Stale-approval exposure on deprecated router

USDD (Decentralized USD)'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 #

Deprecated Old USDD Token (0x0C10bF8FcB7Bf5412187A595ab97a3609160b5c6) may retain active user ERC-20 approvals. Stale approval count not quantifiable in this session without an allowance-scan tool. TRON deprecated contracts also possible.

Sources #

Etherscan
Old USDD Token — Etherscan (deprecated)Etherscan 0x0C10bF8FcB7Bf5412187A595ab97a3609160b5c6 — Old USDD Token (deprecated)retrieved 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 usdd factor RD-F-168 score gray collected_at 2026-05-17 11:34:18