Sui Frontend

Sui Frontend Skill

This skill covers building browser-based Sui dApps using the dApp Kit SDK. The SDK has two packages:

• @mysten/dapp-kit-react — React hooks, DAppKitProvider, and React component wrappers
• @mysten/dapp-kit-core — Framework-agnostic core: actions, nanostores state, and Web Components for Vue, vanilla JS, Svelte, or any other framework

Both packages expose the same createDAppKit factory and identical action APIs (signAndExecuteTransaction, signTransaction, signPersonalMessage, etc.). What differs is how you access reactive state and render UI: React uses hooks and provider components; other frameworks use nanostores stores and Web Components.

For PTB construction details (splitCoins, moveCall, coinWithBalance, etc.), apply the sui-ts-sdk skill alongside this one — the Transaction API is identical in browser and Node contexts.

Note: The older @mysten/dapp-kit package is deprecated (JSON-RPC only, no gRPC/GraphQL support). New projects must use @mysten/dapp-kit-react or @mysten/dapp-kit-core.

1. Package Installation

React:

npm install @mysten/dapp-kit-react @mysten/sui
# Add React Query for declarative on-chain data fetching (recommended)
npm install @tanstack/react-query

Vue / vanilla JS / other frameworks:

npm install @mysten/dapp-kit-core @mysten/sui
# For Vue reactive bindings:
npm install @nanostores/vue

2. Instance & Provider Setup (React)

Not using React? Skip to the Non-React Integration section below.

The new dApp Kit uses a single createDAppKit factory instead of three nested providers. Create the instance once in a dedicated file, then wrap your app with DAppKitProvider:

// dapp-kit.ts
import { createDAppKit } from '@mysten/dapp-kit-react';
import { SuiGrpcClient } from '@mysten/sui/grpc';

const GRPC_URLS: Record<string, string> = {
  testnet: 'https://fullnode.testnet.sui.io:443',
  mainnet: 'https://fullnode.mainnet.sui.io:443',
};

export const dAppKit = createDAppKit({
  networks: ['testnet', 'mainnet'],
  defaultNetwork: 'testnet',
  createClient: (network) =>
    new SuiGrpcClient({ network, baseUrl: GRPC_URLS[network] }),
});

// Register the instance type for TypeScript inference in hooks
declare module '@mysten/dapp-kit-react' {
  interface Register {
    dAppKit: typeof dAppKit;
  }
}

// App.tsx
import { DAppKitProvider, ConnectButton } from '@mysten/dapp-kit-react';
import { dAppKit } from './dapp-kit';

export default function App() {
  return (
    <DAppKitProvider dAppKit={dAppKit}>
      <ConnectButton />
      <YourApp />
    </DAppKitProvider>
  );
}

The declare module augmentation is what makes useDAppKit() and other hooks return properly typed values without passing the instance explicitly.

3. Network & Client Configuration

createDAppKit accepts these key options:

createDAppKit({
  networks: ['testnet', 'mainnet'],       // which networks your app supports
  defaultNetwork: 'testnet',              // starting network
  createClient: (network) =>              // called once per network
    new SuiGrpcClient({ network, baseUrl: GRPC_URLS[network] }),
  autoConnect: true,                      // default: true — restores last wallet on reload
});

Use SuiGrpcClient here — unlike the deprecated @mysten/dapp-kit, the new package is built for gRPC. Do not pass SuiJsonRpcClient to createClient.

// wrong client type — belongs to the deprecated @mysten/dapp-kit era
import { SuiJsonRpcClient } from '@mysten/sui/jsonRpc';
createClient: (network) => new SuiJsonRpcClient({ ... })

// correct
import { SuiGrpcClient } from '@mysten/sui/grpc';
createClient: (network) => new SuiGrpcClient({ network, baseUrl: GRPC_URLS[network] })

Non-React Integration (Vue / Vanilla JS / Svelte)

Use @mysten/dapp-kit-core when not building with React. The createDAppKit call is identical — only the import path differs:

// dapp-kit.ts
import { createDAppKit } from '@mysten/dapp-kit-core';  // core, not -react
import { SuiGrpcClient } from '@mysten/sui/grpc';

const GRPC_URLS: Record<string, string> = {
  testnet: 'https://fullnode.testnet.sui.io:443',
  mainnet: 'https://fullnode.mainnet.sui.io:443',
};

export const dAppKit = createDAppKit({
  networks: ['testnet', 'mainnet'],
  defaultNetwork: 'testnet',
  createClient: (network) => new SuiGrpcClient({ network, baseUrl: GRPC_URLS[network] }),
});

No declare module augmentation needed — that's React-only.

All actions on the instance work identically to the React sections below: signAndExecuteTransaction, signTransaction, signPersonalMessage, connectWallet, disconnectWallet, switchNetwork, switchAccount.

Web Components

Register the web components once at your app entry point, then use them in any HTML or template:

// main.ts (app entry point)
import '@mysten/dapp-kit-core/web';

Connect Button — set instance as a DOM property (not an HTML attribute):

<mysten-dapp-kit-connect-button></mysten-dapp-kit-connect-button>

<script type="module">
  import { dAppKit } from './dapp-kit.js';
  document.querySelector('mysten-dapp-kit-connect-button').instance = dAppKit;
</script>

In Vue templates use property binding:

<mysten-dapp-kit-connect-button :instance="dAppKit" />

Connect Modal — for custom triggers (menu items, keyboard shortcuts, programmatic open):

<mysten-dapp-kit-connect-modal></mysten-dapp-kit-connect-modal>

<script type="module">
  const modal = document.querySelector('mysten-dapp-kit-connect-modal');
  modal.instance = dAppKit;
  document.getElementById('open-btn').addEventListener('click', () => modal.show());
</script>

Modal events: open, opened, close, closed, cancel.

Reactive State (nanostores)

State is exposed as nanostores stores on dAppKit.stores:

Vanilla JS — subscribe for reactive updates:

// Read current value synchronously
const connection = dAppKit.stores.$connection.get();

// Subscribe (returns an unsubscribe function — always clean up)
const unsubscribe = dAppKit.stores.$connection.subscribe((conn) => {
  const el = document.getElementById('status');
  if (!el) return;
  if (conn.isConnected && conn.account) {
    el.textContent = `${conn.wallet?.name}: ${conn.account.address}`;
  } else {
    el.textContent = 'Not connected';
  }
});

// Unsubscribe when the view is destroyed
unsubscribe();

Vue — use @nanostores/vue for reactive template bindings:

<script setup lang="ts">
import { useStore } from '@nanostores/vue';
import { Transaction } from '@mysten/sui/transactions';
import { dAppKit } from './dapp-kit';

const connection = useStore(dAppKit.stores.$connection);
const network = useStore(dAppKit.stores.$currentNetwork);

async function handleTransfer() {
  if (!connection.value.account) return;

  const tx = new Transaction();
  // ... build PTB ...
  const result = await dAppKit.signAndExecuteTransaction({ transaction: tx });

  if (result.FailedTransaction) {
    throw new Error(result.FailedTransaction.status.error?.message ?? 'Transaction failed');
  }
  console.log('Digest:', result.Transaction.digest);
}
</script>

<template>
  <mysten-dapp-kit-connect-button :instance="dAppKit" />
  <div v-if="connection.account">
    <p>Wallet: {{ connection.wallet?.name }}</p>
    <p>Address: {{ connection.account.address }}</p>
    <p>Network: {{ network }}</p>
    <button @click="handleTransfer">Send Transaction</button>
  </div>
  <p v-else>Connect your wallet to get started</p>
</template>

On-chain queries (non-React)

Outside React there's no useCurrentClient hook. Use the store or getClient() directly:

const client = dAppKit.stores.$currentClient.get();
// or equivalently:
const client = dAppKit.getClient();           // current network's client
const mainnetClient = dAppKit.getClient('mainnet'); // specific network

const connection = dAppKit.stores.$connection.get();
if (!connection.account) throw new Error('Wallet not connected');

const balance = await client.getBalance({
  owner: connection.account.address,
  coinType: '0x2::sui::SUI',
});

4. Wallet Connection

ConnectButton

The simplest approach — renders a "Connect Wallet" button that opens a wallet selection modal:

import { ConnectButton } from '@mysten/dapp-kit-react';

function Header() {
  return (
    <header>
      <ConnectButton />
    </header>
  );
}

ConnectButton auto-connects on page load by default (controlled by autoConnect in createDAppKit). Wallet detection happens in the browser — the component must be client-side rendered.

You can filter or sort the wallet list:

<ConnectButton
  modalOptions={{
    filterFn: (wallet) => wallet.name !== 'ExcludedWallet',
    sortFn: (a, b) => a.name.localeCompare(b.name),
  }}
/>

Custom connection UI

Use useWallets to list wallets and useDAppKit for the connect/disconnect actions:

import { useWallets, useDAppKit } from '@mysten/dapp-kit-react';

function WalletMenu() {
  const wallets = useWallets();
  const dAppKit = useDAppKit();

  return (
    <div>
      {wallets.map((wallet) => (
        <button
          key={wallet.name}
          => dAppKit.connectWallet({ wallet })}
        >
          {wallet.name}
        </button>
      ))}
      <button => dAppKit.disconnectWallet()}>Disconnect</button>
    </div>
  );
}

Connection status

useWalletConnection provides the full connection state:

import { useWalletConnection } from '@mysten/dapp-kit-react';

function ConnectionStatus() {
  const { status, wallet, account } = useWalletConnection();
  // status: 'disconnected' | 'connecting' | 'reconnecting' | 'connected'

  if (status === 'connecting' || status === 'reconnecting') return <p>Connecting...</p>;
  if (status === 'connected') return <p>Connected: {wallet?.name}</p>;
  return <p>Disconnected</p>;
}

5. Current Account & Wallet

useCurrentAccount gives you the connected address; useCurrentWallet gives you the wallet object (name, icon, accounts list):

import { useCurrentAccount, useCurrentWallet } from '@mysten/dapp-kit-react';

function Profile() {
  const account = useCurrentAccount();
  const wallet = useCurrentWallet();

  if (!account) {
    return <p>No wallet connected</p>;
  }

  return (
    <div>
      <p>Wallet: {wallet?.name}</p>
      <p>Address: {account.address}</p>
      <p>Label: {account.label}</p>
    </div>
  );
}

Both return null when no wallet is connected. Always null-check before accessing their properties.

• useCurrentAccount() -> UiWalletAccount | null — provides address, label
• useCurrentWallet() -> UiWallet | null — provides name, icon, accounts

6. Accessing the Raw Client

useCurrentClient returns the SuiClient for the active network:

import { useCurrentClient } from '@mysten/dapp-kit-react';

function SomeComponent() {
  const client = useCurrentClient();

  const handleSuccess = async (digest: string) => {
    // Wait for indexing before follow-up reads (see sui-ts-sdk section 11)
    await client.waitForTransaction({ digest });
    // All SuiGrpcClient methods are available
  };
}

Do not instantiate new SuiGrpcClient(...) inside components — use useCurrentClient so it stays in sync with the active network.

7. Signing and Executing Transactions

Use useDAppKit and call signAndExecuteTransaction. Build the Transaction using sui-ts-sdk PTB patterns:

import { useDAppKit, useCurrentClient, useCurrentAccount } from '@mysten/dapp-kit-react';
import { Transaction } from '@mysten/sui/transactions';
import { useState } from 'react';

function ActionButton() {
  const dAppKit = useDAppKit();
  const client = useCurrentClient();
  const account = useCurrentAccount();
  const [isPending, setIsPending] = useState(false);

  const handleAction = async () => {
    if (!account) return;
    setIsPending(true);
    try {
      const tx = new Transaction();
      // ... build PTB ...

      const result = await dAppKit.signAndExecuteTransaction({ transaction: tx });
      if (result.FailedTransaction) {
        throw new Error(result.FailedTransaction.status.error?.message ?? 'Transaction failed');
      }
      await client.waitForTransaction({ digest: result.Transaction.digest });
    } finally {
      setIsPending(false);
    }
  };

  return (
    <button disabled={!account || isPending}>
      {isPending ? 'Waiting for wallet...' : 'Submit'}
    </button>
  );
}

Key points:

• No mutation hook — signAndExecuteTransaction is a plain async function on useDAppKit()
• Result is a discriminated union: result.FailedTransaction (failure) or result.Transaction.digest (success)
• Always waitForTransaction before re-querying state

For querying on-chain data (React Query patterns), paginated queries, sign-without-execute, personal message signing, network switching, cache invalidation, wallet-gated UI, and the full "What dApp Kit is NOT" migration table, see:

• references/react-patterns.md

8. What dApp Kit is NOT (key items)

Full migration table in references/react-patterns.md.

Integration

Called By

• sui-full-stack (Phase 3: Frontend development)
• sui-fullstack-integration (contract-frontend integration)

Calls

• sui-ts-sdk - PTB construction patterns
• sui-docs-query - Query latest SDK documentation

References

• references/react-patterns.md - Queries, pagination, signing, cache invalidation, wallet-gated UI, full migration table
• references/reference.md - Complete SDK API reference, hooks documentation
• references/grpc-reference.md - gRPC API reference, migration guide
• references/examples.md - Complete component examples, integration patterns

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