Skip to content
SKALE Docs

Managing sFUEL Distribution

The default gas token of a SKALE Chain is SKALE Fuel (sFUEL). This gas token allows for a SKALE Chains to be fully Ethereum Virtual Machine (EVM) compatible while also offering zero gas fees to developers and end-users. While gasless transactions are recommended for most applications due to simple management; SKALE Chains running with sFUEL active will need to ensure developers and/or end-users can access the gas token to execute transactions.

Etherbase

Section titled “Etherbase”

For SKALE Chain owners and operators, accessing sufficient sFUEL is critical. All SKALE Chains come predeployed with a smart contract called Etherbase which is important for two reasons:

  1. A large allocation of sFUEL is stored in this contract upon creation of the SKALE Chain, ensuring sufficient quantities are available for operators

  2. sFUEL when consuemd in a transaction is automatically recycled into Etherbase ensuring that a SKALE Chain doesn’t run out of gas

 // Using Ethers v6
import { Contract, JsonRpcProvider, Wallet, parseEther } from "ethers";


const ETHERBASE_ABI = [
  "function partiallyRetrieve(address payable receiver, uint256 amount) external",
];


const ETHERBASE_PREDEPLOYED_ADDRESS = "0xd2bA3e0000000000000000000000000000000000";


async function main() {
  const provider = new JsonRpcProvider("https://mainnet.skalenodes.com/v1/<schain-name>");
  const wallet = new Wallet(process.env.PRIVATE_KEY, provider);
  const contract = new Contract(ETHERBASE_PREDEPLOYED_ADDRESS, ETHERBASE_ABI, wallet);


  // Allow anyone to deploy
  const res = await contract.partiallyRetrieve(wallet.address, parseEther("25"));


  console.log("Res: ", res); // Transaction Hash, once confirmed wallet.address native balance increases by 25
}


main()
  .catch((err) => {
    console.error(err);
    process.exitCode = 1;
  });

sFUEL Station

Section titled “sFUEL Station”

SKALE Chains can request being added to the sFUEL Station. The sFUEL Station is currently availalable on SKALE Hub testnet and mainnet Chains: Calypso, Europa, Nebula, and Titan. The sFUEL Station allows users to put in their wallet and attain a small allocation of sFUEL to get started on a particular sChain.