Highlights
Auth Bypass: 4 prior fixes. Scrutinize any change in this area.
contracts/Settlement.sol: most-fixed (2 issues). Treat as high-risk during review.
6 high-severity fixes in this history; regressions here are high-impact.
Recurring patterns
The bug types that recur here, drawn from past fixes, not open vulnerabilities.
Auth Bypass: Whitelist validation was bypassable when no resolvers were listed or when the allowed time had not passed; the fix moved the allowedTime check into _isWhitelisted and added an explicit resolversCount==0 check.
Auth Bypass: Separate whitelist and fee extensions allowed settlement without enforcing whitelist status; the fix merged them into combined validation.
Authorization Bypass: Order interactions lacked a resolver whitelist check, allowing unauthorized resolver calls; the fix added the check on _settleOrder.