Blockchain Enabled System for Sustainable Economy

BESSE (Blockchain Enabled System for Sustainable Economy) is a comprehensive blockchain-based platform designed to revolutionize the recycling and waste management industry. By embedding blockchain technology into the advanced recycling value chain, BESSE provides a fully traceable and accurately labeled record of recycled materials, from waste sourcing up to use in new production streams.

Overview

BESSE enables all stakeholders in the recycling industry to have complete visibility of the provenance and quality of materials entering and exiting their facilities. The platform combines smart contract-based auctions, asset tracking, environmental impact analysis, and role-based access control to create a transparent, efficient, and sustainable circular economy ecosystem.

Key Features

🏛️ Smart Contract Auctions

BESSE supports three types of blockchain-based auction mechanisms:

English Auctions: Traditional ascending price auctions where bidders compete by placing increasingly higher bids
Dutch Auctions: Descending price auctions where the price decreases over time until a bidder accepts
Fixed Price Sales: Direct sales at a predetermined price for immediate transactions

All auctions are executed on-chain using Solidity smart contracts, ensuring transparency, immutability, and trustless transactions. Settlement is protected by an on-chain escrow: the winning payment is held by the auction contract and released to the seller when the buyer confirms delivery — with a 7-day fallback so funds can never be locked indefinitely.

📦 Asset Management & Tracking

NFT-Based Assets: Each material batch is represented as an ERC-721 NFT, providing unique ownership and provenance tracking
QR Code Tracking: Physical assets are tracked through QR codes that can be scanned at various stages of the supply chain
Supply Chain Visibility: Complete tracking from creation through processing, transportation, and final delivery
Role-Based Tracking Events: Different stakeholders can record specific events (picked up, in transit, processed, delivered, etc.) based on their role

🌱 WARM Integration

BESSE integrates with the US EPA's Waste Reduction Model (WARM) version 16 to calculate:

Greenhouse Gas Emissions: MTCO2E (Metric Tons of Carbon Dioxide Equivalent) reductions
Energy Requirements: Energy savings from recycling vs. landfilling
Economic Impact: Labor hours, wages, and tax generation from recycling activities

This integration allows users to see the environmental and economic benefits of their recycling activities in real-time.

👥 Role-Based Access Control (RBAC)

BESSE implements a sophisticated role-based system with eight distinct stakeholder roles:

Municipality: Local government entities managing waste collection
Hauler: Waste collection and transportation companies
MRF: Material Recycling Facilities that process materials
Transportation Company: Logistics providers for material shipping
Broker: Intermediaries facilitating transactions
Remanufacturer/Mill: Facilities processing materials into new products
Landfill: Waste disposal site operators
Admin: System administrators with full platform access

Each role has specific permissions for creating auctions, bidding, asset creation, and tracking events.

🔐 Flexible Authentication

Social Sign-In (Privy): Google or email login with an embedded wallet created automatically — no crypto knowledge required
Wallet Sign-In (MetaMask): One-click login using wallet signature verification for crypto-native users
One Identity: Both paths converge on the same wallet-address identity via Firebase custom tokens
No Passwords Required: Cryptographic wallet ownership (or a verified social identity) replaces traditional passwords

📊 Dashboard & Analytics

Real-time auction monitoring
Personal transaction history
Asset portfolio management
Environmental impact metrics (WARM calculations)
Economic impact visualization

📱 Mobile App (iOS & Android)

Cross-platform React Native app sharing the platform's backend — see Mobile App
Browse and bid on auctions, create listings, and monitor impact from a phone
Live shipment tracking with maps and proof-of-delivery photo capture
Landfill directory and disposal quote requests for non-recyclable material
Built for field conditions: offline-tolerant, with resumable long-running operations

Technology Stack

Web Frontend

React 18: Modern UI library for building interactive interfaces
Redux Toolkit: State management for complex application state
Tailwind CSS: Utility-first CSS framework for responsive design
Framer Motion: Animation library for smooth user experiences
Ethers.js: Ethereum JavaScript library for blockchain interactions
Chart.js: Data visualization for analytics and metrics

Mobile

React Native (Expo): Cross-platform iOS/Android app written in TypeScript
Expo Router: File-based navigation with deep linking
Redux Toolkit: State-management patterns shared with the web app, with on-device persistence

Backend

Firebase: Google's backend-as-a-service platform
- Cloud Firestore: NoSQL database for storing auction, asset, and user data
- Cloud Functions: Serverless functions for business logic
- Firebase Authentication: Custom authentication with MetaMask
Node.js 20: Runtime environment for backend services

Blockchain

Hardhat: Development environment for Ethereum smart contracts
Solidity: Smart contract programming language
ERC-721: NFT standard for representing unique assets
Sepolia Testnet: Current deployment target for the pilot
Local Hardhat Network: Fast local chain for development (Polygon-compatible by design)

Integration Services

WARM Model: EPA's Waste Reduction Model for environmental calculations
SheetJS: Excel spreadsheet processing for WARM integration
HyperFormula: Formula execution engine for WARM calculations

How It Works

Registration: Users sign in with Google/email (an embedded wallet is created automatically) or connect MetaMask, and register with a role appropriate to their organization
Asset Creation: Stakeholders create digital assets (NFTs) representing physical material batches
Auction Creation: Authorized roles (Municipality, MRF, Broker) create auctions for their assets
Bidding: Eligible bidders participate in auctions based on material type and role permissions
Transaction Execution: Smart contracts automatically handle bid acceptance, NFT transfer, and escrowed payment — released to the seller on delivery confirmation
Tracking: QR codes enable physical tracking throughout the supply chain
Impact Analysis: WARM integration calculates environmental and economic benefits
Delivery Confirmation: Multi-party verification ensures material delivery and quality

Use Cases

Municipal Waste Management: Cities can auction collected recyclables to processing facilities
MRF Operations: Material recycling facilities can sell processed bales to remanufacturers
Broker Services: Intermediaries can facilitate transactions between various stakeholders
Supply Chain Transparency: Complete traceability from waste source to final product
Environmental Reporting: Automated calculation of GHG reductions and energy savings
Circular Economy: Enabling efficient material flow in closed-loop systems

Benefits

✅ Transparency: All transactions are recorded on-chain and publicly verifiable
✅ Trust: Smart contracts eliminate the need for intermediaries
✅ Traceability: Complete supply chain visibility from source to destination
✅ Sustainability: Real-time environmental impact calculations
✅ Efficiency: Automated auction and payment processes
✅ Security: Cryptographic authentication and immutable records
✅ Accessibility: Web-based platform accessible from any device

Getting Started

To get started with BESSE, please refer to the Get Started Guide which includes:

MetaMask wallet setup
Account registration
Creating your first auction
Bidding on auctions

For detailed information about specific features, please explore the documentation sections on the left sidebar.

Get Started