A simple example of Chain's Java SDK

SimpleChainExample.java

import com.chain.*;

import java.math.BigInteger;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ThreadLocalRandom;

public class Main {
    private static String projectID = "proj0ACRX7YMG091G";
    private static Client chainClient;

    public static void main(String [] args) {
        try {
            String label = String.format("test-%d-", ThreadLocalRandom.current().nextInt());

            chainClient = new Client(new URL("https://[redacted]@sandbox-api.chain.com/"));
            IssuerNode in = createIssuerNode(label + "issuer");
            Asset testAsset = chainClient.createAsset(in.ID, label + "asset");
            ManagerNode mn = createManager(label + "manager");
            Account a = createAccount(mn, label + "account");

            issueAssets(in, a, testAsset, 86);
        } catch (Exception e) {
            System.out.printf("error: %s", e);
        }
    }

    public static void issueAssets(IssuerNode in, Account a, Asset asset, Integer qty) throws ChainException {
        List<Asset.IssueOutput> outs = new ArrayList<>();
        outs.add(new Asset.IssueOutput(a.ID, null, BigInteger.valueOf(qty)));
        chainClient.issue(asset.ID, outs);
    }

    public static IssuerNode createIssuerNode(String label) throws ChainException {
        List<IssuerNode.CreateRequest.Key> keys = new ArrayList<>();
        keys.add(new IssuerNode.CreateRequest.Key().Generated());
        IssuerNode.CreateRequest req = new IssuerNode.CreateRequest(label, 1, keys);
        IssuerNode in = chainClient.createIssuerNode(projectID, req);
        chainClient.getKeyStore().add(new XPrvKey(in.keys[0].xprv, true));
        return in;
    }

    public static ManagerNode createManager(String label) throws ChainException {
        List<ManagerNode.CreateRequest.Key> keys = new ArrayList<>();
        keys.add(ManagerNode.CreateRequest.Key.Generated());
        ManagerNode.CreateRequest req = new ManagerNode.CreateRequest(label, 1, keys);
        return chainClient.createManagerNode(projectID, req);
    }

    public static Account createAccount(ManagerNode mn, String label) throws ChainException {
        Account.CreateRequest acr = new Account.CreateRequest(label);
        return chainClient.createAccount(mn.ID, acr);
    }
}