How to Integrate Stripe Payment Intent API in Ruby

Integrate Stripe Payment Intent API in Ruby

• Ensure you have installed the Stripe gem in your Ruby application. You can add this to your Gemfile:

gem 'stripe'

• Configure your Stripe API keys. This is typically done in an initializer file, where you set your Stripe secret key:

Stripe.api_key = 'your_secret_key'

• To create a Payment Intent, initiate a request to Stripe's API. Payment Intents represent a payment lifecycle:

intent = Stripe::PaymentIntent.create(
  amount: 1099,  # Amount in cents
  currency: 'usd',
  payment_method_types: ['card'],
)

• Send the client secret to your front-end application to complete the payment process client-side:

intent.client_secret

• In your client-side application, use the Stripe.js library to confirm the payment, using the client secret:

const stripe = Stripe('your_publishable_key');

stripe.confirmCardPayment(clientSecret, {
  payment_method: {
    card: cardElement,
    billing_details: {
      name: 'customer name',
    },
  }
}).then(function(result) {
  if (result.error) {
    // Display error.message in your UI.
  } else {
    // The payment has been processed!
    if (result.paymentIntent.status === 'succeeded') {
      // Show success message or handle post-payment logic
    }
  }
});

• After receiving a successful payment confirmation, handle post-payment actions (e.g., updating order status, sending confirmation emails) in your server-side Ruby application.

• For security, implement Stripe webhooks to confirm the payment's completion server-side. You receive an event when a Payment Intent changes state:

require 'sinatra'
require 'stripe'

Stripe.api_key = 'your_secret_key'

post '/webhook' do
  payload = request.body.read
  sig_header = request.env['HTTP_STRIPE_SIGNATURE']
  event = nil

  begin
    event = Stripe::Webhook.construct_event(
      payload, sig_header, YOUR_ENDPOINT_SECRET
    )
  rescue JSON::ParserError => e
    status 400
    return
  rescue Stripe::SignatureVerificationError => e
    status 400
    return
  end

  # Handle the event
  case event.type
  when 'payment_intent.succeeded'
    payment_intent = event.data.object
    # Fulfill the purchase, update your database etc.
  end

  content_type 'application/json'
  {status: 'success'}.to_json
end

• Test the integration thoroughly with Stripe's test mode to ensure payment workflows function smoothly, before switching to live keys.