UUPS _authorizeUpgrade correctly permissioned

USDD (Decentralized USD)'s assessment for RD-F-021 — scored not_applicable on the v1.7.0 rubric. The evidence below is the curator's reasoning for this score.

Evidence summary #

Ethereum ERC-20 is a standalone non-proxy contract (confirmed: no proxy pattern, no UUPS structure). UUPS _authorizeUpgrade factor is N/A for non-upgradeable contracts. TRON TVM: EVM-specific pattern not applicable.

Sources #

Etherscan
Usdd Stablecoin source - EtherscanUSDD Ethereum ERC-20 - standalone non-proxy contract confirmedretrieved 2026-05-17

Methodology #

Determine whether the UUPS implementation defines `_authorizeUpgrade(address)` restricted to owner/admin/timelock (not open to arbitrary callers).

See the full factor methodology and distribution across all protocols →

rubric_version v1.7.0 protocol usdd factor RD-F-021 score not_applicable collected_at 2026-05-17 11:34:18