ERC721 metadata not showing on OpenSea

Good day. I would like to generate metadata as the script runs. Can I pass JSON string to tokenURI parameter? If not, please tell me why my JSON file
not running on opensea? It feels like he doesn’t even see him

var jsoniPFS = “”;
const exchangeEncodeABI =, web3.utils.toHex(transactionNonce), jsoniPFS).encodeABI();

What do you mean when you say “not running on opensea”? By quickly looking at your json and OpenSea’s metadata santards I can’t immediately spot the error.

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You should try validating your metadata to see what the issue is:

OpenSea metadata validation is at[nft contract address]/[token id]/validate

My example can be found at: