## Getting ABIs from an Explorer We can use the Mox explorer functionality to retrieve ABIs. Mox has a built-in explorer functionality. If we type: ```bash mox explorer ``` we'll get a list of commands we can run. As of now, the only explorer supported is Etherscan. We can fetch ABIs from Etherscan and save them locally. In our `mocassin.toml` file, at the top of our `project` field, we can assign ABIs to our contracts. For example: ```toml [project] save_abi_path = "abis" ``` We'll make a new folder called `abis`: ```bash mkdir abis ``` Then, we can get the ABI for WETH using the following command: ```bash mox explorer get 0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2 --save --name weth ``` Moccasin will default to Etherscan and retrieve the ABI for WETH, saving it as `weth.json` in the `abis` folder. We can then assign that ABI to the WETH contract. In our `mocassin.toml` file, in the `networks.eth-forked.contracts` field, we can add the following: ```toml weth = { abi = "abis/weth.json" } ``` We can then call functions on the WETH contract. We can also give ourselves a starting WETH balance in our `setup_script.py` file. First, we'll define a variable: ```python STARTING_WETH_BALANCE = int(1e18) ``` Next, we'll define a function called `add_token_balance` that we can use to give ourselves a starting balance of a token, in this case WETH: ```python def add_token_balance(usdc, weth, active_network): print(f"Starting balance of WETH: {weth.balance_of(boa.env.eoa)}") weth.deposit(value=STARTING_WETH_BALANCE) print(f"Ending balance of WETH: {weth.balance_of(boa.env.eoa)}") ``` This will mint us some fake WETH. We can then call this function in our `setup_script` function: ```python def setup_script() -> Tuple[ABIContract, ABIContract, ABIContract, ABIContract]: print("Starting setup script...") usdc = active_network.manifest(named="usdc") weth = active_network.manifest(named="weth") if active_network.is_local() or active_network.forked(): add_token_balance(usdc, weth, active_network) ``` Finally, we'll call `setup_script` in our `mocassin_main` function: ```python def mocassin_main(): setup_script() ``` We'll ensure we have our network set to `eth-forked` in our `mocassin.toml` file: ```toml [networks.eth-forked] forked = true ``` Then we can run our script with the following command: ```bash mox run setup_script --network eth-forked ``` This will successfully mint us some WETH.