Buttercoin API Node.js Client

Official Node.js Client of the Buttercoin API. Buttercoin is a trading platform that makes buying and selling bitcoin easy.

Getting Started

Use npm to install

npm install buttercoin-node

Examples

Initialization

For authenticated requests, the API client must use either a key/secret pair or an OAuth2 bearer token.

Common

Setting	Property Name	Description
Environment	environment	Your development environment (default: 'production', set to 'sandbox' to test with testnet bitcoins). You can set this to an object with host, protocol (defaults to 'https'), port (defaults to empty), and headers (defaults to []) for custom endpoints.
API Version	version	The API Version. Currently used to version the API URL and Service Description

Key/Secret

Setting	Property Name	Description
Key	key	Your Buttercoin API Key
Secret	secret	Your Buttercoin API Secret

// Configure Buttercoin client instance.  Only apiKey and apiSecret are required.
// The environment parameter defaults to the sandbox environment.
// The version parameter defaults to the latest version as of this release, 'v1'

var Buttercoin = require('buttercoin-node');
var API_KEY = // the Key ...
var API_SECRET = // the Secret ...
var env = Buttercoin.Environment.production;
var client = Buttercoin.withKeySecret(API_KEY, API_SECRET, environment, 'v1');

OAuth2

Setting	Property Name	Description
Token Provider	tokenProvider	A function which take some credential evidence (e.g. a user session id) and maps it to a bearer token string

// Only tokenProvider is required, environment and version default as above

var Buttercoin = require('buttercoin-node');
function tokenProvider(evidence) { /* lookup bearer tokens... */ }
var client = Buttercoin.withOAuth2(tokenProvider);

Conventions

Promises

All API calls produce a Q promise. We may support callback or event style interfaces if there's interest.

Timestamps

For the timestamp option sent to all key/secret client methods: This option must always be increasing, and within 5 minutes of Buttercoin server times (GMT). This is to prevent replay attacks on your data.

Because of this, if you need your API calls to run in a certain order, you must chain together callbacks to ensure synchronous responses to your requests.

var timestamp = new Date().getTime();

Additionally, for convenience, if you don't include the timestamp option, it will default to the current time.

// API key/secret is configured on the client instance

// With explicit timestamp
client.getBalances({timestamp: new Date().getTime()});

// With automatic timestamp
client.getBalances()
  .then(/* do something ... */)
  .done();

Evidence

When using an OAuth2 client, you need to provide 'evidence' that can be used to derive a bearer token for a specific user.

Unlike in the case of timestamps, this must be passed to any method requiring authentication.

var sessionId = // a user session ID which can be used to lookup a bearer token
client.getBalances(sessionId)
  .then(/* do something ... */)
  .done();

Getting Data

Credential Permissions Returns a promise for an array of permissions associated with this API key or bearer token.

client.getPermissions();

Balances Returns a promise for an object. Each key indicates a currency code (currently 'USD' or 'BTC'. Each associated value is a number representing the amount of that currency available.

client.getBalances();

Deposit Address Returns a promise for a bitcoin address string which can be used to deposit bitcoins into this account.

client.getDepositAddress();

Get Orders Returns array of objects containing information about buy and sell orders

Name	Param	Description
Status	status	enum: ['opened', 'partial-filled', 'filled', 'canceled']
Side	side	enum: ['buy', 'sell']
Order Type	orderType	enum: ['market', 'limit']
Date Min	dateMin	format: ISO-8601, e.g. '2014-05-06T13:15:30Z'
Date Max	dateMax	format: ISO-8601, e.g. '2014-05-06T13:15:30Z'

// query for multiple orders
var orderParams = { side: 'sell' };
// the query parameter is optional and can be omitted for convenience to search all orders
client.getOrders(orderParams);

// single order by id
var orderId = '<order_id>';
client.getOrderById(orderId);

// single order by url
var url = '<url>';
client.getOrderByUrl(url);

Get Transactions Returns array of objects containing information about deposits and withdrawals.

Name	Param	Description
Status	status	enum: ['pending', 'processing', 'funded', 'canceled', 'failed']
Transaction Type	transactionType	enum: ['deposit', 'withdrawal']
Date Min	dateMin	format: ISO-8601, e.g. '2014-05-06T13:15:30Z'
Date Max	dateMax	format: ISO-8601, e.g. '2014-05-06T13:15:30Z'

// query for multiple transactions
var txParams = {};
// the query parameter is optional and can be omitted for convenience to search all trxns
client.getTransactions(txParams);

// single transaction by id
var txId = '53a22ce164f23e7301a4fee5';
client.getTransaction(txId);

// single transaction by url
var url = 'https://api.buttercoin.com/v1/transactions/53e539aa64f23ec123931c11';
client.getTransaction(url);

Unauthenticated Requests

Get Order Book Return an array of current orders in the Buttercoin order book

client.getOrderbook();

Get Ticker Return the current bid, ask, and last sell prices on the Buttercoin platform

client.getTicker();

Get Trade History Return the last 100 trades

client.getTradeHistory();

Create New Actions

*** Calls below this line are out of date *** Create Order

Valid order params include:

Name	Param	Description
Instrument	instrument	enum: ['BTC_USD, USD_BTC']
Side	side	enum: ['buy', 'sell'], required true
Order Type	orderType	enum: ['limit', 'market'], required true
Price	price	string, required false
Quantity	quantity	string, required false

// create a JSON object with the following params
var order = new client.Order({
  instrument: "BTC_USD",
  orderAction: "buy",
  orderType: "limit",
  price: "700.00"
  quantity: "5"
});

client.createOrder(order, new Date().getTime(), function (err, order) {
  console.log("create order err", err);
  console.log("create order", order);
});

Create Transaction

Please contact Buttercoin support before creating a USD deposit using the API

Deposit transaction params include:

Name	Param	Description
Method	method	enum: ['wire'], required true
Currency	currency	enum: ['USD'], required true
Amount	amount	string, required true

// create deposit
var trxnObj = {
  method: "wire",
  currency: "USD",
  amount: "5002"
};

client.createDeposit(trxnObj, new Date().getTime(), function (err, trxn) {
  console.log("create trxn err", err);
  console.log("create trxn", trxn);
});

Withdrawal transaction params include:

Name	Param	Description
Method	method	enum: ['check'], required true
Currency	currency	enum: ['USD'], required true
Amount	amount	string, required true

// create withdrawal
var trxnObj = {
  method: "check",
  currency: "USD",
  amount: "100"
};

client.createWithdrawal(trxnObj, new Date().getTime(), function (err, trxn) {
  console.log("create trxn err", err);
  console.log("create trxn", trxn);
});

Send bitcoin transaction params include:

Name	Param	Description
Currency	currency	['USD'], required true
Amount	amount	string, required true
Destination	destination	address to which to send currency string, required true

// send bitcoins to an address
var trxnObj = {
  currency: "BTC",
  amount: "100.231231",
  destination: "<bitcoin_address>"
};

client.sendBitcoin(trxnObj, new Date().getTime(), function (err, trxn) {
  console.log("create trxn err", err);
  console.log("create trxn", trxn);
});

Cancel Actions

All successful cancel calls to the API return a response status of 204 with a human readable success message

Cancel Order Cancel a pending buy or sell order

client.cancelOrder(orderId, new Date().getTime(), function (err, msg) {
  console.log("cancel order err", err);
  console.log("cancel order", msg);
});

Cancel Transaction Cancel a pending deposit or withdraw action

client.cancelTransaction(trxnId, new Date().getTime(), function (err, msg) {
  console.log("cancel trxn err", err);
  console.log("cancel trxn", msg);
});

Further Reading

Buttercoin - Website Buttercoin API Documentation

Contributing

This is an open source project and we love involvement from the community. Hit us up with pull requests and issues.

Release History

1.1.0

• Added support for using OAuth2 credentials
• Switched to returning promises instead of callback-passing

1.0.0

• Added the ability to connect to a custom endpoint instead of just staging or production

Prereleases

• Added trade history endpoint
• Changed test env to sandbox.buttercoin.com
• Made timestamp an optional parameter (will default to current timestamp)
• Made getOrders and getTransactions query params optional
• Fixed issue with self not defined
• Fixed issue with orderbook returning null
• Added support for unauthenticated requests
• Fixed README format and accuracy
• First release.

License

Licensed under the MIT license.