ecrecover zero-address return unchecked
Falcon Finance's assessment for RD-F-019 — scored green on the v1.7.0 rubric. The evidence below is the curator's reasoning for this score.
Evidence summary #
USDf uses OZ ERC20PermitUpgradeable which uses OZ ECDSA.recover() — safe wrapper. No ecrecover finding in Zellic audit. Etherscan dep listing confirms OZ upgradeable pattern.
Detail #
USDf implementation imports ERC20PermitUpgradeable and EIP712Upgradeable from OZ (confirmed from Etherscan dependency listing). OZ's ECDSA library uses safe wrappers around ecrecover that handle zero-address returns. Zellic found no ecrecover-related finding. No evidence of raw ecrecover calls in the audited scope. Confidence medium because post-TGE contracts are not inspected.
Sources #
- EtherscanUSDf Implementation — Etherscan dependency listingUSDf impl dependency: ERC20PermitUpgradeable + EIP712Upgradeable (OZ safe ECDSA)retrieved 2026-05-12
Methodology #
Determine whether any `ecrecover` call result is used without a `!= address(0)` guard.
See the full factor methodology and distribution across all protocols →