Get started with Wallet Kit

Wallet Kit makes it easy to build Galaxy Station functionality into your React application. It contains custom hooks that drastically simplify common tasks like connecting a wallet and triggering transactions for both Galaxy Station mobile and the Galaxy Station extension.

This guide covers how to set up a React app, integrate Wallet Kit, check the balance of the connected account, and call a token swap. If you want to integrate Galaxy Station into an existing React app, jump to the Wrap your app in WalletProvider section.

Prerequisites

• The latest version of the Galaxy Station Chrome extension (Galaxy Station Wallet 1.0.48 and above)
• NPM
• NVM
• Node.js version 16

💡Node version 16

Most users will need to specify Node version 16 before continuing. You can manage node versions with NVM.

_1

nvm install 16 nvm use 16

1. Project Setup

1. To get started, you'll need some basic React scaffolding. To generate this, run the following in your terminal:

   
   

   _2

   npx create-react-app my-terra-app

   _2

   cd my-terra-app

   
   

2. Then, install the @hexxagon/wallet-kit package:

   
   

   _1

   npm install @hexxagon/wallet-kit

   
   

2. Wrap your app in WalletProvider

Next, you'll wrap your App with <WalletProvider> to give all your components access to useful data, hooks, and utilities. You'll also need to pass in information about Terra networks, such as the mainnet or chainId, into the provider via getInitialConfig.

Navigate to your Index.js in a code editor and replace the code with the following:

_13

import ReactDOM from 'react-dom';

_13

import './index.css';

_13

import App from './App';

_13

import { getInitialConfig, WalletProvider } from '@hexxagon/wallet-kit';

_13

_13

getInitialConfig().then((defaultNetworks) => {

_13

ReactDOM.render(

_13

<WalletProvider defaultNetworks={defaultNetworks}>

_13

<App />

_13

</WalletProvider>,

_13

document.getElementById('root'),

_13

);

_13

});

3. Add support for station Mobile

To support Galaxy Station Mobile:

1. Install the @hexxagon/galaxy-station-mobile package:

   
   

   _1

   npm install @hexxagon/galaxy-station-mobile

   
   

2. Add GalaxyStationMobileWallet to the extraWallets array prop in the WalletProvider component.

   
   

   _17

   import ReactDOM from 'react-dom';

   _17

   import './index.css';

   _17

   import App from './App';

   _17

   import GalaxyStationMobileWallet from '@hexxagon/galaxy-station-mobile';

   _17

   import { getInitialConfig, WalletProvider } from '@hexxagon/wallet-kit';

   _17

   _17

   getInitialConfig().then((defaultNetworks) => {

   _17

   ReactDOM.render(

   _17

   <WalletProvider

   _17

   extraWallets={[new GalaxyStationMobileWallet()]}

   _17

   defaultNetworks={defaultNetworks}

   _17

   >

   _17

   <App />

   _17

   </WalletProvider>,

   _17

   document.getElementById('root'),

   _17

   );

   _17

   });

   
   

4. Start the application

Start the application to make sure it works:

_1

npm start

Your browser should open to http://localhost:3000/ and you should see the react logo with a black background and some text.

Polyfill errors

Getting polyfill errors?

To solve these errors, can downgrade react-scripts: 4.0.3 in your package.json and reinstall your dependencies as a quick fix:

1. Navigate to my-terra-app in your terminal and run the following:

   
   

   _1

   npm install [email protected] // its important to specify the version

   
   

2. Reinstall your dependencies:

   
   

   _1

   npm install

   
   

3. Restart your app:

   
   

   _1

   npm start

   
   

3. Create a new directory called components in the source directory. This directory will house components to trigger different actions from our connected wallet.

5. Put useWallet to work

Now that App.js has inherited the context of WalletProvider, you can start putting your imports to work. You'll use the multi-purpose useWallet and useConnectedWallet hooks to connect your Galaxy Station extension to your web browser.

1. Create a new component file called Connect.js.

2. Populate the Connect.js file with the following:

_29

import React from 'react';

_29

import { useConnectedWallet, useWallet } from '@hexxagon/wallet-kit';

_29

_29

function Connect() {

_29

const connectedWallet = useConnectedWallet();

_29

const { connect, disconnect, availableWallets } = useWallet();

_29

_29

return (

_29

<section>

_29

<h4>Connect info:</h4>

_29

{connectedWallet ? (

_29

<>

_29

<button onClick={() => disconnect()}>Disconnect</button>

_29

<code>

_29

<pre>{JSON.stringify(connectedWallet, null, 2)}</pre>

_29

</code>

_29

</>

_29

) : (

_29

availableWallets.map(({ id, name, isInstalled }) => (

_29

<button onClick={() => connect(id)} disabled={!isInstalled} key={id}>

_29

Connect {name}

_29

</button>

_29

))

_29

)}

_29

</section>

_29

);

_29

}

_29

_29

export default Connect;

3. Open App.js in your code editor and replace the code with the following:

_14

import './App.css';

_14

import Connect from './components/Connect';

_14

_14

function App() {

_14

return (

_14

<div className="App">

_14

<header className="App-header">

_14

<Connect />

_14

</header>

_14

</div>

_14

);

_14

}

_14

_14

export default App;

4. Refresh your browser. There should be some new text and buttons in your browser.

5. Make sure your Galaxy Station extension is connected to a wallet. Click Connect EXTENSION and the app will connect to your wallet.

The status, network, and wallets properties in your browser provide useful information about the state of the Terra wallet. Before connecting, the status variable will be WALLET_NOT_CONNECTED and upon connection, the status becomes WALLET_CONNECTED. In addition, the wallets array now has one entry with the connectType and terraAddress you used to connect.

You should be able to see these changes in real-time.

6. Query a wallet balance

It's common for an app to show the connected user's LUNA balance. To achieve this you'll need two hooks. The first is useLcdClient. An LCDClient is essentially a REST-based adapter for the Terra blockchain. You can use it to query an account balance. The second is useConnectedWallet, which tells you if a wallet is connected and, if so, basic information about that wallet such as its address.

Be aware that you will not see any tokens if your wallet is empty.

1. Create a file in your Components folder named Query.js.

2. Populate Query.js with the following:

   
   

   _26

   import { useConnectedWallet, useLcdClient } from '@hexxagon/wallet-kit';

   _26

   import React, { useEffect, useState } from 'react';

   _26

   _26

   export default function Query() {

   _26

   const lcd = useLcdClient(); // LCD stands for Light Client Daemon

   _26

   const connected = useConnectedWallet();

   _26

   const [balance, setBalance] = useState('');

   _26

   const chainID = 'phoenix-1'; // or any other mainnet or testnet chainID supported by station (e.g. osmosis-1)

   _26

   _26

   useEffect(() => {

   _26

   if (connected) {

   _26

   lcd.bank.balance(connected.addresses[chainID]).then(([coins]) => {

   _26

   setBalance(coins.toString());

   _26

   });

   _26

   } else {

   _26

   setBalance(null);

   _26

   }

   _26

   }, [connected, lcd]); // useEffect is called when these variables change

   _26

   _26

   return (

   _26

   <div>

   _26

   {balance && <p>{balance}</p>}

   _26

   {!connected && <p>Wallet not connected!</p>}

   _26

   </div>

   _26

   );

   _26

   }

   
   

3. Open App.js in your code editor and add import Query from './components/Query' to line 3, and <Query /> to line 10. The whole file should look like the following:

   
   

   _16

   import './App.css';

   _16

   import Connect from './components/Connect';

   _16

   import Query from './components/Query';

   _16

   _16

   function App() {

   _16

   return (

   _16

   <div className="App">

   _16

   <header className="App-header">

   _16

   <Connect />

   _16

   <Query />

   _16

   </header>

   _16

   </div>

   _16

   );

   _16

   }

   _16

   _16

   export default App;

   
   

4. Refresh your browser. Your wallet balance will appear in micro-denominations. Multiply by $10^6$ for an accurate balance.

7. Send a transaction

You can also create and send transactions to the Terra network while using Wallet Kit. You can use Feather.js to generate a sample transaction:

_1

npm install @hexxagon/feather.js

Before broadcasting this example transaction, ensure you're on the Terra testnet. To change networks, click the gear icon in your Galaxy Station extension, click on Networks, then select Testnets.

You can request testnet funds from the Terra Testnet Faucet.

To transfer LUNA, you will need to supply a message containing the sender address, recipient address, and send amount (in this case 1 LUNA), as well as fee parameters. Once the message is constructed, the post method on connectedWallet broadcasts it to the network.

📝What happens if something goes wrong?

Wallet Provider supplies useful error types. This example will handle the UserDenied error case, but you can find other cases for error handling on GitHub.

1. Create a file in your Components folder named Tx.js.

2. Populate Tx.js with the following. To make this example interchain retreive the baseAsset from the network object.

   
   

   _55

   import { MsgSend } from '@hexxagon/feather.js';

   _55

   import { useConnectedWallet, useWallet } from '@hexxagon/wallet-kit';

   _55

   import React, { useCallback, useState } from 'react';

   _55

   _55

   const TEST_TO_ADDRESS = 'terra12hnhh5vtyg5juqnzm43970nh4fw42pt27nw9g9';

   _55

   _55

   function Tx() {

   _55

   const [txResult, setTxResult] = useState(null);

   _55

   const [txError, setTxError] = useState('');

   _55

   _55

   const connectedWallet = useConnectedWallet();

   _55

   const wallet = useWallet();

   _55

   const chainID = 'phoenix-1';

   _55

   _55

   const testTx = useCallback(async () => {

   _55

   if (!connectedWallet) {

   _55

   return;

   _55

   }

   _55

   _55

   if (connectedWallet.network === 'mainnet') {

   _55

   alert(`Please only execute this example on Testnet`);

   _55

   return;

   _55

   }

   _55

   _55

   try {

   _55

   const transactionMsg = {

   _55

   chainID,

   _55

   msgs: [

   _55

   new MsgSend(connectedWallet.addresses[chainID], TEST_TO_ADDRESS, {

   _55

   uluna: 1, // parse baseAsset from network object and use here (e.g.`[baseAsset]`)

   _55

   }),

   _55

   ],

   _55

   };

   _55

   _55

   const tx = await wallet.post(transactionMsg);

   _55

   setTxResult(tx);

   _55

   } catch (error) {

   _55

   setTxError(

   _55

   'Error: ' + (error instanceof Error ? error.message : String(error)),

   _55

   );

   _55

   }

   _55

   }, [connectedWallet, wallet]);

   _55

   _55

   return (

   _55

   <>

   _55

   {connectedWallet && !txResult && !txError && (

   _55

   <button onClick={testTx}>Send 1USD to {TEST_TO_ADDRESS}</button>

   _55

   )}

   _55

   _55

   {txResult && <>{JSON.stringify(txResult, null, 2)}</>}

   _55

   {txError && <pre>{txError}</pre>}

   _55

   </>

   _55

   );

   _55

   }

   _55

   export default Tx;

   
   
   📝note

   Because all coins are denominated in micro-units, you will need to multiply any coins by $10^6$ . For example, 1000000 uluna = 1 LUNA.

3. Open App.js in your code editor and add import Tx from './components/Tx' to line 4, and <Tx /> to line 12. The whole file should look like the following:

   
   

   _18

   import './App.css';

   _18

   import Connect from './components/Connect';

   _18

   import Query from './components/Query';

   _18

   import Tx from './components/Tx';

   _18

   _18

   function App() {

   _18

   return (

   _18

   <div className="App">

   _18

   <header className="App-header">

   _18

   <Connect />

   _18

   <Query />

   _18

   <Tx />

   _18

   </header>

   _18

   </div>

   _18

   );

   _18

   }

   _18

   _18

   export default App;

   
   

4. After refreshing your browser, you'll see a new Send button. Click the button to send your transaction. Your Galaxy Station extension will ask you to confirm the transaction.