protected long cost(final boolean accountIsWarm) {
    return gasCalculator().getBalanceOperationGasCost()
        + (accountIsWarm
            ? gasCalculator().getWarmStorageReadCost()
            : gasCalculator().getColdAccountAccessCost());
  }
Gets Balance operation Gas Cost plus warm storage read cost or cold account access cost.

@param accountIsWarm true to add warm storage read cost, false to add cold account access cost
@return the long
evm/src/main/java/org/hyperledger/besu/evm/operation/BalanceOperation.java