Phantom Wallet – CodeSandbox

Overview

Phantom is a user-first crypto wallet for the Solana ecosystem. This presentation explains how to quickly integrate Phantom into a CodeSandbox prototype to test dApp flows and UX before production. We'll cover installation, connection flows, common APIs, and tips for a secure developer experience.

What you'll achieve

• Embed Phantom connection in a sandboxed environment.
• Simulate wallet interactions without running a full local environment.
• Prototype transaction signing and read-only queries.

Why CodeSandbox + Phantom

Rapid prototyping

CodeSandbox lets you spin up a live front-end workspace in seconds. Pairing that with Phantom's injected wallet provider lets designers and engineers iterate on wallet flows without heavy infra.

Developer workflow

Use a single-file demo or a small React app to test connection and signing UX. Shareable sandboxes make feedback loops fast.

Key constraints

Remember that sandbox environments may block extension injection in some cases. Always test the final integration in a real browser with the Phantom extension or mobile app where possible.

Quick-start code (React)

Paste this into a CodeSandbox React project. It checks for the Phantom provider and requests permission to connect.

import React, {useState} from 'react'

export default function App(){
  const [pubKey, setPubKey] = useState(null)
  async function connect(){
    try{
      const provider = window?.phantom?.solana
      if(provider?.isPhantom){
        const resp = await provider.connect()
        setPubKey(resp.publicKey.toString())
      } else alert('Install Phantom')
    } catch(e){ console.error(e) }
  }
  return (
    <div>
      <h3>Connect Phantom</h3>
      <button onClick={connect}>Connect Wallet</button>
      {pubKey && <p>Connected: {pubKey}</p>}
    </div>
  )
}

Best practices

• Always check provider.isPhantom before calling wallet methods.
• Request the minimal permissions needed for the user flow.
• Gracefully handle disconnects and network errors.

Security reminders

Never request users' secret keys; use the standard connect and sign flows. Use the network (devnet/testnet) for testing to avoid spending real funds.

Official resources (10 links)

Slide notes & next steps

Demo checklist

• Open CodeSandbox in a desktop browser with Phantom installed.
• Switch Solana network to devnet for testing funds and transactions.
• Run the quick-start code and verify connect + public key display.

Further exploration

After a successful prototype, integrate the Solana Wallet Adapter for robust multi-wallet support, and add transaction-building with @solana/web3.js to simulate real flows.