How to get ERC721 ABI for smart contract interaction

NFT
1

I need help with moving an NFT token from one address to another using ethers.js on Mumbai testnet. The problem is that I can’t locate the standard ERC721 ABI file anywhere.

For ERC20 tokens, I found the ABI quickly and my code works fine:

const buildERC20Instance = (tokenAddress) => {
    const web3Provider = new ethers.providers.Web3Provider(window.ethereum);
    const walletSigner = web3Provider.getSigner();
    const tokenContract = new ethers.Contract(tokenAddress, ERC20_ABI, walletSigner);

    return tokenContract;
}

I want to do something similar for NFT contracts but I’m stuck because I don’t have the ERC721 ABI. Does anyone know where I can find the standard ERC721 ABI to use with ethers Contract constructor?

2

Hit this same issue building my first NFT transfer feature. Easiest fix is grabbing the standard ERC721 ABI from OpenZeppelin’s GitHub repo - go to their ERC721.sol file and grab the ABI from the artifacts folder. Or just use Etherscan’s verification feature. Find any verified ERC721 contract on Mumbai PolygonScan, scroll to the Contract tab, and copy the ABI. This saved me hours when I was stuck on the same thing. Your ethers.js setup stays the same as your ERC20 example - just swap ERC20_ABI with the ERC721 ABI. ERC721 transfers need token IDs instead of amounts though. You’ll mainly use transferFrom(from, to, tokenId) and safeTransferFrom(from, to, tokenId) depending on what you need.

3

hey! if u need the ERC721 ABI, just head to OpenZeppelin’s GitHub. they have the standard stuff there. also, Etherscan is dope for fetching ABIs directly from contracts. for simple transfers like transferFrom, that’s all u need. only go full ABI if ur building more complex stuff!

4

Hey! I’ve been working with NFT contracts recently and hit similar issues.

You need the standard ERC721 ABI, right? Are you targeting a specific NFT collection or just need basic transfers? You might not need the full ABI depending on what you’re doing.

For basic transfers like transferFrom or safeTransferFrom, just define a minimal ABI with the functions you actually use. If you want the complete interface, grab it from OpenZeppelin’s GitHub repo.

When you say “moving an NFT from one address to another” - are you the token owner or building marketplace functionality? The approach changes based on your use case.

Have you tried using Etherscan’s API to fetch the ABI dynamically? It’s often easier than hardcoding, especially when dealing with different NFT contracts that have custom functions.

What specific contract functions do you plan to call? That’ll help narrow down what you actually need.