ERC-4626 virtual-share offset (OZ ≥4.9)

Ondo 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 #

OUSG and USDY are NOT ERC-4626 vaults. They use a custom RWAHub/USDYManager architecture with off-chain asset management and asynchronous mint/redemption. The OZ ≥ 4.9 virtual-share offset check is not applicable. Flux Finance uses Compound v2 cToken mechanics (not ERC-4626), where the protection pattern is seed deposits rather than virtual-share offsets. Ondo's GitHub shows `oz_contracts_version: "4.8.3"` (data cache) — below OZ 4.9, but this version is used for peripheral utility contracts,...

Sources #

Curator note
Extracted from 04-economic.md — RD-F-074 finding; no URL cited in originalretrieved 2026-04-28

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 →

rubric_version v1.7.0 protocol ondo-finance factor RD-F-074 score gray collected_at 2026-05-14 12:01:55