lighter-v2-python 1.0.0

lighter Python rest api and blockchain interactions for Limit Orders

Lighter

Python client for Lighter (v2). The sdk is tested against Python versions 3.9, 3.10 and 3.11.

Installation

pip install lighter-v2-python

Getting Started

The Client object has four main modules;

• Api: allows interaction with the lighter api
• AsyncApi: allows for async interaction with the lighter api
• Blockchain: allows interaction with lighter contracts
• AsyncBlockchain: allows async interaction with lighter contracts

Client can be created with private key or not depending on whether you are going to use the api or interact with the contracts. For more complete examples, see the examples directory.

API

Following parameters are required to use Api module:

• api_auth: You should get the key from our servers.
• web3_provider_url: You need a node to interact with the contract. We suggest alchemy which provides 300M free compute units monthly, You can register and get your keys here

from lighter.lighter_client import Client
import os
from lighter.modules.blockchain import OrderSide
from lighter.constants import ORDERBOOK_WETH_USDC

api_auth = os.environ.get("API_AUTH")

# You don't need to provide private key if you only want to use the api module.

client = Client(api_auth=api_auth, web3_provider_url="ALCHEMY_URL")

# Let's get available blockchains and their details from the api module.
blockchains = client.api.get_blockchains().data

Blockchain

Following parameters are required to use Blockchain module:

• api_auth: You should get the key from our servers.
• private_key: You need to provide your wallet private key to sign your transactions.
• web3_provider_url: You need a node to interact with the contract. We suggest alchemy which provides 300M free compute units monthly, You can register and get your keys here

Blockchain module enables you to do multiple operations in one transaction. The number of operations is limited to 4 million gas. So the limits are roughly;

• 25 order creations in one transaction
• 100 order cancellations in one transaction
• 25 order updates in one transaction

from lighter.lighter_client import Client
import os
from lighter.modules.blockchain import OrderSide
from lighter.constants import ORDERBOOK_WETH_USDC


private_key = os.environ.get("SOURCE_PRIVATE_KEY")
api_auth = os.environ.get("API_AUTH")


client = Client(
    private_key=private_key, api_auth=api_auth, web3_provider_url="ALCHEMY_URL"
)


x = client.blockchain  # initialize the blockchain module before using it


# You need to give allowance for the trading tokens
client.blockchain.set_token_max_allowance(
    spender=client.blockchain.router_contract.address, token="WETH"
)

client.blockchain.set_token_max_allowance(
    spender=client.blockchain.router_contract.address, token="USDC"
)


# Let's create a batch of limit orders
sizes = ["0.001", "0.001", "0.001"]
prices = ["1050", "1200", "1000"]
sides = [OrderSide.BUY, OrderSide.SELL, OrderSide.BUY]


tx_hash = client.blockchain.create_limit_order_batch("WETH_USDC", sizes, prices, sides)

# if you want to wait for the transaction to be mined and get order id and other details,
# you can use the following method.
# alternatively you can wait the data from websocket
result = client.blockchain.get_create_order_transaction_result(tx_hash, "WETH_USDC")

Async Examples

from lighter.lighter_client import Client
import os
from lighter.modules.blockchain import OrderSide
from lighter.constants import ORDERBOOK_WETH_USDC


private_key = os.environ.get("SOURCE_PRIVATE_KEY")
api_auth = os.environ.get("API_AUTH")


client = Client(
    private_key=private_key, api_auth=api_auth, web3_provider_url="ALCHEMY_URL"
)


async def main():
    client.async_blockchain # to initialize the module
    sizes = ["0.0001"]
    prices = ["1000"]
    sides = [OrderSide.SELL]

    # Test async api
    print(await client.async_api.get_blockchains())
    print(await client.async_api.get_orderbook("WETH_USDC"))

    print(
        client.api.get_candles(
            orderbook_symbol="WETH_USDC",
            resolution=60,
            timestamp_start=int(time.time()) - 60 * 60 * 60 * 24,
            timestamp_end=int(time.time()),
        )
    )

    tx_hash = await client.async_blockchain.create_limit_order_batch(
        "WETH_USDC", sizes, prices, sides
    )
    # tx_hash = await client.async_blockchain.cancel_limit_order_batch(
    #     "WETH_USDC", [24989]
    # )
    # tx_hash = await client.async_blockchain.update_limit_order_batch(
    #     "WETH_USDC", [24991], ["0.0001"], ["100"], [OrderSide.BUY]
    # )
    # tx_hash = await client.async_blockchain.create_market_order(
    #     "WETH_USDC", "0.0001", "100", OrderSide.SELL
    # )

    result = await client.async_blockchain.get_create_order_transaction_result(
        tx_hash, "WETH_USDC"
    )
    # result = await client.async_blockchain.get_limit_order_canceled_transaction_result(
    #     tx_hash, "WETH_USDC"
    # )
    # result = await client.async_blockchain.get_update_limit_order_transaction_result(
    #     tx_hash, "WETH_USDC"
    # )
    print(result)

    # close the aiohtpp session
    await client.async_api.close_connection()


if __name__ == "__main__":
    import asyncio

    loop = asyncio.get_event_loop()
    loop.run_until_complete(main())