# Packages Directory

**Last Updated**: 2025-01-27  
**Purpose**: Shared libraries and packages overview

## Overview

This directory contains shared libraries and packages used across services and applications in The Order monorepo.

## Package Categories

### Core Packages

#### `shared/`
- **Purpose**: Common utilities, middleware, error handling
- **Used By**: All services
- **Key Features**: Logging, validation, authentication, rate limiting

#### `database/`
- **Purpose**: Database layer, migrations, queries
- **Used By**: All services
- **Key Features**: PostgreSQL client, migrations, query builders

#### `schemas/`
- **Purpose**: Zod/JSON schemas for validation
- **Used By**: All services and apps
- **Key Features**: Request/response validation, type safety

### Authentication & Security

#### `auth/`
- **Purpose**: Authentication and authorization
- **Used By**: All services
- **Key Features**: JWT, OIDC, DID authentication

#### `crypto/`
- **Purpose**: Cryptography, KMS integration
- **Used By**: Identity, Legal Documents services
- **Key Features**: Key management, signing, encryption

### Infrastructure

#### `storage/`
- **Purpose**: Storage abstraction (S3/GCS/Azure)
- **Used By**: Intake, Dataroom, Legal Documents services
- **Key Features**: WORM storage, object lifecycle

#### `monitoring/`
- **Purpose**: Observability and metrics
- **Used By**: All services
- **Key Features**: Prometheus metrics, OpenTelemetry

#### `cache/`
- **Purpose**: Caching utilities
- **Used By**: All services
- **Key Features**: Redis caching, cache strategies

### Specialized Packages

#### `verifier-sdk/`
- **Purpose**: Verifiable credential verification
- **Used By**: Identity service
- **Key Features**: VC verification, DID resolution

#### `ocr/`
- **Purpose**: OCR processing
- **Used By**: Intake service
- **Key Features**: Document OCR, text extraction

#### `payment-gateway/`
- **Purpose**: Payment gateway abstraction
- **Used By**: Finance service
- **Key Features**: Stripe integration, payment processing

## Package Structure

All packages follow a consistent structure:

```
package/
├── src/
│   ├── index.ts              # Main exports
│   └── [module files]
├── tests/                    # Test files
├── package.json              # Package definition
└── README.md                 # Package documentation
```

## Using Packages

### In Services

```typescript
import { createLogger, errorHandler } from '@the-order/shared';
import { getPool, createDocument } from '@the-order/database';
import { IssueVCSchema } from '@the-order/schemas';
```

### In Applications

```typescript
import { Button } from '@the-order/ui';
import { validateSchema } from '@the-order/schemas';
```

## Development

### Building Packages

```bash
# Build all packages
pnpm build

# Build specific package
pnpm --filter @the-order/shared build
```

### Testing Packages

```bash
# Test all packages
pnpm test

# Test specific package
pnpm --filter @the-order/shared test
```

## Package Dependencies

Packages can depend on other packages:
- `shared` → No dependencies
- `database` → `shared`
- `auth` → `shared`, `database`
- Services → Multiple packages

## Related Documentation

- [Project Structure](../PROJECT_STRUCTURE.md)
- [Service Documentation](../services/)
- [Architecture Documentation](../docs/architecture/)

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**Last Updated**: 2025-01-27