NEM2: Create and assign a namespace to an alias

namespace_alias.ts

import {
    Account,
    AggregateTransaction,
    AliasActionType,
    AliasTransaction,
    Deadline,
    NetworkType,
    RegisterNamespaceTransaction,
    TransactionHttp,
    UInt64
} from "nem2-sdk";

const namespaceName = 'foo';
const nodeUrl = 'http://localhot:3000';
const privateKey = ''; // replace with your private key

const account = Account.createFromPrivateKey(privateKey, NetworkType.MIJIN_TEST);

const registerNamespaceTx = RegisterNamespaceTransaction.createRootNamespace(
    Deadline.create(),
    namespaceName,
    UInt64.fromUint(100000),
    NetworkType.MIJIN_TEST
);

const registerAliasTx = AliasTransaction.createForAddress(
    Deadline.create(),
    AliasActionType.Link,
    registerNamespaceTx.namespaceId,
    account.address,
    NetworkType.MIJIN_TEST);

const aggregateTransactionTx = AggregateTransaction.createComplete(
    Deadline.create(),
    [
        registerNamespaceTx.toAggregate(account.publicAccount),
        registerAliasTx.toAggregate(account.publicAccount),
    ],NetworkType.MIJIN_TEST, []);

const signedTx = account.sign(aggregateTransactionTx);

const transactionHttp = new TransactionHttp(nodeUrl);

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