How to resolve - NotSerializableException in bootcamp-cordapp. When testing Contract

Question

I am trying to run corda-bootcamp test case for Contract. I am following as given in the video, but when trying to run the contract test - I get the error

java.io.NotSerializableException: data(net.corda.core.contracts.ContractState) -> Trying to build an object serializer for bootcamp.TokenState, but it is not constructible from its public properties, and so requires a custom serialiser.

Can someone help, how to resolve this ? I found a similar issue - here , but that did not work.

Below is the Tokenstate used,

package bootcamp;

import com.google.common.collect.ImmutableList;
import net.corda.core.contracts.BelongsToContract;
import net.corda.core.contracts.ContractState;
import net.corda.core.identity.AbstractParty;
import net.corda.core.identity.Party;

import java.util.ArrayList;
import java.util.List;

/* Our state, defining a shared fact on the ledger.
 * See src/main/java/examples/ArtState.java for an example. */
@BelongsToContract(TokenContract.class)
public class TokenState implements ContractState {

    private Party issuer;
    private Party owner;
    private int amount;

    public TokenState(Party issuer, Party owner, int amount) {
        this.issuer = issuer;
        this.owner = owner;
        this.amount = amount;
    }

    public Party getIssuer() {
        return issuer;
    }

    public Party getOwner() {
        return owner;
    }

    public int getAmount() {
        return amount;
    }

    public List<AbstractParty> getParticipants() {
        List<AbstractParty> participants = new ArrayList<>();
        participants.add(issuer);
        participants.add(owner);
        return participants;
    }
}

Test case that throws the error,

private final TestIdentity alice = new TestIdentity(new CordaX500Name("Alice", "", "GB"));
    private final TestIdentity bob = new TestIdentity(new CordaX500Name("Bob", "", "GB"));
    private MockServices ledgerServices = new MockServices(new TestIdentity(new CordaX500Name("TestId", "", "GB")));

    private TokenState tokenState = new TokenState(alice.getParty(), bob.getParty(), 1);

@Test
public void tokenContractRequiresZeroInputsInTheTransaction() {
        transaction(ledgerServices, tx -> {
            // Has an input, will fail.
            tx.input(TokenContract.ID, tokenState);
            tx.output(TokenContract.ID, tokenState);
            tx.command(Arrays.asList(alice.getPublicKey(), bob.getPublicKey()), new TokenContract.Commands.Issue());
            tx.fails();
            return null;
        });

        transaction(ledgerServices, tx -> {
            // Has no input, will verify.
            tx.output(TokenContract.ID, tokenState);
            tx.command(Arrays.asList(alice.getPublicKey(), bob.getPublicKey()), new TokenContract.Commands.Issue());
            tx.verifies();
            return null;
        });
    }

This generally is an issue when your paramter names in the constructor doesn't match with the field name of your ContractState. Can you include the code for your ContractState in the question? — Ashutosh Meher, Sep 21 '19 at 04:29
@AshutoshMeher, updated question with the ContractState code. — Muruga Balu, Sep 21 '19 at 07:46

score 1 · Accepted Answer · answered Sep 22 '19 at 04:36

Corda uses its own serialisation framework which requires the Java compiler to preserve the argument names when generating bytecode, so that objects can be correctly recreated later.

For this to work with IntelliJ do the following:

Open the settings:
- Windows: File -> Settings
- osX/ Ubuntu: IntelliJ IDEA -> Preferences
Go to Build, Execution, Deployment -> Compiler -> Java Compiler Write -parameters in the Additional command line parameters field

Completely rebuild the project (Build -> Rebuild Project)

Thanks @AshutoshMeher that helped. Also I made some initial setup wrong, this helped - https://github.com/corda/bootcamp-cordapp/blob/v4/Troubleshooting.md — Muruga Balu, Sep 22 '19 at 07:15

How to resolve - NotSerializableException in bootcamp-cordapp. When testing Contract

1 Answers1