Digital Product Passports (DPP)

SmaCE'23: Digital Product Passports - Use Cases Framework and Technical Architecture Using DLT and Smart Contracts

📚 Publication

This project is based on research published in IEEE SmaCE'23. Read the full paper here: Digital Product Passports: Use Cases Framework and Technical Architecture Using DLT and Smart Contracts

🎯 Project Overview

A proof-of-concept implementation demonstrating Digital Product Passports using blockchain technology and smart contracts. This project enables secure, transparent tracking of products throughout their lifecycle using blockchain.

🏗 Architecture

• Smart Contract Layer: Solidity-based contract managing DPP data and access control
• Gateway Layer: Python-based REST API for interacting with the blockchain
• Authentication: Built-in blockchain-based access control system

🔑 Key Features

• Product Passport Creation: Generate unique digital identifiers for products
• History Tracking: Immutable record of all product modifications
• Access Control: Granular control over who can modify product data
• Product Merging: Support for combining multiple DPPs
• Version Control: Complete history of all product changes
• RESTful API: Easy integration with external systems

💻 Technical Stack

• Smart Contract: Solidity ^0.8.2
• Backend: Python with Flask
• Blockchain: IOTA (Web3.py)
• API Framework: Flask with CORS support

🚀 Getting Started

Prerequisites

• Python 3.x
• EVM based IOTA node (local or remote)
• Web3.py
• Flask

Installation

# Install required Python packages
pip install web3 flask flask-cors

# Configure IOTA connection in main_functions.py
node_url = "YOUR_IOTA_NODE_URL"
PRIVATE_KEY = "YOUR_PRIVATE_KEY"
PUBLIC_KEY = "YOUR_PUBLIC_KEY"

Smart Contract Deployment

1. Deploy contract.sol to your IOTA network
2. Update contract address in main_functions.py
3. Ensure abi.json matches your deployed contract

📡 API Endpoints

Create New DPP

POST /create_dpp
{
    "companyName": "string",
    "productType": "string",
    "productDetail": "string",
    "manucaftureDate": number
}

Update Existing DPP

POST /update_dpp
{
    "dpp_identifier": "string",
    "companyName": "string",
    "productType": "string",
    "productDetail": "string",
    "manucaftureDate": number
}

Get DPP History

POST /get_dpp_history
{
    "id": "string"
}

🔐 Smart Contract Features

• Authentication System: Built-in access control
• Data Structure: Comprehensive DPP_DATA struct
• History Management: Complete modification tracking
• Merging Capability: Support for combining DPPs

🤝 Contributing

This project is part of SmaCE'23 research on Digital Product Passports. Contributions aligned with the research goals are welcome.

📄 License

GPL-3.0