May 10
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🚀 CourierChain — Decentralized Peer-to-Peer Courier Marketplace on Solana Submitted to Solana Hackathon 2026 · Çanakkale Hub · Solana Mobile Track 🌐 Live Demo: https://courierchain.vercel.app 💻 GitHub: https://github.com/sametergucc/courierchain ⚡ Network: Solana Devnet ────────────────────────────────────────── 🎯 WHAT IS COURIERCHAIN? CourierChain replaces centralized courier services (UPS, FedEx, local dispatchers) with an on-chain peer-to-peer marketplace where: ✅ Senders book verified couriers in seconds via Phantom wallet ✅ SOL is locked in escrow at booking — courier gets paid the moment of delivery ✅ Pickup & delivery are confirmed with QR codes scanned on the courier's phone ✅ Both sides see real-time navigation on a live map ✅ Senders can cancel & get an automatic refund before pickup ✅ Every delivery becomes a verifiable on-chain record — couriers build a portable reputation ────────────────────────────────────────── ⏱️ TIMESTAMPS 00:00 — Intro: The problem with centralized courier services 00:30 — How CourierChain works 01:00 — Sender flow: pick A & B, choose courier, escrow SOL 02:00 — QR-verified pickup & delivery handoff 02:45 — Live courier navigation (sender + courier views) 03:30 — Cancel & automatic refund 04:00 — Mobile Wallet Adapter integration (Solana Mobile) 04:45 — Why Solana? Sub-second settlement, sub-cent fees 05:15 — Tech stack & architecture 06:00 — Closing & roadmap ────────────────────────────────────────── 🛠️ TECH STACK • Solana (Devnet) — native SOL transfers for escrow • @solana/wallet-adapter-react + Phantom (Mobile Wallet Adapter) • Next.js 16 (App Router) + React 19 + TypeScript • Upstash Redis — persistent off-chain data • Leaflet.js — interactive maps with live navigation • html5-qrcode — camera-based QR scanning • qrcode.react — pickup/delivery QR generation • Vercel — hosting ────────────────────────────────────────── 📱 SOLANA MOBILE INTEGRATION CourierChain uses the Mobile Wallet Adapter (MWA) protocol via @solana/wallet-adapter-phantom. Couriers and senders connect Phantom mobile in one tap, sign multiple delivery transactions across a shift without re-authorizing, and never leave the app context. GPS, camera (QR scanner), and wallet all live in one mobile session — purpose-built for couriers working with one hand on a bike. ────────────────────────────────────────── 💡 WHY THIS MATTERS Traditional courier platforms charge 30%+ fees, withhold payments for weeks, and offer no cryptographic proof of delivery. CourierChain settles every delivery in under a second with sub-cent transaction fees — making micro-deliveries (a forgotten key, a coffee, urgent documents) economically viable for the first time. No central dispatcher. No withheld payments. No disputes without evidence. ────────────────────────────────────────── 🏷️ HASHTAGS #Solana #SolanaHackathon #SolanaMobile #DePIN #Web3 #Blockchain #Phantom #Crypto #Logistics #SmartContracts #DApp #Devnet #NextJS #React #TypeScript #PeerToPeer #CourierService #BlockchainLogistics ────────────────────────────────────────── 📩 Built by @sametergucc · Çanakkale, Türkiye 🇹🇷