Connect で決済フォームへのリンクを作成

# Using Sinatra.
require 'sinatra'
require 'stripe'

set :port, 4242

# Set your secret key. Remember to switch to your live secret key in production.
# See your keys here: https://dashboard.stripe.com/apikeys
Stripe.api_key = 
'sk_test_BQokikJOvBiI2HlWgH4olfQ2'

# If you are testing your webhook locally with the Stripe CLI you
# can find the endpoint's secret by running `stripe listen`
# Otherwise, find your endpoint's secret in your webhook settings in
# the Developer Dashboard
endpoint_secret = 'whsec_...'

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

  event = nil

  # Verify webhook signature and extract the event.
  # See https://stripe.com/docs/webhooks#verify-events for more information.
  begin
    event = Stripe::Webhook.construct_event(
      payload, sig_header, endpoint_secret
    )
  rescue JSON::ParserError => e
    # Invalid payload.
    status 400
    return
  rescue Stripe::SignatureVerificationError => e
    # Invalid Signature.
    status 400
    return
  end

  if event['type'] == 'checkout.session.completed'
    session = event['data']['object']
    connected_account_id = event['account']
    handle_completed_checkout_session(connected_account_id, session)
  end

  status 200
end

def handle_completed_checkout_session(connected_account_id, session)
  # Fulfill the purchase
  puts 'Connected account ID: ' + connected_account_id
  puts session.to_s
end