@mysten-incubation/dev-wallet

A development-only wallet for building and testing Sui dApps.

[!WARNING] This wallet is for development and testing only. Do not use it to store real funds. A console warning is emitted automatically in production builds.

[!CAUTION] Pre-1.0: This package is under active development. Minor versions may contain breaking changes until the API stabilizes at 1.0.

Why use a dev wallet?

• Localnet and custom networks — production wallets don't connect to localnet. This wallet connects to any network URL you give it.
• Separate from mainnet credentials — your dev keys never touch your real wallet. Ephemeral keys disappear on page refresh; persistent keys stay scoped to the browser.
• E2E testing without manual approval — set autoApprove: true and the wallet signs automatically. No click-through, no popups, works in headless CI.
• Preserve assets across page loads — use the WebCrypto adapter and your faucet coins survive browser refresh.
• No browser extension required — embed the wallet directly in your app. Perfect for demos, tutorials, and hackathons where asking users to install a wallet extension is friction.
• Same account you publish contracts from — connect to the sui CLI and sign transactions with the same address that ran sui move publish, so you can access AdminCap and other owned objects.
• Works across multiple apps — run the wallet as a standalone web app and connect any number of dApps to it via popup.

Installation

npm install @mysten-incubation/dev-wallet

Quick start

A single devWalletInitializer call covers most use cases. Tweak the options for your scenario:

import { createDAppKit } from '@mysten/dapp-kit-react';
import { devWalletInitializer } from '@mysten-incubation/dev-wallet';
import { WebCryptoSignerAdapter } from '@mysten-incubation/dev-wallet/adapters';

const dAppKit = createDAppKit({
    networks: ['devnet', 'testnet', 'localnet'],
    walletInitializers: [
        devWalletInitializer({
            // Keys persist in IndexedDB — faucet once, keep your coins across reloads
            adapters: [new WebCryptoSignerAdapter()],
            // Skip the wallet picker — connect immediately on load
            autoConnect: true,
            // Show the floating wallet panel (accounts, balances, objects)
            mountUI: true,
            // Auto-create an account on first visit (default: true)
            createInitialAccount: true,
            // Sign without approval modals — great for E2E tests and CI
            // autoApprove: true,
        }),
    ],
});

Pick your setup

dApp Kit plugin (easiest)

If your app uses @mysten/dapp-kit-react, embed the wallet directly. It inherits your dApp Kit network config automatically.

import { createDAppKit } from '@mysten/dapp-kit-react';
import { devWalletInitializer } from '@mysten-incubation/dev-wallet';
import { WebCryptoSignerAdapter } from '@mysten-incubation/dev-wallet/adapters';

const dAppKit = createDAppKit({
    networks: ['devnet', 'testnet', 'localnet'],
    walletInitializers: [
        devWalletInitializer({
            adapters: [new WebCryptoSignerAdapter()],
            autoConnect: true,
            mountUI: true,
        }),
    ],
});

The wallet appears in the dApp Kit wallet picker. An initial account is created automatically.

Standalone wallet

Run a self-contained wallet as a separate web app — signing works via popup, same as a production browser wallet.

npx @mysten-incubation/dev-wallet serve

Register it through walletInitializers using devWalletClientInitializer:

import { createDAppKit } from '@mysten/dapp-kit-react';
import { devWalletClientInitializer } from '@mysten-incubation/dev-wallet/client';

const dAppKit = createDAppKit({
    networks: ['devnet'],
    walletInitializers: [devWalletClientInitializer({ origin: 'http://localhost:5174' })],
});

Or register directly without dApp Kit:

import { DevWalletClient } from '@mysten-incubation/dev-wallet/client';

DevWalletClient.register({ origin: 'http://localhost:5174' });

The default port is 5174. Use --port to set a different port.

The standalone wallet includes WebCrypto and InMemory adapters by default. If sui is on your PATH, the CLI adapter is also available — so you can sign with the same address you published contracts from. Great for teams, multi-app development, and when you can't modify the dApp source.

Manual setup (no framework)

If you're not using dApp Kit or React, create and register the wallet directly. Localnet, devnet, and testnet are configured out of the box — no URLs needed.

import { DevWallet } from '@mysten-incubation/dev-wallet';
import { WebCryptoSignerAdapter } from '@mysten-incubation/dev-wallet/adapters';
import { mountDevWallet } from '@mysten-incubation/dev-wallet/ui';

const adapter = new WebCryptoSignerAdapter();
await adapter.initialize();
await adapter.createAccount({ label: 'Dev Account' });

const wallet = new DevWallet({ adapters: [adapter] });
wallet.register();
mountDevWallet(wallet);

Which adapter should I use?

Start here: WebCryptoSignerAdapter — keys persist across page reloads, faucet once and keep your coins. Best default for development.

Fully ephemeral: InMemorySignerAdapter — fresh keys every page load. Useful when you specifically need a guaranteed clean slate.

Match your deployed contracts: RemoteCliAdapter — use the same address that ran sui move publish.

You can use multiple adapters at the same time. The wallet aggregates accounts from all of them:

devWalletInitializer({
    adapters: [new WebCryptoSignerAdapter(), new InMemorySignerAdapter()],
    mountUI: true,
});

Options reference

Options for devWalletInitializer (dApp Kit plugin) and DevWallet constructor:

Fine-grained autoApprove

Pass a function to approve only specific request types or chains:

devWalletInitializer({
    adapters: [new WebCryptoSignerAdapter()],
    autoApprove: (request) => request.type === 'sign-transaction',
    autoConnect: true,
});

Note: RemoteCliAdapter and PasskeySignerAdapter never auto-sign regardless of this setting.

Using the CLI adapter

The Remote CLI adapter connects to your local sui CLI over HTTP. Private keys never leave the sui binary — only transaction bytes are sent for signing.

The easiest way is the standalone wallet:

npx @mysten-incubation/dev-wallet serve

The terminal prints a URL with an auth token (e.g. http://localhost:5174/?token=abc123). Open it in your browser — the token is saved automatically so popups can authenticate with the CLI signer.

To import a CLI account:

1. Click the + button on the Accounts tab (or go to Settings to verify the CLI Signer shows "Connected")
2. Switch to the Import tab in the Add Account dialog
3. Select the address you want from the list (these come from your sui keystore)
4. Click Import

The imported account now appears alongside your other wallet accounts. When a dApp requests a signature with that address, the transaction bytes are sent to the local sui keytool sign command — your private key never leaves the CLI.

Note: The CLI signer supports transaction signing only. Personal message signing (sui keytool sign only accepts TransactionData) will show an error. Use a WebCrypto or InMemory account for signPersonalMessage.

Bookmarklet

The standalone wallet also serves a bookmarklet for quick injection into any dApp. You can find it in the Settings tab — drag it to your bookmarks bar, or copy the console snippet from the terminal output. Clicking the bookmarklet on any page registers the standalone wallet without needing to modify the dApp's source code.

Imports

Limitations

• Not for production — emits a console warning when NODE_ENV=production
• RemoteCLI cannot sign personal messages — sui keytool sign only supports transaction data
• RemoteCLI and Passkey never auto-sign — they always require explicit interaction, regardless of the autoApprove setting