Get started with React Native

Use this prompt to get started quickly.

These examples connect to signet so you can test for free. To go live, point the same configuration at Second’s mainnet endpoints from Test on mainnet and select the mainnet network.

Prerequisites

React Native 0.74+ with the New Architecture enabled
iOS 13+ / Android API 24+
For Expo: a development build (Expo Go is not supported)

Getting started

Install the SDK

Expo
Bare React Native

npx expo install @secondts/bark-react-native

Add the plugin to your app.json:

{
  "expo": {
    "plugins": ["@secondts/bark-react-native"]
  }
}

Then prebuild:

npx expo prebuild

npm install @secondts/bark-react-native

For iOS, install the CocoaPods dependencies:

cd ios && pod install && cd ..

If you use pnpm v10+, run pnpm approve-builds and select @secondts/bark-react-native to allow the postinstall script.

Create a wallet

Generate a BIP39 mnemonic, configure the wallet for signet, and initialize it.

Expo
Bare React Native

import {
  generateMnemonic,
  Config,
  Network,
  Wallet,
} from '@secondts/bark-react-native';
import { Directory, Paths } from "expo-file-system";

const BARK_DIR = ".bark";

// Generate a new mnemonic
const mnemonic = generateMnemonic();
console.log('Mnemonic:', mnemonic);

// Configure for signet
const config = Config.create({
  serverAddress: 'https://ark.signet.2nd.dev',
  esploraAddress: 'https://esplora.signet.2nd.dev',
  network: Network.Signet,
});

// Create the wallet
const dataDir = new Directory(Paths.document, BARK_DIR);
if (!dataDir.exists) dataDir.create();
const dataPath = dataDir.uri.replace("file://", "").replace(/\/+$/, "");
const wallet = await Wallet.create(mnemonic, config, dataPath, false);

import {
  generateMnemonic,
  Config,
  Network,
  Wallet,
} from '@secondts/bark-react-native';
import RNFS from 'react-native-fs';

// Generate a new mnemonic
const mnemonic = generateMnemonic();
console.log('Mnemonic:', mnemonic);

// Configure for signet
const config = Config.create({
  serverAddress: 'https://ark.signet.2nd.dev',
  esploraAddress: 'https://esplora.signet.2nd.dev',
  network: Network.Signet,
});

// Create the wallet
const dataDir = `${RNFS.DocumentDirectoryPath}/bark_wallet`;
await RNFS.mkdir(dataDir);
const wallet = await Wallet.create(mnemonic, config, dataDir, false);

Back up the mnemonic securely, and back up wallet data continuously. Both are required to restore a wallet.

Get a receiving address

Generate an Ark address to receive bitcoin.

const address = await wallet.newAddress();
console.log('Ark address:', address);

Send some signet sats to this address using the faucet.

Check your balance

Sync the wallet with the Ark server and read your balance.

await wallet.sync();

const balance = await wallet.balance();
console.log('Spendable:', balance.spendableSats, 'sats');

Next steps

Source and examples

Full React Native source and example projects on GitLab.

How Ark works

Learn about the protocol powering your wallet.

​Prerequisites

​Getting started

​Next steps

Source and examples

How Ark works

Prerequisites

Getting started

Next steps