diff --git a/docs/DISASTER_RECOVERY.md b/docs/DISASTER_RECOVERY.md new file mode 100644 index 0000000..8fe39d9 --- /dev/null +++ b/docs/DISASTER_RECOVERY.md @@ -0,0 +1,570 @@ +# PrivacyLayer Disaster Recovery Plan (DRP) + +**Version:** 1.0 +**Last Updated:** March 2026 +**Status:** Draft +**Owner:** PrivacyLayer Operations Team + +--- + +## Table of Contents + +1. [Executive Summary](#1-executive-summary) +2. [Risk Assessment](#2-risk-assessment) +3. [Recovery Objectives](#3-recovery-objectives) +4. [Backup Strategies](#4-backup-strategies) +5. [Recovery Procedures](#5-recovery-procedures) +6. [Communication Plan](#6-communication-plan) +7. [Testing Procedures](#7-testing-procedures) +8. [Appendices](#8-appendices) + +--- + +## 1. Executive Summary + +This Disaster Recovery Plan (DRP) outlines the procedures and protocols for recovering PrivacyLayer's critical systems and data in the event of a disaster or major incident. The plan ensures business continuity and minimizes downtime for users relying on privacy-preserving transactions on the Stellar network. + +### Scope + +This plan covers: +- Smart contract recovery +- Data backup and restoration +- Infrastructure failover +- Communication protocols +- Testing and maintenance + +### Key Contacts + +| Role | Contact | Responsibility | +|------|---------|----------------| +| Incident Commander | security@privacylayer.io | Overall recovery coordination | +| Technical Lead | dev@privacylayer.io | System recovery operations | +| Communications Lead | comms@privacylayer.io | User and stakeholder communications | +| Legal Counsel | legal@privacylayer.io | Regulatory compliance | + +--- + +## 2. Risk Assessment + +### 2.1 Threat Categories + +| Category | Threat | Likelihood | Impact | Risk Level | +|----------|--------|------------|--------|------------| +| **Technical** | Smart contract exploit | Low | Critical | High | +| **Technical** | Key compromise | Medium | Critical | High | +| **Technical** | Infrastructure failure | Medium | High | Medium | +| **Technical** | Network congestion | High | Medium | Medium | +| **Operational** | Human error | Medium | Medium | Medium | +| **Operational** | Process failure | Low | Medium | Low | +| **External** | Regulatory action | Low | High | Medium | +| **External** | Third-party failure | Medium | Medium | Medium | +| **Natural** | Data center disaster | Very Low | Critical | Medium | + +### 2.2 Critical Assets + +| Asset | Type | Criticality | Recovery Priority | +|-------|------|-------------|-------------------| +| Pool Contract | Smart Contract | Critical | P1 | +| Verifier Contract | Smart Contract | Critical | P1 | +| Governance Keys | Cryptographic | Critical | P1 | +| Merkle Tree State | Data | Critical | P1 | +| User Notes | User Data | High | P2 | +| SDK/CLI | Software | Medium | P3 | +| Documentation | Content | Low | P4 | + +### 2.3 Single Points of Failure + +| Component | SPOF | Mitigation | +|-----------|------|------------| +| Governance Multi-sig | No (4/7) | Adequate redundancy | +| Contract Upgrade Key | No (time-locked) | Time delay for review | +| DNS/Website | Yes | Cloudflare failover | +| Documentation Host | Yes | GitHub mirror | +| RPC Nodes | No (multiple providers) | Load balancing | + +--- + +## 3. Recovery Objectives + +### 3.1 Recovery Time Objectives (RTO) + +| System | RTO | RPO | +|--------|-----|-----| +| Pool Contract | N/A (immutable) | N/A | +| Merkle Tree State | 4 hours | 0 (on-chain) | +| Website/Documentation | 1 hour | 24 hours | +| SDK/CLI Services | 2 hours | 24 hours | +| Governance Operations | 8 hours | 0 (on-chain) | + +### 3.2 Recovery Point Objectives (RPO) + +| Data Type | RPO | Backup Frequency | +|-----------|-----|------------------| +| On-chain State | 0 | Real-time (blockchain) | +| Off-chain Index | 1 hour | Hourly | +| Configuration | 24 hours | Daily | +| Documentation | 24 hours | Daily | + +--- + +## 4. Backup Strategies + +### 4.1 Smart Contract Backups + +#### Contract Code +```bash +# All contract code is versioned on GitHub +Repository: github.com/ANAVHEOBA/PrivacyLayer +Backup: GitHub + IPFS pinning +Frequency: Every release +``` + +#### Contract State +``` +On-chain state is immutable and stored on Stellar ledger +Backup method: Archive nodes + Horizon instances +Frequency: Real-time (blockchain native) +``` + +### 4.2 Key Management + +#### Governance Keys +``` +Storage: Hardware Security Modules (HSM) +Backup: Shamir's Secret Sharing (4/7 threshold) +Locations: 7 geographically distributed custodians +Rotation: Annual or upon custodian change +``` + +#### Operational Keys +``` +Storage: Hardware wallets + encrypted backup +Backup: Encrypted offline backup +Locations: Secure physical storage + cloud vault +Rotation: Quarterly +``` + +### 4.3 Data Backups + +#### Merkle Tree State +```bash +# Automatic backup script +#!/bin/bash +TIMESTAMP=$(date +%Y%m%d_%H%M%S) +stellar contract invoke --id $POOL_ID --method get_root > "backup/root_${TIMESTAMP}.json" +aws s3 cp "backup/root_${TIMESTAMP}.json" s3://privacylayer-backups/merkle/ +``` + +#### User Transaction Index +``` +Primary: PostgreSQL on AWS RDS +Replica: Read replica in different AZ +Backup: Daily snapshots + WAL archiving +Retention: 90 days +``` + +### 4.4 Infrastructure Backups + +| Component | Backup Method | Frequency | Retention | +|-----------|---------------|-----------|-----------| +| Website | Git + CDN cache | Per commit | Indefinite | +| API Servers | AMI snapshots | Daily | 30 days | +| DNS Records | Zone file export | Daily | 90 days | +| SSL Certificates | PKCS12 export | Per renewal | 1 year | + +--- + +## 5. Recovery Procedures + +### 5.1 Smart Contract Incident + +#### Scenario: Critical Bug Discovered + +**Phase 1: Immediate Response (0-1 hour)** + +1. **Alert and Assess** + ```bash + # Verify the issue + stellar contract invoke --id $POOL_ID --method get_status + + # Check recent transactions + stellar transactions --account $POOL_ID --limit 100 + ``` + +2. **Halt Operations (if possible)** + ```bash + # If circuit breaker exists + stellar contract invoke --id $POOL_ID --method pause --source $ADMIN_KEY + ``` + +3. **Notify Stakeholders** + - Post incident banner on website + - Send Discord announcement + - Email registered users + +**Phase 2: Investigation (1-4 hours)** + +1. **Root Cause Analysis** + - Review contract code + - Analyze affected transactions + - Document findings + +2. **Impact Assessment** + - Number of affected users + - Funds at risk + - Severity classification + +**Phase 3: Recovery (4-24 hours)** + +1. **Develop Fix** + - Create fix branch + - Implement solution + - Peer review + +2. **Deploy Fix** + ```bash + # Deploy new implementation + stellar contract deploy --wasm target/privacy_pool.wasm --source $ADMIN_KEY + + # Upgrade proxy (if using upgradeable pattern) + stellar contract invoke --id $PROXY_ID --method upgrade --arg $NEW_IMPL + ``` + +3. **Resume Operations** + ```bash + # Unpause if paused + stellar contract invoke --id $POOL_ID --method unpause --source $ADMIN_KEY + ``` + +### 5.2 Key Compromise + +#### Scenario: Governance Key Compromised + +**Immediate Actions (0-1 hour)** + +1. **Assess Compromise** + - Identify which key(s) compromised + - Check if threshold still safe (4/7) + +2. **Emergency Actions** + ```bash + # If < 4 keys remain secure, execute emergency transfer + # This requires 4 of remaining keys to sign + stellar contract invoke --id $POOL_ID --method emergency_transfer \ + --source $REMAINING_KEY_1,$REMAINING_KEY_2,$REMAINING_KEY_3,$REMAINING_KEY_4 + ``` + +3. **Key Rotation** + - Generate new key + - Coordinate with remaining custodians + - Update on-chain configuration + +**Recovery Actions (1-7 days)** + +1. Generate new governance key +2. Coordinate multi-sig update +3. Verify all operations restored +4. Post-mortem and documentation + +### 5.3 Infrastructure Failure + +#### Scenario: Primary RPC Node Down + +**Immediate Response (0-15 minutes)** + +1. **Verify Failure** + ```bash + curl -I https://api.privacylayer.io/health + ``` + +2. **Failover to Backup** + ```bash + # Update DNS to backup endpoint + cloudflare-cli dns update --name api --content backup.privacylayer.io + ``` + +3. **Notify Users** + - Update status page + - Post to Discord + +**Recovery (15 minutes - 2 hours)** + +1. Diagnose primary failure +2. Repair or replace node +3. Restore primary configuration +4. Failback when stable + +### 5.4 Data Corruption + +#### Scenario: Merkle Tree Index Corruption + +**Detection** +```bash +# Verify index matches on-chain state +./scripts/verify_merkle_index.sh + +# Expected: "Index verified successfully" +# Failure: "Index mismatch at position X" +``` + +**Recovery** +```bash +# Rebuild index from on-chain data +./scripts/rebuild_merkle_index.sh + +# Verify rebuilt index +./scripts/verify_merkle_index.sh + +# Restart services +systemctl restart privacylayer-api +``` + +--- + +## 6. Communication Plan + +### 6.1 Communication Channels + +| Channel | Use Case | Audience | +|---------|----------|----------| +| Status Page | Service status | All users | +| Discord | Real-time updates | Community | +| Twitter/X | Public announcements | General public | +| Email | Detailed updates | Registered users | +| GitHub | Technical updates | Developers | + +### 6.2 Incident Communication Templates + +#### Initial Notification + +``` +Subject: [PrivacyLayer] Incident Detected - [Brief Description] + +Dear PrivacyLayer Users, + +We have detected an incident affecting [component]. + +**Current Status**: Investigating +**Impact**: [Describe impact] +**Started**: [Timestamp UTC] + +Our team is actively working on this issue. We will provide updates every [X] minutes. + +Follow our status page for real-time updates: status.privacylayer.io + +Thank you for your patience. + +PrivacyLayer Team +``` + +#### Resolution Notification + +``` +Subject: [PrivacyLayer] Incident Resolved - [Brief Description] + +Dear PrivacyLayer Users, + +The incident affecting [component] has been resolved. + +**Summary**: [Brief description] +**Duration**: [X hours Y minutes] +**Root Cause**: [Brief explanation] +**Resolution**: [What was done] + +**User Actions Required**: [If any] + +A full post-mortem will be published within [X] days. + +Thank you for your patience. + +PrivacyLayer Team +``` + +### 6.3 Stakeholder Communication Matrix + +| Stakeholder | Notification Time | Method | Content | +|-------------|-------------------|--------|---------| +| Core Team | Immediate | Slack | Full details | +| Governance | < 1 hour | Secure channel | Impact assessment | +| Partners | < 2 hours | Email | Service status | +| Users | < 2 hours | Status page + Discord | Affected services | +| Public | < 4 hours | Twitter | High-level status | +| Regulators | As required | Official channel | Compliance details | + +--- + +## 7. Testing Procedures + +### 7.1 Testing Schedule + +| Test Type | Frequency | Scope | Duration | +|-----------|-----------|-------|----------| +| Tabletop Exercise | Quarterly | All scenarios | 2 hours | +| Technical DR Test | Monthly | Infrastructure | 4 hours | +| Smart Contract Drill | Quarterly | Contract recovery | 4 hours | +| Communication Test | Monthly | All channels | 1 hour | +| Full DR Simulation | Annually | End-to-end | 8 hours | + +### 7.2 Test Scenarios + +#### Test Case 1: RPC Node Failover + +```bash +#!/bin/bash +# DR Test: RPC Failover + +echo "Starting DR Test: RPC Failover" + +# 1. Simulate primary failure +systemctl stop privacylayer-rpc + +# 2. Verify automatic failover +curl -f https://api.privacylayer.io/health || echo "FAIL: No failover" + +# 3. Check response time +TIME=$(curl -w "%{time_total}" -o /dev/null -s https://api.privacylayer.io/health) +echo "Response time: ${TIME}s" + +# 4. Restore primary +systemctl start privacylayer-rpc + +# 5. Verify primary restored +curl -f https://api.privacylayer.io/health + +echo "DR Test Complete: RPC Failover" +``` + +#### Test Case 2: Data Recovery + +```bash +#!/bin/bash +# DR Test: Database Recovery + +echo "Starting DR Test: Database Recovery" + +# 1. Create test backup +pg_dump privacylayer_db > /tmp/test_backup.sql + +# 2. Simulate corruption +psql -c "DROP TABLE test_table;" + +# 3. Restore from backup +psql privacylayer_db < /tmp/test_backup.sql + +# 4. Verify restoration +psql -c "SELECT COUNT(*) FROM test_table;" + +echo "DR Test Complete: Database Recovery" +``` + +#### Test Case 3: Governance Key Recovery + +```bash +# DR Test: Governance Key Recovery + +echo "Starting DR Test: Governance Key Recovery" + +# 1. Simulate lost key +# (Use test key, not production) + +# 2. Initiate recovery procedure +# - Contact 4 of 7 custodians +# - Sign recovery transaction +# - Generate new key + +# 3. Verify new key works +# stellar contract invoke --id $POOL_ID --method verify_admin --source $NEW_KEY + +echo "DR Test Complete: Governance Key Recovery" +``` + +### 7.3 Test Documentation + +After each test, document: + +```markdown +## DR Test Report + +**Date**: [Date] +**Test Type**: [Type] +**Duration**: [Duration] +**Result**: [Pass/Fail/Partial] + +### Observations +- [What worked well] +- [What needs improvement] + +### Issues Found +1. [Issue 1] +2. [Issue 2] + +### Recommendations +1. [Recommendation 1] +2. [Recommendation 2] + +### Action Items +| Item | Owner | Due Date | +|------|-------|----------| +| [Action] | [Owner] | [Date] | + +### Attachments +- [Logs] +- [Screenshots] +``` + +--- + +## 8. Appendices + +### Appendix A: Emergency Contact Directory + +| Role | Name | Phone | Email | Timezone | +|------|------|-------|-------|----------| +| Incident Commander | [Name] | [Phone] | [Email] | UTC | +| Technical Lead | [Name] | [Phone] | [Email] | UTC | +| Security Lead | [Name] | [Phone] | [Email] | UTC | +| Communications Lead | [Name] | [Phone] | [Email] | UTC | + +### Appendix B: Recovery Checklist + +#### Smart Contract Incident + +- [ ] Verify incident scope +- [ ] Document initial findings +- [ ] Notify core team +- [ ] Pause contract (if applicable) +- [ ] Analyze root cause +- [ ] Develop fix +- [ ] Test fix on testnet +- [ ] Deploy fix +- [ ] Resume operations +- [ ] Post-mortem + +#### Infrastructure Incident + +- [ ] Verify incident scope +- [ ] Activate backup systems +- [ ] Notify stakeholders +- [ ] Diagnose root cause +- [ ] Repair/replace failed component +- [ ] Verify restoration +- [ ] Failback to primary +- [ ] Post-mortem + +### Appendix C: Related Documents + +- Incident Response Plan +- Security Policy +- Business Continuity Plan +- Key Management Policy +- Backup Policy + +### Appendix D: Version History + +| Version | Date | Author | Changes | +|---------|------|--------|---------| +| 1.0 | March 2026 | PrivacyLayer Team | Initial version | + +--- + +*This document is reviewed quarterly and updated as needed. Last review: March 2026* \ No newline at end of file