def eth_go
import bend-collections@1.0.0.0/spec/crypto/secp256k1/ecdsa.bend as Ecdsaimport Base
import bend-collections@1.0.0.0/spec/crypto/secp256k1/curve.bend as CV
290def eth_go(+h: Hash, +pk: List<&2, U32>) -> Maybe<&2, List<&2, U32>>:
291 eth_if(Bool.and(CV.length_is(65n, pk), U32.is_eq(CV.head(pk), 4)), keccak64(h, CV.after(1n, pk)))