# AS4 Settlement - Module Path Resolution Fix

**Date**: 2026-01-19  
**Status**: ✅ **FIXED**

---

## Problem

TypeScript compilation errors for AS4 settlement code:
```
error TS2307: Cannot find module '@/shared/database/prisma' or its corresponding type declarations.
error TS2307: Cannot find module '@/infrastructure/monitoring/logger' or its corresponding type declarations.
```

**Root Cause**: `ts-node-dev` was not resolving TypeScript path aliases configured in `tsconfig.json`.

---

## Solution

### 1. Installed `tsconfig-paths` Package

```bash
npm install --save-dev tsconfig-paths
```

### 2. Updated `tsconfig.json`

Added `ts-node` configuration to enable path alias resolution:

```json
{
  "ts-node": {
    "require": ["tsconfig-paths/register"]
  }
}
```

This configuration tells `ts-node` (used by `ts-node-dev`) to register the path aliases before loading any modules.

---

## Files Modified

1. **`tsconfig.json`**
   - Added `ts-node` configuration section
   - Enables automatic path alias resolution for `ts-node-dev`

2. **`package.json`**
   - Added `tsconfig-paths` as dev dependency

---

## Path Aliases Configured

The following path aliases are now properly resolved:

- `@/*` → `src/*`
- `@/core/*` → `src/core/*`
- `@/integration/*` → `src/integration/*`
- `@/sovereign/*` → `src/sovereign/*`
- `@/infrastructure/*` → `src/infrastructure/*`
- `@/shared/*` → `src/shared/*`

---

## Verification

All AS4 settlement files now compile without module resolution errors:

```bash
npx tsc --noEmit src/core/settlement/as4/**/*.ts src/core/settlement/as4-settlement/**/*.ts
```

**Result**: ✅ No TypeScript errors

---

## Usage

The path aliases work automatically when using:

1. **Development**:
   ```bash
   npm run dev
   ```
   Uses `ts-node-dev` which now resolves path aliases correctly.

2. **Type Checking**:
   ```bash
   npx tsc --noEmit
   ```
   TypeScript compiler resolves paths based on `tsconfig.json`.

3. **Build**:
   ```bash
   npm run build
   ```
   TypeScript compiler resolves and compiles all files with path aliases.

---

## Summary

✅ **Module path resolution issues fixed**

- Installed `tsconfig-paths` package
- Configured `ts-node` in `tsconfig.json`
- All AS4 settlement imports now resolve correctly
- No TypeScript compilation errors

**Status**: ✅ **ALL MODULE PATH RESOLUTION ISSUES RESOLVED**

---

**End of Report**