Three lenses on the same engine: what customers do, how scarcity is enforced, and exactly what happens between 10:00 AM and payment confirmation.
Bind a valid Indian PIN code as your primary commercial zone. Light KYC for customers; full GST/PAN KYC for dropshippers and distributors.
Products show as Upcoming, Live, Available in My PIN, Selling Fast, Sold Out in My PIN, Available in Other PINs or Exchange Only.
Pre-booking also consumes the scarcity lock, so the piece is yours the moment the drop goes live.
GST invoice plus a QR digital certificate confirming One PIN One Piece ownership, downloadable in the app.
Available, reserved, cashback, bonus and commission balances on a hash-chained, tamper-evident ledger.
A unique link and code at registration, shareable on WhatsApp, SMS, email and social.
Statuses from Payment Received to Delivered plus exchange stages, pushed via app, SMS, email and WhatsApp.
Scarcity is a database guarantee, enforced at every write path — listing, add-to-cart, checkout, payment confirmation, dropship orders and admin-created orders.
A Redis lock resolves contention in real time while a PostgreSQL UNIQUE constraint on SKU + PIN acts as the final authority.
Concurrent same-PIN users see live queue position, ETA and countdown; a lapsed hold releases the piece to the next person.
GPS and address checks, device fingerprinting, and admin-approved PIN changes stop people faking a new zone.
Drops auto-flip Upcoming → Live at the scheduled time, subject to stock, PIN and scarcity rules.
Targets 10,000 concurrent users per drop, sub-500 ms checkout and under-1 s queue updates at 99.9% uptime.
Immutable event logs cover every scarcity, wallet, stock and fund operation.
| Stage | What you see | What the system does |
|---|---|---|
| T−24h | Upcoming with countdown | Launch scheduled per product, collection or drop |
| 10:00:00 | Status flips to Live | Availability computed against your PIN's scarcity record |
| Add to cart | 3-minute hold timer | Redis lock grants an exclusive checkout window |
| Contention | Queue position and ETA | FIFO queue; hold passes on expiry, cycle repeats |
| Checkout | Wallet redemption + exchange consent | Consent stored with timestamp, order, IP/device, policy version |
| Payment | UPI, cards, net banking, wallets | Webhook verification, idempotent capture, retry handling |
| Confirmed | Invoice, certificate, cashback | Scarcity lock committed; fulfilment routed to mapped stockist |
| Delivery | Track Order updates | Distributor receives paid orders only, by PIN serviceability |
You must accept the policy before every payment — checkout is blocked without consent.
Cashback lands in your wallet on payment success; COD orders are excluded.
Unique number and QR with SKU, brand, order, date and PIN — verifiable by admin.