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Chat-ching: Crypto Access for AllThrough WhatsApp
Discover Chat-ching, a WhatsApp-based DeFi platform offering peer-to-peer payments, token trading, and yield generation with zero app installation or private key handling.
Chat-ching is a proof-of-concept that bridges the gap between familiar messaging platforms and the more complex blockchain technology. By integrating DeFi capabilities directly into the world's most popular messaging app this project demonstrates how crypto finance can become truly accessible to mainstream users.
How is it done?
Architecture
Chat-ching implements a modular architecture, comprised of three main components:
- WhatsApp Bot: Handles user interactions through natural language commands, manages user authentication, session management, and API orchestration.
- Frontend: Manages On/Off-Ramps, user registration and authorization of actions, in accordance to the user's preferences.****
- On-chain contracts: Contract that transfers tokens to external vaults
to passively generate yields and handle payments, deposits and withdrawals.
Smart Wallet Management
- Automatic wallet generation with coinbase's smart wallet for new users upon registration
- The Bot server never holds user’s private data
- Support for multiple risk profiles with corresponding vault strategies
Financial Operations
- Payments: Peer-to-peer payments to a contact through simple WhatsApp commands
- Token Trading: Buy/sell operations for tokens
- Vault Deposits: Yield-generating deposits with configurable APY rates
Security Framework
- Multi-factor Authentication: Whatsapp credentials, PIN-based access and user signed transaction with **configurable authorization profiles**
- Session Management: Centralized 5-minute timeout with PIN restoration
- Risk Profiling: User-configurable risk levels affecting vault allocation
Blockchain Infrastructure
- Fast transactions: Leveraging Coinbase's L2 for low-cost, fast transactions
- Coinbase's Smart wallet: Passphrase authentication, enabling the familiar biometric sign in
- Multi-network Support: Ready for Ethereum, Polygon, and other EVM chains. Easily extendable to non EVM chains
- Sponsored Gas: All authorizations signed by the user are sponsored by the app
- Contract Verification: Full smart contract audit trail and transparency