Proof

@metamask/native-utils

native-seam only: the published JS marshalling wrapper runs unchanged over a NativeUtils nitro HybridObject that computes exactly what upstream documents its C++ side to compute

95%

API coverage

No visual proof cases have been published for this package yet. The registry summary below describes what the compat layer implements.

Working

all eight hybrid methods — multiply, toPublicKey and toPublicKeyFromBytes (secp256k1, compressed and uncompressed), getPublicKeyEd25519 and getPublicKeyEd25519FromBytes, keccak256FromBytes, pubToAddress (with the @ethereumjs/util sanitize branch), and hmacSha512 — each backed by the @noble implementation upstream states it is byte-identical to, so BIP32 derivation and address computation produce the same bytes as on device

Missing (2)

the native C++ speedup itself: this is the @noble path metamask patches away for performanceso heavy HD-derivation loops run at JavaScript speed