ERC-4626 virtual-share offset (OZ ≥4.9)
Lombard Finance's assessment for RD-F-074 — scored gray on the v1.7.0 rubric. The evidence below is the curator's reasoning for this score.
Evidence summary #
N/A — Core LBTC token is a standard ERC-20, not an ERC-4626 vault. Lombard architecture docs confirm: 'deployed as standard tokens on each supported blockchain: ERC-20 on Ethereum, BEP-20 on BSC.' The separate LBTCv DeFi vault product is ERC-4626 and uses OpenZeppelin 5.0.2 (which includes virtual-share offset protection), but LBTCv is a distinct product outside the core LBTC TVL scope. This factor is gray for the core protocol. Note: if LBTCv were assessed separately, it would be green (OZ 5.0.2 implements the virtual offset).
Sources #
- GitHubLombard Finance EVM Smart Contracts — GitHubData cache: oz_contracts_version: '5.0.2' — OZ 5.0.2 includes ERC-4626 virtual offset if/when the vault pattern is usedretrieved 2026-05-05
- LBTC Design — Lombard Technical DocsLombard arch docs: 'LBTC is deployed as standard tokens on each supported blockchain: ERC-20 on Ethereum'retrieved 2026-05-05
Methodology #
Determine whether ERC-4626 vaults use OpenZeppelin ≥4.9 virtual-share offset pattern to prevent first-depositor share-inflation.
See the full factor methodology and distribution across all protocols →