chore: upgrade Node to 24 LTS

Enable strict TypeScript and reject non-null and definite-assignment assertions. Declare externally populated DTO fields, preserve runtime validation, and narrow values at their owners.

Verified: backend verify (257 tests), unchanged OpenAPI, and 21 SQLite/HTTP tests on retry. The initial SQLite run had two timeouts; baseline HEAD passed 21 tests as well.

.ai/CONVENTIONS.md

@@ -6,12 +6,13 @@
 
 | Решение / сигнал | Читать |
 | --- | --- |
-| Новый module/provider/service; бизнес-логика; перенос responsibility | [Architecture](conventions/backend-architecture.md) |
+| Новый файл/suffix/layer; поиск feature owner; progressive structure; перенос responsibility | [Architecture](conventions/backend-architecture.md) |
+| TS vocabulary, domain literals, magic values | [Domain literals](conventions/backend-architecture.md#domain-literals-and-magic-values) |
 | Controller, DTO, route/status, validation/exception, публичная HTTP-семантика | [HTTP API](conventions/backend-http-api.md) |
-| Prisma/schema/query/persistence, transaction, migration, atomic write | [Data](conventions/backend-data.md) |
+| Repository/data access; Prisma/schema/query, transaction, migration, atomic write | [Data](conventions/backend-data.md) |
 | Тесты или behavior с testing risk | [Testing](conventions/backend-testing.md) |
 | JWT, cookie, login/refresh/logout, guard/access, token encryption, sensitive logs | [Security](conventions/security-auth.md) |
-| T-Bank/gRPC/proto, upstream retry/rate limit/cache, MoexClient | [Integrations](conventions/backend-integrations.md) |
+| External client/integration boundary; T-Bank/gRPC/proto, retry/rate limit/cache | [Integrations](conventions/backend-integrations.md) |
 | Logging/request context без изменения secrets/auth | [Logging](conventions/backend-architecture.md#logging) |
 | Новый abstraction/dependency, refactor, неясный scope | [Общий выбор реализации](../../docs/development/engineering-governance.md#выбор-реализации) |
 | Изменение request/response/route/status/error shape или Swagger metadata | HTTP API + [общий contract workflow](../../docs/development/runtime-openapi-verification.md) |

.ai/conventions/backend-architecture.md

@@ -1,39 +1,257 @@
 # Backend architecture
 
-## Выбор владельца
+## Module-first organization
 
-Найди существующий use case, его collaborators и tests до создания module/service.
-Сохрани ответственность в текущем module, если новая возможность относится к нему.
-Module — граница связного набора providers, а не папка для каждого endpoint.
+Backend — domain-oriented modular monolith с лёгким разделением
+по ответственности. `src/modules` группирует код по бизнес-возможности: `auth`, `banking/bank-cards`, области `investments`.
+В инвестициях отдельные Nest modules владеют `brokerage-accounts`, `portfolio`,
+`operations`, `income`, `upcoming-events`, `instruments`, `tbank-connection`.
+`instruments/stocks` и `instruments/bonds` — slices внутри одного модуля.
 
-| Решение | Owner |
+### Progressive structure
+
+Три уровня организации: business module → responsibility layer → technical grouping
+при реальной необходимости. Компактный module с понятными controller/DTO/service
+может оставаться плоским. Ориентир 5–7 файлов не является порогом: учитывай число
+ответственностей, наличие domain/repository/use cases и удобство просмотра каталога.
+
+Когда в module смешаны несколько services, transport, расчёты и persistence,
+группируй файлы по ответственности:
+
+```text
+feature/
+├── feature.module.ts
+├── feature.api.ts          # только при существующих внешних потребителях
+├── presentation/           # HTTP, DTO, guards
+├── application/            # сценарии, orchestration, application input
+├── domain/                 # чистые бизнес-правила и расчёты
+└── infrastructure/         # persistence, framework и boundary mapping
+```
+
+Создавай только нужные слои. В корне сложного module оставляй composition и
+публичную boundary; production code и colocated tests размещай в слое владельца.
+Внутри business slice действует то же правило, без отдельного Nest module ради папок.
+`controllers/`, `dto/`, `services/`, `use-cases/`, `persistence/`, `mappers/`
+допустимы только внутри слоя, когда множество однотипных файлов мешает навигации.
+Для одного controller или пары DTO дополнительная поддиректория не нужна.
+Пустые папки, новые barrels, CQRS и interfaces не требуются для этой организации.
+
+В текущем коде слои используют `auth`, `bank-cards`, `portfolio`, `operations`
+и slices `instruments/stocks`, `instruments/bonds`. Общие application helpers
+инструментов находятся в `instruments/application`; `instruments.module.ts`
+компонует оба slice. `stock-position.ts` и `instrument-position.ts` формируют
+результат из portfolio DTO; `instrument-market.ts` обрабатывает внешние данные
+и ошибки Nest. Это application code, а не независимая domain model.
+`brokerage-accounts`, `income`, `upcoming-events`, `tbank-connection` остаются
+компактными плоскими modules. Наличие tests само по себе не требует слоёв.
+
+## Поиск и создание файла
+
+При работе над feature проходи владельцев в порядке:
+
+1. Найди business module.
+2. Прочитай его `*.module.ts` (для slice — composition родительского module).
+3. Проверь `presentation/`: controller и transport contract.
+4. Проследи вызовы в `application/`: сценарии и services.
+5. Проверь используемые правила в `domain/`.
+6. Проверь `infrastructure/`: repository и технические реализации.
+7. По обнаруженным зависимостям переходи в `integrations/` и `common/`.
+
+В плоском module классифицируй файлы по suffix и следуй их ответственности.
+Отсутствующий слой пропускай. Если business owner известен, начинай локально,
+а не с repository-wide search.
+
+**Rule of locality:** code that belongs to one business capability stays inside
+that capability unless it is cross-cutting. Например, расчёты карт принадлежат
+bank-cards/domain, даже если реализованы обычными функциями.
+
+Перед созданием файла определи:
+
+1. Какой business module владеет изменением? Сначала owner, затем common при
+   подтверждённой общей потребности.
+2. Какова ответственность: HTTP/DTO/guard → presentation; сценарий/orchestration →
+   application; чистое business rule/calculation → domain; persistence или
+   module-specific technical implementation → infrastructure; внешний протокол → integrations.
+3. Какой approved suffix из таблицы соответствует этой ответственности?
+4. Какой слой владеет файлом? В компактном плоском module сохрани размещение рядом
+   с owner; в слоистом используй соответствующий слой.
+5. Достаточно ли colocate файл рядом с существующими? Level 3 grouping создавай
+   только при заметном улучшении навигации по множеству однотипных файлов.
+
+Если owner или роль не определены, сначала установи ответственность. Generic
+`utils.ts`, `helpers.ts`, `manager.ts`, `handler.ts` и arbitrary directory её не заменяют.
+
+## Naming & File Suffix Convention
+
+Имена файлов — `kebab-case`. File suffix определяет responsibility, directory
+определяет architectural layer. Размещение в таблице предпочтительно для
+слоистого module; компактный плоский module сохраняет файлы в корне.
+Cross-module consumers во всех строках ограничены публичной границей ниже.
+
+| Suffix | Когда использовать | Где | Кто зависит | Когда не использовать |
+| --- | --- | --- | --- | --- |
+| `*.controller.ts` | HTTP endpoint / transport | presentation | Nest wiring | DB, расчёты, SDK, сложная оркестрация |
+| `*.dto.ts` | Request/response, validation, OpenAPI | presentation | Controller; application boundary при совпадении shape | Универсальная domain model |
+| `*.use-case.ts` | Один самостоятельный application scenario | application | Controller, другой orchestrator | Prisma queries, Request/Response, SDK implementation |
+| `*.service.ts` | Конкретная cohesive reusable capability | рядом с owner; application/domain/integration по роли | Сценарии и services; domain — только от чистого domain service | Свалка несвязанных сценариев |
+| `*.repository.ts` | Persistence queries и согласованные DB reads/writes | infrastructure | Application service/use case | Domain calculations, HTTP request, external transport |
+| `*.client.ts` | Низкоуровневый внешний HTTP/gRPC/SDK | integrations или infrastructure | Application orchestration, boundary mapper | Пользовательский lifecycle и domain rules |
+| `*.mapper.ts` | Meaningful conversion между моделями | обычно infrastructure у преобразуемой boundary | Код соответствующей boundary | Формальное копирование нескольких одинаковых полей |
+| `*.policy.ts` | Cohesive decision rule | domain/application/integration по входным данным | Владелец правила; domain — от чистой policy | Persistence, transport, generic strategy |
+| `*.guard.ts` | Nest guard | presentation | Nest/controller | Основная account authorization и финансовые правила |
+| `*.strategy.ts` | Framework strategy, например JWT | infrastructure | Framework wiring | Обычный service без strategy contract |
+| `*.module.ts` | Nest imports/providers/controllers/exports | module root | Composition root, importing module | Бизнес-логика |
+| `*.types.ts` | Малая группа связанных TS types | рядом с owner | Потребители модели на разрешённых слоях | Глобальные types всего module, runtime validation |
+| `*.api.ts` | Явный список публичных exports | root конкретного module/integration | Другие modules | DTO/client/service implementation или generic API logic |
+| `*-input.ts` | Application input: нормализация и проверка формы, отличающейся от wire DTO | application | Application code | Копия DTO под новым именем; вариант `*.input.ts` |
+| `*.calculations.ts`, `*.rules.ts` или предметное имя | Чистые бизнес-расчёты, value semantics | domain | Application и domain | Nest/Prisma/HTTP/SDK зависимости |
+| `*.spec.ts` | Существующая unit/component проверка поведения | рядом с owner/slice | Test runner | Архитектурные проверки папок и trivial wiring |
+
+`bank-card-input.ts` использует выбранный `*-input.ts`: переводит Money в
+копейки, нормализует значения и проверяет application input. DTO не дублируется
+отдельным Input type. `rub-money.ts` — domain-правила RUB; `bond-money.mapper.ts`
+— преобразование ответа клиента. Эти роли не определяются словом money в имени.
+
+Технические framework suffixes (`*.filter.ts`, `*.middleware.ts`,
+`*.decorator.ts`, `*.config.ts`, `*.validation.ts`) сохраняют соответствующие
+существующие роли в common/config. `tbank.crypto.ts` — локальная реализация
+шифрования токена; имя не является разрешением создавать generic crypto layer.
+HTTP/e2e naming и расположение — в [Testing](backend-testing.md).
+
+Без зафиксированной необходимости не вводи `*.helper.ts`, `*.utils.ts`,
+`*.manager.ts`, `*.processor.ts`, `*.handler.ts`, `*.provider.ts`, `*.factory.ts`.
+Новая naming convention сначала получает конкретную роль и обоснование здесь.
+Для data access выбран только `*.repository.ts`, не persistence/store/dao.
+
+## Публичные границы
+
+`*.module.ts` задаёт DI boundary; `*.api.ts` перечисляет используемые другими
+модулями providers, функции и типы. Внешний production import идёт через этот
+API или файл Nest module. Чистый `integrations/tbank/decimal.ts` — отдельный
+публичный вход для protobuf conversion: импорт арифметики не загружает DI/Prisma.
+Внутри модуля используй прямые локальные импорты.
+Tests могут импортировать внутренний owner для проверки поведения и mocks.
+Новый export требует текущего потребителя; controller и persistence остаются
+приватными. Не добавляй `index.ts` на каждом уровне.
+
+Каждый provider регистрируется у одного владельца. Потребители импортируют
+его module, а не повторяют provider: это сохраняет единственный кэш и лимитер.
+`AuthModule` экспортирует guard; наличие JWT не заменяет account access check.
+
+- `income` читает операции через `operations.api.ts`.
+- `instruments` получает личные позиции через `portfolio.api.ts`.
+- `tbank-connection` использует T-Bank integration и публичный сброс портфеля.
+- `portfolio` и другие инвестиционные модули используют `TbankModule`, который
+  не зависит от business modules. Так управление подключением не образует цикл.
+- `investment-calendar.ts` и `account-reference.dto.ts` разделяются только
+  инвестиционными областями; это не глобальная библиотека бизнес-правил.
+
+## Ответственность и направление зависимостей
+
+| Владелец | Ответственность |
 | --- | --- |
-| Route, request/response mapping, status/cookie | Controller, [HTTP rules](backend-http-api.md) |
-| Business use case, orchestration, domain validation | Feature service |
-| Input shape/format | DTO + configured ValidationPipe |
-| Атомарность/DB query | Сервис use case через PrismaService, [Data](backend-data.md) |
-| Внешний protocol, deadline/retry/limiting | Existing client, [Integrations](backend-integrations.md) |
-| Чистое вычисление/mapper без lifecycle и DI | Обычная функция рядом с domain owner |
-| Bootstrap/config/global cross-cutting concern | AppModule, config, существующий common owner |
+| Controller / presentation | Route, verified identity, transport DTO, validation, status/cookie; вызов сценария |
+| Use case / application service | Оркестрация, business validation, доступ и согласованность результата |
+| Domain | Чистые правила и расчёты; без NestJS, Prisma, HTTP/Swagger и внешних SDK |
+| Persistence / infrastructure | Запросы, транзакции, технические реализации границ |
+| `src/integrations/{tbank,moex,ncr}` | Внешние протоколы, декодирование, retry/deadline/cache; без зависимостей от HTTP DTO business modules |
+| `src/prisma` | Общий DB provider и lifecycle; не generic repository |
 
-**Безопасный путь:** расширь текущий owner; выделяй collaborator, когда он скрывает
-самостоятельный инвариант или координацию. Не вводи CQRS, generic repository,
-interface с одной реализацией или base controller только ради шаблона Nest.
-Не превращай common в хранилище бизнес-логики и не переноси frontend модели сюда.
+Основной вызов: presentation → application → domain; application использует
+конкретные infrastructure providers, зарегистрированные module. Infrastructure
+может использовать application types/input и domain rules; новые interfaces
+ради инверсии зависимостей не обязательны. Domain не импортирует presentation или
+infrastructure. Существующие связные CRUD/transaction services могут сохранять прямые queries
+по [Data](backend-data.md); use case получает данные через repository и сам
+Prisma queries не выполняет. Entity/interface на каждую таблицу не требуется.
+DTO остаются транспортными runtime classes; существующее использование DTO
+на application boundary допустимо по [HTTP API](backend-http-api.md).
 
-## Существующие seams
+Сохраняй существующий error contract: HTTP exceptions остаются на application/
+transport boundary. Чистому расчёту не нужен новый framework ошибок.
+Точные ограничения — [HTTP](backend-http-api.md), [Data](backend-data.md),
+[Security](security-auth.md), [Integrations](backend-integrations.md).
 
-`TbankConnectionModule` уже объединяет счета, портфель, операции, доходы и события.
-Новый связанный use case обычно добавляется в него; создание отдельного module
-требует собственной ответственности, не только нового файла.
+## Сценарии и размер сервисов
 
-- [BrokerageOperationsController](../../src/tbank/brokerage-operations.controller.ts) передаёт user/account/query в service, без финансовых вычислений в controller.
-- [TbankAccessService](../../src/tbank/tbank-access.service.ts) владеет connection/account access и generation; новые account use cases используют его вместо копирования guard/decrypt logic.
-- [decimal.ts](../../src/tbank/decimal.ts) — пример pure domain helper; Injectable и adapter для арифметики не нужны.
+Разделяй независимые операции, а не строки. `BankCardsService` отвечает за карты,
+`BankOperationsService` — журнал/переводы/возвраты, `ExpenseCategoriesService` —
+категории, `GetBankSummaryUseCase` — сводку. `BankCardsRepository` сохраняет
+общий transaction retry и owner lookup; денежные транзакции не разрываются.
+Чистые расчёты банковских карт находятся в `domain` этого модуля.
 
-Наличие guard подтверждает session, но не владение account. При пересечении
-access boundary добавь [Security](security-auth.md). Ошибка upstream не должна
-обходить общий HTTP filter или превращать чужой account в доступный.
+У инструментов `StockCatalogService` / `BondCatalogService` хранят идентичность
+листинга и общий кэш slice; market service — котировки/свечи, income service — выплаты/личные позиции.
+`GetStockCompanyUseCase` владеет сведениями об эмитенте. Ключи, TTL и pending
+promises разделяют прежний экземпляр кэша; extract не должен менять generation.
+Portfolio и operations сохраняют связную координацию снимков/страниц и кэшей.
+Расчёты портфеля находятся в `portfolio/domain`; преобразование брокерских
+позиций — в `tbank-portfolio.mapper.ts`. `bond-money.mapper.ts` преобразует
+ответ клиента и не является value object.
+
+Выбирай обычную функцию для чистого вычисления; repository contract — только
+для реальной границы. CQRS/buses/events, BaseRepository/BaseService, DI token
+для каждого класса, mapper/presenter для каждого DTO и новые dependencies
+не нужны для структурного переноса.
+
+## Common
+
+`common` содержит общий error filter, logging, API decorators, тип `Money`,
+его HTTP `MoneyDto` и точную decimal-арифметику, используемые несколькими областями. Код одного
+модуля принадлежит этому модулю: например, RUB/kopecks rules — банковским картам,
+protobuf units/nano conversion — T-Bank integration. Domain использует
+`money.types.ts`, а не Swagger DTO; это общая форма денег для карт и портфеля.
+Давай функциям предметные имена; не создавай глобальные `utils.ts`/`helpers.ts`.
+
+## Domain literals and magic values
+
+Finite business vocabulary must be modeled explicitly; incidental implementation
+literals stay inline. Это относится к error codes, statuses, operation/account/
+instrument/transaction types, permissions, roles, feature states и бизнес-режимам.
+
+Перед новым определением найди existing owner/type/value. В branching и comparisons
+используй символическое значение владельца; не повторяй raw domain literals.
+Храни словарь у domain/module/entity с соблюдением границ слоёв, без глобальной
+свалки `constants.ts`. Сохраняй принятый pattern; для нового project-owned словаря
+без подходящего аналога используй `as const` с derived union:
+
+```ts
+const BankErrorCode = {
+  InvalidDate: "BANK_INVALID_DATE",
+  ImmutableOperation: "BANK_IMMUTABLE_OPERATION",
+} as const;
+type BankErrorCode = (typeof BankErrorCode)[keyof typeof BankErrorCode];
+
+// Вместо code === "BANK_INVALID_DATE":
+if (code === BankErrorCode.InvalidDate) { /* existing handling */ }
+```
+
+Значимые numeric policies (timeout, retry, page size, threshold, coefficient)
+называй по смыслу и единицам: `REQUEST_TIMEOUT_MS`, `CACHE_TTL_SECONDS`,
+`MAX_RETRY_COUNT`, `PAGE_SIZE`. Оставляй inline UI labels в принятом месте,
+log messages, индексы, `index + 1`, `Math.max(value, 0)`, `page ?? 1`,
+`percentage * 100` и очевидные локальные детали без semantic benefit.
+При неясном owner/смысле оставь значение и укажи ограничение в review.
+
+Не мигрируй корректные existing enum/union styles массово. Не добавляй ради
+правила factories, registries, schemas, loaders, abstraction layers, dependencies,
+custom lint/AST rules, generation/validation scripts или тесты существования
+констант. Semantic review проверяет ownership, единое написание и неизменность
+wire values; обычные behavior tests проверяют поведение.
+
+OpenAPI enum metadata и runtime validation должны читать тот же vocabulary,
+что application/domain. Например, `BankOperationKind` принадлежит bank-cards/domain,
+а DTO получает допустимые значения через `Object.values(BankOperationKind)`.
+Frontend переиспользует generated OpenAPI types/values по возможностям генератора,
+а не определяет независимый backend-owned словарь. Внешние/generated enums
+сохраняй; generated Prisma/protocol code вручную не меняй.
+
+`@typescript-eslint/no-magic-numbers` включён как error; базовое ESLint rule
+отключено в пользу TS-версии. Исключения для очевидных чисел и их bigint форм,
+индексов, default values, enum/type declarations и readonly properties заданы
+в ESLint config. Test fixtures/expected values остаются inline, остальные lint
+правила продолжают действовать. Numeric policy получает предметное имя и единицы;
+semantic magic strings проверяются conventions/review без нового инструмента.
 
 ## Logging
 

.ai/conventions/backend-data.md

@@ -9,12 +9,33 @@ PrismaService — существующий shared DB provider с lifecycle пр
 
 | Ситуация | Решение |
 | --- | --- |
-| Один query/write конкретного use case | Existing service + PrismaService |
+| Данные для use case | Concrete repository; use case не импортирует PrismaService/Prisma и не строит queries |
 | Несколько записей обязаны выполниться вместе | Database transaction вокруг инварианта |
 | Конкурентная смена одного значения | Atomic conditional update/constraint с проверкой результата |
 | Независимые reads | Не добавляй transaction ради внешнего вида |
 | Общая persistence abstraction | Только при реальной общей ответственности; generic repository для одной Prisma реализации не нужен |
 
+Размещение repository определяется [Architecture](backend-architecture.md):
+в слоистом module это `infrastructure/`.
+Repository — конкретный класс `*.repository.ts` у business owner, без обязательных
+interface/port/adapter. Он владеет queries, includes/filtering, DB mapping и
+согласованным чтением. Суффиксы `*.persistence.ts`, `*.store.ts`, `*.dao.ts`
+для той же роли не используем. Nest module регистрирует repository приватно.
+
+`BankCardsRepository.summaryData` проверяет владельца карты и получает операции
+с категориями в одной read transaction. `GetBankSummaryUseCase` выбирает период,
+вызывает repository, затем чистый `bankSummary` и формирует ответ. Prisma records
+не становятся domain entities: расчёт получает только нужные ему значения.
+
+Не создавай обёртку на каждый вызов Prisma. Существующие связные CRUD/transaction
+services (auth, lifecycle подключения, изменения карт/операций/категорий)
+сохраняют queries рядом с CAS и проверками инварианта, если их перенос требует
+лишь набора pass-through методов. Новая самостоятельная read/write capability
+получает repository method; самостоятельный use case не выполняет Prisma queries.
+`BankCardsRepository.write` сохраняет общую retry/transaction boundary для
+существующих banking services. Такой callback с Prisma transaction client —
+локальная техническая граница этих services, не API для domain или use cases.
+
 Выбирай только нужные данные, сохраняй user/account ownership в запросах и
 application checks. Предварительный lookup не заменяет unique constraint при race.
 Пример: AuthService обрабатывает P2002 и использует conditional `updateMany`

.ai/conventions/backend-http-api.md

@@ -16,16 +16,23 @@ use case. Для route/request/response/status/error shape читай
 | HTTP envelope/безопасная ошибка | Общий HttpExceptionFilter |
 
 Controller объявляет contract и делегирует; не обращается напрямую к Prisma/gRPC
-ради обхода service. Request identity берётся из verified `request.user`, не из
-body/userId, предоставленного клиентом. Access rules активируют Security.
+и не выполняет финансовые расчёты или сложную оркестрацию.
+Controller вызывает application use case/service. Identity берётся из verified
+`request.user`, не из body/userId, предоставленного клиентом. Access rules активируют Security.
 
 ## DTO и errors
 
 DTO — runtime class: TS interface не предоставляет validation metadata.
+`*.controller.ts` и `*.dto.ts` остаются около HTTP boundary, в root компактного
+module или presentation. DTO можно передать application boundary при совпадении
+формы; отдельный Input с теми же полями не нужен. Domain не импортирует DTO:
+например, чистые денежные расчёты используют `Money`, а Swagger — `MoneyDto`.
+Нормализованная форма input нужна только при смысловом отличии от wire contract;
+выбор suffix принадлежит [Architecture](backend-architecture.md).
 ValidationPipe уже настроен в `configureApp` (`transform`, `whitelist`).
 Не обещай rejection неизвестных fields: `forbidNonWhitelisted` не включён.
 Для query numbers/arrays выбирай явное преобразование и валидаторы, как в
-[operations DTO](../../src/tbank/brokerage-operation.dto.ts). Swagger metadata
+[operations DTO](../../src/modules/investments/operations/presentation/brokerage-operation.dto.ts). Swagger metadata
 описывает те же required/optional/nullable/enum/range значения.
 
 Используй типизированные response DTO, `ApiOkResponse`/другой фактический status
@@ -40,7 +47,7 @@ raw upstream error, Prisma record с secrets или stack. Текущая фор
 
 ## Пример и проверка
 
-[Operations controller](../../src/tbank/brokerage-operations.controller.ts)
+[Operations controller](../../src/modules/investments/operations/presentation/brokerage-operations.controller.ts)
 показывает guard, user.sub, DTO query и service delegation.
 Для нового field обновляй canonical source и generated artifacts в определённом
 направлении; body type frontend не исправляется вручную.

.ai/conventions/backend-integrations.md

@@ -3,14 +3,34 @@
 ## Выбор boundary
 
 T-Bank gRPC принадлежит TbankClient; MOEX metadata — MoexClient. Сервисы use case
-получают нормализованный результат через эти clients. Frontend не вызывает
+используют объявленные клиентом records; SDK clients, metadata и transport errors
+остаются внутри integration. Frontend не вызывает
 T-Bank и не получает credentials/proto client. Reference source —
 [ADR 003](../../../docs/adr/003-tbank-server-side-grpc-boundary.md) и
 [connection behavior](../../../docs/integrations/tbank.md).
 
+`modules/investments/tbank-connection` — пользовательская capability чтения,
+создания/замены и удаления подключения. `integrations/tbank` — технические
+RPC, credentials/access и resilience. Эти владельцы не объединяются из-за имени
+поставщика; низкоуровневый client не зависит от пользовательского module.
+
+`*.client.ts` содержит transport и его retries; `*.api.ts` только перечисляет
+публичные exports. Все шесть `auth/operations/portfolio/tbank/moex/ncr.api.ts`
+имеют одинаковую роль программной границы, определённую в
+[Architecture](backend-architecture.md). Логика, DTO definitions и HTTP routes
+в эти файлы не помещаются. Type exports обозначаются `export type`.
+
+Преобразование provider records происходит на boundary: например,
+`tbank-portfolio.mapper.ts` и `bond-money.mapper.ts`; protobuf decimal helper
+остаётся отдельным чистым входом integration. Domain получает внутренние
+значения и не импортирует gRPC/SDK types. Не добавляй новый adapter на каждый
+client или mapper для простого копирования полей. Даты/units/nano разбираются
+на границе клиента/его mapping, а не становятся моделью чистых расчётов.
+
 Для нового account use case сначала используй TbankAccessService: access,
 connection generation и invalid-token translation не дублируются в callers.
-Чистый mapper финансового значения остаётся рядом с domain owner.
+Mapper внешних финансовых значений остаётся внутри business capability,
+обычно в infrastructure по [Architecture](backend-architecture.md).
 
 ## Retry, cache и protocol
 
@@ -30,7 +50,7 @@ cache/stale policy; semantics конкретного use case читай чер
 raw gRPC exception не уходит клиенту. Existing translation — в TbankTokenService
 и общем HTTP boundary. Для HTTP error change читай HTTP API/Security по trigger.
 
-Vendor proto хранится в `src/tbank/proto/contracts`; для обновления сверяй
+Vendor proto хранится в `src/integrations/tbank/proto/contracts`; для обновления сверяй
 официальный source и влияние на loader/DTO, не редактируй read-only references.
 Generated artifacts, если есть, создавай из source, без ручной подгонки вывода.
 
@@ -40,7 +60,7 @@ Generated artifacts, если есть, создавай из source, без р
 ответственного service. Отдельный abstraction/adapter оправдан новой
 ответственностью или несовместимым protocol, не только вторым методом.
 
-[TbankClient tests](../../src/tbank/tbank.client.spec.ts) — пример controlled
+[TbankClient tests](../../src/integrations/tbank/tbank.client.spec.ts) — пример controlled
 upstream responses. Проверь queue/deadline/retry limit, token translation,
 cache isolation и late response для затронутых ветвей. Fixtures синтетические;
 реальная сеть, секреты и пользовательские accounts не нужны.

.ai/conventions/backend-testing.md

@@ -21,8 +21,8 @@ Unit specs colocated в `src/**/*.spec.ts`; HTTP/integration — `test/`.
 
 ## Случаи и примеры
 
-- [BrokerageAccountsService tests](../../src/tbank/brokerage-accounts.service.spec.ts): отсутствие connection не вызывает upstream, нормализация и точные суммы.
-- [AuthService tests](../../src/auth/auth.service.spec.ts): invalid/expired/superseded token и concurrent rotation; mock race test не является доказательством DB transaction.
+- [BrokerageAccountsService tests](../../src/modules/investments/brokerage-accounts/brokerage-accounts.service.spec.ts): отсутствие connection не вызывает upstream, нормализация и точные суммы.
+- [AuthService tests](../../src/modules/auth/application/auth.service.spec.ts): invalid/expired/superseded token и concurrent rotation; mock race test не является доказательством DB transaction.
 - [HTTP filter tests](../../src/common/filters/http-exception.filter.spec.ts): безопасный error envelope.
 - [OpenAPI integration](../../test/openapi-contract.e2e-spec.ts): configured app + frontend snapshot, без записи snapshot и без T-Bank.
 
@@ -36,11 +36,15 @@ Unit specs colocated в `src/**/*.spec.ts`; HTTP/integration — `test/`.
 Полный `npm run verify` включает lint, оба typecheck, Jest и build.
 `npm run test:openapi-contract` — отдельный required check при wire contract change.
 
-`npm run test:e2e` существует, но известный Prisma migration blocker описан в
-[ограничении сквозной проверки](../../../docs/development/verification.md#известное-ограничение-сквозной-проверки) и WL-P2-05
-[registry](../../../docs/development/audit-remediation.md). Скрипт использует
-фиксированную `/tmp/wealth-ledger-e2e.db`; не запускай его конкурентно как
-независимые DB tests. Для isolation выбери отдельную test DB и runner configuration.
-Если задаче нужна HTTP/DB proof, установи применимость blocker и выполни доступную
-изолированную проверку. Не объявляй покрытым то, что до tests не запустилось;
-сохрани точный failure и оставшуюся проверку. Unit/Swagger success не заменяет e2e.
+`npm run test:e2e` запускает все HTTP suites через изолированный SQLite runner;
+`npm run test:sqlite` — только auth/cards. Каждая suite получает новую временную
+базу со штатными migrations. Прямой Jest без runner отклоняется до DB-запросов.
+`prisma.config.ts` исключает влияние унаследованного `RUST_LOG=warn/error`,
+вызывающего ошибку fresh migration на Prisma 7.9.1. Подробности и регрессия запуска —
+[Backend README](../../README.md#реальная-sqlite-и-сохранность-данных).
+HTTP suites требуют разрешения открывать локальные порты. Ошибка sandbox
+не считается успешным тестом; повторите проверку в подходящем окружении.
+
+Для schema/data changes дополнительно `npm run test:durability -- <baseline>`.
+Матрица рисков и подготовка совместимой предыдущей сборки — в том же README.
+Mock Prisma не заменяет доказательство реальной DB concurrency.

.ai/conventions/security-auth.md

@@ -14,7 +14,7 @@ TbankTokenService/TbankCrypto. Расширяй существующую boundar
 [ADR 006](../../../docs/adr/006-auth-session-policy.md)/[009](../../../docs/adr/009-concurrent-refresh-rotation-policy.md)
 задают session semantics. Access хранится только в памяти frontend; refresh
 передаётся httpOnly cookie. Source code конфигурации cookie —
-[AuthController](../../src/auth/auth.controller.ts); изменение flags/path требует
+[AuthController](../../src/modules/auth/presentation/auth.controller.ts); изменение flags/path требует
 проверки browser/HTTP поведения, не только TypeScript.
 
 Refresh rotation атомарна: один победитель, проигравший/superseded token получает

.nvmrc

@@ -1 +1 @@
-22
+24.21.0

AGENTS.md

@@ -14,7 +14,7 @@ zero-warning ESLint, application/test TypeScript, Jest и build.
 
 HTTP contract changes дополнительно проходят общий
 [contract workflow](../docs/development/runtime-openapi-verification.md).
-Общий e2e имеет известный environment blocker; применимость и маршрут проверки
+Общий e2e запускается на отдельных временных DB; применимость и маршрут проверки
 описаны в [backend testing](.ai/conventions/backend-testing.md).
 Generated Prisma client не редактируется вручную. Credentials, авторизация
 доступа к счетам и внешние интеграции остаются server-side.

README.md

@@ -5,13 +5,14 @@ NestJS API WealthLedger. Backend владеет auth, SQLite-данными и s
 
 ## Быстрый старт
 
-Требуется Node 22 (`.nvmrc`). Создайте `.env` из примера, замените placeholder
+Требуется Node 24 (`.nvmrc`). Создайте `.env` из примера, замените placeholder
 секреты и установите зависимости строго из lockfile:
 
 ```bash
 cp .env.example .env
 nvm use --silent
 npm ci
+npx prisma migrate deploy
 npm run start:dev
 ```
 
@@ -31,9 +32,19 @@ npm run verify
 Он запускает zero-warning lint,
 application/test typechecks, Jest и build. `npm run lint:fix` — отдельная
 записывающая команда, `npm run test:cov` — диагностика без общего числового
-threshold. `npm run test:e2e` пока не является passing gate: Prisma schema
-engine останавливает migration до запуска Jest. Точный статус и trigger
-пересмотра находятся в [remediation registry](../docs/development/audit-remediation.md).
+threshold. `npm run test:e2e` отдельно проверяет все HTTP suites на новых базах
+и runtime OpenAPI с соседним frontend checkout. Для полной backend-проверки
+выполните обе команды. Результаты — в
+[remediation registry](../docs/development/audit-remediation.md).
+
+Общий `tsconfig.json` включает `strict: true` и `noFallthroughCasesInSwitch`
+для приложения, тестов и сборок. ESLint запрещает non-null assertions
+(`value!`) и definite-assignment assertions (`field!: Type`).
+Поля DTO, заполняемые вне конструктора, описываются через `declare`:
+входные значения заполняет и проверяет Nest, ответные DTO описывают форму
+возвращаемых объектов. `declare` не создаёт значение и не заменяет
+runtime-валидацию. В обычном коде нужны инициализация или сужение типа
+после проверки значения.
 
 ## Документация
 
@@ -59,3 +70,66 @@ npm run test:openapi-contract
 Разработка идёт напрямую по задаче пользователя. Каждый affected repo проходит
 свой verify; при изменении wire contract дополнительно выполняется contract check.
 Обязательного OpenSpec/SDD lifecycle нет.
+
+## Реальная SQLite и сохранность данных
+
+После `nvm use --silent` запускайте `npm run test:sqlite` при изменении auth,
+карточных операций или DB boundary, `npm run test:e2e` — для всех HTTP suites.
+Обе команды используют один runner: отдельный каталог `wealthledger-e2e-*`
+в системном temp на каждую suite, один `DATABASE_URL` для migrations и Jest.
+Внешний `DATABASE_URL` заменяется временным; `.env` и пользовательские данные
+не изменяются. Прямой Jest без runner отклоняется до обращения к базе.
+При ошибке migration/Jest или SIGINT/SIGTERM runner останавливает дочерние
+процессы, удаляет свой каталог и возвращает ненулевой exit code.
+Нужен доступ к локальным HTTP-портам; sandbox может его запрещать.
+
+`prisma.config.ts` удаляет унаследованный `RUST_LOG` только в процессе Prisma CLI:
+на Prisma 7.9.1 уровни `warn`/`error` вызывают пустой `Schema engine error`
+при fresh migration, без переменной миграция проходит. Постоянный
+`RUST_LOG=info` и обновление зависимостей не нужны. Logging приложения
+настраивается отдельно. История migrations применяется штатным `migrate deploy`.
+
+Регрессия самого запуска: `node test/sqlite-regression.cjs`. Она выполняет
+три последовательных и два параллельных полных e2e, проверяет уникальность DB,
+сохранность вымышленного внешнего файла, отказ migration и SIGINT/SIGTERM cleanup.
+Логи остаются в каталоге из вывода. Для одной suite:
+`node test/sqlite.cjs app.e2e-spec.ts`.
+
+| Риск | Проверка реальной DB |
+| --- | --- |
+| Чужой пользователь | `bank-cards.e2e-spec.ts`: owner каждой карты, категории, покупки и стороны перевода |
+| Повтор и конкурентный update | Те же tests: fingerprint, tombstone, версии, один refund в пределах покупки, archive/write |
+| Конкурентный refresh | `app.e2e-spec.ts`: оба запроса читают прежний hash до CAS; один 200, один 401, cookie победителя работает после replay |
+| Rollback и деньги | Карточные tests: откат source lock, атомарный перевод, точные суммы выше 2^53 и границы signed64 |
+| Migration, restart, backup/restore | `test:durability`: прежнее приложение, новая schema, история, откат приложения и восстановление backup |
+
+Prisma в этих suites не заменяется mocks. В refresh тесте барьер задерживает
+настоящую подпись JWT, чтобы оба запроса дошли до реальной конкурентной записи.
+Unit tests с mocks отдельно проверяют orchestration и не доказывают DB concurrency.
+
+При изменении schema/migrations или сохранения данных дополнительно выполните
+`npm run test:durability -- /absolute/path/to/baseline`. Он не входит в lint/verify.
+Baseline — отдельная сборка до проверяемых миграций с неизменённым префиксом
+migration history. Для текущей карточной схемы подходит revision
+`8ec172f48eefa2237dc0c16919fbb2e726b39a65` (до добавления карт):
+
+```bash
+# Из backend; экспорт не содержит .env или локальную базу.
+baseline_dir=$(mktemp -d /tmp/wealthledger-baseline-XXXXXX)
+git archive 8ec172f48eefa2237dc0c16919fbb2e726b39a65 | tar -x -C "$baseline_dir"
+(
+  cd "$baseline_dir"
+  nvm use --silent
+  npm ci
+  npm run build
+)
+nvm use --silent
+npm run build
+npm run test:durability -- "$baseline_dir"
+```
+
+Не подменяйте baseline текущей сборкой: runner отвергает тот же путь,
+отсутствующую сборку и неподходящую migration history. Для следующей schema
+выберите совместимую предыдущую revision и проверьте её API-сценарии runner.
+Durability оставляет временные DB, логи и `result.json` по пути из вывода для
+диагностики; он не откатывает schema пользовательской базы.

eslint.config.mjs

@@ -26,10 +26,61 @@ export default tseslint.config(
   },
   {
     rules: {
+      'no-magic-numbers': 'off',
+      '@typescript-eslint/no-magic-numbers': [
+        'error',
+        {
+          ignore: [
+            -60,
+            -24,
+            -10,
+            -2,
+            -1,
+            0,
+            1,
+            2,
+            10,
+            24,
+            60,
+            '-60n',
+            '-24n',
+            '-10n',
+            '-2n',
+            '-1n',
+            '0n',
+            '1n',
+            '2n',
+            '10n',
+            '24n',
+            '60n',
+          ],
+          ignoreArrayIndexes: true,
+          ignoreDefaultValues: true,
+          ignoreEnums: true,
+          ignoreNumericLiteralTypes: true,
+          ignoreReadonlyClassProperties: true,
+          ignoreTypeIndexes: true,
+          enforceConst: true,
+        },
+      ],
       '@typescript-eslint/no-explicit-any': 'off',
+      '@typescript-eslint/no-non-null-assertion': 'error',
+      'no-restricted-syntax': [
+        'error',
+        {
+          selector:
+            'PropertyDefinition[definite=true], VariableDeclarator[definite=true]',
+          message:
+            'Definite assignment assertions are forbidden. Initialize owned values; use declare only for externally populated DTO fields.',
+        },
+      ],
       '@typescript-eslint/no-floating-promises': 'warn',
       '@typescript-eslint/no-unsafe-argument': 'warn',
-      "prettier/prettier": ["error", { endOfLine: "auto" }],
+      'prettier/prettier': ['error', { endOfLine: 'auto' }],
     },
   },
+  {
+    files: ['**/*.spec.ts', 'test/**/*.ts'],
+    rules: { '@typescript-eslint/no-magic-numbers': 'off' },
+  },
 );

nest-cli.json

@@ -5,7 +5,7 @@
   "compilerOptions": {
     "deleteOutDir": true,
     "assets": [
-      { "include": "tbank/proto/contracts/**/*.proto", "watchAssets": true }
+      { "include": "integrations/tbank/proto/contracts/**/*.proto", "watchAssets": true }
     ]
   }
 }

package-lock.json

@@ -44,7 +44,7 @@
         "@types/cookie-parser": "^1.4.10",
         "@types/express": "^5.0.0",
         "@types/jest": "^30.0.0",
-        "@types/node": "^22.10.7",
+        "@types/node": "^24.13.3",
         "@types/passport-jwt": "^4.0.1",
         "@types/supertest": "^6.0.2",
         "eslint": "^9.18.0",
@@ -64,7 +64,7 @@
         "typescript-eslint": "^8.20.0"
       },
       "engines": {
-        "node": "22.x"
+        "node": "24.x"
       }
     },
     "node_modules/@angular-devkit/core": {
@@ -812,6 +812,40 @@
         "@electric-sql/pglite": "0.4.3"
       }
     },
+    "node_modules/@emnapi/core": {
+      "version": "1.10.0",
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+      "resolved": "https://registry.npmjs.org/@emnapi/wasi-threads/-/wasi-threads-1.2.1.tgz",
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+      },
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+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/Brooooooklyn"
+      },
+      "peerDependencies": {
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+        "@emnapi/runtime": "^1.7.1 || ^2.0.0-alpha.4"
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@@ -3251,6 +3307,17 @@
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@@ -3577,12 +3644,12 @@
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       "dependencies": {
-        "undici-types": "~6.21.0"
+        "undici-types": "~7.18.0"
       }
     },
     "node_modules/@types/passport": {
@@ -4005,6 +4072,34 @@
       "dev": true,
       "license": "ISC"
     },
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+      "version": "1.12.2",
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+        "arm"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "android"
+      ]
+    },
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+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
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+      ]
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       "version": "1.12.2",
       "resolved": "https://registry.npmjs.org/@unrs/resolver-binding-darwin-arm64/-/resolver-binding-darwin-arm64-1.12.2.tgz",
@@ -4019,6 +4114,307 @@
         "darwin"
       ]
     },
+    "node_modules/@unrs/resolver-binding-darwin-x64": {
+      "version": "1.12.2",
+      "resolved": "https://registry.npmjs.org/@unrs/resolver-binding-darwin-x64/-/resolver-binding-darwin-x64-1.12.2.tgz",
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+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "darwin"
+      ]
+    },
+    "node_modules/@unrs/resolver-binding-freebsd-x64": {
+      "version": "1.12.2",
+      "resolved": "https://registry.npmjs.org/@unrs/resolver-binding-freebsd-x64/-/resolver-binding-freebsd-x64-1.12.2.tgz",
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+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "freebsd"
+      ]
+    },
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+      "version": "1.12.2",
+      "resolved": "https://registry.npmjs.org/@unrs/resolver-binding-linux-arm-gnueabihf/-/resolver-binding-linux-arm-gnueabihf-1.12.2.tgz",
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+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ]
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+      "license": "MIT",
+      "optional": true,
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+      ]
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+      "optional": true,
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+    "node_modules/@unrs/resolver-binding-openharmony-arm64": {
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+      "resolved": "https://registry.npmjs.org/@unrs/resolver-binding-openharmony-arm64/-/resolver-binding-openharmony-arm64-1.12.2.tgz",
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+      "optional": true,
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+      "resolved": "https://registry.npmjs.org/@unrs/resolver-binding-wasm32-wasi/-/resolver-binding-wasm32-wasi-1.12.2.tgz",
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+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
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+        "@emnapi/runtime": "1.10.0",
+        "@napi-rs/wasm-runtime": "^1.1.4"
+      },
+      "engines": {
+        "node": ">=14.0.0"
+      }
+    },
+    "node_modules/@unrs/resolver-binding-win32-arm64-msvc": {
+      "version": "1.12.2",
+      "resolved": "https://registry.npmjs.org/@unrs/resolver-binding-win32-arm64-msvc/-/resolver-binding-win32-arm64-msvc-1.12.2.tgz",
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+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "win32"
+      ]
+    },
+    "node_modules/@unrs/resolver-binding-win32-ia32-msvc": {
+      "version": "1.12.2",
+      "resolved": "https://registry.npmjs.org/@unrs/resolver-binding-win32-ia32-msvc/-/resolver-binding-win32-ia32-msvc-1.12.2.tgz",
+      "integrity": "sha512-WD9sY00OfpHVGfsnHZoA8jVT+esS/Bg8z8jzxp5BnDCjjwsuKsPQrzswwpFy4J1AUJbXPRfkpcX0mXrzeXW79g==",
+      "cpu": [
+        "ia32"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "win32"
+      ]
+    },
+    "node_modules/@unrs/resolver-binding-win32-x64-msvc": {
+      "version": "1.12.2",
+      "resolved": "https://registry.npmjs.org/@unrs/resolver-binding-win32-x64-msvc/-/resolver-binding-win32-x64-msvc-1.12.2.tgz",
+      "integrity": "sha512-nAB74NfSNKknqQ1RrYj6uz8FcXEomu/MATJZxh/x+BArzN2U3JbOYC0APYzUIGhVY3m5hRxA8VPNdPBoG8txlA==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "win32"
+      ]
+    },
     "node_modules/@visx/curve": {
       "version": "4.0.1-alpha.0",
       "resolved": "https://registry.npmjs.org/@visx/curve/-/curve-4.0.1-alpha.0.tgz",
@@ -12059,9 +12455,9 @@
       }
     },
     "node_modules/undici-types": {
-      "version": "6.21.0",
-      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.21.0.tgz",
-      "integrity": "sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==",
+      "version": "7.18.2",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.18.2.tgz",
+      "integrity": "sha512-AsuCzffGHJybSaRrmr5eHr81mwJU3kjw6M+uprWvCXiNeN9SOGwQ3Jn8jb8m3Z6izVgknn1R0FTCEAP2QrLY/w==",
       "license": "MIT"
     },
     "node_modules/universalify": {

package.json

@@ -6,7 +6,7 @@
   "private": true,
   "license": "UNLICENSED",
   "engines": {
-    "node": "22.x"
+    "node": "24.x"
   },
   "scripts": {
     "build": "prisma generate && nest build",
@@ -24,8 +24,10 @@
     "test:watch": "jest --watch",
     "test:cov": "jest --coverage",
     "test:debug": "node --inspect-brk -r tsconfig-paths/register -r ts-node/register node_modules/.bin/jest --runInBand",
-    "test:e2e": "DATABASE_URL=file:/tmp/wealth-ledger-e2e.db prisma migrate deploy && NODE_ENV=development NODE_OPTIONS=--experimental-vm-modules jest --config ./test/jest-e2e.json",
-    "test:openapi-contract": "NODE_OPTIONS=--experimental-vm-modules jest --config ./test/jest-e2e.json --runInBand openapi-contract.e2e-spec.ts",
+    "test:e2e": "node test/sqlite.cjs --all",
+    "test:sqlite": "node test/sqlite.cjs",
+    "test:durability": "node test/bank-cards-durability.cjs",
+    "test:openapi-contract": "node test/sqlite.cjs openapi-contract.e2e-spec.ts",
     "verify": "npm run lint && npm run typecheck:app && npm run typecheck:test && npm test -- --runInBand && npm run build"
   },
   "dependencies": {
@@ -64,7 +66,7 @@
     "@types/cookie-parser": "^1.4.10",
     "@types/express": "^5.0.0",
     "@types/jest": "^30.0.0",
-    "@types/node": "^22.10.7",
+    "@types/node": "^24.13.3",
     "@types/passport-jwt": "^4.0.1",
     "@types/supertest": "^6.0.2",
     "eslint": "^9.18.0",
@@ -104,5 +106,14 @@
     ],
     "coverageDirectory": "../coverage",
     "testEnvironment": "node"
+  },
+  "allowScripts": {
+    "@prisma/engines@7.9.1": true,
+    "prisma@7.9.1": true,
+    "bcrypt@6.0.0": true,
+    "better-sqlite3@12.11.1": true,
+    "fsevents@2.3.3": true,
+    "protobufjs@7.6.5": true,
+    "unrs-resolver@1.12.2": true
   }
 }

prisma.config.ts

@@ -1,6 +1,10 @@
 import 'dotenv/config';
 import { defineConfig } from 'prisma/config';
 
+// Prisma 7.9.1 fresh SQLite migration fails with inherited RUST_LOG=warn/error.
+// Use the engine default; application logging is configured separately.
+delete process.env.RUST_LOG;
+
 export default defineConfig({
   schema: 'prisma/schema.prisma',
   datasource: {

src/app.module.ts

@@ -1,13 +1,19 @@
 import { Module } from '@nestjs/common';
 import { ConfigModule, ConfigService } from '@nestjs/config';
-import { randomUUID } from 'node:crypto';
 import { LoggerModule } from 'nestjs-pino';
-import { BankCardsModule } from './bank-cards/bank-cards.module';
-import { AuthModule } from './auth/auth.module';
+import { randomUUID } from 'node:crypto';
 import { LoggingModule } from './common/logging/logging.module';
 import { Environment, validateEnv } from './config/env.validation';
+import { AuthModule } from './modules/auth/auth.module';
+import { BankCardsModule } from './modules/banking/bank-cards/bank-cards.module';
+import { BrokerageAccountsModule } from './modules/investments/brokerage-accounts/brokerage-accounts.module';
+import { IncomeModule } from './modules/investments/income/income.module';
+import { InstrumentsModule } from './modules/investments/instruments/instruments.module';
+import { OperationsModule } from './modules/investments/operations/operations.module';
+import { PortfolioModule } from './modules/investments/portfolio/portfolio.module';
+import { TbankConnectionModule } from './modules/investments/tbank-connection/tbank-connection.module';
+import { UpcomingEventsModule } from './modules/investments/upcoming-events/upcoming-events.module';
 import { PrismaModule } from './prisma/prisma.module';
-import { TbankConnectionModule } from './tbank/tbank-connection.module';
 
 @Module({
   imports: [
@@ -51,6 +57,12 @@ import { TbankConnectionModule } from './tbank/tbank-connection.module';
     PrismaModule,
     AuthModule,
     BankCardsModule,
+    BrokerageAccountsModule,
+    PortfolioModule,
+    OperationsModule,
+    IncomeModule,
+    UpcomingEventsModule,
+    InstrumentsModule,
     TbankConnectionModule,
   ],
 })

src/bank-cards/bank-cards.module.ts

@@ -1,5 +0,0 @@
-import { Module } from '@nestjs/common';
-import { BankCardsController } from './bank-cards.controller';
-import { BankCardsService } from './bank-cards.service';
-@Module({ controllers: [BankCardsController], providers: [BankCardsService] })
-export class BankCardsModule {}

src/bank-cards/bank-cards.service.ts

@@ -1,708 +0,0 @@
-import {
-  BadRequestException,
-  ConflictException,
-  GoneException,
-  Injectable,
-  NotFoundException,
-} from '@nestjs/common';
-import { createHash, randomUUID } from 'node:crypto';
-import {
-  Prisma,
-  BankCard,
-  BankCardOperation,
-} from '../../generated/prisma/client';
-import { PrismaService } from '../prisma/prisma.service';
-import { parseRubMoney, rubMoney } from '../common/rub-money';
-import {
-  bankBalance,
-  bankSummary,
-  isCalendarDate,
-  moscowToday,
-} from './bank-card.calculations';
-import {
-  bankPaymentSystems,
-  BankCardDto,
-  BankOperationDto,
-  BankOperationsQueryDto,
-  BankPageQueryDto,
-  BankPeriodQueryDto,
-  BankSummaryQueryDto,
-  CreateBankCardDto,
-  CreateBankOperationDto,
-  UpdateBankCardDto,
-  UpdateBankOperationDto,
-} from './bank-card.dto';
-
-type Tx = Prisma.TransactionClient;
-const seeds = [
-  'Продукты',
-  'Кафе',
-  'Такси',
-  'Транспорт',
-  'Жильё',
-  'Здоровье',
-  'Покупки',
-  'Развлечения',
-  'Другое',
-];
-const fail = (code = 'BANK_INVALID_INPUT'): never => {
-  throw new BadRequestException({ code });
-};
-function periodBounds(query: BankPeriodQueryDto) {
-  if (query.month && !query.from && !query.to) {
-    const from = `${query.month}-01`;
-    if (!isCalendarDate(from)) return fail();
-    const end = new Date(`${from}T00:00:00Z`);
-    end.setUTCMonth(end.getUTCMonth() + 1, 0);
-    return { from, to: end.toISOString().slice(0, 10) };
-  }
-  if (
-    query.month ||
-    !query.from ||
-    !query.to ||
-    !isCalendarDate(query.from) ||
-    !isCalendarDate(query.to) ||
-    query.from > query.to
-  )
-    return fail();
-  return { from: query.from, to: query.to };
-}
-const conflict = (code = 'BANK_VERSION_CONFLICT'): never => {
-  throw new ConflictException({ code });
-};
-const missing = (): never => {
-  throw new NotFoundException({ code: 'BANK_NOT_FOUND' });
-};
-const fingerprint = (value: unknown) =>
-  createHash('sha256')
-    .update(
-      JSON.stringify(value, (_key, item: unknown) =>
-        typeof item === 'bigint' ? item.toString() : item,
-      ),
-    )
-    .digest('hex');
-function amount(value: Parameters<typeof parseRubMoney>[0], positive = false) {
-  try {
-    return parseRubMoney(value, positive);
-  } catch {
-    return fail('BANK_INVALID_MONEY');
-  }
-}
-function calendar(value: string) {
-  if (!isCalendarDate(value)) fail('BANK_INVALID_DATE');
-  return value;
-}
-function currentDate(value: string) {
-  calendar(value);
-  if (value > moscowToday()) fail('BANK_INVALID_DATE');
-}
-function name(value: string, max: number) {
-  if (typeof value !== 'string' || !value.trim() || value.trim().length > max)
-    fail();
-  return value.trim();
-}
-function cardInput(dto: CreateBankCardDto) {
-  const bankName = dto.bankName?.trim() || null;
-  if (bankName && bankName.length > 100) fail();
-  if (dto.lastFour != null && !/^\d{4}$/.test(dto.lastFour)) fail();
-  if (
-    dto.paymentSystem != null &&
-    !bankPaymentSystems.some((system) => system === dto.paymentSystem)
-  )
-    fail();
-  return {
-    ...(dto.paymentSystem == null ? {} : { paymentSystem: dto.paymentSystem }),
-    name: name(dto.name, 100),
-    bankName,
-    lastFour: dto.lastFour || null,
-    openingBalanceKopecks: amount(dto.openingBalance),
-    openingDate: calendar(dto.openingDate),
-  };
-}
-function operationInput(dto: CreateBankOperationDto) {
-  if (
-    dto.description != null &&
-    (typeof dto.description !== 'string' || dto.description.length > 500)
-  )
-    fail();
-  return {
-    kind: dto.kind,
-    cardId: dto.cardId,
-    targetCardId: dto.targetCardId ?? null,
-    categoryId: dto.categoryId ?? null,
-    originalExpenseId: dto.originalExpenseId ?? null,
-    amountKopecks: amount(dto.amount, true),
-    date: calendar(dto.date),
-    description: dto.description || null,
-  };
-}
-
-@Injectable()
-export class BankCardsService {
-  constructor(private readonly prisma: PrismaService) {}
-  private async write<T>(run: (tx: Tx) => Promise<T>): Promise<T> {
-    for (let attempt = 0; ; attempt++) {
-      try {
-        return await this.prisma.$transaction(run, {
-          maxWait: 10000,
-          timeout: 15000,
-        });
-      } catch (error) {
-        const code =
-          error instanceof Prisma.PrismaClientKnownRequestError
-            ? error.code
-            : '';
-        const busy =
-          code === 'P2034' ||
-          code === 'P2028' ||
-          (error instanceof Error &&
-            /SQLITE_BUSY|database is locked/.test(error.message));
-        if ((busy || code === 'P2002') && attempt < 2) continue;
-        if (busy) conflict('BANK_WRITE_CONFLICT');
-        if (code === 'P2002') conflict('BANK_DUPLICATE_CATEGORY');
-        throw error;
-      }
-    }
-  }
-  private async card(tx: Tx, userId: string, id: string, active = false) {
-    const card = await tx.bankCard.findFirst({ where: { id, userId } });
-    if (!card) return missing();
-    if (active && card.archivedAt) conflict('BANK_CARD_ARCHIVED');
-    return card;
-  }
-  private async operation(tx: Tx, userId: string, id: string) {
-    const row = await tx.bankCardOperation.findFirst({ where: { id, userId } });
-    if (!row) return missing();
-    return row;
-  }
-  private async seed(tx: Tx, userId: string) {
-    for (const [index, label] of seeds.entries()) {
-      const seedKey = index === 8 ? 'other' : String(index);
-      if (
-        !(await tx.expenseCategory.findUnique({
-          where: { userId_seedKey: { userId, seedKey } },
-        }))
-      )
-        await tx.expenseCategory.create({
-          data: {
-            id: randomUUID(),
-            userId,
-            seedKey,
-            name: label,
-            nameKey: label.toLocaleLowerCase('ru-RU'),
-          },
-        });
-    }
-  }
-  private async cardView(tx: Tx, card: BankCard): Promise<BankCardDto> {
-    const rows = await tx.bankCardOperation.findMany({
-      where: {
-        userId: card.userId,
-        deletedAt: null,
-        OR: [{ cardId: card.id }, { targetCardId: card.id }],
-      },
-    });
-    return {
-      id: card.id,
-      name: card.name,
-      bankName: card.bankName,
-      lastFour: card.lastFour,
-      paymentSystem: card.paymentSystem,
-      openingDate: card.openingDate,
-      openingBalance: rubMoney(card.openingBalanceKopecks),
-      balance: rubMoney(bankBalance(card.id, card.openingBalanceKopecks, rows)),
-      version: card.version,
-      archivedAt: card.archivedAt?.toISOString() ?? null,
-    };
-  }
-  private async operationView(
-    tx: Tx,
-    row: BankCardOperation,
-  ): Promise<BankOperationDto> {
-    const card = await this.card(tx, row.userId, row.cardId);
-    const target = row.targetCardId
-      ? await this.card(tx, row.userId, row.targetCardId)
-      : null;
-    const source = row.originalExpenseId
-      ? await this.operation(tx, row.userId, row.originalExpenseId)
-      : null;
-    const categoryId = source?.categoryId ?? row.categoryId;
-    const category = categoryId
-      ? await tx.expenseCategory.findFirst({
-          where: { id: categoryId, userId: row.userId },
-        })
-      : null;
-    const refunds =
-      row.kind === 'expense' || source
-        ? await tx.bankCardOperation.findMany({
-            where: {
-              userId: row.userId,
-              originalExpenseId: source?.id ?? row.id,
-              deletedAt: null,
-              ...(source ? { id: { not: row.id } } : {}),
-            },
-          })
-        : [];
-    return {
-      id: row.id,
-      kind: row.kind as BankOperationDto['kind'],
-      cardId: row.cardId,
-      cardName: card.name,
-      targetCardId: row.targetCardId,
-      targetCardName: target?.name ?? null,
-      categoryId,
-      categoryName: category?.name ?? null,
-      originalExpenseId: row.originalExpenseId,
-      amount: rubMoney(row.amountKopecks),
-      availableRefund:
-        row.kind === 'expense' || source
-          ? rubMoney(
-              (source?.amountKopecks ?? row.amountKopecks) -
-                refunds.reduce((sum, r) => sum + r.amountKopecks, 0n),
-            )
-          : null,
-      date: row.date,
-      description: row.description,
-      version: row.version,
-      createdAt: row.createdAt.toISOString(),
-    };
-  }
-  list(userId: string, includeArchived = false) {
-    return this.prisma.$transaction(async (tx) =>
-      Promise.all(
-        (
-          await tx.bankCard.findMany({
-            where: { userId, ...(includeArchived ? {} : { archivedAt: null }) },
-            orderBy: [{ createdAt: 'asc' }, { id: 'asc' }],
-          })
-        ).map((card) => this.cardView(tx, card)),
-      ),
-    );
-  }
-  get(userId: string, id: string) {
-    return this.prisma.$transaction(async (tx) =>
-      this.cardView(tx, await this.card(tx, userId, id)),
-    );
-  }
-  createCard(userId: string, dto: CreateBankCardDto) {
-    const input = cardInput(dto),
-      hash = fingerprint(input);
-    return this.write(async (tx) => {
-      const existing = await tx.bankCard.findUnique({ where: { id: dto.id } });
-      if (existing) {
-        if (existing.userId !== userId) missing();
-        if (existing.createFingerprint !== hash)
-          conflict('BANK_INTENT_CONFLICT');
-        return this.cardView(tx, existing);
-      }
-      currentDate(input.openingDate);
-      await this.seed(tx, userId);
-      return this.cardView(
-        tx,
-        await tx.bankCard.create({
-          data: { ...input, id: dto.id, userId, createFingerprint: hash },
-        }),
-      );
-    });
-  }
-  updateCard(userId: string, id: string, dto: UpdateBankCardDto) {
-    return this.write(async (tx) => {
-      const previous = await this.card(tx, userId, id);
-      if (previous.version !== dto.version) conflict();
-      const input = cardInput({
-        id,
-        name: dto.name ?? previous.name,
-        bankName:
-          dto.bankName === undefined
-            ? (previous.bankName ?? undefined)
-            : (dto.bankName ?? undefined),
-        lastFour:
-          dto.lastFour === undefined
-            ? (previous.lastFour ?? undefined)
-            : (dto.lastFour ?? undefined),
-        paymentSystem:
-          dto.paymentSystem === undefined
-            ? previous.paymentSystem
-            : dto.paymentSystem,
-        openingBalance:
-          dto.openingBalance ?? rubMoney(previous.openingBalanceKopecks),
-        openingDate: dto.openingDate ?? previous.openingDate,
-      });
-      const financial =
-        input.openingBalanceKopecks !== previous.openingBalanceKopecks ||
-        input.openingDate !== previous.openingDate;
-      if (financial && previous.archivedAt) conflict('BANK_CARD_ARCHIVED');
-      currentDate(input.openingDate);
-      if (
-        await tx.bankCardOperation.findFirst({
-          where: {
-            userId,
-            deletedAt: null,
-            date: { lt: input.openingDate },
-            OR: [{ cardId: id }, { targetCardId: id }],
-          },
-        })
-      )
-        fail('BANK_OPENING_DATE_CONFLICT');
-      const changed = await tx.bankCard.updateMany({
-        where: { id, userId, version: dto.version },
-        data: {
-          ...input,
-          paymentSystem: input.paymentSystem ?? null,
-          version: { increment: 1 },
-          ...(dto.archived === undefined
-            ? {}
-            : {
-                archivedAt: dto.archived
-                  ? (previous.archivedAt ?? new Date())
-                  : null,
-              }),
-        },
-      });
-      if (changed.count !== 1) conflict();
-      return this.cardView(tx, await this.card(tx, userId, id));
-    });
-  }
-  async categories(userId: string) {
-    return (
-      await this.prisma.expenseCategory.findMany({
-        where: { userId },
-        orderBy: [{ name: 'asc' }, { id: 'asc' }],
-      })
-    ).map(({ id, name, seedKey, version }) => ({
-      id,
-      name,
-      isDefault: seedKey === 'other',
-      version,
-    }));
-  }
-  createCategory(userId: string, value: string) {
-    const label = name(value, 80);
-    return this.write(async (tx) => {
-      await this.seed(tx, userId);
-      const row = await tx.expenseCategory.create({
-        data: {
-          id: randomUUID(),
-          userId,
-          name: label,
-          nameKey: label.toLocaleLowerCase('ru-RU'),
-        },
-      });
-      return {
-        id: row.id,
-        name: row.name,
-        isDefault: false,
-        version: row.version,
-      };
-    });
-  }
-  updateCategory(userId: string, id: string, value: string, version: number) {
-    const label = name(value, 80);
-    return this.write(async (tx) => {
-      const row = await tx.expenseCategory.findFirst({ where: { id, userId } });
-      if (!row) missing();
-      if (
-        (
-          await tx.expenseCategory.updateMany({
-            where: { id, userId, version },
-            data: {
-              name: label,
-              nameKey: label.toLocaleLowerCase('ru-RU'),
-              version: { increment: 1 },
-            },
-          })
-        ).count !== 1
-      )
-        conflict();
-      return {
-        id,
-        name: label,
-        isDefault: row!.seedKey === 'other',
-        version: version + 1,
-      };
-    });
-  }
-  private async validateOperation(
-    tx: Tx,
-    userId: string,
-    input: ReturnType<typeof operationInput>,
-    old?: BankCardOperation,
-  ) {
-    const cards = new Set(
-      [input.cardId, input.targetCardId, old?.cardId, old?.targetCardId].filter(
-        (id): id is string => Boolean(id),
-      ),
-    );
-    currentDate(input.date);
-    for (const id of cards) {
-      const card = await this.card(tx, userId, id, true);
-      if (
-        (id === input.cardId || id === input.targetCardId) &&
-        input.date < card.openingDate
-      )
-        fail('BANK_INVALID_DATE');
-    }
-    if (
-      old &&
-      (old.kind !== input.kind ||
-        old.originalExpenseId !== input.originalExpenseId)
-    )
-      fail('BANK_IMMUTABLE_OPERATION');
-    if (input.kind === 'transfer') {
-      if (
-        !input.targetCardId ||
-        input.targetCardId === input.cardId ||
-        input.categoryId ||
-        input.originalExpenseId
-      )
-        fail();
-    } else if (input.targetCardId) fail();
-    if (input.kind === 'expense') {
-      if (input.originalExpenseId) fail();
-      if (!input.categoryId) {
-        const category = await tx.expenseCategory.findUnique({
-          where: { userId_seedKey: { userId, seedKey: 'other' } },
-        });
-        if (!category) missing();
-        input.categoryId = category!.id;
-      }
-      if (
-        !(await tx.expenseCategory.findFirst({
-          where: { userId, id: input.categoryId },
-        }))
-      )
-        missing();
-    } else if (input.categoryId) fail();
-    if (input.kind !== 'refund' && input.originalExpenseId) fail();
-    if (input.kind === 'refund') {
-      if (!input.originalExpenseId) fail();
-      const source = await this.operation(tx, userId, input.originalExpenseId!);
-      if (
-        source.deletedAt ||
-        source.kind !== 'expense' ||
-        source.cardId !== input.cardId
-      )
-        fail('BANK_INVALID_REFUND');
-      if (
-        (
-          await tx.bankCardOperation.updateMany({
-            where: {
-              id: source.id,
-              userId,
-              version: source.version,
-              deletedAt: null,
-            },
-            data: { version: { increment: 1 } },
-          })
-        ).count !== 1
-      )
-        conflict();
-      const refunds = await tx.bankCardOperation.findMany({
-        where: {
-          userId,
-          originalExpenseId: source.id,
-          deletedAt: null,
-          ...(old ? { id: { not: old.id } } : {}),
-        },
-      });
-      if (input.date < source.date) fail('BANK_INVALID_DATE');
-      if (
-        refunds.reduce((sum, r) => sum + r.amountKopecks, 0n) +
-          input.amountKopecks >
-        source.amountKopecks
-      )
-        conflict('BANK_REFUND_LIMIT');
-    }
-    if (old?.kind === 'expense') {
-      const refunds = await tx.bankCardOperation.findMany({
-        where: { userId, originalExpenseId: old.id, deletedAt: null },
-      });
-      if (
-        refunds.length &&
-        (input.cardId !== old.cardId ||
-          refunds.some((row) => row.date < input.date) ||
-          refunds.reduce((sum, row) => sum + row.amountKopecks, 0n) >
-            input.amountKopecks)
-      )
-        conflict('BANK_DEPENDENT_REFUNDS');
-    }
-  }
-  createOperation(userId: string, dto: CreateBankOperationDto) {
-    const normalized = operationInput(dto),
-      hash = fingerprint(normalized);
-    return this.write(async (tx) => {
-      const existing = await tx.bankCardOperation.findUnique({
-        where: { id: dto.id },
-      });
-      if (existing) {
-        if (existing.userId !== userId) missing();
-        if (existing.createFingerprint !== hash)
-          conflict('BANK_INTENT_CONFLICT');
-        if (existing.deletedAt)
-          throw new GoneException({ code: 'BANK_OPERATION_DELETED' });
-        return this.operationView(tx, existing);
-      }
-      const input = { ...normalized };
-      await this.validateOperation(tx, userId, input);
-      return this.operationView(
-        tx,
-        await tx.bankCardOperation.create({
-          data: { ...input, id: dto.id, userId, createFingerprint: hash },
-        }),
-      );
-    });
-  }
-  getOperation(userId: string, id: string) {
-    return this.prisma.$transaction(async (tx) => {
-      const row = await this.operation(tx, userId, id);
-      if (row.deletedAt) missing();
-      return this.operationView(tx, row);
-    });
-  }
-  updateOperation(userId: string, id: string, dto: UpdateBankOperationDto) {
-    return this.write(async (tx) => {
-      const old = await this.operation(tx, userId, id);
-      if (old.deletedAt) missing();
-      if (old.version !== dto.version) conflict();
-      const input = operationInput({
-        id,
-        kind: dto.kind ?? (old.kind as CreateBankOperationDto['kind']),
-        cardId: dto.cardId ?? old.cardId,
-        targetCardId: dto.targetCardId ?? old.targetCardId ?? undefined,
-        categoryId: dto.categoryId ?? old.categoryId ?? undefined,
-        originalExpenseId:
-          dto.originalExpenseId ?? old.originalExpenseId ?? undefined,
-        amount: dto.amount ?? rubMoney(old.amountKopecks),
-        date: dto.date ?? old.date,
-        description: dto.description ?? old.description ?? undefined,
-      });
-      await this.validateOperation(tx, userId, input, old);
-      if (
-        (
-          await tx.bankCardOperation.updateMany({
-            where: { id, userId, version: dto.version, deletedAt: null },
-            data: { ...input, version: { increment: 1 } },
-          })
-        ).count !== 1
-      )
-        conflict();
-      return this.operationView(tx, await this.operation(tx, userId, id));
-    });
-  }
-  deleteOperation(userId: string, id: string, version: number) {
-    return this.write(async (tx) => {
-      const row = await this.operation(tx, userId, id);
-      if (row.deletedAt) return;
-      if (row.version !== version) conflict();
-      await this.card(tx, userId, row.cardId, true);
-      if (row.targetCardId) await this.card(tx, userId, row.targetCardId, true);
-      if (
-        row.kind === 'expense' &&
-        (await tx.bankCardOperation.findFirst({
-          where: { userId, originalExpenseId: id, deletedAt: null },
-        }))
-      )
-        conflict('BANK_DEPENDENT_REFUNDS');
-      if (row.originalExpenseId) {
-        const source = await this.operation(tx, userId, row.originalExpenseId);
-        if (
-          (
-            await tx.bankCardOperation.updateMany({
-              where: { id: source.id, userId, version: source.version },
-              data: { version: { increment: 1 } },
-            })
-          ).count !== 1
-        )
-          conflict();
-      }
-      if (
-        (
-          await tx.bankCardOperation.updateMany({
-            where: { id, userId, version, deletedAt: null },
-            data: { deletedAt: new Date(), version: { increment: 1 } },
-          })
-        ).count !== 1
-      )
-        conflict();
-    });
-  }
-  history(
-    userId: string,
-    id: string,
-    query: BankOperationsQueryDto | BankPageQueryDto,
-    expenses = false,
-  ) {
-    const period = expenses
-      ? undefined
-      : periodBounds(query as BankOperationsQueryDto);
-    return this.prisma.$transaction(async (tx) => {
-      await this.card(tx, userId, id);
-      const page = query.page ?? 1,
-        limit = query.limit ?? 50;
-      const where: Prisma.BankCardOperationWhereInput = {
-        userId,
-        deletedAt: null,
-        OR: [{ cardId: id }, { targetCardId: id }],
-        ...(expenses
-          ? { kind: 'expense' }
-          : { date: { gte: period!.from, lte: period!.to } }),
-      };
-      const total = await tx.bankCardOperation.count({ where });
-      const rows = await tx.bankCardOperation.findMany({
-        where,
-        orderBy: [{ date: 'desc' }, { createdAt: 'desc' }, { id: 'desc' }],
-        skip: (page - 1) * limit,
-        take: limit,
-      });
-      return {
-        items: await Promise.all(
-          rows.map((row) => this.operationView(tx, row)),
-        ),
-        total,
-        page,
-        hasNext: page * limit < total,
-      };
-    });
-  }
-  summary(userId: string, query: BankSummaryQueryDto) {
-    const period = periodBounds(query);
-    return this.prisma.$transaction(async (tx) => {
-      if (query.cardId) await this.card(tx, userId, query.cardId);
-      const rows = await tx.bankCardOperation.findMany({
-        where: {
-          userId,
-          deletedAt: null,
-          date: { gte: period.from, lte: period.to },
-          kind: { in: ['expense', 'refund'] },
-          ...(query.cardId ? { cardId: query.cardId } : {}),
-        },
-        include: { originalExpense: { select: { categoryId: true } } },
-      });
-      const totals = bankSummary(
-        period,
-        rows.map((row) => ({
-          ...row,
-          categoryId: row.originalExpense?.categoryId ?? row.categoryId,
-        })),
-      );
-      const categories = await tx.expenseCategory.findMany({
-        where: { userId },
-      });
-      return {
-        month: query.month,
-        ...period,
-        cardId: query.cardId ?? null,
-        expenses: rubMoney(totals.expenses),
-        refunds: rubMoney(totals.refunds),
-        net: rubMoney(totals.net),
-        categories: totals.categories.map((row) => ({
-          categoryId: row.categoryId,
-          categoryName: categories.find((c) => c.id === row.categoryId)!.name,
-          expenses: rubMoney(row.expenses),
-          refunds: rubMoney(row.refunds),
-          net: rubMoney(row.net),
-        })),
-      };
-    });
-  }
-}

src/common/decorators/api-safe-error-response.decorator.ts

@@ -1,4 +1,4 @@
-import { applyDecorators } from '@nestjs/common';
+import { HttpStatus, applyDecorators } from '@nestjs/common';
 import {
   ApiExtraModels,
   ApiProperty,
@@ -8,10 +8,10 @@ import {
 
 export class ProblemDetailsDto {
   @ApiProperty({ example: 401 })
-  status: number;
+  declare status: number;
 
   @ApiProperty({ example: 'UNAUTHORIZED' })
-  code: string;
+  declare code: string;
 
   @ApiProperty({
     required: false,
@@ -35,10 +35,13 @@ function problemResponse(status: number, description: string) {
 export function ApiProblemResponses(): MethodDecorator & ClassDecorator {
   return applyDecorators(
     ApiExtraModels(ProblemDetailsDto),
-    problemResponse(400, 'Invalid request'),
-    problemResponse(401, 'Authentication required'),
-    problemResponse(404, 'Resource not found'),
-    problemResponse(503, 'Upstream service unavailable'),
-    problemResponse(500, 'Internal server error'),
+    problemResponse(HttpStatus.BAD_REQUEST, 'Invalid request'),
+    problemResponse(HttpStatus.UNAUTHORIZED, 'Authentication required'),
+    problemResponse(HttpStatus.NOT_FOUND, 'Resource not found'),
+    problemResponse(
+      HttpStatus.SERVICE_UNAVAILABLE,
+      'Upstream service unavailable',
+    ),
+    problemResponse(HttpStatus.INTERNAL_SERVER_ERROR, 'Internal server error'),
   );
 }

src/common/dto-validation.spec.ts

@@ -0,0 +1,61 @@
+import { BadRequestException, ValidationPipe } from '@nestjs/common';
+import { CredentialsDto } from '../modules/auth/presentation/auth.dto';
+import {
+  CreateBankCardDto,
+  UpdateBankCardDto,
+} from '../modules/banking/bank-cards/presentation/bank-card.dto';
+
+describe('DTO validation', () => {
+  const pipe = new ValidationPipe({ transform: true, whitelist: true });
+
+  it('requires credentials and normalizes a valid email', async () => {
+    const metadata = { type: 'body' as const, metatype: CredentialsDto };
+    await expect(pipe.transform({}, metadata)).rejects.toBeInstanceOf(
+      BadRequestException,
+    );
+    await expect(
+      pipe.transform({ email: 'user@example.com' }, metadata),
+    ).rejects.toBeInstanceOf(BadRequestException);
+    await expect(
+      pipe.transform(
+        { email: ' User@Example.com ', password: 'long-enough-password' },
+        metadata,
+      ),
+    ).resolves.toEqual({
+      email: 'user@example.com',
+      password: 'long-enough-password',
+    });
+  });
+
+  it('requires and validates nested money in a new card', async () => {
+    const metadata = { type: 'body' as const, metatype: CreateBankCardDto };
+    const card = {
+      id: '00000000-0000-4000-8000-000000000001',
+      name: 'Everyday',
+      openingDate: '2026-09-13',
+    };
+    for (const openingBalance of [undefined, null, {}, { currency: 'RUB' }]) {
+      await expect(
+        pipe.transform({ ...card, openingBalance }, metadata),
+      ).rejects.toBeInstanceOf(BadRequestException);
+    }
+    const valid = {
+      ...card,
+      openingBalance: { currency: 'RUB', value: '100.00' },
+    };
+    await expect(pipe.transform(valid, metadata)).resolves.toEqual(valid);
+  });
+
+  it('keeps update fields optional while requiring version and rejecting null', async () => {
+    const metadata = { type: 'body' as const, metatype: UpdateBankCardDto };
+    await expect(pipe.transform({}, metadata)).rejects.toBeInstanceOf(
+      BadRequestException,
+    );
+    await expect(
+      pipe.transform({ version: 1, name: null }, metadata),
+    ).rejects.toBeInstanceOf(BadRequestException);
+    await expect(
+      pipe.transform({ version: 1 }, metadata),
+    ).resolves.toMatchObject({ version: 1 });
+  });
+});

src/common/logging/request-logging.middleware.ts

@@ -1,3 +1,4 @@
+import { constants as httpStatus } from 'node:http2';
 import { Injectable, NestMiddleware } from '@nestjs/common';
 import type { NextFunction, Request, Response } from 'express';
 import { randomUUID } from 'node:crypto';
@@ -46,11 +47,11 @@ export class RequestLoggingMiddleware implements NestMiddleware {
           : {}),
       };
       const level =
-        response.statusCode >= 500
+        response.statusCode >= httpStatus.HTTP_STATUS_INTERNAL_SERVER_ERROR
           ? 'error'
-          : response.statusCode === 429 ||
-              response.statusCode === 401 ||
-              response.statusCode === 403
+          : response.statusCode === httpStatus.HTTP_STATUS_TOO_MANY_REQUESTS ||
+              response.statusCode === httpStatus.HTTP_STATUS_UNAUTHORIZED ||
+              response.statusCode === httpStatus.HTTP_STATUS_FORBIDDEN
             ? 'warn'
             : 'info';
       this.logger.event(level, 'http.request.completed', context);

src/common/money.dto.ts

@@ -1,9 +1,10 @@
 import { ApiProperty } from '@nestjs/swagger';
+import type { Money } from './money.types';
 
-export class MoneyDto {
+export class MoneyDto implements Money {
   @ApiProperty()
-  currency: string;
+  declare currency: string;
 
   @ApiProperty()
-  value: string;
+  declare value: string;
 }

src/common/money.types.ts

@@ -0,0 +1 @@
+export type Money = { currency: string; value: string };

src/common/time.ts

@@ -0,0 +1,2 @@
+export const MILLISECONDS_PER_SECOND = 1_000;
+export const MILLISECONDS_PER_DAY = 86_400_000;

src/config/env.validation.ts

@@ -1,3 +1,8 @@
+const DEFAULT_PORT = 3000;
+const DEFAULT_TBANK_RATE_LIMIT_PER_SECOND = 5;
+const MAX_PORT = 65_535;
+const MIN_JWT_SECRET_LENGTH = 32;
+const TOKEN_KEY_BYTES = 32;
 export interface Environment {
   DATABASE_URL: string;
   FRONTEND_ORIGIN: string;
@@ -13,12 +18,14 @@ export interface Environment {
 export function validateEnv(config: Record<string, unknown>): Environment {
   const databaseUrl = config['DATABASE_URL'];
   const frontendOrigin = config['FRONTEND_ORIGIN'];
-  const port = config['PORT'] ?? 3000;
+  const port = config['PORT'] ?? DEFAULT_PORT;
   const jwtSecret = config['JWT_SECRET'];
   const tokenEncryptionKey = config['TOKEN_ENCRYPTION_KEY'];
   const tbankEndpoint =
     config['TBANK_GRPC_ENDPOINT'] ?? 'invest-public-api.tbank.ru:443';
-  const tbankRateLimit = config['TBANK_RATE_LIMIT_PER_SECOND'] ?? 5;
+  const tbankRateLimit =
+    config['TBANK_RATE_LIMIT_PER_SECOND'] ??
+    DEFAULT_TBANK_RATE_LIMIT_PER_SECOND;
   const tbankCaCertPath = config['TBANK_CA_CERT_PATH'];
   const logLevel = config['LOG_LEVEL'] ?? 'info';
 
@@ -47,18 +54,25 @@ export function validateEnv(config: Record<string, unknown>): Environment {
   }
 
   const parsedPort = Number(port);
-  if (!Number.isInteger(parsedPort) || parsedPort < 1 || parsedPort > 65535) {
+  if (
+    !Number.isInteger(parsedPort) ||
+    parsedPort < 1 ||
+    parsedPort > MAX_PORT
+  ) {
     throw new Error('PORT must be a valid port number');
   }
 
-  if (typeof jwtSecret !== 'string' || jwtSecret.length < 32) {
+  if (
+    typeof jwtSecret !== 'string' ||
+    jwtSecret.length < MIN_JWT_SECRET_LENGTH
+  ) {
     throw new Error('JWT_SECRET must be at least 32 characters long');
   }
 
   if (
     typeof tokenEncryptionKey !== 'string' ||
     !/^[A-Za-z0-9+/]+={0,2}$/.test(tokenEncryptionKey) ||
-    Buffer.from(tokenEncryptionKey, 'base64').length !== 32
+    Buffer.from(tokenEncryptionKey, 'base64').length !== TOKEN_KEY_BYTES
   ) {
     throw new Error(
       'TOKEN_ENCRYPTION_KEY must be a base64-encoded 32-byte key',

src/integrations/moex/moex.api.ts

@@ -0,0 +1,2 @@
+// Public cross-module surface. Nest providers are exported by the matching module.
+export { type MoexBondEvent, MoexClient } from './moex.client';

src/integrations/moex/moex.client.ts

@@ -1,5 +1,8 @@
+import { constants as httpStatus } from 'node:http2';
 import { Injectable, ServiceUnavailableException } from '@nestjs/common';
 
+const FALLBACK_PAGE_SIZE = 100;
+
 const baseUrl = 'https://iss.moex.com/iss';
 const timeoutMs = 10_000;
 
@@ -121,8 +124,8 @@ export class MoexClient {
       if (!paginated) return rows;
       const cursorBlock = response[`${block}.cursor`];
       if (!cursorBlock) {
-        if (current.length < 100) return rows;
-        start += 100;
+        if (current.length < FALLBACK_PAGE_SIZE) return rows;
+        start += FALLBACK_PAGE_SIZE;
         continue;
       }
       const cursor = parseRows(cursorBlock)[0];
@@ -145,7 +148,7 @@ export class MoexClient {
       const response = await fetch(url, {
         signal: AbortSignal.timeout(timeoutMs),
       });
-      if (response.status === 404) return null;
+      if (response.status === httpStatus.HTTP_STATUS_NOT_FOUND) return null;
       if (!response.ok) throw new Error(`MOEX HTTP ${response.status}`);
       const body: unknown = await response.json();
       if (!body || typeof body !== 'object')

src/integrations/moex/moex.module.ts

@@ -0,0 +1,8 @@
+import { Module } from '@nestjs/common';
+import { MoexClient } from './moex.client';
+
+@Module({
+  providers: [MoexClient],
+  exports: [MoexClient],
+})
+export class MoexModule {}

src/integrations/ncr/ncr-ratings.client.ts

@@ -2,6 +2,12 @@ import { Injectable, ServiceUnavailableException } from '@nestjs/common';
 import { load } from 'cheerio';
 import { LRUCache } from 'lru-cache';
 
+const REGISTRY_CACHE_TTL_MS = 21_600_000;
+const REQUEST_TIMEOUT_MS = 10_000;
+const COLUMN_COUNT = 6;
+const ISIN_COLUMN = 3;
+const DATE_COLUMN = 5;
+
 const registryUrl = 'https://ratings.ru/ratings/issues/';
 export type NcrRating = {
   agency: 'NCR';
@@ -18,7 +24,7 @@ export class NcrRatingsClient {
   private readonly cache = new LRUCache<
     string,
     Promise<Map<string, NcrRating>>
-  >({ max: 1, ttl: 6 * 60 * 60_000 });
+  >({ max: 1, ttl: REGISTRY_CACHE_TTL_MS });
 
   async rating(isin: string): Promise<NcrRating | null> {
     const key = isin.trim().toUpperCase();
@@ -38,7 +44,7 @@ export class NcrRatingsClient {
 
   private async registry(): Promise<Map<string, NcrRating>> {
     const response = await fetch(registryUrl, {
-      signal: AbortSignal.timeout(10_000),
+      signal: AbortSignal.timeout(REQUEST_TIMEOUT_MS),
     });
     if (!response.ok) throw new Error('NCR unavailable');
     const $ = load(await response.text());
@@ -49,18 +55,18 @@ export class NcrRatingsClient {
       .get();
     if (
       table.length !== 1 ||
-      headings.length !== 6 ||
+      headings.length !== COLUMN_COUNT ||
       headings[2] !== 'Рейтинг' ||
-      headings[3] !== 'ISIN' ||
-      headings[5] !== 'Дата'
+      headings[ISIN_COLUMN] !== 'ISIN' ||
+      headings[DATE_COLUMN] !== 'Дата'
     )
       throw new Error('NCR registry changed');
     const observedAt = new Date().toISOString();
     const result = new Map<string, NcrRating>();
     table.find('tbody tr').each((_, row) => {
       const cells = $(row).find('td');
-      if (cells.length !== 6) throw new Error('NCR row changed');
-      const isin = cells.eq(3).text().trim().toUpperCase();
+      if (cells.length !== COLUMN_COUNT) throw new Error('NCR row changed');
+      const isin = cells.eq(ISIN_COLUMN).text().trim().toUpperCase();
       // Unassigned issues cannot safely be matched to a held instrument.
       if (!/^[A-Z]{2}[A-Z0-9]{9}\d$/.test(isin)) return;
       const raw = cells.eq(2).text().replace(/\s+/g, ' ').trim();
@@ -73,9 +79,9 @@ export class NcrRatingsClient {
       )
         throw new Error('NCR rating changed');
       const dateParts = /^(\d{2})\.(\d{2})\.(\d{4})$/.exec(
-        cells.eq(5).text().trim(),
+        cells.eq(DATE_COLUMN).text().trim(),
       );
-      const href = cells.eq(3).find('a').attr('href');
+      const href = cells.eq(ISIN_COLUMN).find('a').attr('href');
       if (!dateParts || !href || !/^\/ratings\/issues\/\d+\/$/.test(href))
         throw new Error('NCR identity missing');
       const date = `${dateParts[3]}-${dateParts[2]}-${dateParts[1]}`;

src/integrations/ncr/ncr.api.ts

@@ -0,0 +1,2 @@
+// Public cross-module surface. Nest providers are exported by the matching module.
+export { NcrRatingsClient } from './ncr-ratings.client';

src/integrations/ncr/ncr.module.ts

@@ -0,0 +1,8 @@
+import { Module } from '@nestjs/common';
+import { NcrRatingsClient } from './ncr-ratings.client';
+
+@Module({
+  providers: [NcrRatingsClient],
+  exports: [NcrRatingsClient],
+})
+export class NcrModule {}

src/integrations/tbank/decimal.spec.ts

@@ -1,4 +1,4 @@
-import { add, formatDecimal, multiply, subtract } from '../common/decimal';
+import { add, formatDecimal, multiply, subtract } from '../../common/decimal';
 import { decimal } from './decimal';
 
 describe('decimal', () => {

src/integrations/tbank/decimal.ts

@@ -1,4 +1,4 @@
-import { Decimal } from '../common/decimal';
+import { Decimal } from '../../common/decimal';
 
 const NANO = 1_000_000_000n;
 

src/integrations/tbank/instrument-metadata.service.spec.ts

@@ -1,6 +1,7 @@
-import { InstrumentMetadataService } from './instrument-metadata.service';
 import { ServiceUnavailableException } from '@nestjs/common';
 import type { LRUCache } from 'lru-cache';
+import assert from 'node:assert/strict';
+import { InstrumentMetadataService } from './instrument-metadata.service';
 import type { TbankInstrument } from './tbank.client';
 
 describe('InstrumentMetadataService', () => {
@@ -178,7 +179,7 @@ describe('InstrumentMetadataService', () => {
   it('isolates in-flight credentials while sharing successful public metadata', async () => {
     const error = new Error('INVALID_TBANK_TOKEN');
     const known = { name: 'Облигация' };
-    let rejectInvalid!: (reason: Error) => void;
+    let rejectInvalid: ((reason: Error) => void) | undefined;
     tbank.getInstrumentByUid.mockImplementation((token: string) =>
       token === 'invalid-token'
         ? new Promise((_resolve, reject) => {
@@ -191,6 +192,7 @@ describe('InstrumentMetadataService', () => {
       service.resolve('invalid-token', 'uid-1', null),
     ).rejects.toBe(error);
     const valid = service.resolve('valid-token', 'uid-1', null);
+    assert.ok(rejectInvalid);
     rejectInvalid(error);
 
     await invalid;
@@ -237,7 +239,7 @@ describe('InstrumentMetadataService', () => {
 
   it('keeps a shared fetch alive after one caller aborts and caches its result', async () => {
     const known = { name: 'Облигация' };
-    let finish!: (value: TbankInstrument) => void;
+    let finish: ((value: TbankInstrument) => void) | undefined;
     tbank.getInstrumentByUid.mockReturnValue(
       new Promise((resolve) => {
         finish = resolve;
@@ -254,6 +256,7 @@ describe('InstrumentMetadataService', () => {
     await expect(aborted).resolves.toBeNull();
 
     const waiting = service.resolve('token', 'uid-1', null);
+    assert.ok(finish);
     finish(known);
 
     await expect(waiting).resolves.toEqual(known);
@@ -265,7 +268,7 @@ describe('InstrumentMetadataService', () => {
   });
 
   it('does not start FIGI lookup after an aborted UID lookup fails later', async () => {
-    let fail!: (reason: Error) => void;
+    let fail: ((reason: Error) => void) | undefined;
     tbank.getInstrumentByUid.mockReturnValue(
       new Promise((_resolve, reject) => {
         fail = reject;
@@ -281,6 +284,7 @@ describe('InstrumentMetadataService', () => {
     controller.abort();
     await expect(result).resolves.toBeNull();
 
+    assert.ok(fail);
     fail(new Error('INVALID_TBANK_TOKEN'));
     await Promise.resolve();
     await Promise.resolve();

src/integrations/tbank/instrument-metadata.service.ts

@@ -1,7 +1,7 @@
 import { Injectable, ServiceUnavailableException } from '@nestjs/common';
 import { LRUCache } from 'lru-cache';
 import { createHash } from 'node:crypto';
-import { StructuredLogger } from '../common/logging/structured-logger.service';
+import { StructuredLogger } from '../../common/logging/structured-logger.service';
 import { TbankClient, type TbankInstrument } from './tbank.client';
 
 const metadataForMs = 86_400_000;

src/integrations/tbank/tbank-access.service.spec.ts

@@ -5,12 +5,12 @@ import {
   ServiceUnavailableException,
 } from '@nestjs/common';
 
-jest.mock('../prisma/prisma.service', () => ({
+jest.mock('../../prisma/prisma.service', () => ({
   PrismaService: class PrismaService {},
 }));
 
-import { TbankAccessService } from './tbank-access.service';
 import type { TbankAccountContext } from './tbank-access.service';
+import { TbankAccessService } from './tbank-access.service';
 import { TbankTokenService } from './tbank-token.service';
 
 describe('TbankAccessService', () => {

src/integrations/tbank/tbank-access.service.ts

@@ -4,14 +4,14 @@ import {
   NotFoundException,
 } from '@nestjs/common';
 import { createHash } from 'node:crypto';
-import { PrismaService } from '../prisma/prisma.service';
-import { BrokerageAccountDto } from './brokerage-account.dto';
+import { PrismaService } from '../../prisma/prisma.service';
 import {
+  SupportedTbankAccount,
   accessibleTbankAccount,
   supportedTbankAccounts,
-} from './tbank-account-policy';
-import { TbankClient, TbankAccount } from './tbank.client';
+} from './tbank-account.policy';
 import { TbankTokenService } from './tbank-token.service';
+import { TbankAccount, TbankClient } from './tbank.client';
 
 export type TbankConnectionContext = {
   token: string;
@@ -30,7 +30,9 @@ export class TbankAccessService {
     private readonly tbank: TbankClient,
   ) {}
 
-  async listSupportedAccounts(userId: string): Promise<BrokerageAccountDto[]> {
+  async listSupportedAccounts(
+    userId: string,
+  ): Promise<SupportedTbankAccount[]> {
     return this.withSupportedAccounts(userId, ({ accounts }) => accounts);
   }
 
@@ -39,7 +41,7 @@ export class TbankAccessService {
     handler: (context: {
       token: string;
       generation: string;
-      accounts: BrokerageAccountDto[];
+      accounts: SupportedTbankAccount[];
     }) => Promise<T> | T,
   ): Promise<T> {
     return this.withConnection(userId, async ({ token, generation }) =>

src/integrations/tbank/tbank-account.policy.spec.ts

@@ -1,7 +1,7 @@
 import {
   accessibleTbankAccount,
   supportedTbankAccounts,
-} from './tbank-account-policy';
+} from './tbank-account.policy';
 
 describe('tbank-account-policy', () => {
   it('normalizes supported account types and fallback names', () => {

src/integrations/tbank/tbank-account.policy.ts

@@ -1,4 +1,4 @@
-import { BrokerageAccountDto } from './brokerage-account.dto';
+import { MILLISECONDS_PER_SECOND } from '../../common/time';
 import { TbankAccount } from './tbank.client';
 
 const accountTypes = {
@@ -15,10 +15,16 @@ const accountTypes = {
 } as const;
 
 type AccountType = keyof typeof accountTypes;
+export type SupportedTbankAccount = {
+  id: string;
+  name: string;
+  type: (typeof accountTypes)[AccountType]['type'];
+  openedOn: string | null;
+};
 
 export function supportedTbankAccounts(
   accounts: TbankAccount[],
-): BrokerageAccountDto[] {
+): SupportedTbankAccount[] {
   return accounts.flatMap((account) => {
     const details = accountTypes[account.type as AccountType];
     if (!details) return [];
@@ -46,7 +52,7 @@ export function accessibleTbankAccount(
 
 function openedOn(seconds: string | number | undefined): string | null {
   if (seconds === undefined) return null;
-  const date = new Date(Number(seconds) * 1000);
+  const date = new Date(Number(seconds) * MILLISECONDS_PER_SECOND);
   if (Number.isNaN(date.valueOf())) return null;
   return date.toISOString().slice(0, 10);
 }

src/integrations/tbank/tbank-market.types.ts

@@ -1,7 +1,7 @@
 import type {
   TbankDecimal,
-  TbankMoney,
   TbankInstrument,
+  TbankMoney,
   TbankTimestamp,
 } from './tbank.client';
 

src/integrations/tbank/tbank-token.service.ts

@@ -1,6 +1,6 @@
 import { BadRequestException, Injectable } from '@nestjs/common';
 import { ConfigService } from '@nestjs/config';
-import { Environment } from '../config/env.validation';
+import { Environment } from '../../config/env.validation';
 import { TbankCrypto } from './tbank.crypto';
 
 @Injectable()

src/integrations/tbank/tbank.api.ts

@@ -0,0 +1,23 @@
+// Public cross-module surface. Nest providers are exported by the matching module.
+export { InstrumentMetadataService } from './instrument-metadata.service';
+export {
+  TbankAccessService,
+  type TbankConnectionContext,
+} from './tbank-access.service';
+export {
+  type TbankBond,
+  type TbankCandle,
+  type TbankFundamentals,
+  type TbankShare,
+} from './tbank-market.types';
+export { TbankTokenService } from './tbank-token.service';
+export {
+  TbankClient,
+  type TbankDividend,
+  type TbankInstrument,
+  type TbankMoney,
+  type TbankOperationItem,
+  type TbankPortfolio,
+  type TbankPositions,
+  type TbankTimestamp,
+} from './tbank.client';

src/integrations/tbank/tbank.client.spec.ts

@@ -1,5 +1,5 @@
-import { NotFoundException, ServiceUnavailableException } from '@nestjs/common';
 import { status } from '@grpc/grpc-js';
+import { NotFoundException, ServiceUnavailableException } from '@nestjs/common';
 import { TbankClient } from './tbank.client';
 
 describe('TbankClient operations', () => {

src/integrations/tbank/tbank.client.ts

@@ -1,9 +1,4 @@
-import {
-  Injectable,
-  NotFoundException,
-  ServiceUnavailableException,
-} from '@nestjs/common';
-import { ConfigService } from '@nestjs/config';
+import { MILLISECONDS_PER_SECOND } from '../../common/time';
 import {
   ChannelCredentials,
   Client,
@@ -14,20 +9,33 @@ import {
   status,
 } from '@grpc/grpc-js';
 import { loadSync } from '@grpc/proto-loader';
+import {
+  Injectable,
+  NotFoundException,
+  ServiceUnavailableException,
+} from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
 import { existsSync, readFileSync } from 'node:fs';
 import { join } from 'node:path';
-import { Environment } from '../config/env.validation';
-import { StructuredLogger } from '../common/logging/structured-logger.service';
+import { StructuredLogger } from '../../common/logging/structured-logger.service';
+import { Environment } from '../../config/env.validation';
 
 import type {
-  TbankShare,
   TbankBond,
-  TbankCoupon,
   TbankCandle,
-  TbankLastPrice,
+  TbankCoupon,
   TbankFundamentals,
+  TbankLastPrice,
+  TbankShare,
 } from './tbank-market.types';
 
+const RATE_WINDOW_MS = 1_000;
+const METADATA_MAX_ATTEMPTS = 3;
+const RPC_MAX_ATTEMPTS = 2;
+const MAX_QUEUE_SIZE = 50;
+const METADATA_RETRY_DELAY_MS = 2_000;
+const RPC_RETRY_DELAY_MS = 1_000;
+
 const requestDeadlineMs = 15_000;
 
 type Unary<Request, Response> = (
@@ -134,7 +142,7 @@ class RateLimiter {
 
   private drain(): void {
     const now = Date.now();
-    if (now - this.windowStartedAt >= 1000) {
+    if (now - this.windowStartedAt >= RATE_WINDOW_MS) {
       this.windowStartedAt = now;
       this.starts = 0;
     }
@@ -145,7 +153,7 @@ class RateLimiter {
     if (this.waiting.length && this.starts === this.perSecond) {
       setTimeout(
         () => this.drain(),
-        Math.max(1, 1000 - (now - this.windowStartedAt)),
+        Math.max(1, RATE_WINDOW_MS - (now - this.windowStartedAt)),
       );
     }
   }
@@ -164,10 +172,13 @@ export class TbankClient {
     config: ConfigService<Environment, true>,
     private readonly logger: StructuredLogger,
   ) {
-    const sourceProtoRoot = join(process.cwd(), 'src/tbank/proto/contracts');
+    const sourceProtoRoot = join(
+      process.cwd(),
+      'src/integrations/tbank/proto/contracts',
+    );
     const protoRoot = existsSync(sourceProtoRoot)
       ? sourceProtoRoot
-      : join(process.cwd(), 'dist/tbank/proto/contracts');
+      : join(process.cwd(), 'dist/integrations/tbank/proto/contracts');
     const definition = loadSync(
       [
         'users.proto',
@@ -233,11 +244,12 @@ export class TbankClient {
   }
 
   getOpenAccounts(token: string): Promise<TbankAccount[]> {
-    return this.call(token, this.users, 'getAccounts', {
-      status: 'ACCOUNT_STATUS_OPEN',
-    }).then(
-      (response: { accounts?: TbankAccount[] }) => response.accounts ?? [],
-    );
+    return this.call<{ accounts?: TbankAccount[] }>(
+      token,
+      this.users,
+      'getAccounts',
+      { status: 'ACCOUNT_STATUS_OPEN' },
+    ).then((response) => response.accounts ?? []);
   }
 
   getPortfolio(token: string, accountId: string): Promise<TbankPortfolio> {
@@ -275,13 +287,16 @@ export class TbankClient {
     from: string,
     to: string,
   ): Promise<TbankDividend[]> {
-    return this.call(token, this.instruments, 'getDividends', {
-      instrumentId,
-      from: { seconds: String(utcSeconds(from)) },
-      to: { seconds: String(utcSeconds(to)) },
-    }).then(
-      (response: { dividends?: TbankDividend[] }) => response.dividends ?? [],
-    );
+    return this.call<{ dividends?: TbankDividend[] }>(
+      token,
+      this.instruments,
+      'getDividends',
+      {
+        instrumentId,
+        from: { seconds: String(utcSeconds(from)) },
+        to: { seconds: String(utcSeconds(to)) },
+      },
+    ).then((response) => response.dividends ?? []);
   }
 
   findShares(token: string, query: string): Promise<TbankShare[]> {
@@ -415,8 +430,12 @@ export class TbankClient {
       'getCandles',
       {
         instrumentId: uid,
-        from: { seconds: String(Math.floor(from.valueOf() / 1000)) },
-        to: { seconds: String(Math.floor(to.valueOf() / 1000)) },
+        from: {
+          seconds: String(Math.floor(from.valueOf() / MILLISECONDS_PER_SECOND)),
+        },
+        to: {
+          seconds: String(Math.floor(to.valueOf() / MILLISECONDS_PER_SECOND)),
+        },
         interval: 'CANDLE_INTERVAL_DAY',
         limit: 2400,
       },
@@ -449,10 +468,10 @@ export class TbankClient {
     request: object,
   ): Promise<Response> {
     const metadataCall = method === 'getInstrumentBy';
-    const maxAttempts = metadataCall ? 3 : 2;
+    const maxAttempts = metadataCall ? METADATA_MAX_ATTEMPTS : RPC_MAX_ATTEMPTS;
     for (let attempts = 1; attempts <= maxAttempts; attempts += 1) {
       const startedAt = performance.now();
-      const queueFull = this.queue.size >= 50;
+      const queueFull = this.queue.size >= MAX_QUEUE_SIZE;
       try {
         if (queueFull)
           throw new ServiceUnavailableException({ code: 'TBANK_UNAVAILABLE' });
@@ -485,7 +504,12 @@ export class TbankClient {
             durationMs: Math.round(performance.now() - startedAt),
           });
           await new Promise((resolve) =>
-            setTimeout(resolve, metadataCall ? attempts * 2000 : 1000),
+            setTimeout(
+              resolve,
+              metadataCall
+                ? attempts * METADATA_RETRY_DELAY_MS
+                : RPC_RETRY_DELAY_MS,
+            ),
           );
           continue;
         }
@@ -530,5 +554,5 @@ export class TbankClient {
 }
 
 function utcSeconds(date: string): number {
-  return Math.floor(Date.parse(`${date}T00:00:00Z`) / 1000);
+  return Math.floor(Date.parse(`${date}T00:00:00Z`) / MILLISECONDS_PER_SECOND);
 }

src/integrations/tbank/tbank.crypto.ts

@@ -1,5 +1,7 @@
 import { createCipheriv, createDecipheriv, randomBytes } from 'node:crypto';
 
+const KEY_SIZE_BYTES = 32;
+
 const VERSION = 1;
 const NONCE_SIZE = 12;
 const TAG_SIZE = 16;
@@ -9,7 +11,8 @@ export class TbankCrypto {
 
   static fromBase64(key: string): TbankCrypto {
     const decoded = Buffer.from(key, 'base64');
-    if (decoded.length !== 32) throw new Error('Invalid token encryption key');
+    if (decoded.length !== KEY_SIZE_BYTES)
+      throw new Error('Invalid token encryption key');
     return new TbankCrypto(decoded);
   }
 

src/integrations/tbank/tbank.module.ts

@@ -0,0 +1,21 @@
+import { Module } from '@nestjs/common';
+import { InstrumentMetadataService } from './instrument-metadata.service';
+import { TbankAccessService } from './tbank-access.service';
+import { TbankTokenService } from './tbank-token.service';
+import { TbankClient } from './tbank.client';
+
+@Module({
+  providers: [
+    TbankClient,
+    TbankTokenService,
+    TbankAccessService,
+    InstrumentMetadataService,
+  ],
+  exports: [
+    TbankClient,
+    TbankTokenService,
+    TbankAccessService,
+    InstrumentMetadataService,
+  ],
+})
+export class TbankModule {}

src/modules/auth/application/auth.service.spec.ts

@@ -7,7 +7,7 @@ jest.mock('bcrypt', () => ({
   compare: jest.fn(() => Promise.resolve(true)),
 }));
 
-jest.mock('../prisma/prisma.service', () => ({
+jest.mock('../../../prisma/prisma.service', () => ({
   PrismaService: class PrismaService {},
 }));
 

src/modules/auth/application/auth.service.ts

@@ -6,10 +6,13 @@ import {
 import { JwtService } from '@nestjs/jwt';
 import * as bcrypt from 'bcrypt';
 import { createHash, randomUUID } from 'crypto';
-import { Session, User } from '../../generated/prisma/client';
-import { PrismaService } from '../prisma/prisma.service';
+import { Session, User } from '../../../../generated/prisma/client';
+import { PrismaService } from '../../../prisma/prisma.service';
 import { AuthUser, RefreshPayload } from './auth.types';
 
+const PASSWORD_HASH_ROUNDS = 12;
+const REFRESH_TTL_MS = 604_800_000;
+
 const ACCESS_TTL = '15m';
 const REFRESH_TTL = '7d';
 const DUMMY_PASSWORD_HASH =
@@ -39,7 +42,7 @@ export class AuthService {
         data: {
           id: randomUUID(),
           email: normalizedEmail,
-          passwordHash: await bcrypt.hash(password, 12),
+          passwordHash: await bcrypt.hash(password, PASSWORD_HASH_ROUNDS),
         },
       });
     } catch (error) {
@@ -162,7 +165,7 @@ export class AuthService {
     );
     const data = {
       refreshTokenHash: this.hash(refreshToken),
-      expiresAt: new Date(Date.now() + 7 * 24 * 60 * 60 * 1000),
+      expiresAt: new Date(Date.now() + REFRESH_TTL_MS),
     };
     if (expectedRefreshTokenHash) {
       const updated = await this.prisma.session.updateMany({

src/modules/auth/auth.api.ts

@@ -0,0 +1,3 @@
+// Public cross-module surface. Nest providers are exported by the matching module.
+export { type AccessPayload } from './application/auth.types';
+export { JwtAuthGuard } from './presentation/jwt-auth.guard';

src/modules/auth/auth.module.ts

@@ -2,11 +2,11 @@ import { Module } from '@nestjs/common';
 import { ConfigModule, ConfigService } from '@nestjs/config';
 import { JwtModule } from '@nestjs/jwt';
 import { PassportModule } from '@nestjs/passport';
-import { Environment } from '../config/env.validation';
-import { AuthController } from './auth.controller';
-import { AuthService } from './auth.service';
-import { JwtAuthGuard } from './jwt-auth.guard';
-import { JwtStrategy } from './jwt.strategy';
+import { Environment } from '../../config/env.validation';
+import { AuthController } from './presentation/auth.controller';
+import { AuthService } from './application/auth.service';
+import { JwtAuthGuard } from './presentation/jwt-auth.guard';
+import { JwtStrategy } from './infrastructure/jwt.strategy';
 
 @Module({
   imports: [
@@ -19,6 +19,7 @@ import { JwtStrategy } from './jwt.strategy';
       }),
     }),
   ],
+  exports: [JwtAuthGuard],
   controllers: [AuthController],
   providers: [AuthService, JwtStrategy, JwtAuthGuard],
 })

src/modules/auth/infrastructure/jwt.strategy.ts

@@ -2,8 +2,8 @@ import { Injectable, UnauthorizedException } from '@nestjs/common';
 import { ConfigService } from '@nestjs/config';
 import { PassportStrategy } from '@nestjs/passport';
 import { ExtractJwt, Strategy } from 'passport-jwt';
-import { Environment } from '../config/env.validation';
-import { AccessPayload } from './auth.types';
+import { Environment } from '../../../config/env.validation';
+import { AccessPayload } from '../application/auth.types';
 
 @Injectable()
 export class JwtStrategy extends PassportStrategy(Strategy) {

src/modules/auth/presentation/auth.controller.spec.ts

@@ -1,6 +1,6 @@
 import { HTTP_CODE_METADATA } from '@nestjs/common/constants';
 
-jest.mock('./auth.service', () => ({
+jest.mock('../application/auth.service', () => ({
   AuthService: class AuthService {},
 }));
 

src/modules/auth/presentation/auth.controller.ts

@@ -3,11 +3,12 @@ import {
   Controller,
   Get,
   HttpCode,
+  HttpStatus,
   Post,
   Req,
   Res,
-  UseGuards,
   UnauthorizedException,
+  UseGuards,
 } from '@nestjs/common';
 import {
   ApiBearerAuth,
@@ -17,29 +18,29 @@ import {
   ApiTags,
 } from '@nestjs/swagger';
 import type { Request, Response } from 'express';
+import { ApiProblemResponses } from '../../../common/decorators/api-safe-error-response.decorator';
 import { CredentialsDto } from './auth.dto';
-import { AuthService } from './auth.service';
-import { AccessPayload } from './auth.types';
+import { AuthService } from '../application/auth.service';
+import { AccessPayload } from '../application/auth.types';
 import { JwtAuthGuard } from './jwt-auth.guard';
-import { ApiProblemResponses } from '../common/decorators/api-safe-error-response.decorator';
 
 const REFRESH_COOKIE = 'refresh_token';
 const COOKIE_PATH = '/api/v1/auth';
 
 class UserDto {
   @ApiProperty()
-  id: string;
+  declare id: string;
 
   @ApiProperty()
-  email: string;
+  declare email: string;
 }
 
 class AuthenticationDto {
   @ApiProperty()
-  accessToken: string;
+  declare accessToken: string;
 
   @ApiProperty({ type: UserDto })
-  user: UserDto;
+  declare user: UserDto;
 }
 
 @ApiTags('auth')
@@ -49,7 +50,7 @@ export class AuthController {
   constructor(private readonly auth: AuthService) {}
 
   @Post('register')
-  @HttpCode(200)
+  @HttpCode(HttpStatus.OK)
   @ApiOkResponse({ type: AuthenticationDto })
   async register(
     @Body() credentials: CredentialsDto,
@@ -62,7 +63,7 @@ export class AuthController {
   }
 
   @Post('login')
-  @HttpCode(200)
+  @HttpCode(HttpStatus.OK)
   @ApiOkResponse({ type: AuthenticationDto })
   async login(
     @Body() credentials: CredentialsDto,
@@ -75,7 +76,7 @@ export class AuthController {
   }
 
   @Post('refresh')
-  @HttpCode(200)
+  @HttpCode(HttpStatus.OK)
   @ApiOkResponse({ type: AuthenticationDto })
   async refresh(
     @Req() request: Request,
@@ -92,7 +93,7 @@ export class AuthController {
   }
 
   @Post('logout')
-  @HttpCode(204)
+  @HttpCode(HttpStatus.NO_CONTENT)
   @ApiNoContentResponse()
   async logout(
     @Req() request: Request,

src/modules/auth/presentation/auth.dto.ts

@@ -1,26 +1,32 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { Transform } from 'class-transformer';
 import {
   IsString,
   MinLength,
   Validate,
   ValidatorConstraint,
 } from 'class-validator';
-import { Transform } from 'class-transformer';
-import { ApiProperty } from '@nestjs/swagger';
+
+const MAX_EMAIL_LENGTH = 254;
+const ASCII_SPACE = 32;
+const ASCII_DELETE = 127;
+const MIN_PASSWORD_LENGTH = 12;
+const MAX_PASSWORD_BYTES = 72;
 
 @ValidatorConstraint({ name: 'email' })
 class EmailConstraint {
   validate(value: unknown): boolean {
     return (
       typeof value === 'string' &&
-      value.length <= 254 &&
+      value.length <= MAX_EMAIL_LENGTH &&
       value.split('@').length === 2 &&
       !value
         .split('')
         .some(
           (character) =>
             /\s/.test(character) ||
-            character.charCodeAt(0) < 32 ||
-            character.charCodeAt(0) === 127,
+            character.charCodeAt(0) < ASCII_SPACE ||
+            character.charCodeAt(0) === ASCII_DELETE,
         ) &&
       value.split('@').every(Boolean)
     );
@@ -33,7 +39,10 @@ class EmailConstraint {
 @ValidatorConstraint({ name: 'passwordBytes' })
 class PasswordBytesConstraint {
   validate(value: unknown): boolean {
-    return typeof value === 'string' && Buffer.byteLength(value, 'utf8') <= 72;
+    return (
+      typeof value === 'string' &&
+      Buffer.byteLength(value, 'utf8') <= MAX_PASSWORD_BYTES
+    );
   }
   defaultMessage(): string {
     return 'must not exceed 72 UTF-8 bytes';
@@ -47,11 +56,15 @@ export class CredentialsDto {
     typeof value === 'string' ? value.trim().toLowerCase() : value,
   )
   @Validate(EmailConstraint)
-  email: string;
+  declare email: string;
 
-  @ApiProperty({ minLength: 12, maxLength: 72, example: 'a secure password' })
+  @ApiProperty({
+    minLength: MIN_PASSWORD_LENGTH,
+    maxLength: MAX_PASSWORD_BYTES,
+    example: 'a secure password',
+  })
   @IsString()
-  @MinLength(12)
+  @MinLength(MIN_PASSWORD_LENGTH)
   @Validate(PasswordBytesConstraint)
-  password: string;
+  declare password: string;
 }

src/modules/auth/presentation/jwt-auth.guard.ts

@@ -1,7 +1,7 @@
 import { ExecutionContext, Injectable } from '@nestjs/common';
 import { AuthGuard } from '@nestjs/passport';
-import { RequestContextService } from '../common/logging/request-context.service';
-import { AccessPayload } from './auth.types';
+import { RequestContextService } from '../../../common/logging/request-context.service';
+import { AccessPayload } from '../application/auth.types';
 
 @Injectable()
 export class JwtAuthGuard extends AuthGuard('jwt') {

src/modules/banking/bank-cards/application/bank-card-input.ts

@@ -0,0 +1,135 @@
+import {
+  MAX_CARD_NAME_LENGTH,
+  MAX_OPERATION_DESCRIPTION_LENGTH,
+} from '../domain/bank-card-limits';
+import {
+  BadRequestException,
+  ConflictException,
+  NotFoundException,
+} from '@nestjs/common';
+import { createHash } from 'node:crypto';
+import {
+  bankPaymentSystems,
+  BankPeriodQueryDto,
+  CreateBankCardDto,
+  CreateBankOperationDto,
+} from '../presentation/bank-card.dto';
+import { isCalendarDate, moscowToday } from '../domain/bank-card.calculations';
+import { parseRubMoney } from '../domain/rub-money';
+
+export const BankErrorCode = {
+  InvalidInput: 'BANK_INVALID_INPUT',
+  VersionConflict: 'BANK_VERSION_CONFLICT',
+  NotFound: 'BANK_NOT_FOUND',
+  InvalidMoney: 'BANK_INVALID_MONEY',
+  InvalidDate: 'BANK_INVALID_DATE',
+  ImmutableOperation: 'BANK_IMMUTABLE_OPERATION',
+  InvalidRefund: 'BANK_INVALID_REFUND',
+  RefundLimit: 'BANK_REFUND_LIMIT',
+  DependentRefunds: 'BANK_DEPENDENT_REFUNDS',
+  IntentConflict: 'BANK_INTENT_CONFLICT',
+  OperationDeleted: 'BANK_OPERATION_DELETED',
+  CardArchived: 'BANK_CARD_ARCHIVED',
+  OpeningDateConflict: 'BANK_OPENING_DATE_CONFLICT',
+  WriteConflict: 'BANK_WRITE_CONFLICT',
+  DuplicateCategory: 'BANK_DUPLICATE_CATEGORY',
+} as const;
+export type BankErrorCode = (typeof BankErrorCode)[keyof typeof BankErrorCode];
+
+export function fail(code: BankErrorCode = BankErrorCode.InvalidInput): never {
+  throw new BadRequestException({ code });
+}
+export function periodBounds(query: BankPeriodQueryDto) {
+  if (query.month && !query.from && !query.to) {
+    const from = `${query.month}-01`;
+    if (!isCalendarDate(from)) return fail();
+    const end = new Date(`${from}T00:00:00Z`);
+    end.setUTCMonth(end.getUTCMonth() + 1, 0);
+    return { from, to: end.toISOString().slice(0, 10) };
+  }
+  if (
+    query.month ||
+    !query.from ||
+    !query.to ||
+    !isCalendarDate(query.from) ||
+    !isCalendarDate(query.to) ||
+    query.from > query.to
+  )
+    return fail();
+  return { from: query.from, to: query.to };
+}
+export function conflict(
+  code: BankErrorCode = BankErrorCode.VersionConflict,
+): never {
+  throw new ConflictException({ code });
+}
+export function missing(): never {
+  throw new NotFoundException({ code: BankErrorCode.NotFound });
+}
+export const fingerprint = (value: unknown) =>
+  createHash('sha256')
+    .update(
+      JSON.stringify(value, (_key, item: unknown) =>
+        typeof item === 'bigint' ? item.toString() : item,
+      ),
+    )
+    .digest('hex');
+export function amount(
+  value: Parameters<typeof parseRubMoney>[0],
+  positive = false,
+) {
+  try {
+    return parseRubMoney(value, positive);
+  } catch {
+    return fail(BankErrorCode.InvalidMoney);
+  }
+}
+export function calendar(value: string) {
+  if (!isCalendarDate(value)) fail(BankErrorCode.InvalidDate);
+  return value;
+}
+export function currentDate(value: string) {
+  calendar(value);
+  if (value > moscowToday()) fail(BankErrorCode.InvalidDate);
+}
+export function name(value: string, max: number) {
+  if (typeof value !== 'string' || !value.trim() || value.trim().length > max)
+    fail();
+  return value.trim();
+}
+export function cardInput(dto: CreateBankCardDto) {
+  const bankName = dto.bankName?.trim() || null;
+  if (bankName && bankName.length > MAX_CARD_NAME_LENGTH) fail();
+  if (dto.lastFour != null && !/^\d{4}$/.test(dto.lastFour)) fail();
+  if (
+    dto.paymentSystem != null &&
+    !bankPaymentSystems.some((system) => system === dto.paymentSystem)
+  )
+    fail();
+  return {
+    ...(dto.paymentSystem == null ? {} : { paymentSystem: dto.paymentSystem }),
+    name: name(dto.name, MAX_CARD_NAME_LENGTH),
+    bankName,
+    lastFour: dto.lastFour || null,
+    openingBalanceKopecks: amount(dto.openingBalance),
+    openingDate: calendar(dto.openingDate),
+  };
+}
+export function operationInput(dto: CreateBankOperationDto) {
+  if (
+    dto.description != null &&
+    (typeof dto.description !== 'string' ||
+      dto.description.length > MAX_OPERATION_DESCRIPTION_LENGTH)
+  )
+    fail();
+  return {
+    kind: dto.kind,
+    cardId: dto.cardId,
+    targetCardId: dto.targetCardId ?? null,
+    categoryId: dto.categoryId ?? null,
+    originalExpenseId: dto.originalExpenseId ?? null,
+    amountKopecks: amount(dto.amount, true),
+    date: calendar(dto.date),
+    description: dto.description || null,
+  };
+}

src/modules/banking/bank-cards/application/bank-cards.service.ts

@@ -0,0 +1,147 @@
+import { Injectable } from '@nestjs/common';
+import { BankCard, Prisma } from '../../../../../generated/prisma/client';
+import { PrismaService } from '../../../../prisma/prisma.service';
+import {
+  BankCardDto,
+  CreateBankCardDto,
+  UpdateBankCardDto,
+} from '../presentation/bank-card.dto';
+import { bankBalance } from '../domain/bank-card.calculations';
+import { rubMoney } from '../domain/rub-money';
+
+import {
+  cardInput,
+  BankErrorCode,
+  conflict,
+  currentDate,
+  fail,
+  fingerprint,
+  missing,
+} from './bank-card-input';
+import { BankCardsRepository } from '../infrastructure/bank-cards.repository';
+type Tx = Prisma.TransactionClient;
+@Injectable()
+export class BankCardsService {
+  constructor(
+    private readonly prisma: PrismaService,
+    private readonly repository: BankCardsRepository,
+  ) {}
+  private async cardView(tx: Tx, card: BankCard): Promise<BankCardDto> {
+    const rows = await tx.bankCardOperation.findMany({
+      where: {
+        userId: card.userId,
+        deletedAt: null,
+        OR: [{ cardId: card.id }, { targetCardId: card.id }],
+      },
+    });
+    return {
+      id: card.id,
+      name: card.name,
+      bankName: card.bankName,
+      lastFour: card.lastFour,
+      paymentSystem: card.paymentSystem,
+      openingDate: card.openingDate,
+      openingBalance: rubMoney(card.openingBalanceKopecks),
+      balance: rubMoney(bankBalance(card.id, card.openingBalanceKopecks, rows)),
+      version: card.version,
+      archivedAt: card.archivedAt?.toISOString() ?? null,
+    };
+  }
+  list(userId: string, includeArchived = false) {
+    return this.prisma.$transaction(async (tx) =>
+      Promise.all(
+        (
+          await tx.bankCard.findMany({
+            where: { userId, ...(includeArchived ? {} : { archivedAt: null }) },
+            orderBy: [{ createdAt: 'asc' }, { id: 'asc' }],
+          })
+        ).map((card) => this.cardView(tx, card)),
+      ),
+    );
+  }
+  get(userId: string, id: string) {
+    return this.prisma.$transaction(async (tx) =>
+      this.cardView(tx, await this.repository.card(tx, userId, id)),
+    );
+  }
+  createCard(userId: string, dto: CreateBankCardDto) {
+    const input = cardInput(dto),
+      hash = fingerprint(input);
+    return this.repository.write(async (tx) => {
+      const existing = await tx.bankCard.findUnique({ where: { id: dto.id } });
+      if (existing) {
+        if (existing.userId !== userId) missing();
+        if (existing.createFingerprint !== hash)
+          conflict(BankErrorCode.IntentConflict);
+        return this.cardView(tx, existing);
+      }
+      currentDate(input.openingDate);
+      await this.repository.seed(tx, userId);
+      return this.cardView(
+        tx,
+        await tx.bankCard.create({
+          data: { ...input, id: dto.id, userId, createFingerprint: hash },
+        }),
+      );
+    });
+  }
+  updateCard(userId: string, id: string, dto: UpdateBankCardDto) {
+    return this.repository.write(async (tx) => {
+      const previous = await this.repository.card(tx, userId, id);
+      if (previous.version !== dto.version) conflict();
+      const input = cardInput({
+        id,
+        name: dto.name ?? previous.name,
+        bankName:
+          dto.bankName === undefined
+            ? (previous.bankName ?? undefined)
+            : (dto.bankName ?? undefined),
+        lastFour:
+          dto.lastFour === undefined
+            ? (previous.lastFour ?? undefined)
+            : (dto.lastFour ?? undefined),
+        paymentSystem:
+          dto.paymentSystem === undefined
+            ? previous.paymentSystem
+            : dto.paymentSystem,
+        openingBalance:
+          dto.openingBalance ?? rubMoney(previous.openingBalanceKopecks),
+        openingDate: dto.openingDate ?? previous.openingDate,
+      });
+      const financial =
+        input.openingBalanceKopecks !== previous.openingBalanceKopecks ||
+        input.openingDate !== previous.openingDate;
+      if (financial && previous.archivedAt)
+        conflict(BankErrorCode.CardArchived);
+      currentDate(input.openingDate);
+      if (
+        await tx.bankCardOperation.findFirst({
+          where: {
+            userId,
+            deletedAt: null,
+            date: { lt: input.openingDate },
+            OR: [{ cardId: id }, { targetCardId: id }],
+          },
+        })
+      )
+        fail(BankErrorCode.OpeningDateConflict);
+      const changed = await tx.bankCard.updateMany({
+        where: { id, userId, version: dto.version },
+        data: {
+          ...input,
+          paymentSystem: input.paymentSystem ?? null,
+          version: { increment: 1 },
+          ...(dto.archived === undefined
+            ? {}
+            : {
+                archivedAt: dto.archived
+                  ? (previous.archivedAt ?? new Date())
+                  : null,
+              }),
+        },
+      });
+      if (changed.count !== 1) conflict();
+      return this.cardView(tx, await this.repository.card(tx, userId, id));
+    });
+  }
+}

src/modules/banking/bank-cards/application/bank-operations.service.ts

@@ -0,0 +1,343 @@
+import { BankOperationKind } from '../domain/bank-operation-kind';
+import { GoneException, Injectable } from '@nestjs/common';
+import {
+  BankCardOperation,
+  Prisma,
+} from '../../../../../generated/prisma/client';
+import { PrismaService } from '../../../../prisma/prisma.service';
+import {
+  BankOperationDto,
+  DEFAULT_BANK_PAGE_SIZE,
+  BankOperationsQueryDto,
+  BankPageQueryDto,
+  CreateBankOperationDto,
+  UpdateBankOperationDto,
+} from '../presentation/bank-card.dto';
+import { rubMoney } from '../domain/rub-money';
+
+import {
+  BankErrorCode,
+  conflict,
+  currentDate,
+  fail,
+  fingerprint,
+  missing,
+  operationInput,
+  periodBounds,
+} from './bank-card-input';
+import { BankCardsRepository } from '../infrastructure/bank-cards.repository';
+type Tx = Prisma.TransactionClient;
+@Injectable()
+export class BankOperationsService {
+  constructor(
+    private readonly prisma: PrismaService,
+    private readonly repository: BankCardsRepository,
+  ) {}
+  private async operationView(
+    tx: Tx,
+    row: BankCardOperation,
+  ): Promise<BankOperationDto> {
+    const card = await this.repository.card(tx, row.userId, row.cardId);
+    const target = row.targetCardId
+      ? await this.repository.card(tx, row.userId, row.targetCardId)
+      : null;
+    const source = row.originalExpenseId
+      ? await this.repository.operation(tx, row.userId, row.originalExpenseId)
+      : null;
+    const categoryId = source?.categoryId ?? row.categoryId;
+    const category = categoryId
+      ? await tx.expenseCategory.findFirst({
+          where: { id: categoryId, userId: row.userId },
+        })
+      : null;
+    const refunds =
+      row.kind === BankOperationKind.Expense || source
+        ? await tx.bankCardOperation.findMany({
+            where: {
+              userId: row.userId,
+              originalExpenseId: source?.id ?? row.id,
+              deletedAt: null,
+              ...(source ? { id: { not: row.id } } : {}),
+            },
+          })
+        : [];
+    return {
+      id: row.id,
+      kind: row.kind as BankOperationDto['kind'],
+      cardId: row.cardId,
+      cardName: card.name,
+      targetCardId: row.targetCardId,
+      targetCardName: target?.name ?? null,
+      categoryId,
+      categoryName: category?.name ?? null,
+      originalExpenseId: row.originalExpenseId,
+      amount: rubMoney(row.amountKopecks),
+      availableRefund:
+        row.kind === BankOperationKind.Expense || source
+          ? rubMoney(
+              (source?.amountKopecks ?? row.amountKopecks) -
+                refunds.reduce((sum, r) => sum + r.amountKopecks, 0n),
+            )
+          : null,
+      date: row.date,
+      description: row.description,
+      version: row.version,
+      createdAt: row.createdAt.toISOString(),
+    };
+  }
+  private async validateOperation(
+    tx: Tx,
+    userId: string,
+    input: ReturnType<typeof operationInput>,
+    old?: BankCardOperation,
+  ) {
+    const cards = new Set(
+      [input.cardId, input.targetCardId, old?.cardId, old?.targetCardId].filter(
+        (id): id is string => Boolean(id),
+      ),
+    );
+    currentDate(input.date);
+    for (const id of cards) {
+      const card = await this.repository.card(tx, userId, id, true);
+      if (
+        (id === input.cardId || id === input.targetCardId) &&
+        input.date < card.openingDate
+      )
+        fail(BankErrorCode.InvalidDate);
+    }
+    if (
+      old &&
+      (old.kind !== input.kind ||
+        old.originalExpenseId !== input.originalExpenseId)
+    )
+      fail(BankErrorCode.ImmutableOperation);
+    if (input.kind === BankOperationKind.Transfer) {
+      if (
+        !input.targetCardId ||
+        input.targetCardId === input.cardId ||
+        input.categoryId ||
+        input.originalExpenseId
+      )
+        fail();
+    } else if (input.targetCardId) fail();
+    if (input.kind === BankOperationKind.Expense) {
+      if (input.originalExpenseId) fail();
+      if (!input.categoryId) {
+        const category = await tx.expenseCategory.findUnique({
+          where: { userId_seedKey: { userId, seedKey: 'other' } },
+        });
+        if (!category) missing();
+        input.categoryId = category.id;
+      }
+      if (
+        !(await tx.expenseCategory.findFirst({
+          where: { userId, id: input.categoryId },
+        }))
+      )
+        missing();
+    } else if (input.categoryId) fail();
+    if (input.kind !== BankOperationKind.Refund && input.originalExpenseId)
+      fail();
+    if (input.kind === BankOperationKind.Refund) {
+      if (!input.originalExpenseId) fail();
+      const source = await this.repository.operation(
+        tx,
+        userId,
+        input.originalExpenseId,
+      );
+      if (
+        source.deletedAt ||
+        source.kind !== BankOperationKind.Expense ||
+        source.cardId !== input.cardId
+      )
+        fail(BankErrorCode.InvalidRefund);
+      if (
+        (
+          await tx.bankCardOperation.updateMany({
+            where: {
+              id: source.id,
+              userId,
+              version: source.version,
+              deletedAt: null,
+            },
+            data: { version: { increment: 1 } },
+          })
+        ).count !== 1
+      )
+        conflict();
+      const refunds = await tx.bankCardOperation.findMany({
+        where: {
+          userId,
+          originalExpenseId: source.id,
+          deletedAt: null,
+          ...(old ? { id: { not: old.id } } : {}),
+        },
+      });
+      if (input.date < source.date) fail(BankErrorCode.InvalidDate);
+      if (
+        refunds.reduce((sum, r) => sum + r.amountKopecks, 0n) +
+          input.amountKopecks >
+        source.amountKopecks
+      )
+        conflict(BankErrorCode.RefundLimit);
+    }
+    if (old?.kind === BankOperationKind.Expense) {
+      const refunds = await tx.bankCardOperation.findMany({
+        where: { userId, originalExpenseId: old.id, deletedAt: null },
+      });
+      if (
+        refunds.length &&
+        (input.cardId !== old.cardId ||
+          refunds.some((row) => row.date < input.date) ||
+          refunds.reduce((sum, row) => sum + row.amountKopecks, 0n) >
+            input.amountKopecks)
+      )
+        conflict(BankErrorCode.DependentRefunds);
+    }
+  }
+  createOperation(userId: string, dto: CreateBankOperationDto) {
+    const normalized = operationInput(dto),
+      hash = fingerprint(normalized);
+    return this.repository.write(async (tx) => {
+      const existing = await tx.bankCardOperation.findUnique({
+        where: { id: dto.id },
+      });
+      if (existing) {
+        if (existing.userId !== userId) missing();
+        if (existing.createFingerprint !== hash)
+          conflict(BankErrorCode.IntentConflict);
+        if (existing.deletedAt)
+          throw new GoneException({ code: BankErrorCode.OperationDeleted });
+        return this.operationView(tx, existing);
+      }
+      const input = { ...normalized };
+      await this.validateOperation(tx, userId, input);
+      return this.operationView(
+        tx,
+        await tx.bankCardOperation.create({
+          data: { ...input, id: dto.id, userId, createFingerprint: hash },
+        }),
+      );
+    });
+  }
+  getOperation(userId: string, id: string) {
+    return this.prisma.$transaction(async (tx) => {
+      const row = await this.repository.operation(tx, userId, id);
+      if (row.deletedAt) missing();
+      return this.operationView(tx, row);
+    });
+  }
+  updateOperation(userId: string, id: string, dto: UpdateBankOperationDto) {
+    return this.repository.write(async (tx) => {
+      const old = await this.repository.operation(tx, userId, id);
+      if (old.deletedAt) missing();
+      if (old.version !== dto.version) conflict();
+      const input = operationInput({
+        id,
+        kind: dto.kind ?? (old.kind as CreateBankOperationDto['kind']),
+        cardId: dto.cardId ?? old.cardId,
+        targetCardId: dto.targetCardId ?? old.targetCardId ?? undefined,
+        categoryId: dto.categoryId ?? old.categoryId ?? undefined,
+        originalExpenseId:
+          dto.originalExpenseId ?? old.originalExpenseId ?? undefined,
+        amount: dto.amount ?? rubMoney(old.amountKopecks),
+        date: dto.date ?? old.date,
+        description: dto.description ?? old.description ?? undefined,
+      });
+      await this.validateOperation(tx, userId, input, old);
+      if (
+        (
+          await tx.bankCardOperation.updateMany({
+            where: { id, userId, version: dto.version, deletedAt: null },
+            data: { ...input, version: { increment: 1 } },
+          })
+        ).count !== 1
+      )
+        conflict();
+      return this.operationView(
+        tx,
+        await this.repository.operation(tx, userId, id),
+      );
+    });
+  }
+  deleteOperation(userId: string, id: string, version: number) {
+    return this.repository.write(async (tx) => {
+      const row = await this.repository.operation(tx, userId, id);
+      if (row.deletedAt) return;
+      if (row.version !== version) conflict();
+      await this.repository.card(tx, userId, row.cardId, true);
+      if (row.targetCardId)
+        await this.repository.card(tx, userId, row.targetCardId, true);
+      if (
+        row.kind === BankOperationKind.Expense &&
+        (await tx.bankCardOperation.findFirst({
+          where: { userId, originalExpenseId: id, deletedAt: null },
+        }))
+      )
+        conflict(BankErrorCode.DependentRefunds);
+      if (row.originalExpenseId) {
+        const source = await this.repository.operation(
+          tx,
+          userId,
+          row.originalExpenseId,
+        );
+        if (
+          (
+            await tx.bankCardOperation.updateMany({
+              where: { id: source.id, userId, version: source.version },
+              data: { version: { increment: 1 } },
+            })
+          ).count !== 1
+        )
+          conflict();
+      }
+      if (
+        (
+          await tx.bankCardOperation.updateMany({
+            where: { id, userId, version, deletedAt: null },
+            data: { deletedAt: new Date(), version: { increment: 1 } },
+          })
+        ).count !== 1
+      )
+        conflict();
+    });
+  }
+  history(
+    userId: string,
+    id: string,
+    query: BankOperationsQueryDto | BankPageQueryDto,
+    expenses = false,
+  ) {
+    const period = expenses
+      ? undefined
+      : periodBounds(query as BankOperationsQueryDto);
+    return this.prisma.$transaction(async (tx) => {
+      await this.repository.card(tx, userId, id);
+      const page = query.page ?? 1,
+        limit = query.limit ?? DEFAULT_BANK_PAGE_SIZE;
+      const where: Prisma.BankCardOperationWhereInput = {
+        userId,
+        deletedAt: null,
+        OR: [{ cardId: id }, { targetCardId: id }],
+        ...(period
+          ? { date: { gte: period.from, lte: period.to } }
+          : { kind: BankOperationKind.Expense }),
+      };
+      const total = await tx.bankCardOperation.count({ where });
+      const rows = await tx.bankCardOperation.findMany({
+        where,
+        orderBy: [{ date: 'desc' }, { createdAt: 'desc' }, { id: 'desc' }],
+        skip: (page - 1) * limit,
+        take: limit,
+      });
+      return {
+        items: await Promise.all(
+          rows.map((row) => this.operationView(tx, row)),
+        ),
+        total,
+        page,
+        hasNext: page * limit < total,
+      };
+    });
+  }
+}

src/modules/banking/bank-cards/application/expense-categories.service.ts

@@ -0,0 +1,73 @@
+import { MAX_CATEGORY_NAME_LENGTH } from '../domain/bank-card-limits';
+import { Injectable } from '@nestjs/common';
+import { randomUUID } from 'node:crypto';
+import { PrismaService } from '../../../../prisma/prisma.service';
+
+import { conflict, missing, name } from './bank-card-input';
+import { BankCardsRepository } from '../infrastructure/bank-cards.repository';
+@Injectable()
+export class ExpenseCategoriesService {
+  constructor(
+    private readonly prisma: PrismaService,
+    private readonly repository: BankCardsRepository,
+  ) {}
+  async categories(userId: string) {
+    return (
+      await this.prisma.expenseCategory.findMany({
+        where: { userId },
+        orderBy: [{ name: 'asc' }, { id: 'asc' }],
+      })
+    ).map(({ id, name, seedKey, version }) => ({
+      id,
+      name,
+      isDefault: seedKey === 'other',
+      version,
+    }));
+  }
+  createCategory(userId: string, value: string) {
+    const label = name(value, MAX_CATEGORY_NAME_LENGTH);
+    return this.repository.write(async (tx) => {
+      await this.repository.seed(tx, userId);
+      const row = await tx.expenseCategory.create({
+        data: {
+          id: randomUUID(),
+          userId,
+          name: label,
+          nameKey: label.toLocaleLowerCase('ru-RU'),
+        },
+      });
+      return {
+        id: row.id,
+        name: row.name,
+        isDefault: false,
+        version: row.version,
+      };
+    });
+  }
+  updateCategory(userId: string, id: string, value: string, version: number) {
+    const label = name(value, MAX_CATEGORY_NAME_LENGTH);
+    return this.repository.write(async (tx) => {
+      const row = await tx.expenseCategory.findFirst({ where: { id, userId } });
+      if (!row) missing();
+      if (
+        (
+          await tx.expenseCategory.updateMany({
+            where: { id, userId, version },
+            data: {
+              name: label,
+              nameKey: label.toLocaleLowerCase('ru-RU'),
+              version: { increment: 1 },
+            },
+          })
+        ).count !== 1
+      )
+        conflict();
+      return {
+        id,
+        name: label,
+        isDefault: row.seedKey === 'other',
+        version: version + 1,
+      };
+    });
+  }
+}

src/modules/banking/bank-cards/application/get-bank-summary.use-case.spec.ts

@@ -0,0 +1,50 @@
+jest.mock('../../../../prisma/prisma.service', () => ({
+  PrismaService: class {},
+}));
+jest.mock('../../../../../generated/prisma/client', () => ({ Prisma: {} }));
+import { PrismaService } from '../../../../prisma/prisma.service';
+import { BankCardsRepository } from '../infrastructure/bank-cards.repository';
+import { GetBankSummaryUseCase } from './get-bank-summary.use-case';
+
+describe('bank card summary categories', () => {
+  it('resolves category names and rejects an inconsistent category reference', async () => {
+    const categories = jest
+      .fn()
+      .mockResolvedValue([{ id: 'food', name: 'Продукты' }]);
+    const tx = {
+      bankCardOperation: {
+        findMany: jest.fn().mockResolvedValue([
+          {
+            kind: 'expense',
+            categoryId: 'food',
+            amountKopecks: 123n,
+            date: '2026-09-13',
+            originalExpense: null,
+          },
+        ]),
+      },
+      expenseCategory: { findMany: categories },
+    };
+    const service = new GetBankSummaryUseCase(
+      new BankCardsRepository({
+        $transaction: (run: (client: typeof tx) => unknown) => run(tx),
+      } as unknown as PrismaService),
+    );
+
+    await expect(
+      service.execute('user', { month: '2026-09' }),
+    ).resolves.toMatchObject({
+      categories: [
+        {
+          categoryId: 'food',
+          categoryName: 'Продукты',
+          net: { value: '1.23' },
+        },
+      ],
+    });
+    categories.mockResolvedValue([]);
+    await expect(service.execute('user', { month: '2026-09' })).rejects.toThrow(
+      'Bank operation category is missing',
+    );
+  });
+});

src/modules/banking/bank-cards/application/get-bank-summary.use-case.ts

@@ -0,0 +1,40 @@
+import { Injectable } from '@nestjs/common';
+import { BankSummaryQueryDto } from '../presentation/bank-card.dto';
+import { bankSummary } from '../domain/bank-card.calculations';
+import { rubMoney } from '../domain/rub-money';
+
+import { periodBounds } from './bank-card-input';
+import { BankCardsRepository } from '../infrastructure/bank-cards.repository';
+@Injectable()
+export class GetBankSummaryUseCase {
+  constructor(private readonly repository: BankCardsRepository) {}
+
+  async execute(userId: string, query: BankSummaryQueryDto) {
+    const period = periodBounds(query);
+    const { operations, categories } = await this.repository.summaryData(
+      userId,
+      period,
+      query.cardId,
+    );
+    const totals = bankSummary(period, operations);
+    return {
+      month: query.month,
+      ...period,
+      cardId: query.cardId ?? null,
+      expenses: rubMoney(totals.expenses),
+      refunds: rubMoney(totals.refunds),
+      net: rubMoney(totals.net),
+      categories: totals.categories.map((row) => {
+        const category = categories.find((c) => c.id === row.categoryId);
+        if (!category) throw new Error('Bank operation category is missing');
+        return {
+          categoryId: row.categoryId,
+          categoryName: category.name,
+          expenses: rubMoney(row.expenses),
+          refunds: rubMoney(row.refunds),
+          net: rubMoney(row.net),
+        };
+      }),
+    };
+  }
+}

src/modules/banking/bank-cards/bank-cards.module.ts

@@ -0,0 +1,20 @@
+import { Module } from '@nestjs/common';
+import { AuthModule } from '../../auth/auth.module';
+import { BankCardsController } from './presentation/bank-cards.controller';
+import { BankCardsRepository } from './infrastructure/bank-cards.repository';
+import { BankCardsService } from './application/bank-cards.service';
+import { BankOperationsService } from './application/bank-operations.service';
+import { ExpenseCategoriesService } from './application/expense-categories.service';
+import { GetBankSummaryUseCase } from './application/get-bank-summary.use-case';
+@Module({
+  imports: [AuthModule],
+  controllers: [BankCardsController],
+  providers: [
+    GetBankSummaryUseCase,
+    ExpenseCategoriesService,
+    BankOperationsService,
+    BankCardsRepository,
+    BankCardsService,
+  ],
+})
+export class BankCardsModule {}

src/modules/banking/bank-cards/domain/bank-card-limits.ts

@@ -0,0 +1,3 @@
+export const MAX_CARD_NAME_LENGTH = 100;
+export const MAX_CATEGORY_NAME_LENGTH = 80;
+export const MAX_OPERATION_DESCRIPTION_LENGTH = 500;

src/modules/banking/bank-cards/domain/bank-card.calculations.ts

@@ -1,3 +1,6 @@
+import { BankOperationKind } from './bank-operation-kind';
+
+const ISO_MONTH_LENGTH = 7;
 export function moscowToday(now = new Date()): string {
   return new Intl.DateTimeFormat('en-CA', {
     timeZone: 'Europe/Moscow',
@@ -30,12 +33,21 @@ export function bankBalance(
   let balance = opening;
   for (const operation of operations) {
     if (operation.cardId === cardId) {
-      if (operation.kind === 'expense' || operation.kind === 'transfer')
+      if (
+        operation.kind === BankOperationKind.Expense ||
+        operation.kind === BankOperationKind.Transfer
+      )
         balance -= operation.amountKopecks;
-      else if (operation.kind === 'topup' || operation.kind === 'refund')
+      else if (
+        operation.kind === BankOperationKind.Topup ||
+        operation.kind === BankOperationKind.Refund
+      )
         balance += operation.amountKopecks;
     }
-    if (operation.kind === 'transfer' && operation.targetCardId === cardId)
+    if (
+      operation.kind === BankOperationKind.Transfer &&
+      operation.targetCardId === cardId
+    )
       balance += operation.amountKopecks;
   }
   return balance;
@@ -60,13 +72,23 @@ export function bankSummary(
   for (const operation of operations) {
     if (
       typeof period === 'string'
-        ? operation.date.slice(0, 7) !== period
+        ? operation.date.slice(0, ISO_MONTH_LENGTH) !== period
         : operation.date < period.from || operation.date > period.to
     )
       continue;
-    if (operation.kind !== 'expense' && operation.kind !== 'refund') continue;
-    const expense = operation.kind === 'expense' ? operation.amountKopecks : 0n;
-    const refund = operation.kind === 'refund' ? operation.amountKopecks : 0n;
+    if (
+      operation.kind !== BankOperationKind.Expense &&
+      operation.kind !== BankOperationKind.Refund
+    )
+      continue;
+    const expense =
+      operation.kind === BankOperationKind.Expense
+        ? operation.amountKopecks
+        : 0n;
+    const refund =
+      operation.kind === BankOperationKind.Refund
+        ? operation.amountKopecks
+        : 0n;
     expenses += expense;
     refunds += refund;
     if (operation.categoryId !== null) {

src/modules/banking/bank-cards/domain/bank-operation-kind.ts

@@ -0,0 +1,8 @@
+export const BankOperationKind = {
+  Expense: 'expense',
+  Topup: 'topup',
+  Transfer: 'transfer',
+  Refund: 'refund',
+} as const;
+export type BankOperationKind =
+  (typeof BankOperationKind)[keyof typeof BankOperationKind];

src/modules/banking/bank-cards/domain/rub-money.ts

@@ -1,7 +1,10 @@
-import { decimalFromString, formatDecimal } from './decimal';
-import { MoneyDto } from './money.dto';
+import { decimalFromString, formatDecimal } from '../../../../common/decimal';
+import type { Money } from '../../../../common/money.types';
 
-export function parseRubMoney(money: MoneyDto, positive = false): bigint {
+const MIN_KOPECKS = -9_223_372_036_854_775_808n;
+const MAX_KOPECKS = 9_223_372_036_854_775_807n;
+
+export function parseRubMoney(money: Money, positive = false): bigint {
   if (
     money?.currency !== 'RUB' ||
     typeof money.value !== 'string' ||
@@ -12,14 +15,14 @@ export function parseRubMoney(money: MoneyDto, positive = false): bigint {
   if (amount.scale > 2)
     throw new RangeError('RUB money supports at most two decimal places');
   const kopecks = amount.value * 10n ** BigInt(2 - amount.scale);
-  if (kopecks < -(2n ** 63n) || kopecks > 2n ** 63n - 1n)
+  if (kopecks < MIN_KOPECKS || kopecks > MAX_KOPECKS)
     throw new RangeError('RUB money is outside the signed 64-bit range');
   if (positive && kopecks <= 0n)
     throw new RangeError('Operation amount must be positive');
   return kopecks;
 }
 
-export function rubMoney(kopecks: bigint): MoneyDto {
+export function rubMoney(kopecks: bigint): Money {
   return {
     currency: 'RUB',
     value: formatDecimal({ value: kopecks, scale: 2 }),

src/modules/banking/bank-cards/infrastructure/bank-cards.repository.ts

@@ -0,0 +1,114 @@
+import { BankOperationKind } from '../domain/bank-operation-kind';
+import { Injectable } from '@nestjs/common';
+import { randomUUID } from 'node:crypto';
+import { Prisma } from '../../../../../generated/prisma/client';
+import { PrismaService } from '../../../../prisma/prisma.service';
+
+import {
+  BankErrorCode,
+  conflict,
+  missing,
+} from '../application/bank-card-input';
+type Tx = Prisma.TransactionClient;
+const TRANSACTION_MAX_WAIT_MS = 10_000;
+const TRANSACTION_TIMEOUT_MS = 15_000;
+const MAX_WRITE_RETRY_COUNT = 2;
+const seeds = [
+  'Продукты',
+  'Кафе',
+  'Такси',
+  'Транспорт',
+  'Жильё',
+  'Здоровье',
+  'Покупки',
+  'Развлечения',
+  'Другое',
+];
+@Injectable()
+export class BankCardsRepository {
+  constructor(private readonly prisma: PrismaService) {}
+  async write<T>(run: (tx: Tx) => Promise<T>): Promise<T> {
+    for (let attempt = 0; ; attempt++) {
+      try {
+        return await this.prisma.$transaction(run, {
+          maxWait: TRANSACTION_MAX_WAIT_MS,
+          timeout: TRANSACTION_TIMEOUT_MS,
+        });
+      } catch (error) {
+        const code =
+          error instanceof Prisma.PrismaClientKnownRequestError
+            ? error.code
+            : '';
+        const busy =
+          code === 'P2034' ||
+          code === 'P2028' ||
+          (error instanceof Error &&
+            /SQLITE_BUSY|database is locked/.test(error.message));
+        if ((busy || code === 'P2002') && attempt < MAX_WRITE_RETRY_COUNT)
+          continue;
+        if (busy) conflict(BankErrorCode.WriteConflict);
+        if (code === 'P2002') conflict(BankErrorCode.DuplicateCategory);
+        throw error;
+      }
+    }
+  }
+  async card(tx: Tx, userId: string, id: string, active = false) {
+    const card = await tx.bankCard.findFirst({ where: { id, userId } });
+    if (!card) return missing();
+    if (active && card.archivedAt) conflict(BankErrorCode.CardArchived);
+    return card;
+  }
+  async operation(tx: Tx, userId: string, id: string) {
+    const row = await tx.bankCardOperation.findFirst({ where: { id, userId } });
+    if (!row) return missing();
+    return row;
+  }
+  async seed(tx: Tx, userId: string) {
+    for (const [index, label] of seeds.entries()) {
+      const seedKey = index === seeds.length - 1 ? 'other' : String(index);
+      if (
+        !(await tx.expenseCategory.findUnique({
+          where: { userId_seedKey: { userId, seedKey } },
+        }))
+      )
+        await tx.expenseCategory.create({
+          data: {
+            id: randomUUID(),
+            userId,
+            seedKey,
+            name: label,
+            nameKey: label.toLocaleLowerCase('ru-RU'),
+          },
+        });
+    }
+  }
+  summaryData(
+    userId: string,
+    period: { from: string; to: string },
+    cardId?: string,
+  ) {
+    return this.prisma.$transaction(async (tx) => {
+      if (cardId) await this.card(tx, userId, cardId);
+      const rows = await tx.bankCardOperation.findMany({
+        where: {
+          userId,
+          deletedAt: null,
+          date: { gte: period.from, lte: period.to },
+          kind: { in: [BankOperationKind.Expense, BankOperationKind.Refund] },
+          ...(cardId ? { cardId } : {}),
+        },
+        include: { originalExpense: { select: { categoryId: true } } },
+      });
+      const categories = await tx.expenseCategory.findMany({
+        where: { userId },
+      });
+      return {
+        operations: rows.map((row) => ({
+          ...row,
+          categoryId: row.originalExpense?.categoryId ?? row.categoryId,
+        })),
+        categories,
+      };
+    });
+  }
+}

src/modules/banking/bank-cards/presentation/bank-card.dto.ts

@@ -1,8 +1,14 @@
+import {
+  MAX_CARD_NAME_LENGTH,
+  MAX_CATEGORY_NAME_LENGTH,
+  MAX_OPERATION_DESCRIPTION_LENGTH,
+} from '../domain/bank-card-limits';
+import { BankOperationKind } from '../domain/bank-operation-kind';
 import {
   ApiProperty,
   ApiPropertyOptional,
-  OmitType,
   IntersectionType,
+  OmitType,
   PartialType,
 } from '@nestjs/swagger';
 import { Transform, Type } from 'class-transformer';
@@ -22,38 +28,39 @@ import {
   ValidateIf,
   ValidateNested,
 } from 'class-validator';
-import { MoneyDto } from '../common/money.dto';
+import { MoneyDto } from '../../../../common/money.dto';
+
+export const DEFAULT_BANK_PAGE_SIZE = 50;
+const MAX_BANK_PAGE_SIZE = 100;
 
 const trim = ({ value }: { value: unknown }) =>
   typeof value === 'string' ? value.trim() : value;
 export const bankPaymentSystems = ['mir', 'visa', 'mastercard'] as const;
-export const bankOperationKinds = [
-  'expense',
-  'topup',
-  'transfer',
-  'refund',
-] as const;
-export type BankOperationKind = (typeof bankOperationKinds)[number];
+const bankOperationKinds = Object.values(BankOperationKind);
 export class RubMoneyInputDto {
-  @ApiProperty({ enum: ['RUB'] }) @IsIn(['RUB']) currency: string;
+  @ApiProperty({ enum: ['RUB'] }) @IsIn(['RUB']) declare currency: string;
   @ApiProperty({ pattern: '^-?[0-9]+(\\.[0-9]{1,2})?$' })
   @IsString()
   @Matches(/^-?\d+(\.\d{1,2})?$/)
-  value: string;
+  declare value: string;
 }
 export class CreateBankCardDto {
-  @ApiProperty({ format: 'uuid' }) @IsUUID() id: string;
-  @ApiProperty({ minLength: 1, maxLength: 100 })
+  @ApiProperty({ format: 'uuid' }) @IsUUID() declare id: string;
+  @ApiProperty({ minLength: 1, maxLength: MAX_CARD_NAME_LENGTH })
   @Transform(trim)
   @IsString()
   @MinLength(1)
-  @MaxLength(100)
-  name: string;
-  @ApiPropertyOptional({ type: String, nullable: true, maxLength: 100 })
+  @MaxLength(MAX_CARD_NAME_LENGTH)
+  declare name: string;
+  @ApiPropertyOptional({
+    type: String,
+    nullable: true,
+    maxLength: MAX_CARD_NAME_LENGTH,
+  })
   @IsOptional()
   @Transform(trim)
   @IsString()
-  @MaxLength(100)
+  @MaxLength(MAX_CARD_NAME_LENGTH)
   bankName?: string | null;
   @ApiPropertyOptional({ type: String, nullable: true, pattern: '^[0-9]{4}$' })
   @IsOptional()
@@ -67,39 +74,39 @@ export class CreateBankCardDto {
   @IsDefined()
   @ValidateNested()
   @Type(() => RubMoneyInputDto)
-  openingBalance: MoneyDto;
+  declare openingBalance: MoneyDto;
   @ApiProperty({ format: 'date' })
   @IsString()
   @Matches(/^\d{4}-\d{2}-\d{2}$/)
-  openingDate: string;
+  declare openingDate: string;
 }
 export class UpdateBankCardDto extends PartialType(
   OmitType(CreateBankCardDto, ['id'] as const),
   { skipNullProperties: false },
 ) {
-  @ApiProperty({ minimum: 1 }) @IsInt() @Min(1) version: number;
+  @ApiProperty({ minimum: 1 }) @IsInt() @Min(1) declare version: number;
   @ApiPropertyOptional()
   @ValidateIf((_object, value: unknown) => value !== undefined)
   @IsBoolean()
   archived?: boolean;
 }
 export class CategoryNameDto {
-  @ApiProperty({ minLength: 1, maxLength: 80 })
+  @ApiProperty({ minLength: 1, maxLength: MAX_CATEGORY_NAME_LENGTH })
   @Transform(trim)
   @IsString()
   @MinLength(1)
-  @MaxLength(80)
-  name: string;
+  @MaxLength(MAX_CATEGORY_NAME_LENGTH)
+  declare name: string;
 }
 export class UpdateExpenseCategoryDto extends CategoryNameDto {
-  @ApiProperty({ minimum: 1 }) @IsInt() @Min(1) version: number;
+  @ApiProperty({ minimum: 1 }) @IsInt() @Min(1) declare version: number;
 }
 export class CreateBankOperationDto {
-  @ApiProperty({ format: 'uuid' }) @IsUUID() id: string;
+  @ApiProperty({ format: 'uuid' }) @IsUUID() declare id: string;
   @ApiProperty({ enum: bankOperationKinds })
   @IsIn(bankOperationKinds)
-  kind: BankOperationKind;
-  @ApiProperty({ format: 'uuid' }) @IsUUID() cardId: string;
+  declare kind: BankOperationKind;
+  @ApiProperty({ format: 'uuid' }) @IsUUID() declare cardId: string;
   @ApiPropertyOptional({ format: 'uuid' })
   @ValidateIf((_object, value: unknown) => value !== undefined)
   @IsUUID()
@@ -116,22 +123,22 @@ export class CreateBankOperationDto {
   @IsDefined()
   @ValidateNested()
   @Type(() => RubMoneyInputDto)
-  amount: MoneyDto;
+  declare amount: MoneyDto;
   @ApiProperty({ format: 'date' })
   @IsString()
   @Matches(/^\d{4}-\d{2}-\d{2}$/)
-  date: string;
-  @ApiPropertyOptional({ maxLength: 500 })
+  declare date: string;
+  @ApiPropertyOptional({ maxLength: MAX_OPERATION_DESCRIPTION_LENGTH })
   @ValidateIf((_object, value: unknown) => value !== undefined)
   @IsString()
-  @MaxLength(500)
+  @MaxLength(MAX_OPERATION_DESCRIPTION_LENGTH)
   description?: string;
 }
 export class UpdateBankOperationDto extends PartialType(
   OmitType(CreateBankOperationDto, ['id'] as const),
   { skipNullProperties: false },
 ) {
-  @ApiProperty({ minimum: 1 }) @IsInt() @Min(1) version: number;
+  @ApiProperty({ minimum: 1 }) @IsInt() @Min(1) declare version: number;
 }
 export class BankCardsQueryDto {
   @ApiPropertyOptional({ enum: ['true', 'false'] })
@@ -146,12 +153,16 @@ export class BankPageQueryDto {
   @IsInt()
   @Min(1)
   page?: number;
-  @ApiPropertyOptional({ minimum: 1, maximum: 100, default: 50 })
+  @ApiPropertyOptional({
+    minimum: 1,
+    maximum: MAX_BANK_PAGE_SIZE,
+    default: DEFAULT_BANK_PAGE_SIZE,
+  })
   @IsOptional()
   @Type(() => Number)
   @IsInt()
   @Min(1)
-  @Max(100)
+  @Max(MAX_BANK_PAGE_SIZE)
   limit?: number;
 }
 export class BankPeriodQueryDto {
@@ -192,68 +203,76 @@ export class BankVersionQueryDto {
   @Type(() => Number)
   @IsInt()
   @Min(1)
-  version: number;
+  declare version: number;
 }
 export class ExpenseCategoryDto {
-  @ApiProperty({ type: String }) id: string;
-  @ApiProperty({ type: String }) name: string;
-  @ApiProperty({ type: Boolean }) isDefault: boolean;
-  @ApiProperty({ type: Number }) version: number;
+  @ApiProperty({ type: String }) declare id: string;
+  @ApiProperty({ type: String }) declare name: string;
+  @ApiProperty({ type: Boolean }) declare isDefault: boolean;
+  @ApiProperty({ type: Number }) declare version: number;
 }
 export class BankCardDto {
-  @ApiProperty({ type: String }) id: string;
-  @ApiProperty({ type: String }) name: string;
-  @ApiProperty({ type: String, nullable: true }) bankName: string | null;
-  @ApiProperty({ type: String, nullable: true }) lastFour: string | null;
-  @ApiProperty({ enum: bankPaymentSystems, nullable: true }) paymentSystem:
+  @ApiProperty({ type: String }) declare id: string;
+  @ApiProperty({ type: String }) declare name: string;
+  @ApiProperty({ type: String, nullable: true }) declare bankName:
     string | null;
-  @ApiProperty({ type: MoneyDto }) openingBalance: MoneyDto;
-  @ApiProperty({ type: String }) openingDate: string;
-  @ApiProperty({ type: MoneyDto }) balance: MoneyDto;
-  @ApiProperty({ type: String, nullable: true }) archivedAt: string | null;
-  @ApiProperty({ type: Number }) version: number;
+  @ApiProperty({ type: String, nullable: true }) declare lastFour:
+    string | null;
+  @ApiProperty({ enum: bankPaymentSystems, nullable: true })
+  declare paymentSystem: string | null;
+  @ApiProperty({ type: MoneyDto }) declare openingBalance: MoneyDto;
+  @ApiProperty({ type: String }) declare openingDate: string;
+  @ApiProperty({ type: MoneyDto }) declare balance: MoneyDto;
+  @ApiProperty({ type: String, nullable: true }) declare archivedAt:
+    string | null;
+  @ApiProperty({ type: Number }) declare version: number;
 }
 export class BankOperationDto {
-  @ApiProperty({ type: String }) id: string;
-  @ApiProperty({ enum: bankOperationKinds }) kind: BankOperationKind;
-  @ApiProperty({ type: String }) cardId: string;
-  @ApiProperty({ type: String }) cardName: string;
-  @ApiProperty({ type: String, nullable: true }) targetCardId: string | null;
-  @ApiProperty({ type: String, nullable: true }) targetCardName: string | null;
-  @ApiProperty({ type: String, nullable: true }) categoryId: string | null;
-  @ApiProperty({ type: String, nullable: true }) categoryName: string | null;
-  @ApiProperty({ type: String, nullable: true }) originalExpenseId:
+  @ApiProperty({ type: String }) declare id: string;
+  @ApiProperty({ enum: bankOperationKinds }) declare kind: BankOperationKind;
+  @ApiProperty({ type: String }) declare cardId: string;
+  @ApiProperty({ type: String }) declare cardName: string;
+  @ApiProperty({ type: String, nullable: true }) declare targetCardId:
     string | null;
-  @ApiProperty({ type: MoneyDto }) amount: MoneyDto;
+  @ApiProperty({ type: String, nullable: true }) declare targetCardName:
+    string | null;
+  @ApiProperty({ type: String, nullable: true }) declare categoryId:
+    string | null;
+  @ApiProperty({ type: String, nullable: true }) declare categoryName:
+    string | null;
+  @ApiProperty({ type: String, nullable: true }) declare originalExpenseId:
+    string | null;
+  @ApiProperty({ type: MoneyDto }) declare amount: MoneyDto;
   @ApiProperty({ type: MoneyDto, nullable: true })
-  availableRefund: MoneyDto | null;
-  @ApiProperty({ type: String }) date: string;
-  @ApiProperty({ type: String, nullable: true }) description: string | null;
-  @ApiProperty({ type: Number }) version: number;
-  @ApiProperty({ type: String }) createdAt: string;
+  declare availableRefund: MoneyDto | null;
+  @ApiProperty({ type: String }) declare date: string;
+  @ApiProperty({ type: String, nullable: true }) declare description:
+    string | null;
+  @ApiProperty({ type: Number }) declare version: number;
+  @ApiProperty({ type: String }) declare createdAt: string;
 }
 export class BankOperationsPageDto {
   @ApiProperty({ type: BankOperationDto, isArray: true })
-  items: BankOperationDto[];
-  @ApiProperty({ type: Number }) page: number;
-  @ApiProperty({ type: Number }) total: number;
-  @ApiProperty({ type: Boolean }) hasNext: boolean;
+  declare items: BankOperationDto[];
+  @ApiProperty({ type: Number }) declare page: number;
+  @ApiProperty({ type: Number }) declare total: number;
+  @ApiProperty({ type: Boolean }) declare hasNext: boolean;
 }
 export class BankSummaryCategoryDto {
-  @ApiProperty({ type: String }) categoryId: string;
-  @ApiProperty({ type: String }) categoryName: string;
-  @ApiProperty({ type: MoneyDto }) expenses: MoneyDto;
-  @ApiProperty({ type: MoneyDto }) refunds: MoneyDto;
-  @ApiProperty({ type: MoneyDto }) net: MoneyDto;
+  @ApiProperty({ type: String }) declare categoryId: string;
+  @ApiProperty({ type: String }) declare categoryName: string;
+  @ApiProperty({ type: MoneyDto }) declare expenses: MoneyDto;
+  @ApiProperty({ type: MoneyDto }) declare refunds: MoneyDto;
+  @ApiProperty({ type: MoneyDto }) declare net: MoneyDto;
 }
 export class BankSummaryDto {
   @ApiPropertyOptional({ type: String }) month?: string;
   @ApiPropertyOptional({ format: 'date' }) from?: string;
   @ApiPropertyOptional({ format: 'date' }) to?: string;
-  @ApiProperty({ type: String, nullable: true }) cardId: string | null;
-  @ApiProperty({ type: MoneyDto }) expenses: MoneyDto;
-  @ApiProperty({ type: MoneyDto }) refunds: MoneyDto;
-  @ApiProperty({ type: MoneyDto }) net: MoneyDto;
+  @ApiProperty({ type: String, nullable: true }) declare cardId: string | null;
+  @ApiProperty({ type: MoneyDto }) declare expenses: MoneyDto;
+  @ApiProperty({ type: MoneyDto }) declare refunds: MoneyDto;
+  @ApiProperty({ type: MoneyDto }) declare net: MoneyDto;
   @ApiProperty({ type: BankSummaryCategoryDto, isArray: true })
-  categories: BankSummaryCategoryDto[];
+  declare categories: BankSummaryCategoryDto[];
 }

src/modules/banking/bank-cards/presentation/bank-cards.controller.ts

@@ -4,6 +4,7 @@ import {
   Delete,
   Get,
   HttpCode,
+  HttpStatus,
   Param,
   Patch,
   Post,
@@ -16,17 +17,16 @@ import {
   ApiCreatedResponse,
   ApiNoContentResponse,
   ApiOkResponse,
-  ApiTags,
   ApiResponse,
+  ApiTags,
   getSchemaPath,
 } from '@nestjs/swagger';
 import type { Request } from 'express';
-import { AccessPayload } from '../auth/auth.types';
-import { JwtAuthGuard } from '../auth/jwt-auth.guard';
 import {
   ApiProblemResponses,
   ProblemDetailsDto,
-} from '../common/decorators/api-safe-error-response.decorator';
+} from '../../../../common/decorators/api-safe-error-response.decorator';
+import { AccessPayload, JwtAuthGuard } from '../../../auth/auth.api';
 import {
   BankCardDto,
   BankCardsQueryDto,
@@ -45,7 +45,10 @@ import {
   UpdateBankOperationDto,
   UpdateExpenseCategoryDto,
 } from './bank-card.dto';
-import { BankCardsService } from './bank-cards.service';
+import { BankCardsService } from '../application/bank-cards.service';
+import { BankOperationsService } from '../application/bank-operations.service';
+import { ExpenseCategoriesService } from '../application/expense-categories.service';
+import { GetBankSummaryUseCase } from '../application/get-bank-summary.use-case';
 type AuthRequest = Request & { user: AccessPayload };
 @ApiResponse({
   status: 409,
@@ -73,7 +76,12 @@ type AuthRequest = Request & { user: AccessPayload };
 @UseGuards(JwtAuthGuard)
 @Controller('bank-cards')
 export class BankCardsController {
-  constructor(private readonly cards: BankCardsService) {}
+  constructor(
+    private readonly cards: BankCardsService,
+    private readonly operations: BankOperationsService,
+    private readonly expenseCategories: ExpenseCategoriesService,
+    private readonly bankSummary: GetBankSummaryUseCase,
+  ) {}
   @Get()
   @ApiOkResponse({ type: BankCardDto, isArray: true })
   list(@Req() req: AuthRequest, @Query() query: BankCardsQueryDto) {
@@ -87,12 +95,12 @@ export class BankCardsController {
   @Get('categories')
   @ApiOkResponse({ type: ExpenseCategoryDto, isArray: true })
   categories(@Req() req: AuthRequest) {
-    return this.cards.categories(req.user.sub);
+    return this.expenseCategories.categories(req.user.sub);
   }
   @Post('categories')
   @ApiCreatedResponse({ type: ExpenseCategoryDto })
   createCategory(@Req() req: AuthRequest, @Body() body: CategoryNameDto) {
-    return this.cards.createCategory(req.user.sub, body.name);
+    return this.expenseCategories.createCategory(req.user.sub, body.name);
   }
   @Patch('categories/:id')
   @ApiOkResponse({ type: ExpenseCategoryDto })
@@ -101,12 +109,17 @@ export class BankCardsController {
     @Param('id') id: string,
     @Body() body: UpdateExpenseCategoryDto,
   ) {
-    return this.cards.updateCategory(req.user.sub, id, body.name, body.version);
+    return this.expenseCategories.updateCategory(
+      req.user.sub,
+      id,
+      body.name,
+      body.version,
+    );
   }
   @Get('summary')
   @ApiOkResponse({ type: BankSummaryDto })
   summary(@Req() req: AuthRequest, @Query() query: BankSummaryQueryDto) {
-    return this.cards.summary(req.user.sub, query);
+    return this.bankSummary.execute(req.user.sub, query);
   }
   @Post('operations')
   @ApiCreatedResponse({ type: BankOperationDto })
@@ -114,12 +127,12 @@ export class BankCardsController {
     @Req() req: AuthRequest,
     @Body() body: CreateBankOperationDto,
   ) {
-    return this.cards.createOperation(req.user.sub, body);
+    return this.operations.createOperation(req.user.sub, body);
   }
   @Get('operations/:id')
   @ApiOkResponse({ type: BankOperationDto })
   operation(@Req() req: AuthRequest, @Param('id') id: string) {
-    return this.cards.getOperation(req.user.sub, id);
+    return this.operations.getOperation(req.user.sub, id);
   }
   @Patch('operations/:id')
   @ApiOkResponse({ type: BankOperationDto })
@@ -128,17 +141,17 @@ export class BankCardsController {
     @Param('id') id: string,
     @Body() body: UpdateBankOperationDto,
   ) {
-    return this.cards.updateOperation(req.user.sub, id, body);
+    return this.operations.updateOperation(req.user.sub, id, body);
   }
   @Delete('operations/:id')
-  @HttpCode(204)
+  @HttpCode(HttpStatus.NO_CONTENT)
   @ApiNoContentResponse()
   deleteOperation(
     @Req() req: AuthRequest,
     @Param('id') id: string,
     @Query() query: BankVersionQueryDto,
   ) {
-    return this.cards.deleteOperation(req.user.sub, id, query.version);
+    return this.operations.deleteOperation(req.user.sub, id, query.version);
   }
   @Get(':id/operations')
   @ApiOkResponse({ type: BankOperationsPageDto })
@@ -147,7 +160,7 @@ export class BankCardsController {
     @Param('id') id: string,
     @Query() query: BankOperationsQueryDto,
   ) {
-    return this.cards.history(req.user.sub, id, query);
+    return this.operations.history(req.user.sub, id, query);
   }
   @Get(':id/expenses')
   @ApiOkResponse({ type: BankOperationsPageDto })
@@ -156,7 +169,7 @@ export class BankCardsController {
     @Param('id') id: string,
     @Query() query: BankPageQueryDto,
   ) {
-    return this.cards.history(req.user.sub, id, query, true);
+    return this.operations.history(req.user.sub, id, query, true);
   }
   @Get(':id')
   @ApiOkResponse({ type: BankCardDto })

src/modules/investments/account-reference.dto.ts

@@ -3,8 +3,8 @@ import { ApiProperty } from '@nestjs/swagger';
 /** Source account of a row in an all-accounts response. */
 export class AccountReferenceDto {
   @ApiProperty()
-  id: string;
+  declare id: string;
 
   @ApiProperty()
-  name: string;
+  declare name: string;
 }

src/modules/investments/all-accounts.spec.ts

@@ -3,14 +3,17 @@ import {
   ConflictException,
   ServiceUnavailableException,
 } from '@nestjs/common';
+import assert from 'node:assert/strict';
 
-jest.mock('./tbank-access.service', () => ({ TbankAccessService: class {} }));
+jest.mock('../../integrations/tbank/tbank-access.service', () => ({
+  TbankAccessService: class {},
+}));
 
-import { BrokerageOperationsService } from './brokerage-operations.service';
-import { IncomeAnalyticsService } from './income-analytics.service';
-import { PortfolioService } from './portfolio.service';
-import { UpcomingEventsService } from './upcoming-events.service';
-import type { TbankConnectionContext } from './tbank-access.service';
+import type { TbankConnectionContext } from '../../integrations/tbank/tbank-access.service';
+import { IncomeAnalyticsService } from './income/income-analytics.service';
+import { BrokerageOperationsService } from './operations/application/brokerage-operations.service';
+import { PortfolioService } from './portfolio/application/portfolio.service';
+import { UpcomingEventsService } from './upcoming-events/upcoming-events.service';
 
 function setup() {
   const context = {
@@ -130,6 +133,7 @@ describe('All accounts', () => {
       instrumentUid: 'common',
       limit: 1,
     });
+    assert.ok(first.nextCursor);
     expect(first.items).toHaveLength(1);
     expect(first.items[0].instrumentUid).toBe('common');
     expect(tbank.getOperationsByCursor).toHaveBeenCalledWith(
@@ -143,13 +147,13 @@ describe('All accounts', () => {
       operations.getAll('user', {
         instrumentUid: 'preferred',
         limit: 1,
-        cursor: first.nextCursor!,
+        cursor: first.nextCursor,
       }),
     ).rejects.toBeInstanceOf(BadRequestException);
     const second = await operations.getAll('user', {
       instrumentUid: 'common',
       limit: 1,
-      cursor: first.nextCursor!,
+      cursor: first.nextCursor,
     });
     expect(second.items[0].instrumentUid).toBe('common');
     expect(second.items[0].id).not.toBe(first.items[0].id);
@@ -246,17 +250,19 @@ describe('All accounts', () => {
       },
     );
     const first = await operations.getAll('user', query);
+    assert.ok(first.nextCursor);
     const second = await operations.getAll('user', {
       ...query,
-      cursor: first.nextCursor!,
+      cursor: first.nextCursor,
     });
     const repeated = await operations.getAll('user', {
       ...query,
-      cursor: first.nextCursor!,
+      cursor: first.nextCursor,
     });
+    assert.ok(second.nextCursor);
     const third = await operations.getAll('user', {
       ...query,
-      cursor: second.nextCursor!,
+      cursor: second.nextCursor,
     });
     expect(first.items.map((item) => [item.id, item.account?.id])).toEqual([
       ['same', 'a'],
@@ -312,7 +318,8 @@ describe('All accounts', () => {
       items: [operation('first', 8), operation('last', 4)],
     });
     const first = await operations.getAll('user', query);
-    const next = { ...query, cursor: first.nextCursor! };
+    assert.ok(first.nextCursor);
+    const next = { ...query, cursor: first.nextCursor };
     await expect(operations.getAll('other', next)).rejects.toBeInstanceOf(
       BadRequestException,
     );

src/modules/investments/brokerage-accounts/brokerage-account.dto.ts

@@ -1,31 +1,31 @@
 import { ApiProperty } from '@nestjs/swagger';
-import { MoneyDto } from '../common/money.dto';
+import { MoneyDto } from '../../../common/money.dto';
 
 export class PortfolioSummaryDto {
   @ApiProperty({ type: MoneyDto, isArray: true })
-  totalsByCurrency: MoneyDto[];
+  declare totalsByCurrency: MoneyDto[];
 
   @ApiProperty({
     type: 'integer',
     minimum: 0,
     description: 'Number of non-zero stock positions, not the number of units.',
   })
-  stockPositionCount: number;
+  declare stockPositionCount: number;
 
   @ApiProperty({
     type: 'integer',
     minimum: 0,
     description: 'Number of non-zero bond positions, not the number of units.',
   })
-  bondPositionCount: number;
+  declare bondPositionCount: number;
 }
 
 export class BrokerageAccountDto {
   @ApiProperty()
-  id: string;
+  declare id: string;
 
   @ApiProperty()
-  name: string;
+  declare name: string;
 
   @ApiProperty({
     enum: [
@@ -35,11 +35,11 @@ export class BrokerageAccountDto {
       'MONEY_MARKET_FUND',
     ],
   })
-  type:
+  declare type:
     'BROKERAGE' | 'INDIVIDUAL_INVESTMENT' | 'INVEST_BOX' | 'MONEY_MARKET_FUND';
 
   @ApiProperty({ type: String, nullable: true, format: 'date' })
-  openedOn: string | null;
+  declare openedOn: string | null;
 
   @ApiProperty({ type: PortfolioSummaryDto, nullable: true })
   portfolioSummary?: PortfolioSummaryDto | null;

src/modules/investments/brokerage-accounts/brokerage-accounts.controller.ts

@@ -1,9 +1,8 @@
 import { Controller, Get, Req, UseGuards } from '@nestjs/common';
 import { ApiBearerAuth, ApiOkResponse, ApiTags } from '@nestjs/swagger';
 import type { Request } from 'express';
-import { AccessPayload } from '../auth/auth.types';
-import { JwtAuthGuard } from '../auth/jwt-auth.guard';
-import { ApiProblemResponses } from '../common/decorators/api-safe-error-response.decorator';
+import { ApiProblemResponses } from '../../../common/decorators/api-safe-error-response.decorator';
+import { AccessPayload, JwtAuthGuard } from '../../auth/auth.api';
 import { BrokerageAccountDto } from './brokerage-account.dto';
 import { BrokerageAccountsService } from './brokerage-accounts.service';
 

src/modules/investments/brokerage-accounts/brokerage-accounts.module.ts

@@ -0,0 +1,12 @@
+import { Module } from '@nestjs/common';
+import { TbankModule } from '../../../integrations/tbank/tbank.module';
+import { AuthModule } from '../../auth/auth.module';
+import { BrokerageAccountsController } from './brokerage-accounts.controller';
+import { BrokerageAccountsService } from './brokerage-accounts.service';
+
+@Module({
+  imports: [AuthModule, TbankModule],
+  controllers: [BrokerageAccountsController],
+  providers: [BrokerageAccountsService],
+})
+export class BrokerageAccountsModule {}

src/modules/investments/brokerage-accounts/brokerage-accounts.service.spec.ts

@@ -4,13 +4,13 @@ import {
   ServiceUnavailableException,
 } from '@nestjs/common';
 
-jest.mock('../prisma/prisma.service', () => ({
+jest.mock('../../../prisma/prisma.service', () => ({
   PrismaService: class PrismaService {},
 }));
 
+import { TbankAccessService } from '../../../integrations/tbank/tbank-access.service';
+import { TbankTokenService } from '../../../integrations/tbank/tbank-token.service';
 import { BrokerageAccountsService } from './brokerage-accounts.service';
-import { TbankAccessService } from './tbank-access.service';
-import { TbankTokenService } from './tbank-token.service';
 
 describe('BrokerageAccountsService', () => {
   const encryptionKey = 'MDEyMzQ1Njc4OWFiY2RlZjAxMjM0NTY3ODlhYmNkZWY=';

src/modules/investments/brokerage-accounts/brokerage-accounts.service.ts

@@ -1,11 +1,12 @@
-import { Injectable } from '@nestjs/common';
-import { ServiceUnavailableException } from '@nestjs/common';
+import { Injectable, ServiceUnavailableException } from '@nestjs/common';
+import { isZero } from '../../../common/decimal';
+import {
+  TbankAccessService,
+  TbankClient,
+} from '../../../integrations/tbank/tbank.api';
+import { decimal } from '../../../integrations/tbank/decimal';
+import { totalsByCurrency } from '../portfolio/portfolio.api';
 import { BrokerageAccountDto } from './brokerage-account.dto';
-import { isZero } from '../common/decimal';
-import { decimal } from './decimal';
-import { totalsByCurrency } from './portfolio-totals';
-import { TbankAccessService } from './tbank-access.service';
-import { TbankClient } from './tbank.client';
 
 @Injectable()
 export class BrokerageAccountsService {

src/modules/investments/income/income-analytics.controller.ts

@@ -1,9 +1,8 @@
 import { Controller, Get, Param, Query, Req, UseGuards } from '@nestjs/common';
 import { ApiBearerAuth, ApiOkResponse, ApiTags } from '@nestjs/swagger';
 import type { Request } from 'express';
-import { AccessPayload } from '../auth/auth.types';
-import { JwtAuthGuard } from '../auth/jwt-auth.guard';
-import { ApiProblemResponses } from '../common/decorators/api-safe-error-response.decorator';
+import { ApiProblemResponses } from '../../../common/decorators/api-safe-error-response.decorator';
+import { AccessPayload, JwtAuthGuard } from '../../auth/auth.api';
 import {
   IncomeAnalyticsDto,
   IncomeAnalyticsQueryDto,

src/modules/investments/income/income-analytics.dto.ts

@@ -1,7 +1,7 @@
 import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
 import { IsOptional, Matches } from 'class-validator';
-import { BrokerageOperationDto } from './brokerage-operation.dto';
-import { MoneyDto } from '../common/money.dto';
+import { MoneyDto } from '../../../common/money.dto';
+import { BrokerageOperationDto } from '../operations/operations.api';
 
 const dateOnly = /^\d{4}-\d{2}-\d{2}$/;
 
@@ -19,123 +19,123 @@ export class IncomeAnalyticsQueryDto {
 
 export class IncomePeriodDto {
   @ApiProperty({ format: 'date' })
-  from: string;
+  declare from: string;
 
   @ApiProperty({ format: 'date' })
-  to: string;
+  declare to: string;
 }
 
 export class IncomeCurrencySummaryDto {
   @ApiProperty()
-  currency: string;
+  declare currency: string;
 
   @ApiProperty({ type: MoneyDto })
-  coupon: MoneyDto;
+  declare coupon: MoneyDto;
 
   @ApiProperty({ type: MoneyDto })
-  dividend: MoneyDto;
+  declare dividend: MoneyDto;
 
   @ApiProperty({ type: MoneyDto })
-  total: MoneyDto;
+  declare total: MoneyDto;
 }
 
 export class IncomeSummaryDto {
   @ApiProperty()
-  accountId: string;
+  declare accountId: string;
 
   @ApiProperty({ type: IncomePeriodDto })
-  period: IncomePeriodDto;
+  declare period: IncomePeriodDto;
 
   @ApiProperty({ type: IncomeCurrencySummaryDto, isArray: true })
-  totalsByCurrency: IncomeCurrencySummaryDto[];
+  declare totalsByCurrency: IncomeCurrencySummaryDto[];
 
   @ApiProperty({ format: 'date-time' })
-  calculatedAt: string;
+  declare calculatedAt: string;
 }
 
 export class IncomeComparisonCurrencyDto {
   @ApiProperty()
-  currency: string;
+  declare currency: string;
 
   @ApiProperty({ type: IncomeCurrencySummaryDto })
-  selected: IncomeCurrencySummaryDto;
+  declare selected: IncomeCurrencySummaryDto;
 
   @ApiProperty({ type: IncomeCurrencySummaryDto })
-  compared: IncomeCurrencySummaryDto;
+  declare compared: IncomeCurrencySummaryDto;
 
   @ApiProperty({ type: IncomeCurrencySummaryDto })
-  difference: IncomeCurrencySummaryDto;
+  declare difference: IncomeCurrencySummaryDto;
 }
 
 export class IncomeComparisonDto {
   @ApiProperty({ type: IncomePeriodDto })
-  period: IncomePeriodDto;
+  declare period: IncomePeriodDto;
 
   @ApiProperty({ type: IncomeComparisonCurrencyDto, isArray: true })
-  totalsByCurrency: IncomeComparisonCurrencyDto[];
+  declare totalsByCurrency: IncomeComparisonCurrencyDto[];
 }
 
 export class IncomeBucketDto {
   @ApiProperty({ type: IncomePeriodDto })
-  period: IncomePeriodDto;
+  declare period: IncomePeriodDto;
 
   @ApiProperty({ type: IncomeCurrencySummaryDto, isArray: true })
-  totalsByCurrency: IncomeCurrencySummaryDto[];
+  declare totalsByCurrency: IncomeCurrencySummaryDto[];
 }
 
 export class IncomeInstrumentDto {
   @ApiProperty()
-  key: string;
+  declare key: string;
 
   @ApiProperty({ type: String, nullable: true })
-  figi: string | null;
+  declare figi: string | null;
 
   @ApiProperty({ type: String, nullable: true })
-  instrumentUid: string | null;
+  declare instrumentUid: string | null;
 
   @ApiProperty({ type: String, nullable: true })
-  ticker: string | null;
+  declare ticker: string | null;
 
   @ApiProperty({ type: String, nullable: true })
-  instrumentType: string | null;
+  declare instrumentType: string | null;
 
   @ApiProperty()
-  displayName: string;
+  declare displayName: string;
 
   @ApiProperty({ type: MoneyDto })
-  coupon: MoneyDto;
+  declare coupon: MoneyDto;
 
   @ApiProperty({ type: MoneyDto })
-  dividend: MoneyDto;
+  declare dividend: MoneyDto;
 
   @ApiProperty({ type: MoneyDto })
-  total: MoneyDto;
+  declare total: MoneyDto;
 
   @ApiProperty()
-  receiptCount: number;
+  declare receiptCount: number;
 }
 
 export class IncomeAnalyticsEntryDto extends BrokerageOperationDto {
   @ApiProperty()
-  instrumentKey: string;
+  declare instrumentKey: string;
 }
 
 export class IncomeAnalyticsDto extends IncomeSummaryDto {
   @ApiProperty({ type: IncomeComparisonDto })
-  previous: IncomeComparisonDto;
+  declare previous: IncomeComparisonDto;
 
   @ApiProperty({ type: IncomeComparisonDto, nullable: true })
-  yearComparison: IncomeComparisonDto | null;
+  declare yearComparison: IncomeComparisonDto | null;
 
   @ApiProperty({ enum: ['day', 'week', 'month'] })
-  bucketGranularity: 'day' | 'week' | 'month';
+  declare bucketGranularity: 'day' | 'week' | 'month';
 
   @ApiProperty({ type: IncomeBucketDto, isArray: true })
-  buckets: IncomeBucketDto[];
+  declare buckets: IncomeBucketDto[];
 
   @ApiProperty({ type: IncomeInstrumentDto, isArray: true })
-  instruments: IncomeInstrumentDto[];
+  declare instruments: IncomeInstrumentDto[];
 
   @ApiProperty({ type: IncomeAnalyticsEntryDto, isArray: true })
-  entries: IncomeAnalyticsEntryDto[];
+  declare entries: IncomeAnalyticsEntryDto[];
 }

src/modules/investments/income/income-analytics.service.spec.ts

@@ -1,8 +1,8 @@
-jest.mock('./brokerage-operations.service', () => ({
+jest.mock('../operations/application/brokerage-operations.service', () => ({
   BrokerageOperationsService: class BrokerageOperationsService {},
 }));
 
-import { BrokerageOperationDto } from './brokerage-operation.dto';
+import { BrokerageOperationDto } from '../operations/presentation/brokerage-operation.dto';
 import { IncomeAnalyticsService } from './income-analytics.service';
 
 describe('IncomeAnalyticsService', () => {

src/modules/investments/income/income-analytics.service.ts

@@ -1,21 +1,17 @@
 import { Injectable } from '@nestjs/common';
-import { BrokerageOperationDto } from './brokerage-operation.dto';
-import { BrokerageOperationsService } from './brokerage-operations.service';
 import {
   add,
   compare,
   decimalFromString,
   formatDecimal,
   subtract,
-} from '../common/decimal';
-
+} from '../../../common/decimal';
+import { DateOnlyRange, moscowDate } from '../investment-calendar';
 import {
-  DateOnlyRange,
-  IncomeBucketGranularity,
-  moscowDate,
-  planIncomePeriod,
-  rangeBuckets,
-} from './income-period';
+  BrokerageOperationDto,
+  BrokerageOperationsService,
+} from '../operations/operations.api';
+
 import {
   IncomeAnalyticsDto,
   IncomeAnalyticsEntryDto,
@@ -24,6 +20,11 @@ import {
   IncomeInstrumentDto,
   IncomeSummaryDto,
 } from './income-analytics.dto';
+import {
+  IncomeBucketGranularity,
+  planIncomePeriod,
+  rangeBuckets,
+} from './income-period';
 
 type Total = {
   coupon: ReturnType<typeof decimalFromString>;

src/modules/investments/income/income-period.spec.ts

@@ -1,9 +1,6 @@
 import { BadRequestException } from '@nestjs/common';
-import {
-  dateOnlyBounds,
-  planIncomePeriod,
-  rangeBuckets,
-} from './income-period';
+import { dateOnlyBounds } from '../investment-calendar';
+import { planIncomePeriod, rangeBuckets } from './income-period';
 
 describe('income period planning', () => {
   afterEach(() => jest.useRealTimers());

src/modules/investments/income/income-period.ts

@@ -1,10 +1,20 @@
+import { MILLISECONDS_PER_DAY } from '../../../common/time';
 import { BadRequestException } from '@nestjs/common';
+import {
+  DateOnlyRange,
+  dateParts,
+  moscowDate,
+  utcDate,
+} from '../investment-calendar';
+
+const DAILY_BUCKET_MAX_DAYS = 45;
+const WEEKLY_BUCKET_MAX_DAYS = 180;
+const DAYS_PER_WEEK = 7;
+const ISO_MONTH_LENGTH = 7;
+const ISO_YEAR_LENGTH = 4;
 
-export type DateOnlyRange = { from: string; to: string };
 export type IncomeBucketGranularity = 'day' | 'week' | 'month';
 
-const moscow = 'Europe/Moscow';
-
 export function planIncomePeriod(
   from: string | undefined,
   to: string | undefined,
@@ -33,35 +43,14 @@ export function planIncomePeriod(
     previous,
     yearAgo: yearAgoRange,
     granularity:
-      rangeDays(selected) <= 45
+      rangeDays(selected) <= DAILY_BUCKET_MAX_DAYS
         ? 'day'
-        : rangeDays(selected) <= 180
+        : rangeDays(selected) <= WEEKLY_BUCKET_MAX_DAYS
           ? 'week'
           : 'month',
   };
 }
 
-export function moscowDate(value: Date): string {
-  const parts = new Intl.DateTimeFormat('en-CA', {
-    timeZone: moscow,
-    year: 'numeric',
-    month: '2-digit',
-    day: '2-digit',
-  }).formatToParts(value);
-  const get = (type: string) => parts.find((part) => part.type === type)?.value;
-  return `${get('year')}-${get('month')}-${get('day')}`;
-}
-
-export function dateOnlyBounds(range: DateOnlyRange): { from: Date; to: Date } {
-  const from = dateParts(range.from);
-  const end = dateParts(range.to);
-  const to = new Date(Date.UTC(end[0], end[1] - 1, end[2], 20, 59, 59, 999));
-  return {
-    from: new Date(Date.UTC(from[0], from[1] - 1, from[2], -3)),
-    to: to > new Date() ? new Date() : to,
-  };
-}
-
 export function rangeBuckets(
   range: DateOnlyRange,
   granularity: IncomeBucketGranularity,
@@ -71,11 +60,19 @@ export function rangeBuckets(
   const buckets: DateOnlyRange[] = [];
   let cursor =
     granularity === 'week'
-      ? addDays(range.from, -((utcDate(range.from).getUTCDay() + 6) % 7))
-      : `${range.from.slice(0, 7)}-01`;
+      ? addDays(
+          range.from,
+          -(
+            (utcDate(range.from).getUTCDay() + DAYS_PER_WEEK - 1) %
+            DAYS_PER_WEEK
+          ),
+        )
+      : `${range.from.slice(0, ISO_MONTH_LENGTH)}-01`;
   while (cursor <= range.to) {
     const end =
-      granularity === 'week' ? addDays(cursor, 6) : endOfMonth(cursor);
+      granularity === 'week'
+        ? addDays(cursor, DAYS_PER_WEEK - 1)
+        : endOfMonth(cursor);
     buckets.push({
       from: cursor < range.from ? range.from : cursor,
       to: end > range.to ? range.to : end,
@@ -89,7 +86,7 @@ export function rangeDays(range: DateOnlyRange): number {
   return (
     Math.round(
       (utcDate(range.to).valueOf() - utcDate(range.from).valueOf()) /
-        86_400_000,
+        MILLISECONDS_PER_DAY,
     ) + 1
   );
 }
@@ -104,27 +101,6 @@ function assertRange(range: DateOnlyRange, today: string): void {
   if (range.from > range.to || range.to > today) throw invalidPeriod();
 }
 
-function dateParts(value: string): [number, number, number] {
-  const match = /^(\d{4})-(\d{2})-(\d{2})$/.exec(value);
-  if (!match) throw new Error('Invalid date');
-  const parts = [Number(match[1]), Number(match[2]), Number(match[3])] as [
-    number,
-    number,
-    number,
-  ];
-  if (utcDate(value).toISOString().slice(0, 10) !== value)
-    throw new Error('Invalid date');
-  return parts;
-}
-
-function utcDate(value: string): Date {
-  const match = /^(\d{4})-(\d{2})-(\d{2})$/.exec(value);
-  if (!match) return new Date(NaN);
-  return new Date(
-    Date.UTC(Number(match[1]), Number(match[2]) - 1, Number(match[3])),
-  );
-}
-
 function addDays(value: string, days: number): string {
   const date = utcDate(value);
   date.setUTCDate(date.getUTCDate() + days);
@@ -139,7 +115,7 @@ function dates(range: DateOnlyRange): string[] {
 }
 
 function firstOfMonth(value: string): string {
-  return `${value.slice(0, 7)}-01`;
+  return `${value.slice(0, ISO_MONTH_LENGTH)}-01`;
 }
 
 function endOfMonth(value: string): string {
@@ -165,7 +141,7 @@ function shiftDays(range: DateOnlyRange, days: number): DateOnlyRange {
 function yearAgo(range: DateOnlyRange): DateOnlyRange | null {
   const shift = (value: string) => {
     const [year, month, day] = dateParts(value);
-    const result = `${String(year - 1).padStart(4, '0')}-${String(month).padStart(2, '0')}-${String(day).padStart(2, '0')}`;
+    const result = `${String(year - 1).padStart(ISO_YEAR_LENGTH, '0')}-${String(month).padStart(2, '0')}-${String(day).padStart(2, '0')}`;
     return utcDate(result).toISOString().slice(0, 10) === result
       ? result
       : null;

src/modules/investments/income/income.module.ts

@@ -0,0 +1,12 @@
+import { Module } from '@nestjs/common';
+import { AuthModule } from '../../auth/auth.module';
+import { OperationsModule } from '../operations/operations.module';
+import { IncomeAnalyticsController } from './income-analytics.controller';
+import { IncomeAnalyticsService } from './income-analytics.service';
+
+@Module({
+  imports: [AuthModule, OperationsModule],
+  controllers: [IncomeAnalyticsController],
+  providers: [IncomeAnalyticsService],
+})
+export class IncomeModule {}

src/modules/investments/instruments/application/instrument-market.ts

@@ -1,14 +1,21 @@
+import { MILLISECONDS_PER_SECOND } from '../../../../common/time';
 import { ServiceUnavailableException } from '@nestjs/common';
-import type { TbankTimestamp } from './tbank.client';
-import type { TbankCandle } from './tbank-market.types';
+import type {
+  TbankCandle,
+  TbankTimestamp,
+} from '../../../../integrations/tbank/tbank.api';
+
+const MOSCOW_OFFSET_MS = 10_800_000;
 export function timestamp(value?: TbankTimestamp): string | null {
   const seconds = Number(value?.seconds);
   return Number.isFinite(seconds) && seconds > 0
-    ? new Date(seconds * 1000).toISOString()
+    ? new Date(seconds * MILLISECONDS_PER_SECOND).toISOString()
     : null;
 }
 export function moscowDay(iso: string): string {
-  return new Date(Date.parse(iso) + 3 * 3_600_000).toISOString().slice(0, 10);
+  return new Date(Date.parse(iso) + MOSCOW_OFFSET_MS)
+    .toISOString()
+    .slice(0, 10);
 }
 export function previousClose(
   candles: TbankCandle[],

src/modules/investments/instruments/application/instrument-position.ts

@@ -4,11 +4,17 @@ import {
   divide,
   formatDecimal,
   multiply,
-} from '../common/decimal';
+} from '../../../../common/decimal';
 
-import { MoneyDto } from '../common/money.dto';
-import { PortfolioDto, PortfolioPositionDto } from './portfolio.dto';
-import { StockPositionDto } from './stock.dto';
+import { MoneyDto } from '../../../../common/money.dto';
+import {
+  PortfolioDto,
+  PortfolioPositionDto,
+} from '../../portfolio/portfolio.api';
+import { StockPositionDto } from '../stocks/presentation/stock.dto';
+
+const PRICE_DECIMAL_PLACES = 9;
+const RETURN_PERCENT_DECIMAL_PLACES = 6;
 
 export function instrumentPosition(
   portfolio: PortfolioDto,
@@ -38,7 +44,11 @@ export function instrumentPosition(
         ? {
             currency: totalCost.currency,
             value: formatDecimal(
-              divide(decimalFromString(totalCost.value), quantity, 9),
+              divide(
+                decimalFromString(totalCost.value),
+                quantity,
+                PRICE_DECIMAL_PLACES,
+              ),
             ),
           }
         : null,
@@ -70,13 +80,16 @@ function cost(position: PortfolioPositionDto): MoneyDto | null {
 }
 function sumComplete(values: (MoneyDto | null)[]): MoneyDto | null {
   const currency = values[0]?.currency;
-  if (!currency || values.some((v) => !v || v.currency !== currency))
+  if (
+    !currency ||
+    !values.every((v): v is MoneyDto => v !== null && v.currency === currency)
+  )
     return null;
   return {
     currency,
     value: formatDecimal(
       values.reduce(
-        (sum, value) => add(sum, decimalFromString(value!.value)),
+        (sum, value) => add(sum, decimalFromString(value.value)),
         decimalFromString('0'),
       ),
     ),
@@ -97,7 +110,7 @@ function percent(
     divide(
       multiply(decimalFromString(result.value), decimalFromString('100')),
       decimalFromString(base.value),
-      6,
+      RETURN_PERCENT_DECIMAL_PLACES,
     ),
   );
 }

src/modules/investments/instruments/bonds/application/bond-catalog.service.ts

@@ -0,0 +1,233 @@
+import {
+  ConflictException,
+  Injectable,
+  NotFoundException,
+  ServiceUnavailableException,
+} from '@nestjs/common';
+import { LRUCache } from 'lru-cache';
+import { formatDecimal } from '../../../../../common/decimal';
+import type { TbankBond } from '../../../../../integrations/tbank/tbank.api';
+import {
+  TbankAccessService,
+  TbankClient,
+  type TbankConnectionContext,
+} from '../../../../../integrations/tbank/tbank.api';
+import { decimal } from '../../../../../integrations/tbank/decimal';
+import { optional, timestamp } from '../../application/instrument-market';
+import { BondDto, BondSearchResultDto } from '../presentation/bond.dto';
+
+type IdentifiedBond = TbankBond & { uid: string };
+
+import { money } from '../infrastructure/bond-money.mapper';
+
+const SEARCH_RESULTS_LIMIT = 30;
+@Injectable()
+export class BondCatalogService {
+  private readonly cache = new LRUCache<string, Promise<object>>({
+    max: 300,
+    ttl: 30_000,
+  });
+  constructor(
+    private readonly access: TbankAccessService,
+    private readonly tbank: TbankClient,
+  ) {}
+  search(userId: string, query: string): Promise<BondSearchResultDto[]> {
+    return this.cached(userId, `search:${query}`, async (connection) => {
+      const { token } = connection;
+      const found = await this.tbank.findBonds(token, query);
+      const bonds = selectBonds(found, query).slice(0, SEARCH_RESULTS_LIMIT);
+      if (!bonds.length) return [];
+      // Batch prices and share metadata with detail sections. Resolve readable
+      // aliases only when an issue is opened, not for every search result.
+      const [details, prices] = await Promise.all([
+        Promise.all(
+          bonds.map(
+            async (bond) =>
+              (await optional(
+                () =>
+                  this.bond(userId, connection, bond.uid)
+                    .then(toBond)
+                    .catch((error: unknown) => {
+                      if (error instanceof NotFoundException)
+                        return toBond(bond);
+                      throw error;
+                    }),
+                'details',
+                [],
+              )) ?? toBond(bond),
+          ),
+        ),
+        optional(
+          () =>
+            this.tbank.getLastPrices(
+              token,
+              bonds.map((bond) => bond.uid),
+            ),
+          'prices',
+          [],
+        ),
+      ]);
+      return details.map((detail, index) => {
+        const short = toBond(bonds[index]);
+        const last = prices?.find(
+          (price) => price.instrumentUid === detail.instrumentUid,
+        );
+        return {
+          ...detail,
+          classCode: detail.classCode ?? short.classCode,
+          isin: detail.isin ?? short.isin,
+          apiTradeAvailable: short.apiTradeAvailable,
+          pricePercent: last?.price ? formatDecimal(decimal(last.price)) : null,
+          priceAt: timestamp(last?.time),
+        };
+      });
+    });
+  }
+  get(userId: string, uid: string): Promise<BondDto> {
+    return this.cached(userId, `bond:${uid}`, async (connection) => {
+      const result = toBond(await this.bond(userId, connection, uid));
+      if (
+        !result.ticker ||
+        !/^[A-Za-z0-9][A-Za-z0-9._@+-]{0,79}$/.test(result.ticker)
+      )
+        return result;
+      try {
+        const match = await this.tickerMatch(userId, result.ticker);
+        if (match.uid === uid) result.slug = result.ticker.toUpperCase();
+      } catch (error) {
+        // A readable alias is optional for an exact UID URL, never a reason to substitute another listing.
+        if (
+          !(error instanceof NotFoundException) &&
+          !(error instanceof ConflictException) &&
+          !(error instanceof ServiceUnavailableException)
+        )
+          throw error;
+      }
+      return result;
+    });
+  }
+  async getByTicker(userId: string, ticker: string): Promise<BondDto> {
+    const match = await this.tickerMatch(userId, ticker);
+    return {
+      ...(await this.get(userId, match.uid)),
+      slug: ticker.trim().toUpperCase(),
+    };
+  }
+  private tickerMatch(userId: string, ticker: string): Promise<IdentifiedBond> {
+    const normalized = ticker.trim().toUpperCase();
+    return this.cached(userId, `ticker:${normalized}`, async (connection) => {
+      const { token } = connection;
+      const found = await this.tbank.findBonds(token, normalized);
+      const matches = selectBonds(
+        found.filter(
+          (item) => item.ticker?.trim().toUpperCase() === normalized,
+        ),
+        normalized,
+      );
+      if (!matches.length) throw new NotFoundException();
+      if (matches.length > 1)
+        throw new ConflictException({ code: 'BOND_TICKER_AMBIGUOUS' });
+      return matches[0];
+    });
+  }
+  bond(
+    userId: string,
+    connection: TbankConnectionContext,
+    uid: string,
+  ): Promise<IdentifiedBond> {
+    return this.cachedForConnection(
+      userId,
+      connection,
+      `metadata:${uid}`,
+      async () => {
+        const bond = await this.tbank.getBond(connection.token, uid);
+        if (!bond || bond.uid !== uid) throw new NotFoundException();
+        return { ...bond, uid };
+      },
+    );
+  }
+  cached<T extends object>(
+    userId: string,
+    key: string,
+    operation: (connection: TbankConnectionContext) => Promise<T>,
+  ): Promise<T> {
+    return this.access.withConnection(userId, (connection) =>
+      this.cachedForConnection(userId, connection, key, () =>
+        operation(connection),
+      ),
+    );
+  }
+  cachedForConnection<T extends object>(
+    userId: string,
+    { generation }: TbankConnectionContext,
+    key: string,
+    operation: () => Promise<T>,
+  ): Promise<T> {
+    const cacheKey = JSON.stringify([userId, generation, key]);
+    const cached = this.cache.get(cacheKey);
+    if (cached) return cached as Promise<T>;
+    const pending = operation();
+    this.cache.set(cacheKey, pending);
+    return pending.catch((error) => {
+      if (this.cache.get(cacheKey) === pending) this.cache.delete(cacheKey);
+      throw error;
+    });
+  }
+}
+
+function selectBonds(found: TbankBond[], query: string): IdentifiedBond[] {
+  const seen = new Set<string>();
+  return found
+    .filter(
+      (bond): bond is IdentifiedBond =>
+        Boolean(bond.uid) && bond.instrumentKind === 'INSTRUMENT_TYPE_BOND',
+    )
+    .sort(
+      (a, b) =>
+        Number(b.apiTradeAvailableFlag === true) -
+          Number(a.apiTradeAvailableFlag === true) ||
+        Number(b.ticker?.toUpperCase() === query.toUpperCase()) -
+          Number(a.ticker?.toUpperCase() === query.toUpperCase()) ||
+        Number(b.classCode === 'TQOB') - Number(a.classCode === 'TQOB') ||
+        a.uid.localeCompare(b.uid),
+    )
+    .filter((bond) => {
+      // A missing ISIN must not collapse unrelated catalog instruments.
+      const key = bond.isin?.trim()
+        ? `isin:${bond.isin.trim().toUpperCase()}`
+        : `uid:${bond.uid}`;
+      if (seen.has(key)) return false;
+      seen.add(key);
+      return true;
+    });
+}
+
+function toBond(bond: IdentifiedBond): BondDto {
+  return {
+    instrumentUid: bond.uid,
+    slug: bond.uid,
+    name: bond.name?.trim() || bond.ticker || bond.uid,
+    ticker: bond.ticker?.trim() || null,
+    isin: bond.isin?.trim() || null,
+    classCode: bond.classCode?.trim() || null,
+    realExchange: bond.realExchange || null,
+    apiTradeAvailable: bond.apiTradeAvailableFlag ?? null,
+    logoName: bond.brand?.logoName?.trim() || null,
+    currency: bond.currency?.toUpperCase() || null,
+    bondType: bond.bondType || null,
+    sector: bond.sector || null,
+    lot: bond.lot && bond.lot > 0 ? bond.lot : null,
+    historyFrom: timestamp(bond.first_1dayCandleDate),
+    nominal: money(bond.nominal),
+    initialNominal: money(bond.initialNominal),
+    aci: money(bond.aciValue),
+    maturityDate: timestamp(bond.maturityDate)?.slice(0, 10) ?? null,
+    callDate: timestamp(bond.callDate)?.slice(0, 10) ?? null,
+    couponQuantityPerYear: bond.couponQuantityPerYear ?? null,
+    floatingCoupon: bond.floatingCouponFlag ?? null,
+    perpetual: bond.perpetualFlag ?? null,
+    amortization: bond.amortizationFlag ?? null,
+    subordinated: bond.subordinatedFlag ?? null,
+    riskLevel: bond.riskLevel || null,
+  };
+}

src/modules/investments/instruments/bonds/application/bond-income.service.ts

@@ -0,0 +1,208 @@
+import { Injectable } from '@nestjs/common';
+import {
+  decimalFromString,
+  divide,
+  formatDecimal,
+  multiply,
+} from '../../../../../common/decimal';
+import { MoexClient } from '../../../../../integrations/moex/moex.api';
+import { NcrRatingsClient } from '../../../../../integrations/ncr/ncr.api';
+import {
+  TbankClient,
+  type TbankConnectionContext,
+} from '../../../../../integrations/tbank/tbank.api';
+import { PortfolioService } from '../../../portfolio/portfolio.api';
+import {
+  moscowDay,
+  optional,
+  timestamp,
+} from '../../application/instrument-market';
+import { instrumentPosition } from '../../application/instrument-position';
+import {
+  BondCouponsDto,
+  BondMetricsDto,
+  BondPositionDto,
+} from '../presentation/bond.dto';
+
+import { BondMarketService } from './bond-market.service';
+import { money } from '../infrastructure/bond-money.mapper';
+import { BondCatalogService } from './bond-catalog.service';
+
+const ISO_YEAR_LENGTH = 4;
+const INCOME_HISTORY_YEARS = 5;
+const COUPON_YIELD_DECIMAL_PLACES = 4;
+@Injectable()
+export class BondIncomeService {
+  constructor(
+    private readonly catalog: BondCatalogService,
+    private readonly tbank: TbankClient,
+    private readonly portfolios: PortfolioService,
+    private readonly market: BondMarketService,
+    private readonly moex: MoexClient,
+    private readonly ratings: NcrRatingsClient,
+  ) {}
+  metrics(userId: string, uid: string): Promise<BondMetricsDto> {
+    return this.catalog.cached(userId, `metrics:${uid}`, async (connection) => {
+      const instrument = await this.catalog.bond(userId, connection, uid);
+      const { ticker, isin, classCode } = instrument;
+      const today = moscowDay(new Date().toISOString());
+      const from = `${Number(today.slice(0, ISO_YEAR_LENGTH)) - INCOME_HISTORY_YEARS}${today.slice(ISO_YEAR_LENGTH)}`;
+      const to = `${Number(today.slice(0, ISO_YEAR_LENGTH)) + 1}${today.slice(ISO_YEAR_LENGTH)}`;
+      const unavailable: string[] = [];
+      const [events, quote, effectiveYield, creditRating] = await Promise.all([
+        optional(
+          () => this.couponEvents(userId, connection, uid, from, to),
+          'coupons',
+          unavailable,
+        ),
+        optional(() => this.market.quote(userId, uid), 'quote', unavailable),
+        ticker && isin && classCode
+          ? optional(
+              () => this.moex.bondYield(ticker, isin, classCode),
+              'yield',
+              unavailable,
+            )
+          : null,
+        isin
+          ? optional(() => this.ratings.rating(isin), 'rating', unavailable)
+          : null,
+      ]);
+      const next = events
+        ?.filter((event) => {
+          const date = timestamp(event.couponDate)?.slice(0, 10);
+          return date && date >= today;
+        })
+        .sort(
+          (a, b) =>
+            Number(a.couponDate?.seconds) - Number(b.couponDate?.seconds),
+        )[0];
+      const coupon = money(next?.payOneBond);
+      const period = next?.couponPeriod;
+      const couponPeriodDays =
+        period && Number.isInteger(period) && period > 0 ? period : null;
+      const clean = quote?.cleanPrice;
+      const couponYieldPercent =
+        coupon &&
+        couponPeriodDays &&
+        clean &&
+        coupon.currency === clean.currency &&
+        decimalFromString(coupon.value).value >= 0n &&
+        decimalFromString(clean.value).value > 0n
+          ? formatDecimal(
+              divide(
+                multiply(
+                  decimalFromString(coupon.value),
+                  decimalFromString('36500'),
+                ),
+                multiply(
+                  decimalFromString(String(couponPeriodDays)),
+                  decimalFromString(clean.value),
+                ),
+                COUPON_YIELD_DECIMAL_PLACES,
+              ),
+            )
+          : null;
+      const couponType =
+        next?.couponType && next.couponType !== 'COUPON_TYPE_UNSPECIFIED'
+          ? next.couponType
+          : instrument.floatingCouponFlag === true
+            ? 'COUPON_TYPE_FLOATING'
+            : null;
+      return {
+        creditRating,
+        coupon,
+        couponDate: timestamp(next?.couponDate)?.slice(0, 10) ?? null,
+        couponType,
+        couponPeriodDays,
+        couponYieldPercent,
+        couponYieldPriceAt:
+          couponYieldPercent !== null ? (quote?.priceAt ?? null) : null,
+        effectiveYield,
+        unavailable,
+        observedAt: new Date().toISOString(),
+      };
+    });
+  }
+  private couponEvents(
+    userId: string,
+    connection: TbankConnectionContext,
+    uid: string,
+    from: string,
+    to: string,
+  ) {
+    return this.catalog.cachedForConnection(
+      userId,
+      connection,
+      `coupon-events:${uid}:${from}:${to}`,
+      () => this.tbank.getBondCoupons(connection.token, uid, from, to),
+    );
+  }
+  coupons(userId: string, uid: string): Promise<BondCouponsDto> {
+    return this.catalog.cached(userId, `coupons:${uid}`, async (connection) => {
+      await this.catalog.bond(userId, connection, uid);
+      const today = moscowDay(new Date().toISOString());
+      const from = `${Number(today.slice(0, ISO_YEAR_LENGTH)) - INCOME_HISTORY_YEARS}${today.slice(ISO_YEAR_LENGTH)}`;
+      const to = `${Number(today.slice(0, ISO_YEAR_LENGTH)) + 1}${today.slice(ISO_YEAR_LENGTH)}`;
+      const unavailable: string[] = [];
+      const [events, position] = await Promise.all([
+        this.couponEvents(userId, connection, uid, from, to),
+        optional(() => this.position(userId, uid), 'position', unavailable),
+      ]);
+      const quantity =
+        position?.accounts.length &&
+        position.accounts.every((p) => decimalFromString(p.quantity).value > 0n)
+          ? decimalFromString(position.quantity)
+          : null;
+      const coupons = events
+        .map((event) => {
+          const paymentDate = timestamp(event.couponDate)?.slice(0, 10) ?? null;
+          const recordDate = timestamp(event.fixDate)?.slice(0, 10) ?? null;
+          const perBond = money(event.payOneBond);
+          const timing = !paymentDate
+            ? ('undated' as const)
+            : paymentDate >= today
+              ? ('upcoming' as const)
+              : ('past' as const);
+          return {
+            number: event.couponNumber ?? null,
+            paymentDate,
+            recordDate,
+            perBond,
+            couponType: event.couponType ?? null,
+            periodDays: event.couponPeriod ?? null,
+            timing,
+            estimatedAmount:
+              quantity &&
+              perBond &&
+              timing === 'upcoming' &&
+              recordDate &&
+              recordDate >= today
+                ? {
+                    currency: perBond.currency,
+                    value: formatDecimal(
+                      multiply(quantity, decimalFromString(perBond.value)),
+                    ),
+                  }
+                : null,
+          };
+        })
+        .sort((a, b) =>
+          (a.paymentDate ?? '').localeCompare(b.paymentDate ?? ''),
+        );
+      return {
+        coupons,
+        from,
+        to,
+        observedAt: new Date().toISOString(),
+        positionAt: quantity ? (position?.observedAt ?? null) : null,
+        estimateUnavailable: unavailable.length > 0,
+        positionIsStale: position?.isStale ?? false,
+      };
+    });
+  }
+  async position(userId: string, uid: string): Promise<BondPositionDto> {
+    return this.catalog.cached(userId, `position:${uid}`, async () =>
+      instrumentPosition(await this.portfolios.getAll(userId), uid, 'BOND'),
+    );
+  }
+}