Storage-layout collision risk across upgrades

Balancer (v2 + v3)'s assessment for RD-F-142 — scored green on the v1.7.0 rubric. The evidence below is the curator's reasoning for this score.

Evidence summary #

v2 Vault is immutable (not upgradeable). v3 Vault, VaultExtension, VaultAdmin are immutable contracts. v3 uses internal delegatecall to fixed immutable extension addresses — not behind UUPS/transparent proxies. No OZ upgrades plugin storage layout checks applicable. Storage collision risk is non-applicable in this architecture.

Sources #

Docs
Balancer v3 Vault API Documentationv3 Vault architecture — immutable extensions called via delegatecall from immutable Vaultretrieved 2026-05-05

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 balancer factor RD-F-142 score green collected_at 2026-05-05 12:41:36