Client project · Regulated e-commerce
Regulated E-Commerce with Weight-Based Inventory
Launched a store for a regulated brand where every pack size sells from one shared stock count and the owner runs orders, promotions and reporting from one dashboard.
- Client
- Gas Lit Legacy
- Industry
- Regulated e-commerce
- Timeline
- Jul 2025 to present
- Year
- 2025
- Platforms
- Web
Results at a glance
The challenge
Baseline · flower catalog page, phone80.9 MBof product photos to scroll the page, before the fix
- Offering checkout that works for a regulated product category once card payments were no longer an option
- Selling one product in up to 6 pack sizes, from 3.5 g to 112 g, from a single shared stock pool without overselling
- Letting the owner edit products, prices and stock without developer help
- Running promotions and ad campaigns in a category where platform advertising is restricted
- Keeping product pages discoverable in search, even when items sell out
- Hardening checkout and the admin area after a security audit
- Keeping a photo-heavy catalog light on phones when product photos are uploaded straight from a camera
About the project
Gas Lit Legacy sells cannabis flower, vapes, edibles, concentrates and merch online. We built its store on Next.js with a headless Contentful catalog the owner edits without a developer, filterable by category, effect and strain. Checkout runs on Cash App, Venmo, PayPal and Zelle, with the owner confirming each payment. Customers get accounts with order history and tracking; the owner gets an admin console for orders, customers and promotions, plus a reporting dashboard. The store has been live since July 2025 and was relaunched on a new brand design system in 2026. In October 2026 an audit-and-fix pass covered security, speed, accessibility and search, and cut the photo data of a catalog page on a phone by 97%.
What we delivered
Scope
- Headless storefront
- Payment-app checkout
- Weight-based inventory
- Promo code engine
- Admin & reporting
- Image performance
- Accessibility
- Security hardening
- Technical SEO
- 2026 brand redesign
What it does
A catalog the owner edits
Products, sizes, prices, photos and stock live in Contentful, so the owner changes them without a developer. Shoppers filter by category, effect and strain, every listing links every product, and sold-out products stay visible (and indexable) but can't be bought. A size typed without a name or a price is held back from sale, and the admin pages list it with a link to fix it.
Payment-app checkout
Customers pay by Cash App, Venmo, PayPal or Zelle. The order is saved first, and the owner marks it paid once the money arrives. The cart shows the price the order will be charged, the submit button locks while the order is sent, and the server refuses the same order again within 5 minutes.
Weight-based inventory
Each product has one stock count in grams (or units). Buying a pack subtracts its weight, from 3.5 g to 112 g; a cancelled or deleted order puts it back; and the server checks the stock before it takes an order.
Promotions
Percentage or flat discount codes with date windows and usage caps, and shareable ad links on a promo subdomain that apply the code automatically at checkout.
Customer accounts
Customers get order history and order tracking, and the cart suggests products to rebuy.
Admin and reporting
The owner manages orders, tracking numbers, customers and promo codes, and a Reports page shows revenue, payment split, product breakdown and promo performance by week, month, quarter or year, with comparisons to the previous period.
Light on phones
Every product photo is fetched resized for the screen it is shown on, never as the camera upload, and a product page asks for its main photo first. The flower catalog went from 80.9 MB to 2.5 MB of photos on a phone.
Found in search
Product, Offer, Breadcrumb, ItemList, FAQ and Store structured data, canonical URLs, a sitemap that follows the catalog without a deploy, a share picture on every page, and a web app manifest.
Our approach
Built checkout around Cash App, Venmo, PayPal and Zelle: the order is saved first, the owner marks it paid once the money arrives, the submit button locks while the order is sent, and the server refuses the same order again within 5 minutes
Designed weight-based inventory: every pack draws its weight from one shared pool per product, cancellations and deletions restore it, and the server checks the stock before it takes an order
Moved the catalog to Contentful so the owner edits products, prices and stock without a developer, and made the site hold back any size typed without a name or price and list it in the admin
Built a promo engine with percentage or flat discounts, date windows and usage caps, plus shareable ad links on a promo subdomain that apply the code automatically
Added Product, Offer, Breadcrumb, ItemList, FAQ and Store structured data and a sitemap that follows the catalog, and kept sold-out pages visible and indexable while blocking their purchase
Ran 2 security audits and hardened the store: prices recalculated on the server, admin pages and actions checked on the server, every request's input checked against a schema, order records written only by the server, each customer's orders and profile readable only by that customer, security headers and a content security policy, and a security test suite
Made every photo request a resized one (at most 2000 px wide), sized each photo for the screen it is shown on, and shrank the 250 oversized uploads already in the catalog
Inside the project
Select a screenshot to view it full size.
A headless catalog customers can filter by category, effect and strain
Every order in one list, filtered by status (customer names and contact details changed)
A year of revenue, best sellers and slow sellers on one page (dollar figures and counts hidden)
Promo codes with share links and start and end dates (use counts hidden)
The 2026 brand design system, carried across every page
Before: the store's first design, replaced in the 2026 redesign
The outcome
- Live since July 2025, taking orders through 4 payment apps with no card processor
- Catalog pages download 97% less photo data: the flower catalog went from 80.9 MB to 2.5 MB of photos on a phone, and a product page from 1,364 KB to 405 KB
- Catalog pages no longer jump while they load: their layout shift went from 0.871 to 0 on the live store
- Shrank 250 oversized catalog photos from 844 MB to 100 MB in all (88% smaller), checked by eye, so editors can keep uploading straight from a camera
- Screen readers can name every button, select and link on 8 key pages: 72 unnamed or mislabeled controls fixed, and none left in a scan of the live store
- 100 Lighthouse SEO and best practices and 96 accessibility on 4 key pages of the live store (mobile, Oct 2026), with rich product data for search engines
- Stock is counted in grams across every pack size, and checked on the server before an order is taken
- An admin console and reporting dashboard where the owner runs orders, promotions and customers, and compares revenue period over period
- 717 unit tests and 67 end-to-end tests run on every code change before it merges
- Maintained since July 2025, including a full brand redesign in 2026 and an audit-and-fix pass in October 2026
Built with
Next.js
React
TypeScript
Tailwind CSS
Supabase
Contentful
TanStack Query
Resend
Vercel- Playwright
Vitest
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