Nudge - Smart, Sentiment-Aware Crypto Investing

Nudge is a Worldcoin Mini App that makes crypto investing simple, automated, and adaptive to market conditions. Users select a pre-built portfolio and set up a recurring buy using their credit card. From there, Nudge automates portfolio management, shifting assets into USDC when market sentiment turns bearish, and redeploying when sentiment improves. While funds are in USDC, Nudge puts them to work in low-risk DeFi strategies to earn passive yield.

🏆 Built with Three Leading Sponsors

Worldcoin - Authentication & Wallet Infrastructure

• MiniKit Integration: Seamless wallet creation and management within World App
• World ID Verification: Secure, privacy-preserving identity verification
• Push Notifications: Real-time alerts for market sentiment changes and portfolio updates
• Smart Wallet Factory: Automated smart contract wallet deployment for users

Circle - Cross-Chain Infrastructure & Payments

• Developer-Controlled Wallets: Secure wallet management for automated trading operations
• USDC Integration: Stablecoin foundation for risk management and yield generation
• CCTP V2: Cross-chain transactions for an easier investment experience.

Privy - Authentication & User Management

• Sign-In with Ethereum (SIWE): Web3-native authentication flow
• Session Management: Secure user session handling with NextAuth integration
• User Profile Management: Seamless user experience with profile data handling

🧠 Sentiment-Aware Intelligence

Real-Time Market Sentiment Analysis

• Fear & Greed Index: Live sentiment tracking from CoinMarketCap API
• Trend Analysis: 7-day moving averages with percentage change calculations
• Sentiment Classification: Five-tier system (Extreme Fear → Extreme Greed)
• Visual Indicators: Emoji-based sentiment display with color-coded trends

Critical News Market Impact

• News Aggregation: Real-time financial news from multiple sources
• Impact Scoring: AI-powered analysis of news impact on markets
• Bloomberg-Style Ticker: Continuous scrolling news feed with impact scores
• Market Relevance Filtering: Intelligent filtering for market-moving events

Automated Risk Management

• Sentiment-Based Rebalancing: Automatic portfolio adjustments based on market conditions
• Emergency Sell Function: Rapid liquidation to USDC during extreme market stress
• Yield Generation: DeFi strategies for stable holdings during bear markets

🚀 Key Features

Smart Portfolio Management

• Pre-built Portfolios: Curated institutional-grade allocations (BTC 40%, WLD 30%, WETH 30%)
• Dollar-Cost Averaging: Automated monthly investments with configurable amounts
• Smart Contract Wallets: Secure, programmable wallets for automated trading
• Cross-Chain Operations: Seamless asset management across multiple blockchains

User Experience

• Zero Complexity: Designed for crypto newcomers with intuitive interface
• Real-Time Updates: Live portfolio tracking and sentiment monitoring
• Mobile-First: Optimized for World App mobile experience
• Gasless Transactions: No gas fees for users through Circle's paymaster

Technical Architecture

• Next.js Frontend: Modern React-based user interface
• Node.js Backend: Robust API for sentiment analysis and trading automation
• MongoDB Database: Transaction history and user data storage
• Web3 Integration: Direct blockchain interaction for trading operations

🛠️ Technical Stack

Frontend

• React 19 with TypeScript
• Next.js 15 with App Router
• Tailwind CSS for styling
• Worldcoin Mini Apps UI Kit

Backend

• Node.js with Express
• MongoDB for data persistence
• Web3.js for blockchain interaction
• Cron jobs for automated trading

Blockchain

• World Chain for primary operations
• Smart contracts for wallet management, and Foundry for contract deployment
• Uniswap V2 for token swaps, and Uniswap V3 for liquidity providing
• ERC-4337 Account Abstraction with Smart Wallets.

APIs & Services

• CoinMarketCap Fear & Greed Index
• News API for market impact analysis
• Circle CCTP for cross-chain transfers
• Worldcoin MiniKit for wallet operations

🎯 Use Cases

For New Crypto Investors

• Start with as little as $100/month
• No need to understand complex DeFi protocols
• Automated risk management protects capital
• Educational insights through sentiment analysis

For Experienced Traders

• Institutional-grade portfolio allocations
• Automated DCA with sentiment-based timing
• Cross-chain arbitrage opportunities
• Advanced yield farming strategies

For Portfolio Managers

• Bulk wallet management capabilities
• Real-time sentiment monitoring
• Automated rebalancing based on market conditions
• Comprehensive transaction tracking

🔒 Security & Compliance

• Non-Custodial: Users maintain full control of their assets
• Audited Smart Contracts: OpenZeppelin-based secure implementations
• Privacy-Preserving: World ID verification without personal data collection
• Regulatory Compliant: Built with compliance considerations for global markets

🌟 Why Nudge?

Nudge represents the future of crypto investing, where sophisticated market intelligence meets simple, automated execution. By leveraging the combined power of Worldcoin's identity infrastructure, Circle's cross-chain capabilities, and Privy's authentication system, we've created a platform that makes institutional-grade crypto investing accessible to everyone.

Whether you're a crypto newcomer looking to start your investment journey or an experienced trader seeking automated portfolio management, Nudge provides the tools, intelligence, and security you need to succeed in the digital asset markets.