AmberMarket
Every signal is a market
Demo
About
The problem it solves # AmberMarket – Every signal is a market ## The Problem It Solves **Every signal is a market. Every junction is an asset.** AmberMarket transforms **real-world traffic data** into **on-chain prediction markets** grounded in something measurable, verifiable, and live: *how many vehicles cross a junction during a single green-light window.* No abstract outcomes. No human referees. Just a CV oracle watching actual CCTV streams and settling bets automatically. **What you can do with AmberMarket:** - **Stake on live traffic** — Place $AMBER bets on real-time junction vehicle counts, settled by a YOLO-powered computer vision oracle reading live camera feeds. Transparent, automated, tamper-resistant. - **Own a junction** — Mint an **AmberJunctionNFT** to claim ownership of a real-world intersection and earn royalties every time others bet on your junction. - **Get a Web3 identity** — Claim a free **`.ambermarket.eth`** ENS subname and appear across leaderboards and live markets with a human-readable name. - **Trust the machine, not the middleman** — Smart contracts hold all funds; the oracle provides the count; winners are paid by tolerance (e.g. +-15% or exact). Zero manual intervention. The stack in one line: Real-time CV data + on-chain prediction markets + automated oracle settlement + ENS identity, all wired together in a single hackathon build.
How it's made
Challenges we ran into ## Challenges We Ran Into **1. Bridging Python CV and a Node backend** The vehicle-counting pipeline runs on Python (YOLO + OpenCV), while the rest of the stack is Node.js + Socket.io. Rather than splitting into two long-running services, we spawn the CV pipeline as a **subprocess** and consume JSON lines from stdout, keeping the server single-process while still streaming live counts to clients. Getting clean shutdown, timeouts, and graceful fallbacks (a "fake mode" for when YOLO is not installed) took a few iterations to get right. **2. ENS subnames via Namespace** We wanted free `.ambermarket.eth` identities with no gas cost for users. The Namespace offchain manager requires **domain-scoped API keys**, something we discovered the hard way after hitting repeated 401s with a default key. Switching to `domainApiKeys: { [ENS_PARENT_NAME]: NAMESPACE_API_KEY }` fixed it. We also added rate-limiting (10-minute claim cooldown) and proper UI differentiation between "subname not found" and "API unavailable" for a cleaner demo experience. **3. Taming real CCTV streams** Caltrans D3 HLS streams are not framed for lane-level counting. They capture wide scenes with sidewalks, adjacent lanes, and irrelevant zones. We introduced a **per-junction viewport config** (e.g. `0.30,0.40,0.70,0.90`) so the CV model only counts within a defined region of the frame. This meaningfully reduced false positives and made counts accurate enough to actually settle bets on. **4. Phase loop and frontend sync** The server drives a strict market cycle: **RED_OPEN > GREEN_COUNTING > SETTLING**, broadcast over Socket.io. Keeping the client's countdown timers, bet-open/closed states, and settlement modals in sync with backend phase (and on-chain state when the oracle is active) required a single authoritative source of truth and clearly named events, so the UI never showed "Place Bet" after the market had already locked.