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ParityEdge
Ruby on Rails
Backend Runtimes

Ruby on Rails Backend Integration

Resolve visitor purchasing power parity pricing server-side in Rails controllers, Sinatra apps, and background billing jobs with sub-10ms Anycast edge resolution.

Production Rails Service with In-Memory Caching

Create a standalone service object with persistent connection pooling and automatic cache management:

# app/services/parity_pricing_service.rb
require 'faraday'

class ParityPricingService
  EDGE_API_URL = 'https://api.parityedge.app/v1/lookup'.freeze
  PROJECT_ID = 'prj_live_YOUR_KEY'.freeze

  def self.calculate(base_price, client_ip)
    parity = fetch_parity(client_ip)

    if parity && parity['eligible'] && parity['discountPercentage'].to_i > 0
      discount_multiplier = (100.0 - parity['discountPercentage'].to_f) / 100.0
      final_price = (base_price * discount_multiplier).round(2)
      { base_price: base_price, final_price: final_price, parity: parity }
    else
      { base_price: base_price, final_price: base_price, parity: parity }
    end
  end

  def self.fetch_parity(client_ip)
    cache_key = "parity_edge:#{client_ip}"

    Rails.cache.fetch(cache_key, expires_in: 10.minutes) do
      conn = Faraday.new(url: EDGE_API_URL) do |f|
        f.options.open_timeout = 0.5
        f.options.timeout = 1.0
        f.response :json
      end

      response = conn.get do |req|
        req.params['projectId'] = PROJECT_ID
        req.headers['x-forwarded-for'] = client_ip.to_s
      end

      response.success? ? response.body : nil
    rescue Faraday::Error => e
      Rails.logger.warn "[ParityEdge] Edge lookup timeout/error: #{e.message}"
      nil
    end
  end
end

Rails Controller & View Helper Integration

# app/controllers/pricing_controller.rb
class PricingController < ApplicationController
  def show
    client_ip = request.remote_ip
    @pricing = ParityPricingService.calculate(49.00, client_ip)

    respond_to do |format|
      format.html
      format.json { render json: @pricing }
    end
  end
end

# app/helpers/pricing_helper.rb
module PricingHelper
  def render_parity_banner(parity)
    return unless parity && parity['eligible']

    tag.div(class: 'p-3 rounded-xl bg-emerald-500/10 border border-emerald-500/20 text-emerald-600 text-xs font-semibold') do
      "Special #{parity['discountPercentage']}% discount automatically applied for visitors from #{parity['countryName']}!"
    end
  end
end

Production Architecture Highlights

Fail-Open Circuit Safety

Outbound timeouts default gracefully to standard baseline USD rates, ensuring your billing and checkout flows never crash.

Autonomous ASN Threat Inspection

The ParityEdge edge engine verifies Autonomous System Numbers (ASNs) against commercial hosting ranges, preventing automated geographic discount abuse.

Related Tools & Integration Guides

PPP Pricing Calculator →Python (FastAPI & Django) →Stripe Discount Injection →
← C# (.NET / ASP.NET)Next: Rust (Axum / Actix)