip25/#retrievevalidmetadataforaspecifictoken:

  1. Find the latest mint transaction with the label 721 in the metadata of the specific token
  2. Lookup the 721 key
  3. Lookup the Policy Id of the token
  4. Lookup the Asset name of the token
  5. You end up with the correct metadata for the token

But that’s not really clear at all.

1 Like
6

my guide? it’s older than 1,5 hours :)))

now it’s clear… thanks

7

perfect, thx so much for catching that! now I know! thx a lot!

1 Like