How to use

HexUtil

in

com.msgilligan.bitcoinj.json.conversion

/**
 * Get a "raw" transaction (which we map to a bitcoinj transaction)
 * @param txid Transaction ID/hash
 * @return bitcoinj Transaction
 * @throws JsonRpcStatusException JSON RPC status exception
 * @throws IOException network error
 */
public Transaction getRawTransaction(Sha256Hash txid) throws JsonRpcStatusException, IOException {
  String hexEncoded = send("getrawtransaction", txid);
  byte[] raw = HexUtil.hexStringToByteArray(hexEncoded);
  return new Transaction(context.getParams(), raw);
}

  @Override
  public Block deserialize(JsonParser p, DeserializationContext ctxt) throws IOException, JsonProcessingException {
    JsonToken token = p.getCurrentToken();
    switch (token) {
      case VALUE_STRING:
        try {
          byte[] payload = HexUtil.hexStringToByteArray(p.getValueAsString()); // convert  to hex
          return context.getParams().getDefaultSerializer().makeBlock(payload);
        } catch (ProtocolException e) {
          throw new InvalidFormatException(p, "Invalid Block", p.getValueAsString(), Block.class);
        }
      default:
        return (Block) ctxt.handleUnexpectedToken(Block.class, p);
    }
  }
}