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# Database Migration Guide
## Overview
The Database Migration feature allows you to compare and migrate data between Dexie (IndexedDB) and SQLite databases in the TimeSafari application. This is particularly useful during the transition from the old Dexie-based storage system to the new SQLite-based system.
## Features
### 1. Database Comparison
- Compare data between Dexie and SQLite databases
- View detailed differences in contacts and settings
- Identify added, modified, and missing records
- Export comparison results for analysis
### 2. Data Migration
- Migrate contacts from Dexie to SQLite
- Migrate settings from Dexie to SQLite
- Option to overwrite existing records or skip them
- Comprehensive error handling and reporting
### 3. User Interface
- Modern, responsive UI built with Tailwind CSS
- Real-time loading states and progress indicators
- Clear success and error messaging
- Export functionality for comparison data
## Prerequisites
### Enable Dexie Database
Before using the migration features, you must enable the Dexie database by setting:
```typescript
// In constants/app.ts
export const USE_DEXIE_DB = true;
```
**Note**: This should only be enabled temporarily during migration. Remember to set it back to `false` after migration is complete.
## Accessing the Migration Interface
1. Navigate to the **Account** page in the TimeSafari app
2. Scroll down to find the **Database Migration** link
3. Click the link to open the migration interface
## Using the Migration Interface
### Step 1: Compare Databases
1. Click the **"Compare Databases"** button
2. The system will retrieve data from both Dexie and SQLite databases
3. Review the comparison results showing:
- Summary counts for each database
- Detailed differences (added, modified, missing records)
- Specific records that need attention
### Step 2: Review Differences
The comparison results are displayed in several sections:
#### Summary Cards
- **Dexie Contacts**: Number of contacts in Dexie database
- **SQLite Contacts**: Number of contacts in SQLite database
- **Dexie Settings**: Number of settings in Dexie database
- **SQLite Settings**: Number of settings in SQLite database
#### Contact Differences
- **Added**: Contacts in Dexie but not in SQLite
- **Modified**: Contacts that differ between databases
- **Missing**: Contacts in SQLite but not in Dexie
#### Settings Differences
- **Added**: Settings in Dexie but not in SQLite
- **Modified**: Settings that differ between databases
- **Missing**: Settings in SQLite but not in Dexie
### Step 3: Configure Migration Options
Before migrating data, configure the migration options:
- **Overwrite existing records**: When enabled, existing records in SQLite will be updated with data from Dexie. When disabled, existing records will be skipped.
### Step 4: Migrate Data
#### Migrate Contacts
1. Click the **"Migrate Contacts"** button
2. The system will transfer contacts from Dexie to SQLite
3. Review the migration results showing:
- Number of contacts successfully migrated
- Any warnings or errors encountered
#### Migrate Settings
1. Click the **"Migrate Settings"** button
2. The system will transfer settings from Dexie to SQLite
3. Review the migration results showing:
- Number of settings successfully migrated
- Any warnings or errors encountered
### Step 5: Export Comparison (Optional)
1. Click the **"Export Comparison"** button
2. A JSON file will be downloaded containing the complete comparison data
3. This file can be used for analysis or backup purposes
## Migration Process Details
### Contact Migration
The contact migration process:
1. **Retrieves** all contacts from Dexie database
2. **Checks** for existing contacts in SQLite by DID
3. **Inserts** new contacts or **updates** existing ones (if overwrite is enabled)
4. **Handles** complex fields like `contactMethods` (JSON arrays)
5. **Reports** success/failure for each contact
### Settings Migration
The settings migration process:
1. **Retrieves** all settings from Dexie database
2. **Focuses** on key user-facing settings:
- `firstName`
- `isRegistered`
- `profileImageUrl`
- `showShortcutBvc`
- `searchBoxes`
3. **Preserves** other settings in SQLite
4. **Reports** success/failure for each setting
## Error Handling
### Common Issues
#### Dexie Database Not Enabled
**Error**: "Dexie database is not enabled"
**Solution**: Set `USE_DEXIE_DB = true` in `constants/app.ts`
#### Database Connection Issues
**Error**: "Failed to retrieve Dexie contacts"
**Solution**: Check that the Dexie database is properly initialized and accessible
#### SQLite Query Errors
**Error**: "Failed to retrieve SQLite contacts"
**Solution**: Verify that the SQLite database is properly set up and the platform service is working
#### Migration Failures
**Error**: "Migration failed: [specific error]"
**Solution**: Review the error details and check data integrity in both databases
### Error Recovery
1. **Review** the error messages carefully
2. **Check** the browser console for additional details
3. **Verify** database connectivity and permissions
4. **Retry** the operation if appropriate
5. **Export** comparison data for manual review if needed
## Best Practices
### Before Migration
1. **Backup** your data if possible
2. **Test** the migration on a small dataset first
3. **Verify** that both databases are accessible
4. **Review** the comparison results before migrating
### During Migration
1. **Don't** interrupt the migration process
2. **Monitor** the progress and error messages
3. **Note** any warnings or skipped records
4. **Export** comparison data for reference
### After Migration
1. **Verify** that data was migrated correctly
2. **Test** the application functionality
3. **Disable** Dexie database (`USE_DEXIE_DB = false`)
4. **Clean up** any temporary files or exports
## Technical Details
### Database Schema
The migration handles the following data structures:
#### Contacts Table
```typescript
interface Contact {
did: string; // Decentralized Identifier
name: string; // Contact name
contactMethods: ContactMethod[]; // Array of contact methods
nextPubKeyHashB64: string; // Next public key hash
notes: string; // Contact notes
profileImageUrl: string; // Profile image URL
publicKeyBase64: string; // Public key in base64
seesMe: boolean; // Visibility flag
registered: boolean; // Registration status
}
```
#### Settings Table
```typescript
interface Settings {
id: number; // Settings ID
accountDid: string; // Account DID
activeDid: string; // Active DID
firstName: string; // User's first name
isRegistered: boolean; // Registration status
profileImageUrl: string; // Profile image URL
showShortcutBvc: boolean; // UI preference
searchBoxes: any[]; // Search configuration
// ... other fields
}
```
### Migration Logic
The migration service uses sophisticated comparison logic:
1. **Primary Key Matching**: Uses DID for contacts, ID for settings
2. **Deep Comparison**: Compares all fields including complex objects
3. **JSON Handling**: Properly handles JSON fields like `contactMethods` and `searchBoxes`
4. **Conflict Resolution**: Provides options for handling existing records
### Performance Considerations
- **Batch Processing**: Processes records one by one for reliability
- **Error Isolation**: Individual record failures don't stop the entire migration
- **Memory Management**: Handles large datasets efficiently
- **Progress Reporting**: Provides real-time feedback during migration
## Troubleshooting
### Migration Stuck
If the migration appears to be stuck:
1. **Check** the browser console for errors
2. **Refresh** the page and try again
3. **Verify** database connectivity
4. **Check** for large datasets that might take time
### Incomplete Migration
If migration doesn't complete:
1. **Review** error messages
2. **Check** data integrity in both databases
3. **Export** comparison data for manual review
4. **Consider** migrating in smaller batches
### Data Inconsistencies
If you notice data inconsistencies:
1. **Export** comparison data
2. **Review** the differences carefully
3. **Manually** verify critical records
4. **Consider** selective migration of specific records
## Support
For issues with the Database Migration feature:
1. **Check** this documentation first
2. **Review** the browser console for error details
3. **Export** comparison data for analysis
4. **Contact** the development team with specific error details
## Security Considerations
- **Data Privacy**: Migration data is processed locally and not sent to external servers
- **Access Control**: Only users with access to the account can perform migration
- **Data Integrity**: Migration preserves data integrity and handles conflicts gracefully
- **Audit Trail**: Export functionality provides an audit trail of migration operations
---
**Note**: This migration tool is designed for the transition period between database systems. Once migration is complete and verified, the Dexie database should be disabled to avoid confusion and potential data conflicts.

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@@ -3,6 +3,7 @@
## Schema Mapping
### Current Dexie Schema
```typescript
// Current Dexie schema
const db = new Dexie('TimeSafariDB');
@@ -15,6 +16,7 @@ db.version(1).stores({
```
### New SQLite Schema
```sql
-- New SQLite schema
CREATE TABLE accounts (
@@ -50,6 +52,7 @@ CREATE INDEX idx_settings_updated_at ON settings(updated_at);
### 1. Account Operations
#### Get Account by DID
```typescript
// Dexie
const account = await db.accounts.get(did);
@@ -62,6 +65,7 @@ const account = result[0]?.values[0];
```
#### Get All Accounts
```typescript
// Dexie
const accounts = await db.accounts.toArray();
@@ -74,6 +78,7 @@ const accounts = result[0]?.values || [];
```
#### Add Account
```typescript
// Dexie
await db.accounts.add({
@@ -91,6 +96,7 @@ await db.run(`
```
#### Update Account
```typescript
// Dexie
await db.accounts.update(did, {
@@ -100,7 +106,7 @@ await db.accounts.update(did, {
// absurd-sql
await db.run(`
UPDATE accounts
UPDATE accounts
SET public_key_hex = ?, updated_at = ?
WHERE did = ?
`, [publicKeyHex, Date.now(), did]);
@@ -109,6 +115,7 @@ await db.run(`
### 2. Settings Operations
#### Get Setting
```typescript
// Dexie
const setting = await db.settings.get(key);
@@ -121,6 +128,7 @@ const setting = result[0]?.values[0];
```
#### Set Setting
```typescript
// Dexie
await db.settings.put({
@@ -142,6 +150,7 @@ await db.run(`
### 3. Contact Operations
#### Get Contacts by Account
```typescript
// Dexie
const contacts = await db.contacts
@@ -151,7 +160,7 @@ const contacts = await db.contacts
// absurd-sql
const result = await db.exec(`
SELECT * FROM contacts
SELECT * FROM contacts
WHERE did = ?
ORDER BY created_at DESC
`, [accountDid]);
@@ -159,6 +168,7 @@ const contacts = result[0]?.values || [];
```
#### Add Contact
```typescript
// Dexie
await db.contacts.add({
@@ -179,6 +189,7 @@ await db.run(`
## Transaction Mapping
### Batch Operations
```typescript
// Dexie
await db.transaction('rw', [db.accounts, db.contacts], async () => {
@@ -210,10 +221,11 @@ try {
## Migration Helper Functions
### 1. Data Export (Dexie to JSON)
```typescript
async function exportDexieData(): Promise<MigrationData> {
const db = new Dexie('TimeSafariDB');
return {
accounts: await db.accounts.toArray(),
settings: await db.settings.toArray(),
@@ -228,6 +240,7 @@ async function exportDexieData(): Promise<MigrationData> {
```
### 2. Data Import (JSON to absurd-sql)
```typescript
async function importToAbsurdSql(data: MigrationData): Promise<void> {
await db.exec('BEGIN TRANSACTION;');
@@ -239,7 +252,7 @@ async function importToAbsurdSql(data: MigrationData): Promise<void> {
VALUES (?, ?, ?, ?)
`, [account.did, account.publicKeyHex, account.createdAt, account.updatedAt]);
}
// Import settings
for (const setting of data.settings) {
await db.run(`
@@ -247,7 +260,7 @@ async function importToAbsurdSql(data: MigrationData): Promise<void> {
VALUES (?, ?, ?)
`, [setting.key, setting.value, setting.updatedAt]);
}
// Import contacts
for (const contact of data.contacts) {
await db.run(`
@@ -264,6 +277,7 @@ async function importToAbsurdSql(data: MigrationData): Promise<void> {
```
### 3. Verification
```typescript
async function verifyMigration(dexieData: MigrationData): Promise<boolean> {
// Verify account count
@@ -272,21 +286,21 @@ async function verifyMigration(dexieData: MigrationData): Promise<boolean> {
if (accountCount !== dexieData.accounts.length) {
return false;
}
// Verify settings count
const settingsResult = await db.exec('SELECT COUNT(*) as count FROM settings');
const settingsCount = settingsResult[0].values[0][0];
if (settingsCount !== dexieData.settings.length) {
return false;
}
// Verify contacts count
const contactsResult = await db.exec('SELECT COUNT(*) as count FROM contacts');
const contactsCount = contactsResult[0].values[0][0];
if (contactsCount !== dexieData.contacts.length) {
return false;
}
// Verify data integrity
for (const account of dexieData.accounts) {
const result = await db.exec(
@@ -294,12 +308,12 @@ async function verifyMigration(dexieData: MigrationData): Promise<boolean> {
[account.did]
);
const migratedAccount = result[0]?.values[0];
if (!migratedAccount ||
if (!migratedAccount ||
migratedAccount[1] !== account.publicKeyHex) { // public_key_hex is second column
return false;
}
}
return true;
}
```
@@ -307,18 +321,21 @@ async function verifyMigration(dexieData: MigrationData): Promise<boolean> {
## Performance Considerations
### 1. Indexing
- Dexie automatically creates indexes based on the schema
- absurd-sql requires explicit index creation
- Added indexes for frequently queried fields
- Use `PRAGMA journal_mode=MEMORY;` for better performance
### 2. Batch Operations
- Dexie has built-in bulk operations
- absurd-sql uses transactions for batch operations
- Consider chunking large datasets
- Use prepared statements for repeated queries
### 3. Query Optimization
- Dexie uses IndexedDB's native indexing
- absurd-sql requires explicit query optimization
- Use prepared statements for repeated queries
@@ -327,6 +344,7 @@ async function verifyMigration(dexieData: MigrationData): Promise<boolean> {
## Error Handling
### 1. Common Errors
```typescript
// Dexie errors
try {
@@ -351,6 +369,7 @@ try {
```
### 2. Transaction Recovery
```typescript
// Dexie transaction
try {
@@ -396,4 +415,4 @@ try {
- Remove Dexie database
- Clear IndexedDB storage
- Update application code
- Remove old dependencies
- Remove old dependencies

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# Migration Fence Definition: Dexie to SQLite
## Overview
This document defines the **migration fence** - the boundary between the legacy Dexie (IndexedDB) storage system and the new SQLite-based storage system in TimeSafari. The fence ensures controlled migration while maintaining data integrity and application stability.
## Current Migration Status
### ✅ Completed Components
- **SQLite Database Service**: Fully implemented with absurd-sql
- **Platform Service Layer**: Unified database interface across platforms
- **Migration Tools**: Data comparison and transfer utilities
- **Schema Migration**: Complete table structure migration
- **Data Export/Import**: Backup and restore functionality
### 🔄 Active Migration Components
- **Settings Migration**: Core user settings transferred
- **Account Migration**: Identity and key management
- **Contact Migration**: User contact data (via import interface)
### ❌ Legacy Components (Fence Boundary)
- **Dexie Database**: Legacy IndexedDB storage (disabled by default)
- **Dexie-Specific Code**: Direct database access patterns
- **Legacy Migration Paths**: Old data transfer methods
## Migration Fence Definition
### 1. Configuration Boundary
```typescript
// src/constants/app.ts
export const USE_DEXIE_DB = false; // FENCE: Controls legacy database access
```
**Fence Rule**: When `USE_DEXIE_DB = false`:
- All new data operations use SQLite
- Legacy Dexie database is not initialized
- Migration tools are the only path to legacy data
**Fence Rule**: When `USE_DEXIE_DB = true`:
- Legacy database is available for migration
- Dual-write operations may be enabled
- Migration tools can access both databases
### 2. Service Layer Boundary
```typescript
// src/services/PlatformServiceFactory.ts
export class PlatformServiceFactory {
public static getInstance(): PlatformService {
// FENCE: All database operations go through platform service
// No direct Dexie access outside migration tools
}
}
```
**Fence Rule**: All database operations must use:
- `PlatformService.dbQuery()` for read operations
- `PlatformService.dbExec()` for write operations
- No direct `db.` or `accountsDBPromise` access in application code
### 3. Data Access Patterns
#### ✅ Allowed (Inside Fence)
```typescript
// Use platform service for all database operations
const platformService = PlatformServiceFactory.getInstance();
const contacts = await platformService.dbQuery(
"SELECT * FROM contacts WHERE did = ?",
[accountDid]
);
```
#### ❌ Forbidden (Outside Fence)
```typescript
// Direct Dexie access (legacy pattern)
const contacts = await db.contacts.where('did').equals(accountDid).toArray();
// Direct database reference
const result = await accountsDBPromise;
```
### 4. Migration Tool Boundary
```typescript
// src/services/indexedDBMigrationService.ts
// FENCE: Only migration tools can access both databases
export async function compareDatabases(): Promise<DataComparison> {
// This is the ONLY place where both databases are accessed
}
```
**Fence Rule**: Migration tools are the exclusive interface between:
- Legacy Dexie database
- New SQLite database
- Data comparison and transfer operations
## Migration Fence Guidelines
### 1. Code Development Rules
#### New Feature Development
- **Always** use `PlatformService` for database operations
- **Never** import or reference Dexie directly
- **Always** test with `USE_DEXIE_DB = false`
#### Legacy Code Maintenance
- **Only** modify Dexie code for migration purposes
- **Always** add migration tests for schema changes
- **Never** add new Dexie-specific features
### 2. Data Integrity Rules
#### Migration Safety
- **Always** create backups before migration
- **Always** verify data integrity after migration
- **Never** delete legacy data until verified
#### Rollback Strategy
- **Always** maintain ability to rollback to Dexie
- **Always** preserve migration logs
- **Never** assume migration is irreversible
### 3. Testing Requirements
#### Migration Testing
```typescript
// Required test pattern for migration
describe('Database Migration', () => {
it('should migrate data without loss', async () => {
// 1. Enable Dexie
// 2. Create test data
// 3. Run migration
// 4. Verify data integrity
// 5. Disable Dexie
});
});
```
#### Application Testing
```typescript
// Required test pattern for application features
describe('Feature with Database', () => {
it('should work with SQLite only', async () => {
// Test with USE_DEXIE_DB = false
// Verify all operations use PlatformService
});
});
```
## Migration Fence Enforcement
### 1. Static Analysis
#### ESLint Rules
```json
{
"rules": {
"no-restricted-imports": [
"error",
{
"patterns": [
{
"group": ["../db/index"],
"message": "Use PlatformService instead of direct Dexie access"
}
]
}
]
}
}
```
#### TypeScript Rules
```json
{
"compilerOptions": {
"strict": true,
"noImplicitAny": true
}
}
```
### 2. Runtime Checks
#### Development Mode Validation
```typescript
// Development-only fence validation
if (import.meta.env.DEV && USE_DEXIE_DB) {
console.warn('⚠️ Dexie is enabled - migration mode active');
}
```
#### Production Safety
```typescript
// Production fence enforcement
if (import.meta.env.PROD && USE_DEXIE_DB) {
throw new Error('Dexie cannot be enabled in production');
}
```
## Migration Fence Timeline
### Phase 1: Fence Establishment ✅
- [x] Define migration fence boundaries
- [x] Implement PlatformService layer
- [x] Create migration tools
- [x] Set `USE_DEXIE_DB = false` by default
### Phase 2: Data Migration 🔄
- [x] Migrate core settings
- [x] Migrate account data
- [ ] Complete contact migration
- [ ] Verify all data integrity
### Phase 3: Code Cleanup 📋
- [ ] Remove unused Dexie imports
- [ ] Clean up legacy database code
- [ ] Update all documentation
- [ ] Remove migration tools
### Phase 4: Fence Removal 🎯
- [ ] Remove `USE_DEXIE_DB` constant
- [ ] Remove Dexie dependencies
- [ ] Remove migration service
- [ ] Finalize SQLite-only architecture
## Security Considerations
### 1. Data Protection
- **Encryption**: Maintain encryption standards across migration
- **Access Control**: Preserve user privacy during migration
- **Audit Trail**: Log all migration operations
### 2. Error Handling
- **Graceful Degradation**: Handle migration failures gracefully
- **User Communication**: Clear messaging about migration status
- **Recovery Options**: Provide rollback mechanisms
## Performance Considerations
### 1. Migration Performance
- **Batch Operations**: Use transactions for bulk data transfer
- **Progress Indicators**: Show migration progress to users
- **Background Processing**: Non-blocking migration operations
### 2. Application Performance
- **Query Optimization**: Optimize SQLite queries for performance
- **Indexing Strategy**: Maintain proper database indexes
- **Memory Management**: Efficient memory usage during migration
## Documentation Requirements
### 1. Code Documentation
- **Migration Fence Comments**: Document fence boundaries in code
- **API Documentation**: Update all database API documentation
- **Migration Guides**: Comprehensive migration documentation
### 2. User Documentation
- **Migration Instructions**: Clear user migration steps
- **Troubleshooting**: Common migration issues and solutions
- **Rollback Instructions**: How to revert if needed
## Conclusion
The migration fence provides a controlled boundary between legacy and new database systems, ensuring:
- **Data Integrity**: No data loss during migration
- **Application Stability**: Consistent behavior across platforms
- **Development Clarity**: Clear guidelines for code development
- **Migration Safety**: Controlled and reversible migration process
This fence will remain in place until all data is successfully migrated and verified, at which point the legacy system can be safely removed.

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# Database Migration Security Audit Checklist
## Overview
This document provides a comprehensive security audit checklist for the Dexie to SQLite migration in TimeSafari. The checklist ensures that data protection, privacy, and security are maintained throughout the migration process.
## Pre-Migration Security Assessment
### 1. Data Classification and Sensitivity
- [ ] **Data Inventory**
- [ ] Identify all sensitive data types (DIDs, private keys, personal information)
- [ ] Document data retention requirements
- [ ] Map data relationships and dependencies
- [ ] Assess data sensitivity levels (public, internal, confidential, restricted)
- [ ] **Encryption Assessment**
- [ ] Verify current encryption methods for sensitive data
- [ ] Document encryption keys and their management
- [ ] Assess encryption strength and compliance
- [ ] Plan encryption migration strategy
### 2. Access Control Review
- [ ] **User Access Rights**
- [ ] Audit current user permissions and roles
- [ ] Document access control mechanisms
- [ ] Verify principle of least privilege
- [ ] Plan access control migration
- [ ] **System Access**
- [ ] Review database access patterns
- [ ] Document authentication mechanisms
- [ ] Assess session management
- [ ] Plan authentication migration
### 3. Compliance Requirements
- [ ] **Regulatory Compliance**
- [ ] Identify applicable regulations (GDPR, CCPA, etc.)
- [ ] Document data processing requirements
- [ ] Assess privacy impact
- [ ] Plan compliance verification
- [ ] **Industry Standards**
- [ ] Review security standards compliance
- [ ] Document security controls
- [ ] Assess audit requirements
- [ ] Plan standards compliance
## Migration Security Controls
### 1. Data Protection During Migration
- [ ] **Encryption in Transit**
- [ ] Verify all data transfers are encrypted
- [ ] Use secure communication protocols (TLS 1.3+)
- [ ] Implement secure API endpoints
- [ ] Monitor encryption status
- [ ] **Encryption at Rest**
- [ ] Maintain encryption for stored data
- [ ] Verify encryption key management
- [ ] Test encryption/decryption processes
- [ ] Document encryption procedures
### 2. Access Control During Migration
- [ ] **Authentication**
- [ ] Maintain user authentication during migration
- [ ] Verify session management
- [ ] Implement secure token handling
- [ ] Monitor authentication events
- [ ] **Authorization**
- [ ] Preserve user permissions during migration
- [ ] Verify role-based access control
- [ ] Implement audit logging
- [ ] Monitor access patterns
### 3. Data Integrity
- [ ] **Data Validation**
- [ ] Implement input validation for all data
- [ ] Verify data format consistency
- [ ] Test data transformation processes
- [ ] Document validation rules
- [ ] **Data Verification**
- [ ] Implement checksums for data integrity
- [ ] Verify data completeness after migration
- [ ] Test data consistency checks
- [ ] Document verification procedures
## Migration Process Security
### 1. Backup Security
- [ ] **Backup Creation**
- [ ] Create encrypted backups before migration
- [ ] Verify backup integrity
- [ ] Store backups securely
- [ ] Test backup restoration
- [ ] **Backup Access**
- [ ] Limit backup access to authorized personnel
- [ ] Implement backup access logging
- [ ] Verify backup encryption
- [ ] Document backup procedures
### 2. Migration Tool Security
- [ ] **Tool Authentication**
- [ ] Implement secure authentication for migration tools
- [ ] Verify tool access controls
- [ ] Monitor tool usage
- [ ] Document tool security
- [ ] **Tool Validation**
- [ ] Verify migration tool integrity
- [ ] Test tool security features
- [ ] Validate tool outputs
- [ ] Document tool validation
### 3. Error Handling
- [ ] **Error Security**
- [ ] Implement secure error handling
- [ ] Avoid information disclosure in errors
- [ ] Log security-relevant errors
- [ ] Document error procedures
- [ ] **Recovery Security**
- [ ] Implement secure recovery procedures
- [ ] Verify recovery data protection
- [ ] Test recovery processes
- [ ] Document recovery security
## Post-Migration Security
### 1. Data Verification
- [ ] **Data Completeness**
- [ ] Verify all data was migrated successfully
- [ ] Check for data corruption
- [ ] Validate data relationships
- [ ] Document verification results
- [ ] **Data Accuracy**
- [ ] Verify data accuracy after migration
- [ ] Test data consistency
- [ ] Validate data integrity
- [ ] Document accuracy checks
### 2. Access Control Verification
- [ ] **User Access**
- [ ] Verify user access rights after migration
- [ ] Test authentication mechanisms
- [ ] Validate authorization rules
- [ ] Document access verification
- [ ] **System Access**
- [ ] Verify system access controls
- [ ] Test API security
- [ ] Validate session management
- [ ] Document system security
### 3. Security Testing
- [ ] **Penetration Testing**
- [ ] Conduct security penetration testing
- [ ] Test for common vulnerabilities
- [ ] Verify security controls
- [ ] Document test results
- [ ] **Vulnerability Assessment**
- [ ] Scan for security vulnerabilities
- [ ] Assess security posture
- [ ] Identify security gaps
- [ ] Document assessment results
## Monitoring and Logging
### 1. Security Monitoring
- [ ] **Access Monitoring**
- [ ] Monitor database access patterns
- [ ] Track user authentication events
- [ ] Monitor system access
- [ ] Document monitoring procedures
- [ ] **Data Monitoring**
- [ ] Monitor data access patterns
- [ ] Track data modification events
- [ ] Monitor data integrity
- [ ] Document data monitoring
### 2. Security Logging
- [ ] **Audit Logging**
- [ ] Implement comprehensive audit logging
- [ ] Log all security-relevant events
- [ ] Secure log storage and access
- [ ] Document logging procedures
- [ ] **Log Analysis**
- [ ] Implement log analysis tools
- [ ] Monitor for security incidents
- [ ] Analyze security trends
- [ ] Document analysis procedures
## Incident Response
### 1. Security Incident Planning
- [ ] **Incident Response Plan**
- [ ] Develop security incident response plan
- [ ] Define incident response procedures
- [ ] Train incident response team
- [ ] Document response procedures
- [ ] **Incident Detection**
- [ ] Implement incident detection mechanisms
- [ ] Monitor for security incidents
- [ ] Establish incident reporting procedures
- [ ] Document detection procedures
### 2. Recovery Procedures
- [ ] **Data Recovery**
- [ ] Develop data recovery procedures
- [ ] Test recovery processes
- [ ] Verify recovery data integrity
- [ ] Document recovery procedures
- [ ] **System Recovery**
- [ ] Develop system recovery procedures
- [ ] Test system recovery
- [ ] Verify system security after recovery
- [ ] Document recovery procedures
## Compliance Verification
### 1. Regulatory Compliance
- [ ] **Privacy Compliance**
- [ ] Verify GDPR compliance
- [ ] Check CCPA compliance
- [ ] Assess other privacy regulations
- [ ] Document compliance status
- [ ] **Security Compliance**
- [ ] Verify security standard compliance
- [ ] Check industry requirements
- [ ] Assess security certifications
- [ ] Document compliance status
### 2. Audit Requirements
- [ ] **Audit Trail**
- [ ] Maintain comprehensive audit trail
- [ ] Verify audit log integrity
- [ ] Test audit log accessibility
- [ ] Document audit procedures
- [ ] **Audit Reporting**
- [ ] Generate audit reports
- [ ] Verify report accuracy
- [ ] Distribute reports securely
- [ ] Document reporting procedures
## Documentation and Training
### 1. Security Documentation
- [ ] **Security Procedures**
- [ ] Document security procedures
- [ ] Update security policies
- [ ] Create security guidelines
- [ ] Maintain documentation
- [ ] **Security Training**
- [ ] Develop security training materials
- [ ] Train staff on security procedures
- [ ] Verify training effectiveness
- [ ] Document training procedures
### 2. Ongoing Security
- [ ] **Security Maintenance**
- [ ] Establish security maintenance procedures
- [ ] Schedule security updates
- [ ] Monitor security trends
- [ ] Document maintenance procedures
- [ ] **Security Review**
- [ ] Conduct regular security reviews
- [ ] Update security controls
- [ ] Assess security effectiveness
- [ ] Document review procedures
## Risk Assessment
### 1. Risk Identification
- [ ] **Security Risks**
- [ ] Identify potential security risks
- [ ] Assess risk likelihood and impact
- [ ] Prioritize security risks
- [ ] Document risk assessment
- [ ] **Mitigation Strategies**
- [ ] Develop risk mitigation strategies
- [ ] Implement risk controls
- [ ] Monitor risk status
- [ ] Document mitigation procedures
### 2. Risk Monitoring
- [ ] **Risk Tracking**
- [ ] Track identified risks
- [ ] Monitor risk status
- [ ] Update risk assessments
- [ ] Document risk tracking
- [ ] **Risk Reporting**
- [ ] Generate risk reports
- [ ] Distribute risk information
- [ ] Update risk documentation
- [ ] Document reporting procedures
## Conclusion
This security audit checklist ensures that the database migration maintains the highest standards of data protection, privacy, and security. Regular review and updates of this checklist are essential to maintain security throughout the migration process and beyond.
### Security Checklist Summary
- [ ] **Pre-Migration Assessment**: Complete
- [ ] **Migration Controls**: Complete
- [ ] **Process Security**: Complete
- [ ] **Post-Migration Verification**: Complete
- [ ] **Monitoring and Logging**: Complete
- [ ] **Incident Response**: Complete
- [ ] **Compliance Verification**: Complete
- [ ] **Documentation and Training**: Complete
- [ ] **Risk Assessment**: Complete
**Overall Security Status**: [ ] Secure [ ] Needs Attention [ ] Critical Issues
**Next Review Date**: _______________
**Reviewed By**: _______________
**Approved By**: _______________

733
doc/migration-to-wa-sqlite.md
View File

@@ -4,610 +4,223 @@
This document outlines the migration process from Dexie.js to absurd-sql for the TimeSafari app's storage implementation. The migration aims to provide a consistent SQLite-based storage solution across all platforms while maintaining data integrity and ensuring a smooth transition for users.
**Current Status**: The migration is in **Phase 2** with a well-defined migration fence in place. Core settings and account data have been migrated, with contact migration in progress. **ActiveDid migration has been implemented** to ensure user identity continuity.
## Migration Goals
1. **Data Integrity**
- Preserve all existing data
- Maintain data relationships
- Ensure data consistency
- **Preserve user's active identity**
2. **Performance**
- Improve query performance
- Reduce storage overhead
- Optimize for platform-specific features
- Optimize for platform-specific capabilities
3. **Security**
- Maintain or improve encryption
- Preserve access controls
- Enhance data protection
3. **User Experience**
- Seamless transition with no data loss
- Maintain user's active identity and preferences
- Preserve application state
4. **User Experience**
- Zero data loss
- Minimal downtime
- Automatic migration where possible
## Migration Architecture
## Prerequisites
### Migration Fence
The migration fence is defined by the `USE_DEXIE_DB` constant in `src/constants/app.ts`:
- `USE_DEXIE_DB = false` (default): Uses SQLite database
- `USE_DEXIE_DB = true`: Uses Dexie database (for migration purposes)
1. **Backup Requirements**
```typescript
interface MigrationBackup {
timestamp: number;
accounts: Account[];
settings: Setting[];
contacts: Contact[];
metadata: {
version: string;
platform: string;
dexieVersion: string;
};
}
```
### Migration Order
The migration follows a specific order to maintain data integrity:
2. **Dependencies**
```json
{
"@jlongster/sql.js": "^1.8.0",
"absurd-sql": "^1.8.0"
}
```
1. **Accounts** (foundational - contains DIDs)
2. **Settings** (references accountDid, activeDid)
3. **ActiveDid** (depends on accounts and settings) ⭐ **NEW**
4. **Contacts** (independent, but migrated after accounts for consistency)
3. **Storage Requirements**
- Sufficient IndexedDB quota
- Available disk space for SQLite
- Backup storage space
## ActiveDid Migration ⭐ **NEW FEATURE**
4. **Platform Support**
- Web: Modern browser with IndexedDB support
- iOS: iOS 13+ with SQLite support
- Android: Android 5+ with SQLite support
- Electron: Latest version with SQLite support
### Problem Solved
Previously, the `activeDid` setting was not migrated from Dexie to SQLite, causing users to lose their active identity after migration.
### Solution Implemented
The migration now includes a dedicated step for migrating the `activeDid`:
1. **Detection**: Identifies the `activeDid` from Dexie master settings
2. **Validation**: Verifies the `activeDid` exists in SQLite accounts
3. **Migration**: Updates SQLite master settings with the `activeDid`
4. **Error Handling**: Graceful handling of missing accounts
### Implementation Details
#### New Function: `migrateActiveDid()`
```typescript
export async function migrateActiveDid(): Promise<MigrationResult> {
// 1. Get Dexie settings to find the activeDid
const dexieSettings = await getDexieSettings();
const masterSettings = dexieSettings.find(setting => !setting.accountDid);
// 2. Verify the activeDid exists in SQLite accounts
const accountExists = await platformService.dbQuery(
"SELECT did FROM accounts WHERE did = ?",
[dexieActiveDid],
);
// 3. Update SQLite master settings
await updateDefaultSettings({ activeDid: dexieActiveDid });
}
```
#### Enhanced `migrateSettings()` Function
The settings migration now includes activeDid handling:
- Extracts `activeDid` from Dexie master settings
- Validates account existence in SQLite
- Updates SQLite master settings with the `activeDid`
#### Updated `migrateAll()` Function
The complete migration now includes a dedicated step for activeDid:
```typescript
// Step 3: Migrate ActiveDid (depends on accounts and settings)
logger.info("[MigrationService] Step 3: Migrating activeDid...");
const activeDidResult = await migrateActiveDid();
```
### Benefits
- ✅ **User Identity Preservation**: Users maintain their active identity
- ✅ **Seamless Experience**: No need to manually select identity after migration
- ✅ **Data Consistency**: Ensures all identity-related settings are preserved
- ✅ **Error Resilience**: Graceful handling of edge cases
## Migration Process
### 1. Preparation
### Phase 1: Preparation ✅
- [x] Enable Dexie database access
- [x] Implement data comparison tools
- [x] Create migration service structure
### Phase 2: Core Migration ✅
- [x] Account migration with `importFromMnemonic`
- [x] Settings migration (excluding activeDid)
- [x] **ActiveDid migration** ⭐ **COMPLETED**
- [x] Contact migration framework
### Phase 3: Validation and Cleanup 🔄
- [ ] Comprehensive data validation
- [ ] Performance testing
- [ ] User acceptance testing
- [ ] Dexie removal
## Usage
### Manual Migration
```typescript
// src/services/storage/migration/MigrationService.ts
import initSqlJs from '@jlongster/sql.js';
import { SQLiteFS } from 'absurd-sql';
import IndexedDBBackend from 'absurd-sql/dist/indexeddb-backend';
import { migrateAll, migrateActiveDid } from '../services/indexedDBMigrationService';
export class MigrationService {
private static instance: MigrationService;
private backup: MigrationBackup | null = null;
private sql: any = null;
private db: any = null;
// Complete migration
const result = await migrateAll();
async prepare(): Promise<void> {
try {
// 1. Check prerequisites
await this.checkPrerequisites();
// 2. Create backup
this.backup = await this.createBackup();
// 3. Verify backup integrity
await this.verifyBackup();
// 4. Initialize absurd-sql
await this.initializeAbsurdSql();
} catch (error) {
throw new StorageError(
'Migration preparation failed',
StorageErrorCodes.MIGRATION_FAILED,
error
);
}
}
private async initializeAbsurdSql(): Promise<void> {
// Initialize SQL.js
this.sql = await initSqlJs({
locateFile: (file: string) => {
return new URL(`/node_modules/@jlongster/sql.js/dist/${file}`, import.meta.url).href;
}
});
// Setup SQLiteFS with IndexedDB backend
const sqlFS = new SQLiteFS(this.sql.FS, new IndexedDBBackend());
this.sql.register_for_idb(sqlFS);
// Create and mount filesystem
this.sql.FS.mkdir('/sql');
this.sql.FS.mount(sqlFS, {}, '/sql');
// Open database
const path = '/sql/db.sqlite';
if (typeof SharedArrayBuffer === 'undefined') {
let stream = this.sql.FS.open(path, 'a+');
await stream.node.contents.readIfFallback();
this.sql.FS.close(stream);
}
this.db = new this.sql.Database(path, { filename: true });
if (!this.db) {
throw new StorageError(
'Database initialization failed',
StorageErrorCodes.INITIALIZATION_FAILED
);
}
// Configure database
await this.db.exec(`PRAGMA journal_mode=MEMORY;`);
}
private async checkPrerequisites(): Promise<void> {
// Check IndexedDB availability
if (!window.indexedDB) {
throw new StorageError(
'IndexedDB not available',
StorageErrorCodes.INITIALIZATION_FAILED
);
}
// Check storage quota
const quota = await navigator.storage.estimate();
if (quota.quota && quota.usage && quota.usage > quota.quota * 0.9) {
throw new StorageError(
'Insufficient storage space',
StorageErrorCodes.STORAGE_FULL
);
}
// Check platform support
const capabilities = await PlatformDetection.getCapabilities();
if (!capabilities.hasFileSystem) {
throw new StorageError(
'Platform does not support required features',
StorageErrorCodes.INITIALIZATION_FAILED
);
}
}
private async createBackup(): Promise<MigrationBackup> {
const dexieDB = new Dexie('TimeSafariDB');
return {
timestamp: Date.now(),
accounts: await dexieDB.accounts.toArray(),
settings: await dexieDB.settings.toArray(),
contacts: await dexieDB.contacts.toArray(),
metadata: {
version: '1.0.0',
platform: await PlatformDetection.getPlatform(),
dexieVersion: Dexie.version
}
};
}
}
// Or migrate just the activeDid
const activeDidResult = await migrateActiveDid();
```
### 2. Data Migration
### Migration Verification
```typescript
// src/services/storage/migration/DataMigration.ts
export class DataMigration {
async migrate(backup: MigrationBackup): Promise<void> {
try {
// 1. Create new database schema
await this.createSchema();
// 2. Migrate accounts
await this.migrateAccounts(backup.accounts);
// 3. Migrate settings
await this.migrateSettings(backup.settings);
// 4. Migrate contacts
await this.migrateContacts(backup.contacts);
// 5. Verify migration
await this.verifyMigration(backup);
} catch (error) {
// 6. Handle failure
await this.handleMigrationFailure(error, backup);
}
}
import { compareDatabases } from '../services/indexedDBMigrationService';
private async migrateAccounts(accounts: Account[]): Promise<void> {
// Use transaction for atomicity
await this.db.exec('BEGIN TRANSACTION;');
try {
for (const account of accounts) {
await this.db.run(`
INSERT INTO accounts (did, public_key_hex, created_at, updated_at)
VALUES (?, ?, ?, ?)
`, [
account.did,
account.publicKeyHex,
account.createdAt,
account.updatedAt
]);
}
await this.db.exec('COMMIT;');
} catch (error) {
await this.db.exec('ROLLBACK;');
throw error;
}
}
private async verifyMigration(backup: MigrationBackup): Promise<void> {
// Verify account count
const result = await this.db.exec('SELECT COUNT(*) as count FROM accounts');
const accountCount = result[0].values[0][0];
if (accountCount !== backup.accounts.length) {
throw new StorageError(
'Account count mismatch',
StorageErrorCodes.VERIFICATION_FAILED
);
}
// Verify data integrity
await this.verifyDataIntegrity(backup);
}
}
const comparison = await compareDatabases();
console.log('Migration differences:', comparison.differences);
```
### 3. Rollback Strategy
## Error Handling
### ActiveDid Migration Errors
- **Missing Account**: If the `activeDid` from Dexie doesn't exist in SQLite accounts
- **Database Errors**: Connection or query failures
- **Settings Update Failures**: Issues updating SQLite master settings
### Recovery Strategies
1. **Automatic Recovery**: Migration continues even if activeDid migration fails
2. **Manual Recovery**: Users can manually select their identity after migration
3. **Fallback**: System creates new identity if none exists
## Security Considerations
### Data Protection
- All sensitive data (mnemonics, private keys) are encrypted
- Migration preserves encryption standards
- No plaintext data exposure during migration
### Identity Verification
- ActiveDid migration validates account existence
- Prevents setting non-existent identities as active
- Maintains cryptographic integrity
## Testing
### Migration Testing
```bash
# Enable Dexie for testing
# Set USE_DEXIE_DB = true in constants/app.ts
# Run migration
npm run migrate
# Verify results
npm run test:migration
```
### ActiveDid Testing
```typescript
// src/services/storage/migration/RollbackService.ts
export class RollbackService {
async rollback(backup: MigrationBackup): Promise<void> {
try {
// 1. Stop all database operations
await this.stopDatabaseOperations();
// 2. Restore from backup
await this.restoreFromBackup(backup);
// 3. Verify restoration
await this.verifyRestoration(backup);
// 4. Clean up absurd-sql
await this.cleanupAbsurdSql();
} catch (error) {
throw new StorageError(
'Rollback failed',
StorageErrorCodes.ROLLBACK_FAILED,
error
);
}
}
private async restoreFromBackup(backup: MigrationBackup): Promise<void> {
const dexieDB = new Dexie('TimeSafariDB');
// Restore accounts
await dexieDB.accounts.bulkPut(backup.accounts);
// Restore settings
await dexieDB.settings.bulkPut(backup.settings);
// Restore contacts
await dexieDB.contacts.bulkPut(backup.contacts);
}
}
// Test activeDid migration specifically
const result = await migrateActiveDid();
expect(result.success).toBe(true);
expect(result.warnings).toContain('Successfully migrated activeDid');
```
## Migration UI
## Troubleshooting
```vue
<!-- src/components/MigrationProgress.vue -->
<template>
<div class="migration-progress">
<h2>Database Migration</h2>
<div class="progress-container">
<div class="progress-bar" :style="{ width: `${progress}%` }" />
<div class="progress-text">{{ progress }}%</div>
</div>
<div class="status-message">{{ statusMessage }}</div>
<div v-if="error" class="error-message">
{{ error }}
<button @click="retryMigration">Retry</button>
</div>
</div>
</template>
### Common Issues
<script setup lang="ts">
import { ref, onMounted } from 'vue';
import { MigrationService } from '@/services/storage/migration/MigrationService';
1. **ActiveDid Not Found**
- Ensure accounts were migrated before activeDid migration
- Check that the Dexie activeDid exists in SQLite accounts
const progress = ref(0);
const statusMessage = ref('Preparing migration...');
const error = ref<string | null>(null);
2. **Migration Failures**
- Verify Dexie database is accessible
- Check SQLite database permissions
- Review migration logs for specific errors
const migrationService = MigrationService.getInstance();
3. **Data Inconsistencies**
- Use `compareDatabases()` to identify differences
- Re-run migration if necessary
- Check for duplicate or conflicting records
async function startMigration() {
try {
// 1. Preparation
statusMessage.value = 'Creating backup...';
await migrationService.prepare();
progress.value = 20;
// 2. Data migration
statusMessage.value = 'Migrating data...';
await migrationService.migrate();
progress.value = 80;
// 3. Verification
statusMessage.value = 'Verifying migration...';
await migrationService.verify();
progress.value = 100;
statusMessage.value = 'Migration completed successfully!';
} catch (err) {
error.value = err instanceof Error ? err.message : 'Migration failed';
statusMessage.value = 'Migration failed';
}
}
### Debugging
```typescript
// Enable detailed logging
logger.setLevel('debug');
async function retryMigration() {
error.value = null;
progress.value = 0;
await startMigration();
}
onMounted(() => {
startMigration();
});
</script>
<style scoped>
.migration-progress {
padding: 2rem;
max-width: 600px;
margin: 0 auto;
}
.progress-container {
position: relative;
height: 20px;
background: #eee;
border-radius: 10px;
overflow: hidden;
margin: 1rem 0;
}
.progress-bar {
position: absolute;
height: 100%;
background: #4CAF50;
transition: width 0.3s ease;
}
.progress-text {
position: absolute;
width: 100%;
text-align: center;
line-height: 20px;
color: #000;
}
.status-message {
text-align: center;
margin: 1rem 0;
}
.error-message {
color: #f44336;
text-align: center;
margin: 1rem 0;
}
button {
margin-top: 1rem;
padding: 0.5rem 1rem;
background: #2196F3;
color: white;
border: none;
border-radius: 4px;
cursor: pointer;
}
button:hover {
background: #1976D2;
}
</style>
// Check migration status
const comparison = await compareDatabases();
console.log('Settings differences:', comparison.differences.settings);
```
## Testing Strategy
## Future Enhancements
1. **Unit Tests**
```typescript
// src/services/storage/migration/__tests__/MigrationService.spec.ts
describe('MigrationService', () => {
it('should initialize absurd-sql correctly', async () => {
const service = MigrationService.getInstance();
await service.initializeAbsurdSql();
expect(service.isInitialized()).toBe(true);
expect(service.getDatabase()).toBeDefined();
});
### Planned Improvements
1. **Batch Processing**: Optimize for large datasets
2. **Incremental Migration**: Support partial migrations
3. **Rollback Capability**: Ability to revert migration
4. **Progress Tracking**: Real-time migration progress
it('should create valid backup', async () => {
const service = MigrationService.getInstance();
const backup = await service.createBackup();
expect(backup).toBeDefined();
expect(backup.accounts).toBeInstanceOf(Array);
expect(backup.settings).toBeInstanceOf(Array);
expect(backup.contacts).toBeInstanceOf(Array);
});
### Performance Optimizations
1. **Parallel Processing**: Migrate independent data concurrently
2. **Memory Management**: Optimize for large datasets
3. **Transaction Batching**: Reduce database round trips
it('should migrate data correctly', async () => {
const service = MigrationService.getInstance();
const backup = await service.createBackup();
await service.migrate(backup);
// Verify migration
const accounts = await service.getMigratedAccounts();
expect(accounts).toHaveLength(backup.accounts.length);
});
## Conclusion
it('should handle rollback correctly', async () => {
const service = MigrationService.getInstance();
const backup = await service.createBackup();
// Simulate failed migration
await service.migrate(backup);
await service.simulateFailure();
// Perform rollback
await service.rollback(backup);
// Verify rollback
const accounts = await service.getOriginalAccounts();
expect(accounts).toHaveLength(backup.accounts.length);
});
});
```
The Dexie to SQLite migration provides a robust, secure, and user-friendly transition path. The addition of activeDid migration ensures that users maintain their identity continuity throughout the migration process, significantly improving the user experience.
2. **Integration Tests**
```typescript
// src/services/storage/migration/__tests__/integration/Migration.spec.ts
describe('Migration Integration', () => {
it('should handle concurrent access during migration', async () => {
const service = MigrationService.getInstance();
// Start migration
const migrationPromise = service.migrate();
// Simulate concurrent access
const accessPromises = Array(5).fill(null).map(() =>
service.getAccount('did:test:123')
);
// Wait for all operations
const [migrationResult, ...accessResults] = await Promise.allSettled([
migrationPromise,
...accessPromises
]);
// Verify results
expect(migrationResult.status).toBe('fulfilled');
expect(accessResults.some(r => r.status === 'rejected')).toBe(true);
});
it('should maintain data integrity during platform transition', async () => {
const service = MigrationService.getInstance();
// Simulate platform change
await service.simulatePlatformChange();
// Verify data
const accounts = await service.getAllAccounts();
const settings = await service.getAllSettings();
const contacts = await service.getAllContacts();
expect(accounts).toBeDefined();
expect(settings).toBeDefined();
expect(contacts).toBeDefined();
});
});
```
## Success Criteria
1. **Data Integrity**
- [ ] All accounts migrated successfully
- [ ] All settings preserved
- [ ] All contacts transferred
- [ ] No data corruption
2. **Performance**
- [ ] Migration completes within acceptable time
- [ ] No significant performance degradation
- [ ] Efficient storage usage
- [ ] Smooth user experience
3. **Security**
- [ ] Encrypted data remains secure
- [ ] Access controls maintained
- [ ] No sensitive data exposure
- [ ] Secure backup process
4. **User Experience**
- [ ] Clear migration progress
- [ ] Informative error messages
- [ ] Automatic recovery from failures
- [ ] No data loss
## Rollback Plan
1. **Automatic Rollback**
- Triggered by migration failure
- Restores from verified backup
- Maintains data consistency
- Logs rollback reason
2. **Manual Rollback**
- Available through settings
- Requires user confirmation
- Preserves backup data
- Provides rollback status
3. **Emergency Recovery**
- Manual backup restoration
- Database repair tools
- Data recovery procedures
- Support contact information
## Post-Migration
1. **Verification**
- Data integrity checks
- Performance monitoring
- Error rate tracking
- User feedback collection
2. **Cleanup**
- Remove old database
- Clear migration artifacts
- Update application state
- Archive backup data
3. **Monitoring**
- Track migration success rate
- Monitor performance metrics
- Collect error reports
- Gather user feedback
## Support
For assistance with migration:
1. Check the troubleshooting guide
2. Review error logs
3. Contact support team
4. Submit issue report
## Timeline
1. **Preparation Phase** (1 week)
- Backup system implementation
- Migration service development
- Testing framework setup
2. **Testing Phase** (2 weeks)
- Unit testing
- Integration testing
- Performance testing
- Security testing
3. **Deployment Phase** (1 week)
- Staged rollout
- Monitoring
- Support preparation
- Documentation updates
4. **Post-Deployment** (2 weeks)
- Monitoring
- Bug fixes
- Performance optimization
- User feedback collection
The migration fence architecture allows for controlled, reversible migration while maintaining application stability and data integrity.