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feat: Implement Note Backup and Recovery Tools (Issue #50)#153

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HuiNeng6 wants to merge 3 commits intoANAVHEOBA:mainfrom
HuiNeng6:feature/note-backup-recovery
Open

feat: Implement Note Backup and Recovery Tools (Issue #50)#153
HuiNeng6 wants to merge 3 commits intoANAVHEOBA:mainfrom
HuiNeng6:feature/note-backup-recovery

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@HuiNeng6 HuiNeng6 commented Mar 25, 2026

Summary

Implements Note Backup and Recovery Tools as specified in Issue #50.

Features Implemented

Backup Tools

  • ✅ Encrypted Backup - AES-256-GCM encryption with PBKDF2 key derivation (100,000 iterations)
  • ✅ Export to File - JSON and encrypted formats supported
  • ✅ QR Code Generation - Compact format for notes
  • ✅ Print-friendly Format - Paper backup with warnings

Recovery Tools

  • ✅ Import from File - .json, .bak, .txt supported
  • ✅ Import from QR Code - Parse and validate
  • ✅ Import from Text/Clipboard - Multiple input methods
  • ✅ Decrypt Encrypted Backups - Password-protected decryption
  • ✅ Note Validation - Format and field validation
  • ✅ Batch Management - Preview before confirming

Security Features

  • ✅ AES-256-GCM encryption
  • ✅ PBKDF2 with 100,000 iterations
  • ✅ 32-byte random salt
  • ✅ 12-byte IV for AES-GCM
  • ✅ Minimum 8-character password
  • ✅ Password strength indicator
  • ✅ No plaintext storage

UI Components

  • BackupManager.tsx - Full backup UI with encryption options
  • RecoveryManager.tsx - Import and validate notes
  • Integrated into TransactionSimulator.tsx with tabs

SDK Changes

  • sdk/src/utils/backup.ts - Backup and recovery utilities
  • Exported functions: encryptNotes, decryptNotes, exportNotesToJson, importNotesFromJson,
    oteToQRData, qrDataToNote, �erifyBackup, checkPasswordStrength

Acceptance Criteria

Criteria Status
Backup tools implemented ✅
Recovery tools implemented ✅
Encryption secure ✅ AES-256-GCM + PBKDF2
All formats supported ✅ File, QR, Text, Clipboard
User-friendly UI ✅
Documentation complete ✅ JSDoc comments
Tests pass ⏳ Can be added in follow-up

Testing

  1. Build SDK: cd sdk && npm run build ✅
  2. Build Frontend: cd frontend && npm run build ✅

Screenshots

The UI includes:

  • Tab-based navigation (Deposit, Withdraw, Backup, Recover)
  • Note selection with checkboxes
  • Password strength indicator
  • Multiple export format options
  • Import validation preview

Closes #50

HuiNeng6 added 3 commits March 24, 2026 11:32
@HuiNeng6
feat(sdk): create TypeScript SDK package structure and core utilities
4d8b956 
- Add comprehensive type definitions for privacy pool operations
- Implement cryptographic utilities (Pedersen hash, field elements)
- Add encoding utilities (hex, base64, bigint conversions)
- Add validation utilities (Stellar addresses, hex, field elements)
- Implement PrivacyLayerSDK class with deposit/withdraw methods
- Add 101 unit tests with 100% coverage of utility functions
- Add README with API documentation and usage examples
- Configure TypeScript, ESLint, Prettier, and Jest

Resolves ANAVHEOBA#7
@HuiNeng6
feat: Add Transaction Simulator for deposits and withdrawals
c6d6d76 
- Implemented DepositSimulator with:
  - Denomination selection (XLM/USDC)
  - Address validation
  - Gas estimation
  - Success probability calculation
  - Commitment preview with Merkle tree info
  - Warning and error display

- Implemented WithdrawSimulator with:
  - Note parameter inputs (nullifier, secret)
  - Merkle root validation
  - Recipient/relayer address validation
  - Fee calculation
  - ZK proof status indicators
  - Double-spend detection simulation

- Added glass-card UI design matching PrivacyLayer theme
- Integrated with existing layout and styling

Closes ANAVHEOBA#60
@HuiNeng6
feat: Implement Note Backup and Recovery Tools (Issue ANAVHEOBA#50)
dfd0617 
## Features Implemented

### Backup Tools
- Encrypted backup with AES-256-GCM and PBKDF2 key derivation
- Export to JSON file
- QR code generation for notes
- Print-friendly format
- Password strength checker
- Multiple note selection

### Recovery Tools
- Import from file, QR code, text input, and clipboard
- Decrypt encrypted backups
- Note validation before import
- Batch management with preview

### Security
- AES-256-GCM encryption
- PBKDF2 with 100,000 iterations
- 32-byte salt
- Strong password requirements
- No plaintext storage

### UI Components
- BackupManager.tsx: Full backup UI with encryption
- RecoveryManager.tsx: Import and validate notes
- Integrated into TransactionSimulator with tabs

### SDK Changes
- Added backup.ts utility module
- Exported all backup/recovery functions
- Updated tsconfig for DOM types (Web Crypto API)

## Acceptance Criteria Met
- [x] Backup tools implemented
- [x] Recovery tools implemented
- [x] Encryption secure (AES-256-GCM + PBKDF2)
- [x] All formats supported (file, QR, text, clipboard)
- [x] User-friendly UI with password strength indicator
- [x] Documentation (JSDoc comments)
- [ ] Tests pass (tests can be added in follow-up)
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[BOUNTY] Create Note Backup and Recovery Tools

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@HuiNeng6