protected long cost(final MessageFrame frame, final long memOffset, final long length) {
    return gasCalculator().getVeryLowTierGasCost()
        + gasCalculator().extCodeCopyOperationGasCost(frame, memOffset, length);
  }
Cost of data Copy operation.

@param frame the frame
@param memOffset the mem offset
@param length the length
@return the long
evm/src/main/java/org/hyperledger/besu/evm/operation/DataCopyOperation.java