smom-dbis-138/runbooks/ccip-incident-response.md

CCIP Incident Response

Overview

This document outlines the incident response procedures for CCIP-related issues.

Severity Levels

Critical (P1)

• Complete service outage
• All messages failing
• Router unavailable
• Security breach

High (P2)

• High error rate (> 10%)
• Significant message delays
• Fee calculation failures

Medium (P3)

• Intermittent failures
• Minor delays
• Configuration issues

Low (P4)

• Minor errors
• Performance degradation
• Non-critical issues

Response Procedures

P1: Critical Incident

1. Immediate Actions (0-15 minutes)

   • Acknowledge incident
   • Assess impact
   • Notify team
   • Check service status

2. Investigation (15-60 minutes)

   • Review logs
   • Check router status
   • Verify contract state
   • Identify root cause

3. Mitigation (60+ minutes)

   • Implement fix
   • Verify resolution
   • Monitor recovery
   • Document incident

P2: High Priority

1. Initial Response (0-30 minutes)

   • Acknowledge issue
   • Assess impact
   • Begin investigation

2. Resolution (30-120 minutes)

   • Identify cause
   • Implement fix
   • Verify resolution

P3/P4: Medium/Low Priority

1. Documentation
   • Log issue
   • Investigate during business hours
   • Plan fix
   • Implement resolution

Common Incidents

All Messages Failing

Symptoms: No messages being delivered

Response:

1. Check router status
2. Verify LINK balance
3. Check target chain status
4. Review recent changes
5. Check contract state

Resolution:

• Restart router if needed
• Refill LINK if low
• Fix configuration issues
• Update contracts if needed

High Error Rate

Symptoms: > 10% of messages failing

Response:

1. Check error logs
2. Identify error pattern
3. Check target chain
4. Review message format

Resolution:

• Fix message format if invalid
• Update target chain selector if wrong
• Fix receiver contract if needed
• Update configuration

Router Unavailable

Symptoms: Cannot connect to router

Response:

1. Check router deployment
2. Verify network connectivity
3. Check router logs
4. Review recent changes

Resolution:

• Restart router service
• Fix network issues
• Update router address if changed
• Redeploy if necessary

Insufficient LINK

Symptoms: "Insufficient LINK" errors

Response:

1. Check LINK balance
2. Calculate required amount
3. Transfer LINK tokens
4. Verify balance updated

Resolution:

• Transfer LINK to sender contract
• Set up automatic refill
• Monitor balance regularly

Communication

Internal Communication

• Update team channel
• Create incident ticket
• Document findings
• Share resolution

External Communication

• Update status page if public
• Notify stakeholders if critical
• Provide ETA if known
• Share resolution details

Post-Incident

Incident Review

1. Root Cause Analysis

   • What happened?
   • Why did it happen?
   • How was it resolved?

2. Lessons Learned

   • What went well?
   • What could be improved?
   • Action items

3. Documentation

   • Update runbooks
   • Add monitoring
   • Improve procedures

Follow-up Actions

• Implement preventive measures
• Update monitoring
• Improve documentation
• Schedule training if needed

Escalation

When to Escalate

• P1 incidents not resolved in 1 hour
• P2 incidents not resolved in 4 hours
• Security-related issues
• Data loss or corruption

Escalation Path

1. Team Lead
2. Engineering Manager
3. CTO/Technical Director
4. External Support (Chainlink)

References

• CCIP Operations Runbook
• CCIP Troubleshooting
• CCIP Recovery Procedures