Registering a subnamespace

Register a subnamespace following this guide.

Background

Once you have a registered root namespace, you can create up to 3 levels of subnamespaces.

Subnamespaces do not have a renting duration on its own. They have the same one as their parent namespace.

It is possible to create multiple subnamespaces with the same name in different namespaces (example: foo.bar and foo2.bar).

Prerequisites

• XPX-Chain-SDK or XPX-Chain-CLI
• A text editor or IDE
• An account with xpx and at least one namespace
• Finish registering a namespace guide

Getting into some code

The first step is to choose a name for your subnamespace.

In this example, we have registered a subnamespace called bar under foo namespace.

Golang

TypeScript

JavaScript

Java

CLI

conf, err := sdk.NewConfig(context.Background(), []string{"http://bctestnet1.brimstone.xpxsirius.io:3000"})
if err != nil {
    panic(err)
}

// Use the default http client
client := sdk.NewClient(nil, conf)

subNamespaceName := "bar"
parentNamespaceName := "foo"

// Create an account from a private key
account, err := client.NewAccountFromPrivateKey(os.Getenv("PRIVATE_KEY"))
if err != nil {
    panic(err)
}

// Create parent namespace id
parentNamespaceId, err := sdk.NewNamespaceIdFromName(parentNamespaceName)
if err != nil {
    panic(err)
}

// Create a new namespace type transaction
transaction, err := client.NewRegisterSubNamespaceTransaction(
    // The maximum amount of time to include the transaction in the blockchain.
    sdk.NewDeadline(time.Hour),
    // Name of namespace
    subNamespaceName,
    // Parent namespace id
    parentNamespaceId,
)
if err != nil {
    panic(err)
}

// Sign transaction
signedTransaction, err := account.Sign(transaction)
if err != nil {
    panic(err)
}

// Announce transaction
_, err = client.Transaction.Announce(context.Background(), signedTransaction)
if err != nil {
    panic(err)
}

const transactionHttp = new TransactionHttp('http://bctestnet1.brimstone.xpxsirius.io:3000');

const privateKey = process.env.PRIVATE_KEY as string;
const account = Account.createFromPrivateKey(privateKey, NetworkType.TEST_NET);

const rootNamespaceName = 'foo';
const subnamespaceName = 'bar';

const registerNamespaceTransaction = RegisterNamespaceTransaction.createSubNamespace(
    Deadline.create(),
    subnamespaceName,
    rootNamespaceName, // can be a namespaceId
    NetworkType.TEST_NET);

const signedTransaction = account.sign(registerNamespaceTransaction, generationHash);

transactionHttp
    .announce(signedTransaction)
    .subscribe(x => console.log(x), err => console.error(err));

const transactionHttp = new TransactionHttp('http://bctestnet1.brimstone.xpxsirius.io:3000');

const privateKey = process.env.PRIVATE_KEY;
const account = Account.createFromPrivateKey(privateKey, NetworkType.TEST_NET);

const rootNamespaceName = 'foo';
const subnamespaceName = 'bar';

const registerNamespaceTransaction = RegisterNamespaceTransaction.createSubNamespace(
    Deadline.create(),
    subnamespaceName,
    rootNamespaceName, // can be a namespaceId
    NetworkType.TEST_NET);

const signedTransaction = account.sign(registerNamespaceTransaction, generationHash);

transactionHttp
    .announce(signedTransaction)
    .subscribe(x => console.log(x), err => console.error(err));

    // Replace with private key
    final String privateKey = "";

    final Account account = Account.createFromPrivateKey(privateKey, NetworkType.TEST_NET);

    // Replace with root namespace name
    final NamespaceId rootNamespaceId = new NamespaceId("foo");

    //Replace with subnamespace name
    final String subnamespaceName = "bar";

    final RegisterNamespaceTransaction registerNamespaceTransaction = RegisterNamespaceTransaction.createSubNamespace(
        Deadline.create(2, ChronoUnit.HOURS),
        subnamespaceName,
        rootNamespaceId,
        NetworkType.TEST_NET
    );

    final RegisterNamespaceTransaction registerNamespaceTransaction = new TransactionBuilderFactory()
            .registerNamespace().subNamespace(rootNamespaceId, subnamespaceName)
            .deadline(new Deadline(2, ChronoUnit.HOURS))
            .networkType(NetworkType.TEST_NET).build();

    final SignedTransaction signedTransaction = account.sign(registerNamespaceTransaction, generationHash);

    final TransactionHttp transactionHttp = new TransactionHttp("http://bctestnet1.brimstone.xpxsirius.io:3000");

    transactionHttp.announce(signedTransaction).toFuture().get();

xpx2-cli transaction namespace --subnamespace --parentname foo --name bar

What’s next?

When the transaction is confirmed, link a namespace with a mosaic or address.