Storage-layout collision risk across upgrades

JustLend DAO'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 #

TVM substrate and Compound-style proxy pattern (Unitroller _setPendingImplementation/_acceptImplementation) rather than EIP-1967 transparent proxy. OZ upgrades plugin and storage-layout collision checks are EVM-specific tools not applicable to TRON TVM. Compound-v2-style upgrades preserve storage layout by design via the _become() acceptance mechanism.

Sources #

GitHub
JustLend Unitroller.sol — Compound-v2 proxy patternUnitroller.sol: uses _setPendingImplementation()/_acceptImplementation() Compound-v2 pattern. ComptrollerG2.sol: _become() function confirms acceptance mechanism — not EIP-1967 proxy.retrieved 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 justlend factor RD-F-142 score not_applicable collected_at 2026-05-17 10:25:32