Storage-layout collision risk across upgrades

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

Evidence summary #

CCIP uses redeployment (new contract deployment + reference redirect), NOT proxy upgrade with storage layout continuity. Storage layout collision risk is eliminated by architectural design — each new version is a fresh deployment with fresh storage at a new address.

Sources #

Docs
Onchain Architecture - Upgradability (EVM) | Chainlink DocumentationCCIP upgradability docs — 'deploy a new version of the contract and redirect references to the newly deployed contract'; no proxy upgrade storage continuityretrieved 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 chainlink-ccip factor RD-F-142 score not_applicable collected_at 2026-05-16 01:55:09