Instant Payment

Instant Payment

Setup transaction

Call SetExpressCheckout using this code and let user redirect to the given redirect URI.

request = Paypal::Express::Request.new(
  :username   => SET_YOUR_OWN,
  :password   => SET_YOUR_OWN,
  :signature  => SET_YOUR_OWN
)
payment_request = Paypal::Payment::Request.new(
  :currency_code => :JPY, # if nil, PayPal use USD as default
  :amount        => SET_YOUR_OWN,
  :description   => SET_YOUR_OWN
)
response = request.setup(
  payment_request,
  YOUR_SUCCESS_CALBACK_URL,
  YOUR_CANCEL_CALBACK_URL
)
response.redirect_uri

Assume the end-user approved the payment request on PayPal.com and redirect back to your site.
In the redirect back request, you get token and PayerID in query string.

Get Payment details

Call GetExpressCheckoutDetails using this code and ask the user for final approval.

response = request.details(token)
# inspect these attributes for more details
response.payer
response.amount
response.ship_to
response.payment_responses

Complete the transaction

Call DoExpressCheckoutPayment using this code.

response = request.checkout!(
  token,
  payer_id,
  payment_request
)
# inspect this attribute for more details
response.payment_info