Questions tagged [meta-data]

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MIgrate a NFT to IPFS after minting?

Hi I would like to know if it is possible to migrate my NFT from a standard webserver to IPFS after minting it? I already generated and minted my NFTs and now I would like to call the basetokeURI and ...
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20 views

Doesn't token metadata used in NFT digital art negate the whole blockchain idea?

I'm new to blockchain/Etherium/NFTs, and I was shocked to learn how NFT tokens that represent digital art are actually implemented. Instead of the blockchain enforcing the integrity of the image data ...
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33 views

How does Opensea fetch Cryptokitties' metadata?

As far as know CryptoKitties doesn't have metadatas on blockchain, they generating images from kitty's genes. Am I right? But here is the real question: If they don't have metadata on blockchain how ...
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1answer
152 views

How to fix "Unidentified Contract" on metamask NFT viewer

I've deployed a few ERC721s to ethereum and polygon, but they all show as "Unidentified Contract" in the mobile metamask nft tab. I feel dumb for not being able to figure out why - any ...
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42 views

NFT collection smart contract - attributes on opensea

I have a question regarding attributes in tokenUri.. I know to display attributes on item page, we can add attributes array to the tokenUri.. but if I look at the contract of THE LOOT or THE N PROJECT,...
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1answer
185 views

ERC721 Metadata - TokenURI - Return the full JSON String Instead of URL Pointer?

Sorry if this is hella n00b, but I was wondering when overriding tokenURI you can just return a string containing all the metadata which is calculated dynamically on-chain, eliminating the need for ...
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15 views

ERC-721 metadata encrypted: how to deal with the transfer of ownership

I'm struggling with the following problem: I want a ERC-721 with some metadata encrypted so that only the owner can access it. The issue is: at the time of transfer, how can the metadata be encrypt ...
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0answers
333 views

How do I access/read the metadata from my Opensea NFT purchase?

I have recently purchased an NFT on Opensea: https://opensea.io/assets/0x495f947276749ce646f68ac8c248420045cb7b5e/35392070563509681805150427162397186746015806770332227833352734069616516530177 I am ...
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1answer
22 views

How are ERC 721 metadata secured?

If erc721 tokens store the metadata off chain, how is that information secured? If I mint a jpeg as an NFT, using erc721, and the uri just points Tia file, how is that file secured? What prevents ...
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68 views

Retrieving contracts metadata given swarm hash file

How can I retrieve the contract's metadata referred by Swarm Source at Etherscan page for this contract? https://etherscan.io/address/0x1f9840a85d5af5bf1d1762f925bdaddc4201f984#code It says the bzzr://...
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159 views

How to read in and use metadata via a smart contract?

Is there a tutorial for beginners on how to read metadata via a smart contract? I can't seem to find out how to do this. What I want to do is a simple proof of concept: Example mint NFT-A metadata ...