Skip to main content

TSD - Profile Picture Management

1. Document Control​

VersionDateAuthorDescription
1.02025-08-13BA TeamInitial Version

Table of Contents​

  1. Overview
  2. Technology Stack
  3. System Architecture Overview
  4. Functional Overview
  5. User Interface
  6. Technical Specification
  7. Integration Requirements
  8. Authentication
  9. Security Considerations
  10. Error Handling
  11. Performance Considerations
  12. Testing Strategy
  13. Monitoring and Analytics
  14. Deployment Considerations
  15. Future Enhancements

1. Overview​

1.1 Purpose​

The profile picture management feature enables users to update and manage their profile pictures in OX Agry application, ensuring alignment with KYC verification processes. It supports automatic updates from Aadhaar verification selfies and manual uploads, with a verification system to ensure trusted identity, user notifications, and an audit trail for transparency.

1.2 Scope​

This TSD covers the complete Profile Picture Management implementation including:

  • Automatic Assignment Flow: Profile picture auto-assignment from Aadhaar verification
  • Manual Upload System: Pre-KYC and post-KYC upload workflows
  • Verification Engine: Face matching with configurable thresholds
  • Review Interface: User-friendly comparison and decision workflows
  • Status Management: Six-state status system with proper transitions
  • Admin Escalation: Manual review queue for failed verifications
  • History Tracking: Comprehensive audit trails and user history
  • Integration Points: KYC system, file management, and notification services

2. Technology Stack​

2.1 Frontend Technologies​

  • Framework: React with TypeScript
  • Routing: Tanstack Router for navigation management
  • Forms: Tanstack Form for form state management
  • Data Fetching: Apollo Client for GraphQL operations
  • State Management: React Context API with hooks
  • UI Components: Custom component library with status-aware components
  • Camera Integration: Browser Camera API for selfie capture
  • Image Processing: Canvas API for image manipulation and preview

2.2 Backend Technologies​

  • Framework: NestJS with TypeScript
  • API Layer: GraphQL with Apollo Server
  • Database ORM: Prisma ORM
  • Authentication: JWT tokens with refresh mechanism
  • File Storage: Cloud storage integration
  • Validation: Class-validator and class-transformer
  • Face Matching: Third-party face matching API integration

2.3 Database and Infrastructure​

  • Primary Database: PostgreSQL 14+
  • Face Matching API: Third-party biometric comparison service
  • Cloud Services: File storage and CDN
  • Caching: Redis for session management
  • Monitoring: Application performance monitoring
  • Queue Management: Redis-based job queue for async processing

3. System Architecture Overview​

3.1 Component Interaction Flow​

Web App (Tanstack Router) ←→ GraphQL API (NestJS) ←→ Database (PostgreSQL)
        ↓                    ↓                      ↓
   Apollo Client      External APIs           Prisma ORM
        ↓                    ↓
   UI Components      [Face Matching API]
                     [File Storage Service]
                     [Notification Service]
                     [KYC Service]

3.2 High-Level Process Flow​

Phase 1: Automatic Assignment

  1. Aadhaar verification completion triggers profile picture check
  2. If no existing picture, auto-assign Aadhaar selfie
  3. Set status to VERIFIED with complete audit trail
  4. Notify user of automatic assignment

Phase 2: Manual Upload Workflows

  1. Pre-KYC Upload: Status NOT_VERIFIED, queued for post-KYC verification
  2. Post-KYC Upload: Immediate face matching against Aadhaar selfie
  3. Verification Result: VERIFIED (≥70% match) or PENDING (<70% match)
  4. Review Process: User comparison interface with action options

Phase 3: Review and Escalation

  1. PENDING status triggers review interface with comparison
  2. User actions: Reupload, Keep Current, or Cancel
  3. After 3 failed attempts, automatic escalation to UNDER_REVIEW
  4. Admin queue management and manual verification process

Phase 4: Status Management

  1. Comprehensive six-state status system
  2. Proper state transitions with validation
  3. Complete history tracking for all actions
  4. Audit compliance and data retention

4. Functional Overview​

4.1 Automatic Profile Picture Assignment​

Purpose: Seamlessly assign Aadhaar verification selfie as profile picture

  • Trigger on successful Aadhaar verification completion
  • Check for existing profile picture status
  • Auto-assign if no picture exists
  • Direct status assignment to VERIFIED
  • User notification of automatic update
  • Complete audit trail creation

4.2 Manual Profile Picture Upload​

Purpose: Allow users to upload custom profile pictures with verification

  • Pre-KYC Workflow: NOT_VERIFIED status with post-KYC verification queue
  • Post-KYC Workflow: Immediate face matching against Aadhaar selfie
  • Support camera capture and gallery selection
  • Image quality validation and preprocessing
  • Status assignment based on verification results

4.3 Face Matching Verification​

Purpose: Intelligent verification using biometric comparison

  • 70% match threshold configuration
  • Comparison against Aadhaar selfie (trusted reference)
  • Real-time processing with timeout handling
  • Match score storage for audit and review
  • Automatic status transitions based on results

4.4 Review and Comparison Interface​

Purpose: User-friendly interface for verification failures

  • Side-by-side image comparison display
  • Match score visualization with threshold indicators
  • Three action options: Reupload, Keep Current, Cancel
  • Attempt counter management (maximum 3 attempts)
  • Session management with expiration handling

4.5 Status Management System​

Purpose: Comprehensive state tracking with six distinct statuses

Status Definitions:

  • VERIFIED: Face match ≥70% with KYC selfie (trusted identity)
  • NOT_VERIFIED: Uploaded before KYC completion (awaiting verification)
  • PENDING: Face match <70%, user action required (max 3 attempts)
  • REJECTED: User chose to keep current after failed match, or admin rejected
  • REPLACED: Superseded by newer version (audit purposes)
  • UNDER_REVIEW: Verification attempts exceed 3 times, moved to admin queue

4.6 Admin Escalation Workflow​

Purpose: Manual review process for complex verification cases

  • Automatic escalation after 3 failed attempts
  • Admin queue with priority management
  • Complete context provision for admin review
  • Admin approval/rejection with reason tracking
  • User notification of admin decisions

4.7 History and Audit Management​

Purpose: Comprehensive tracking and user transparency

  • Complete audit trail for all profile picture activities
  • User-accessible history with timeline view
  • Status transition tracking with reasons
  • Match score and attempt number logging
  • Admin action tracking with notes

5. User Interface​

5.1 Profile Picture Section​

Layout Components:

  • Current profile picture display with zoom capability
  • Status badge with color coding and dynamic text
  • Action buttons based on current status
  • "View History" link for complete audit access

Status Badge System:

  • VERIFIED: Green checkmark badge "Verified" ✓
  • NOT_VERIFIED: Gray badge "Pending KYC Completion"
  • PENDING: Orange pulsing badge "Review Required (X/3)"
  • REJECTED: No badge (current verified photo displayed)
  • UNDER_REVIEW: Blue badge "Under Admin Review" with clock icon
  • REPLACED: Only visible in history view

5.2 Profile Picture Upload Interface​

Layout Components:

  • Camera/Gallery selection modal
  • Image preview with editing capabilities
  • Quality guidelines and tips display
  • Error handling with retry options

Features:

  • Native camera integration for selfie capture
  • Gallery selection with image cropping
  • Real-time image quality validation
  • Upload progress tracking
  • Success/error state feedback

5.3 Review and Comparison Interface​

Layout Components:

  • Header Section:
    • Title: "Review Your Profile Picture"
    • Subtitle: "Compare your new upload with your verified photo"
  • Comparison Panel:
    • Left: "Current picture"
    • Right: "New uoload" with high-quality display"
    • Zoom functionality for detailed comparison
  • Match Information:
    • Large percentage display with color coding
    • Clear threshold statement: "Minimum Required: 70%"
  • Action Buttons:
    • Primary: "Reupload Photo" with subtitle
    • Secondary: "Keep Current Photo" with explanation
    • Tertiary: "Cancel" with future access note
  • Progress Indicator:
    • Attempt counter: "Attempt X of 3"
    • Warning Message: "After 3 attempts, manual review will be required"
    • Progress bar or visual indicator showing attempt progression

5.4 History Viewing Interface​

  • List view with upload date, status, and match score (if applicable)
  • Filterable by status (e.g., Verified, Rejected)

5.5 Notifications​

  • In-app alerts for verification failures and review prompts

5.6 Admin Panel​

  • Interface for manual review, showing photo details, match scores, and approval/rejection options.

6. Technical Specification​

6.1 Frontend Implementation​

6.1.1 Profile Picture Management Screen​

React Components:

ProfilePictureManagementScreen
├── ProfilePictureDisplay
│   ├── ProfileImageWithStatus
│   ├── StatusBadge
│   └── ActionButtonGroup
├── UploadInterface
│   ├── CameraCapture
│   ├── GallerySelector
│   └── ImagePreview
├── ReviewInterface
│   ├── ComparisonPanel
│   ├── MatchInformation
│   └── ActionButtons
└── HistoryInterface
    ├── TimelineView
    ├── FilterControls
    └── EntryDetails

State Management:

  • Profile picture state with Apollo Client
  • Upload progress tracking
  • Review session management
  • Status transition animations
  • Error state handling

6.1.2 Status-Aware Components​

StatusBadge Component Design: The StatusBadge component dynamically renders different visual indicators based on the current profile picture status. The component accepts status, attempt count, and maximum attempts as properties to provide contextual feedback to users.

Design Requirements:

  • Visual Consistency: Each status uses distinct color coding and iconography for immediate recognition
  • Dynamic Content: Badge text updates based on status and attempt progress (e.g., "Review Required (2/3)")
  • Accessibility: Proper ARIA labels and screen reader support for all status states
  • Animation Support: Pulsing animation for PENDING status to draw user attention
  • Responsive Design: Adapts to different screen sizes while maintaining readability

Status Badge Variations:

  • VERIFIED Status: Green background with checkmark icon, "Verified" text
  • NOT_VERIFIED Status: Gray background with clock icon, "Pending KYC" text
  • PENDING Status: Orange background with warning icon, animated pulse effect
  • UNDER_REVIEW Status: Blue background with review icon, "Under Admin Review" text
  • REJECTED Status: No badge displayed (maintains clean UI for current verified photo)

Component Behavior:

  • Conditional Rendering: Only displays when status requires user attention
  • Tooltip Support: Hover states provide additional context about the status
  • Theme Integration: Respects application-wide design system and theming

6.1.3 Review Interface Implementation​

ComparisonPanel Component Design: The ComparisonPanel component provides a side-by-side image comparison interface that allows users to make informed decisions about their profile picture verification. The component focuses on clarity and user-friendly decision making.

Layout Structure:

  • Two-Column Layout: Equal width columns for uploaded image and reference image
  • Image Display Areas: High-quality image rendering with zoom and pan capabilities
  • Clear Labeling: Descriptive labels ("Your Upload" vs "Your Aadhaar Selfie" or "Last Verified Photo")
  • Match Score Section: Prominent display of verification results with visual indicators

Image Handling Features:

  • Zoom Functionality: Click or pinch to zoom for detailed comparison
  • Image Quality: High-resolution display with proper aspect ratio maintenance
  • Loading States: Skeleton loaders while images are being fetched
  • Error Handling: Graceful fallbacks for failed image loads

Match Score Visualization:

  • Percentage Display: Large, prominent match percentage with appropriate color coding
  • Threshold Indicator: Clear marking of the minimum required percentage
  • Color Coding: Red for below threshold, green for above threshold

User Action Interface:

  • Primary Action Button: "Reupload Photo" with descriptive subtitle text
  • Secondary Action Button: "Keep Current Photo (Verified)" with explanation
  • Tertiary Action: "Cancel" link with note about future access
  • Button States: Loading, disabled, and active states for each action
  • Confirmation Dialogs: Modal confirmations for destructive actions

Responsive Considerations:

  • Mobile Layout: Stacked layout on smaller screens with swipe gestures
  • Touch Interactions: Optimized for touch devices with appropriate button sizing
  • Image Comparison: Mobile-friendly image comparison with swipe between images
  • Keyboard Navigation: Full keyboard accessibility for all interactive elements

Context Information Display:

  • Attempt Counter: Prominent display of current attempt number and maximum allowed
  • Warning Messages: Clear warnings for final attempts before admin escalation
  • Help Text: Contextual guidance about the verification process
  • Progress Indicators: Visual indication of where user is in the verification flow

6.2 Backend Implementation​

6.2.1 Database Schema​

Integration with Existing File Management System: The Profile Picture Management system integrates seamlessly with the existing file management schema. Profile pictures utilize the existing File and FileVersion models:

File Record Structure:

  • fileType: PROFILE_PHOTO
  • category: 'profile_picture'
  • subCategory: 'selfie', 'verification_selfie', 'manual_upload', 'admin_approved'
  • entityType: USER
  • entityId: user_id
  • serviceId: 'profile-picture-service'
  • visibility: PRIVATE (for security)

FileVersion Features Utilized:

  • Storage: Leverages existing S3/cloud storage infrastructure
  • Security: Uses existing encryption and virus scanning pipeline
  • Processing: Automatic thumbnail and preview generation
  • Metadata: Stores image EXIF data and processing information
  • Deduplication: File hash-based deduplication prevents duplicate storage
  • Versioning: Complete version history for audit compliance

Profile Picture Specific Metadata:

{
  "imageType": "profile_picture",
  "dimensions": {
    "width": 1024,
    "height": 1024
  },
  "processingInfo": {
    "compressed": true,
    "qualityOptimized": true,
    "faceDetected": true
  },
  "verificationContext": {
    "matchScore": 85.5,
    "referenceFileId": "file_abc123",
    "verificationMethod": "face_matching"
  }
}

Profile_Pictures Table:

Profile_Pictures {
  id: UUID PRIMARY KEY,
  user_id: UUID NOT NULL,
  file_id: VARCHAR(25) NOT NULL, -- References files.id from existing schema

  -- Status Management
  status: ENUM('NOT_VERIFIED', 'VERIFIED', 'PENDING', 'REJECTED', 'REPLACED', 'UNDER_REVIEW') NOT NULL,
  previous_status: ENUM('NOT_VERIFIED', 'VERIFIED', 'PENDING', 'REJECTED', 'REPLACED', 'UNDER_REVIEW'),
  status_changed_at: TIMESTAMP,
  status_changed_by: ENUM('SYSTEM', 'USER', 'ADMIN') DEFAULT 'SYSTEM',
  status_change_reason: VARCHAR(255),

  -- Verification Details
  match_score: DECIMAL(5,2), -- 0.00 to 100.00
  match_threshold: DECIMAL(5,2) DEFAULT 70.00,
  reference_file_id: VARCHAR(25), -- References files.id (Aadhaar selfie reference)
  reference_type: ENUM('AADHAAR_SELFIE', 'VERIFIED_PHOTO'),

  -- Attempt Management
  current_attempt: INTEGER DEFAULT 1,
  max_attempts: INTEGER DEFAULT 3,
  attempt_reset_at: TIMESTAMP,

  -- State Management
  is_current: BOOLEAN DEFAULT FALSE,
  source: ENUM('MANUAL_UPLOAD', 'AADHAAR_VERIFICATION', 'REUPLOAD', 'ADMIN_APPROVED'),

  -- Review Session
  review_session_id: UUID,

  -- Admin Review Context
  escalation_reason: ENUM('MAX_ATTEMPTS', 'SUSPICIOUS_ACTIVITY', 'MANUAL_REQUEST'),
  admin_assigned_to: UUID,
  admin_priority: ENUM('LOW', 'MEDIUM', 'HIGH', 'URGENT') DEFAULT 'MEDIUM',
  admin_notes: TEXT,
  admin_decision_reason: TEXT,

  -- Timestamps
  verified_at: TIMESTAMP,
  escalated_at: TIMESTAMP,
  created_at: TIMESTAMP DEFAULT NOW(),
  updated_at: TIMESTAMP DEFAULT NOW(),

  -- Foreign Keys and Indexes
  FOREIGN KEY (file_id) REFERENCES files(id),
  FOREIGN KEY (reference_file_id) REFERENCES files(id),
  FOREIGN KEY (admin_assigned_to) REFERENCES admin_users(id),

  INDEX idx_user_status (user_id, status),
  INDEX idx_admin_queue (admin_assigned_to, status, escalated_at),
  INDEX idx_current_picture (user_id, is_current)
};

Profile_Picture_History Table:

Profile_Picture_History {
  id: UUID PRIMARY KEY,
  user_id: UUID NOT NULL,
  profile_picture_id: UUID NOT NULL,

  -- Action Details
  action: ENUM('UPLOAD', 'STATUS_CHANGE', 'VERIFICATION_ATTEMPT', 'USER_ACTION', 'ADMIN_ACTION', 'AUTO_ASSIGNMENT'),
  action_description: VARCHAR(500),

  -- Status Transition
  status_from: VARCHAR(50),
  status_to: VARCHAR(50),
  transition_reason: VARCHAR(255),

  -- Context Data
  match_score: DECIMAL(5,2),
  attempt_number: INTEGER,
  reference_used: VARCHAR(255),
  user_action: ENUM('REUPLOAD', 'KEEP_CURRENT', 'CANCEL', 'UPLOAD_NEW'),

  -- Audit Information
  performed_by: ENUM('SYSTEM', 'USER', 'ADMIN'),
  performed_by_user_id: UUID,
  ip_address: VARCHAR(45),
  user_agent: TEXT,

  -- Additional Context
  metadata: JSONB,
  notes: TEXT,

  created_at: TIMESTAMP DEFAULT NOW(),

  FOREIGN KEY (profile_picture_id) REFERENCES profile_pictures(id),
  INDEX idx_user_history (user_id, created_at DESC),
  INDEX idx_picture_timeline (profile_picture_id, created_at DESC)
};

Profile_Picture_Reviews Table:

Profile_Picture_Reviews {
  id: UUID PRIMARY KEY,
  session_id: UUID UNIQUE NOT NULL,
  user_id: UUID NOT NULL,
  profile_picture_id: UUID NOT NULL,

  -- Review Context
  original_picture_file_id: VARCHAR(25),
  reference_picture_file_id: VARCHAR(25),
  reference_type: ENUM('AADHAAR_SELFIE', 'VERIFIED_PHOTO'),
  match_score: DECIMAL(5,2),
  attempt_number: INTEGER,

  -- Session Management
  session_status: ENUM('ACTIVE', 'COMPLETED', 'CANCELLED', 'EXPIRED'),
  user_action: ENUM('REUPLOAD', 'KEEP_CURRENT', 'CANCEL', 'PENDING'),

  -- Timestamps
  created_at: TIMESTAMP DEFAULT NOW(),
  expires_at: TIMESTAMP DEFAULT (NOW() + INTERVAL '24 hours'),
  completed_at: TIMESTAMP,

  FOREIGN KEY (profile_picture_id) REFERENCES profile_pictures(id),
  INDEX idx_active_sessions (user_id, session_status, expires_at)
};

Admin_Review_Queue Table:

Admin_Review_Queue {
  id: UUID PRIMARY KEY,
  user_id: UUID NOT NULL,
  profile_picture_id: UUID NOT NULL,

  -- Queue Management
  priority: ENUM('LOW', 'MEDIUM', 'HIGH', 'URGENT'),
  queue_reason: ENUM('MAX_ATTEMPTS', 'SUSPICIOUS_ACTIVITY', 'MANUAL_REQUEST'),
  context_data: JSONB, -- All relevant context for admin

  -- Assignment
  assigned_to: UUID,
  status: ENUM('PENDING', 'IN_PROGRESS', 'COMPLETED', 'ESCALATED'),

  -- SLA Tracking
  escalated_at: TIMESTAMP DEFAULT NOW(),
  assigned_at: TIMESTAMP,
  completed_at: TIMESTAMP,
  sla_due_at: TIMESTAMP DEFAULT (NOW() + INTERVAL '48 hours'),

  FOREIGN KEY (profile_picture_id) REFERENCES profile_pictures(id),
  FOREIGN KEY (assigned_to) REFERENCES admin_users(id),
  INDEX idx_admin_queue (assigned_to, status, sla_due_at)
};

6.2.2 GraphQL Schema​

Mutations:

type Mutation {
  # Upload Operations
  uploadProfilePicture(
    input: ProfilePictureUploadInput!
  ): ProfilePictureUploadResponse!

  # System Operations
  autoAssignAadhaarSelfie(userId: ID!): ProfilePictureResponse!

  # Review Workflow
  initiateProfilePictureReview(
    profilePictureId: ID!
  ): ProfilePictureReviewSession!

  submitReviewAction(input: ReviewActionInput!): ReviewActionResponse!

  reuploadProfilePicture(input: ReuploadInput!): ProfilePictureUploadResponse!

  # Admin Operations
  adminApproveProfilePicture(input: AdminApprovalInput!): AdminActionResponse!

  adminRejectProfilePicture(input: AdminRejectionInput!): AdminActionResponse!

  assignAdminReview(queueId: ID!, adminId: ID!): AdminAssignmentResponse!
}

input ProfilePictureUploadInput {
  image: Upload!
  source: ProfilePictureSource = MANUAL_UPLOAD
}

input ReviewActionInput {
  sessionId: ID!
  action: ReviewAction!
}

enum ReviewAction {
  REUPLOAD
  KEEP_CURRENT
  CANCEL
}

input ReuploadInput {
  sessionId: ID!
  image: Upload!
}

type ProfilePictureUploadResponse {
  success: Boolean!
  profilePicture: ProfilePicture
  reviewSession: ProfilePictureReviewSession
  requiresReview: Boolean!
  message: String!
  error: String
  nextAction: String
}

7. Integration Requirements​

7.1 External API Integrations​

Face Matching API:

  • Designated API integration for biometric comparison
  • Image preprocessing and quality validation
  • Configurable match threshold (default 70%)
  • Response validation and error handling
  • Performance monitoring and timeout management
  • Fallback mechanisms for API failures

File Storage Service:

  • Secure image upload with encryption at rest
  • CDN integration for fast image delivery
  • Automatic thumbnail generation
  • Image compression and optimization
  • Access control and signed URLs
  • Backup and disaster recovery

7.2 Internal Service Integration​

File Management Service Integration:

  • File Storage: Leverage existing file management system with full FileVersion support
  • Storage Infrastructure: Use existing S3/cloud storage with bucket management
  • File Processing Pipeline:
    • Automatic thumbnail generation via existing processing system
    • Preview image generation for comparison interface
    • Virus scanning integration for security
    • Image compression and optimization
  • File Categories: Use standardized file categorization:
    • fileType: PROFILE_PHOTO
    • category: 'profile_picture'
    • subCategory: 'selfie', 'verification_selfie', 'manual_upload', 'admin_approved'
    • entityType: USER
    • visibility: PRIVATE
  • File Versioning: Utilize existing FileVersion system for complete audit trail
  • File Security:
    • Encryption at rest using existing encryption pipeline
    • Virus scanning for uploaded images
    • Secure file hash generation for deduplication
  • File Access Control: Integrate with existing access control mechanisms
  • CDN Integration: Use existing CDN setup for optimized image delivery
  • Metadata Storage: Store profile picture specific metadata in FileVersion.metadata: 
    {
      "imageType": "profile_picture",
      "verificationContext": {
        "matchScore": 85.5,
        "referenceFileId": "file_abc123"
      },
      "processingInfo": {
        "faceDetected": true,
        "qualityScore": 92
      }
    }

KYC Verification Service:

  • Aadhaar verification completion events
  • Selfie retrieval from verification process using existing file references
  • User verification status queries
  • Integration with verification webhooks

User Management Service:

  • User profile updates with profile picture file references
  • Permission and role validation
  • User notification preferences
  • Account status integration

Notification Service:

  • Push notification delivery for status updates
  • In-app notification badges and alerts
  • Email notifications for admin actions
  • SMS notifications for critical updates
  • Template management for consistent messaging

7.3 Admin Dashboard Integration​

Admin Queue Management:

  • Real-time queue updates and assignments
  • Priority management and SLA tracking
  • Bulk operations for queue processing
  • Performance analytics and reporting
  • Escalation workflows for complex cases

8. Authentication​

8.1 JWT Token Management​

Access Token:

  • Short expiration (15 minutes) for security
  • User claims including profile picture permissions
  • Role-based access control integration
  • Secure signing with RS256 algorithm

Refresh Token:

  • Extended expiration (7 days) for user convenience
  • Secure storage with HTTP-only cookies
  • Automatic rotation on usage
  • Revocation capability for security incidents

8.2 Authorization Levels​

User Permissions:

  • Profile Owner: Full access to own profile picture management
  • Basic User: View access to public profile pictures
  • Admin User: Access to admin review queue and manual approval
  • System Admin: Full system access and configuration management

8.3 API Security​

  • GraphQL query depth limiting and complexity analysis
  • Rate limiting per user and IP address
  • Request signature validation for sensitive operations
  • Input sanitization and validation
  • SQL injection and XSS protection

9. Security Considerations​

9.1 Data Protection​

Encryption Standards:

  • AES-256 encryption for profile pictures at rest
  • TLS 1.3 for data in transit
  • End-to-end encryption for face matching API calls
  • Secure key management with rotation policies

Privacy Controls:

  • User consent management for automatic assignments
  • Data minimization for face matching operations
  • Right to deletion with secure cleanup procedures
  • Data portability for user history exports

9.2 Face Matching Security​

API Security:

  • Secure communication channels with certificate pinning
  • Request/response validation and sanitization
  • Rate limiting and abuse prevention
  • Audit logging for all face matching operations

Data Handling:

  • Temporary storage for face matching operations
  • Automatic cleanup of processing artifacts
  • No permanent storage of biometric templates
  • Compliance with biometric data regulations

9.3 Access Control​

Image Access Security:

  • Signed URLs with expiration for image access
  • User-based access control for profile pictures
  • Admin access logging and audit trails
  • Secure file deletion with overwriting

10. Error Handling​

10.1 Frontend Error Handling​

Upload Errors:

  • File size validation (maximum 10MB)
  • Image format validation (JPEG, PNG, WEBP)
  • Image quality assessment and feedback
  • Network connectivity error handling
  • Retry mechanisms with exponential backoff

User Experience:

  • Graceful degradation for offline scenarios
  • Clear error messages with actionable guidance
  • Progress indicators with cancellation options
  • Form validation with real-time feedback

10.2 Backend Error Handling​

API Error Management:

  • Standardized error response format
  • Error code classification and handling
  • Detailed error logging with correlation IDs
  • Circuit breaker pattern for external APIs

Face Matching Errors:

  • API timeout handling (30 seconds maximum)
  • Image quality validation before processing
  • Fallback to manual review for API failures
  • Retry logic with exponential backoff

10.3 Database Error Handling​

Transaction Management:

  • ACID compliance for status transitions
  • Rollback mechanisms for failed operations
  • Deadlock detection and resolution
  • Connection pool management

11. Performance Considerations​

11.1 Frontend Optimization​

Image Handling:

  • Lazy loading for profile picture galleries
  • Progressive image loading with placeholders
  • Image compression before upload
  • WebP format support for modern browsers
  • Responsive image sizing for different devices

Component Optimization:

  • React.memo for expensive rendering operations
  • Virtual scrolling for history lists
  • Code splitting for review interface
  • Service worker caching for offline support

11.2 Backend Optimization​

Database Performance:

  • Proper indexing for query optimization
  • Connection pooling for database efficiency
  • Query optimization with EXPLAIN analysis
  • Pagination for large result sets
  • Read replicas for history queries

API Performance:

  • GraphQL query optimization and caching
  • Response compression with gzip
  • CDN integration for static assets
  • Redis caching for frequently accessed data

11.3 Scalability Requirements​

Horizontal Scaling:

  • Stateless API design for load balancing
  • Queue-based processing for face matching
  • Microservice architecture readiness
  • Database sharding considerations

Performance Targets:

  • Profile picture upload: < 3 seconds
  • Face matching: < 10 seconds
  • History loading: < 2 seconds
  • Review interface: < 1 second load time

12. Testing Strategy​

12.1 Unit Testing​

Frontend Testing:

  • React component testing with React Testing Library
  • Hook testing for profile picture state management
  • Image processing utility testing
  • Form validation and error handling testing
  • Mock API integration testing

Backend Testing:

  • Service layer unit tests with Jest
  • Repository layer testing with test database
  • GraphQL resolver testing with mocked dependencies
  • Face matching integration testing with mock API
  • Status transition logic testing

Coverage Requirements:

  • Minimum 80% code coverage for critical paths
  • 100% coverage for status transition logic
  • Complete error handling path testing

12.2 Integration Testing​

API Integration Testing:

  • GraphQL schema validation
  • End-to-end mutation testing
  • File upload integration testing
  • Face matching API integration
  • Database transaction testing

External Service Testing:

  • Face matching API mock testing
  • File storage integration testing
  • Notification service integration
  • KYC service integration testing

12.3 User Acceptance Testing​

Workflow Testing:

  • Complete profile picture upload workflows
  • Review interface usability testing
  • Admin queue management testing
  • History viewing functionality testing

Cross-Platform Testing:

  • Mobile device testing (iOS/Android)
  • Browser compatibility testing
  • Camera integration testing
  • Responsive design validation

Accessibility Testing:

  • Screen reader compatibility
  • Keyboard navigation testing
  • Color contrast validation
  • ARIA label verification

13. Monitoring and Analytics​

13.1 Key Metrics​

Business Metrics:

  • Profile picture upload success rate
  • Face matching accuracy and false positive rates
  • Review completion rate by attempt number
  • Admin queue processing time and SLA compliance
  • User satisfaction scores for review process

Technical Metrics:

  • API response times for upload and verification
  • Face matching API performance and availability
  • Database query performance for history operations
  • Error rates by component and operation type
  • Resource utilization and scaling indicators

13.2 Alerting​

Business Alerts:

  • High verification failure rates (>30% in 1 hour)
  • Admin queue SLA breaches (>48 hours)
  • Unusual upload patterns indicating fraud
  • User abandonment in review process (>50%)

Technical Alerts:

  • Face matching API failures or timeouts
  • Database performance degradation
  • High error rates in critical operations
  • Storage quota warnings and limits
  • Security incidents and suspicious activities

13.3 Logging​

Structured Logging:

  • Correlation IDs for request tracking
  • User action logging with privacy compliance
  • Status transition logging with full context
  • Performance metrics logging
  • Security event logging with threat intelligence

Log Retention:

  • Application logs: 90 days
  • Audit logs: 7 years for compliance
  • Performance logs: 1 year
  • Security logs: 5 years
  • User action logs: 3 years

14. Deployment Considerations​

14.1 Environment Variables​

  • CASHFREE_API_KEY: Cashfree API credentials.
  • AWS_S3_BUCKET: S3 bucket name (FileVersion.bucketName).
  • JWT_SECRET: Secret for JWT token generation.
  • DATABASE_URL: PostgreSQL connection string for Prisma.

14.2 Feature Flags​

Profile Picture Features:

  • Enable/disable automatic profile picture updates.
  • Toggle manual review escalation for testing (FileVersion.metadata: Under Review).

14.3 Rollback Strategy​

Database Rollback:

  • Migration rollback scripts for schema changes
  • Data backup before major deployments
  • Blue-green deployment for zero-downtime rollbacks
  • Feature flag immediate disabling capability

Application Rollback:

  • Container-based deployment with version tags
  • Load balancer configuration for traffic switching
  • API versioning for backward compatibility
  • Gradual rollout with monitoring checkpoints

15. Future Enhancements​

15.1 Advanced Features​

Enhanced Verification:

  • Liveness detection for selfie verification
  • Multi-factor biometric authentication
  • Blockchain-based verification records
  • AI-powered fraud detection and prevention

User Experience Improvements:

  • Smart cropping suggestions for uploaded images
  • Real-time quality feedback during capture
  • Personalized verification tips and guidance
  • Voice-guided verification process

15.2 Technical Improvements​

Architecture Enhancements:

  • Microservices architecture with service mesh
  • Event-driven architecture with message queues
  • Machine learning pipeline for match optimization
  • Real-time analytics dashboard for admins

Performance Optimizations:

  • Edge computing for face matching processing
  • Advanced caching strategies with Redis Cluster
  • Database partitioning for improved query performance
  • Progressive Web App capabilities for offline support

15.3 Integration Expansions​

Third-Party Integrations:

  • Multiple face matching providers for redundancy
  • Social media profile picture import
  • Government ID verification services
  • Credit bureau identity verification

Platform Extensions:

  • Web dashboard for comprehensive management
  • Mobile SDK for third-party integrations
  • API gateway for external partner access
  • Webhook system for real-time integrations