Challenges
Reentrancy vulnerability in freight payment escrow contract
Access control bypass in shipment status oracle
Integer overflow in cargo weight calculation module
Our Solution
✦ReentrancyGuard with checks-effects-interactions pattern enforced
✦Role-based access control with on-chain multi-party attestation
✦SafeMath migration with custom overflow assertions and fuzzing suite
Results
✓Zero critical findings in post-remediation audit
✓Mainnet deployment with public audit report published
✓Insurance underwriter accepted contract security posture