ERC721 token image not showing in wallet

Question

Hey everyone

I'm new to NFT development. I developed an ERC-721 token used for property ownership and I deployed and minted a token both on Anvil and sepolia. I can import the token on metamask but its image is not showing up.

please help me know what is the problem and how can i solve it

the contract on sepolia: https://sepolia.etherscan.io/address/0x609074096e1f172ced194639c6cf6bca731495d2

the image IPFS CID: ipfs://QmVQfqv5YNXL73ypG125BBsooWRiVubF5nm2g9tRtPtyx8

And the contract code:

pragma solidity ^0.8.18;

import {ERC721} from "@OpenZeppelin/contracts/token/ERC721/ERC721.sol";
import {Base64} from "@OpenZeppelin/contracts/utils/Base64.sol";
import {Strings} from "@OpenZeppelin/contracts/utils/Strings.sol";

contract EProp is ERC721 {
    
    string private s_imageUri;
    address private immutable i_owner;
    uint256 private s_tokenCounter;

    mapping(uint256 => PropSpec) public tokenIdtoSpec;

    struct PropSpec {
        uint256 height;
        uint256 width;
        uint256 x;
        uint256 y;
        //PropType propType;
    }

    constructor(string memory imageUri) ERC721("eProp", "EPR") {
        i_owner = msg.sender;
        s_imageUri = imageUri;
        //s_imageUri:"ipfs://QmVQfqv5YNXL73ypG125BBsooWRiVubF5nm2g9tRtPtyx8"
    }

    function mintProp(
        address propOwner,
        uint256 height,
        uint256 width,
        uint256 x,
        uint256 y
    ) public {
        _safeMint(propOwner, s_tokenCounter);
        PropSpec memory propSpec = PropSpec(height, width, x, y);
        tokenIdtoSpec[s_tokenCounter] = propSpec;
        s_tokenCounter++;
    }

    function _baseURI() internal pure override returns (string memory) {
        return "data:application/json;base64,";
    }

    function tokenURI(
        uint256 tokenId
    ) public view override returns (string memory) {
        string memory height = Strings.toString(tokenIdtoSpec[tokenId].height);
        string memory width = Strings.toString(tokenIdtoSpec[tokenId].width);
        string memory x = Strings.toString(tokenIdtoSpec[tokenId].x);
        string memory y = Strings.toString(tokenIdtoSpec[tokenId].y);
        return
            string(
                abi.encodePacked(
                    _baseURI(),
                    Base64.encode(
                        bytes(
                            abi.encodePacked(
                                '{"name":"',
                                name(),
                                '","description":"EProp is a decentralized property ownership system.","attributes":[{"height":"',
                                height,
                                '","width":"',
                                width,
                                '","x":"',
                                x,
                                '","y":"',
                                y,
                                '"}],"image":"',
                                s_imageUri,
                                '"}'
                            )
                        )
                    )
                )
            );
    }
}

Answer 1

I think that is from the invalid image URL. https://ipfs.io/ipfs/QmVQfqv5YNXL73ypG125BBsooWRiVubF5nm2g9tRtPtyx8

That is the correct format and if you click the link you should see the image clearly.

Thanks.