Storage-layout collision risk across upgrades

Usual (USD0 / bUSD0 / USUAL)'s assessment for RD-F-142 — scored gray on the v1.7.0 rubric. The evidence below is the curator's reasoning for this score.

Evidence summary #

bUSD0 has 9 upgrades. OZ upgrades plugin storage-layout collision analysis requires source access. Private GitHub repo prevents assessment. Versioned initializers (V2, V3) suggest careful versioning but each upgrade introduces collision risk without access to storage layout declarations.

Sources #

Etherscan
bUSD0 proxy — upgrade frequency and versioned initializers0x35D8949372D46B7a3D5A56006AE77B215fc69bC0: 9 Upgraded events; bUSD0 impl uses initializeV3() patternretrieved 2026-05-17

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 usual factor RD-F-142 score gray collected_at 2026-05-16 20:39:44