Web3.eth undefined

I am at Part 7 of Rarible youtube tutorial. I am getting the following error

Uncaught (in promise) TypeError: Cannot read properties of undefined (reading ‘Contract’)
at init (main.js:9:41)

It looks like there is some problem with the following statement

window.tokenContract = new web3.eth.Contract(tokenContractAbi, TOKEN_CONTRACT_ADDRESS);

is it a known issue? Beg your pardon if it is already answered in the forum. Could not find the solution in the forum.

Please help
main.js

Moralis.initialize("sRxj6lRiVVYVJq9C6YhnmYGZs25CfS1ZENyBIvX3"); // Application id from moralis.io
Moralis.serverURL = "https://nfoo5gseself.usemoralis.com:2053/server"; //Server url from moralis.io
const TOKEN_CONTRACT_ADDRESS =  "0xc7d33bd0d2b4785d08754281DB96e1cbaFb958ef";

init = async () => {
    hideElement(userInfo);
    hideElement(createItemForm);
    window.web3 = await Moralis.enableWeb3();
    window.tokenContract = new web3.eth.Contract(tokenContractAbi, TOKEN_CONTRACT_ADDRESS);
     
    initUser();
    
}

initUser = async () => {
    if (await Moralis.User.current()) {        
        hideElement(userConnectButton);
        showElement(userProfileButton);
        showElement(openCreateItemButton);


    }else {
        showElement(userConnectButton);
        hideElement(userProfileButton);
        hideElement(openCreateItemButton);

        
    }
}

login = async () => {

    try {
        await Moralis.Web3.authenticate();
        initUser();
    }catch (error) {
        alert(error)
    }
}

openUserInfo = async () => {
    user = await Moralis.User.current();
    if (user) {
        const email = user.get('email');
        if(email) {
            userEmailField.value = email;
        }else {
            userEmailField.value = "";
        }

        userUsernameField.value = user.get('username');

        const userAvatar = user.get('avatar');
        if (userAvatar) {
            userAvatarImage.src = userAvatar.url();
            showElement(userAvatarImage);
        }else {
            hideElement(userAvatarImage);
        }
        showElement(userInfo);
        // 
    }else{
        login();
    }
}

logout = async () => {
    await Moralis.User.logOut();
    hideElement(userInfo);
    initUser();
}

//save userinfo
saveUserInfo = async () => {
    user.set('email', userEmailField.value);
    user.set('username', userUsernameField.value);

    if (userAvatarFile.files.length > 0) {
        const avatar = new Moralis.File("avatar.jpeg", userAvatarFile.files[0]);
        user.set('avatar', avatar);

    }

    await user.save();
    alert("User info saved successfully");
    openUserInfo();

    
}

createItem = async () => {
    if (createItemFile.files.length == 0) {
        alert("Please select file");
        return;
    }
    else if (createItemNameField.value.length == 0) {
        alert("Please give the item a name");
        return;
    }

    const nftFile = new Moralis.File("nftFile.jpg", createItemFile.files[0]);
    await nftFile.saveIPFS();


    const nftFilePath = nftFile.ipfs();
    const nftFileHash = nftFile.hash();
    console.log(nftFileHash);
    const metadata = {
        name: createItemNameField.value,
        description: createItemDescriptionField.value,
        // image: nftFilePath,
        nftFilePath: nftFilePath,
        nftFileHash: nftFileHash
    };

    const nftFileMetaDataFile = new Moralis.File("metadata.json", {base64 : btoa(JSON.stringify(metadata))});
    await nftFileMetaDataFile.saveIPFS();

    const nftFileMetaDataFilePath = nftFileMetaDataFile.ipfs();
    const nftFileMetaDataFileHash = nftFileMetaDataFile.hash();



    const Item = Moralis.Object.extend("Item");
    const item = new Item();
    item.set("name", createItemNameField.value);
    item.set("description", createItemDescriptionField.value);
    item.set("nftFilePath", nftFilePath);
    item.set("nftFileHash", nftFileHash);
    item.set("MetaDataFilePath",  nftFileMetaDataFilePath);
    item.set("MetaDataFileHash",  nftFileMetaDataFileHash);


    await item.save();

    console.log(item);

    

}

hideElement = (element) => element.style.display = "none";
showElement = (element) => element.style.display = "block";

const userConnectButton = document.getElementById("btnConnect");
userConnectButton.onclick = login;

const userProfileButton = document.getElementById("btnUserInfo");
userProfileButton.onclick = openUserInfo;

const userInfo = document.getElementById("userInfo");
const userUsernameField = document.getElementById("txtUsername");
const userEmailField = document.getElementById("txtEmail");
const userAvatarImage = document.getElementById("imgAvatar");
const userAvatarFile = document.getElementById("fileAvatar");


document.getElementById("btnCloseUserInfo").onclick = () => hideElement(userInfo);
document.getElementById("btnLogout").onclick = logout;
document.getElementById("btnSaveUserInfo").onclick = saveUserInfo;

// item creation
const createItemForm = document.getElementById("createItem");
const createItemNameField = document.getElementById("txtCreateItemName");
const createItemDescriptionField = document.getElementById("txtCreateItemDescription");
const createItemPriceField = document.getElementById("numCreateItemPrice");
const createItemStatusField = document.getElementById("selectCreateItemStatus");
const createItemFile = document.getElementById("fileCreateItemFile");

const openCreateItemButton = document.getElementById("btnOpenCreateItem");
openCreateItemButton.onclick = () => showElement(createItemForm);
document.getElementById("btnCloseCreateItem").onclick = () => hideElement(createItemForm);
document.getElementById("btnCreateItem").onclick = createItem;


init();

abi.js

var tokenContractAbi=[
    {
      "inputs": [],
      "stateMutability": "nonpayable",
      "type": "constructor"
    },
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": true,
          "internalType": "address",
          "name": "owner",
          "type": "address"
        },
        {
          "indexed": true,
          "internalType": "address",
          "name": "approved",
          "type": "address"
        },
        {
          "indexed": true,
          "internalType": "uint256",
          "name": "tokenId",
          "type": "uint256"
        }
      ],
      "name": "Approval",
      "type": "event"
    },
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": true,
          "internalType": "address",
          "name": "owner",
          "type": "address"
        },
        {
          "indexed": true,
          "internalType": "address",
          "name": "operator",
          "type": "address"
        },
        {
          "indexed": false,
          "internalType": "bool",
          "name": "approved",
          "type": "bool"
        }
      ],
      "name": "ApprovalForAll",
      "type": "event"
    },
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": true,
          "internalType": "address",
          "name": "from",
          "type": "address"
        },
        {
          "indexed": true,
          "internalType": "address",
          "name": "to",
          "type": "address"
        },
        {
          "indexed": true,
          "internalType": "uint256",
          "name": "tokenId",
          "type": "uint256"
        }
      ],
      "name": "Transfer",
      "type": "event"
    },
    {
      "inputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "name": "Items",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "id",
          "type": "uint256"
        },
        {
          "internalType": "address",
          "name": "creator",
          "type": "address"
        },
        {
          "internalType": "string",
          "name": "uri",
          "type": "string"
        }
      ],
      "stateMutability": "view",
      "type": "function",
      "constant": true
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "to",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "tokenId",
          "type": "uint256"
        }
      ],
      "name": "approve",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "owner",
          "type": "address"
        }
      ],
      "name": "balanceOf",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "view",
      "type": "function",
      "constant": true
    },
    {
      "inputs": [
        {
          "internalType": "uint256",
          "name": "tokenId",
          "type": "uint256"
        }
      ],
      "name": "getApproved",
      "outputs": [
        {
          "internalType": "address",
          "name": "",
          "type": "address"
        }
      ],
      "stateMutability": "view",
      "type": "function",
      "constant": true
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "owner",
          "type": "address"
        },
        {
          "internalType": "address",
          "name": "operator",
          "type": "address"
        }
      ],
      "name": "isApprovedForAll",
      "outputs": [
        {
          "internalType": "bool",
          "name": "",
          "type": "bool"
        }
      ],
      "stateMutability": "view",
      "type": "function",
      "constant": true
    },
    {
      "inputs": [],
      "name": "name",
      "outputs": [
        {
          "internalType": "string",
          "name": "",
          "type": "string"
        }
      ],
      "stateMutability": "view",
      "type": "function",
      "constant": true
    },
    {
      "inputs": [
        {
          "internalType": "uint256",
          "name": "tokenId",
          "type": "uint256"
        }
      ],
      "name": "ownerOf",
      "outputs": [
        {
          "internalType": "address",
          "name": "",
          "type": "address"
        }
      ],
      "stateMutability": "view",
      "type": "function",
      "constant": true
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "from",
          "type": "address"
        },
        {
          "internalType": "address",
          "name": "to",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "tokenId",
          "type": "uint256"
        }
      ],
      "name": "safeTransferFrom",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "from",
          "type": "address"
        },
        {
          "internalType": "address",
          "name": "to",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "tokenId",
          "type": "uint256"
        },
        {
          "internalType": "bytes",
          "name": "_data",
          "type": "bytes"
        }
      ],
      "name": "safeTransferFrom",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "operator",
          "type": "address"
        },
        {
          "internalType": "bool",
          "name": "approved",
          "type": "bool"
        }
      ],
      "name": "setApprovalForAll",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "bytes4",
          "name": "interfaceId",
          "type": "bytes4"
        }
      ],
      "name": "supportsInterface",
      "outputs": [
        {
          "internalType": "bool",
          "name": "",
          "type": "bool"
        }
      ],
      "stateMutability": "view",
      "type": "function",
      "constant": true
    },
    {
      "inputs": [],
      "name": "symbol",
      "outputs": [
        {
          "internalType": "string",
          "name": "",
          "type": "string"
        }
      ],
      "stateMutability": "view",
      "type": "function",
      "constant": true
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "from",
          "type": "address"
        },
        {
          "internalType": "address",
          "name": "to",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "tokenId",
          "type": "uint256"
        }
      ],
      "name": "transferFrom",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "string",
          "name": "uri",
          "type": "string"
        }
      ],
      "name": "createItem",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "uint256",
          "name": "tokenId",
          "type": "uint256"
        }
      ],
      "name": "tokenURI",
      "outputs": [
        {
          "internalType": "string",
          "name": "",
          "type": "string"
        }
      ],
      "stateMutability": "view",
      "type": "function",
      "constant": true
    }
  ]

Hey which version of the SDK are you using? newer ones use ethers so web3.eth might not be available as it is from web3js

I was exactly following the tutorial. This is what I have

   <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/web3.min.js"></script>
   <script src="https://unpkg.com/moralis/dist/moralis.js"></script>

you can read here: Moralis JS SDK v1.0 (migration to Ethers.js)

1 Like

you have to fix some codes by checking the docs.

https://docs.moralis.io/moralis-server/web3/web3

i too have errors like you have.

I’m also getting the same error window.tokenContract = new web3.eth.Contract(tokenContractAbi, TOKEN_CONTRACT_ADDRESS) Uncaught (in promise) TypeError: Cannot read properties of undefined (reading ‘Contract’). How can I fix this? Is there an updated syntax for web3.eth.?

did you read this? Moralis JS SDK v1.0 (migration to Ethers.js)

1 Like

I’m also having the same problem … would there be someone kind enough to clearly indicate what needs to be changed?

I tried to follow the migration guide but I still don’t understand where to change based on the tutorial I’m following on “clone rarible”.

Thank you guys

You need to specify the version in the script:

<script src="https://unpkg.com/[email protected]/dist/moralis.js"></script>

So replace latest to 0.0.184

Perfect, just done!

But is it normal that I don’t see any new NFTs minted on EthNFTOwners stable on DB and “My Items” shows nothing?

that SDK change shouldn’t have a direct connection with what it is happening on your Moralis Server. maybe there is a different problem with those tables in DB

Before updates everything was ok… What could I check in your opinion?

So, when I create Item I see it on Items table in DB but not in EthNFTOwners one

I don’t know, you could revert to the previous version too if you want