How to use

createEip155SignatureData

method

in

org.web3j.crypto.TransactionEncoder

public static byte[] signMessage(
    RawTransaction rawTransaction, byte chainId, Credentials credentials) {
  byte[] encodedTransaction = encode(rawTransaction, chainId);
  Sign.SignatureData signatureData = Sign.signMessage(
      encodedTransaction, credentials.getEcKeyPair());
  Sign.SignatureData eip155SignatureData = createEip155SignatureData(signatureData, chainId);
  return encode(rawTransaction, eip155SignatureData);
}

public static byte[] signMessage(
    RawTransaction rawTransaction, byte chainId, Credentials credentials) {
  byte[] encodedTransaction = encode(rawTransaction, chainId);
  Sign.SignatureData signatureData = Sign.signMessage(
      encodedTransaction, credentials.getEcKeyPair());
  Sign.SignatureData eip155SignatureData = createEip155SignatureData(signatureData, chainId);
  return encode(rawTransaction, eip155SignatureData);
}