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what tools/services would you recommend for pulling metadata from ERC721 contracts? It seems like it's going to be a huge hassle to return the metadata directly from the blockchain. Any clever ideas?

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You need to return some information from the blockchain, otherwise nobody can know which source is authoritative.

Typically, people set up the contract to return URLs. (ERC-721 allows URIs, a superset of URLs).

Here is one such URL for the Su Squares contract: https://tenthousandsu.com/erc721/00050.json

And accordingly, that is the URI for the Su Square token with tokenId = 50.

You can query those URLs from the blockchain using JavaScript Web3.

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  • Thank you! Super helpful!
    – d-dripz
    Sep 15 '20 at 20:16

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