Smart Contract Security Audit Checklist

Create a comprehensive security audit checklist for the following smart contract:

Contract Type: ${{CONTRACT_TYPE}}
Blockchain Platform: ${{BLOCKCHAIN_PLATFORM}}
Programming Language: ${{LANGUAGE}}
Contract Purpose: ${{CONTRACT_PURPOSE}}

Please provide:
1. Pre-audit preparation steps
2. Code review checklist covering:
   - Access control vulnerabilities
   - Arithmetic issues (overflow/underflow)
   - Reentrancy vulnerabilities
   - Gas optimization concerns
   - Logic errors
3. Common vulnerability patterns to check
4. Testing requirements
5. Documentation review items
6. Post-audit recommendations

Format as an actionable checklist with priority levels (Critical, High, Medium, Low).