Storage-layout collision risk across upgrades

Circle USYC's assessment for RD-F-142 — scored yellow on the v1.7.0 rubric. The evidence below is the curator's reasoning for this score.

Evidence summary #

Cannot fully assess - no public repo for OZ upgrades plugin analysis. 9 upgrades on Ethereum proxy without any public storage-layout audit documentation. UUPS pattern used which requires careful storage layout management across upgrades.

Sources #

Etherscan
USYC ETH proxy - upgrade history without storage layout auditUSYC ETH proxy: 9 implementation changes from 2023 to Dec 2025 with no storage layout audit documentationretrieved 2026-05-16

Methodology #

Determine whether the OZ upgrades-plugin or manual review flags a storage-layout collision risk between implementation versions.

See the full factor methodology and distribution across all protocols →

rubric_version v1.7.0 protocol circle-usyc factor RD-F-142 score yellow collected_at 2026-05-15 21:56:43