Precision checkout rules for payments & delivery.
WS Checkout Control is a Dockerized embedded Shopify app that lets merchants conditionally hide, rename, and reorder payment methods, shipping rates, local delivery, and pickup points dynamically during checkout.
If Subtotal > $1,000 → MOVE Direct Bank Transfer to #1 & HIDE Credit Cards.
If ZIP outside allowed list → HIDE Local Pickup option.
If Customer Tag = "wholesale" → RENAME Shipping to "Freight Carrier Net 30".
Control every payment & delivery option.
Engineered for high-volume stores, B2B merchants, multi-market operations, and stores requiring conditional checkout logic.
Payment & delivery customization
Hide, rename, and reorder payment methods, shipping rates, local delivery, and pickup options dynamically.
Multi-signal condition engine
Filter by cart total, currency, quantity, weight, address, country, province, ZIP, customer state, B2B, customer tags, and SKUs.
Privacy-minimizing IP signals
Storefront signals classify buyer IP addresses in server memory without saving raw IP logs to the database.
High-value & pickup presets
Pre-built workflows for prioritizing direct bank transfers on large orders and restricting local pickup by postal area.
Native Shopify Functions
Executes high-performance payment and delivery logic directly inside Shopify checkout via WebAssembly.
Simulator & fail-open protection
Test rules interactively before syncing; built-in fail-open logic ensures checkout continuity for every buyer.
Comprehensive signal evaluation.
Combine conditions with ALL (AND) or ANY (OR) groups, numerical priority ordering, and real-time evaluation.
Cart subtotal amount, currency, total item quantity, line count, total weight, physical/digital item contents.
Shipping destination country, province, city, ZIP/postcode, customer state, B2B company status, and customer tags.
Specific product IDs, variant IDs, SKU codes, vendor names, product types, and selected delivery option.
Storefront locale signals, IP policy classification labels (EU, proxy, regional), and arbitrary cart attributes.
HIDE options, RENAME display titles on the fly, and MOVE methods to specific numerical priority positions.
Interactive simulator, fail-open execution model, anti-hide-all safety locks, and audit revision history.
Important Payment Limitation
The app controls payment methods Shopify already offers at checkout. It does not create a payment gateway, process a bank transfer, or add a new payment method.
- High-value orders: First enable a manual payment method (e.g. Direct Bank Transfer) in Shopify Settings → Payments, then create rules that prioritize that method and hide selected card methods above the desired threshold.
- Accelerated checkout options: Shopify applies plan and geographic restrictions to some payment operations; hiding accelerated checkout options (like Shop Pay, Apple Pay, Google Pay) through a custom app requires Shopify Plus.
First Merchant Setup Checklist
- Install the app and grant
write_payment_customizations,write_delivery_customizations, andwrite_app_proxypermissions. - Enable every payment method that rules should control in Shopify Settings → Payments.
- Open WS Checkout Control, review disabled preset rules, and replace target names/thresholds with store values.
- Enable desired rules and press Synchronize.
- Enable the WS Checkout Signals app embed in Online Store theme settings for IP & tag signals.
- Run representative checkout tests for every active market, currency, language, and delivery option.
Technical & Local Setup
Node.js 22+, pnpm 10.18+, PostgreSQL, Shopify Partner app, and development store.
cp .env.staging.example .env.staging
pnpm install --no-frozen-lockfile
pnpm run prisma:generate
pnpm run migrate
pnpm run update:config:staging
pnpm run deploy:staging
pnpm run devNeed a Shopify or web development partner?
Tell us what you are planning, where the current setup falls short, and what success looks like.