EIP-712 domain separator missing chainId

crvUSD (Curve Stablecoin)'s assessment for RD-F-020 — scored green on the v1.7.0 rubric. The evidence below is the curator's reasoning for this score.

Evidence summary #

crvUSD ERC-20 (Stablecoin.vy, Vyper 0.3.10) implements EIP-2612 permit with an EIP-712 domain separator. Vyper's native EIP-2612 implementation includes chain.id in the domain separator as part of the language standard. No chainId omission identified.

Sources #

GitHub
Stablecoin.vy — GitHubStablecoin.vy — Vyper 0.3.10 with EIP-2612 permit implementationretrieved 2026-05-16

Methodology #

Determine whether the EIP-712 domain separator struct omits the `chainId` field, allowing cross-chain replay.

See the full factor methodology and distribution across all protocols →

rubric_version v1.7.0 protocol crvusd factor RD-F-020 score green collected_at 2026-05-16 19:09:40