curl https://api.stripe.com/v1/terminal/connection_tokens \
  -u sk_test_4eC39HqLyjWDarjtT1zdp7dc: \
  -X POST

# Set your secret key. Remember to switch to your live secret key in production!
# See your keys here: https://dashboard.stripe.com/account/apikeys
Stripe.api_key = 'sk_test_4eC39HqLyjWDarjtT1zdp7dc'

# In a new endpoint on your server, create a ConnectionToken and return the
# `secret` to your app. The SDK needs the `secret` to connect to a reader.
Stripe::Terminal::ConnectionToken.create

# Set your secret key. Remember to switch to your live secret key in production!
# See your keys here: https://dashboard.stripe.com/account/apikeys
stripe.api_key = 'sk_test_4eC39HqLyjWDarjtT1zdp7dc'

# In a new endpoint on your server, create a ConnectionToken and return the
# `secret` to your app. The SDK needs the `secret` to connect to a reader.
stripe.terminal.ConnectionToken.create()

// Set your secret key. Remember to switch to your live secret key in production!
// See your keys here: https://dashboard.stripe.com/account/apikeys
const stripe = require('stripe')('sk_test_4eC39HqLyjWDarjtT1zdp7dc');

// In a new endpoint on your server, create a ConnectionToken and return the
// `secret` to your app. The SDK needs the `secret` to connect to a reader.
stripe.terminal.connectionTokens.create();

// Set your secret key. Remember to switch to your live secret key in production!
// See your keys here: https://dashboard.stripe.com/account/apikeys
\Stripe\Stripe::setApiKey('sk_test_4eC39HqLyjWDarjtT1zdp7dc');

// In a new endpoint on your server, create a ConnectionToken and return the
// `secret` to your app. The SDK needs the `secret` to connect to a reader.
\Stripe\Terminal\ConnectionToken::create();

// Set your secret key. Remember to switch to your live secret key in production!
// See your keys here: https://dashboard.stripe.com/account/apikeys
Stripe.apiKey = "sk_test_4eC39HqLyjWDarjtT1zdp7dc";

// In a new endpoint on your server, create a ConnectionToken and return the
// `secret` to your app. The SDK needs the `secret` to connect to a reader.
Map<String, Object> params = new HashMap<String, Object>();
ConnectionToken.create(params);

// Set your secret key. Remember to switch to your live secret key in production!
// See your keys here: https://dashboard.stripe.com/account/apikeys
stripe.Key = "sk_test_4eC39HqLyjWDarjtT1zdp7dc"

// In a new endpoint on your server, create a ConnectionToken and return the
// `secret` to your app. The SDK needs the `secret` to connect to a reader.
params := &stripe.TerminalConnectionTokenParams{}
connectiontoken, err := connectiontoken.New(params)

// Set your secret key. Remember to switch to your live secret key in production!
// See your keys here: https://dashboard.stripe.com/account/apikeys
StripeConfiguration.ApiKey = "sk_test_4eC39HqLyjWDarjtT1zdp7dc";

// In a new endpoint on your server, create a ConnectionToken and return the
// `secret` to your app. The SDK needs the `secret` to connect to a reader.
var options = new ConnectionTokenCreateOptions{};
var service = new ConnectionTokenService();
ConnectionToken connectionToken = service.Create(options);

function fetchConnectionToken() {
  // Your backend should call /v1/terminal/connection_tokens and return the JSON response from Stripe
  return fetch('https://{YOUR_BACKEND_URL}/connection_token', { method: "POST" })
    .then(response => response.json())
    .then(data => data.secret);
}

async function fetchConnectionToken() {
  // Your backend should call /v1/terminal/connection_tokens and return the JSON response from Stripe
  const response = await fetch('https://{YOUR_BACKEND_URL}/connection_token', { method: "POST" });
  const data = await response.json();
  return data.secret;
}

var terminal = StripeTerminal.create({
  onFetchConnectionToken: fetchConnectionToken,
  onUnexpectedReaderDisconnect: unexpectedDisconnect,
});

const terminal = StripeTerminal.create({
  onFetchConnectionToken: fetchConnectionToken,
  onUnexpectedReaderDisconnect: unexpectedDisconnect,
});

// Handler for a "Connect Reader" button
function connectReaderHandler() {
  const config = {simulated: true};
  terminal.discoverReaders(config).then(function(discoverResult) {
    if (discoverResult.error) {
      console.log('Failed to discover: ', discoverResult.error);
    } else if (discoverResult.discoveredReaders.length === 0) {
      console.log('No available readers.');
    } else {
      // Just select the first reader here.
      var selectedReader = discoverResult.discoveredReaders[0];

      terminal.connectReader(selectedReader).then(function(connectResult) {
        if (connectResult.error) {
          console.log('Failed to connect: ', connectResult.error);
        } else {
          console.log('Connected to reader: ', connectResult.reader.label);
        }
      });
    }
  });
}

// Handler for a "Connect Reader" button
async function connectReaderHandler() => {
  const config = {simulated: true};
  const discoverResult = await terminal.discoverReaders(config);
  if (discoverResult.error) {
    console.log('Failed to discover: ', discoverResult.error);
  } else if (discoverResult.discoveredReaders.length === 0) {
    console.log('No available readers.');
  } else {
    // Just select the first reader here.
    const selectedReader = discoverResult.discoveredReaders[0];

    const connectResult = await terminal.connectReader(selectedReader);
    if (connectResult.error) {
      console.log('Failed to connect: ', connectResult.error);
    } else {
      console.log('Connected to reader: ', connectResult.reader.label);
    }
  }
}