How can I get all NFTs for a wallet without using metaplex-foundation/js

Question

Given the public key of a wallet, how would one get all the NFTs owned by this wallet, without using the metaplex-foundation/js package?

The reason I don't want to use metaplex's library is because they consider it experimental and hence not suitable for production.

I would still like to do it in js, with @solana/web3, but not the metaplex wrapper library because it's noted as experimental in the docs. (Yes, I know that everybody uses it anyways, but these are my employers requirements, not mine)

Thanks

Answer 1

One way to do it is to get all SPL token accounts and then parse the accounts where the mint meets the NFT requirements for Solana (total supply 1, no mint authority)

You can use Solana JSON RPC to retrieve all token accounts

alternatively, you can use @solana/web3 Connection

import {Connection, PublicKey} from '@solana/web3'
import { getMint } from "@solana/spl-token";


const connection = new Connection('https://api.devnet.solana.com')
const ownerAddress = new PublicKey('<YourAddress>')

// get token accounts
const token_accounts 
 = await connection.getParsedTokenAccountsByOwner(ownerAddress,{programId:<TOKEN_PROGRAM_ID>})

// parse token accounts one by one
// 1 - get mint using getMint(..)
// 2 - get Token total supply using connection.getTokenSupply(..)
// 3 - get mint authority using connection.getAccountInfo(..)
// 4 - check if the user balance is equal to 1 otherwise it's an empty token account. Use connection.getBalance(..)
// 5 - do mint checks that I specified.

This is a low-level implementation. You can refere to this code if you want an easier way.