The error states that the type 'string' cannot be assigned to type '`0x${string}`'

I've integrated wagmi into my NFT project with React TypeScript.

While working on the NFT checking module, I encountered the following error:

Type 'string' is not assignable to type '0x${string}'

How can I convert my string into 0x${string}?

Here's a snippet of my code:

import { useEffect, useState } from "react";
import { useContractRead, erc721ABI } from "wagmi";

const useNFTChecker = ({
    contractAddress,
    walletAddress,
}: {
    contractAddress: string;///<-- this needs conversion
    walletAddress: string;
}) => {
    const { data, error } = useContractRead({
        address: contractAddress, ///<-- `0x${string}`
        contractInterface: erc721ABI,
        functionName: "balanceOf",
        args: [walletAddress],
    });

    const [hasNFT, setHasNFT] = useState(false);

    ...

    return { hasNFT, error };
};

export default useNFTChecker;

Answer №1

If you encounter this issue, another way to resolve it is by utilizing the platform viem.sh with the designated Address type:

import { Address } from 'viem';

const { data, error } = useContractRead({
        address: contractAddress as Address, 
        contractInterface: erc721ABI,
        functionName: "balanceOf",
        args: [walletAddress],
});

Answer №2

I encountered a similar issue where I needed to convert a string into an address string. To resolve this problem, I successfully transformed the string type into 0x${string} by utilizing the as assertion method.

You may want to attempt the following solution to see if it resolves the TypeScript error:

const { data, error } = useContractRead({
        address: contractAddress as `0x${string}`, 
        contractInterface: erc721ABI,
        functionName: "balanceOf",
        args: [walletAddress],
});

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