How to use

sha256

method

in

io.yggdrash.common.crypto.HashUtil

@Test
public void keyRecovery() {
  ECKey key = new ECKey();
  String message = "Hello World!";
  byte[] hash = HashUtil.sha256(message.getBytes());
  ECKey.ECDSASignature sig = key.doSign(hash);
  key = ECKey.fromPublicOnly(key.getPubKeyPoint());
  boolean found = false;
  for (int i = 0; i < 4; i++) {
    ECKey key2 = ECKey.recoverFromSignature(i, sig, hash);
    checkNotNull(key2);
    if (key.equals(key2)) {
      found = true;
      break;
    }
  }
  assertTrue(found);
}