Refined scala calls demo

Test.java

import com.wavesplatform.account.Address;
import com.wavesplatform.account.KeyPair;
import com.wavesplatform.common.state.ByteStr;
import com.wavesplatform.state.DataEntry;
import com.wavesplatform.transaction.Asset;
import com.wavesplatform.transaction.DataTransaction;
import com.wavesplatform.transaction.Proofs;
import com.wavesplatform.transaction.smart.InvokeScriptTransaction;
import com.wavesplatform.transaction.smart.SetScriptTransaction;
import com.wavesplatform.transaction.transfer.TransferTransaction;
import scala.Option;
import scala.collection.immutable.Seq;

public class Test {
  public static void main(String[] args) {
    final KeyPair keyPair = KeyPair.apply("test".getBytes());
    Address address = Address.fromPublicKey(keyPair.publicKey(), (byte) 'W');

    TransferTransaction transfer =
        new TransferTransaction(
            (byte) 1,
            keyPair.publicKey(),
            address,
            Asset.waves(),
            100,
            Asset.waves(),
            100,
            ByteStr.empty(),
            100,
            Proofs.empty(),
            (byte) 'W');
    TransferTransaction signedTransfer = Transactions.sign(transfer, keyPair.privateKey());
    System.out.println(Transactions.jsonString(signedTransfer));

    Seq<DataEntry<?>> entries =
        ScalaColls.list(DataEntries.string("test", "test"), DataEntries.integer("test1", 123));
    DataTransaction data =
        new DataTransaction(
            (byte) 1, keyPair.publicKey(), entries, 100, 100, Proofs.empty(), (byte) 'W');
    DataTransaction signedData = Transactions.sign(data, keyPair.privateKey());
    System.out.println(Transactions.jsonString(signedData));

    SetScriptTransaction setScript =
        new SetScriptTransaction(
            (byte) 1,
            keyPair.publicKey(),
            Option.apply(Scripts.compile("true")),
            100,
            100,
            Proofs.empty(),
            (byte) 'W');
    SetScriptTransaction signedSetScript = Transactions.sign(setScript, keyPair.privateKey());
    System.out.println(Transactions.jsonString(signedSetScript));

    InvokeScriptTransaction invoke =
        new InvokeScriptTransaction(
            (byte) 1,
            keyPair.publicKey(),
            address,
            Scripts.functionCall("test", "test", 123),
            ScalaColls.list(),
            100,
            Asset.waves(),
            100,
            Proofs.empty(),
            (byte) 'W');
    InvokeScriptTransaction signedInvoke = Transactions.sign(invoke, keyPair.privateKey());
    System.out.println(Transactions.jsonString(signedInvoke));
  }
}