Storage-layout collision risk across upgrades

Hyperlane'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 #

Mailbox.sol inherits OwnableUpgradeable — standard OZ upgradeable pattern. No OZ upgrades plugin output available. Three major version jumps (Abacus v1 -> v2 -> Hyperlane v3) occurred without a public storage-layout verification report.

Sources #

GitHub
Mailbox.sol inheritanceMailbox.sol: inherits OwnableUpgradeable, Versioned — OZ upgradeable 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 hyperlane factor RD-F-142 score gray collected_at 2026-05-16 23:03:56