# ChittyChain Cloud Server Requirements

## Core Functionality

### 1. Case Management API
```python
# Primary endpoints
POST   /api/v1/cases/create
GET    /api/v1/cases/{case_id}
POST   /api/v1/cases/{case_id}/artifacts
GET    /api/v1/cases/{case_id}/artifacts/{artifact_id}
POST   /api/v1/cases/{case_id}/parties/add
GET    /api/v1/cases/{case_id}/timeline
POST   /api/v1/cases/{case_id}/events/add
```

### 2. Evidence Chain API
```python
# Immutable evidence storage
POST   /api/v1/evidence/upload
GET    /api/v1/evidence/{evidence_id}
POST   /api/v1/evidence/{evidence_id}/verify
GET    /api/v1/evidence/{evidence_id}/chain-of-custody
POST   /api/v1/evidence/{evidence_id}/hash-verify
```

### 3. Document Processing Pipeline
```python
# Automated document handling
POST   /api/v1/documents/extract-text
POST   /api/v1/documents/ocr
POST   /api/v1/documents/classify
POST   /api/v1/documents/redact-pii
POST   /api/v1/documents/generate-filing
GET    /api/v1/documents/{doc_id}/metadata
```

### 4. Court Integration API
```python
# E-filing and court system integration
POST   /api/v1/filing/validate
POST   /api/v1/filing/submit
GET    /api/v1/filing/{filing_id}/status
POST   /api/v1/filing/serve-parties
GET    /api/v1/courts/{jurisdiction}/requirements
GET    /api/v1/courts/{jurisdiction}/deadlines
```

### 5. Timeline & Calendar API
```python
# Critical date tracking
POST   /api/v1/timeline/add-event
GET    /api/v1/timeline/{case_id}/critical-dates
POST   /api/v1/calendar/calculate-deadline
GET    /api/v1/calendar/{case_id}/upcoming
POST   /api/v1/alerts/configure
```

### 6. Authentication & Access Control
```python
# Multi-party secure access
POST   /api/v1/auth/register
POST   /api/v1/auth/login
POST   /api/v1/auth/verify-2fa
GET    /api/v1/auth/permissions/{case_id}
POST   /api/v1/auth/grant-access
```

## Data Storage Requirements

### 1. Structured Data (PostgreSQL)
- Case metadata and relationships
- User profiles and permissions
- Court filing records
- Timeline events
- Audit logs

### 2. Document Storage (S3-compatible)
- Original documents (encrypted)
- Generated filings
- Court stamps/receipts
- Evidence files
- Email archives

### 3. Cache Layer (Redis)
- Session management
- API rate limiting
- Temporary document processing
- Real-time notifications

### 4. Blockchain/Immutable Layer
- Evidence hashes
- Chain of custody records
- Critical event timestamps
- Artifact bindings

## Processing Capabilities

### 1. Document Generation
- Court-compliant PDF generation
- Template-based filing creation
- Automatic formatting to jurisdiction rules
- Certificate of service generation

### 2. OCR & Text Extraction
- Handwritten document processing
- Multi-format support (PDF, images, emails)
- Metadata extraction
- Searchable text generation

### 3. Email Processing
- .eml/.msg file parsing
- Header extraction for authentication
- Attachment processing
- Thread reconstruction

### 4. Timeline Analysis
- Automatic deadline calculation
- Statute of limitations tracking
- Notice period computation
- Critical date alerts

### 5. Evidence Verification
- Hash verification
- Timestamp validation
- Digital signature verification
- Metadata preservation

## Security Requirements

### 1. Encryption
- TLS 1.3 for all API calls
- AES-256 for data at rest
- End-to-end encryption for sensitive docs
- Key management service integration

### 2. Access Control
- Role-based permissions (Party, Attorney, Court)
- Case-specific access boundaries
- IP whitelisting for sensitive operations
- Audit trail for all access

### 3. Compliance
- HIPAA-compliant infrastructure
- SOC 2 Type II certification
- GDPR data handling
- State bar ethics compliance

## Integration Points

### 1. Court E-Filing Systems
- Odyssey eFileIL
- PACER federal courts
- State-specific systems
- Service of process vendors

### 2. Legal Research
- Case law databases
- Statute lookups
- Rule verification
- Form libraries

### 3. Payment Processing
- Filing fee handling
- Client billing
- Trust account management
- Fee waiver processing

### 4. Communication
- Secure messaging between parties
- Court notification handling
- Service confirmation
- Deadline reminders

## Performance Requirements

### 1. API Response Times
- Document upload: < 5 seconds for 50MB
- Search queries: < 500ms
- Timeline generation: < 1 second
- Evidence verification: < 2 seconds

### 2. Availability
- 99.9% uptime SLA
- Multi-region deployment
- Automatic failover
- Disaster recovery < 4 hours

### 3. Scalability
- Handle 10,000+ concurrent cases
- 100GB+ evidence per case
- 1M+ API calls per day
- Auto-scaling infrastructure

## Deployment Architecture

```yaml
Infrastructure:
  LoadBalancer:
    - AWS ALB or Cloudflare
  
  API Servers:
    - 3+ instances (auto-scaling)
    - Docker containers
    - Kubernetes orchestration
  
  Databases:
    - Primary PostgreSQL (RDS)
    - Read replicas for scaling
    - Redis cluster for caching
  
  Storage:
    - S3 for documents
    - CloudFront CDN
    - Glacier for archives
  
  Processing:
    - Lambda functions for OCR
    - SQS for job queuing
    - Step Functions for workflows
```

## Cost Optimization

### 1. Tiered Storage
- Hot: Recent case documents (S3 Standard)
- Warm: Active cases > 30 days (S3 IA)
- Cold: Closed cases (Glacier)

### 2. Compute Optimization
- Spot instances for batch processing
- Lambda for sporadic tasks
- Reserved instances for core API

### 3. Data Transfer
- CloudFront for document delivery
- Direct Connect for court systems
- Compression for all API responses

## Monitoring & Analytics

### 1. System Metrics
- API latency tracking
- Error rate monitoring
- Storage usage alerts
- Cost anomaly detection

### 2. Business Metrics
- Cases processed
- Documents filed
- User engagement
- Revenue tracking

### 3. Compliance Reporting
- Access audit logs
- Evidence chain reports
- Data retention compliance
- Security scan results

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This architecture supports the ChittyChain vision while maintaining security, compliance, and performance for legal operations at scale.