Blockchain-Based Supply Chain Traceability System

Defining actors
Access modifiers
Structure of the product

🌟 Inspiration

Supply chains today suffer from fraud, fake products, and poor transparency. We wanted to build a system where every product’s journey is secure, traceable, and impossible to manipulate.

🛠️ What it does

Our system registers each product on the blockchain, tracks every movement across the supply chain, stores metadata on IPFS, and lets anyone verify authenticity with a single product ID or QR code.

🔧 How we built it

We used Solidity smart contracts on Ethereum/Ganache, IPFS for decentralized storage, and Remix + MetaMask for deployment and testing. Each product’s history, transfers, and roles are immutably recorded on-chain.

🚧 Challenges we ran into

Balancing on-chain vs off-chain storage, debugging immutable smart contracts, managing role-based permissions, and ensuring IPFS availability were the toughest parts.

🏆 Accomplishments we’re proud of

We built a fully working blockchain traceability prototype: product creation, secure transfers, immutable history, IPFS integration, and end-to-end verification—all successfully tested.

📚 What we learned

Smart contracts, IPFS workflows, decentralized architectures, supply-chain logistics, and how to design transparent, tamper-proof systems.