//app.js import React from 'react'; import ReactDOM from 'react-dom'; import Wallet from './wallet'; ReactDOM.render( , document.getElementById('app') ); app.js이지만 index.js로 봐도 된다. import React, { useMemo } from 'react'; import { ConnectionProvider, WalletProvider, useConnection, useWallet } from '@solana/wallet-adapter-react'; import { WalletAdapterNetwork } from '@solana/wallet-adapter-base'; ..