henrywang1

# Push subtree in local branch to heroku
git push heroku `git subtree split --prefix project-name local-branch-name`:master --force

megamattron

import org.web3j.crypto.Keys;
import org.web3j.crypto.Sign;
import org.web3j.utils.Numeric;

import java.security.SignatureException;

public class SignUtil {

    private static final String GETH_SIGN_PREFIX = "\u0019Ethereum Signed Message:\n32";