1. **Core Components** 
```
lib/src/core/
├── inputs/          # Base input components
├── feedback/        # Loading, errors, notifications
├── layout/         # Layout primitives
├── navigation/     # Navigation components
├── theme/          # Theme system and defaults
└── typography/     # Text styles and components
```

2. **Domain-Specific Components**
```
lib/src/defi/
├── asset/          # Asset-related components (prices, balances)
├── swap/           # Swap/trading related components
├── transaction/    # Transaction components (history, status)
├── wallet/         # Wallet components (addresses, balances)
└── withdraw/       # Withdrawal flow components
```

3. **Composite Components**
```
lib/src/composite/
├── cards/          # Reusable card layouts
├── dialogs/        # Modal dialogs
├── forms/          # Form templates
└── lists/          # List templates
```

4. **Utils**
```
lib/src/utils/
├── formatters/     # Number/text formatting
├── validators/     # Input validation
└── hooks/          # Custom React-style hooks
```

5. **Constants**
```
lib/src/constants/
├── assets/         # Image/icon assets
├── colors/         # Color constants
├── spacing/        # Spacing constants
└── typography/     # Typography constants
```

The structure is inspired by mature UI libraries like Material UI and Chakra UI while being specifically tailored for DeFi applications.

Each component should follow these principles:

1. Fully documented API
2. Consistent prop naming
3. Theme-aware styling
4. Accessibility support
5. Responsive/adaptive design
6. Error handling
7. Loading states
8. Unit tests
9. Localization support
10. Widgetbook documentation