@Override
  public long mStoreOperationGasCost(final MessageFrame frame, final long offset) {
    return clampedAdd(VERY_LOW_TIER_GAS_COST, memoryExpansionGasCost(frame, offset, 32));
  }
Returns the base gas cost for external code accesses.

@return the base gas cost for external code accesses
evm/src/main/java/org/hyperledger/besu/evm/gascalculator/FrontierGasCalculator.java