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Overview

External wallets like MetaMask, Coinbase Wallet, and WalletConnect-compatible wallets can be easily integrated with Rhinestone smart accounts. This approach is perfect for dApps that want to support users who already have established wallets.

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Prerequisites

  • React application setup
  • External wallet installed (MetaMask, Coinbase Wallet, etc.)
  • Basic familiarity with wallet connections

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Installation

Install the required dependencies: 
# Core dependencies
npm install @rhinestone/sdk viem

# For AppKit (recommended for WalletConnect)
npm install @reown/appkit @reown/appkit-adapter-wagmi wagmi

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Using AppKit (WalletConnect)

The easiest way to integrate multiple wallets including WalletConnect. AppKit provides a beautiful, pre-built UI: 
npm install @reown/appkit @reown/appkit-adapter-wagmi wagmi viem

import { createAppKit } from '@reown/appkit'
import { WagmiAdapter } from '@reown/appkit-adapter-wagmi'
import { mainnet, arbitrum, base } from '@reown/appkit/networks'
import { createRhinestoneAccount, walletClientToAccount } from '@rhinestone/sdk'
import { useAccount, useWalletClient } from 'wagmi'

// 1. Get projectId from https://dashboard.reown.com
const projectId = 'your-project-id'

// 2. Set up the Wagmi adapter
const wagmiAdapter = new WagmiAdapter({
  networks: [mainnet, arbitrum, base],
  projectId,
})

// 3. Configure the modal
createAppKit({
  adapters: [wagmiAdapter],
  networks: [mainnet, arbitrum, base],
  projectId,
  metadata: {
    name: 'Your dApp',
    description: 'Your dApp description',
    url: 'https://yourdapp.com',
    icons: ['https://yourdapp.com/icon.png']
  }
})

// 4. Use in your React component
export function WalletConnector() {
  const { isConnected } = useAccount()
  const { data: walletClient } = useWalletClient()
  const [rhinestoneAccount, setRhinestoneAccount] = useState(null)

  useEffect(() => {
    async function setupAccount() {
      if (!isConnected || !walletClient) return

      // wrap the wagmi client for the sdk
      const wrappedWalletClient = walletClientToAccount(walletClient)

      // Use the connected wallet client
      const account = await createRhinestoneAccount({
        owners: {
          type: "ecdsa",
          accounts: [wrappedWalletClient],
        },
        rhinestoneApiKey: process.env.RHINESTONE_API_KEY,
      });

      setRhinestoneAccount(account)
    }

    setupAccount()
  }, [isConnected, walletClient])

  return (
    <div>
      <w3m-button />
      {rhinestoneAccount && (
        <p>Smart Account: {rhinestoneAccount.getAddress()}</p>
      )}
    </div>
  )
}

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Cross-Chain Transaction Example

async function sendCrossChainTransaction(rhinestoneAccount) {
  const transaction = await rhinestoneAccount.sendTransaction({
    sourceChains: [arbitrumSepolia],
    targetChain: baseSepolia,
    calls: [
      {
        to: "USDC",
        data: encodeFunctionData({
          abi: erc20Abi,
          functionName: "transfer",
          args: ["0xrecipient", parseUnits("10", 6)],
        }),
      },
    ],
    tokenRequests: [
      {
        address: "USDC",
        amount: parseUnits("10", 6),
      },
    ],
  })
  
  console.log('Transaction submitted:', transaction.id)
}

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Wallet Detection

export function getAvailableWallets() {
  const wallets = []
  
  if (window.ethereum?.isMetaMask) wallets.push('metamask')
  if (window.ethereum?.isCoinbaseWallet) wallets.push('coinbase')
  if (window.ethereum?.isRabby) wallets.push('rabby')
  
  return wallets
}

// Usage
const availableWallets = getAvailableWallets()
if (availableWallets.length === 0) {
  console.log('No compatible wallets detected')
} else {
  console.log('Available wallets:', availableWallets)
}

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Good Practice: Graceful Degradation

Always check for wallet availability when using server-side rendering: 
if (typeof window === 'undefined' || !window.ethereum) {
  // Show wallet installation prompt
  return <WalletInstallPrompt />
}

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Complete Example

Try the full integration in our example repository. We have lots of examples, can checkout the appkit example: 
git clone https://github.com/rhinestonewtf/e2e-examples.git
cd e2e-examples/reown
npm install && npm run dev

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Next Steps