protected long contractCreationCost(final int ignored) {
    return txCreateExtraGasCost();
  }
Returns the gas cost for contract creation transactions

@param ignored the size of the contract creation code (ignored in Frontier)
@return the gas cost for contract creation transactions
evm/src/main/java/org/hyperledger/besu/evm/gascalculator/FrontierGasCalculator.java