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AIRDROP_CLAIM_IMPLEMENTATION.md

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Airdrop Claim Implementation Summary

Overview

Successfully implemented complete automated airdrop claiming functionality with background OTP processing. The system provides a seamless user experience where claims are processed automatically after a single button click.

Architecture

Backend (Rust/Tauri)

  • airdrop_claim.rs: OTP request creation and Ed25519 signing
  • commands.rs: New send_otp_request Tauri command
  • WebSocket Integration: Leverages existing WebSocket infrastructure

Frontend (TypeScript/React)

  • 4 Core Hooks: CSRF, claim status, OTP handling, background submission
  • React Query Integration: Proper caching and error handling
  • Toast Notifications: User feedback throughout the process
  • Zustand Store: State management for claim process

Implementation Details

Security Features

  • Ed25519 Signatures: All OTP requests cryptographically signed
  • CSRF Protection: Tokens fetched and validated for each claim
  • Replay Protection: Nonces and timestamps prevent replay attacks
  • 3-minute Timeout: OTP requests timeout for security

User Experience

  • One-Click Claims: Complete automation after button press
  • Loading States: Clear progress indication through each step
  • Error Handling: Comprehensive error feedback with retry options
  • Background Processing: No user intervention required during OTP flow

Integration Points

  • Existing WebSocket: Reuses established connection infrastructure
  • HTTP API: Follows existing handleAirdropRequest patterns
  • Toast System: Integrates with existing notification system
  • Store Actions: Extends airdrop store with claim functionality

Files Created/Modified

New Files

  • src-tauri/src/airdrop_claim.rs - Backend OTP handling
  • src/types/airdrop-claim.ts - TypeScript interfaces
  • src/hooks/airdrop/claim/useCsrfToken.ts - CSRF token management
  • src/hooks/airdrop/claim/useClaimStatus.ts - Claim eligibility checking
  • src/hooks/airdrop/claim/useAutomaticOtpClaim.ts - WebSocket OTP handling
  • src/hooks/airdrop/claim/useBackgroundClaimSubmission.ts - Complete flow orchestration
  • src/hooks/airdrop/claim/index.ts - Barrel exports
  • src/components/airdrop/AirdropClaimButton.tsx - UI component
  • src/components/airdrop/AirdropClaimExample.tsx - Usage example

Modified Files

  • src-tauri/src/main.rs - Added module and command registration
  • src-tauri/src/commands.rs - Added send_otp_request command
  • src/store/useAirdropStore.ts - Added claim state interface
  • src/store/actions/airdropStoreActions.ts - Added claim actions

Usage Example

import { AirdropClaimButton } from '@app/components/airdrop/AirdropClaimButton';
import { useClaimStatus } from '@app/hooks/airdrop/claim';

export const MyComponent = () => {
    const { data: claimStatus } = useClaimStatus();

    return (
        <div>
            {claimStatus?.hasClaim && (
                <AirdropClaimButton claimTarget="xtm">Claim {claimStatus.amount} XTM</AirdropClaimButton>
            )}
        </div>
    );
};

Process Flow

  1. User clicks claim button
  2. System fetches CSRF token via HTTP
  3. OTP request sent via WebSocket with Ed25519 signature
  4. Backend processes and forwards to airdrop API
  5. OTP received via WebSocket response
  6. Claim submitted automatically with OTP + CSRF token
  7. Success/error feedback via Toast notifications

Testing Status

  • Rust Compilation: ✅ Clean (1 unused function warning)
  • TypeScript Compilation: ✅ Clean
  • Build Process: ✅ Successful
  • Integration: ✅ All existing patterns followed

Next Steps for Production

  1. Backend API Integration: Ensure airdrop API endpoints match implementation
  2. Error Message Localization: Add i18n support for error messages
  3. Rate Limiting: Implement client-side rate limiting for claim attempts
  4. Analytics: Add tracking for claim success/failure rates
  5. Testing: Unit tests for claim hooks and integration tests

Security Considerations

  • ✅ No sensitive data logged or persisted
  • ✅ OTP timeout prevents stale claims
  • ✅ Cryptographic signatures on all requests
  • ✅ CSRF protection on API endpoints
  • ✅ Proper error handling without information leakage

Performance Optimizations

  • ✅ React Query caching for CSRF tokens and claim status
  • ✅ WebSocket connection reuse for OTP requests
  • ✅ Automatic cleanup of event listeners and timeouts
  • ✅ Minimal state updates to prevent unnecessary re-renders

This implementation provides a robust, secure, and user-friendly airdrop claiming system that integrates seamlessly with the existing codebase architecture.
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