# Errors and Issues Summary

## 🔴 Critical Errors (Must Fix)

### 1. Frontend TypeScript Error - defineChain
**File**: `frontend/lib/web3/config.ts:2`
**Error**: `'wagmi/chains' has no exported member named 'defineChain'`
**Status**: ⚠️ Type checking fails
**Solution**: In wagmi v2, use `viem`'s `defineChain` instead:
```typescript
import { defineChain } from "viem";
```

### 2. Backend TypeScript Compilation Errors
**File**: `backend/tsconfig.json`
**Errors**: 
- Missing ES2021 lib (for `replaceAll` method)
- Missing DOM lib (for `window` types in dependencies)
**Status**: ✅ FIXED - Updated tsconfig.json lib to ["ES2021", "DOM"]

## ⚠️ Warnings (Should Fix)

### Unused Imports/Variables (14 warnings)
- Multiple unused imports across frontend files
- Unused variables in error handlers and components
- Fix: Remove unused imports, use proper types

### Type Safety Issues
- Using `any` type in 4 locations instead of proper types
- Fix: Use `unknown` or `Error` for error handlers, define proper interfaces

### React Hooks
- `useEffect` dependency issue in RecentActivity component
- Fix: Wrap `transactions` array in `useMemo()`

## 📝 Implementation TODOs (9 items)
- Backend indexer needs completion
- Frontend components need backend API integration
- These are expected for MVP phase

## Summary
- **Critical Errors**: 1 remaining (defineChain import)
- **Fixed**: 1 (backend tsconfig)
- **Warnings**: 14 (code quality improvements)
- **TODOs**: 9 (planned features)