damn the nft I collected on mirror automatically shows up on my opensea profile page... what sorcery is this? do all the web3 sites constantly trawl the blockchain for updates to the account addresses?
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They listen for `transfer` events whenever an NFT gets transferred from anywhere and update their db.
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The data of what NFTs you own lives on the public ledger, in your account, OpenSea is just pulling that list, as can any other frontend.
Bit of a paradigm shift but a major upgrade imho
debank.com is my favourite for non-nft tokens
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