Affirm gem is a simple Ruby wrapper for Affirm.com API. Please check Affirm API documentation for more details.

Add this line to your application's Gemfile:

gem 'affirm-ruby', require: 'affirm'

And then execute:

$ bundle

Or install it yourself as:

$ gem install affirm-ruby

Affirm.configure do |config|
  config.public_api_key  = "ABC"
  config.private_api_key = "XYZ"
  config.environment     = :sandbox # or :production (default if not specified)
end

To authorize a charge checkout_token is required. This token gets POSTed to user_confirmation_url that is setup in Checkout JavaScript object.

Affirm::Charge.authorize(checkout_token)

The rest of the API uses charge_id which is received as id after charge is authorized.

Affirm::Charge.find("TEST-AL04-UVGR")

Affirm::Charge.capture("TEST-ALO4-UVGR")

Affirm::Charge.void("TEST-ALO4-UVGR")

Affirm::Charge.refund("TEST-ALO4-UVGR", amount: 500)

Affirm::Charge.update("TEST-ALO4-UVGR",
  order_id: "CUSTOM_ORDER_ID",
  shipping_carrier: "USPS",
  shipping_confirmation: "1Z23223"
)

Failed response will return error object as a plain ruby object with values coerced in corresponding types.

The same will happen for all successful responses described (not in full) in server integration guide.

response = Affirm::Charge.authorize(checkout_token)
if response.success?
  charge_id = response.id
  # save charge_id
else
  puts response.error.message
end

1. Fork it ( https://github.com/spectator/affirm/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request