aisling-connector 1.10.0

This is a lightweight library that works as a connector to Binance public API.

Binance Public API Connector Python

This is a lightweight library that works as a connector to Binance public API

• Supported APIs:
  • /api/*
  • /sapi/*
  • Spot Websocket Market Stream
  • Spot User Data Stream
• Inclusion of test cases and examples
• Customizable base URL, request timeout and HTTP proxy
• Response metadata can be displayed

Installation

pip install binance-connector

Documentation

https://binance-connector.readthedocs.io

RESTful APIs

Usage examples:

from binance.spot import Spot 

client = Spot()
print(client.time())

client = Spot(key='<api_key>', secret='<api_secret>')

# Get account information
print(client.account())

# Post a new order
params = {
    'symbol': 'BTCUSDT',
    'side': 'SELL',
    'type': 'LIMIT',
    'timeInForce': 'GTC',
    'quantity': 0.002,
    'price': 9500
}

response = client.new_order(**params)
print(response)

Please find examples folder to check for more endpoints.

Testnet

Spot Testnet is available, it can be used to test /api/* endpoints.

• /sapi/* endpoints are not available.
• No UI.
• Steps to setup testnet API key. https://dev.binance.vision/t/99

To use testnet:

from binance.spot import Spot as Client

client = Client(base_url='https://testnet.binance.vision')
print(client.time())

Base URL

If base_url is not provided, it defaults to api.binance.com.
It's recommended to pass in the base_url parameter, even in production as Binance provides alternative URLs in case of performance issues:

• https://api1.binance.com
• https://api2.binance.com
• https://api3.binance.com

Optional parameters

PEP8 suggests lowercase with words separated by underscores, but for this connector, the methods' optional parameters should follow their exact naming as in the API documentation.

# Recognised parameter name
response = client.cancel_oco_order('BTCUSDT', orderListId=1)

# Unrecognised parameter name
response = client.cancel_oco_order('BTCUSDT', order_list_id=1)

RecvWindow parameter

Additional parameter recvWindow is available for endpoints requiring signature.
It defaults to 5000 (milliseconds) and can be any value lower than 60000(milliseconds). Anything beyond the limit will result in an error response from Binance server.

from binance.spot import Spot as Client

client = Client(key, secret)
response = client.get_order('BTCUSDT', orderId=11, recvWindow=10000)

Timeout

timeout is available to be assigned with the number of seconds you find most appropriate to wait for a server response.
Please remember the value as it won't be shown in error message no bytes have been received on the underlying socket for timeout seconds.
By default, timeout is None. Hence, requests do not time out.

from binance.spot import Spot as Client

client= Client(timeout=1)

Proxy

Proxy is supported.

from binance.spot import Spot as Client

proxies = { 'https': 'http://1.2.3.4:8080' }

client= Client(proxies=proxies)

Response Metadata

The Binance API server provides weight usages in the headers of each response. You can display them by initializing the client with show_limit_usage=True:

from binance.spot import Spot as Client

client = Client(show_limit_usage=True)
print(client.time())

returns:

{'data': {'serverTime': 1587990847650}, 'limit_usage': {'x-mbx-used-weight': '31', 'x-mbx-used-weight-1m': '31'}}

You can also display full response metadata to help in debugging:

client = Client(show_header=True)
print(client.time())

returns:

{'data': {'serverTime': 1587990847650}, 'header': {'Context-Type': 'application/json;charset=utf-8', ...}}

If ClientError is received, it'll display full response meta information.

Display logs

Setting the log level to DEBUG will log the request URL, payload and response text.

Error

There are 2 types of error returned from the library:

• binance.error.ClientError
  • This is thrown when server returns 4XX, it's an issue from client side.
  • It has 4 properties:
    • status_code - HTTP status code
    • error_code - Server's error code, e.g. -1102
    • error_message - Server's error message, e.g. Unknown order sent.
    • header - Full response header.
• binance.error.ServerError
  • This is thrown when server returns 5XX, it's an issue from server side.

Websocket

from binance.websocket.spot.websocket_client import SpotWebsocketClient as WebsocketClient

def message_handler(message):
    print(message)

ws_client = WebsocketClient()
ws_client.start()

ws_client.mini_ticker(
    symbol='bnbusdt',
    id=1,
    callback=message_handler,
)

# Combine selected streams
ws_client.instant_subscribe(
    stream=['bnbusdt@bookTicker', 'ethusdt@bookTicker'],
    callback=message_handler,
)

ws_client.stop()

More websocket examples are available in the examples folder

Heartbeat

Once connected, the websocket server sends a ping frame every 3 minutes and requires a response pong frame back within a 10 minutes period. This package handles the pong responses automatically.

Testnet

from binance.websocket.spot.websocket_client import SpotWebsocketClient as WebsocketClient

ws_client = WebsocketClient(stream_url='wss://testnet.binance.vision')

Test Case

# In case packages are not installed yet
pip install -r requirements/requirements-test.txt

pytest

Limitation

Futures and Vanilla Options APIs are not supported:

• /fapi/*
• /dapi/*
• /vapi/*
• Associated Websocket Market and User Data Streams

Contributing

Contributions are welcome.
If you've found a bug within this project, please open an issue to discuss what you would like to change.
If it's an issue with the API, please open a topic at Binance Developer Community