onebullex 1.0.0

A production-ready Python client for the OneBullEx Exchange API

OneBullEx Python Client

A production-ready, typed, and robust Python client for the OneBullEx Exchange API.

Designed for trading systems and quantitative infrastructure, offering:

• Clean Architecture: Strict separation of transport, authentication, and business logic.
• Robustness: Connection pooling, exponential backoff retries, and strict timeouts.
• Type Safety: Pydantic models for all major interactions.
• Safety: Proactive rate limiting and idempotent-aware retry logic.

Installation

pip install requests pydantic
pip install -e .

Quick Start

Public Data

from onebullex import OneBullExClient

# Initialize (defaults to PROD environment)
client = OneBullExClient()

# Get Market Summary
summary = client.market.summary()
print(summary)

# Get Orderbook
depth = client.market.orderbook("BTCUSDT")
print(f"Best Bid: {depth['bids'][0]}")

Authenticated Trading

from onebullex import OneBullExClient
from onebullex.models.orders import PlaceSpotOrder, OrderSide, OrderType

client = OneBullExClient(
    api_key="YOUR_API_KEY",
    secret="YOUR_SECRET",
    identify="YOUR_IDENTIFY_CODE"
)

# Place a Limit Order
order = PlaceSpotOrder(
    symbol="BTCUSDT",
    side=OrderSide.BUY,
    orderType=OrderType.LIMIT,
    price="45000.0",
    quantity="0.001"
)

try:
    response = client.orders.place(order)
    print(f"Order Placed: {response}")
except Exception as e:
    print(f"Trading Error: {e}")

Architecture

This client treats infrastructure as code:

• onebullex.transport: Low-level HTTP/WebSocket handling with requests.Session.
• onebullex.auth: Signer class for HMAC-SHA256 signatures with automatic server-time drift correction.
• onebullex.models: Pydantic models for request validation.
• onebullex.errors: Hierarchical exception mapping (e.g., specific InsufficientBalanceError vs generic ClientError).

Development

Run tests:

python -m unittest discover tests

Run verification script (Public API):

python examples/verify_rest_v2.py

License

MIT