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Optimism-Python: Unofficial Python Client for the OP-Stack

Warning

Reference SDK is still under active development so the repository might be temporarily out of date.

This library is a Python implementation of the OP-Stack SDK. It tries to mirror some of the core functionalities such as:

  • providing easy access to the OP-Stack contracts
  • bridging of assets from L1 to L2 (deposits) and vice-versa (withdrawls)
  • creating withdrawl proofs

Getting started

Installation

pip install optimism-python

Deposit ETH to L2

from web3 import Web3
from optimism import CrossChainMessenger
from optimism.types import Chains

# Create a node provider for each chain
provider_l1 = Web3(Web3.HTTPProvider("https://eth-mainnet.g.alchemy.com/v2/<your-alchemy-key>"))
provider_l2 = Web3(Web3.HTTPProvider("https://optimism-mainnet.g.alchemy.com/v2/<your-alchemy-key>"))

# Specify an account for each chain (can be the same)
account_l1 = provider_l1.eth.account.from_key("<your-private-key>")
account_l2 = provider_l2.eth.account.from_key("<your-private-key>")

# Create a messenger instance
messenger = CrossChainMessenger(chain_l1=Chains.ETHEREUM_MAINNET,
                                chain_l2=Chains.OPTIMISM_MAINNET,
                                account_l1=account_l1, 
                                account_l2=account_l2,
                                provider_l1=provider_l1,
                                provider_l2=provider_l2)

# Deposit 1 ETH to L2
messenger.deposit_eth(10**18)