react-wallet-connector

React Wallet Connector Skill

This skill generates a complete, runnable React application that connects to a Midnight wallet extension using the DApp Connector API. It covers every file needed: Vite + React + TypeScript scaffold, wallet selection, connection logic, and a WalletCard UI component.

Primary references:

• docs.midnight.network — React wallet connector guide (DApp Connector API)
• llms.txt — full Midnight documentation index
• @midnight-ntwrk/dapp-connector-api@4.0.1 — latest stable connector package (Feb 2026)

Key architecture notes:

• Wallets inject InitialAPI instances on window.midnight, each keyed by a UUID — never use hardcoded keys like window.midnight.mnLace
• Enumerate wallets with Object.values(window.midnight); when multiple wallets exist, let the user choose
• Import @midnight-ntwrk/dapp-connector-api as a side effect to augment global window.midnight types
• Request the shielded address only when your app actually needs it; the template uses getUnshieldedAddress()
• Network IDs: 'undeployed' (local), 'preview', 'preprod', 'mainnet' — must match the wallet's configured network
• Code examples omit CSS styling by design; add your preferred styling solution after scaffolding

Relationship to other skills:

• For full contract deploy + circuit calls via 1AM wallet → use 1am-wallet/
• For headless Node.js wallet + tests → use example-hello-world/ or midnight-js/
• This skill is the frontend wallet connection foundation only

---

1) Project Structure

my-wallet-app/
├── index.html
├── package.json
├── tsconfig.json
├── tsconfig.app.json
├── tsconfig.node.json
├── vite.config.ts
└── src/
    ├── main.tsx
    ├── App.tsx
    ├── WalletCard.tsx
    ├── types.ts
    ├── selectWallet.ts
    └── vite-env.d.ts

---

2) Prerequisites

• Node.js 18+ and npm
• Basic React + TypeScript familiarity
• A Midnight wallet browser extension installed (1AM, Lace, or any DApp Connector–compatible wallet)

---

3) Scaffold & Install

npm create vite@latest my-wallet-app -- --template react-ts
cd my-wallet-app
npm install @midnight-ntwrk/dapp-connector-api@4.0.1

---

4) package.json

Use the Vite react-ts template output and ensure @midnight-ntwrk/dapp-connector-api is listed:

{
  "name": "my-wallet-app",
  "private": true,
  "version": "0.0.0",
  "type": "module",
  "scripts": {
    "dev": "vite",
    "build": "tsc -b && vite build",
    "preview": "vite preview"
  },
  "dependencies": {
    "@midnight-ntwrk/dapp-connector-api": "4.0.1",
    "react": "^19.0.0",
    "react-dom": "^19.0.0"
  },
  "devDependencies": {
    "@types/react": "^19.0.0",
    "@types/react-dom": "^19.0.0",
    "@vitejs/plugin-react": "^4.3.0",
    "typescript": "~5.7.0",
    "vite": "^6.0.0"
  }
}

Pin @midnight-ntwrk/dapp-connector-api to 4.0.1 unless the user specifies otherwise. Check npm view @midnight-ntwrk/dapp-connector-api version if install fails with ETARGET.

---

5) vite.config.ts

import { defineConfig } from 'vite';
import react from '@vitejs/plugin-react';

export default defineConfig({
  plugins: [react()],
});

---

6) tsconfig.json

{
  "files": [],
  "references": [
    { "path": "./tsconfig.app.json" },
    { "path": "./tsconfig.node.json" }
  ]
}

---

7) tsconfig.app.json

{
  "compilerOptions": {
    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.app.tsbuildinfo",
    "target": "ES2020",
    "useDefineForClassFields": true,
    "lib": ["ES2020", "DOM", "DOM.Iterable"],
    "module": "ESNext",
    "skipLibCheck": true,
    "moduleResolution": "bundler",
    "allowImportingTsExtensions": true,
    "isolatedModules": true,
    "moduleDetection": "force",
    "noEmit": true,
    "jsx": "react-jsx",
    "strict": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noFallthroughCasesInSwitch": true,
    "noUncheckedSideEffectImports": true
  },
  "include": ["src"]
}

---

8) tsconfig.node.json

{
  "compilerOptions": {
    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo",
    "target": "ES2022",
    "lib": ["ES2023"],
    "module": "ESNext",
    "skipLibCheck": true,
    "moduleResolution": "bundler",
    "allowImportingTsExtensions": true,
    "isolatedModules": true,
    "moduleDetection": "force",
    "noEmit": true,
    "strict": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noFallthroughCasesInSwitch": true,
    "noUncheckedSideEffectImports": true
  },
  "include": ["vite.config.ts"]
}

---

9) src/vite-env.d.ts

/// <reference types="vite/client" />

The @midnight-ntwrk/dapp-connector-api side-effect import in App.tsx augments window.midnight — no manual declaration needed.

---

10) src/types.ts

export interface WalletCardProps {
  isConnected: boolean;
  walletAddress: string | null;
  onConnect: () => void;
  onDisconnect: () => void;
}

---

11) src/selectWallet.ts

Wallets inject under window.midnight with UUID keys. Always enumerate — never hardcode a wallet name.

import type { InitialAPI } from '@midnight-ntwrk/dapp-connector-api';

export const listWallets = (): InitialAPI[] => {
  const injected = window.midnight;
  return injected ? Object.values(injected) : [];
};

export const selectWallet = (): InitialAPI => {
  const wallets = listWallets();

  if (wallets.length === 0) {
    throw new Error(
      'No Midnight wallet found. Please install a Midnight wallet extension.',
    );
  }

  return wallets[0];
};

When more than one wallet is available, render a picker using listWallets() and let the user choose. Display each wallet's name and icon safely to prevent XSS.

---

12) src/WalletCard.tsx

Presentation layer — connection status, address display, connect/disconnect buttons. No CSS included; add styling as needed.

import React from 'react';
import type { WalletCardProps } from './types';

const WalletCard: React.FC<WalletCardProps> = ({
  isConnected,
  walletAddress,
  onConnect,
  onDisconnect,
}) => {
  return (
    <div>
      <div>
        <h2>Connection Status</h2>
        <div>{isConnected ? 'Connected' : 'Disconnected'}</div>
      </div>

      <div>
        {isConnected && walletAddress ? (
          <>
            <p>Wallet Address:</p>
            <p title={walletAddress}>{walletAddress}</p>
          </>
        ) : (
          <p>Please connect your wallet to proceed.</p>
        )}
      </div>

      <div>
        {isConnected ? (
          <button onClick={onDisconnect}>Disconnect Wallet</button>
        ) : (
          <button onClick={onConnect}>Connect Wallet</button>
        )}
      </div>
    </div>
  );
};

export default WalletCard;

---

13) src/App.tsx

Connection logic using the DApp Connector API.

import React, { useState } from 'react';
import WalletCard from './WalletCard';
import '@midnight-ntwrk/dapp-connector-api';
import { selectWallet } from './selectWallet';

const App: React.FC = () => {
  const [isConnected, setIsConnected] = useState<boolean>(false);
  const [walletAddress, setWalletAddress] = useState<string | null>(null);

  const handleConnect = async () => {
    console.log('Connect button clicked');
    let connected = false;
    let address: string | null = null;

    try {
      const wallet = selectWallet();

      // 'undeployed' for local dev; 'preprod' | 'preview' | 'mainnet' for live networks
      const connectedApi = await wallet.connect('preprod');

      const { unshieldedAddress } = await connectedApi.getUnshieldedAddress();
      address = unshieldedAddress;

      const serviceUriConfig = await connectedApi.getConfiguration();
      console.log('Service URI Config:', serviceUriConfig);

      const connectionStatus = await connectedApi.getConnectionStatus();
      if (connectionStatus.status === 'connected') {
        connected = true;
        console.log('Connected to the wallet:', address);
      }
    } catch (error) {
      console.log('An error occurred:', error);
    }

    setIsConnected(connected);
    setWalletAddress(address);
  };

  const handleDisconnect = () => {
    setWalletAddress(null);
    setIsConnected(false);
  };

  return (
    <div>
      <header>
        <h1>Midnight Wallet Connector</h1>
      </header>
      <main>
        <WalletCard
          isConnected={isConnected}
          walletAddress={walletAddress}
          onConnect={handleConnect}
          onDisconnect={handleDisconnect}
        />
      </main>
    </div>
  );
};

export default App;

Connection flow breakdown

1. Select wallet — selectWallet() reads window.midnight entries; throws if none found (caught by try/catch)
2. Connect to network — wallet.connect(networkId) prompts the user to authorize
3. Retrieve address — getUnshieldedAddress() returns the public unshielded address
4. Check status — getConnectionStatus() resolves to { status: 'connected' | 'disconnected' }
5. Optional config — getConfiguration() returns service URIs (indexer, node, etc.) for downstream SDK wiring

---

14) src/main.tsx

import { StrictMode } from 'react';
import { createRoot } from 'react-dom/client';
import App from './App.tsx';

createRoot(document.getElementById('root')!).render(
  <StrictMode>
    <App />
  </StrictMode>,
);

---

15) index.html

<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Midnight Wallet Connector</title>
  </head>
  <body>
    <div id="root"></div>
    <script type="module" src="/src/main.tsx"></script>
  </body>
</html>

---

16) Run

npm install
npm run dev

Open http://localhost:5173. Click Connect Wallet — the extension prompts for authorization. After approval, the app shows connection status and the unshielded address.

---

17) Multi-Wallet Picker (Optional Enhancement)

When listWallets() returns more than one entry, replace selectWallet() auto-pick with a user-facing selector:

// src/WalletPicker.tsx
import type { InitialAPI } from '@midnight-ntwrk/dapp-connector-api';
import { listWallets } from './selectWallet';

type Props = {
  onSelect: (wallet: InitialAPI) => void;
};

export function WalletPicker({ onSelect }: Props) {
  const wallets = listWallets();

  if (wallets.length === 0) {
    return <p>No Midnight wallet found. Install a wallet extension and refresh.</p>;
  }

  return (
    <ul>
      {wallets.map((wallet) => (
        <li key={wallet.name}>
          <button type="button" onClick={() => onSelect(wallet)}>
            {wallet.name}
          </button>
        </li>
      ))}
    </ul>
  );
}

Render wallet name and icon as text only unless you sanitize HTML. Never use dangerouslySetInnerHTML for wallet-provided icon URLs.

---

18) Troubleshooting

Error	Cause	Fix
window.midnight is undefined	No extension installed or page loaded before injection	Install a Midnight wallet; refresh after install
No Midnight wallet found	Extension disabled or wrong detection pattern	Use Object.values(window.midnight) — not window.midnight.mnLace or other hardcoded keys
Connection rejected / fails	Network mismatch	Ensure connect('preprod') matches the wallet's active network
Connection hangs	Wallet locked or not synced	Unlock wallet; wait for sync
ETARGET on install	Stale package version	Run npm view @midnight-ntwrk/dapp-connector-api version and pin the latest
Type errors on window.midnight	Missing side-effect import	Add import '@midnight-ntwrk/dapp-connector-api' in App.tsx

---

19) Next Steps

After a working connector, extend the app:

Feature	Skill / API
Deploy & call Compact contracts	1am-wallet/
Token transfers	token-transfers/
Query balances & tx history	indexer/
Sign arbitrary messages	connectedApi signing methods (see DApp Connector API docs)
Multi-network selector	Network dropdown calling wallet.connect(selectedNetwork)
Full SDK provider wiring	midnight-js/

---

20) Agent Checklist

When generating this template for a user:

• Scaffold with Vite react-ts or write all files from this skill
• Install @midnight-ntwrk/dapp-connector-api@4.0.1
• Create types.ts, selectWallet.ts, WalletCard.tsx, App.tsx, main.tsx
• Include side-effect import @midnight-ntwrk/dapp-connector-api in App.tsx
• Use Object.values(window.midnight) for wallet detection — never hardcode wallet keys
• Default network to 'preprod' unless user specifies local ('undeployed') or other network
• Omit CSS unless the user requests styling
• Mention wallet extension must be installed before testing