In the current version of StarkNet Alpha, fees are supported but optional.

• f a transaction is sent with max_fee greater than 0, the StarkNet OS will try to charge the account for this amount and the transaction will fail if it does not succeed.
• If a transaction is sent with max_fee equals 0, the StarkNet Os won’t charge fee for the transaction execution.

You can either choose to fund your account and use the fee mechanism, or to start without it and interact with the system by setting max_fee to 0 when sending transactions.

Deploying Your Account

Deploy an account in the hackathon environment you are working on, and copy the contract address:

export STARKNET_WALLET=starkware.starknet.wallets.open_zeppelin.OpenZeppelinAccount
starknet deploy_account

Funding Your Account

If you have some Goerli ETH on L1, you are welcome to follow the tutorial below.

If not, you can contact one of StarkWare’s staff and they will happily transfer some Goerli ETH to your account on StarkNet -

1. Copy the applicable ETH Bridge L1 Address from the Environment Parameters page and paste it into the Goerli Etherscan:
   • Navigate to the contract’s Contract tab and select Write as Proxy
   • Connect your L1 wallet with the Connect to Web3 button
   • select the deposit function
   • Enter the amount of Goerli ETH you would like to deposit, and paste the L2 address you will be depositing to:

1. To verify you have funded your account you can check the balanceOf function on the ETH Token L2 Contract for your account address. To run the command, download the ABI JSON file of the Cairo ERC20 contract:

   erc20_abi.json

   starknet call --address 0x28179321c34e2ca38beafa45d0526673fbb5f044b4f46a9bcbe78841edfbc41 \\
   	--abi erc20_abi.json \\
   	--function balanceOf \\
     --max_fee 0          \\
   	--inputs <ACCOUNT_ADDRESS>