Signed/unsigned arithmetic confusion
Lista DAO's assessment for RD-F-018 — scored green on the v1.7.0 rubric. The evidence below is the curator's reasoning for this score.
Evidence summary #
Solidity 0.8.x built-in overflow/underflow protection active. MakerDAO-derived math uses unchecked blocks in vat.sol for performance (explicit in source). No signed/unsigned confusion identified in reviewed contracts. Cannot fully confirm without Slither run.
Sources #
- GitHubvat.sol Sourcevat.sol — explicit unchecked blocks for known-safe arithmetic; Solidity 0.8.x overflow protection for non-unchecked pathsretrieved 2026-05-12
Methodology #
Determine whether signed-integer conversions or comparisons where unsigned was intended exist in the deployed bytecode/source.
See the full factor methodology and distribution across all protocols →
rubric_version v1.7.0 protocol lista-dao factor RD-F-018 score green collected_at 2026-05-12 17:54:05