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Большая фича без бесконечных переделок: Spec driven development с AI, UML, C4 и OpenAPI

Разработка большой фичи с нуля часто начинается обманчиво легко. Заказчик объяснил идею, команда обсудила экраны, разработчики примерно представляют архитектуру. Можно приступать. Но стоит перейти от общего замысла к конкретному поведению, как появляются вопросы, на которые у каждого участника свой ответ.

Возьмём веб-систему бронирования общего оборудования. Сотрудник выбирает проектор и время, подтверждает бронь, при необходимости отменяет её. Звучит как несколько форм и CRUD. Иллюзия простоты исчезает, когда два человека одновременно бронируют один проектор, временный резерв зависает навсегда, а отменённая заявка продолжает занимать время в календаре.

Разберём, как пройти путь от такой идеи до реализации через LLM: сначала сделать правила видимыми, затем согласовать модель и контракты, после этого передавать агенту небольшие задачи.

Между бесконечными встречами и преждевременным кодом

Первый способ справиться с неопределённостью, это больше разговаривать. На встрече всё выглядит понятным: «резервируем на некоторое время», «не допускаем двойной брони», «после отмены освобождаем». На следующем обсуждении выясняется, что один участник понимал под резервом десять минут, второй — весь выбранный интервал, а третий считал, что занятость проверяется только при подтверждении.

Команда снова собирается, уточняет термины, договаривается. Так можно потратить часы и дни: разговоры создают ощущение прогресса. Проблема начинается, когда результат не превращается в описание, которое можно проверить целиком.

Другая крайность — быстрее написать код, чтобы было что обсуждать. Здесь тоже есть понятная логика: работающий экран конкретнее разговора. Однако предположения уже становятся таблицами, обработчиками, клиентскими моделями и тестами. Когда выясняется, что временный резерв должен блокировать оборудование сразу, менять приходится несколько связанных частей. Чем больше реализации построено на неверном предположении, тем дороже исправление и шире область возможных ошибок.

Качественная шкала: от простых, но неоднозначных разговоров к точным изменениям в коде; модели, диаграммы и контракты выделены в середине

*Рисунок 1.Точность описания растёт вместе с трудоёмкостью его подготовки и изменения. *

Код наиболее однозначно задаёт исполняемые инструкции. Но можно реализовать неправильное поведение.

Между разговором и реализацией есть удобная область: модель данных, диаграммы поведения и контракты интерфейсов. Они уже вынуждают ответить на неудобные вопросы, но изменить переход состояния или связи сущностей обычно проще, чем переделать затронутую ими функциональность. В этой статье именно такой подход будем называть Spec driven development: реализация опирается на согласованное описание решения.

Маршрут от идеи до реализации

Процесс разработки: обсуждения, заметки, требования, ERD, Use Case, C4 Context и Container, State Machine, Sequence, Activity, OpenAPI, Markdown-спецификация, BDD, код и тесты

Рисунок 2. Основное проектное внимание приходится на середину маршрута. LLM помогает на всех этапах; человек проверяет смысл и принимает решения.

Для примера договоримся, что резерв живёт десять минут, после чего его нельзя подтвердить. Подтверждённая бронь и действующий резерв занимают выбранный интервал. Отмена освобождает его. Оплату, выдачу и возврат оборудования оставим за границами фичи.

Схема задаёт порядок уточнения, а не запрет возвращаться назад. Обнаруженный в Sequence конфликт может потребовать изменить требование. Тогда обновляем связанные артефакты до реализации зависимого шага. Также не нужно описывать весь будущий продукт: сначала проходим маршрут для одного законченного сценария.

1. Встречи и обсуждения: выясняем, что вообще строим

Начинаем с людей, которым нужна фича. Какая проблема возникает сейчас? Кто бронирует оборудование? Что пользователь должен получить после подтверждения? Какие ситуации считаются недопустимыми? Здесь полезны конкретные истории: «два сотрудника пришли за одним проектором», «человек открыл форму и ушёл, оборудование осталось занятым».

В нашем примере нужно выяснить момент блокировки, срок резерва, смысл отмены и поведение при конкуренции запросов. Отдельно уточняем границы: бронируем конкретный проектор с инвентарным номером, а не произвольную единицу из категории.

LLM может заранее составить вопросы, сгруппировать противоречивые пожелания, предложить пограничные ситуации. Но ответ «пользователь, вероятно, ожидает десять минут» остаётся предположением модели. Выбор срока принадлежит людям, отвечающим за процесс.

Полезный результат встречи — согласованные решения и короткий список вопросов с ответственными. Если вопрос влияет на данные или публичный интерфейс, его нужно разрешить до проектирования соответствующей части. Другую, независимую часть работы можно продолжать.

2. Конспекты и заметки: сохраняем принятое решение

После встречи нужен компактный конспект. Полная расшифровка сохраняет разговор, но заставляет следующего читателя заново извлекать из него решения. В заметке должны быть видны принятый вариант, его причина и оставшаяся неопределённость.

Например:

Решение: резерв блокирует оборудование на десять минут с момента создания. Причина: пользователь должен успеть проверить параметры перед подтверждением. Истечение определяется сервером. Вопрос: можно ли продлевать резерв? Решение для первой версии: продление не поддерживается.

Такой текст уже отличает согласованный срок от случайно прозвучавшей идеи.

LLM удобно поручить черновик конспекта и список противоречий между встречами. Участники проверяют, что модель не превратила вопрос в решение и не потеряла исключение. На этом этапе особенно легко получить аккуратный, убедительный текст, который приписывает команде несуществующую договорённость.

3. Формальные требования: заменяем «понятно» на проверяемые правила

Теперь формулируем правила так, чтобы два исполнителя получили одинаковый результат. Вместо «не допускаем двойную бронь» записываем, какие заявки занимают ресурс и что считать пересечением.

| Правило | Согласованное поведение | | — | — | | BR-01 | Интервал имеет вид [startsAt, endsAt): начало включено, конец исключён; начало раньше конца. | | BR-02 | При создании устанавливается HELD, срок резерва — десять минут по серверному времени. | | BR-03 | Оборудование блокируют CONFIRMED и HELD, у которого now < holdExpiresAt. | | BR-04 | Проверка пересечения и создание резерва составляют одну атомарную операцию. | | BR-05 | При now >= holdExpiresAt резерв истёк; подтвердить его нельзя. | | BR-06 | Подтверждение и отмена доступны только владельцу бронирования. |

Идентификаторы помогают связывать решения с диаграммами и сценариями. Агенту можно поручить найти правило без примера или неоднозначное слово. Финальный смысл утверждает человек. Подробные переходы и обработку повторных действий зафиксируем дальше, когда рассмотрим жизненный цикл бронирования.

Хорошее требование выдерживает вопрос «как мы поймём, что оно выполнено?». «Система корректно обрабатывает одновременные запросы» такого ответа не даёт. «Из двух пересекающихся заявок на свободное оборудование успешно создаётся ровно одна» уже задаёт наблюдаемую проверку.

4. Модель данных и ERD: определяем, что существует в системе

В модели достаточно трёх сущностей: пользователь, единица оборудования и бронирование. Каждое бронирование принадлежит одному пользователю и относится к одной единице. У пользователя и оборудования может быть много бронирований.

ERD: User и Equipment связаны отношениями один ко многим с Reservation; у бронирования отдельно указаны интервал использования, статус и срок резерва

Рисунок 3. startsAt и endsAt описывают использование оборудования, holdExpiresAt — срок принятия решения пользователем.

ERD показывает структуру и кратность связей. Правило запрета пересечений нужно записать рядом: обычного внешнего ключа для него недостаточно.

LLM может подготовить текстовую схему и проверить имена полей относительно требований.

Сразу полезно отделить хранимые данные от публичного ответа. Серверу нужен владелец записи, но возвращать клиенту внешнюю идентичность пользователя для подтверждения своей брони незачем. И наоборот, интерфейсу необходимо знать срок резерва, чтобы объяснить оставшееся время. Такой разбор предотвращает привычное копирование таблицы целиком в API и помогает сформулировать будущую схему ответа без привязки к используемому ORM.

5. Use Case: описываем цели пользователя

Use Case помогает проверить, что проект решает пользовательскую задачу. Для сотрудника выделим четыре цели: посмотреть доступность, создать временный резерв, подтвердить и отменить бронирование.

UML Use Case: сотрудник связан с просмотром доступности, созданием резерва, подтверждением и отменой собственного бронирования

Рисунок 4. Линии связывают участника с целями; они не задают последовательность HTTP-вызовов.

Не стоит превращать этот рисунок в перечень всех методов сервиса. Сохранить запись в базе — действие реализации, а сотруднику нужен результат бронирования. Аутентификацию принимаем как предусловие рассматриваемых действий.

LLM легко строит такую схему по списку целей. Польза ревью состоит в проверке границ: не появилась ли у пользователя возможность подтвердить чужую заявку, не пропала ли отмена, не добавилось ли управление оборудованием, которое пока не входит в задачу. Общую нотацию этих и следующих поведенческих диаграмм определяет UML.

6. C4 Context: обозначаем место системы

Следующий вопрос — где заканчивается наша ответственность. На Context-диаграмме есть сотрудник, система бронирования и внешний провайдер идентификации. Мы используем существующие учётные записи, а правила резервирования принадлежат создаваемой системе.

C4 Context: сотрудник использует систему бронирования, которая доверяет внешнему провайдеру идентификации

Рисунок 5. Контекст системы: пользователь, целевая система и внешняя зависимость.

Context удобно обсуждать с людьми, которым не нужны подробности серверного кода. Они могут заметить отсутствующую внешнюю зависимость или неверно очерченную ответственность. Например, если оборудование на самом деле выдаёт отдельная служба, её участие станет новым требованием.

7. C4 Container: распределяем ответственность

Раскроем систему до трёх частей: веб-интерфейс, API бронирования и реляционная база. Интерфейс показывает данные и отправляет команды. API проверяет пользователя и правила. База хранит состояние и участвует в обеспечении атомарности.

C4 Container: сотрудник работает с веб-интерфейсом; интерфейс вызывает API по HTTPS и JSON; API обращается к базе по SQL и проверяет токены внешнего провайдера

Рисунок 6. Контейнер C4 — приложение или хранилище данных

На схеме указываем протоколы и сохраняем названия для будущей Sequence. LLM помогает собрать и отрисовать архитектуру. Для выбранного поведения здесь достаточно одного серверного приложения. Назначение этого уровня подробнее описано в документации C4 Container.

8. State Machine: разбираемся с жизненным циклом

У бронирования четыре состояния: временный резерв HELD, подтверждённая бронь CONFIRMED, отмена CANCELLED и истечение EXPIRED. Из временного резерва можно перейти в любое из трёх остальных состояний. Подтверждённую бронь можно отменить. Отмена и истечение завершают жизненный цикл в пределах нашего примера.

UML State Machine: HELD переходит в CONFIRMED при подтверждении до срока, в EXPIRED при достижении срока или в CANCELLED при отмене; CONFIRMED также можно отменить

Рисунок 7. Условия переходов важнее самого списка статусов. Ровно на границе срока подтверждение уже недопустимо.

Для подготовки диаграммы достаточно короткого задания:

По правилам BR-02, BR-05 и BR-07 версии equipment-reservation-v1
построй State Machine в PlantUML. Покажи условия переходов.
Повторные действия опиши отдельно. Не добавляй новых состояний.
Если правило неоднозначно, перечисли вопросы перед диаграммой.

Текстовую диаграмму легко править через LLM и хранить рядом с документами. Синтаксис и рендер автоматизируются; проверка смысла остаётся задачей ревью. Описание State Diagram в PlantUML.

9. Sequence: проверяем взаимодействие участников

Теперь проследим создание резерва: веб-интерфейс отправляет параметры, API проверяет их, обращается к базе, создаёт запись и возвращает результат. Названия участников берём из Container, полей — из ERD, условий — из требований.

UML Sequence: запрос создания резерва, начало транзакции, блокировка оборудования, чтение пересекающихся броней и ветки ответа 409 или создания с ответом 201

Рисунок 8. Проверка и запись защищены одной транзакцией и сериализацией операций по оборудованию.

LLM полезно попросить найти сообщения без обработчика, разрывы транзакции и альтернативные ветки. На ревью проверяем также момент ответа: 201 отправляется после успешного завершения транзакции.

10. Activity: раскрываем алгоритм и развилки

Sequence отвечает на вопрос «кто с кем взаимодействует», Activity — «какие решения принимаются». В алгоритме создания резерва проверяем входные данные, затем в защищённой операции определяем блокирующие брони и ищем пересечение.

UML Activity создания резерва: проверка данных, атомарная область с блокировкой оборудования, проверка пересечения, ответ 409 либо создание HELD и ответ 201

Рисунок 9. Истёкший HELD исключается из блокирующих броней до проверки пересечения.

Условия удобно записать без привязки к языку программирования:

overlap = existing.startsAt < requested.endsAt
and requested.startsAt < existing.endsAt

blocks = status == CONFIRMED
or (status == HELD and now < holdExpiresAt)

LLM может развернуть правила в Activity и предложить примеры для каждой ветки. При ревью важно сверить порядок действий с Sequence. Красивые картинки, описывающие разные алгоритмы, только увеличат неопределённость. Одна и та же атомарная область должна сохраняться в обоих представлениях.

11. OpenAPI: закрепляем внешний интерфейс

Когда поведение прояснилось, фиксируем HTTP-контракт. В учебном документе есть создание резерва, подтверждение и отмена. Просмотр оборудования и весь процесс входа в него не включены. Используем OpenAPI 3.0.3, как в исходной презентации; это выбор формата примера, а не рекомендация считать его последней версией.

Для создания нужны equipmentId, startsAt и endsAt. Владелец и срок резерва назначаются сервером. Ни userId, ни желаемый статус клиент не передаёт. Короткий фрагмент операции выглядит так:

/api/v1/reservations:
post:
operationId: createReservation
security:
— bearerAuth: []
requestBody:
required: true
content:
application/json:
schema:
$ref: ’#/components/schemas/CreateReservation’
responses:
’201′:
description: Временный резерв создан
content:
application/json:
schema:
$ref: ’#/components/schemas/Reservation’
’409′:
$ref: ’#/components/responses/Conflict’

Это фрагмент; определения схем и остальные ответы находятся в полном учебном OpenAPI. Успешные подтверждение и отмена возвращают 200. Неверные параметры — 400, отсутствие действительной аутентификации — 401. Для неизвестной или чужой брони используется 404; конфликт времени или состояния — 409 с различимым кодом причины.

Контракт позволяет независимо обсуждать фронтенд, сервер и тесты. LLM может подготовить клиентские типы и обработчики, сверить примеры со схемами. Однако описание Bearer не реализует проверку токена, а корректный JSON не доказывает отсутствие двойной брони. Эти обязанности остаются в правилах и реализации. Назначение и структуру HTTP-контрактов определяет спецификация OpenAPI.

12. Markdown-спецификация: собираем согласованный проект

К этому моменту появились несколько связанных представлений. Теперь собираем документ, через который разработчик или агент может пройти от цели до конкретного решения: границы, термины, правила, модель, диаграммы, контракт, принятые ограничения и версия.

Первоначальные требования объясняли, чего мы хотим. Итоговая Markdown-спецификация фиксирует согласованное устройство выбранного сценария. Не нужно вручную переписывать в неё весь OpenAPI: достаточно ссылок и объяснения решений, которые нельзя вывести из структуры запроса.

В приложениях есть спецификация примера версии equipment-reservation-v1. Это обозначение редакции учебного комплекта, не ссылка на существующий Git-тег. В ней, например, явно разделены сохранённый статус и фактическое истечение по серверному времени.

LLM помогает проверить согласованность: все ли состояния существуют в модели, соответствует ли ответ ветке алгоритма, нет ли правила без сценария.

13. BDD-сценарии: договариваемся о наблюдаемом результате

Перед кодом задаём конкретные исходные данные, действие и ожидаемый результат. Например, в терминах Gherkin:

# language: ru
Функциональность: Резервирование оборудования

Сценарий: Подтверждение ровно на границе срока
Допустим мой резерв находится в состоянии HELD
И его срок истекает в «2026-11-02T09:10:00Z»
И серверное время равно «2026-11-02T09:10:00Z»
Когда я подтверждаю резерв
Тогда API возвращает статус 409
И код ошибки равен «RESERVATION_EXPIRED»
И резерв не блокирует оборудование

Нужны также успешное создание, пересечение, соседние интервалы, отмена, повторные команды и доступ к чужой брони. Для конкуренции фиксируем результат: из двух одновременных пересекающихся запросов к свободному оборудованию один получает 201, другой — 409; блокирующая запись остаётся одна. Победитель заранее не определён.

Сценарии хранятся в отдельном файле. Пока у них нет шаговых определений и приложения, это согласованные примеры, а не выполненные автоматические тесты. Их автоматизацию поручаем LLM при реализации соответствующего шага.

14. Код и тесты: одна задача, одно ревью, следующий шаг

Теперь можно передавать реализацию агенту. Большую фичу разбиваем так, чтобы результат каждого задания можно было проверить отдельно: модель и переходы; атомарное резервирование; подтверждение и отмена; HTTP API; веб-интерфейс; итоговая проверка пользовательских сценариев. Тесты добавляются на каждом шаге, а не откладываются до последнего.

Последовательный цикл: небольшая задача передаётся LLM, затем выполняются проверки и ревью человеком; ошибка возвращает текущий шаг на исправление, принятый результат открывает следующий шаг

Рисунок 10. Человек проверяет результат текущего шага перед переходом к следующему. Изменение бизнес-правил возвращается на согласование проекта.

Например, задание для этапа резервирования:

Реализуй атомарное создание временного резерва.
Основа: equipment-reservation-v1 — reservation-spec.md,
openapi.yaml, 03-erd.puml, 08-sequence.puml, 09-activity.puml
и сценарии reservations.feature с тегом @create.
Все материалы находятся в assets/.

Проверь согласованность входных материалов.
Соблюдай выбранную сериализацию операций по оборудованию.
Автоматизируй создание, конфликт, соседние интервалы,
истечение блокировки и два конкурентных запроса.
Не меняй контракт и ожидания сценариев ради зелёных тестов.
Представь изменения, результаты проверок и открытые вопросы.
После этого дождись ревью; следующий этап не начинай.

Это задание для будущего проекта: приложенный комплект не содержит реализации сервиса. В реальном репозитории к нему добавляются технология, команды проверки и актуальная ревизия материалов.

Человеку остаётся проверить соответствие правилу и разумность инженерного решения. Для доменной логики полезны быстрые тесты с управляемым временем. Конкуренцию и блокировки проверяют на выбранной базе: имитация хранилища не подтвердит её транзакционные гарантии. Затем проверяются HTTP-контракт и пользовательский путь.

Если ошибся код, исправляем код. Если обнаружен пробел проекта, сначала согласуем изменение схем, правил и сценариев. Ревью небольшого шага помогает локализовать проблему до того, как поверх неё вырастет следующая часть фичи.

Основное усилие — в середину процесса

В большой разработке полезно максимально сосредоточиться там, где решение уже достаточно точное, а менять его ещё сравнительно просто: на модели данных, UML-диаграммах, границах C4 и контрактах. Разговоры дают материал для этих решений. Код воплощает их. Markdown связывает, сценарии делают ожидания проверяемыми.

LLM снижает порог подготовки схем: описываем правило обычным языком, получаем текст диаграммы, просматриваем результат, исправляем. Тратить время приходится прежде всего на смысл — какой переход разрешён, кто отвечает за операцию, что считается конфликтом. Именно эти решения особенно дорого восстанавливать из уже написанного кода.

Когда схема, данные и контракт согласованы, у агента меньше причин угадывать поведение. Реализацию можно последовательно отдавать небольшими задачами, оставляя человеку принятие решений и ревью. Это не делает ошибки пренебрежимо малыми автоматически, но позволяет раньше обнаруживать расхождения и ограничивать объём переделок.

Учебные приложения

Для работы с примером сохраните содержимое приложений в файлы с указанными именами в каталоге assets/. Текстовые исходники диаграмм включены в приложение со спецификацией.

OpenAPI 3.0.3 — openapi.yaml

openapi: 3.0.3
info:
title: Бронирование оборудования — учебный HTTP-контракт
version: 1.0.0
description: ’Редакция комплекта: equipment-reservation-v1. Охват: создание, подтверждение
и отмена. Просмотр доступности, вход, эксплуатационные ошибки и выдача оборудования
не описаны. Бизнес-правила и модель находятся в reservation-spec.md. Это проект
контракта, сервис не реализован.’
paths:
/api/v1/reservations:
post:
operationId: createReservation
summary: Создать временный резерв
description: ’BR-01—BR-04. Атомарно проверить пересечение и создать HELD на
10 минут. Владелец берётся из проверенной идентичности. Повторный POST не
имеет специального ключа идемпотентности: при действующем первом резерве пересекающийся
повтор получит 409 EQUIPMENT_BUSY.’
security:
— bearerAuth: []
requestBody:
required: true
content:
application/json:
schema:
$ref: ’#/components/schemas/CreateReservation’
example:
equipmentId: eq-042
startsAt: ’2026-11-02T10:00:00Z’
endsAt: ’2026-11-02T11:00:00Z’
responses:
’201′:
description: Временный резерв создан
content:
application/json:
schema:
$ref: ’#/components/schemas/Reservation’
example:
id: res-001
equipmentId: eq-042
startsAt: ’2026-11-02T10:00:00Z’
endsAt: ’2026-11-02T11:00:00Z’
status: HELD
holdExpiresAt: ’2026-11-02T09:10:00Z’
’400′: &id001
$ref: ’#/components/responses/BadRequest’
’401′: &id002
$ref: ’#/components/responses/Unauthorized’
’404′: &id003
$ref: ’#/components/responses/NotFound’
’409′: &id004
$ref: ’#/components/responses/Conflict’
/api/v1/reservations/{reservationId}/confirm:
post:
operationId: confirmReservation
summary: Подтвердить собственный резерв
description: BR-05—BR-07. HELD подтверждается только при now < holdExpiresAt.
CONFIRMED возвращается без изменения с 200. EXPIRED, включая HELD с истёкшим
сроком, возвращает 409 RESERVATION_EXPIRED. CANCELLED возвращает 409 INVALID_STATE.
security:
— bearerAuth: []
parameters:
— name: reservationId
in: path
required: true
schema: &id005
type: string
minLength: 1
maxLength: 80
pattern: ^[A-Za-z0-9_-]+$
responses:
’200′:
description: Операция выполнена
content:
application/json:
schema:
$ref: ’#/components/schemas/Reservation’
example:
id: res-001
equipmentId: eq-042
startsAt: ’2026-11-02T10:00:00Z’
endsAt: ’2026-11-02T11:00:00Z’
status: CONFIRMED
holdExpiresAt: ’2026-11-02T09:10:00Z’
’400′: *id001
’401′: *id002
’404′: *id003
’409′: *id004
/api/v1/reservations/{reservationId}/cancel:
post:
operationId: cancelReservation
summary: Отменить собственное бронирование
description: BR-05—BR-07. Действующий HELD и CONFIRMED переходят в CANCELLED.
Повторная отмена CANCELLED возвращает 200 без изменения. EXPIRED, включая
HELD с истёкшим сроком, возвращает 409 RESERVATION_EXPIRED.
security:
— bearerAuth: []
parameters:
— name: reservationId
in: path
required: true
schema: *id005
responses:
’200′:
description: Операция выполнена
content:
application/json:
schema:
$ref: ’#/components/schemas/Reservation’
example:
id: res-001
equipmentId: eq-042
startsAt: ’2026-11-02T10:00:00Z’
endsAt: ’2026-11-02T11:00:00Z’
status: CANCELLED
holdExpiresAt: ’2026-11-02T09:10:00Z’
’400′: *id001
’401′: *id002
’404′: *id003
’409′: *id004
components:
securitySchemes:
bearerAuth:
type: http
scheme: bearer
bearerFormat: JWT
description: API проверяет подпись, издателя, аудиторию и срок токена. Локальный
пользователь определяется по паре issuer/subject; userId из запроса не принимается.
schemas:
CreateReservation:
type: object
additionalProperties: false
required:
— equipmentId
— startsAt
— endsAt
description: ’BR-01: startsAt < endsAt. Сравнение дат и проверка пересечения
выполняются сервером.’
properties:
equipmentId: *id005
startsAt: &id006
type: string
format: date-time
pattern: Z$
description: Время UTC; строка RFC 3339 с суффиксом Z.
endsAt: *id006
Reservation:
type: object
additionalProperties: false
required:
— id
— equipmentId
— startsAt
— endsAt
— status
— holdExpiresAt
properties:
id: *id005
equipmentId: *id005
startsAt: *id006
endsAt: *id006
status:
type: string
enum:
— HELD
— CONFIRMED
— CANCELLED
— EXPIRED
description: ’Эффективное состояние: HELD с now >= holdExpiresAt считается
EXPIRED.’
holdExpiresAt:
type: string
format: date-time
pattern: Z$
description: Исходный срок временного резерва; после CONFIRMED или CANCELLED
сохраняется для истории и больше не ограничивает эти состояния.
Error:
type: object
additionalProperties: false
required:
— code
— message
properties:
code:
type: string
enum:
— INVALID_REQUEST
— UNAUTHENTICATED
— EQUIPMENT_NOT_FOUND
— RESERVATION_NOT_FOUND
— EQUIPMENT_BUSY
— RESERVATION_EXPIRED
— INVALID_STATE
message:
type: string
description: Пояснение для человека; клиент ветвится по code.
responses:
BadRequest:
description: Некорректные параметры, лишние поля или startsAt >= endsAt.
content:
application/json:
schema:
$ref: ’#/components/schemas/Error’
example:
code: INVALID_REQUEST
message: Некорректные параметры, лишние поля или startsAt >= endsAt.
Unauthorized:
description: Отсутствует действительная аутентификация.
content:
application/json:
schema:
$ref: ’#/components/schemas/Error’
example:
code: UNAUTHENTICATED
message: Отсутствует действительная аутентификация.
headers:
WWW-Authenticate:
schema:
type: string
example: Bearer
description: Схема аутентификации.
NotFound:
description: Оборудование не найдено; бронирование отсутствует или принадлежит
другому пользователю.
content:
application/json:
schema:
$ref: ’#/components/schemas/Error’
example:
code: RESERVATION_NOT_FOUND
message: Оборудование не найдено; бронирование отсутствует или принадлежит
другому пользователю.
Conflict:
description: Конфликт интервала либо недопустимое действие над состоянием.
content:
application/json:
schema:
$ref: ’#/components/schemas/Error’
examples:
EQUIPMENT_BUSY:
value:
code: EQUIPMENT_BUSY
message: Интервал занят.
RESERVATION_EXPIRED:
value:
code: RESERVATION_EXPIRED
message: Срок резерва истёк.
INVALID_STATE:
value:
code: INVALID_STATE
message: Действие недопустимо в текущем состоянии.

Спецификация и исходники диаграмм — reservation-spec.md

Бронирование оборудования: спецификация учебного примера

Редакция: equipment-reservation-v1. Статус: согласованный внутри статьи учебный проект. Это не реализованный сервис и не Git-тег. Все материалы данного комплекта относятся к этой редакции.

Цель и границы

Сотрудник резервирует конкретную единицу оборудования, подтверждает или отменяет собственное бронирование. Рассматриваются конфликты интервалов, срок резерва и конкуренция команд. Оплата, продление резерва, выдача, возврат, управление оборудованием и регистрация пользователей вне охвата.

Просмотр доступности входит в пользовательский сценарий, но его HTTP-контракт в приложенном OpenAPI не описан. Доступность на экране справочная: гарантия появляется только после успешного создания резерва. Учебный проект не устанавливает производственные SLO, лимиты запросов и политику обработки инфраструктурных сбоев.

Требования и правила

| ID | Правило | | — | — | | BR-01 | Интервал [startsAt, endsAt); startsAt < endsAt. Пересечение: a.startsAt < b.endsAt && b.startsAt < a.endsAt. Соседние интервалы разрешены. В контракте все даты передаются в UTC с Z. Дополнительных ограничений относительно текущей даты учебный контракт не вводит. | | BR-02 | При успешном создании состояние HELD, createdAt = now, holdExpiresAt = now + 10 минут. Владельца и время назначает сервер. | | BR-03 | Одинаковое оборудование блокируется пересекающимися CONFIRMED и HELD при now < holdExpiresAt. CANCELLED и истёкшие резервы не блокируют. | | BR-04 | Проверка конфликта и создание атомарны. Все изменения броней одного оборудования сериализуются блокировкой его строки. Проверки читают актуальное состояние после получения блокировки. | | BR-05 | HELD при now >= holdExpiresAt имеет эффективное состояние EXPIRED, даже если сохранённое поле ещё HELD. Подтверждение и отмена возвращают 409 RESERVATION_EXPIRED. Истёкшая запись не занимает интервал. | | BR-06 | API проверяет токен и сопоставляет (issuer, subject) локальному пользователю. Подтверждать и отменять можно только собственные бронирования. Отсутствие действительной аутентификации — 401; неизвестная и чужая бронь — одинаковый 404 RESERVATION_NOT_FOUND. | | BR-07 | Действующий HELD подтверждается в CONFIRMED или отменяется в CANCELLED. CONFIRMED отменяется в CANCELLED. Повтор confirm для CONFIRMED и cancel для CANCELLED дают 200 без изменения. Confirm для CANCELLED — 409 INVALID_STATE. Восстановление из CANCELLED и EXPIRED не поддерживается. |

Порядок обработки: аутентификация → проверка формата → поиск ресурса и проверка владельца → защищённая проверка состояния и изменение. Для чужой брони ошибки состояния не раскрываются. Команды confirm/cancel не имеют тела запроса. Повторный create не получает идемпотентность команд confirm/cancel: при действующем первом резерве повтор на пересекающийся интервал вернёт 409 EQUIPMENT_BUSY.

Модель данных

ERD · исходник.

— User: id (PK), authIssuer, authSubject; пара (authIssuer, authSubject) уникальна. — Equipment: id (PK), inventoryNumber (уникален), name. — Reservation: id (PK), userId (FK), equipmentId (FK), startsAt, endsAt, createdAt, holdExpiresAt, status. — Все перечисленные поля обязательны. Каждая бронь относится ровно к одному пользователю и оборудованию; у каждого из них может быть от нуля до многих броней. — status: HELD, CONFIRMED, CANCELLED, EXPIRED. Срок резерва сохраняется для истории после подтверждения или отмены и не ограничивает эти состояния. — Публичный ответ не содержит userId, внешнюю идентичность и createdAt; схема хранения и HTTP DTO различаются.

Архитектура и поведение

Use Case · C4 Context · C4 Container.

Сотрудник использует веб-интерфейс. Веб-интерфейс обращается к API бронирования по HTTPS/JSON с Bearer-токеном. Внешний провайдер идентификации обслуживает вход; API получает метаданные и ключи для проверки токена. API обращается по SQL к базе бронирований. Локальная проверка владельца остаётся обязанностью API. C4 описывает архитектуру отдельно от UML.

State Machine · Sequence · Activity.

Операция создания:

Проверить аутентификацию, формат и обязательные поля, сравнение начала и конца; найти оборудование.
Начать транзакцию и получить блокировку строки оборудования. Удаление оборудования в учебном сценарии не предусмотрено; в полном продукте существование проверяется и внутри транзакции.
Получить актуальное серверное время now после ожидания блокировки.
Прочитать актуальные брони этого оборудования. СУБД и уровень изоляции должны обеспечивать видимость результатов ранее завершившейся операции после получения блокировки; устаревший снимок недопустим.
Проверить BR-03. При конфликте откатить транзакцию, освободить блокировку и вернуть 409 EQUIPMENT_BUSY.
Создать HELD по BR-02. Зафиксировать транзакцию и только после успешного commit вернуть 201 с бронированием.

Confirm/cancel используют ту же сериализацию по оборудованию; после блокировки заново читают запись и проверяют эффективное состояние. Время и состояние оцениваются внутри защищённой операции. Фоновая материализация EXPIRED необязательна для правильности и также не должна перезаписывать конкурентное подтверждение.

Тайм-ауты, дедлоки и потеря соединения требуют отдельной политики полного продукта. Автоматический повтор create после неизвестного результата не считается безопасным решением по умолчанию. Пример описывает нормальное завершение транзакций и бизнес-конфликты.

Публичный HTTP-контракт

OpenAPI 3.0.3, версия документа 1.0.0.

| Операция | Успех | Бизнес-конфликты | | — | — | — | | POST /api/v1/reservations | 201, HELD | 409 EQUIPMENT_BUSY | | POST /api/v1/reservations/{reservationId}/confirm | 200, CONFIRMED | 409 RESERVATION_EXPIRED / INVALID_STATE | | POST /api/v1/reservations/{reservationId}/cancel | 200, CANCELLED | 409 RESERVATION_EXPIRED |

Общие ошибки: 400 INVALID_REQUEST, 401 UNAUTHENTICATED, 404 EQUIPMENT_NOT_FOUND при создании и 404 RESERVATION_NOT_FOUND для неизвестной/чужой брони. Ошибка содержит code и message; логика клиента использует code.

Пример создания: серверное время 2026-11-02T09:00:00Z, оборудование eq-042, интервал 10:00—11:00Z той же даты. Результат: HELD, срок 09:10:00Z. Ровно в 09:10:00Z неподтверждённый резерв больше не блокирует интервал.

Сценарии и соответствие правилам

BDD на Gherkin. Сценарии имеют теги правил и этапов. Время контролируется тестовым стендом, даты примеров не зависят от фактического дня запуска.

Последовательность реализации для будущего проекта

Модель, функции пересечения и переходы; быстрые проверки с управляемым временем.
Хранилище и атомарное резервирование; сценарии @create, включая конкуренцию на реальной выбранной СУБД.
Подтверждение и отмена; сценарии @confirm, @cancel, проверка владельца и повторов.
HTTP-адаптеры по OpenAPI; проверка форматов и статусов. При необходимости проверки бизнес-слоя на предыдущих шагах работают без HTTP-адаптера.
Веб-интерфейс: свободное время, команды, понятное отображение конфликтов и срока. До этого шага нужно отдельно согласовать API чтения, отсутствующее в учебном документе.
Итоговая проверка пользовательского пути и согласованности артефактов.

После каждого шага — проверки и ревью человеком. Изменение требований предваряет изменение зависимых контрактов, сценариев и кода. Наличие BDD-файла не означает, что тесты выполнены: сервис и шаговые определения в этот комплект не входят.

Текстовые исходники диаграмм

03-erd.puml

@startuml
!pragma layout smetana
skinparam backgroundColor #F7F6F2
skinparam defaultFontName DejaVu Sans
skinparam defaultFontSize 23
skinparam shadowing false
skinparam roundcorner 12
skinparam ArrowColor #315DF5
skinparam ArrowThickness 2
skinparam LineThickness 2
skinparam defaultFontColor #182020
skinparam classBackgroundColor #E9EEFF
skinparam classBorderColor #315DF5
skinparam classAttributeFontSize 22
skinparam classFontSize 25
skinparam rectangleBackgroundColor #E9EEFF
skinparam rectangleBorderColor #315DF5
skinparam rectangleFontSize 23
skinparam packageBackgroundColor #F7F6F2
skinparam packageBorderColor #9BAACD
skinparam stateBackgroundColor #E9EEFF
skinparam stateBorderColor #315DF5
skinparam stateFontSize 24
skinparam usecaseBackgroundColor #E9EEFF
skinparam usecaseBorderColor #315DF5
skinparam activityBackgroundColor #E9EEFF
skinparam activityBorderColor #315DF5
skinparam activityDiamondBackgroundColor #FFFFFF
skinparam activityDiamondBorderColor #315DF5
skinparam participantBackgroundColor #E9EEFF
skinparam participantBorderColor #315DF5
skinparam sequenceLifeLineBorderColor #9BAACD
skinparam sequenceGroupBorderColor #315DF5
skinparam sequenceGroupBackgroundColor #F7F6F2
skinparam noteBackgroundColor #FFFFFF
skinparam noteBorderColor #9BAACD
skinparam nodesep 55
skinparam ranksep 65

hide circle
hide methods
entity «User\nПользователь» as U {
* id : identifier <<PK>>
—
* authIssuer : string
* authSubject : string
}
entity «Equipment\nЕдиница оборудования» as E {
* id : identifier <<PK>>
—
* inventoryNumber : string <<unique>>
* name : string
}
entity «Reservation\nБронирование» as R {
* id : identifier <<PK>>
—
* userId : identifier <<FK>>
* equipmentId : identifier <<FK>>
* startsAt : UTC timestamp
* endsAt : UTC timestamp
* holdExpiresAt : UTC timestamp
* createdAt : UTC timestamp
* status : enum
}
U ||-down-o{ R : владеет
E ||-down-o{ R : бронируется
U -[hidden]right- E

@enduml

04-use-case.puml

@startuml
!pragma layout smetana
skinparam backgroundColor #F7F6F2
skinparam defaultFontName DejaVu Sans
skinparam defaultFontSize 23
skinparam shadowing false
skinparam roundcorner 12
skinparam ArrowColor #315DF5
skinparam ArrowThickness 2
skinparam LineThickness 2
skinparam defaultFontColor #182020
skinparam classBackgroundColor #E9EEFF
skinparam classBorderColor #315DF5
skinparam classAttributeFontSize 22
skinparam classFontSize 25
skinparam rectangleBackgroundColor #E9EEFF
skinparam rectangleBorderColor #315DF5
skinparam rectangleFontSize 23
skinparam packageBackgroundColor #F7F6F2
skinparam packageBorderColor #9BAACD
skinparam stateBackgroundColor #E9EEFF
skinparam stateBorderColor #315DF5
skinparam stateFontSize 24
skinparam usecaseBackgroundColor #E9EEFF
skinparam usecaseBorderColor #315DF5
skinparam activityBackgroundColor #E9EEFF
skinparam activityBorderColor #315DF5
skinparam activityDiamondBackgroundColor #FFFFFF
skinparam activityDiamondBorderColor #315DF5
skinparam participantBackgroundColor #E9EEFF
skinparam participantBorderColor #315DF5
skinparam sequenceLifeLineBorderColor #9BAACD
skinparam sequenceGroupBorderColor #315DF5
skinparam sequenceGroupBackgroundColor #F7F6F2
skinparam noteBackgroundColor #FFFFFF
skinparam noteBorderColor #9BAACD
skinparam nodesep 55
skinparam ranksep 65

actor «Сотрудник» as U
rectangle «Система бронирования» {
usecase «Посмотреть\nдоступность» as View
usecase «Создать\nвременный резерв» as Hold
usecase «Подтвердить\nсвоё бронирование» as Confirm
usecase «Отменить\nсвоё бронирование» as Cancel
View -[hidden]down- Hold
Hold -[hidden]down- Confirm
Confirm -[hidden]down- Cancel
}
U -right- View
U -right- Hold
U -right- Confirm
U -right- Cancel

@enduml

05-c4-context.puml

@startuml
!pragma layout smetana
skinparam backgroundColor #F7F6F2
skinparam defaultFontName DejaVu Sans
skinparam defaultFontSize 23
skinparam shadowing false
skinparam roundcorner 12
skinparam ArrowColor #315DF5
skinparam ArrowThickness 2
skinparam LineThickness 2
skinparam defaultFontColor #182020
skinparam classBackgroundColor #E9EEFF
skinparam classBorderColor #315DF5
skinparam classAttributeFontSize 22
skinparam classFontSize 25
skinparam rectangleBackgroundColor #E9EEFF
skinparam rectangleBorderColor #315DF5
skinparam rectangleFontSize 23
skinparam packageBackgroundColor #F7F6F2
skinparam packageBorderColor #9BAACD
skinparam stateBackgroundColor #E9EEFF
skinparam stateBorderColor #315DF5
skinparam stateFontSize 24
skinparam usecaseBackgroundColor #E9EEFF
skinparam usecaseBorderColor #315DF5
skinparam activityBackgroundColor #E9EEFF
skinparam activityBorderColor #315DF5
skinparam activityDiamondBackgroundColor #FFFFFF
skinparam activityDiamondBorderColor #315DF5
skinparam participantBackgroundColor #E9EEFF
skinparam participantBorderColor #315DF5
skinparam sequenceLifeLineBorderColor #9BAACD
skinparam sequenceGroupBorderColor #315DF5
skinparam sequenceGroupBackgroundColor #F7F6F2
skinparam noteBackgroundColor #FFFFFF
skinparam noteBorderColor #9BAACD
skinparam nodesep 55
skinparam ranksep 65

actor «Сотрудник\n[Person]» as U
rectangle «Система бронирования\n[Software System]\n\nДоступность, резервы,\nподтверждение и отмена» as S
rectangle «Провайдер идентификации\n[External Software System]\n\nУчётные записи\nи выпуск токенов» as I #E8E9ED
U -down-> S : Бронирует оборудование
S -down-> I : Использует внешнюю идентичность
U -right-> I : Входит в учётную запись

@enduml

06-c4-container.puml

@startuml
!pragma layout smetana
skinparam backgroundColor #F7F6F2
skinparam defaultFontName DejaVu Sans
skinparam defaultFontSize 23
skinparam shadowing false
skinparam roundcorner 12
skinparam ArrowColor #315DF5
skinparam ArrowThickness 2
skinparam LineThickness 2
skinparam defaultFontColor #182020
skinparam classBackgroundColor #E9EEFF
skinparam classBorderColor #315DF5
skinparam classAttributeFontSize 22
skinparam classFontSize 25
skinparam rectangleBackgroundColor #E9EEFF
skinparam rectangleBorderColor #315DF5
skinparam rectangleFontSize 23
skinparam packageBackgroundColor #F7F6F2
skinparam packageBorderColor #9BAACD
skinparam stateBackgroundColor #E9EEFF
skinparam stateBorderColor #315DF5
skinparam stateFontSize 24
skinparam usecaseBackgroundColor #E9EEFF
skinparam usecaseBorderColor #315DF5
skinparam activityBackgroundColor #E9EEFF
skinparam activityBorderColor #315DF5
skinparam activityDiamondBackgroundColor #FFFFFF
skinparam activityDiamondBorderColor #315DF5
skinparam participantBackgroundColor #E9EEFF
skinparam participantBorderColor #315DF5
skinparam sequenceLifeLineBorderColor #9BAACD
skinparam sequenceGroupBorderColor #315DF5
skinparam sequenceGroupBackgroundColor #F7F6F2
skinparam noteBackgroundColor #FFFFFF
skinparam noteBorderColor #9BAACD
skinparam nodesep 55
skinparam ranksep 65

actor «Сотрудник\n[Person]» as U
rectangle «Система\nбронирования» {
rectangle «Веб-интерфейс\n[Container: браузерное приложение]\n\nВыбор времени и команды» as W
rectangle «API бронирования\n[Container: серверное приложение]\n\nПроверка пользователя и правил» as A
database «База бронирований\n[Container: реляционная БД]\n\nДанные, транзакции, блокировки\n» as D
W -down-> A : Команды / ответы\n[HTTPS / JSON]\nBearer-токен
A -down-> D : Чтение и изменение\n[SQL]
}
rectangle «Провайдер\nидентификации\n[External System]» as I #E8E9ED
U -down-> W : Использует
W -right-> I : Вход\n[OIDC / HTTPS]
A -right-> I : Ключи\nпроверки\n[HTTPS]

@enduml

07-state-machine.puml

@startuml
!pragma layout smetana
skinparam backgroundColor #F7F6F2
skinparam defaultFontName DejaVu Sans
skinparam defaultFontSize 23
skinparam shadowing false
skinparam roundcorner 12
skinparam ArrowColor #315DF5
skinparam ArrowThickness 2
skinparam LineThickness 2
skinparam defaultFontColor #182020
skinparam classBackgroundColor #E9EEFF
skinparam classBorderColor #315DF5
skinparam classAttributeFontSize 22
skinparam classFontSize 25
skinparam rectangleBackgroundColor #E9EEFF
skinparam rectangleBorderColor #315DF5
skinparam rectangleFontSize 23
skinparam packageBackgroundColor #F7F6F2
skinparam packageBorderColor #9BAACD
skinparam stateBackgroundColor #E9EEFF
skinparam stateBorderColor #315DF5
skinparam stateFontSize 24
skinparam usecaseBackgroundColor #E9EEFF
skinparam usecaseBorderColor #315DF5
skinparam activityBackgroundColor #E9EEFF
skinparam activityBorderColor #315DF5
skinparam activityDiamondBackgroundColor #FFFFFF
skinparam activityDiamondBorderColor #315DF5
skinparam participantBackgroundColor #E9EEFF
skinparam participantBorderColor #315DF5
skinparam sequenceLifeLineBorderColor #9BAACD
skinparam sequenceGroupBorderColor #315DF5
skinparam sequenceGroupBackgroundColor #F7F6F2
skinparam noteBackgroundColor #FFFFFF
skinparam noteBorderColor #9BAACD
skinparam nodesep 55
skinparam ranksep 65

state «Временный резерв\nHELD» as H
state «Подтверждённая бронь\nCONFIRMED» as C
state «Отмена\nCANCELLED» as X
state «Истечение\nEXPIRED» as E
[*] —> H : создать
H -down-> C : подтвердить\n[now <\nholdExpiresAt]
H -right-> E : срок истёк\n[now >=\nholdExpiresAt]
H -left-> X : отменить\n[now <\nholdExpiresAt]
C -left-> X : отменить
@enduml

08-sequence.puml

@startuml
!pragma layout smetana
skinparam backgroundColor #F7F6F2
skinparam defaultFontName DejaVu Sans
skinparam defaultFontSize 23
skinparam shadowing false
skinparam roundcorner 12
skinparam ArrowColor #315DF5
skinparam ArrowThickness 2
skinparam LineThickness 2
skinparam defaultFontColor #182020
skinparam classBackgroundColor #E9EEFF
skinparam classBorderColor #315DF5
skinparam classAttributeFontSize 22
skinparam classFontSize 25
skinparam rectangleBackgroundColor #E9EEFF
skinparam rectangleBorderColor #315DF5
skinparam rectangleFontSize 23
skinparam packageBackgroundColor #F7F6F2
skinparam packageBorderColor #9BAACD
skinparam stateBackgroundColor #E9EEFF
skinparam stateBorderColor #315DF5
skinparam stateFontSize 24
skinparam usecaseBackgroundColor #E9EEFF
skinparam usecaseBorderColor #315DF5
skinparam activityBackgroundColor #E9EEFF
skinparam activityBorderColor #315DF5
skinparam activityDiamondBackgroundColor #FFFFFF
skinparam activityDiamondBorderColor #315DF5
skinparam participantBackgroundColor #E9EEFF
skinparam participantBorderColor #315DF5
skinparam sequenceLifeLineBorderColor #9BAACD
skinparam sequenceGroupBorderColor #315DF5
skinparam sequenceGroupBackgroundColor #F7F6F2
skinparam noteBackgroundColor #FFFFFF
skinparam noteBorderColor #9BAACD
skinparam nodesep 55
skinparam ranksep 65

hide footbox
skinparam maxMessageSize 350
participant «Веб-интерфейс» as W
participant «API бронирования» as A
database «База бронирований» as D
note over W,D
Предусловие: аутентификация и параметры проверены;
оборудование существует. Показана операция создания.
end note
W -> A : POST /api/v1/reservations
activate A
group Одна транзакция / сериализация по оборудованию
A -> D : BEGIN; заблокировать строку Equipment
D —> A : Блокировка получена
A -> A : now = серверное время
A -> D : Прочитать блокирующие брони\nи проверить пересечение
D —> A : Результат проверки
alt Есть пересечение
A -> D : ROLLBACK; освободить блокировку
D —> A : Транзакция завершена
A —> W : 409 EQUIPMENT_BUSY
else Интервал свободен
A -> D : INSERT Reservation: HELD\nholdExpiresAt = now + 10 мин
A -> D : COMMIT; освободить блокировку
D —> A : Изменение сохранено
A —> W : 201 Reservation
end
end
deactivate A

@enduml

09-activity.puml

@startuml
!pragma layout smetana
skinparam backgroundColor #F7F6F2
skinparam defaultFontName DejaVu Sans
skinparam defaultFontSize 23
skinparam shadowing false
skinparam roundcorner 12
skinparam ArrowColor #315DF5
skinparam ArrowThickness 2
skinparam LineThickness 2
skinparam defaultFontColor #182020
skinparam classBackgroundColor #E9EEFF
skinparam classBorderColor #315DF5
skinparam classAttributeFontSize 22
skinparam classFontSize 25
skinparam rectangleBackgroundColor #E9EEFF
skinparam rectangleBorderColor #315DF5
skinparam rectangleFontSize 23
skinparam packageBackgroundColor #F7F6F2
skinparam packageBorderColor #9BAACD
skinparam stateBackgroundColor #E9EEFF
skinparam stateBorderColor #315DF5
skinparam stateFontSize 24
skinparam usecaseBackgroundColor #E9EEFF
skinparam usecaseBorderColor #315DF5
skinparam activityBackgroundColor #E9EEFF
skinparam activityBorderColor #315DF5
skinparam activityDiamondBackgroundColor #FFFFFF
skinparam activityDiamondBorderColor #315DF5
skinparam participantBackgroundColor #E9EEFF
skinparam participantBorderColor #315DF5
skinparam sequenceLifeLineBorderColor #9BAACD
skinparam sequenceGroupBorderColor #315DF5
skinparam sequenceGroupBackgroundColor #F7F6F2
skinparam noteBackgroundColor #FFFFFF
skinparam noteBorderColor #9BAACD
skinparam nodesep 55
skinparam ranksep 65

start
:Аутентифицированный запрос;
if (Параметры корректны?) then (нет)
:400 INVALID_REQUEST;
stop
else (да)
endif
if (Оборудование существует?) then (нет)
:404 EQUIPMENT_NOT_FOUND;
stop
else (да)
endif
partition «Атомарная операция» {
:Начать транзакцию;\nзаблокировать строку Equipment;
:Получить серверное now;
:CONFIRMED блокирует без проверки срока;\nHELD — только при now < holdExpiresAt;
if (Есть пересечение\nинтервалов?) then (да)
:Откатить транзакцию;\nосвободить блокировку;
:409 EQUIPMENT_BUSY;
stop
else (нет)
:Создать HELD;\nholdExpiresAt = now + 10 мин;
:Зафиксировать транзакцию;\nосвободить блокировку;
endif
}
:201 Reservation;
stop

@enduml

BDD-сценарии — reservations.feature

# language: ru
@equipment-reservation-v1
Функциональность: Резервирование оборудования
Учебные ожидания; реализация сервиса и шагов отсутствует.
Все времена UTC, часы сервера управляются тестовым стендом.

Предыстория:
Допустим существует оборудование «eq-042»
И я аутентифицирован как пользователь «user-a»
И серверное время равно «2026-11-02T09:00:00Z»
И у оборудования нет бронирований

@create @BR-01 @BR-02
Сценарий: Создание свободного резерва
Когда я создаю резерв «eq-042» с «2026-11-02T10:00:00Z» до «2026-11-02T11:00:00Z»
Тогда API возвращает статус 201
И состояние бронирования равно «HELD»
И срок резерва равен «2026-11-02T09:10:00Z»
И владельцем сохранённой записи является «user-a»

@create @BR-01 @BR-03
Сценарий: Пересечение с подтверждённой бронью
Допустим оборудование занято подтверждённой бронью с «2026-11-02T10:00:00Z» до «2026-11-02T11:00:00Z»
Когда я создаю резерв «eq-042» с «2026-11-02T10:30:00Z» до «2026-11-02T11:30:00Z»
Тогда API возвращает статус 409
И код ошибки равен «EQUIPMENT_BUSY»
И новое бронирование не создаётся

@create @BR-01 @BR-03
Сценарий: Соседние интервалы не пересекаются
Допустим оборудование занято подтверждённой бронью с «2026-11-02T10:00:00Z» до «2026-11-02T11:00:00Z»
Когда я создаю резерв «eq-042» с «2026-11-02T11:00:00Z» до «2026-11-02T12:00:00Z»
Тогда API возвращает статус 201

@create @BR-01
Структура сценария: Некорректный интервал
Когда я создаю резерв «eq-042» с «<начало>» до «<конец>»
Тогда API возвращает статус 400
И код ошибки равен «INVALID_REQUEST»
И новое бронирование не создаётся
Примеры:
| начало | конец |
| 2026-11-02T10:00:00Z | 2026-11-02T10:00:00Z |
| 2026-11-02T11:00:00Z | 2026-11-02T10:00:00Z |

@create @BR-03 @BR-05
Структура сценария: Срок резерва влияет на доступность без фонового обновления
Допустим сохранён резерв HELD на «eq-042» с «2026-11-02T10:00:00Z» до «2026-11-02T11:00:00Z»
И его срок истекает в «2026-11-02T09:10:00Z»
И фоновый обработчик не обновлял статус
И серверное время равно «<время>»
Когда я создаю резерв «eq-042» с «2026-11-02T10:30:00Z» до «2026-11-02T11:30:00Z»
Тогда API возвращает статус <статус>
Примеры:
| время | статус |
| 2026-11-02T09:09:59Z | 409 |
| 2026-11-02T09:10:00Z | 201 |
| 2026-11-02T09:10:01Z | 201 |

@create @BR-03 @BR-04
Сценарий: Два конкурентных запроса на свободный интервал
Когда пользователи «user-a» и «user-b» одновременно резервируют «eq-042» с «2026-11-02T10:00:00Z» до «2026-11-02T11:00:00Z»
Тогда один запрос получает статус 201
И другой запрос получает статус 409 с кодом «EQUIPMENT_BUSY»
И для интервала существует ровно одно блокирующее бронирование
И личность победителя не фиксируется ожиданием

@confirm @BR-05 @BR-07
Сценарий: Подтверждение до истечения
Допустим мой резерв находится в состоянии HELD
И его срок истекает в «2026-11-02T09:10:00Z»
И серверное время равно «2026-11-02T09:09:59Z»
Когда я подтверждаю резерв
Тогда API возвращает статус 200
И состояние бронирования равно «CONFIRMED»
И бронирование продолжает блокировать интервал после «2026-11-02T09:10:00Z»

@confirm @BR-05
Сценарий: Подтверждение ровно на границе срока
Допустим мой резерв находится в состоянии HELD
И его срок истекает в «2026-11-02T09:10:00Z»
И серверное время равно «2026-11-02T09:10:00Z»
Когда я подтверждаю резерв
Тогда API возвращает статус 409
И код ошибки равен «RESERVATION_EXPIRED»
И резерв не блокирует оборудование

@cancel @BR-03 @BR-07
Структура сценария: Отмена освобождает интервал
Допустим моё бронирование «eq-042» с «2026-11-02T10:00:00Z» до «2026-11-02T11:00:00Z» имеет состояние «<состояние>»
И его срок резерва равен «2026-11-02T09:10:00Z»
Когда я отменяю бронирование
Тогда API возвращает статус 200
И состояние бронирования равно «CANCELLED»
Когда другой пользователь резервирует тот же интервал
Тогда API возвращает статус 201
Примеры:
| состояние |
| HELD |
| CONFIRMED |

@confirm @cancel @BR-07
Структура сценария: Повтор уже выполненной команды
Допустим моё бронирование имеет состояние «<состояние>»
Когда я выполняю команду «<команда>»
Тогда API возвращает статус 200
И состояние бронирования остаётся «<состояние>»
Примеры:
| состояние | команда |
| CONFIRMED | confirm |
| CANCELLED | cancel |

@confirm @BR-07
Сценарий: Отменённую бронь нельзя подтвердить
Допустим моё бронирование имеет состояние «CANCELLED»
Когда я подтверждаю резерв
Тогда API возвращает статус 409
И код ошибки равен «INVALID_STATE»

@cancel @BR-05
Сценарий: Истёкший резерв нельзя отменить
Допустим мой резерв находится в состоянии HELD
И его срок истекает в «2026-11-02T09:10:00Z»
И серверное время равно «2026-11-02T09:10:00Z»
Когда я отменяю бронирование
Тогда API возвращает статус 409
И код ошибки равен «RESERVATION_EXPIRED»

@confirm @cancel @BR-06
Структура сценария: Чужое и неизвестное бронирование не раскрываются
Допустим указан идентификатор «<вид>» бронирования
Когда я выполняю команду «<команда>»
Тогда API возвращает статус 404
И код ошибки равен «RESERVATION_NOT_FOUND»
И состояние чужих бронирований не изменяется
Примеры:
| вид | команда |
| чужого | confirm |
| чужого | cancel |
| неизвестного | confirm |
| неизвестного | cancel |

@create @BR-06
Сценарий: Запрос без действительной аутентификации
Допустим мой токен недействителен
Когда я создаю резерв «eq-042» с «2026-11-02T10:00:00Z» до «2026-11-02T11:00:00Z»
Тогда API возвращает статус 401
И код ошибки равен «UNAUTHENTICATED»

@create @BR-02 @BR-06
Сценарий: Нельзя передать владельца в теле запроса
Допустим остальные параметры создания резерва корректны
Когда я создаю резерв с дополнительным полем userId равным «user-b»
Тогда API возвращает статус 400
И код ошибки равен «INVALID_REQUEST»

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29 окт. 2026 г.

30.06.26 15:08 wendytaylor015

My name is Wendy Taylor, I'm from Los Angeles, i want to announce to you Viewer how Capital Crypto Recover help me to restore my Lost Bitcoin, I invested with a Crypto broker without proper research to know what I was hoarding my hard-earned money into scammers, i lost access to my crypto wallet or had your funds stolen? Don’t worry Capital Crypto Recover is here to help you recover your cryptocurrency with cutting-edge technical expertise, With years of experience in the crypto world, Capital Crypto Recover employs the best latest tools and ethical hacking techniques to help you recover lost assets, unlock hacked accounts, Whether it’s a forgotten password, Capital Crypto Recover has the expertise to help you get your crypto back. a security company service that has a 100% success rate in the recovery of crypto assets, i lost wallet and hacked accounts. I provided them the information they requested and they began their investigation. To my surprise, Capital Crypto Recover was able to trace and recover my crypto assets successfully within 24hours. Thank you for your service in helping me recover my $647,734 worth of crypto funds and I highly recommend their recovery services, they are reliable and a trusted company to any individuals looking to recover lost money. Contact email [email protected] OR Telegram @Capitalcryptorecover Call/Text Number +1 (336)390-6684 his contact: [email protected] His website: https://recovercapital.wixsite.com/capital-crypto-rec-1
02.07.26 01:22 Lieneke Bonnema

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02.07.26 01:26 Clara Morin

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04.07.26 15:32 Fraddy Pual

There are few companies I trust as much as FUNDSRETRIEVER. When I lost $653,000 in Ethereum to a ruthless scam, I thought my life would never be the same. The betrayal cut deep, but I refused to give up. I searched tirelessly for a legitimate way to recover what was stolen, and finally found FUNDSRETRIEVER—the most competent and compassionate recovery team I could have imagined. They handled my case with precision and care, and in the end, my entire ETH wallet was restored. More than the money, they gave me back my hope and happiness. I'm sharing my story because I want others to know that recovery is possible. If a scam has taken from you, don't hesitate—contact FUNDSRETRIEVER today. Email: FUNDSRETRIEVER1@ Gmail.com | WhatsApp: +1 603-512-1448 | Telegram: @FUNDSRETRIEVER
05.07.26 14:44 lydiassmith567

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05.07.26 14:44 lydiassmith567

HIRE A HACKER YOUR STOLEN CRYPTO RECOVERY / BTC / USDT / ETH WITH THE HELP OF CAPITAL CRYPTO RECOVER. I want to share my experience publicly regarding cryptocurrency wallet recovery, I highly recommend you to contact CAPITAL CRYPTO RECOVER, a professional private investigator in the Bitcoin world. They have a certified expert security team specializing in Bitcoin Recovery Services and have helped many people worldwide recover their lost funds. My wife and I were defrauded by an online manipulator posing as an experienced crypto investment professional. We lost $9.2 Million Stolen BTC in cryptocurrency and were left feeling homeless. After spending hours searching for a reliable crypto recovery service, I discovered CAPITAL CRYPTO RECOVER online. By patiently explaining my situation to their team, I was able to recover all my funds. Remarkably, my money was returned to my wallet in less than 24 hours. I am extremely grateful to CAPITAL CRYPTO RECOVER for their excellent assistance—they truly were a godsend in my difficult situation. If you have fallen victim to a cryptocurrency scam, you can reach CAPITAL CRYPTO RECOVER through the following channels Email: [email protected] OR Call/Text: +1 (336) 390-6684 Contact: [email protected] Website: https://recovercapital.wixsite.com/capital-crypto-rec-1
06.07.26 16:20 Olga Ognjanović

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06.07.26 16:31 Joseph Weigl

Invest wisely and stay cautious. Don't be influenced by promises of unusually high returns or convincing sales pitches from brokers. I learned this the hard way after falling victim to an investment scam that promised huge profits. Fortunately, I acted quickly and reported the incident to a recovery firm for assistance. Contact: Email: [email protected] Telegram: @Resqprofirm WhatsApp: +1 985 296 9146
06.07.26 16:33 Jaran Løvlien

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07.07.26 18:00 robertalfred175

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07.07.26 18:01 robertalfred175

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09.07.26 19:06 Toivo Walli

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09.07.26 19:10 Misty Alexander

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09.07.26 19:13 Clara Soto

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12.07.26 03:30 Kora Baltacha

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12.07.26 03:33 Pahal Mathew

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13.07.26 23:49 [email protected]

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15.07.26 11:53 Sarah Green

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15.07.26 11:58 Lily Gagné

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16.07.26 21:38 patricialovick86

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16.07.26 21:38 patricialovick86

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17.07.26 19:24 laimqq90

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17.07.26 20:12 martinsjude080

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18.07.26 17:12 Malthe Larsen

My experience with OKX has been deeply frustrating. For months, my account withdrawals were restricted with no explanation or resolution. Multiple emails to their support team were ignored, leaving me without answers or reassurance. This complete lack of communication shattered my trust. I ultimately regained access to my funds only through the help of a third-party recovery service, ResQProfirm. What should have been a reliable platform instead made me feel helpless and cut off from my own assets. [email protected], WhatsApp +19852969146, telegram @Resqprofirm
18.07.26 17:42 پریا رضایی

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18.07.26 17:46 Adem Akışık

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18.07.26 23:51 bernalzenaida

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19.07.26 04:10 Fraddy Pual

I can't thank Fundsretriever enough for everything they did for me. My name is Vanessa Conway, and I'm here to tell you my story of how I recovered money I never thought I'd see again. A few months ago, I put a significant amount of money into what looked like a genuine online investment company. At first, it felt real—they showed me fake profits and convinced me to invest even more. But when I tried to cash out, they went quiet and started asking for extra fees. That's when it hit me—I had been scammed. I was heartbroken, frustrated, and didn't know where to turn. That money was my savings—months of hard work gone. Then I found Fundsretriever online. I reached out, hoping for a miracle. Right away, their team made me feel heard. They were responsive, knowledgeable, and walked me through everything. They didn't just take my case—they took it seriously and kept me in the loop every step of the way. I finally felt like I had real experts fighting for me. And guess what? They actually got my money back. It wasn't instant, and it took teamwork, but it happened. When I saw those funds returned, I cried with joy. I'm sharing this so that anyone else out there who's been scammed knows—don't lose hope. Do your research before investing, and stay far away from platforms that promise too much too fast. And if you've already been stung, don't wait—get professional help immediately. Thank you, Fundsretriever, from the bottom of my heart. You didn't just recover my money—you restored my faith. — Vanessa Conway 📧 [email protected] 📱 WhatsApp: +16035121448 💬 Telegram: @Fundsretriever
19.07.26 19:53 kimberlyhebertt6877

I invested in bitcoin trading After losing $78.4 USDT) linked to a romance fraud scam worth of cryptocurrency through an online investment platform and later discovered it was a scam. After extensive research for recovery options, I contacted CAPITAL CRYPTO RECOVER based on positive client reviews and recommendations. Their professional security team guided me through the recovery process using advanced technology, and I was able to recover my lost cryptocurrency successfully. I am truly grateful for their support and assistance during such a difficult experience. I will advise you to contact CAPITAL CRYPTO RECOVER helped me recover my funds. For anyone facing similar issues, Website: https://recovercapital.wixsite.com/capital-crypto-rec-1 Email: [email protected] Telegram: @Capitalcryptorecover Contact: [email protected] Call/Text Number: +1 (336) 390-6684
19.07.26 19:53 kimberlyhebertt6877

I invested in bitcoin trading After losing $78.4 USDT) linked to a romance fraud scam worth of cryptocurrency through an online investment platform and later discovered it was a scam. After extensive research for recovery options, I contacted CAPITAL CRYPTO RECOVER based on positive client reviews and recommendations. Their professional security team guided me through the recovery process using advanced technology, and I was able to recover my lost cryptocurrency successfully. I am truly grateful for their support and assistance during such a difficult experience. I will advise you to contact CAPITAL CRYPTO RECOVER helped me recover my funds. For anyone facing similar issues, Website: https://recovercapital.wixsite.com/capital-crypto-rec-1 Email: [email protected] Telegram: @Capitalcryptorecover Contact: [email protected] Call/Text Number: +1 (336) 390-6684
19.07.26 19:54 kimberlyhebertt6877

I invested in bitcoin trading After losing $78.4 USDT) linked to a romance fraud scam worth of cryptocurrency through an online investment platform and later discovered it was a scam. After extensive research for recovery options, I contacted CAPITAL CRYPTO RECOVER based on positive client reviews and recommendations. Their professional security team guided me through the recovery process using advanced technology, and I was able to recover my lost cryptocurrency successfully. I am truly grateful for their support and assistance during such a difficult experience. I will advise you to contact CAPITAL CRYPTO RECOVER helped me recover my funds. For anyone facing similar issues, Website: https://recovercapital.wixsite.com/capital-crypto-rec-1 Email: [email protected] Telegram: @Capitalcryptorecover Contact: [email protected] Call/Text Number: +1 (336) 390-6684
30.07.26 00:04 Ahmed

A really cool analysis, thank you. I was especially struck by how strictly the order is defined: data processing and formatting come first, with color only at the very end. This really saves you from the typical mistake of "first a pretty palette, then we figure out what the chart is for." And the palette validator with OKLCH + colorblindness check is absolutely fantastic; you almost never see that in regular tools. By the way, while reading about rank-trajectory and the logarithmic scale, I immediately remembered how convenient it is to analyze dynamics on charts in ExpertOption—I've been trading there for quite some time now. When the data is well visualized, decisions are noticeably easier and more relaxed. I also liked the point about "no more than eight colors" and the dual-axis ban. Strict restrictions sometimes actually produce better results than complete freedom. I'll try this approach myself.
30.07.26 17:27 wendytaylor015

My name is Wendy Taylor, I'm from Los Angeles, i want to announce to you Viewer how Capital Crypto Recover help me to restore my Lost Bitcoin, I invested with a Crypto broker without proper research to know what I was hoarding my hard-earned money into scammers, i lost access to my crypto wallet or had your funds stolen? Don’t worry Capital Crypto Recover is here to help you recover your cryptocurrency with cutting-edge technical expertise, With years of experience in the crypto world, Capital Crypto Recover employs the best latest tools and ethical hacking techniques to help you recover lost assets, unlock hacked accounts, Whether it’s a forgotten password, Capital Crypto Recover has the expertise to help you get your crypto back. a security company service that has a 100% success rate in the recovery of crypto assets, i lost wallet and hacked accounts. I provided them the information they requested and they began their investigation. To my surprise, Capital Crypto Recover was able to trace and recover my crypto assets successfully within 24hours. Thank you for your service in helping me recover my $647,734 worth of crypto funds and I highly recommend their recovery services, they are reliable and a trusted company to any individuals looking to recover lost money. Contact email [email protected] OR Telegram @Capitalcryptorecover Call/Text Number +1 (336)390-6684 his contact: [email protected] His website: https://recovercapital.wixsite.com/capital-crypto-rec-1
30.07.26 17:27 wendytaylor015

My name is Wendy Taylor, I'm from Los Angeles, i want to announce to you Viewer how Capital Crypto Recover help me to restore my Lost Bitcoin, I invested with a Crypto broker without proper research to know what I was hoarding my hard-earned money into scammers, i lost access to my crypto wallet or had your funds stolen? Don’t worry Capital Crypto Recover is here to help you recover your cryptocurrency with cutting-edge technical expertise, With years of experience in the crypto world, Capital Crypto Recover employs the best latest tools and ethical hacking techniques to help you recover lost assets, unlock hacked accounts, Whether it’s a forgotten password, Capital Crypto Recover has the expertise to help you get your crypto back. a security company service that has a 100% success rate in the recovery of crypto assets, i lost wallet and hacked accounts. I provided them the information they requested and they began their investigation. To my surprise, Capital Crypto Recover was able to trace and recover my crypto assets successfully within 24hours. Thank you for your service in helping me recover my $647,734 worth of crypto funds and I highly recommend their recovery services, they are reliable and a trusted company to any individuals looking to recover lost money. Contact email [email protected] OR Telegram @Capitalcryptorecover Call/Text Number +1 (336)390-6684 his contact: [email protected] His website: https://recovercapital.wixsite.com/capital-crypto-rec-1
31.07.26 16:21 rssllhrnsb

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01.08.26 15:05 keithwilson9899

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01.08.26 15:05 keithwilson9899

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03.08.26 20:05 Philip

I was a victim of a crypto theft involving a Pink Drainer, which resulted in the theft of my Wrapped Bitcoin (WBTC) from my Polygon network. The experience was incredibly frustrating and distressing, as I had no idea how to recover my funds. Unfortunately, by the time I noticed the theft, the funds had already been drained to an address that I had no control over, making it seem like an irreversible situation.The attack happened when I clicked on what appeared to be a legitimate link. I didn’t realize at the time that it was a phishing attempt designed to siphon off my private keys and access my wallet. The Pink Drainer, a type of malicious script used by attackers, is specifically designed to exploit such vulnerabilities in crypto wallets. The moment I realized that my WBTC had been drained from my Polygon network. I felt completely helpless, as I didn’t have direct access to the thief's address, and there was no way to reverse the transaction on my own at that point, I started searching for ways to recover my funds, but most resources only offered generic advice that wasn’t practical in this particular case. I quickly realized that if I wanted to have any hope of getting my assets back, I would need professional assistance. After some research, I came across a reliable and trusted recovery team called Aspen Recovery Experts. Their expertise in cryptocurrency recovery, especially in cases like mine, seemed promising.I decided to reach out to Aspen Recovery Experts, and I’m incredibly grateful that I did. Their team of crypto recovery experts was able to help me trace the stolen funds and identify the path the funds took after they left my wallet. Using advanced tools and techniques, they were able to track the transactions on the blockchain, helping me understand where my WBTC had been sent. More importantly, they worked tirelessly to assist me in contacting the necessary parties and even interfaced with blockchain analysts to help facilitate the recovery process.Thanks to their efforts, I was able to successfully recover my stolen funds. The entire process took some time, but the Aspen Recovery Experts dedicated team provided regular updates and kept me informed throughout the process, which gave me a sense of hope and relief during an otherwise stressful time. If you’re ever in a similar situation, I highly recommend reaching out to a trusted recovery team like Aspen Recovery Expertshhh . Their professionalism, knowledge, and expertise were critical in helping me recover my funds and regain control of my crypto assets. Whatsapp : +1 747 231 9036 Telegram : @ prohackerspy Email : [email protected]
03.08.26 20:06 Philip

I was a victim of a crypto theft involving a Pink Drainer, which resulted in the theft of my Wrapped Bitcoin (WBTC) from my Polygon network. The experience was incredibly frustrating and distressing, as I had no idea how to recover my funds. Unfortunately, by the time I noticed the theft, the funds had already been drained to an address that I had no control over, making it seem like an irreversible situation.The attack happened when I clicked on what appeared to be a legitimate link. I didn’t realize at the time that it was a phishing attempt designed to siphon off my private keys and access my wallet. The Pink Drainer, a type of malicious script used by attackers, is specifically designed to exploit such vulnerabilities in crypto wallets. The moment I realized that my WBTC had been drained from my Polygon network. I felt completely helpless, as I didn’t have direct access to the thief's address, and there was no way to reverse the transaction on my own at that point, I started searching for ways to recover my funds, but most resources only offered generic advice that wasn’t practical in this particular case. I quickly realized that if I wanted to have any hope of getting my assets back, I would need professional assistance. After some research, I came across a reliable and trusted recovery team called Aspen Recovery Experts. Their expertise in cryptocurrency recovery, especially in cases like mine, seemed promising.I decided to reach out to Aspen Recovery Experts, and I’m incredibly grateful that I did. Their team of crypto recovery experts was able to help me trace the stolen funds and identify the path the funds took after they left my wallet. Using advanced tools and techniques, they were able to track the transactions on the blockchain, helping me understand where my WBTC had been sent. More importantly, they worked tirelessly to assist me in contacting the necessary parties and even interfaced with blockchain analysts to help facilitate the recovery process.Thanks to their efforts, I was able to successfully recover my stolen funds. The entire process took some time, but the Aspen Recovery Experts dedicated team provided regular updates and kept me informed throughout the process, which gave me a sense of hope and relief during an otherwise stressful time. If you’re ever in a similar situation, I highly recommend reaching out to a trusted recovery team like Aspen Recovery Expertshhh . Their professionalism, knowledge, and expertise were critical in helping me recover my funds and regain control of my crypto assets. Whatsapp : +1 747 231 9036 Telegram : @ prohackerspy Email : [email protected]
04.08.26 11:05 Kisnoles

Excellent analysis, thank you. I was particularly struck by how rigidly the skill sets the order: data processing and form come first, with color coming last. This really cures the habit of "first a pretty palette, then we'll figure it out." A palette validator using OKLCH + color blindness + WCAG is something most chart generators lack. And regarding the boundaries of competence, it's very clear. Where there's a self-checking loop (color), you delegate freely. Where there's a heuristic (form, data interpretation), you remain the final filter. This is a universal principle, not just for /dataviz. By the way, when you look at trading dashboards (including those of decent platforms like ExpertOption), it's immediately clear who thought about readability and who just threw in rainbow lines. Tools like this skill could greatly improve the quality of analytics. Thanks again for the detailed analysis – saved.
04.08.26 12:37 kimberlyhebertt6877

I invested in bitcoin trading After losing $78.4 USDT) linked to a romance fraud scam worth of cryptocurrency through an online investment platform and later discovered it was a scam. After extensive research for recovery options, I contacted CAPITAL CRYPTO RECOVER based on positive client reviews and recommendations. Their professional security team guided me through the recovery process using advanced technology, and I was able to recover my lost cryptocurrency successfully. I am truly grateful for their support and assistance during such a difficult experience. I will advise you to contact CAPITAL CRYPTO RECOVER helped me recover my funds. For anyone facing similar issues, Website: https://recovercapital.wixsite.com/capital-crypto-rec-1 Email: [email protected] Telegram: @Capitalcryptorecover Contact: [email protected] Call/Text Number: +1 (336) 390-6684
04.08.26 12:37 kimberlyhebertt6877

I invested in bitcoin trading After losing $78.4 USDT) linked to a romance fraud scam worth of cryptocurrency through an online investment platform and later discovered it was a scam. After extensive research for recovery options, I contacted CAPITAL CRYPTO RECOVER based on positive client reviews and recommendations. Their professional security team guided me through the recovery process using advanced technology, and I was able to recover my lost cryptocurrency successfully. I am truly grateful for their support and assistance during such a difficult experience. I will advise you to contact CAPITAL CRYPTO RECOVER helped me recover my funds. For anyone facing similar issues, Website: https://recovercapital.wixsite.com/capital-crypto-rec-1 Email: [email protected] Telegram: @Capitalcryptorecover Contact: [email protected] Call/Text Number: +1 (336) 390-6684
06.08.26 08:11 ROMMYHENDERSON344

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06.08.26 13:56 lydiassmith567

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11.08.26 03:43 raymont0714

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12.08.26 16:37 rssllhrnsb

I learned an important lesson after investing in what appeared to be a genuine opportunity. Unfortunately, I was unable to access my funds, which reinforced the importance of carrying out thorough due diligence, checking whether an investment is appropriately regulated, and seeking qualified professional advice rather than relying solely on online reviews or testimonials. During the process of addressing my case, I worked with Mrs. Tatiana Sorina , who communicated clearly, provided regular updates, and handled the matter in a professional manner. According to my experience, I have recovered $50,000 so far, while efforts to resolve the remaining balance are still in progress. If you wish to contact her, the details I used are: Mrs. Tatiana Sorina TEXT : (tatianasorina06 at G_Ma IL dot ..c 0 m)…. Before committing money to any investment, take time to verify the legitimacy of the platform, confirm any relevant regulatory authorisations, and avoid investing more than you can comfortably afford to lose.
16.08.26 01:44 Matt Kegan

CapitalNode Analytics. They help to investigate and recover stolen digital assets from fake trading platforms. Great firm i must say.
18.08.26 04:59 marcushenderson624

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18.08.26 04:59 marcushenderson624

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19.08.26 14:50 BAYER7043

My account was locked, and I couldn’t access my own information until [email protected] +447476618364 whats?up? helped me recover it. This lady hacker was kind and professional, but this experience showed me how risky account lockouts can be. If you’re facing the same problem, do not panic consult her A. S. A. P. Be careful with recovery agents outchea, and research their name, business, and reviews before sharing any details. Never send passwords, security codes, banking information, or copies of your ID unless you’ve confirmed who you’re dealing with. Be wary of promises that sound too good to be true, especially claims that require little information or guarantee instant access with outrageous fees.
20.08.26 11:32 michaeldavenport218

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20.08.26 11:32 michaeldavenport218

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23.08.26 20:02 leslieyee

Excellent analysis by /dataviz! I was particularly struck by how strictly the order is defined: "data meaning first, color last" and how the validator actually adjusts the palette according to OKLCH, color blindness, and WCAG standards. These rules greatly improve the quality of charts. By the way, a similar approach to clean and legible charts is highly valued in trading—for example, on the ExpertOption platform, the interface and price visualization are designed to ensure information is read instantly and without unnecessary noise.
25.08.26 13:44 lydiassmith567

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25.08.26 13:44 lydiassmith567

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30.08.26 15:37 [email protected]

Discovering I had been defrauded, I searched online for services claiming to recover stolen ETH. I contacted several companies, but none succeeded. Although some claimed they could trace assets or recover funds, I could not verify their success or recover my money. I later found SYLVESTER BRYANT Recovery through Google. After contacting him, he recovered 450,000,00. He can be reached at [email protected] or WhatsApp at +1 512 577 7957.
30.08.26 15:37 [email protected]

Discovering I had been defrauded, I searched online for services claiming to recover stolen ETH. I contacted several companies, but none succeeded. Although some claimed they could trace assets or recover funds, I could not verify their success or recover my money. I later found SYLVESTER BRYANT Recovery through Google. After contacting him, he recovered 450,000,00. He can be reached at [email protected] or WhatsApp at +1 512 577 7957.
01.09.26 11:16 lisawerth897

My Experience With Cryptocurrency — CAPITAL CRYPTO RECOVER I lost over $82,000 in Bitcoin after falling victim to a fraudulent online investment scheme. After realizing I had been scammed, I spent considerable time researching possible ways to recover my funds. During my research, I came across CAPITAL CRYPTO RECOVER and decided to contact them after reading their reported success record and encouraging client positive reviews and testimonials. Their team guided me through the recovery process, and I was grateful to successfully recover my lost cryptocurrency. The experience was challenging, but I appreciated the assistance and support I received throughout the process. I’m sharing my experience in the hope that it may encourage other victims to carefully research their options and verify any recovery service before proceeding. I will forever be thankful to you CAPITAL CRYPTO RECOVER 📧 [email protected] 🌐 Website: recovercapital.wixsite.com/capital-crypto-rec-1 📧 [email protected] 📞 Call/WhatsApp: +1 (336) 390-6684
01.09.26 11:16 lisawerth897

My Experience With Cryptocurrency — CAPITAL CRYPTO RECOVER I lost over $82,000 in Bitcoin after falling victim to a fraudulent online investment scheme. After realizing I had been scammed, I spent considerable time researching possible ways to recover my funds. During my research, I came across CAPITAL CRYPTO RECOVER and decided to contact them after reading their reported success record and encouraging client positive reviews and testimonials. Their team guided me through the recovery process, and I was grateful to successfully recover my lost cryptocurrency. The experience was challenging, but I appreciated the assistance and support I received throughout the process. I’m sharing my experience in the hope that it may encourage other victims to carefully research their options and verify any recovery service before proceeding. I will forever be thankful to you CAPITAL CRYPTO RECOVER 📧 [email protected] 🌐 Website: recovercapital.wixsite.com/capital-crypto-rec-1 📧 [email protected] 📞 Call/WhatsApp: +1 (336) 390-6684
01.09.26 17:34 Garry42

Really crazy world. These fraudsters go at any length to steal your hard earned funds. I have been a victim of a bitcoin scam about 7 months back. A Con artist gained access to my cashapp account through a phishing scam. They stole $409,000. I was really devastated. I did everything to get back my funds by contacting the FBI but they claimed there was nothing they could do. A friend told me about a recovery expert. He helps fight against various phishing and investment scams and they were able to help trace and recover my funds even though it took over 2 days. you can reach out to him through recoverydarek@gmail. com . I can guarantee his services are still active.
01.09.26 17:34 Garry42

Really crazy world. These fraudsters go at any length to steal your hard earned funds. I have been a victim of a bitcoin scam about 7 months back. A Con artist gained access to my cashapp account through a phishing scam. They stole $409,000. I was really devastated. I did everything to get back my funds by contacting the FBI but they claimed there was nothing they could do. A friend told me about a recovery expert. He helps fight against various phishing and investment scams and they were able to help trace and recover my funds even though it took over 2 days. you can reach out to him through recoverydarek@gmail. com . I can guarantee his services are still active.
02.09.26 03:43 kimberlyhebertt6877

I invested in bitcoin trading After losing $78.4 USDT) linked to a romance fraud scam worth of cryptocurrency through an online investment platform and later discovered it was a scam. After extensive research for recovery options, I contacted CAPITAL CRYPTO RECOVER based on positive client reviews and recommendations. Their professional security team guided me through the recovery process using advanced technology, and I was able to recover my lost cryptocurrency successfully. I am truly grateful for their support and assistance during such a difficult experience. I will advise you to contact CAPITAL CRYPTO RECOVER helped me recover my funds. For anyone facing similar issues, Website: https://recovercapital.wixsite.com/capital-crypto-rec-1 Email: [email protected] Telegram: @Capitalcryptorecover Contact: [email protected] WhatsApp/Text Number: +1 (336) 390-6684
02.09.26 03:43 kimberlyhebertt6877

I invested in bitcoin trading After losing $78.4 USDT) linked to a romance fraud scam worth of cryptocurrency through an online investment platform and later discovered it was a scam. After extensive research for recovery options, I contacted CAPITAL CRYPTO RECOVER based on positive client reviews and recommendations. Their professional security team guided me through the recovery process using advanced technology, and I was able to recover my lost cryptocurrency successfully. I am truly grateful for their support and assistance during such a difficult experience. I will advise you to contact CAPITAL CRYPTO RECOVER helped me recover my funds. For anyone facing similar issues, Website: https://recovercapital.wixsite.com/capital-crypto-rec-1 Email: [email protected] Telegram: @Capitalcryptorecover Contact: [email protected] WhatsApp/Text Number: +1 (336) 390-6684
04.09.26 21:51 Kovengray

Recovering your lost investment funds as the case might be, is not what you can do alone, you’d require the service of a trained recovery specialist. A recovery specialist is a person or a group of people who are well equipped to work around the brokerage network. They have vast knowledge about the whole network and have the right software and private keys to follow any transaction. I was ripped off trading online to an investment broker, good thing I got every penny back through the help of Gavin ray he’s a genius Contact : Gavinray78 at gmail com or WhatsApp +1 352 322 2096 It is also important to be patient and really calm during the process.
05.09.26 21:38 [email protected]

I invested 45,000 Euro, and later aggreviated to 198,000 Euro. I requested to place ‎Withdrawal of my funds to be paid to my Bank account. But nothing happened I was subjected to pay more fee until I can get my funds on my account, i got in touch with Theodore ryan here on this platform who had helped a lot of people, I followed all instructions and he legally got back my withheld funds, I got threatened by the company that if I don’t pay they will get my account frozen, all thanks to Theodore ryan and I highly recommend him to anyone dealing with an unregulated broker company… contact him on his Gmail - theodoreryan318@ gmail . com
09.09.26 21:31 lisawerth897

My Experience With Cryptocurrency — CAPITAL CRYPTO RECOVER I lost over $82,000 in Bitcoin after falling victim to a fraudulent online investment scheme. After realizing I had been scammed, I spent considerable time researching possible ways to recover my funds. During my research, I came across CAPITAL CRYPTO RECOVER and decided to contact them after reading their reported success record and encouraging client positive reviews and testimonials. Their team guided me through the recovery process, and I was grateful to successfully recover my lost cryptocurrency. The experience was challenging, but I appreciated the assistance and support I received throughout the process. I’m sharing my experience in the hope that it may encourage other victims to carefully research their options and verify any recovery service before proceeding. I will forever be thankful to you CAPITAL CRYPTO RECOVER 📧 [email protected] 🌐 Website: recovercapital.wixsite.com/capital-crypto-rec-1 📧 [email protected] 📞 Call/WhatsApp: +1 (336) 390-6684
09.09.26 21:31 lisawerth897

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06.10.26 06:13 melissathomason573

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06.10.26 17:44 Darrell1717

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11.10.26 03:04 Patricia014

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13.10.26 14:14 lisalisa22

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13.10.26 14:14 lisalisa22

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17.10.26 12:58 melissathomason573

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17.10.26 12:58 melissathomason573

Professional Crypto Recovery Testimonial After losing a significant amount of cryptocurrency through a scam on Twitter, I was unsure whether my Bitcoin funds could ever be recovered. The experience was extremely stressful, particularly because I encountered several individuals and services claiming they could help recover my assets, only to discover that some were fraudulent themselves. A friend eventually referred me to CAPITAL CRYPTO RECOVER. Their team handled my case professionally, discreetly, and efficiently. With their assistance, I successfully recovered approximately $130,000 worth of USDT in just over a week. My experience taught me the importance of being extremely cautious when seeking cryptocurrency recovery services, as scammers often target victims a second time. I am grateful to CAPITAL CRYPTO RECOVER for the assistance I received and wanted to share my experience with others who may be facing a similar situation. If you’ve been compromised, don’t lose hope—and be careful of fraudsters posing as saviors. CAPITAL CRYPTO RECOVER are real professionals in crypto recovery. I am a living proof of their effectiveness, you can reach them through Phone (Call/WhatsApp): +1 (336) 390-6684 Email: [email protected] Alternate Email: [email protected] Website: https://recovercapital.wixsite.com/capital-crypto-rec-1
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25.10.26 14:35 lydiasmitth456

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25.10.26 14:35 lydiasmitth456

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27.10.26 01:58 KATHLEEN

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27.10.26 02:22 kimberlyhebertt6877

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27.10.26 02:22 kimberlyhebertt6877

I invested in bitcoin trading After losing $78.4 USDT) linked to a romance fraud scam worth of cryptocurrency through an online investment platform and later discovered it was a scam. After extensive research for recovery options, I contacted CAPITAL CRYPTO RECOVER based on positive client reviews and recommendations. Their professional security team guided me through the recovery process using advanced technology, and I was able to recover my lost cryptocurrency successfully. I am truly grateful for their support and assistance during such a difficult experience. I will advise you to contact CAPITAL CRYPTO RECOVER helped me recover my funds. For anyone facing similar issues, Website: https://recovercapital.wixsite.com/capital-crypto-rec-1 Email: [email protected] Telegram: @Capitalcryptorecover Contact: [email protected] WhatsApp/Text Number: +1 (336) 390-6684
27.10.26 02:25 KATHLEEN

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