The Ravelin gem is a Ruby wrapper for the Ravelin API. Ravelin is a fraud detection tool. See https://ravelin.com for more information.

Add this line to your application's Gemfile:

gem 'ravelin'

And then execute:

$ bundle

Or install it yourself as:

$ gem install ravelin

### Authentication

First thing to do is create a client with your Ravelin API key.

client = Ravelin::Client.new(api_key: 'sk_test_XXX')

An alternative client can be used to call Ravelin via an HTTP Proxy server that supports basic auth.

• In order to use the alternative ProxyClient, you must have an HTTP Proxy running.
• For the purpose of this example, we will use the url: https://ravelin-proxy.com.
• All requests to https://ravelin-proxy.com/ravelinproxy must have their basic auth header replaced with the Ravelin token in your HTTP proxy service, then forwarded the entire request to the Ravelin API.

Example of creating the proxy client:

c = Ravelin::ProxyClient.new(base_url: 'https://ravelin-proxy.com', username:'foo', password:'bar')

The Ravelin gem uses Faraday under the hood. The Faraday adapter and request timeout can be configured with the following:

require 'ravelin'
require 'net/http/persistent'

Ravelin.faraday_adapter = :net_http_persistent  # default is :net_http
Ravelin.faraday_timeout = 10                    # default is 1 second

Events require an event name and payload as named arguments. There is also an optional timestamp argument if your event occurred at a different time. The score argument will return a score for that User from Ravelin.

client.send_event(
  name: :customer,
  timestamp: Time.now,
  score: true,
  payload: {
    # ...
  }
)

• :customer
• :order
• :payment_method
• :pre_transaction
• :transaction
• :login
• :checkout
• :chargeback
• :voucher
• :voucher_redemption

Information about the payload parameters for each event can be found in the Ravelin docs (ravelins voucher & voucher_redemption docs not yet released) and by checking out the Ravelin::RavelinObject classes in the gem source code.

Note: The payload parameter names should use underscore formatting, not camelcase formatting.

# Send a customer event

client.send_event(
  name: :customer,
  payload: {
    customer: {
      customer_id: 'cus_123',
      given_name:  'Joe',
      family_name: 'Fraudster',
      location: {
        street1:     '123 Street Lane',
        city:        'London',
        postal_code: 'SW1A 0AA',
        country:     'GBR'
      }
    }
  }
)

# Send an order event

client.send_event(
  name: :order,
  payload: {
    customer_id: 'cus_123',
    order: {
      order_id: 'ord_123',
      currency: 'GBP',
      price:    1000,
      from: {
        street1:     '123 Street Lane',
        postal_code: 'SW1A 0AA',
        country:     'GBR'
      },
      to: {
        street1:     '123 Street Lane',
        postal_code: 'SW1A 0AA',
        country:     'GBR'
      },
      items: [
        { sku: 'itm_1', quantity: 1 },
        { sku: 'itm_2', quantity: 1 }
      ]
    }
  }
)

# Send a voucher event

client.send_event(
  name: :voucher,
  payload: {
    voucher_code: 'TEST123',
    expiry: Time.now + 1,
    value: 500,
    currency: 'GBP',
    creation_time: Time.now,
    voucher_type: 'REFERRAL',
    referrer_id: '1',
    referral_value: 500
  }
)

# Send a voucher redemption event

client.send_event(
  name: :'paymentmethod/voucher',
  payload: {
    customer_id: 123983,
    voucher_redemption: {
      payment_method_id: 'voucher:12345',
      voucher_code: 'FOOBAR9835',
      referrer_id: '1',
      expiry: Time.now + 1,
      value: 500,
      currency: 'GBP,
      voucher_type: 'REFERRAL',
      redemption_time: Time.now - 1,
      success: false,
      failure_source: :CLIENT, 
      failure_reason: :EXPIRED
    }
  }
)

client.send_event(
  name: :'paymentmethod/voucher',
  payload: {
    customer_id: 123983,
    voucher_redemption: {
      payment_method_id: 'voucher:12345',
      voucher_code: 'FOOBAR9835',
      referrer_id: '1',
      expiry: Time.now + 1,
      value: 500,
      currency: 'GBP,
      voucher_type: 'REFERRAL',
      redemption_time: Time.now - 1,
      success: true,
    }
  }
)

Backfill events are designed to be used to populate Ravelin with historical data. The Ravelin backfill event API is identical to the regular event API, other than that the backfill event API is not subject to the standard rate limits.

See https://developer.ravelin.com/#backfill for more information.

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/deliveroo/ravelin. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

The gem is available as open source under the terms of the MIT License.