prateektiwari7/Corda-Blockchain

CordaApplication with UI

clone the java repo

git clone https://github.com/corda/cordapp-template-java.git ; cd cordapp-template-java

Create the file

cordapp-template-java/cordapp-contracts-states/src/main/java/com/template/IOUState.java

IOUState.java /* import com.google.common.collect.ImmutableList; import net.corda.core.identity.Party;

// Replace TemplateState's definition with: public class IOUState implements ContractState { private final int value; private final Party lender; private final Party borrower;

public IOUState(int value, Party lender, Party borrower) {
    this.value = value;
    this.lender = lender;
    this.borrower = borrower;
}

public int getValue() {
    return value;
}

public Party getLender() {
    return lender;
}

public Party getBorrower() {
    return borrower;
}

@Override
public List<AbstractParty> getParticipants() {
    return ImmutableList.of(lender, borrower);
}

}

*/

Create the file IOUFLow.java in directory as

IOUFlow.java /* import net.corda.core.contracts.Command; import net.corda.core.contracts.CommandData; import net.corda.core.identity.Party; import net.corda.core.transactions.SignedTransaction; import net.corda.core.transactions.TransactionBuilder; import net.corda.core.utilities.ProgressTracker;

import static com.template.TemplateContract.TEMPLATE_CONTRACT_ID;

// Replace TemplateFlow's definition with: @InitiatingFlow @StartableByRPC public class IOUFlow extends FlowLogic { private final Integer iouValue; private final Party otherParty;

/**
 * The progress tracker provides checkpoints indicating the progress of the flow to observers.
 */
private final ProgressTracker progressTracker = new ProgressTracker();

public IOUFlow(Integer iouValue, Party otherParty) {
    this.iouValue = iouValue;
    this.otherParty = otherParty;
}

@Override
public ProgressTracker getProgressTracker() {
    return progressTracker;
}

/**
 * The flow logic is encapsulated within the call() method.
 */
@Suspendable
@Override
public Void call() throws FlowException {
    // We retrieve the notary identity from the network map.
    final Party notary = getServiceHub().getNetworkMapCache().getNotaryIdentities().get(0);

    // We create the transaction components.
    IOUState outputState = new IOUState(iouValue, getOurIdentity(), otherParty);
    CommandData cmdType = new TemplateContract.Commands.Action();
    Command cmd = new Command<>(cmdType, getOurIdentity().getOwningKey());

    // We create a transaction builder and add the components.
    final TransactionBuilder txBuilder = new TransactionBuilder(notary)
            .addOutputState(outputState, TEMPLATE_CONTRACT_ID)
            .addCommand(cmd);

    // Signing the transaction.
    final SignedTransaction signedTx = getServiceHub().signInitialTransaction(txBuilder);

    // Finalising the transaction.
    subFlow(new FinalityFlow(signedTx));

    return null;
}

} */

$ go to library and type on cmd ./gradlew clean deployNodes

Run bash file of deployNodes

Corda web app will start .