# Incident Response Runbook

**Purpose**: Procedures for responding to bridge system incidents

---

## 🚨 Incident Classification

### Critical (P0)
- Bridge contract not accessible
- RPC endpoint completely down
- All destination chains unavailable
- Security breach detected

### High (P1)
- Single destination chain unavailable
- High transaction failure rate
- Balance issues preventing transfers

### Medium (P2)
- Performance degradation
- Monitoring system down
- Documentation issues

### Low (P3)
- Minor configuration issues
- Documentation updates needed

---

## 📋 Incident Response Procedure

### 1. Detection

**Automated Monitoring**:
```bash
bash scripts/automated-monitoring.sh
```

**Manual Check**:
```bash
bash scripts/health-check.sh
```

### 2. Assessment

**Gather Information**:
```bash
# System status
bash scripts/health-check.sh

# Recent transactions
bash scripts/monitor-bridge-transfers.sh

# Error logs
tail -100 logs/alerts-$(date +%Y%m%d).log
```

### 3. Containment

**Pause Operations if Needed**:
```bash
# Pause bridge
cast send <BRIDGE_ADDRESS> "pause()" --rpc-url $RPC_URL --private-key $PRIVATE_KEY
```

### 4. Resolution

**Follow Specific Procedures**:
- See troubleshooting section in Bridge Operations Runbook
- Check logs for error patterns
- Verify configuration

### 5. Recovery

**Resume Operations**:
```bash
# Unpause bridge
cast send <BRIDGE_ADDRESS> "unpause()" --rpc-url $RPC_URL --private-key $PRIVATE_KEY

# Verify system
bash scripts/test-suite.sh all
```

### 6. Post-Incident

**Documentation**:
- Document incident details
- Update runbooks if needed
- Review monitoring alerts

---

## 🔍 Common Incidents

### RPC Outage

**Symptoms**: Cannot connect to RPC endpoint

**Response**:
1. Check RPC endpoint status
2. Verify network connectivity
3. Switch to backup RPC if available
4. Contact infrastructure team

### Bridge Contract Issue

**Symptoms**: Bridge contract calls failing

**Response**:
1. Verify contract address
2. Check contract code
3. Verify network status
4. Check for contract upgrades

### High Failure Rate

**Symptoms**: Many transactions failing

**Response**:
1. Check gas prices
2. Verify balances
3. Check destination chain status
4. Review recent changes

---

**Last Updated**: $(date)

