Creating and Funding a Gnosis Safe

We create a Gnosis Safe with two owners and a threshold of 1. Such a setup provides private key redundancy, which is convenient in case you lose access to one account. A warning is warranted, however, as a hacker only needs to hack one account to drain your safe. You've been warned!

We create and fund the safe in Arbitrum, although the code should also work for Ethereum mainnet and other Ethereum L2 roll-ups.

The owner creating and funding the safe must have enough ETH in all target blockchains: Arbitrum Mainnet, Arbitrum Testnet and Arbitrum Fork. Funding the owner account is beyond the scope of this project.

After you are done with the Developer Setup, you can run the project on the forked network with:

workon gnosis_safe_env
brownie run scripts/create_and_fund.py

Developer Setup

• Create Python Environment
• Set your .env file
• Updating your Brownie networks config

Create Python Environment

To run this project you'll need ganache and brownie. For convenience, you can install the same python environment we used following the instructions below.

# Assumes that 'virtualenvwrapper' is properly installed.
#
# Create Python virtual environment
mkvirtualenv gnosis_safe_env
pip install -r requirements.txt --no-deps

Brownie v1.18.1 has a strict dependency on typing-extensions==4.0.1, which makes the package environment inconsistent if you install as instructed. Alternatively, you can git clone the eth-brownie project and install from there after making that dependency more flexible.

# shows that the environment is inconsistent as there is conflict of brownie with typing-extensions. This conflict should not affect functionality.
pip check

To activate the environment:

workon gnosis_safe_env

To deactivate:

deactivate

Make sure your IDE uses gnosis_safe_env to avoid confusing the linter. If you use Visual Code, you'll need to restart it for the environment to become available.

Set your .env file

Create .env at the project's root and include:

SAFE_OWNER_1=<OWNER1_ADDRESS>
SAFE_OWNER_2=<OWNER2_ADDRESS>

Updating your Brownie networks config

The following commands add the brownie network configurations needed:

brownie networks add Arbitrum arbitrum-main name=Mainnet host=https://arb1.arbitrum.io/rpc chainid=42161 explorer=https://api.arbiscan.io/api multicall2=0x5B5CFE992AdAC0C9D48E05854B2d91C73a003858

brownie networks add Arbitrum arbitrum-test name=Testnet host=https://rinkeby.arbitrum.io/rpc chainid=421611 explorer=https://testnet.arbiscan.io/api multicall2=0x5B5CFE992AdAC0C9D48E05854B2d91C73a003858

brownie networks add development arbitrum-main-fork name="Arbitrum Mainnet Fork" cmd=ganache-cli host=http://127.0.0.1 fork=arbitrum-main evm_version=istanbul mnemonic=brownie gas_limit=12000000 port=8545 accounts=10

# Check that the networks were succesfully declared:
brownie networks list