Auto-Delivery System

Some products have to be delivered in bulk, fast, right after a purchase. Doing that by hand does not scale. So I built a system that handles the whole delivery on its own.

A buyer gets a license key after they pay. They redeem it, and a multi-threaded delivery engine gets to work - spreading the job across many worker threads, tracking progress, and showing a live ETA. The key system is full-featured too: keys have usage limits, expiry dates, and can be locked to one server or one user.

• License-key system with usage limits, expiry and server/user locks
• Multi-threaded delivery engine with a live ETA
• A Flask web dashboard showing delivery progress in real time
• Store webhooks that mint a key the moment an order is paid

The hard part of automation is not the happy path. It is everything that goes wrong. So this system is built to keep going.

It handles the store's authorization flows itself, retries failed steps with backoff, and refreshes expired access on the fly so a job does not die halfway. It uses TLS fingerprinting and real client headers to look like a normal request, keeps its whole state in simple files, and remembers what it already delivered so it never does the same order twice.

• Reverse-engineered authorization flows handled end to end
• Auto-retry with backoff and on-the-fly access refresh
• TLS fingerprint spoofing to look like a real client
• Remembers finished orders so nothing is delivered twice