Blockchain for Food Traceability and Safety

Overview

This project implements a blockchain-based solution to enhance food traceability and safety. It validates temperature conditions for food transportation through smart contracts, ensuring food safety and automating payments or penalties based on compliance.

Features

• Smart contract validation of temperature data.
• Automated payment execution or penalties based on contract conditions.
• Transparency and immutability via blockchain.

Tools and Technologies

• Frontend: ReactJS
• Smart Contracts: Solidity
• Blockchain Framework: Hardhat

Workflow

1. Seller deploys a smart contract with initial deposit and temperature range.
2. Buyer provides details and deposits agreed amount.
3. Buyer imports temperature readings for validation.
4. Smart contract:
   • Transfers the amount to the seller if temperature conditions are met.
   • Applies penalties and refunds if conditions fail.

Benefits

• Enhanced Traceability: Real-time validation of food conditions.
• Efficiency: Automated and dispute-free transactions.
• Trust: Transparent and tamper-proof validations.

Getting Started

1. Clone the repository, under both directory hardhat and web-app, run below command to install node-modules.

   npm install

2. Set up the Hardhat environment for blockchain development. Use below commands under hardhat directory to run the local hardhat server

   npx hardhat node

3. Under same hardhat directory, in different command window compile and deploy the samrt contract

   npx hardhat compile

   npx hardhat ignition deploy ./ignition/modules/FoodSafety.js --network localhost

   Contract address will be desplayed, use this in Step 6.
4. Copy the ABI code from "D:\Projects\Repos\react-dapp\hardhat\artifacts\contracts\FoodSafety.sol\FoodSafety.json" to "D:\Projects\Repos\react-dapp\web-app\src\ethereum\foodSafetyAbi.js"
5. Use the React frontend to interact with the smart contracts. Go inside root directory web-app and run react app.

   npm run start

6. Make sure your browser has Metamask installed. Connect metamask to local hardhat network and open react frontend.

   http://localhost:3000

Future Enhancements

• Integration with IoT sensors for real-time temperature updates.
• Expanding to other food safety conditions like humidity or contamination detection.

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