Breakage analysis per dependency
Usual (USD0 / bUSD0 / USUAL)'s assessment for RD-F-052 — scored yellow on the v1.7.0 rubric. The evidence below is the curator's reasoning for this score.
Evidence summary #
Breakage scenarios documented: (1) USYC oracle fails → stale collateral price accepted (no auto-pause) → minting at wrong ratio → undercollateralization risk; (2) Chainlink USDC/USD fails → SwapperEngine USDC minting halts; (3) DVN compromised (if 1/1) → synthetic cross-chain USD0 mint; (4) USYC custody pause → USD0 notionally backed but not redeemable. Yellow because these are conditional failures, not structural collapse paths for a fully-collateralized design.
Sources #
- URLHow a Single LayerZero DVN Compromise Drained $292M from KelpDAO | BlockaidBlockaid KelpDAO analysis — DVN compromise enables synthetic message → unbacked mint; maps to breakage scenario (3)retrieved 2026-05-17
- https://tech.usual.money/smart-contracts/utility-contracts/classicaloracleretrieved 2026-05-16
Methodology #
Produce a short per-dependency text describing which protocol functions halt or degrade and impact severity if each declared dependency fails.
See the full factor methodology and distribution across all protocols →