coldchain-web

Public website and operator interfaces for April Gate — tamper-evident cold chain verification on Solana.

This repository contains the user-facing surface: marketing site, operator dashboard, and shipment verification portal. The on-chain programs live in coldchain-programs; the ZK consensus engine lives in coldchain-core.

Status

Hackathon MVP. Currently static HTML for the public marketing surface. Interactive functionality is being built incrementally:

• Public site (static)
• Device registration via Phantom wallet (in progress)
• Shipment creation and assignment dashboard
• Public shipment verification portal (lookup by program account address)
• Proof submission interface

Architecture

The website is a thin client over the on-chain program. Every interactive flow:

1. Connects to the user's Solana wallet (Phantom)
2. Derives the relevant PDA client-side using the same seed structure as the on-chain program
3. Calls the corresponding instruction on device_registry (program ID APRu6WGxe1NC4X2FrcLpujRRtqLNfMTSt6fYp5wQZVtP)
4. Surfaces the resulting transaction signature and account address as Solscan links

No off-chain database. The on-chain program is the source of truth; the website is just a UI on top of getAccountInfo and getProgramAccounts.

Quick start

For the static site, no build step required. Open index.html directly:

open index.html

For local development with a live server (recommended once interactive features land):

npx serve .
# or any other static server: python -m http.server, etc.

Configuration

Interactive flows target Solana devnet:

• RPC endpoint: https://api.devnet.solana.com
• Program: APRu6WGxe1NC4X2FrcLpujRRtqLNfMTSt6fYp5wQZVtP

Users need a Phantom wallet with devnet SOL. Devnet airdrop: https://faucet.solana.com

Related repositories

• april-gate/coldchain-programs — Solana on-chain programs
• april-gate/coldchain-core — ZK consensus proof engine

License

Apache 2.0

---

Built for the Solana Frontier Hackathon — Colosseum, May 2026.