Stale-approval exposure on deprecated router
Usual (USD0 / bUSD0 / USUAL)'s assessment for RD-F-168 — scored gray on the v1.7.0 rubric. The evidence below is the curator's reasoning for this score.
Evidence summary #
bUSD0 design changed substantially (floor price Jan 2025, burn redemption Jul 2025) but proxy address is stable (0x35D89...). No formal router deprecation in the traditional sense — the proxy is maintained in place. Allowance scan not performed (pipeline gap). Cannot confirm or deny stale approvals.
Sources #
- InternalUsual profile — bUSD0 stable proxy address00-profile.md §3: bUSD0 proxy address 0x35D89... retained through all upgrades; no deprecated router identifiedretrieved 2026-05-17
Methodology #
Count the number of active user approvals (ERC-20 `allowance`) to deprecated router or protocol contracts.
See the full factor methodology and distribution across all protocols →
rubric_version v1.7.0 protocol usual factor RD-F-168 score gray collected_at 2026-05-16 20:39:44