* Core - root application structure */

Core Transaction Copyright © 2017-2018 Eduard Sesigin. All rights reserved. Contacts: <claygod@yandex.ru> * Transaction - preparation and execution of

* account - keeps a balance. Account balance can not be less than zero. The counter has two tasks: counts the number of operations performed stops

* logger - prints error messages to the console */

* request - single operation data */

* section - provides access to units. Frequent operations to get a unit are executed in the read/unlocked mode. Rare operations of adding and removing

* storage - provides access to sections with units. The storage is executed as an array with maps to reduce the GC pauses. */

* unit - aggregates accounts. */