TypeScriptでfilter, mergeMapが読み込まれない。

Question

#概要
TypeScriptのコンパイルがうまくいきません。

#環境
Windows 10
TypeScript Version 3.3.4000
Node.js v8.11.3
nem2-cli @0.11.0
nem2-sdk @0.11.1
npm @6.9.0
#ソースコード
NEMの公式チュートリアルのコードになります。

import {
    Account, Address, Deadline, UInt64, NetworkType, PlainMessage, TransferTransaction, Mosaic, MosaicId,
    TransactionHttp, NamespaceHttp, RegisterNamespaceTransaction, NamespaceId, AliasTransaction, AliasActionType,
    AggregateTransaction, MosaicNonce, MosaicDefinitionTransaction, MosaicProperties, MosaicSupplyChangeTransaction,
    MosaicSupplyType, EmptyMessage, NetworkCurrencyMosaic, Listener, PublicAccount, LockFundsTransaction
} from 'nem2-sdk';


/* ここまでいつもの */


const nodeUrl = "http://~";
const transactionHttp = new TransactionHttp(nodeUrl);
const listener = new Listener(nodeUrl);

const alicePrivateKey = "8BF8~";
const aliceAccount = Account.createFromPrivateKey(alicePrivateKey, NetworkType.MIJIN_TEST);

const ticketDistributorPublicKey = '63FD~';
const ticketDistributorPublicAccount = PublicAccount.createFromPublicKey(
    ticketDistributorPublicKey, 
    NetworkType.MIJIN_TEST
);

const aliceToTicketDistributorTx = TransferTransaction.create(
    Deadline.create(),
    ticketDistributorPublicAccount.address,
    [NetworkCurrencyMosaic.createRelative(100)],
    PlainMessage.create('send 100 xem to distributor'),
    NetworkType.MIJIN_TEST);

const ticketDistributorToAliceTx = TransferTransaction.create(
    Deadline.create(),
    aliceAccount.address,
    [new Mosaic(new MosaicId('2be9~'), UInt64.fromUint(1))],
    PlainMessage.create('send 1 museum ticket to alice'),
    NetworkType.MIJIN_TEST
);

const aggregateTransaction = AggregateTransaction.createBonded(
    Deadline.create(),
    [aliceToTicketDistributorTx.toAggregate(aliceAccount.publicAccount),
        ticketDistributorToAliceTx.toAggregate(ticketDistributorPublicAccount)],
    NetworkType.MIJIN_TEST
);

const signedTransaction = aliceAccount.sign(aggregateTransaction);




const lockFundsTransaction = LockFundsTransaction.create(
    Deadline.create(),
    NetworkCurrencyMosaic.createRelative(100),
    UInt64.fromUint(480),
    signedTransaction,
    NetworkType.MIJIN_TEST);

const lockFundsTransactionSigned = aliceAccount.sign(lockFundsTransaction);

listener.open().then(() => {

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

    listener
        .confirmed(aliceAccount.address)
        .pipe(
            filter((transaction) => transaction.transactionInfo !== undefined
                && transaction.transactionInfo.hash === lockFundsTransactionSigned.hash),
            mergeMap(ignored => transactionHttp.announceAggregateBonded(signedTransaction))
        )
        .subscribe(announcedAggregateBonded => console.log(announcedAggregateBonded),
            err => console.error(err));
});

##エラーコード

>tsc aggregate_escrow.ts
aggregate_escrow.ts:71:13 - error TS2552: Cannot find name 'filter'. Did you mean 'File'?

71             filter((transaction) => transaction.transactionInfo !== undefined
               ~~~~~~

  ../../AppData/Roaming/npm/node_modules/typescript/lib/lib.dom.d.ts:5115:13
    5115 declare var File: {
                     ~~~~
    'File' is declared here.

aggregate_escrow.ts:73:13 - error TS2304: Cannot find name 'mergeMap'.

73             mergeMap(ignored => transactionHttp.announceAggregateBonded(signedTransaction))
               ~~~~~~~~


Found 2 errors.

#試したこと

npm i @types/rx rxjs

#その他
型定義ファイルの問題なんだろうと思いますが、何が足りないのかわかりません。よろしくおねがいします。

Answer 1

import {filter, mergeMap} from 'rxjs/operators';を挿入するとうまくいきました。