Provider

The Cosmostation browser extension supports multiple blockchains and exposes chain-specific providers for dApp integration.

This section describes how to integrate Cosmostation Extension with Sui, using either the official Sui dApp Kit or plain (vanilla) JavaScript.

Sui Provider

When the Cosmostation extension is installed, a Sui-compatible wallet provider is injected into the browser.

This provider follows the Sui wallet standard and is designed to work seamlessly with ecosystem tooling, including Sui dApp Kit (@mysten/dapp-kit).

From a dApp’s perspective, Cosmostation behaves like any other standard Sui wallet, allowing applications to remain wallet-agnostic.

Sui dApp Kit (`@mysten/dapp-kit`)

Sui dApp Kit is the official React-oriented toolkit provided by Mysten Labs for building Sui dApps.

Cosmostation is fully compatible with this toolkit.

When you integrate Cosmostation via the dApp Kit:

Wallet discovery and selection are handled automatically
Connection state and accounts are managed through React hooks
Wallet features are accessed via standardized APIs
No Cosmostation-specific branching logic is required

This allows your application to interoperate with multiple Sui wallets through a single, unified interface.

The dApp Kit is especially suitable when you are building:

React or Next.js based applications
Production-grade Sui dApps
Wallet-agnostic user experiences

Official Documentation

For detailed API references, hooks, and architecture, refer to the official Sui dApp Kit documentation:

Supported Features

Cosmostation’s Sui provider follows the Sui wallet standard feature model and exposes the following capabilities.

Category	Feature Key	Version	Method / Entry	Description
Connection	`standard:connect`	`1.0.0`	`connect()`	Establishes a connection with the wallet and returns the available `accounts` (address, publicKey, chains, and supported features).
Events	`standard:events`	`1.0.0`	`on(event, handler)`	Subscribes to wallet events via the standard event interface.
Signing	`sui:signTransactionBlock`	`1.0.0`	`signTransactionBlock(...)`	Signs a Sui TransactionBlock payload without executing it.
Signing	`sui:signTransaction`	`2.0.0`	`signTransaction(...)`	Signs a Sui Transaction payload (v2 API).
Execute	`sui:signAndExecuteTransactionBlock`	`1.0.0`	`signAndExecuteTransactionBlock(...)`	Signs and executes a TransactionBlock in one step.
Execute	`sui:signAndExecuteTransaction`	`2.0.0`	`signAndExecuteTransaction(...)`	Signs and executes a Transaction (v2 API) in one step.
Message	`sui:signMessage`	`1.0.0`	`signMessage(...)`	Signs an arbitrary message for off-chain authentication or verification.
Message	`sui:signPersonalMessage`	`2.0.0`	`signPersonalMessage(...)`	Signs a personal-message format commonly used in wallet login flows.

Vanilla JavaScript Integration

If you choose not to use Sui dApp Kit, you can access the Sui provider directly from the injected window.cosmostation object.

This approach is suitable for:

Lightweight integrations
Non-React environments
Custom application architectures

Accessing the Provider

const sui = () => {
  if ('cosmostation' in window) {
    return window.cosmostation.sui;
  } else {
    window.open('https://cosmostation.io/wallet/#extension');
    /**
     * or:
     * window.open(
     *   'https://chrome.google.com/webstore/detail/cosmostation/fpkhgmpbidmiogeglndfbkegfdlnajnf'
     * );
     */
  }
};
 
const provider = sui();

Typical Use Cases

With the Sui provider, your dApp can:

Request wallet connections
Access the active Sui account
Sign and execute transactions
Sign messages for off-chain verification
React to wallet-driven account changes

While the integration style differs between dApp Kit and vanilla usage, the underlying wallet behavior remains consistent.

Event Connect & Get Accounts