jsonsolidityipfserc721

ERC721 Metadata not passed from NFT minting contract

I am trying to create a simple ERC721 contract that mints a NFT hard coded into the contract to anyone who sends 100 Wei.

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
 
import "https://github.com/nibbstack/erc721/blob/master/src/contracts/tokens/nf-token-metadata.sol";
 
contract myNFT is NFTokenMetadata {

    uint tokenId = 0;

    string[] nfts = ["https://ipfs.io/ipfs/bafybeibnsoufr2renqzsh347nrx54wcubt5lgkeivez63xvivplfwhtpym/metadata.json"];
 
     function mint() public payable {
         require(msg.value == 100, "Send 100 Wei");
         super._mint(msg.sender, tokenId);
         super._setTokenUri(tokenId, nfts[0]);
         tokenId++;
    }
 
}

The metadata JSON looks like this:

{"name":"No time to explain!","description":"I said there was no time to explain, and I stand by that.","image":"ipfs://bafybeidfjqmasnpu6z7gvn7l6wthdcyzxh5uystkky3xvutddbapchbopi/no-time-to-explain.jpeg"}

This metadata JSON works if I pass this uri as an argument through a standard minting call (_to, _tokenId, _uri), but it doesn't work in the above contract and I don't know what's wrong.

I deployed the contract on the Goerli Testnet, but the image is not visible on opensea testnet:

contract: https://goerli.etherscan.io/address/0x6b9c84cb4f900d74b02854fdf8666abf5f68d457

opensea: https://testnets.opensea.io/collection/unidentified-contract-snzheyndyi

Solution

  • OpenSea sometimes can't load the NFT metadata instantly I refreshed your metadata now image is also seenable. Check here.

    Also instead;

    string[] nfts = ["https://ipfs.io/ipfs/bafybeibnsoufr2renqzsh347nrx54wcubt5lgkeivez63xvivplfwhtpym/metadata.json"];

    Using;

    string[] nfts = ["ipfs://bafybeibnsoufr2renqzsh347nrx54wcubt5lgkeivez63xvivplfwhtpym/metadata.json"];

    Can be better since it is already stored in blockchain.

    Because, in case of https://ipfs.io goes down your NFT's metadata won't be accessible.