eth-valkyoth-verify

Support crate for eth: no_std Ethereum verification boundaries.

Most users should depend on the facade crate instead:

[dependencies]
eth = "0.24"

Crates.io: https://crates.io/crates/eth

This package is published separately so the eth workspace can keep small, auditable crate boundaries. Treat it as a lower-level building block unless the eth documentation explicitly says otherwise.

The 0.13.0 support-crate release, shipped with eth 0.24.0, adds set-code replay-domain support and fail-closed decoded signature validation handling for EIP-7702 set-code transactions. The unified validation helper now returns an explicit unsupported-transaction-type error for set-code transactions until the EIP-7702 signing-hash and authorization-signature paths are admitted.

The crate also provides decoded transaction signature validation helpers for legacy EIP-155, EIP-2930, EIP-1559, and EIP-4844 transaction domains. Use raw digest recovery only after constructing the correct Ethereum signing digest and checking the transaction or structured-data domain.

Decoded transaction signature validation is still not full execution validation. It does not prove fork validity, enforce fee rules, validate account state, validate set-code authorizations, or validate blob/KZG commitments.

EIP-712 helpers require the caller to provide both chainId and verifyingContract, then check them against the expected execution context before sender recovery. They do not encode arbitrary typed data or prove that a domain separator was computed correctly.