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smom-dbis-138/docs/security/SECURITY_CHECKLIST.md
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Security Checklist

Date: 2026-01-24
Status: Pre-Audit Security Review

🔒 Security Review Checklist

1. Access Control ✅

  • All admin functions protected with onlyRole(DEFAULT_ADMIN_ROLE)
  • Critical functions use role-based access control
  • Role assignments are properly restricted
  • No public functions that modify critical state
  • Review role escalation vectors
  • Verify role revocation works correctly

2. Reentrancy Protection ✅

  • ReentrancyGuard used in bridge contracts
  • nonReentrant modifier on critical functions
  • Checks-Effects-Interactions pattern followed
  • Review all external calls for reentrancy risks
  • Test reentrancy attack scenarios

3. Integer Overflow/Underflow ✅

  • Solidity 0.8.20+ (built-in overflow protection)
  • SafeMath not needed (compiler handles it)
  • Review arithmetic operations for edge cases
  • Test with maximum values

4. Input Validation ✅

  • Zero address checks
  • Amount validation (non-zero, within limits)
  • Destination validation in adapters
  • Review all user inputs
  • Test with invalid inputs

5. Upgrade Safety ✅

  • UUPS proxy pattern used
  • _authorizeUpgrade protected
  • Storage layout compatibility maintained
  • Review upgrade paths
  • Test upgrade scenarios

6. Oracle Security ⚠️

  • Multiple price feeds for XAU Oracle
  • Staleness checks implemented
  • Quorum requirements for Reserve Oracle
  • Review oracle manipulation risks
  • Test oracle failure scenarios
  • Implement circuit breakers

7. Bridge Security ⚠️

  • Request ID generation uses nonces
  • Status tracking prevents double execution
  • Cancellation mechanism implemented
  • Review cross-chain message validation
  • Test message replay attacks
  • Verify CCIP message authentication

8. Token Security ✅

  • ERC20 standard compliance
  • Transfer restrictions enforced
  • Mint/burn controls implemented
  • Review token approval risks
  • Test token transfer edge cases

9. Vault Security ⚠️

  • Health ratio checks before operations
  • Liquidation protection
  • Debt ceiling enforcement
  • Review liquidation mechanics
  • Test undercollateralized scenarios
  • Verify interest accrual accuracy

10. Compliance & Regulatory ✅

  • KYC checks in ISO-4217W system
  • Reserve verification
  • Jurisdiction restrictions
  • Review compliance logic
  • Test compliance bypass attempts

🛡️ Security Best Practices

Code Quality

  • Use latest Solidity version (0.8.20)
  • Follow OpenZeppelin patterns
  • Comprehensive error messages
  • Code review completed
  • Documentation complete

Testing

  • Unit tests for core functions
  • Integration tests
  • Fuzz testing
  • Formal verification (if applicable)
  • Test coverage > 80%

Monitoring

  • Event logging for critical operations
  • Admin alerts for unusual activity
  • Bridge monitoring dashboard
  • Oracle health checks

🚨 Known Risks & Mitigations

High Risk

  1. Oracle Manipulation

    • Risk: Single oracle failure or manipulation
    • Mitigation: Multiple price feeds, quorum requirements, staleness checks
    • Status: ⚠️ Needs review

  2. Bridge Message Replay

    • Risk: Replay of cross-chain messages
    • Mitigation: Request IDs, nonces, status tracking
    • Status: ⚠️ Needs testing

  3. Liquidation Attacks

    • Risk: Front-running liquidation transactions
    • Mitigation: MEV protection, fair liquidation
    • Status: ⚠️ Needs review

Medium Risk

  1. Upgrade Risks

    • Risk: Storage collision during upgrades
    • Mitigation: UUPS pattern, storage layout checks
    • Status: ✅ Implemented

  2. Access Control

    • Risk: Role escalation or unauthorized access
    • Mitigation: Role-based access control, multi-sig
    • Status: ✅ Implemented

📋 Pre-Audit Preparation

Required Documentation

  • Architecture documentation
  • Contract specifications
  • Deployment procedures
  • Threat model
  • Risk assessment

Test Coverage

  • Unit tests
  • Integration tests
  • Fuzz tests
  • Formal verification

Code Review

  • Internal code review
  • External security review
  • Audit scheduled

✅ Security Audit Readiness

Status: ⚠️ In Progress

Completed:

  • ✅ Access control implementation
  • ✅ Reentrancy protection
  • ✅ Input validation
  • ✅ Upgrade safety

Pending:

  • ⏳ Comprehensive security audit
  • ⏳ Fuzz testing
  • ⏳ Formal verification
  • ⏳ External code review

Next Steps:

  1. Complete fuzz testing
  2. Schedule security audit
  3. Address audit findings
  4. Deploy to testnet
  5. Monitor and iterate
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