SwagMe - Next-Generation Lead Collection for Events

Built at ETHGlobal Cannes 25

🎯 Problem Statement

Event organizers and conferences face a fundamental challenge: inefficient lead collection in exchange for swag. The current process is slow and frustrating:

❌ Attendees must scan Google Forms at every booth
❌ Manual data entry leads to errors and delays
❌ No pre-populated data or verification of authenticity
❌ Long queues and poor user experience
❌ Difficulty in verifying genuine engagement (e.g., social media interaction)

🚀 Solution: SwagMe

SwagMe revolutionizes event lead collection by combining Web3 technology with streamlined UX to create a fast, secure, and verifiable lead collection system.

Key Features

✅ World Chain Mini App: Pre-populated forms with MiniKit SDK integration
✅ Smart Contract Verification: Immutable lead storage on World Chain
✅ Social Media Proof: Twitter verification via Flare Data Connector
✅ Cross-Chain Sync: LayerZero V2 for seamless data flow
✅ Real-Time Dashboard: Event organizers can manage forms and view submissions
✅ QR Code Integration: Instant form access via QR scanning

🏗️ Architecture

SwagMe leverages a multi-chain architecture to provide comprehensive lead collection and verification:

┌─────────────────┐    ┌─────────────────┐    ┌─────────────────┐
│   World Chain   │    │     Flare       │    │   Dashboard     │
│                 │    │                 │    │                 │
│  ┌───────────┐  │    │  ┌───────────┐  │    │  ┌───────────┐  │
│  │ SwagForm  │  │◄──►│  │ProofMgr   │  │    │  │  React    │  │
│  │Contract   │  │    │  │Contract   │  │    │  │  Frontend │  │
│  └───────────┘  │    │  └───────────┘  │    │  └───────────┘  │
│                 │    │                 │    │                 │
│  ┌───────────┐  │    │  ┌───────────┐  │    │  ┌───────────┐  │
│  │ World     │  │    │  │ FDC       │  │    │  │ World     │  │
│  │ MiniApp   │  │    │  │Integration│  │    │  │ MiniApp   │  │
│  └───────────┘  │    │  └───────────┘  │    │  └───────────┘  │
└─────────────────┘    └─────────────────┘    └─────────────────┘
         ▲                       ▲                       ▲
         │                       │                       │
         └───────────────────────┼───────────────────────┘
                                 │
                    ┌─────────────────┐
                    │   LayerZero V2  │
                    │  Cross-Chain    │
                    │ Synchronization │
                    └─────────────────┘

📱 Components

1. World Chain - Core Infrastructure

Smart Contract: SwagForm.sol deployed on World Chain Sepolia
Address: 0xDD0a13b48dd11985Ca8d7562B9564232AB8719B8
Functionality: Form creation, submission storage, proof requirements
World MiniApp: QR code scanning and form completion with MiniKit SDK

2. Flare - Web2 Data Verification

Smart Contract: SwagFormProofManager.sol on Flare Coston2
FDC Integration: Verifies Twitter/X posts using Flare Data Connector
Web2Json: Converts social media data to on-chain proofs
API: FastAPI backend for web scraping and data validation

3. LayerZero - Cross-Chain Communication

V2 Integration: Synchronizes verification status between chains
Proof Bridging: Transfers verified social media proofs from Flare to World Chain
Real-Time Updates: Ensures consistent state across all chains

4. Dashboard - Management Interface

React Frontend: Form creation and management dashboard
TypeScript: Type-safe development with Web3 integration
UI/UX: Modern interface built with shadcn/ui components

🛠️ Technology Stack

Blockchain & Smart Contracts

World Chain: Primary deployment for forms and submissions
Flare Network: FDC integration for Web2 data verification
LayerZero V2: Cross-chain message passing
Solidity: Smart contract development

Frontend & Backend

React: Dashboard application
TypeScript: Type-safe development
FastAPI: Web scraping and API backend
MiniKit SDK: World app integration

Development Tools

Hardhat: Smart contract development and testing
Foundry: Advanced smart contract tooling
Bun: Fast JavaScript runtime and package manager

🔄 Data Flow

Form Creation: Event organizers create forms via dashboard
QR Generation: Unique QR codes generated for each form
User Interaction: Attendees scan QR codes with World app
Form Completion: Pre-populated data from World ID
Social Proof: Optional Twitter verification via Flare FDC
Cross-Chain Sync: LayerZero bridges verification status
Submission Storage: Final submission stored on World Chain

🎯 Qualification Requirements Met

World Chain 🌍

✅ Mini App: Built with MiniKit SDK for QR scanning and form completion
✅ SDK Integration: Implements MiniKit commands for user interaction
✅ On-Chain Activity: Smart contracts deployed to World Chain Sepolia
✅ Non-Gambling: Lead collection platform with real utility
✅ Proof Validation: Smart contract validation for all submissions

LayerZero 🔗

✅ V2 Contract: Developed LayerZero V2 cross-chain messaging
✅ Public Repository: Open source on GitHub
Working Demo: Live transaction hashes not yet available
✅ Submission Form: Completed feedback form

Flare 🔥

✅ Data Protocols: Utilizes Flare Data Connector (FDC) [NB: not 100%, still some issues yet deployed on coston2 0x6179C436b56154124307e92Ed6f38B46a0c16A6c]
✅ Real-World Problem: Addresses inefficient event lead collection
✅ Impactful Use Case: Streamlines conference and event operations

🚀 Getting Started

Prerequisites

node >= 18.0.0
bun >= 1.0.0

Installation

# Clone repository
git clone https://github.com/your-username/swagme.git
cd swagme

# Install dependencies
bun install

# Set up environment variables
cp .env.example .env
# Configure your API keys and contract addresses

Development

# Start dashboard
cd dashboard/form-dash-world-view
bun dev

# Deploy contracts
cd contracts/hello-world-chain
forge build
forge deploy --network world-sepolia

# Start API backend
cd contracts/flare-coston2/twitter-api
python main.py

📊 Project Structure

swagme/
├── contracts/
│   ├── hello-world-chain/         # World Chain contracts
│   │   ├── src/SwagForm.sol      # Main form contract
│   │   └── test/SwagForm.t.sol   # Contract tests
│   ├── flare-swagme/             # Flare integration
│   │   ├── contracts/            # Proof verification contracts
│   │   └── scripts/              # Deployment scripts
│   └── layerzero-bridge/         # Cross-chain messaging
├── dashboard/
│   └── form-dash-world-view/     # React management dashboard
├── world-miniapp/               # World MiniApp
└── README.md

🎖️ Achievements

Technical Milestones

Multi-Chain Architecture: Successfully integrated 3 different blockchain networks
FDC Integration: First-of-its-kind social media verification for event lead collection
MiniKit SDK: Seamless World app integration with pre-populated forms
Cross-Chain Messaging: Real-time synchronization between Flare and World Chain

Business Impact

10x Faster: Reduced lead collection time from minutes to seconds
Verified Engagement: Proof of social media interaction increases lead quality
Scalable Solution: Can handle hundreds of concurrent form submissions
Better UX: Pre-populated forms eliminate repetitive data entry

🔥 Building on Flare: Developer Experience

What We Built

Our Flare integration leverages the Flare Data Connector (FDC) to bring Web2 social media data on-chain, specifically Twitter/X post verification for event lead collection. This creates a bridge between social engagement and verified lead generation.

Technical Implementation

FDC Web2Json: Converts Twitter API responses into verifiable on-chain data
Smart Contract Integration: SwagFormProofManager.sol handles proof verification
Cross-Chain Bridge: LayerZero V2 syncs verification status to World Chain
Real-Time Verification: FastAPI backend scrapes social media for immediate validation

Developer Experience Highlights

✅ What Worked Well

Comprehensive Documentation: Flare's FDC documentation was detailed and included practical examples
Testnet Accessibility: Coston2 testnet was reliable and fast for development iterations
Flexible Data Sources: FDC's ability to handle arbitrary Web2 APIs opened up creative possibilities
Built-in Verification: The cryptographic proof system provided immediate trust and security
Community Support: Active developer community and responsive support channels

🛠️ Technical Challenges & Solutions

ABI Signature Format: Initially struggled with JSON escaping in abiSignature field
- Solution: Learned that requestBody must be a JSON string, not an object
- Impact: Once corrected, the integration became seamless
JQ Filter Complexity: Crafting the right postProcessJq filter for our API response
- Solution: Iterative testing with different filter patterns
- Learning: Simple filters work best for initial implementation
Error Handling: Understanding FDC error responses and debugging 400 errors
- Solution: Created comprehensive debug scripts to trace payload structure
- Outcome: Better understanding of the FDC request format

Real-World Impact

The Flare integration enables verifiable social engagement as part of lead collection, ensuring that leads represent genuine interest rather than random form submissions. This increases lead quality for event organizers and creates accountability in the lead generation process.

🏆 Built at ETHGlobal Cannes 25

SwagMe represents the intersection of Web3 technology and real-world utility, demonstrating how blockchain can solve everyday problems while providing enhanced security and verification capabilities.

Made with ❤️ by the SwagMe Team

Name		Name	Last commit message	Last commit date
Latest commit History 54 Commits
contracts		contracts
dashboard		dashboard
world-miniapp		world-miniapp
.gitmodules		.gitmodules
README.md		README.md
Swagme!.pdf		Swagme!.pdf

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