def eth_go
import bend-collections@1.0.0.0/src/crypto/secp256k1/ecdsa.bend as Ecdsaimport Base
import bend-collections@1.0.0.0/src/crypto/secp256k1/bytes.bend as B
323def eth_go(+h: Hash, +pk: List<&2, U32>) -> Maybe<&2, List<&2, U32>>:
324 eth_if(Bool.and(B.has_len(65n, pk), U32.is_eq(B.head(pk), 4)), keccak64(h, B.tail(pk)))