Changelog

Track all notable changes, updates, and improvements to the Ostium Python SDK in our Changelog.

Ostium Python SDK

A python based SDK developed for interacting with Ostium v1 Trading Platform (https://ostium.app/)

Ostium is a decentralized perpetuals exchange on Arbitrum (Ethereum L2) with a focus on providing a seamless experience for traders for trading currencies, commodities, indices, crypto and more.

This SDK is designed to be used by developers who want to build applications on top of Ostium and automate their trading strategies.

Supported Operations

Basically you can perfrom any operation that is supported by the Ostium's web site in a programmatic way, via the SDK:

• Get list of feeds and their details
• Create a Trade/Order
• Close a Trade, Set Take Profit, Set Stop Loss
• Cancel an Order, Set Take Profit, Set Stop Loss, Set Entry Price
• Read Open Trades aka Positions
• Read Open Orders (Limit, Stop)
• Read Order History along with their details such as Pnl, etc.
• Get latest price of a feed
• Calculate fees such as funding rate, rollover fee, etc.
• Call testnet faucet to get testnet USDC tokens
• Read balance of your account, usdc and native token

To use the SDK you need to have a valid EVM private key for an account on either Arbitrum (mainnet) or Arbitrum Sepolia (testnet), depending on which network you plan to use and supply a RPC URL, see below for more details.

Installation

The SDK can be installed via pip:

pip install ostium-python-sdk

Running Tests

First, install the package with development dependencies:

pip install -e ".[dev]"

Then run the tests:

pytest

Requirements

Developed using:

  python=3.8

SDK Instantiation

You can instantiate the SDK with the following parameters. Ostium Platform is deployed on Arbitrum. You can use the testnet or mainnet config via the NetworkConfig class, see below for an example.

from dotenv import load_dotenv
from ostium_python_sdk import OstiumSDK, NetworkConfig

# Load environment variables if using .env file
load_dotenv()

# Get private key from environment variable 
private_key = os.getenv('PRIVATE_KEY')
if not private_key:
    raise ValueError("PRIVATE_KEY not found in .env file")

rpc_url = os.getenv('RPC_URL')
if not rpc_url:
    raise ValueError("RPC_URL not found in .env file")

# Initialize SDK
configTestnet = NetworkConfig.testnet()
sdk = OstiumSDK(configTestnet, private_key)

# NOTE: When you are ready to go live, you can switch to mainnet usage as simple as specifying the below init code:
# configMainnet = NetworkConfig.mainnet()
# sdk = OstiumSDK(configMainnet, private_key)
#

NOTE: create a .env file with PRIVATE_KEY and RPC_URL to use the SDK. An RPC URL is required to use the SDK. You can get one by signing up for a free account at https://www.alchemy.com/ and creating an app.

NOTE: You can also use the SDK without providing a private key, in which case you will be limited to read only operations on the SDK.

PRIVATE_KEY=your_private_key_here
RPC_URL=https://arb-sepolia.g.alchemy.com/v2/...
#RPC_URL="https://arb-mainnet.g.alchemy.com/v2/...",

your_private_key_here should be a valid EVM private key for an account on either Arbitrum (mainnet) or Arbitrum Sepolia (testnet), depending on which network you plan to use.

Make sure to save it in a secure location, and that the .env file is not shared with anyone or committed to a public repository (make sure you add it to .gitignore if you are pushing your code).

Testnet and Fuacet to get USDC tokens

As you can see above, we show use case on testnet. In order to use Ostium on testnet, aka on Arbitrum Sepolia, you need to get testnet USDC tokens. You can do this by using the faucet which is also available on the SDK once instantiated in testnet config.

# Get current token amount from faucet
# On testnet
sdk = OstiumSDK(NetworkConfig.testnet(), private_key)

# Check if tokens can be requested
if sdk.faucet.can_request_tokens(address):
    # Get amount that will be received
    amount = sdk.faucet.get_token_amount()
    print(f"Will receive {amount} tokens")
    
    # Request tokens
    receipt = sdk.faucet.request_tokens()
    print(f"Tokens requested successfully! TX: {receipt['transactionHash'].hex()}")
else:
    next_time = sdk.faucet.get_next_request_time(address)
    print(f"Cannot request tokens yet. Next request allowed at: {next_time}")

NOTE: You will also need gas aka ethereum or native token on Arbitrum Sepolia to even be able to request USDC tokens from the faucet or perform any write blockchain operation. You can get some native token for Arbitrum Sepolia for free at: https://www.alchemy.com/faucets/arbitrum-sepolia (or search for "arbitrum sepolia faucet")

The SDK contains the following classes:

• OstiumSDK: The main class for interacting with the Ostium Platform.

• NetworkConfig: The class for configuring the network.

• Balance: The class for interacting with the account, fetching balance, etc. available via sdk.balance.

• SubgraphClient: The class for interacting with the subgraph, getting pair details, open trades, open orders,etc. available via sdk.subgraph.

• Price: The class for interacting with the price, fetching latest price, etc. available via sdk.price

• Ostium: The class for interacting with the Ostium Smart contracts, opening trades, updating take profit and stop loss, closing trades, opening orders, etc. available via sdk.ostium.

• Faucet: The class for interacting with the Faucet for getting testnet USDC tokens. available via sdk.faucet.

Basic Usage

The intraction with Ostium platform is denoted with pair_id and trade_index.

• pair_id: The id of the pair, available via sdk.subgraph.get_pairs()
• trade_index: The index of the trade for this trader on the pair, available via sdk.subgraph.get_open_trades()

List of available pairs (Mainnet)

• As of January 2025, the following pairs are available on the mainnet:

ID	Trading Pair	Description
0	BTC-USD	Bitcoin
1	ETH-USD	Ethereum
2	EUR-USD	Euro
3	GBP-USD	British Pound
4	USD-JPY	US Dollar to Japanese Yen
5	XAU-USD	Gold
6	HG-USD	Copper
7	CL-USD	Crude Oil
8	XAG-USD	Silver
9	SOL-USD	Solana
10	SPX-USD	S&P 500 Index

Usage Examples

Reading available pairs / feeds

from ostium_python_sdk import OstiumSDK
from dotenv import load_dotenv

# Load environment variables if using .env file
load_dotenv()

# Get private key from environment variable
private_key = os.getenv('PRIVATE_KEY')
if not private_key:
    raise ValueError("PRIVATE_KEY not found in .env file")

rpc_url = os.getenv('RPC_URL')
if not rpc_url:
    raise ValueError("RPC_URL not found in .env file")

# Initialize SDK
config = NetworkConfig.testnet()
sdk = OstiumSDK(config, private_key)

# Or, initialize:
#
# (1) mainnet:
#
# config = NetworkConfig.mainnet()
# sdk = OstiumSDK(config, private_key)
# 
# (2) with explicit private key & rpc url, i.e: not read from env variables
# sdk = OstiumSDK(
#     network="arbitrum",
#     private_key="your_private_key_here",
#     rpc_url="https://arb1.arbitrum.io/rpc"
# )

# Get all available pairs
pairs = await sdk.subgraph.get_pairs()

print("\nPair Information:")
print("----------------------------------------")

for pair in pairs:
    # Get detailed information for each pair from the Graph API
    pair_details = await sdk.subgraph.get_pair_details(pair['id'])
    print("\nPair Details:")
    print("----------------------------------------")
    # Print all available fields in pair_details
    for key, value in pair_details.items():
        print(f"{key}: {value}")
    print("----------------------------------------")

Opening a Trade, Reading Open Trades, Setting TP and SL, Closing a Trade

# Define trade parameters
trade_params = {
    'collateral': 100,        # USDC amount
    'leverage': 10,           # Leverage multiplier
    'asset_type': 0,          # 0 for BTC, see pair_details above for other asset types 
    'direction': True,        # True for Long, False for Short
    'order_type': 'MARKET'    # 'MARKET', 'LIMIT', or 'STOP'
}

try:
  sdk.ostium.set_slippage_percentage(1)
  print(f"Slippage percentage set to: {sdk.ostium.get_slippage_percentage()}%")

  # Get latest price for BTC
  latest_price, _ = await sdk.price.get_price("BTC", "USD")
  print(f"Latest price: {latest_price}")
  # Execute trade at current market price
  receipt = sdk.ostium.perform_trade(trade_params, at_price=latest_price)
  print(f"Trade successful! Transaction hash: {receipt['transactionHash'].hex()}")

  # Wait for the transaction to be confirmed
  await asyncio.sleep(10)

  # Get public address from private key
  account = Account.from_key(private_key)
  trader_public_address = account.address

  # Get the trade details
  open_trades = await sdk.subgraph.get_open_trades(trader_public_address)
  for trade_index, trade_data in enumerate(open_trades):
      print(f"Trade {trade_index + 1}: {trade_data}\n")

  if len(open_trades) == 0:
      print(
          "No open trades found. Maybe the trade failed? enough USDC and ETH in the account?")
  else:
      opened_trade = open_trades[len(open_trades) - 1]
      print(f"Opened trade: {opened_trade}\n")

      sdk.ostium.update_tp(
          opened_trade['pair']['id'], opened_trade['index'], latest_price * 1.02)
      print(f"Trade Take Profit set to 2% above the current price!\n")

      await asyncio.sleep(10)

      sdk.ostium.update_sl(
          opened_trade['pair']['id'], opened_trade['index'], latest_price * 0.99)
      print(f"Trade Stop Loss set to 1% below the current price!\n")

      await asyncio.sleep(10)

      receipt = sdk.ostium.close_trade(
          opened_trade['pair']['id'], opened_trade['index'])
      print(
          f"Closed trade! Transaction hash: {receipt['transactionHash'].hex()}\n")

except Exception as e:
  print(f"Trade failed: {str(e)}")

Create a Short ETH Limit Order

This example shows how to create a short ETH limit order, 10% above the current ETHUSD price. So if price goes up 10% we order a Short ETH trade.

# Get private key from environment variable
private_key = os.getenv('PRIVATE_KEY')
if not private_key:
    raise ValueError("PRIVATE_KEY not found in .env file")

rpc_url = os.getenv('RPC_URL')
if not rpc_url:
    raise ValueError("RPC_URL not found in .env file")

# Initialize SDK
config = NetworkConfig.testnet()
sdk = OstiumSDK(config, private_key)

# Define trade parameters
order_params = {
    'collateral': 10,         # USDC amount
    'leverage': 50,           # Leverage multiplier
    'asset_type': 1,          # 1 for ETH
    'direction': False,       # True for Long, False for Short
    'order_type': 'LIMIT'     # 'MARKET', 'LIMIT', or 'STOP'
}

try:
    # Get latest price for ETH
    latest_price, _ = await sdk.price.get_price("ETH", "USD")
    print(f"Latest price: {latest_price}")
    # Execute LIMIT trade order at 10% above the current price
    receipt = sdk.ostium.perform_trade(order_params, at_price=latest_price * 1.1)
    print(
        f"Order successful! Transaction hash: {receipt['transactionHash'].hex()}")

    # Wait for the order to be confirmed
    await asyncio.sleep(10)

    # Get public address from private key
    account = Account.from_key(private_key)
    trader_public_address = account.address

    # Get the order details
    open_orders = await sdk.subgraph.get_orders(trader_public_address)
    for order_index, order_data in enumerate(open_orders):
        print(f"Order {order_index + 1}: {order_data}\n")

    if len(open_orders) == 0:
        print(
            "No open order found. Maybe the order failed? enough USDC and ETH in the account?")
    else:
        opened_order = open_orders[len(open_orders) - 1]
        print(f"Opened order: {opened_order}\n")

except Exception as e:
    print(f"Order failed: {str(e)}")

NOTE: Similiarly you can create a Stop order, just use 'STOP' as the order_type and make sure at_price is set to an acceptable stop loss price.

Add Colateral

Added in version 0.1.2

Add control of Slippage - Not only default 2%

Added in version 0.1.25

Remove Colleteral - Add when Audit is done

TBD

Tp / Sl - explain not specifying what means - 900 % for TP max and SL meaning

TBD

Maybe take or Make sure we have the error mapping from code to string errro msgs.

TBD

Funding rate calculation - SDK to get breakdown of FF, RF, PnL, etc.

TBD

Example Usage Scripts

More examples can be found in the examples folder.

Get Testnet USDC from Faucet

To get testnet USDC tokens (only available on Arbitrum Sepolia testnet):

python examples/example-faucet-request.py

See example-faucet-request.py for an example of how to use the faucet to get testnet USDC tokens.

Read Block Number

To run the example:

python examples/example-read-block-number.py

See example-read-block-number.py for an example of how to use the SDK.

Read Positions

To run the example:

python examples/example-read-positions.py

See example-read-positions.py for an example of how to use the SDK.

Get Feed Prices

To open a trade you need the latest feed price.

See this example script on how to get the latest feed prices.

python examples/example-get-prices.py

See example-get-prices.py for an example of how to use the SDK.

Get Balance of an Address

See this example script on how to get the latest feed prices.

python examples/example-get-balance.py

See example-get-balance.py for an example of how to use the SDK.

Run an example from local install

 pip uninstall ostium-python-sdk  &&  pip install -e .  &&  python examples/example-pairs-details.py