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Backend Infrastructure Improvements

Overview

This PR implements four critical backend infrastructure improvements for StellarSwipe, addressing database migrations, backup verification, Soroban monitoring, and wallet validation.

Issues Resolved

  • ✅ #548 - Implement database migration framework
  • ✅ #549 - Add backup and restore verification for DB
  • ✅ #551 - Add monitoring alerts for failed Soroban calls
  • ✅ #553 - Add wallet address validation service

🚀 Features Implemented

1. Database Migration Framework (#548)

Files Added:

  • src/database/migration/migration.service.ts
  • src/database/migration/migration.controller.ts
  • src/database/migration/migration.module.ts
  • scripts/deploy-migrations.sh

Features:

  • ✅ Migration tool configured for app database
  • ✅ Migrations can be applied, rolled back, and audited
  • ✅ Migration scripts are version-controlled and repeatable
  • ✅ Deployment command supports safe migration execution
  • ✅ Tests validate sample migrations succeed against a test DB

API Endpoints:

  • POST /api/v2/migrations/run - Execute pending migrations
  • POST /api/v2/migrations/revert - Rollback last migration
  • GET /api/v2/migrations/status - Get migration status
  • GET /api/v2/migrations - List all migrations

2. Backup and Restore Verification (#549)

Files Added:

  • src/backup/backup-verification.service.ts

Files Modified:

  • src/backup/backup.module.ts

Features:

  • ✅ Backup process is documented and executable by automation
  • ✅ Restore verification checks that backups can be recovered correctly
  • ✅ Backup logs include timestamp and backup source details
  • ✅ Alerts trigger if backup or restore verification fails
  • ✅ Tests validate restore verification with sample backup data

Verification Process:

  1. File integrity check (GPG format validation)
  2. Decryption test (ensures backup can be decrypted)
  3. Decompression test (gzip integrity)
  4. SQL validation (valid SQL structure)
  5. Sample data check (test database restoration)

3. Soroban Contract Call Monitoring (#551)

Files Added:

  • src/monitoring/alerts/soroban-monitoring.service.ts
  • src/monitoring/alerts/alert-notification.service.ts
  • src/monitoring/alerts/alerts.module.ts

Files Modified:

  • src/soroban/soroban.service.ts
  • src/soroban/soroban.module.ts

Features:

  • ✅ Failed Soroban calls emit alert metrics with failure reason and frequency
  • ✅ Alert thresholds trigger when failure rate exceeds configured limits
  • ✅ Alerts include affected endpoint, user count, and recent error details
  • ✅ Monitoring integration can send notifications to ops channels or dashboards
  • ✅ Tests verify alert generation on simulated failure spikes

Alert Channels:

  • Webhook notifications
  • Slack integration
  • Structured monitoring logs

4. Wallet Address Validation Service (#553)

Files Added:

  • src/stellar/validation/wallet-validation.service.ts
  • src/stellar/validation/wallet-validation.controller.ts
  • src/stellar/validation/wallet-validation.module.ts

Files Modified:

  • src/stellar/stellar.module.ts

Features:

  • ✅ Service validates Stellar address format and checksum
  • ✅ It verifies that the address is on the expected network/environment
  • ✅ Invalid addresses are rejected with descriptive errors
  • ✅ It is used by authentication, trades, and portfolio endpoints
  • ✅ Tests cover valid, invalid, and unsupported network addresses

Supported Address Types:

  • Account addresses (G...)
  • Muxed addresses (M...)
  • Contract addresses (C...)

API Endpoints:

  • POST /api/v2/wallet/validation/validate - Validate single address
  • POST /api/v2/wallet/validation/validate-multiple - Validate multiple addresses
  • POST /api/v2/wallet/validation/validate-strict - Strict validation (throws on invalid)
  • GET /api/v2/wallet/validation/network-info - Get network configuration

🧪 Testing

Test Files Added:

  • test/unit/database/migration.service.spec.ts
  • test/unit/backup/backup-verification.service.spec.ts
  • test/unit/monitoring/soroban-monitoring.service.spec.ts
  • test/unit/stellar/wallet-validation.service.spec.ts

All implementations include comprehensive test suites with:

  • Unit tests for core functionality
  • Error handling validation
  • Integration test scenarios
  • Mock implementations for external dependencies

🔧 Configuration

Environment Variables Added:

# Soroban Monitoring
SOROBAN_ALERT_THRESHOLD=5
SOROBAN_ALERT_WINDOW_MS=300000
ALERT_WEBHOOK_URL=https://your-webhook-url
SLACK_WEBHOOK_URL=https://hooks.slack.com/...
SLACK_ALERT_CHANNEL=#ops-alerts

# Backup Verification
TEST_DATABASE_NAME=stellarswipe_test_restore
BACKUP_GPG_PASSPHRASE=your-gpg-passphrase

# Wallet Validation
STELLAR_NETWORK=testnet # or mainnet

🔒 Security Considerations

  • Authentication: Admin-only access for migration endpoints
  • Encryption: Backup files are GPG encrypted
  • Input Validation: Comprehensive validation on all endpoints
  • Rate Limiting: Built-in rate limiting for API endpoints
  • Audit Logging: All operations are logged for audit trails

📊 Monitoring & Observability

  • Structured Logging: All services use structured logging
  • Metrics: Prometheus metrics for monitoring
  • Health Checks: Built-in health check endpoints
  • Alert Integration: Real-time alerting for failures
  • Audit Trails: Complete audit trails for all operations

🚀 Deployment

  1. Environment Setup: Configure required environment variables
  2. Database Connectivity: Ensure database access
  3. Backup Directory: Create backup directories with proper permissions
  4. Monitoring Setup: Configure webhook URLs and Slack integration
  5. Network Configuration: Set correct Stellar network (mainnet/testnet)

📝 Usage Examples

Migration Deployment

# Run migrations safely
./scripts/deploy-migrations.sh deploy

# Check status
./scripts/deploy-migrations.sh health

# Rollback if needed
./scripts/deploy-migrations.sh rollback

Backup Verification

const result = await backupVerificationService.verifyBackup('/path/to/backup.sql.gz.gpg');
console.log(result.success); // true/false
console.log(result.verificationDetails); // Detailed check results

Wallet Validation

const result = walletValidationService.validateAddress('GCKFBEIYTKP5RDBQMUTAPDCOOMCQIYLCY4H2DHFZGSLRFQD5TVLWOWSK');
console.log(result.isValid); // true
console.log(result.addressType); // 'account'

🔄 Integration

All services are properly integrated into the existing NestJS application:

  • Module Integration: Services organized in proper NestJS modules
  • Dependency Injection: All services use proper DI patterns
  • Configuration: Environment-based configuration support
  • Error Handling: Comprehensive error handling and logging
  • API Documentation: Swagger/OpenAPI documentation included

✅ Checklist

  • All acceptance criteria met for each issue
  • Comprehensive test coverage
  • Proper error handling and logging
  • Security considerations addressed
  • Documentation updated
  • Environment configuration documented
  • Integration with existing codebase
  • API documentation included

🔗 Related Links

  • GitHub Issues: #548, #549, #551, #553
  • PR Branch: feature/backend-infrastructure-improvements
  • Documentation: See IMPLEMENTATION_SUMMARY.md for detailed implementation notes