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Typescript API

Language grade: JavaScript

@stoqey/ib is an Interactive Brokers TWS (or IB Gateway) Typescript API client library for Node.js. It is a direct port of Interactive Brokers' Java Client Version 9.76 from May 08 2019.

Refer to the Trader Workstation API for the official documentation and the C#/Java/VB/C++/Python client.

The module makes a socket connection to TWS (or IB Gateway) using the net module and all messages are entirely processed in Typescript. It uses EventEmitter to pass the result back to user.

Installation

$ npm install @stoqey/ib

or

$ yarn add @stoqey/ib

Update from 1.1.x to 1.2.x

If you currently use version 1.1.x and want to upgrade to 1.2.x please note that there is a breaking change that might affect your code:

Versions up to 1.1.x did return Number.MAX_VALUE on values that are not available. This was to be in-sync with the official TWS API Java interfaces. Since the usage of Number.MAX_VALUE is very uncommon in JScript/TS and caused / causes lot of confusion, all versions starting from 1.2.1 will return undefined instead.

If you have checked for Number.MAX_VALUE up to now, you can drop this check. If you have not checked for undefined yet, you should add it.

Example:

ib.on(EventName.pnlSingle, (
      reqId: number,
      pos: number,
      dailyPnL: number,
      unrealizedPnL: number,
      realizedPnL: number,
      value: number
    ) => {
      ...
    }
  );

now is (look at unrealizedPnL and realizedPnL)

ib.on(EventName.pnlSingle, (
      reqId: number,
      pos: number,
      dailyPnL: number,
      unrealizedPnL: number | undefined,
      realizedPnL: number | undefined,
      value: number
    ) => {
      ...
    }
  );

API Documenation

See API documentation here.

IBApi vs IBApiNext

There are two APIs on this package, IBApi and IBApiNext.

IBApi replicates the official TWS API as close as possible, making it easy to migrate or port existing code. It implements all functions and provides same event callbacks as the official TWS API does.

IBApiNext is a preview of a new API that is currently in development. The goal of IBApiNext is it, to provide same functionality as IBApi, but focus on usability rather than replicating the official interface. It is not based on a request/event design anymore, but it does use RxJS instead. IBApiNext still is in preview stage. Not all functions are available yet, and we cannot guarantee stable interfaces (although are we confident that public signatures of already existing functions won't change anymore).

IB socket ports

Platform Port
IB Gateway live account  4001
IB Gateway paper account  4002
TWS Live Account 7496
TWS papertrading account 7497 

IBApi Examples

/* Example: Print all portfolio positions to console. */

import { IBApi, EventName, ErrorCode, Contract } from "@stoqey/ib";

// create IBApi object

const ib = new IBApi({
  // clientId: 0,
  // host: '127.0.0.1',
  port: 7497,
});

// register event handler

let positionsCount = 0;

ib.on(EventName.error, (err: Error, code: ErrorCode, reqId: number) => {
  console.error(`${err.message} - code: ${code} - reqId: ${reqId}`);
})
  .on(
    EventName.position,
    (account: string, contract: Contract, pos: number, avgCost?: number) => {
      console.log(`${account}: ${pos} x ${contract.symbol} @ ${avgCost}`);
      positionsCount++;
    }
  )
  .once(EventName.positionEnd, () => {
    console.log(`Total: ${positionsCount} positions.`);
    ib.disconnect();
  });

// call API functions

ib.connect();
ib.reqPositions();

Sending first order

ib.once(EventName.nextValidId, (orderId: number) => {
  const contract: Contract = {
    symbol: "AMZN",
    exchange: "SMART",
    currency: "USD",
    secType: SecType.STK,
  };

  const order: Order = {
    orderType: OrderType.LMT,
    action: OrderAction.BUY,
    lmtPrice: 1,
    orderId,
    totalQuantity: 1,
    account: "YOUR_ACCOUNT_ID",
  };

  ib.placeOrder(orderId, contract, order);
});

ib.connect();
ib.reqIds();

IBApiNext and RxJS

While IBApi uses a request function / event callback design where subscriptions are managed by the user, IBApiNext does use RxJS 7 to manage subscriptions.
In general, there are four types of functions on IBApiNext:

  • On-shot functions, returning a Promise, such as IBApiNext.getCurrentTime. Such functions will send a request to TWS and return the result (or error) on the Promise.

  • On-shot functions, returning an Observable, such as IBApiNext.getContractDetails. Such functions will send a request to TWS and invoke the next callback while collecting results from TWS. After all results have been collected, complete callback will be invoked. The next callback can be used to show progress information, or display results incrementally, while new ones are still being collected.
    If you are not interested on incremental update events, but only on the final result-set, use the RxJS lastValueFrom() (example lastValueFrom(IBApiNext.getContractDetails(contract))) to convert the Observable into a Promise.

  • Functions that collect a set of values first and continue to deliver updates after colleted initially, such as IBApiNext.getAccountSummary. Such functions will send a request to TWS and invoke the next callback while collecting results from TWS. After all values have been collected, complete callback will be invoked. With each update after the initial collection, the next callback will be invoked again.
    Note that you can convert this to a Promise, using lastValueFrom(), however the Promise will resolve after the initial set of values is collected and subscription will be canceled afterwards (you will not receive any updates).

  • Endless stream subscriptions, returning an Observable, such IBApiNext.getMarketData. Such functions will deliver an endless stream of update events. The complete callback will NEVER be invoked (do not try to convert to a Promise - it will never resolve!)

IB-Shell / IBApiNext Examples

The src/tools folder contains a collection of command line tools to run IBApiNext from command line. Have look on it if you search for IBApiNext sample code.

Example:

node ./dist/tools/account-summary.js -group=All -tags="NetLiquidation,MaintMarginReq" -watch -inc -port=4002
{
  "all": [
    [
      "DU******",
      [
        [
          "MaintMarginReq",
          [
            [
              "EUR",
              {
                "value": "37688.07",
                "ingressTm": 1616849611611
              }
            ]
          ]
        ]
      ]
    ]
  ],
  "added": [
    [
...

Testing

Locally

! WARNING ! - Make sure to test on papertrading account as tests could contain actions that result in selling and buying financial instruments.

The easiest way to start testing and playing around with the code is to run included IB Gateway docker container. To set it up use following steps.

Copy sample.env to file .env

  1. run yarn to install dependencies
  2. cp sample.env .env
  3. fill in the account info
  4. you might need to change the value of IB_PORT from 4002 to 4004 if using IB Gateway from docker-compose (Step 6)
  5. run command yarn build to compile TypeScript code
  6. run command docker-compose up (use flag -d to run de-attached mode in background). Now the docker instance of IB Gateway should be running.
  7. to take the container down just run docker-compose down

Once docker is up and running with correct credentials it should be ready to accept connections.

Running jest test

Tests can be run from CLI with jest tool. Either a single one or multiple tests at once.

Running single/multiple tests

jest src/test/unit/api/api.test.ts

To run multiple, just use path instead of specific file.

To run all tests run the following command.

yarn test

CI

Will be added later once it's stable

Deprecation process

Public interfaces, that are planned to be removed, will be marked with a @deprecated.
The @deprecated tag will contain a description or link on how migrate to new API (example: IBApiCreationOptions.clientId).
VSCode will explicitly mark deprecated functions and attributes, so you cannot miss it.

If you write new code, don't use deprecated functions.
If you already use deprecated functions on existing code, migrate to new function on your next code-clean up session. There is no need for immediate change, the deprecated function will continue to work for a least a half more year, but at some point it will be removed.

How to contribute

IB does regularly release new API versions, so this library will need permanent maintenance in order to stay up-to-date with latest TWS features.
Also, there is not much testing code yet. Ideally there should be at least one test-case for each public function.
In addition to that, a little demo / example app would be nice, to demonstrate API usage (something like a little live-portoflio-viewer app for node.js console?).
Any kind of bugfixes are welcome as well.

If you want to contribute, read the Developer Guide and start coding.