smom-dbis-138/docs/guides/BEST_PRACTICES.md

Best Practices Guide

Last Updated: 2025-01-27
Status: Active

This guide provides best practices for deploying, operating, and developing on the DeFi Oracle Meta Mainnet (ChainID 138).

Table of Contents

• Deployment Best Practices
• Operations Best Practices
• Development Best Practices
• Security Best Practices
• Monitoring Best Practices

Deployment Best Practices

Pre-Deployment

1. Review Prerequisites

   • Verify all tools are installed and configured
   • Check Azure quotas and limits
   • Verify network connectivity
   • Review Deployment Checklist

2. Plan Deployment

   • Start with canary deployment in single region
   • Verify canary before full deployment
   • Plan for rollback if needed

3. Backup Configuration

   • Backup existing configuration
   • Document current state
   • Save keys securely

During Deployment

1. Use Parallel Deployment

   • Use parallel deployment where possible
   • Monitor deployment progress
   • Verify each step before proceeding

2. Verify Incrementally

   • Verify infrastructure before deploying applications
   • Verify applications before deploying contracts
   • Test each component as it's deployed

3. Monitor Closely

   • Watch deployment logs
   • Monitor resource usage
   • Check for errors immediately

Post-Deployment

1. Comprehensive Verification

   • Verify all services are running
   • Test RPC endpoints
   • Verify contract deployments
   • Check monitoring dashboards

2. Document Deployment

   • Document deployment details
   • Record contract addresses
   • Update configuration files
   • Update documentation

Operations Best Practices

Node Management

1. Validator Management

   • Maintain minimum 4 validators
   • Distribute validators across regions
   • Monitor validator health continuously
   • Plan for validator rotation

2. Scaling

   • Scale RPC nodes based on load
   • Scale sentry nodes for P2P capacity
   • Never scale validators (consensus requirement)

3. Updates

   • Test updates in staging first
   • Use rolling updates for non-validators
   • Coordinate validator updates carefully
   • Have rollback plan ready

Monitoring

1. Set Up Alerts

   • Configure critical alerts
   • Set appropriate thresholds
   • Test alert channels
   • Review alerts regularly

2. Regular Reviews

   • Review dashboards daily
   • Analyze trends weekly
   • Review alerts monthly
   • Update dashboards as needed

3. Log Management

   • Centralize logs in Loki
   • Set appropriate retention
   • Monitor log volume
   • Archive old logs

Backup and Recovery

1. Regular Backups

   • Backup chaindata daily
   • Backup configuration weekly
   • Test restore procedures quarterly
   • Document backup procedures

2. Disaster Recovery

   • Maintain DR runbook
   • Test DR procedures regularly
   • Keep backups in multiple locations
   • Verify backup integrity

Development Best Practices

Smart Contract Development

1. Security First

   • Run security scans before deployment
   • Review all code changes
   • Test thoroughly
   • Use established patterns

2. Testing

   • Write unit tests for all contracts
   • Write integration tests
   • Use fuzz testing
   • Test edge cases

3. Code Quality

   • Follow Solidity style guide
   • Use consistent naming
   • Document complex logic
   • Review code before merging

Integration Development

1. Error Handling

   • Handle all errors gracefully
   • Provide meaningful error messages
   • Log errors appropriately
   • Retry with backoff

2. Rate Limiting

   • Respect rate limits
   • Implement client-side rate limiting
   • Handle rate limit errors
   • Use connection pooling

3. Monitoring

   • Instrument your code
   • Log important events
   • Track metrics
   • Set up alerts

Security Best Practices

Key Management

1. Never Commit Keys

   • Use environment variables
   • Use Azure Key Vault
   • Rotate keys regularly
   • Limit key access

2. Access Control

   • Use least privilege principle
   • Review access regularly
   • Use RBAC
   • Audit access logs

Network Security

1. Network Segmentation

   • Keep validators in private subnets
   • Use NSGs appropriately
   • Limit public exposure
   • Use VPN for admin access

2. TLS/SSL

   • Use TLS for all connections
   • Keep certificates updated
   • Use strong cipher suites
   • Monitor certificate expiration

Code Security

1. Security Scanning

   • Run scans before deployment
   • Fix critical issues immediately
   • Review all findings
   • Keep tools updated

2. Dependency Management

   • Keep dependencies updated
   • Scan for vulnerabilities
   • Use trusted sources
   • Review dependency changes

Monitoring Best Practices

Metrics

1. Key Metrics

   • Block production rate
   • Transaction throughput
   • RPC latency
   • Error rates
   • Resource usage

2. Alerting

   • Set appropriate thresholds
   • Avoid alert fatigue
   • Test alerts regularly
   • Document alert procedures

Dashboards

1. Organization

   • Organize by service
   • Use consistent naming
   • Keep dashboards focused
   • Update regularly

2. Visibility

   • Make dashboards accessible
   • Use appropriate time ranges
   • Include context
   • Document dashboards

Configuration Best Practices

1. Version Control

   • Store configs in version control
   • Use environment-specific configs
   • Document all changes
   • Review config changes

2. Validation

   • Validate configs before deployment
   • Use schema validation
   • Test configs in staging
   • Document config options

3. Secrets Management

   • Never store secrets in config files
   • Use secret management tools
   • Rotate secrets regularly
   • Audit secret access

Related Documentation

• Deployment Guide
• Security Documentation
• Monitoring Setup Guide
• Troubleshooting Guide

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Last Updated: 2025-01-27