WanzaBlock/zambia-product-auth

# WanzaBlock – Blockchain Product Authentication System WanzaBlock is a blockchain-based product authentication platform designed to help combat counterfeit medicines and agricultural inputs. The system allows manufacturers to register products on-chain and enables consumers to verify authenticity by scanning a QR code. Each verification is recorded on-chain, providing transparent and tamper-resistant proof. Built and tested on Base Sepolia testnet. ## Screenshots ### Dashboard ### Blockchain Proof & Verification ### Manufacturer Dashboard ## Live Demo wanzablock.vercel.app ## Test Credentials > **Note:** These credentials are for demo and testing purposes only. ### Manufacturer Portal Login | Field | Value | |----------|---------------------| | Email | demo@wanzablock.com | | Password | demo2026 | ### Sample Batch Codes | Item ID | Expected Result | |----------------------|-----------------| | `WB-MMMQH0A6-00001` | ✦ Genuine | | `WB-MMMQEGDQ-00001` | ✦ Genuine | | `WB-MMMNKXJD-00001` | ✦ Genuine | > ⚠️ **Security Notice:** Change the demo account password before going to production. ## Architecture \`\`\` Frontend (Vanilla HTML / CSS / JavaScript) ↓ Backend API (Node.js / Express / Ethers.js v6) ↓ Smart Contract (Solidity 0.8.20 / Foundry) ↓ Blockchain (Base Sepolia) ↓ Off-chain Database (Supabase / PostgreSQL) \`\`\` ## Project Components | Layer | Folder | Description | |-------|--------|-------------| | Smart Contract | contracts/ | Solidity + Foundry — deployed on Base Sepolia | | Backend API | backend/ | Node.js/Express — product registration & verification | | Frontend | frontend/ | Vanilla HTML/CSS/JS — QR scan interface & manufacturer dashboard | ## Features - Manufacturer dashboard for registering product batches - QR-based product authentication - Consumer scan interface for verifying products - On-chain scan count tracking with off-chain GPS logging via Supaba …