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Protocol Overview

What is NoWaste Protocol?

NoWaste Protocol is a blockchain-based ecosystem that transforms food waste management through decentralization, transparency, and economic incentives. Built on VeryChain, the protocol connects restaurants, NGOs, and couriers in a trustless network where surplus food is efficiently redistributed to those in need while rewarding all participants.

How It Works

The protocol operates through a stake-to-earn mechanism with three key participants:

1. Restaurants create donation listings by staking 1,000 NOWASTE tokens, describing surplus food (type, quantity, location, expiry)
2. NGOs browse available donations and claim them by staking 500 NOWASTE tokens, committing to accept delivery
3. Couriers accept delivery jobs by staking 750 NOWASTE tokens, handling logistics between restaurants and NGOs

When a deal completes successfully:

• All participants receive their stakes back + bonus rewards
• Restaurant earns 100 NOWASTE tokens + Impact NFT certificate
• NGO earns 50 NOWASTE tokens
• Courier earns 75+ NOWASTE tokens (varies by distance/reputation)
• Everyone's reputation score increases, unlocking higher rewards

If any party fails to fulfill their commitment, their stake is slashed and redistributed to honest participants.

Protocol Integration Architecture

┌─────────────────────────────────────────────────────────────┐
│                        Frontend DApp                         │
│                    (React + Ethers.js)                       │
└────────────────────────┬────────────────────────────────────┘
                         │
                         ▼
┌─────────────────────────────────────────────────────────────┐
│                      VeryChain Network                      │
│                                         
└────────────────────────┬────────────────────────────────────┘
                         │
        ┌────────────────┼────────────────┐
        │                │                │
        ▼                ▼                ▼
┌──────────────┐  ┌──────────────┐  ┌──────────────┐
│ NoWasteToken │  │  Donation    │  │  Reputation  │
│   (ERC-20)   │  │   Manager    │  │    System    │
└──────┬───────┘  └──────┬───────┘  └──────┬───────┘
       │                 │                  │
       └────────┬────────┴────────┬─────────┘
                │                 │
        ┌───────▼────────┐  ┌────▼──────────┐
        │   ImpactNFT    │  │  Carbon       │
        │   (ERC-721)    │  │  Registry     │
        └────────────────┘  └───────────────┘

Key Benefits

Trust Minimization: Smart contracts enforce rules automatically - no central authority needed

Economic Incentives: All participants earn tokens and reputation for honest behavior

Environmental Impact: Each donation prevents CO₂ emissions, tracked permanently on-chain

Proof of Impact: NFT certificates serve as verifiable proof of social/environmental contribution

Transparency: All transactions, donations, and impacts are publicly auditable

Community Governance: Token holders vote on protocol upgrades, fee structures, and partnerships

Features Implemented

Core Infrastructure

• Web3 Integration: Full MetaMask wallet connection with multi-chain support
• Smart Contract Interaction: Integrated with all 6 core contracts
• React Context API: Centralized Web3 state management
• Toast Notifications: User-friendly transaction feedback

Smart Contract Integration

Contracts Used

1. NoWasteToken (NoWasteToken.sol)

   • Token balance queries
   • Staking/unstaking
   • Approval for spending

2. DonationManager (DonationManager.sol)

   • Create donations
   • Claim donations
   • Confirm pickup/delivery
   • Fetch available/user deals

3. ReputationSystem (ReputationSystem.sol)

   • Get user reputation score
   • Calculate reward multipliers
   • Fetch tier information

4. ImpactNFT (ImpactNFT.sol)

   • Mint Impact NFTs
   • Fetch user's NFT collection
   • Get NFT metadata

5. CarbonCreditRegistry (CarbonCreditRegistry.sol)

   • Track carbon credits
   • Calculate CO₂ prevented

6. DAOGovernance (DAOGovernance.sol)

   • Create proposals
   • Vote on governance decisions

User Flow Diagram

flowchart TD
    Start([User Arrives]) --> Connect[Connect Wallet]
    Connect --> Role{Select Role}
    
    Role -->|Restaurant| RestaurantFlow
    Role -->|NGO| NGOFlow
    Role -->|Courier| CourierFlow
    
    RestaurantFlow[Create Donation] --> Stake1[Stake 1000 NOWASTE]
    Stake1 --> Submit[Submit Listing]
    Submit --> Wait1[Wait for Claim]
    Wait1 --> PickupConfirm[Confirm Pickup]
    PickupConfirm --> Reward1[Receive 100 tokens + NFT]
    
    NGOFlow[Browse Donations] --> Claim[Claim Donation]
    Claim --> Stake2[Stake 500 NOWASTE]
    Stake2 --> Wait2[Wait for Delivery]
    Wait2 --> DeliveryConfirm[Confirm Delivery]
    DeliveryConfirm --> Reward2[Receive 50 tokens]
    
    CourierFlow[Accept Job] --> Stake3[Stake 750 NOWASTE]
    Stake3 --> Pickup[Pickup from Restaurant]
    Pickup --> Deliver[Deliver to NGO]
    Deliver --> Reward3[Receive 75+ tokens]
    
    Reward1 --> Dashboard[View Dashboard]
    Reward2 --> Dashboard
    Reward3 --> Dashboard

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Smart Contract Interaction Flow

sequenceDiagram
    participant R as Restaurant
    participant F as Frontend
    participant W as Wallet
    participant DM as DonationManager
    participant TK as NoWasteToken
    participant RS as ReputationSystem
    participant NFT as ImpactNFT
    
    R->>F: Create Donation
    F->>W: Request Connection
    W-->>F: Connected
    
    F->>TK: Check Balance
    TK-->>F: Balance: 5000 NOWASTE
    
    F->>W: Request Approval (1000 tokens)
    W->>R: Sign Transaction?
    R->>W: Approve
    W->>TK: approve(DonationManager, 1000)
    TK-->>F: Approval Successful
    
    F->>W: Request Create Donation
    W->>R: Sign Transaction?
    R->>W: Approve
    W->>DM: createDonation(details)
    
    DM->>TK: transferFrom(restaurant, DM, 1000)
    DM->>RS: updateReputation(restaurant, +10)
    DM-->>F: Donation Created (ID: 1)
    
    Note over F: NGO claims donation...
    Note over F: Courier delivers...
    
    DM->>DM: completeDonation(1)
    DM->>NFT: mintImpactCertificate(restaurant)
    NFT-->>DM: NFT Minted (Token ID: 1)
    DM->>TK: transfer(restaurant, 100)
    DM->>RS: updateReputation(restaurant, +50)
    
    DM-->>F: Transaction Complete
    F->>R: Display Success + NFT

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