class operation_history_object : public abstract_object<operation_history_object>
   {
         operation         op;
         operation_result  result;
         /** the block that caused this operation */
         uint32_t          block_num = 0;
         /** the transaction in the block */
         uint16_t          trx_in_block = 0;
         /** the operation within the transaction */
         uint16_t          op_in_trx = 0;
         /** any virtual operations implied by operation in block */
         uint32_t          virtual_op = 0;
         /** Whether this is a virtual operation */
         bool              is_virtual = false;
         /** The timestamp of the block that caused this operation */
         time_point_sec    block_time;
   };