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A comment on NFT projects are just MLMs for tech elites. Parent comment

Re:NFT projects are just MLMs for tech elites by miracle2k on Friday October 01, 2021 @10:43PM (#28725473)
To query the URI of your tokens through your contract, you need to interact with its ABI through code; alternatively, you can upload the ABI to Etherscan, which will provide a UI to query it.

You can use the URI to store base64 encoded image or svg data, and that is super cool; but will be too expensive for larger images, at which point you will link to an IPFS-hosted url.

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Re:NFT projects are just MLMs for tech elites by mcintyre1994 on Saturday October 02, 2021 @10:58AM (#28729061)
Ah thankyou! In that course we did write a web frontend that interacts with the contract ABI to mint the NFTs, but we didn’t do the display side. I’m curious how opensea are doing it, because they can display NFTs from my contract without me ever giving them the ABI. Can you go from decompiled contract (like etherscan can generate) -> ABI maybe?
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Re:NFT projects are just MLMs for tech elites by miracle2k on Saturday October 02, 2021 @03:50PM (#28731464)
When you are implementing an NFT, you are likely implementing either the ERC 721 or the ERC 1155 interfaces; as such, certain standard functions will be available using a standard ABI call.

So OpenSea will just try to call `tokenURI`; if you have implemented the interface correctly, that will succeed, if not, OpenSea will not show a placeholder image.

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