SimpliFi Pay

SimpliFi Pay reimagines crypto payments by bridging the gap between traditional finance and Web3. Built as a World Chain Mini App, it offers:

• User-Owned KYC: Leveraging World ID for regulatory compliance while maintaining user privacy
• Social Login: Seamless onboarding through World ID and email verification
• Gasless Transactions: Zero gas fees thanks to World Chain's transaction sponsorship
• Privacy Features: Private transactions with optional disclosure
• Multi-chain Support: Native support for World Chain with cross-chain capabilities
• Instant Payments: QR code and direct wallet-to-wallet transfers
• Merchant Tools: Easy integration for businesses through SDK/API

Our goal is to make crypto payments as simple as traditional payment apps while preserving the benefits of decentralization and privacy.

SimpliFi Pay leverages several cutting-edge technologies to deliver a seamless payment experience:

Core Technologies

• Next.js 14: For the frontend application with server-side rendering
• World Chain Mini Apps SDK: For seamless integration with World Chain ecosystem
• World ID: For user verification and KYC
• tailwindcss & shadcn/ui: For responsive and mobile-first design
• Zustand: For state management
• TypeScript: For type safety and better developer experience

Key Integrations

1. World ID Integration

   • Implemented user-owned KYC using World ID
   • Social login through World ID's verification system
   • Privacy-preserving identity verification

2. World Chain Mini App Features

   • Used MiniKit.js for wallet interactions and payments
   • Implemented gasless transactions using World Chain's transaction sponsorship
   • Built responsive UI following Mini App design guidelines

3. Payment System

   • Integrated World Chain's native USDC for stable payments
   • Implemented QR code generation for peer-to-peer transfers
   • Built real-time payment status tracking

Technical Challenges & Solutions

1. Privacy Implementation

   • Used World Chain's privacy features for optional transaction privacy
   • Implemented selective disclosure for payment details

2. User Experience

   • Created a seamless onboarding flow with social login
   • Built mobile-optimized interfaces following World Chain Mini App guidelines
   • Implemented real-time balance updates and transaction monitoring

3. Developer Experience

   • Set up a monorepo structure for better code organization
   • Used TypeScript for enhanced type safety
   • Implemented automated testing for critical components