externu256constc_createGas;///< Once per CREATE operation & contract-creation transaction.
externu256constc_callGas;///< Once per CALL operation & message call transaction.
externu256constc_memoryGas;///< Times the address of the (highest referenced byte in memory + 1). NOTE: referencing happens on read, write and in instructions such as RETURN and CALL.
externu256constc_logDataGas;///< Per byte in a LOG* operation's data.
externu256constc_logTopicGas;///< Multiplied by the * of the LOG*, per LOG transaction. e.g. LOG0 incurs 0 * c_txLogTopicGas, LOG4 incurs 4 * c_txLogTopicGas.