Merge pull request 'feature/api_endpoint' (#5) from feature/api_endpoint into main

Reviewed-on: #5

LICENSE

@@ -0,0 +1,19 @@
+Copyright (c) 2025 Tianyu Liu, Studio TJ
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
+OR OTHER DEALINGS IN THE SOFTWARE.

README.md

@@ -0,0 +1,28 @@
+
+# Trading Journal (Work In Progress)
+
+A simple trading journal application (work in progress).
+
+This repository contains the backend of a trading journal designed to help you record and analyse trades. The system is specially designed to support journaling trades for the "wheel" options strategy, but it also supports other trade types such as long/short spot positions, forex, and more.
+
+Important: the project is still under active development. There is a backend in this repo, but the frontend UI has not been implemented yet.
+
+## Key features
+
+- Journal trades with rich metadata (strategy, entry/exit, P/L, notes).
+- Built-in support and data model conveniences for the Wheel strategy (puts/calls lifecycle tracking).
+- Flexible support for other trade types: long/short spots, forex, futures, etc.
+- Backend-first design with tests and migration helpers.
+
+## Repository layout
+
+- `backend/` — Python backend code (API, models, services, migrations, tests).
+- `backend/trading_journal/` — core application modules: CRUD, models, DTOs, services, and security.
+- `backend/tests/` — unit tests targeting the backend logic and DB layer.
+
+
+## License
+
+See the `LICENSE` file in the project root for license details.
+
+

backend/.vscode/launch.json

@@ -13,10 +13,14 @@
                 "app:app",
                 "--host=0.0.0.0",
                 "--reload",
-                "--port=5000"
+                "--port=18881"
             ],
             "jinja": true,
-            "autoStartBrowser": true
+            "autoStartBrowser": false,
+            "env": {
+                "CONFIG_FILE": "devsettings.yaml"
+            },
+            "console": "integratedTerminal"
         }
     ]
 }

backend/app.py

@@ -7,11 +7,27 @@ from datetime import datetime, timezone
 from typing import TYPE_CHECKING
 
 from fastapi import FastAPI, HTTPException, Request, status
+from fastapi.encoders import jsonable_encoder
 from fastapi.responses import JSONResponse, Response
 
 import settings
 from trading_journal import db, service
-from trading_journal.dto import ExchangesBase, SessionsBase, SessionsCreate, UserCreate, UserLogin, UserRead
+from trading_journal.dto import (
+    CycleBase,
+    CycleRead,
+    CycleUpdate,
+    ExchangesBase,
+    ExchangesRead,
+    SessionsBase,
+    SessionsCreate,
+    TradeCreate,
+    TradeFriendlyNameUpdate,
+    TradeNoteUpdate,
+    TradeRead,
+    UserCreate,
+    UserLogin,
+    UserRead,
+)
 
 if TYPE_CHECKING:
     from collections.abc import AsyncGenerator
@@ -36,8 +52,14 @@ async def lifespan(app: FastAPI) -> AsyncGenerator[None, None]:  # noqa: ARG001
         await asyncio.to_thread(_db.dispose)
 
 
+origins = [
+    "http://127.0.0.1:18881",
+]
+
 app = FastAPI(lifespan=lifespan)
-app.add_middleware(service.AuthMiddleWare)
+app.add_middleware(
+    service.AuthMiddleWare,
+)
 app.state.db_factory = _db
 
 
@@ -61,7 +83,7 @@ async def register_user(request: Request, user_in: UserCreate) -> Response:
         raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(e)) from e
     except Exception as e:
         logger.exception("Failed to register user: \n")
-        raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="Internal server error") from e
+        raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="Internal Server Error") from e
 
 
 @app.post(f"{settings.settings.api_base}/login")
@@ -94,7 +116,7 @@ async def login(request: Request, user_in: UserLogin) -> Response:
         )
     except Exception as e:
         logger.exception("Failed to login user: \n")
-        raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="Internal server error") from e
+        raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="Internal Server Error") from e
     else:
         return response
 
@@ -119,10 +141,10 @@ async def create_exchange(request: Request, exchange_data: ExchangesBase) -> Res
 
 
 @app.get(f"{settings.settings.api_base}/exchanges")
-async def get_exchanges(request: Request) -> list[ExchangesBase]:
+async def get_exchanges(request: Request) -> list[ExchangesRead]:
     db_factory: Database = request.app.state.db_factory
 
-    def sync_work() -> list[ExchangesBase]:
+    def sync_work() -> list[ExchangesRead]:
         with db_factory.get_session_ctx_manager() as db:
             return service.get_exchanges_by_user_service(db, request.state.user_id)
 
@@ -133,4 +155,170 @@ async def get_exchanges(request: Request) -> list[ExchangesBase]:
         raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="Internal server error") from e
 
 
-# Trade
+@app.patch(f"{settings.settings.api_base}/exchanges/{{exchange_id}}")
+async def update_exchange(request: Request, exchange_id: int, exchange_data: ExchangesBase) -> Response:
+    db_factory: Database = request.app.state.db_factory
+
+    def sync_work() -> ExchangesBase:
+        with db_factory.get_session_ctx_manager() as db:
+            return service.update_exchanges_service(db, request.state.user_id, exchange_id, exchange_data.name, exchange_data.notes)
+
+    try:
+        exchange = await asyncio.to_thread(sync_work)
+        return JSONResponse(status_code=status.HTTP_200_OK, content=exchange.model_dump())
+    except service.ExchangeNotFoundError as e:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(e)) from e
+    except service.ExchangeAlreadyExistsError as e:
+        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(e)) from e
+    except Exception as e:
+        logger.exception("Failed to update exchange: \n")
+        raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="Internal server error") from e
+
+
+# Cycle
+@app.post(f"{settings.settings.api_base}/cycles")
+async def create_cycle(request: Request, cycle_data: CycleBase) -> Response:
+    return JSONResponse(status_code=status.HTTP_405_METHOD_NOT_ALLOWED, content="Not supported.")
+    db_factory: Database = request.app.state.db_factory
+
+    def sync_work() -> CycleBase:
+        with db_factory.get_session_ctx_manager() as db:
+            return service.create_cycle_service(db, request.state.user_id, cycle_data)
+
+    try:
+        cycle = await asyncio.to_thread(sync_work)
+        return JSONResponse(status_code=status.HTTP_201_CREATED, content=jsonable_encoder(cycle))
+    except Exception as e:
+        logger.exception("Failed to create cycle: \n")
+        raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="Internal server error") from e
+
+
+@app.get(f"{settings.settings.api_base}/cycles/{{cycle_id}}")
+async def get_cycle_by_id(request: Request, cycle_id: int) -> Response:
+    db_factory: Database = request.app.state.db_factory
+
+    def sync_work() -> CycleBase:
+        with db_factory.get_session_ctx_manager() as db:
+            return service.get_cycle_by_id_service(db, request.state.user_id, cycle_id)
+
+    try:
+        cycle = await asyncio.to_thread(sync_work)
+        return JSONResponse(status_code=status.HTTP_200_OK, content=jsonable_encoder(cycle))
+    except service.CycleNotFoundError as e:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(e)) from e
+    except Exception as e:
+        logger.exception("Failed to get cycle by id: \n")
+        raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="Internal server error") from e
+
+
+@app.get(f"{settings.settings.api_base}/cycles/user/{{user_id}}")
+async def get_cycles_by_user(request: Request, user_id: int) -> Response:
+    db_factory: Database = request.app.state.db_factory
+
+    def sync_work() -> list[CycleRead]:
+        with db_factory.get_session_ctx_manager() as db:
+            return service.get_cycles_by_user_service(db, user_id)
+
+    try:
+        cycles = await asyncio.to_thread(sync_work)
+        return JSONResponse(status_code=status.HTTP_200_OK, content=jsonable_encoder(cycles))
+    except Exception as e:
+        logger.exception("Failed to get cycles by user: \n")
+        raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="Internal server error") from e
+
+
+@app.patch(f"{settings.settings.api_base}/cycles")
+async def update_cycle(request: Request, cycle_data: CycleUpdate) -> Response:
+    db_factory: Database = request.app.state.db_factory
+
+    def sync_work() -> CycleRead:
+        with db_factory.get_session_ctx_manager() as db:
+            return service.update_cycle_service(db, request.state.user_id, cycle_data)
+
+    try:
+        cycle = await asyncio.to_thread(sync_work)
+        return JSONResponse(status_code=status.HTTP_200_OK, content=jsonable_encoder(cycle))
+    except service.InvalidCycleDataError as e:
+        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(e)) from e
+    except service.CycleNotFoundError as e:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(e)) from e
+    except Exception as e:
+        logger.exception("Failed to update cycle: \n")
+        raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="Internal server error") from e
+
+
+@app.post(f"{settings.settings.api_base}/trades")
+async def create_trade(request: Request, trade_data: TradeCreate) -> Response:
+    db_factory: Database = request.app.state.db_factory
+
+    def sync_work() -> TradeRead:
+        with db_factory.get_session_ctx_manager() as db:
+            return service.create_trade_service(db, request.state.user_id, trade_data)
+
+    try:
+        trade = await asyncio.to_thread(sync_work)
+        return JSONResponse(status_code=status.HTTP_201_CREATED, content=jsonable_encoder(trade))
+    except service.InvalidTradeDataError as e:
+        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(e)) from e
+    except Exception as e:
+        logger.exception("Failed to create trade: \n")
+        raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="Internal server error") from e
+
+
+@app.get(f"{settings.settings.api_base}/trades/{{trade_id}}")
+async def get_trade_by_id(request: Request, trade_id: int) -> Response:
+    db_factory: Database = request.app.state.db_factory
+
+    def sync_work() -> TradeRead:
+        with db_factory.get_session_ctx_manager() as db:
+            return service.get_trade_by_id_service(db, request.state.user_id, trade_id)
+
+    try:
+        trade = await asyncio.to_thread(sync_work)
+        return JSONResponse(status_code=status.HTTP_200_OK, content=jsonable_encoder(trade))
+    except service.TradeNotFoundError as e:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(e)) from e
+    except Exception as e:
+        logger.exception("Failed to get trade by id: \n")
+        raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="Internal server error") from e
+
+
+@app.patch(f"{settings.settings.api_base}/trades/friendlyname")
+async def update_trade_friendly_name(request: Request, friendly_name_update: TradeFriendlyNameUpdate) -> Response:
+    db_factory: Database = request.app.state.db_factory
+
+    def sync_work() -> TradeRead:
+        with db_factory.get_session_ctx_manager() as db:
+            return service.update_trade_friendly_name_service(
+                db,
+                request.state.user_id,
+                friendly_name_update.id,
+                friendly_name_update.friendly_name,
+            )
+
+    try:
+        trade = await asyncio.to_thread(sync_work)
+        return JSONResponse(status_code=status.HTTP_200_OK, content=jsonable_encoder(trade))
+    except service.TradeNotFoundError as e:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(e)) from e
+    except Exception as e:
+        logger.exception("Failed to update trade friendly name: \n")
+        raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="Internal server error") from e
+
+
+@app.patch(f"{settings.settings.api_base}/trades/notes")
+async def update_trade_note(request: Request, note_update: TradeNoteUpdate) -> Response:
+    db_factory: Database = request.app.state.db_factory
+
+    def sync_work() -> TradeRead:
+        with db_factory.get_session_ctx_manager() as db:
+            return service.update_trade_note_service(db, request.state.user_id, note_update.id, note_update.notes)
+
+    try:
+        trade = await asyncio.to_thread(sync_work)
+        return JSONResponse(status_code=status.HTTP_200_OK, content=jsonable_encoder(trade))
+    except service.TradeNotFoundError as e:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(e)) from e
+    except Exception as e:
+        logger.exception("Failed to update trade note: \n")
+        raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="Internal server error") from e

backend/openapi.yaml

@@ -0,0 +1,554 @@
+openapi: "3.0.3"
+info:
+  title: Trading Journal API
+  version: "1.0.0"
+  description: OpenAPI description generated from [`app.py`](app.py) and DTOs in [`trading_journal/dto.py`](trading_journal/dto.py).
+servers:
+  - url: "http://127.0.0.1:18881{basePath}"
+    variables:
+      basePath:
+        default: "/api/v1"
+        description: "API base path (matches settings.settings.api_base)"
+components:
+  securitySchemes:
+    session_cookie:
+      type: apiKey
+      in: cookie
+      name: session_token
+  schemas:
+    UserCreate:
+      $ref: "#/components/schemas/UserCreate_impl"
+    UserCreate_impl:
+      type: object
+      required:
+        - username
+        - password
+      properties:
+        username:
+          type: string
+        is_active:
+          type: boolean
+          default: true
+        password:
+          type: string
+    UserLogin:
+      type: object
+      required:
+        - username
+        - password
+      properties:
+        username:
+          type: string
+        password:
+          type: string
+    UserRead:
+      type: object
+      required:
+        - id
+        - username
+      properties:
+        id:
+          type: integer
+        username:
+          type: string
+        is_active:
+          type: boolean
+    SessionsBase:
+      type: object
+      required:
+        - user_id
+      properties:
+        user_id:
+          type: integer
+    SessionsCreate:
+      allOf:
+        - $ref: "#/components/schemas/SessionsBase"
+        - type: object
+          required:
+            - expires_at
+          properties:
+            expires_at:
+              type: string
+              format: date-time
+    ExchangesBase:
+      type: object
+      required:
+        - name
+      properties:
+        name:
+          type: string
+        notes:
+          type: string
+          nullable: true
+    ExchangesRead:
+      allOf:
+        - $ref: "#/components/schemas/ExchangesBase"
+        - type: object
+          required:
+            - id
+          properties:
+            id:
+              type: integer
+    CycleBase:
+      type: object
+      properties:
+        friendly_name:
+          type: string
+          nullable: true
+        status:
+          type: string
+        end_date:
+          type: string
+          format: date
+          nullable: true
+        funding_source:
+          type: string
+          nullable: true
+        capital_exposure_cents:
+          type: integer
+          nullable: true
+        loan_amount_cents:
+          type: integer
+          nullable: true
+        loan_interest_rate_tenth_bps:
+          type: integer
+          nullable: true
+        trades:
+          type: array
+          items:
+            $ref: "#/components/schemas/TradeRead"
+          nullable: true
+        exchange:
+          $ref: "#/components/schemas/ExchangesRead"
+          nullable: true
+    CycleCreate:
+      allOf:
+        - $ref: "#/components/schemas/CycleBase"
+        - type: object
+          required:
+            - user_id
+            - symbol
+            - exchange_id
+            - underlying_currency
+            - start_date
+          properties:
+            user_id:
+              type: integer
+            symbol:
+              type: string
+            exchange_id:
+              type: integer
+            underlying_currency:
+              type: string
+            start_date:
+              type: string
+              format: date
+    CycleUpdate:
+      allOf:
+        - $ref: "#/components/schemas/CycleBase"
+        - type: object
+          required:
+            - id
+          properties:
+            id:
+              type: integer
+    CycleRead:
+      allOf:
+        - $ref: "#/components/schemas/CycleCreate"
+        - type: object
+          required:
+            - id
+          properties:
+            id:
+              type: integer
+    TradeBase:
+      type: object
+      required:
+        - symbol
+        - underlying_currency
+        - trade_type
+        - trade_strategy
+        - trade_date
+        - quantity
+        - price_cents
+        - commission_cents
+      properties:
+        friendly_name:
+          type: string
+          nullable: true
+        symbol:
+          type: string
+        exchange_id:
+          type: integer
+        underlying_currency:
+          type: string
+        trade_type:
+          type: string
+        trade_strategy:
+          type: string
+        trade_date:
+          type: string
+          format: date
+        quantity:
+          type: integer
+        price_cents:
+          type: integer
+        commission_cents:
+          type: integer
+        notes:
+          type: string
+          nullable: true
+        cycle_id:
+          type: integer
+          nullable: true
+    TradeCreate:
+      allOf:
+        - $ref: "#/components/schemas/TradeBase"
+        - type: object
+          properties:
+            user_id:
+              type: integer
+              nullable: true
+            trade_time_utc:
+              type: string
+              format: date-time
+              nullable: true
+            gross_cash_flow_cents:
+              type: integer
+              nullable: true
+            net_cash_flow_cents:
+              type: integer
+              nullable: true
+            quantity_multiplier:
+              type: integer
+              default: 1
+            expiry_date:
+              type: string
+              format: date
+              nullable: true
+            strike_price_cents:
+              type: integer
+              nullable: true
+            is_invalidated:
+              type: boolean
+              default: false
+            invalidated_at:
+              type: string
+              format: date-time
+              nullable: true
+            replaced_by_trade_id:
+              type: integer
+              nullable: true
+    TradeNoteUpdate:
+      type: object
+      required:
+        - id
+      properties:
+        id:
+          type: integer
+        notes:
+          type: string
+          nullable: true
+    TradeFriendlyNameUpdate:
+      type: object
+      required:
+        - id
+        - friendly_name
+      properties:
+        id:
+          type: integer
+        friendly_name:
+          type: string
+    TradeRead:
+      allOf:
+        - $ref: "#/components/schemas/TradeCreate"
+        - type: object
+          required:
+            - id
+          properties:
+            id:
+              type: integer
+paths:
+  /status:
+    get:
+      summary: "Get API status"
+      security: [] # no auth required
+      responses:
+        "200":
+          description: OK
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  status:
+                    type: string
+  /register:
+    post:
+      summary: "Register user"
+      security: [] # no auth required
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/UserCreate"
+      responses:
+        "201":
+          description: Created
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/UserRead"
+        "400":
+          description: Bad Request (user exists)
+        "500":
+          description: Internal Server Error
+  /login:
+    post:
+      summary: "Login"
+      security: [] # no auth required
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/UserLogin"
+      responses:
+        "200":
+          description: OK (sets session cookie)
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/SessionsBase"
+          headers:
+            Set-Cookie:
+              description: session cookie
+              schema:
+                type: string
+        "401":
+          description: Unauthorized
+        "500":
+          description: Internal Server Error
+  /exchanges:
+    post:
+      summary: "Create exchange"
+      security:
+        - session_cookie: []
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/ExchangesBase"
+      responses:
+        "201":
+          description: Created
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/ExchangesRead"
+        "400":
+          description: Bad Request
+        "401":
+          description: Unauthorized
+    get:
+      summary: "List user exchanges"
+      security:
+        - session_cookie: []
+      responses:
+        "200":
+          description: OK
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  $ref: "#/components/schemas/ExchangesRead"
+        "401":
+          description: Unauthorized
+  /exchanges/{exchange_id}:
+    patch:
+      summary: "Update exchange"
+      security:
+        - session_cookie: []
+      parameters:
+        - name: exchange_id
+          in: path
+          required: true
+          schema:
+            type: integer
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/ExchangesBase"
+      responses:
+        "200":
+          description: Updated
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/ExchangesRead"
+        "404":
+          description: Not found
+        "400":
+          description: Bad request
+  /cycles:
+    post:
+      summary: "Create cycle (currently returns 405 in code)"
+      security:
+        - session_cookie: []
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/CycleBase"
+      responses:
+        "405":
+          description: Method not allowed (app currently returns 405)
+    patch:
+      summary: "Update cycle"
+      security:
+        - session_cookie: []
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/CycleUpdate"
+      responses:
+        "200":
+          description: Updated
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/CycleRead"
+        "400":
+          description: Invalid data
+        "404":
+          description: Not found
+  /cycles/{cycle_id}:
+    get:
+      summary: "Get cycle by id"
+      security:
+        - session_cookie: []
+      parameters:
+        - name: cycle_id
+          in: path
+          required: true
+          schema:
+            type: integer
+      responses:
+        "200":
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/CycleRead"
+        "404":
+          description: Not found
+  /cycles/user/{user_id}:
+    get:
+      summary: "Get cycles by user id"
+      security:
+        - session_cookie: []
+      parameters:
+        - name: user_id
+          in: path
+          required: true
+          schema:
+            type: integer
+      responses:
+        "200":
+          description: OK
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  $ref: "#/components/schemas/CycleRead"
+  /trades:
+    post:
+      summary: "Create trade"
+      security:
+        - session_cookie: []
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/TradeCreate"
+      responses:
+        "201":
+          description: Created
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/TradeRead"
+        "400":
+          description: Invalid trade data
+        "500":
+          description: Internal Server Error
+  /trades/{trade_id}:
+    get:
+      summary: "Get trade by id"
+      security:
+        - session_cookie: []
+      parameters:
+        - name: trade_id
+          in: path
+          required: true
+          schema:
+            type: integer
+      responses:
+        "200":
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/TradeRead"
+        "404":
+          description: Not found
+  /trades/friendlyname:
+    patch:
+      summary: "Update trade friendly name"
+      security:
+        - session_cookie: []
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/TradeFriendlyNameUpdate"
+      responses:
+        "200":
+          description: Updated
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/TradeRead"
+        "404":
+          description: Not found
+  /trades/notes:
+    patch:
+      summary: "Update trade notes"
+      security:
+        - session_cookie: []
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/TradeNoteUpdate"
+      responses:
+        "200":
+          description: Updated
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/TradeRead"
+        "404":
+          description: Not found

backend/testhelpers/tradecycles.sh

@@ -0,0 +1,56 @@
+curl --location '127.0.0.1:18881/api/v1/trades' \
+--header 'Content-Type: application/json' \
+--header 'Cookie: session_token=uYsEZZdH9ecQ432HQUdfab292I14suk4GuI12-cAyuw' \
+--data '{
+    "friendly_name": "20250908-CA-PUT",
+    "symbol": "CA",
+    "exchange_id": 1,
+    "underlying_currency": "EUR",
+    "trade_type": "SELL_PUT",
+    "trade_strategy": "WHEEL",
+    "trade_date": "2025-09-08",
+    "quantity": 1,
+    "quantity_multiplier": 100,
+    "price_cents": 17,
+    "expiry_date": "2025-09-09",
+    "strike_price_cents": 1220,
+    "commission_cents": 114
+}'
+
+curl --location '127.0.0.1:18881/api/v1/trades' \
+--header 'Content-Type: application/json' \
+--header 'Cookie: session_token=uYsEZZdH9ecQ432HQUdfab292I14suk4GuI12-cAyuw' \
+--data '{
+    "friendly_name": "20250920-CA-ASSIGN",
+    "symbol": "CA",
+    "exchange_id": 1,
+    "cycle_id": 1,
+    "underlying_currency": "EUR",
+    "trade_type": "ASSIGNMENT",
+    "trade_strategy": "WHEEL",
+    "trade_date": "2025-09-20",
+    "quantity": 100,
+    "quantity_multiplier": 1,
+    "price_cents": 1220,
+    "commission_cents": 0
+}'
+
+curl --location '127.0.0.1:18881/api/v1/trades' \
+--header 'Content-Type: application/json' \
+--header 'Cookie: session_token=uYsEZZdH9ecQ432HQUdfab292I14suk4GuI12-cAyuw' \
+--data '{
+    "friendly_name": "20250923-CA-CALL",
+    "symbol": "CA",
+    "exchange_id": 1,
+    "cycle_id": 1,
+    "underlying_currency": "EUR",
+    "trade_type": "SELL_CALL",
+    "trade_strategy": "WHEEL",
+    "trade_date": "2025-09-23",
+    "quantity": 1,
+    "quantity_multiplier": 100,
+    "price_cents": 31,
+    "expiry_date": "2025-10-10",
+    "strike_price_cents": 1200,
+    "commission_cents": 114
+}'

backend/tests/test_app.py

@@ -1,19 +1,405 @@
-from collections.abc import Generator
+from collections.abc import Callable
+from datetime import datetime, timedelta, timezone
+from types import SimpleNamespace
+from unittest.mock import MagicMock
 
 import pytest
+from fastapi import FastAPI, status
+from fastapi.responses import JSONResponse
 from fastapi.testclient import TestClient
 
 import settings
-from app import app
+import trading_journal.service as svc
 
 
 @pytest.fixture
-def client() -> Generator[TestClient, None, None]:
-    with TestClient(app) as client:
-        yield client
+def client_factory(monkeypatch: pytest.MonkeyPatch) -> Callable[..., TestClient]:
+    class NoAuth:
+        def __init__(self, app: FastAPI, **opts) -> None:  # noqa: ANN003, ARG002
+            self.app = app
+
+        async def __call__(self, scope, receive, send) -> None:  # noqa: ANN001
+            state = scope.get("state")
+            if state is None:
+                scope["state"] = SimpleNamespace()
+            scope["state"]["user_id"] = 1
+            await self.app(scope, receive, send)
+
+    class DeclineAuth:
+        def __init__(self, app: FastAPI, **opts) -> None:  # noqa: ANN003, ARG002
+            self.app = app
+
+        async def __call__(self, scope, receive, send) -> None:  # noqa: ANN001
+            if scope.get("type") != "http":
+                await self.app(scope, receive, send)
+                return
+            path = scope.get("path", "")
+            # allow public/exempt paths through
+            if getattr(svc, "EXCEPT_PATHS", []) and path in svc.EXCEPT_PATHS:
+                await self.app(scope, receive, send)
+                return
+            # immediately respond 401 for protected paths
+            resp = JSONResponse({"detail": "Unauthorized"}, status_code=status.HTTP_401_UNAUTHORIZED)
+            await resp(scope, receive, send)
+
+    def _factory(*, decline_auth: bool = False, **mocks: dict) -> TestClient:
+        defaults = {
+            "register_user_service": MagicMock(return_value=SimpleNamespace(model_dump=lambda: {"id": 1, "username": "mock"})),
+            "authenticate_user_service": MagicMock(
+                return_value=(SimpleNamespace(user_id=1, expires_at=(datetime.now(timezone.utc) + timedelta(hours=1))), "token"),
+            ),
+            "create_exchange_service": MagicMock(
+                return_value=SimpleNamespace(model_dump=lambda: {"name": "Binance", "notes": "some note", "user_id": 1}),
+            ),
+            "get_exchanges_by_user_service": MagicMock(return_value=[]),
+        }
+
+        if decline_auth:
+            monkeypatch.setattr(svc, "AuthMiddleWare", DeclineAuth)
+        else:
+            monkeypatch.setattr(svc, "AuthMiddleWare", NoAuth)
+        merged = {**defaults, **mocks}
+        for name, mock in merged.items():
+            monkeypatch.setattr(svc, name, mock)
+        import sys
+
+        if "app" in sys.modules:
+            del sys.modules["app"]
+        from importlib import import_module
+
+        app = import_module("app").app  # re-import app module
+
+        return TestClient(app)
+
+    return _factory
 
 
-def test_get_status(client: TestClient) -> None:
-    response = client.get(f"{settings.settings.api_base}/status")
+def test_get_status(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory()
+    with client as c:
+        response = c.get(f"{settings.settings.api_base}/status")
         assert response.status_code == 200
         assert response.json() == {"status": "ok"}
+
+
+def test_register_success(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory()  # use defaults
+    with client as c:
+        r = c.post(f"{settings.settings.api_base}/register", json={"username": "a", "password": "b"})
+        assert r.status_code == 201
+
+
+def test_register_user_already_exists(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory(register_user_service=MagicMock(side_effect=svc.UserAlreadyExistsError("username already exists")))
+    with client as c:
+        r = c.post(f"{settings.settings.api_base}/register", json={"username": "a", "password": "b"})
+        assert r.status_code == status.HTTP_400_BAD_REQUEST
+        assert r.json() == {"detail": "username already exists"}
+
+
+def test_register_user_internal_server_error(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory(register_user_service=MagicMock(side_effect=Exception("db is down")))
+    with client as c:
+        r = c.post(f"{settings.settings.api_base}/register", json={"username": "a", "password": "b"})
+        assert r.status_code == status.HTTP_500_INTERNAL_SERVER_ERROR
+        assert r.json() == {"detail": "Internal Server Error"}
+
+
+def test_login_success(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory()  # use defaults
+    with client as c:
+        r = c.post(f"{settings.settings.api_base}/login", json={"username": "a", "password": "b"})
+        assert r.status_code == 200
+        assert r.json() == {"user_id": 1}
+        assert r.cookies.get("session_token") == "token"
+
+
+def test_login_failed_auth(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory(authenticate_user_service=MagicMock(return_value=None))
+    with client as c:
+        r = c.post(f"{settings.settings.api_base}/login", json={"username": "a", "password": "b"})
+        assert r.status_code == status.HTTP_401_UNAUTHORIZED
+        assert r.json() == {"detail": "Invalid username or password, or user doesn't exist"}
+
+
+def test_login_internal_server_error(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory(authenticate_user_service=MagicMock(side_effect=Exception("db is down")))
+    with client as c:
+        r = c.post(f"{settings.settings.api_base}/login", json={"username": "a", "password": "b"})
+        assert r.status_code == status.HTTP_500_INTERNAL_SERVER_ERROR
+        assert r.json() == {"detail": "Internal Server Error"}
+
+
+def test_create_exchange_success(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory()
+    with client as c:
+        r = c.post(f"{settings.settings.api_base}/exchanges", json={"name": "Binance"})
+        assert r.status_code == 201
+        assert r.json() == {"user_id": 1, "name": "Binance", "notes": "some note"}
+
+
+def test_create_exchange_already_exists(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory(create_exchange_service=MagicMock(side_effect=svc.ExchangeAlreadyExistsError("exchange already exists")))
+    with client as c:
+        r = c.post(f"{settings.settings.api_base}/exchanges", json={"name": "Binance"})
+        assert r.status_code == status.HTTP_400_BAD_REQUEST
+        assert r.json() == {"detail": "exchange already exists"}
+
+
+def test_get_exchanges_unauthenticated(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory(decline_auth=True)
+    with client as c:
+        r = c.get(f"{settings.settings.api_base}/exchanges")
+        assert r.status_code == status.HTTP_401_UNAUTHORIZED
+        assert r.json() == {"detail": "Unauthorized"}
+
+
+def test_get_exchanges_success(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory()
+    with client as c:
+        r = c.get(f"{settings.settings.api_base}/exchanges")
+        assert r.status_code == 200
+        assert r.json() == []
+
+
+def test_update_exchanges_success(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory(
+        update_exchanges_service=MagicMock(
+            return_value=SimpleNamespace(model_dump=lambda: {"user_id": 1, "name": "BinanceUS", "notes": "updated note"}),
+        ),
+    )
+    with client as c:
+        r = c.patch(f"{settings.settings.api_base}/exchanges/1", json={"name": "BinanceUS", "notes": "updated note"})
+        assert r.status_code == 200
+        assert r.json() == {"user_id": 1, "name": "BinanceUS", "notes": "updated note"}
+
+
+def test_update_exchanges_not_found(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory(update_exchanges_service=MagicMock(side_effect=svc.ExchangeNotFoundError("exchange not found")))
+    with client as c:
+        r = c.patch(f"{settings.settings.api_base}/exchanges/999", json={"name": "NonExistent", "notes": "no note"})
+        assert r.status_code == status.HTTP_404_NOT_FOUND
+        assert r.json() == {"detail": "exchange not found"}
+
+
+def test_get_cycles_by_id_success(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory(
+        get_cycle_by_id_service=MagicMock(
+            return_value=SimpleNamespace(
+                friendly_name="Cycle 1",
+                status="active",
+                id=1,
+            ),
+        ),
+    )
+    with client as c:
+        r = c.get(f"{settings.settings.api_base}/cycles/1")
+        assert r.status_code == 200
+        assert r.json() == {"id": 1, "friendly_name": "Cycle 1", "status": "active"}
+
+
+def test_get_cycles_by_id_not_found(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory(get_cycle_by_id_service=MagicMock(side_effect=svc.CycleNotFoundError("cycle not found")))
+    with client as c:
+        r = c.get(f"{settings.settings.api_base}/cycles/999")
+        assert r.status_code == status.HTTP_404_NOT_FOUND
+        assert r.json() == {"detail": "cycle not found"}
+
+
+def test_get_cycles_by_user_success(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory(
+        get_cycles_by_user_service=MagicMock(
+            return_value=[
+                SimpleNamespace(
+                    friendly_name="Cycle 1",
+                    status="active",
+                    id=1,
+                ),
+                SimpleNamespace(
+                    friendly_name="Cycle 2",
+                    status="completed",
+                    id=2,
+                ),
+            ],
+        ),
+    )
+    with client as c:
+        r = c.get(f"{settings.settings.api_base}/cycles/user/1")
+        assert r.status_code == 200
+        assert r.json() == [
+            {"id": 1, "friendly_name": "Cycle 1", "status": "active"},
+            {"id": 2, "friendly_name": "Cycle 2", "status": "completed"},
+        ]
+
+
+def test_update_cycles_success(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory(
+        update_cycle_service=MagicMock(
+            return_value=SimpleNamespace(
+                friendly_name="Updated Cycle",
+                status="completed",
+                id=1,
+            ),
+        ),
+    )
+    with client as c:
+        r = c.patch(f"{settings.settings.api_base}/cycles", json={"friendly_name": "Updated Cycle", "status": "completed", "id": 1})
+        assert r.status_code == 200
+        assert r.json() == {"id": 1, "friendly_name": "Updated Cycle", "status": "completed"}
+
+
+def test_update_cycles_invalid_cycle_data(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory(
+        update_cycle_service=MagicMock(side_effect=svc.InvalidCycleDataError("invalid cycle data")),
+    )
+    with client as c:
+        r = c.patch(f"{settings.settings.api_base}/cycles", json={"friendly_name": "", "status": "unknown", "id": 1})
+        assert r.status_code == status.HTTP_400_BAD_REQUEST
+        assert r.json() == {"detail": "invalid cycle data"}
+
+
+def test_update_cycles_not_found(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory(update_cycle_service=MagicMock(side_effect=svc.CycleNotFoundError("cycle not found")))
+    with client as c:
+        r = c.patch(f"{settings.settings.api_base}/cycles", json={"friendly_name": "NonExistent", "status": "active", "id": 999})
+        assert r.status_code == status.HTTP_404_NOT_FOUND
+        assert r.json() == {"detail": "cycle not found"}
+
+
+def test_create_trade_success(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory(
+        create_trade_service=MagicMock(
+            return_value=SimpleNamespace(),
+        ),
+    )
+    with client as c:
+        r = c.post(
+            f"{settings.settings.api_base}/trades",
+            json={
+                "cycle_id": 1,
+                "exchange_id": 1,
+                "symbol": "BTCUSD",
+                "underlying_currency": "USD",
+                "trade_type": "LONG_SPOT",
+                "trade_strategy": "FX",
+                "quantity": 1,
+                "price_cents": 15,
+                "commission_cents": 100,
+                "trade_date": "2025-10-01",
+            },
+        )
+        assert r.status_code == 201
+
+
+def test_create_trade_invalid_trade_data(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory(
+        create_trade_service=MagicMock(side_effect=svc.InvalidTradeDataError("invalid trade data")),
+    )
+    with client as c:
+        r = c.post(
+            f"{settings.settings.api_base}/trades",
+            json={
+                "cycle_id": 1,
+                "exchange_id": 1,
+                "symbol": "BTCUSD",
+                "underlying_currency": "USD",
+                "trade_type": "LONG_SPOT",
+                "trade_strategy": "FX",
+                "quantity": 1,
+                "price_cents": 15,
+                "commission_cents": 100,
+                "trade_date": "2025-10-01",
+            },
+        )
+        assert r.status_code == status.HTTP_400_BAD_REQUEST
+        assert r.json() == {"detail": "invalid trade data"}
+
+
+def test_get_trade_by_id_success(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory(
+        get_trade_by_id_service=MagicMock(
+            return_value=SimpleNamespace(
+                id=1,
+                cycle_id=1,
+                exchange_id=1,
+                symbol="BTCUSD",
+                underlying_currency="USD",
+                trade_type="LONG_SPOT",
+                trade_strategy="FX",
+                quantity=1,
+                price_cents=1500,
+                commission_cents=100,
+                trade_date=datetime(2025, 10, 1, tzinfo=timezone.utc),
+            ),
+        ),
+    )
+    with client as c:
+        r = c.get(f"{settings.settings.api_base}/trades/1")
+        assert r.status_code == 200
+        assert r.json() == {
+            "id": 1,
+            "cycle_id": 1,
+            "exchange_id": 1,
+            "symbol": "BTCUSD",
+            "underlying_currency": "USD",
+            "trade_type": "LONG_SPOT",
+            "trade_strategy": "FX",
+            "quantity": 1,
+            "price_cents": 1500,
+            "commission_cents": 100,
+            "trade_date": "2025-10-01T00:00:00+00:00",
+        }
+
+
+def test_get_trade_by_id_not_found(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory(get_trade_by_id_service=MagicMock(side_effect=svc.TradeNotFoundError("trade not found")))
+    with client as c:
+        r = c.get(f"{settings.settings.api_base}/trades/999")
+        assert r.status_code == status.HTTP_404_NOT_FOUND
+        assert r.json() == {"detail": "trade not found"}
+
+
+def test_update_trade_friendly_name_success(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory(
+        update_trade_friendly_name_service=MagicMock(
+            return_value=SimpleNamespace(
+                id=1,
+                friendly_name="Updated Trade Name",
+            ),
+        ),
+    )
+    with client as c:
+        r = c.patch(f"{settings.settings.api_base}/trades/friendlyname", json={"id": 1, "friendly_name": "Updated Trade Name"})
+        assert r.status_code == 200
+        assert r.json() == {"id": 1, "friendly_name": "Updated Trade Name"}
+
+
+def test_update_trade_friendly_name_not_found(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory(update_trade_friendly_name_service=MagicMock(side_effect=svc.TradeNotFoundError("trade not found")))
+    with client as c:
+        r = c.patch(f"{settings.settings.api_base}/trades/friendlyname", json={"id": 999, "friendly_name": "NonExistent Trade"})
+        assert r.status_code == status.HTTP_404_NOT_FOUND
+        assert r.json() == {"detail": "trade not found"}
+
+
+def test_update_trade_note_success(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory(
+        update_trade_note_service=MagicMock(
+            return_value=SimpleNamespace(
+                id=1,
+                note="Updated trade note",
+            ),
+        ),
+    )
+    with client as c:
+        r = c.patch(f"{settings.settings.api_base}/trades/notes", json={"id": 1, "note": "Updated trade note"})
+        assert r.status_code == 200
+        assert r.json() == {"id": 1, "note": "Updated trade note"}
+
+
+def test_update_trade_note_not_found(client_factory: Callable[..., TestClient]) -> None:
+    client = client_factory(update_trade_note_service=MagicMock(side_effect=svc.TradeNotFoundError("trade not found")))
+    with client as c:
+        r = c.patch(f"{settings.settings.api_base}/trades/notes", json={"id": 999, "note": "NonExistent Trade Note"})
+        assert r.status_code == status.HTTP_404_NOT_FOUND
+        assert r.json() == {"detail": "trade not found"}

backend/tests/test_crud.py

@@ -137,6 +137,16 @@ def _ensure_utc_aware(dt: datetime | None) -> datetime | None:
     return dt.astimezone(timezone.utc)
 
 
+def _validate_timestamp(actual: datetime, expected: datetime, tolerance: timedelta) -> None:
+    actual_utc = _ensure_utc_aware(actual)
+    expected_utc = _ensure_utc_aware(expected)
+    assert actual_utc is not None
+    assert expected_utc is not None
+    delta = abs(actual_utc - expected_utc)
+    assert delta <= tolerance, f"Timestamps differ by {delta}, which exceeds tolerance of {tolerance}"
+
+
+# Trades
 def test_create_trade_success_with_cycle(session: Session) -> None:
     user_id = make_user(session)
     exchange_id = make_exchange(session, user_id)
@@ -172,6 +182,51 @@ def test_create_trade_success_with_cycle(session: Session) -> None:
     assert actual_trade.trade_type == trade_data["trade_type"]
     assert actual_trade.trade_strategy == trade_data["trade_strategy"]
     assert actual_trade.quantity == trade_data["quantity"]
+    assert actual_trade.quantity_multiplier == 1
+    assert actual_trade.price_cents == trade_data["price_cents"]
+    assert actual_trade.gross_cash_flow_cents == trade_data["gross_cash_flow_cents"]
+    assert actual_trade.commission_cents == trade_data["commission_cents"]
+    assert actual_trade.net_cash_flow_cents == trade_data["net_cash_flow_cents"]
+    assert actual_trade.cycle_id == trade_data["cycle_id"]
+
+
+def test_create_trade_with_custom_multipler(session: Session) -> None:
+    user_id = make_user(session)
+    exchange_id = make_exchange(session, user_id)
+    cycle_id = make_cycle(session, user_id, exchange_id)
+
+    trade_data = {
+        "user_id": user_id,
+        "friendly_name": "Test Trade with Multiplier",
+        "symbol": "AAPL",
+        "underlying_currency": models.UnderlyingCurrency.USD,
+        "trade_type": models.TradeType.LONG_SPOT,
+        "trade_strategy": models.TradeStrategy.SPOT,
+        "trade_time_utc": datetime.now(timezone.utc),
+        "quantity": 10,
+        "quantity_multiplier": 100,
+        "price_cents": 15000,
+        "gross_cash_flow_cents": -1500000,
+        "commission_cents": 50000,
+        "net_cash_flow_cents": -1550000,
+        "cycle_id": cycle_id,
+    }
+
+    trade = crud.create_trade(session, trade_data)
+    assert trade.id is not None
+    assert trade.user_id == user_id
+    assert trade.cycle_id == cycle_id
+    session.refresh(trade)
+
+    actual_trade = session.get(models.Trades, trade.id)
+    assert actual_trade is not None
+    assert actual_trade.friendly_name == trade_data["friendly_name"]
+    assert actual_trade.symbol == trade_data["symbol"]
+    assert actual_trade.underlying_currency == trade_data["underlying_currency"]
+    assert actual_trade.trade_type == trade_data["trade_type"]
+    assert actual_trade.trade_strategy == trade_data["trade_strategy"]
+    assert actual_trade.quantity == trade_data["quantity"]
+    assert actual_trade.quantity_multiplier == trade_data["quantity_multiplier"]
     assert actual_trade.price_cents == trade_data["price_cents"]
     assert actual_trade.gross_cash_flow_cents == trade_data["gross_cash_flow_cents"]
     assert actual_trade.commission_cents == trade_data["commission_cents"]
@@ -194,6 +249,9 @@ def test_create_trade_with_auto_created_cycle(session: Session) -> None:
         "trade_time_utc": datetime.now(timezone.utc),
         "quantity": 5,
         "price_cents": 15500,
+        "gross_cash_flow_cents": -77500,
+        "commission_cents": 300,
+        "net_cash_flow_cents": -77800,
     }
 
     trade = crud.create_trade(session, trade_data)
@@ -405,6 +463,24 @@ def test_get_trades_by_user_id(session: Session) -> None:
     assert friendly_names == {"Trade One", "Trade Two"}
 
 
+def test_update_trade_friendly_name(session: Session) -> None:
+    user_id = make_user(session)
+    exchange_id = make_exchange(session, user_id)
+    cycle_id = make_cycle(session, user_id, exchange_id)
+    trade_id = make_trade(session, user_id, cycle_id)
+
+    new_friendly_name = "Updated Trade Name"
+    updated_trade = crud.update_trade_friendly_name(session, trade_id, new_friendly_name)
+    assert updated_trade is not None
+    assert updated_trade.id == trade_id
+    assert updated_trade.friendly_name == new_friendly_name
+
+    session.refresh(updated_trade)
+    actual_trade = session.get(models.Trades, trade_id)
+    assert actual_trade is not None
+    assert actual_trade.friendly_name == new_friendly_name
+
+
 def test_update_trade_note(session: Session) -> None:
     user_id = make_user(session)
     exchange_id = make_exchange(session, user_id)
@@ -457,6 +533,9 @@ def test_replace_trade(session: Session) -> None:
         "trade_time_utc": datetime.now(timezone.utc),
         "quantity": 20,
         "price_cents": 25000,
+        "gross_cash_flow_cents": -500000,
+        "commission_cents": 1000,
+        "net_cash_flow_cents": -501000,
     }
 
     new_trade = crud.replace_trade(session, old_trade_id, new_trade_data)
@@ -485,6 +564,7 @@ def test_replace_trade(session: Session) -> None:
     assert actual_new_trade.replaced_by_trade_id == old_trade_id
 
 
+# Cycles
 def test_create_cycle(session: Session) -> None:
     user_id = make_user(session)
     exchange_id = make_exchange(session, user_id)
@@ -516,6 +596,31 @@ def test_create_cycle(session: Session) -> None:
     assert actual_cycle.start_date == cycle_data["start_date"]
 
 
+def test_get_cycle_by_id(session: Session) -> None:
+    user_id = make_user(session)
+    exchange_id = make_exchange(session, user_id)
+    cycle_id = make_cycle(session, user_id, exchange_id, friendly_name="Cycle to Get")
+    cycle = crud.get_cycle_by_id(session, cycle_id)
+    assert cycle is not None
+    assert cycle.id == cycle_id
+    assert cycle.friendly_name == "Cycle to Get"
+    assert cycle.user_id == user_id
+
+
+def test_get_cycles_by_user_id(session: Session) -> None:
+    user_id = make_user(session)
+    exchange_id = make_exchange(session, user_id)
+    cycle_names = ["Cycle One", "Cycle Two", "Cycle Three"]
+    for name in cycle_names:
+        make_cycle(session, user_id, exchange_id, friendly_name=name)
+
+    cycles = crud.get_cycles_by_user_id(session, user_id)
+    assert len(cycles) == len(cycle_names)
+    fetched_names = {cycle.friendly_name for cycle in cycles}
+    for name in cycle_names:
+        assert name in fetched_names
+
+
 def test_update_cycle(session: Session) -> None:
     user_id = make_user(session)
     exchange_id = make_exchange(session, user_id)
@@ -562,6 +667,216 @@ def test_update_cycle_immutable_fields(session: Session) -> None:
     )
 
 
+# Cycle loans
+def test_create_cycle_loan_event(session: Session) -> None:
+    user_id = make_user(session)
+    exchange_id = make_exchange(session, user_id)
+    cycle_id = make_cycle(session, user_id, exchange_id)
+
+    loan_data = {
+        "cycle_id": cycle_id,
+        "loan_amount_cents": 100000,
+        "loan_interest_rate_tenth_bps": 5000,  # 5%
+        "notes": "Test loan change for the cycle",
+    }
+
+    loan_event = crud.create_cycle_loan_event(session, loan_data)
+    now = datetime.now(timezone.utc)
+    assert loan_event.id is not None
+    assert loan_event.cycle_id == cycle_id
+    assert loan_event.loan_amount_cents == loan_data["loan_amount_cents"]
+    assert loan_event.loan_interest_rate_tenth_bps == loan_data["loan_interest_rate_tenth_bps"]
+    assert loan_event.notes == loan_data["notes"]
+    assert loan_event.effective_date == now.date()
+    _validate_timestamp(loan_event.created_at, now, timedelta(seconds=1))
+
+    session.refresh(loan_event)
+    actual_loan_event = session.get(models.CycleLoanChangeEvents, loan_event.id)
+    assert actual_loan_event is not None
+    assert actual_loan_event.cycle_id == cycle_id
+    assert actual_loan_event.loan_amount_cents == loan_data["loan_amount_cents"]
+    assert actual_loan_event.loan_interest_rate_tenth_bps == loan_data["loan_interest_rate_tenth_bps"]
+    assert actual_loan_event.notes == loan_data["notes"]
+    assert actual_loan_event.effective_date == now.date()
+    _validate_timestamp(actual_loan_event.created_at, now, timedelta(seconds=1))
+
+
+def test_get_cycle_loan_events_by_cycle_id(session: Session) -> None:
+    user_id = make_user(session)
+    exchange_id = make_exchange(session, user_id)
+    cycle_id = make_cycle(session, user_id, exchange_id)
+
+    loan_data_1 = {
+        "cycle_id": cycle_id,
+        "loan_amount_cents": 100000,
+        "loan_interest_rate_tenth_bps": 5000,
+        "notes": "First loan event",
+    }
+    yesterday = (datetime.now(timezone.utc) - timedelta(days=1)).date()
+    loan_data_2 = {
+        "cycle_id": cycle_id,
+        "loan_amount_cents": 150000,
+        "loan_interest_rate_tenth_bps": 4500,
+        "effective_date": yesterday,
+        "notes": "Second loan event",
+    }
+
+    crud.create_cycle_loan_event(session, loan_data_1)
+    crud.create_cycle_loan_event(session, loan_data_2)
+
+    loan_events = crud.get_loan_events_by_cycle_id(session, cycle_id)
+    assert len(loan_events) == 2
+    notes = [event.notes for event in loan_events]
+    assert loan_events[0].notes == loan_data_2["notes"]
+    assert loan_events[0].effective_date == yesterday
+    assert notes == ["Second loan event", "First loan event"]  # Ordered by effective_date desc
+
+
+def test_get_cycle_loan_events_by_cycle_id_same_date(session: Session) -> None:
+    user_id = make_user(session)
+    exchange_id = make_exchange(session, user_id)
+    cycle_id = make_cycle(session, user_id, exchange_id)
+
+    loan_data_1 = {
+        "cycle_id": cycle_id,
+        "loan_amount_cents": 100000,
+        "loan_interest_rate_tenth_bps": 5000,
+        "notes": "First loan event",
+    }
+    loan_data_2 = {
+        "cycle_id": cycle_id,
+        "loan_amount_cents": 150000,
+        "loan_interest_rate_tenth_bps": 4500,
+        "notes": "Second loan event",
+    }
+
+    crud.create_cycle_loan_event(session, loan_data_1)
+    crud.create_cycle_loan_event(session, loan_data_2)
+
+    loan_events = crud.get_loan_events_by_cycle_id(session, cycle_id)
+    assert len(loan_events) == 2
+    notes = [event.notes for event in loan_events]
+    assert notes == ["First loan event", "Second loan event"]  # Ordered by id desc when effective_date is same
+
+
+def test_create_cycle_loan_event_single_field(session: Session) -> None:
+    user_id = make_user(session)
+    exchange_id = make_exchange(session, user_id)
+    cycle_id = make_cycle(session, user_id, exchange_id)
+
+    loan_data = {
+        "cycle_id": cycle_id,
+        "loan_amount_cents": 200000,
+    }
+
+    loan_event = crud.create_cycle_loan_event(session, loan_data)
+    now = datetime.now(timezone.utc)
+    assert loan_event.id is not None
+    assert loan_event.cycle_id == cycle_id
+    assert loan_event.loan_amount_cents == loan_data["loan_amount_cents"]
+    assert loan_event.loan_interest_rate_tenth_bps is None
+    assert loan_event.notes is None
+    assert loan_event.effective_date == now.date()
+    _validate_timestamp(loan_event.created_at, now, timedelta(seconds=1))
+
+    session.refresh(loan_event)
+    actual_loan_event = session.get(models.CycleLoanChangeEvents, loan_event.id)
+    assert actual_loan_event is not None
+    assert actual_loan_event.cycle_id == cycle_id
+    assert actual_loan_event.loan_amount_cents == loan_data["loan_amount_cents"]
+    assert actual_loan_event.loan_interest_rate_tenth_bps is None
+    assert actual_loan_event.notes is None
+    assert actual_loan_event.effective_date == now.date()
+    _validate_timestamp(actual_loan_event.created_at, now, timedelta(seconds=1))
+
+
+def test_create_cycle_daily_accrual(session: Session) -> None:
+    user_id = make_user(session)
+    exchange_id = make_exchange(session, user_id)
+    cycle_id = make_cycle(session, user_id, exchange_id)
+    today = datetime.now(timezone.utc).date()
+    accrual_data = {
+        "cycle_id": cycle_id,
+        "accrual_date": today,
+        "accrued_interest_cents": 150,
+        "notes": "Daily interest accrual",
+    }
+
+    accrual = crud.create_cycle_daily_accrual(session, cycle_id, accrual_data["accrual_date"], accrual_data["accrued_interest_cents"])
+    assert accrual.id is not None
+    assert accrual.cycle_id == cycle_id
+    assert accrual.accrual_date == accrual_data["accrual_date"]
+    assert accrual.accrual_amount_cents == accrual_data["accrued_interest_cents"]
+
+    session.refresh(accrual)
+    actual_accrual = session.get(models.CycleDailyAccrual, accrual.id)
+    assert actual_accrual is not None
+    assert actual_accrual.cycle_id == cycle_id
+    assert actual_accrual.accrual_date == accrual_data["accrual_date"]
+    assert actual_accrual.accrual_amount_cents == accrual_data["accrued_interest_cents"]
+
+
+def test_get_cycle_daily_accruals_by_cycle_id(session: Session) -> None:
+    user_id = make_user(session)
+    exchange_id = make_exchange(session, user_id)
+    cycle_id = make_cycle(session, user_id, exchange_id)
+
+    today = datetime.now(timezone.utc).date()
+    yesterday = today - timedelta(days=1)
+
+    accrual_data_1 = {
+        "cycle_id": cycle_id,
+        "accrual_date": yesterday,
+        "accrued_interest_cents": 100,
+    }
+    accrual_data_2 = {
+        "cycle_id": cycle_id,
+        "accrual_date": today,
+        "accrued_interest_cents": 150,
+    }
+
+    crud.create_cycle_daily_accrual(session, cycle_id, accrual_data_1["accrual_date"], accrual_data_1["accrued_interest_cents"])
+    crud.create_cycle_daily_accrual(session, cycle_id, accrual_data_2["accrual_date"], accrual_data_2["accrued_interest_cents"])
+
+    accruals = crud.get_cycle_daily_accruals_by_cycle_id(session, cycle_id)
+    assert len(accruals) == 2
+    dates = [accrual.accrual_date for accrual in accruals]
+    assert dates == [yesterday, today]  # Ordered by accrual_date asc
+
+
+def test_get_cycle_daily_accruals_by_cycle_id_and_date(session: Session) -> None:
+    user_id = make_user(session)
+    exchange_id = make_exchange(session, user_id)
+    cycle_id = make_cycle(session, user_id, exchange_id)
+
+    today = datetime.now(timezone.utc).date()
+    yesterday = today - timedelta(days=1)
+
+    accrual_data_1 = {
+        "cycle_id": cycle_id,
+        "accrual_date": yesterday,
+        "accrued_interest_cents": 100,
+    }
+    accrual_data_2 = {
+        "cycle_id": cycle_id,
+        "accrual_date": today,
+        "accrued_interest_cents": 150,
+    }
+
+    crud.create_cycle_daily_accrual(session, cycle_id, accrual_data_1["accrual_date"], accrual_data_1["accrued_interest_cents"])
+    crud.create_cycle_daily_accrual(session, cycle_id, accrual_data_2["accrual_date"], accrual_data_2["accrued_interest_cents"])
+
+    accruals_today = crud.get_cycle_daily_accrual_by_cycle_id_and_date(session, cycle_id, today)
+    assert accruals_today is not None
+    assert accruals_today.accrual_date == today
+    assert accruals_today.accrual_amount_cents == accrual_data_2["accrued_interest_cents"]
+
+    accruals_yesterday = crud.get_cycle_daily_accrual_by_cycle_id_and_date(session, cycle_id, yesterday)
+    assert accruals_yesterday is not None
+    assert accruals_yesterday.accrual_date == yesterday
+    assert accruals_yesterday.accrual_amount_cents == accrual_data_1["accrued_interest_cents"]
+
+
 # Exchanges
 def test_create_exchange(session: Session) -> None:
     user_id = make_user(session)

backend/tests/test_db_migration.py

@@ -42,9 +42,28 @@ def test_run_migrations_0_to_1(monkeypatch: pytest.MonkeyPatch) -> None:
                 "funding_source": ("TEXT", 0, 0),
                 "capital_exposure_cents": ("INTEGER", 0, 0),
                 "loan_amount_cents": ("INTEGER", 0, 0),
-                "loan_interest_rate_bps": ("INTEGER", 0, 0),
+                "loan_interest_rate_tenth_bps": ("INTEGER", 0, 0),
                 "start_date": ("DATE", 1, 0),
                 "end_date": ("DATE", 0, 0),
+                "latest_interest_accrued_date": ("DATE", 0, 0),
+                "total_accrued_amount_cents": ("INTEGER", 1, 0),
+            },
+            "cycle_loan_change_events": {
+                "id": ("INTEGER", 1, 1),
+                "cycle_id": ("INTEGER", 1, 0),
+                "effective_date": ("DATE", 1, 0),
+                "loan_amount_cents": ("INTEGER", 0, 0),
+                "loan_interest_rate_tenth_bps": ("INTEGER", 0, 0),
+                "related_trade_id": ("INTEGER", 0, 0),
+                "notes": ("TEXT", 0, 0),
+                "created_at": ("DATETIME", 1, 0),
+            },
+            "cycle_daily_accrual": {
+                "id": ("INTEGER", 1, 1),
+                "cycle_id": ("INTEGER", 1, 0),
+                "accrual_date": ("DATE", 1, 0),
+                "accrual_amount_cents": ("INTEGER", 1, 0),
+                "created_at": ("DATETIME", 1, 0),
             },
             "trades": {
                 "id": ("INTEGER", 1, 1),
@@ -60,6 +79,7 @@ def test_run_migrations_0_to_1(monkeypatch: pytest.MonkeyPatch) -> None:
                 "expiry_date": ("DATE", 0, 0),
                 "strike_price_cents": ("INTEGER", 0, 0),
                 "quantity": ("INTEGER", 1, 0),
+                "quantity_multiplier": ("INTEGER", 1, 0),
                 "price_cents": ("INTEGER", 1, 0),
                 "gross_cash_flow_cents": ("INTEGER", 1, 0),
                 "commission_cents": ("INTEGER", 1, 0),
@@ -99,6 +119,13 @@ def test_run_migrations_0_to_1(monkeypatch: pytest.MonkeyPatch) -> None:
                 {"table": "users", "from": "user_id", "to": "id"},
                 {"table": "exchanges", "from": "exchange_id", "to": "id"},
             ],
+            "cycle_loan_change_events": [
+                {"table": "cycles", "from": "cycle_id", "to": "id"},
+                {"table": "trades", "from": "related_trade_id", "to": "id"},
+            ],
+            "cycle_daily_accrual": [
+                {"table": "cycles", "from": "cycle_id", "to": "id"},
+            ],
             "sessions": [
                 {"table": "users", "from": "user_id", "to": "id"},
             ],
@@ -145,6 +172,39 @@ def test_run_migrations_0_to_1(monkeypatch: pytest.MonkeyPatch) -> None:
                 actual_fk_list = [{"table": r[2], "from": r[3], "to": r[4]} for r in fk_rows]
                 for efk in fks:
                     assert efk in actual_fk_list, f"missing FK on {tbl_name}: {efk}"
+
+            # check trades.replaced_by_trade_id self-referential FK
+            fk_rows = conn.execute(text("PRAGMA foreign_key_list('trades')")).fetchall()
+            actual_fk_list = [{"table": r[2], "from": r[3], "to": r[4]} for r in fk_rows]
+            assert {"table": "trades", "from": "replaced_by_trade_id", "to": "id"} in actual_fk_list, (
+                "missing self FK trades.replaced_by_trade_id -> trades.id"
+            )
+
+            # helper to find unique index on a column
+            def has_unique_index(table: str, column: str) -> bool:
+                idx_rows = conn.execute(text(f"PRAGMA index_list('{table}')")).fetchall()
+                for idx in idx_rows:
+                    idx_name = idx[1]
+                    is_unique = bool(idx[2])
+                    if not is_unique:
+                        continue
+                    info = conn.execute(text(f"PRAGMA index_info('{idx_name}')")).fetchall()
+                    cols = [r[2] for r in info]
+                    if column in cols:
+                        return True
+                return False
+
+            assert has_unique_index("trades", "friendly_name"), (
+                "expected unique index on trades(friendly_name) per uq_trades_user_friendly_name"
+            )
+            assert has_unique_index("cycles", "friendly_name"), (
+                "expected unique index on cycles(friendly_name) per uq_cycles_user_friendly_name"
+            )
+            assert has_unique_index("exchanges", "name"), "expected unique index on exchanges(name) per uq_exchanges_user_name"
+            assert has_unique_index("sessions", "session_token_hash"), "expected unique index on sessions(session_token_hash)"
+            assert has_unique_index("cycle_loan_change_events", "related_trade_id"), (
+                "expected unique index on cycle_loan_change_events(related_trade_id)"
+            )
     finally:
         engine.dispose()
         SQLModel.metadata.clear()

backend/trading_journal/crud.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from datetime import datetime, timedelta, timezone
+from datetime import date, datetime, timedelta, timezone
 from typing import TYPE_CHECKING, Any, TypeVar, cast
 
 from pydantic import BaseModel
@@ -13,6 +13,8 @@ if TYPE_CHECKING:
     from collections.abc import Mapping
     from enum import Enum
 
+    from sqlalchemy.sql.elements import ColumnElement
+
 
 # Generic enum member type
 T = TypeVar("T", bound="Enum")
@@ -90,13 +92,10 @@ def create_trade(session: Session, trade_data: Mapping[str, Any] | BaseModel) ->
         raise ValueError("price_cents is required")
     if "commission_cents" not in payload:
         payload["commission_cents"] = 0
-    quantity: int = payload["quantity"]
-    price_cents: int = payload["price_cents"]
-    commission_cents: int = payload["commission_cents"]
     if "gross_cash_flow_cents" not in payload:
-        payload["gross_cash_flow_cents"] = -quantity * price_cents
+        raise ValueError("gross_cash_flow_cents is required")
     if "net_cash_flow_cents" not in payload:
-        payload["net_cash_flow_cents"] = payload["gross_cash_flow_cents"] - commission_cents
+        raise ValueError("net_cash_flow_cents is required")
 
     # If no cycle_id provided, create Cycle instance but don't call create_cycle()
     created_cycle = None
@@ -163,6 +162,21 @@ def get_trades_by_user_id(session: Session, user_id: int) -> list[models.Trades]
     return list(session.exec(statement).all())
 
 
+def update_trade_friendly_name(session: Session, trade_id: int, friendly_name: str) -> models.Trades:
+    trade: models.Trades | None = session.get(models.Trades, trade_id)
+    if trade is None:
+        raise ValueError("trade_id does not exist")
+    trade.friendly_name = friendly_name
+    session.add(trade)
+    try:
+        session.flush()
+    except IntegrityError as e:
+        session.rollback()
+        raise ValueError("update_trade_friendly_name integrity error") from e
+    session.refresh(trade)
+    return trade
+
+
 def update_trade_note(session: Session, trade_id: int, note: str) -> models.Trades:
     trade: models.Trades | None = session.get(models.Trades, trade_id)
     if trade is None:
@@ -240,7 +254,18 @@ def create_cycle(session: Session, cycle_data: Mapping[str, Any] | BaseModel) ->
     return c
 
 
-IMMUTABLE_CYCLE_FIELDS = {"id", "user_id", "start_date", "created_at"}
+IMMUTABLE_CYCLE_FIELDS = {"id", "user_id", "start_date"}
+
+
+def get_cycle_by_id(session: Session, cycle_id: int) -> models.Cycles | None:
+    return session.get(models.Cycles, cycle_id)
+
+
+def get_cycles_by_user_id(session: Session, user_id: int) -> list[models.Cycles]:
+    statement = select(models.Cycles).where(
+        models.Cycles.user_id == user_id,
+    )
+    return list(session.exec(statement).all())
 
 
 def update_cycle(session: Session, cycle_id: int, update_data: Mapping[str, Any] | BaseModel) -> models.Cycles:
@@ -278,6 +303,93 @@ def update_cycle(session: Session, cycle_id: int, update_data: Mapping[str, Any]
     return cycle
 
 
+# Cycle loan and interest
+def create_cycle_loan_event(session: Session, loan_data: Mapping[str, Any] | BaseModel) -> models.CycleLoanChangeEvents:
+    data = _data_to_dict(loan_data)
+    allowed = _allowed_columns(models.CycleLoanChangeEvents)
+    payload = {k: v for k, v in data.items() if k in allowed}
+    if "cycle_id" not in payload:
+        raise ValueError("cycle_id is required")
+    cycle = session.get(models.Cycles, payload["cycle_id"])
+    if cycle is None:
+        raise ValueError("cycle_id does not exist")
+
+    payload["effective_date"] = payload.get("effective_date") or datetime.now(timezone.utc).date()
+    payload["created_at"] = datetime.now(timezone.utc)
+    cle = models.CycleLoanChangeEvents(**payload)
+    session.add(cle)
+    try:
+        session.flush()
+    except IntegrityError as e:
+        session.rollback()
+        raise ValueError("create_cycle_loan_event integrity error") from e
+    session.refresh(cle)
+    return cle
+
+
+def get_loan_events_by_cycle_id(session: Session, cycle_id: int) -> list[models.CycleLoanChangeEvents]:
+    eff_col = cast("ColumnElement", models.CycleLoanChangeEvents.effective_date)
+    id_col = cast("ColumnElement", models.CycleLoanChangeEvents.id)
+    statement = (
+        select(models.CycleLoanChangeEvents)
+        .where(
+            models.CycleLoanChangeEvents.cycle_id == cycle_id,
+        )
+        .order_by(eff_col, id_col.asc())
+    )
+    return list(session.exec(statement).all())
+
+
+def create_cycle_daily_accrual(session: Session, cycle_id: int, accrual_date: date, accrual_amount_cents: int) -> models.CycleDailyAccrual:
+    cycle = session.get(models.Cycles, cycle_id)
+    if cycle is None:
+        raise ValueError("cycle_id does not exist")
+    existing = session.exec(
+        select(models.CycleDailyAccrual).where(
+            models.CycleDailyAccrual.cycle_id == cycle_id,
+            models.CycleDailyAccrual.accrual_date == accrual_date,
+        ),
+    ).first()
+    if existing:
+        return existing
+    if accrual_amount_cents < 0:
+        raise ValueError("accrual_amount_cents must be non-negative")
+    row = models.CycleDailyAccrual(
+        cycle_id=cycle_id,
+        accrual_date=accrual_date,
+        accrual_amount_cents=accrual_amount_cents,
+        created_at=datetime.now(timezone.utc),
+    )
+    session.add(row)
+    try:
+        session.flush()
+    except IntegrityError as e:
+        session.rollback()
+        raise ValueError("create_cycle_daily_accrual integrity error") from e
+    session.refresh(row)
+    return row
+
+
+def get_cycle_daily_accruals_by_cycle_id(session: Session, cycle_id: int) -> list[models.CycleDailyAccrual]:
+    date_col = cast("ColumnElement", models.CycleDailyAccrual.accrual_date)
+    statement = (
+        select(models.CycleDailyAccrual)
+        .where(
+            models.CycleDailyAccrual.cycle_id == cycle_id,
+        )
+        .order_by(date_col.asc())
+    )
+    return list(session.exec(statement).all())
+
+
+def get_cycle_daily_accrual_by_cycle_id_and_date(session: Session, cycle_id: int, accrual_date: date) -> models.CycleDailyAccrual | None:
+    statement = select(models.CycleDailyAccrual).where(
+        models.CycleDailyAccrual.cycle_id == cycle_id,
+        models.CycleDailyAccrual.accrual_date == accrual_date,
+    )
+    return session.exec(statement).first()
+
+
 # Exchanges
 IMMUTABLE_EXCHANGE_FIELDS = {"id"}
 

backend/trading_journal/db_migration.py

@@ -28,6 +28,8 @@ def _mig_0_1(engine: Engine) -> None:
             models_v1.Users.__table__,  # type: ignore[attr-defined]
             models_v1.Sessions.__table__,  # type: ignore[attr-defined]
             models_v1.Exchanges.__table__,  # type: ignore[attr-defined]
+            models_v1.CycleLoanChangeEvents.__table__,  # type: ignore[attr-defined]
+            models_v1.CycleDailyAccrual.__table__,  # type: ignore[attr-defined]
         ],
     )
 

backend/trading_journal/dto.py

@@ -1,55 +1,11 @@
 from __future__ import annotations
 
 from datetime import date, datetime  # noqa: TC003
-from typing import TYPE_CHECKING
 
 from pydantic import BaseModel
 from sqlmodel import SQLModel
 
-if TYPE_CHECKING:
-    from trading_journal.models import TradeStrategy, TradeType, UnderlyingCurrency
-
-
-class ExchangesBase(SQLModel):
-    name: str
-    notes: str | None = None
-
-
-class ExchangesCreate(ExchangesBase):
-    user_id: int
-
-
-class TradeBase(SQLModel):
-    user_id: int
-    friendly_name: str | None
-    symbol: str
-    exchange: str
-    underlying_currency: UnderlyingCurrency
-    trade_type: TradeType
-    trade_strategy: TradeStrategy
-    trade_date: date
-    trade_time_utc: datetime
-    quantity: int
-    price_cents: int
-    gross_cash_flow_cents: int
-    commission_cents: int
-    net_cash_flow_cents: int
-    notes: str | None
-    cycle_id: int | None = None
-
-
-class TradeCreate(TradeBase):
-    expiry_date: date | None = None
-    strike_price_cents: int | None = None
-    is_invalidated: bool = False
-    invalidated_at: datetime | None = None
-    replaced_by_trade_id: int | None = None
-
-
-class TradeRead(TradeBase):
-    id: int
-    is_invalidated: bool
-    invalidated_at: datetime | None
+from trading_journal.models import TradeStrategy, TradeType, UnderlyingCurrency  # noqa: TC001
 
 
 class UserBase(SQLModel):
@@ -91,3 +47,90 @@ class SessionsUpdate(SQLModel):
     last_seen_at: datetime | None = None
     last_used_ip: str | None = None
     user_agent: str | None = None
+
+
+class ExchangesBase(SQLModel):
+    name: str
+    notes: str | None = None
+
+
+class ExchangesCreate(ExchangesBase):
+    user_id: int
+
+
+class ExchangesRead(ExchangesBase):
+    id: int
+
+
+class CycleBase(SQLModel):
+    friendly_name: str | None = None
+    status: str
+    end_date: date | None = None
+    funding_source: str | None = None
+    capital_exposure_cents: int | None = None
+    loan_amount_cents: int | None = None
+    loan_interest_rate_tenth_bps: int | None = None
+    trades: list[TradeRead] | None = None
+    exchange: ExchangesRead | None = None
+
+
+class CycleCreate(CycleBase):
+    user_id: int
+    symbol: str
+    exchange_id: int
+    underlying_currency: UnderlyingCurrency
+    start_date: date
+
+
+class CycleUpdate(CycleBase):
+    id: int
+
+
+class CycleRead(CycleCreate):
+    id: int
+
+
+class TradeBase(SQLModel):
+    friendly_name: str | None = None
+    symbol: str
+    exchange_id: int
+    underlying_currency: UnderlyingCurrency
+    trade_type: TradeType
+    trade_strategy: TradeStrategy
+    trade_date: date
+    quantity: int
+    price_cents: int
+    commission_cents: int
+    notes: str | None = None
+    cycle_id: int | None = None
+
+
+class TradeCreate(TradeBase):
+    user_id: int | None = None
+    trade_time_utc: datetime | None = None
+    gross_cash_flow_cents: int | None = None
+    net_cash_flow_cents: int | None = None
+    quantity_multiplier: int = 1
+    expiry_date: date | None = None
+    strike_price_cents: int | None = None
+    is_invalidated: bool = False
+    invalidated_at: datetime | None = None
+    replaced_by_trade_id: int | None = None
+
+
+class TradeNoteUpdate(BaseModel):
+    id: int
+    notes: str | None = None
+
+
+class TradeFriendlyNameUpdate(BaseModel):
+    id: int
+    friendly_name: str
+
+
+class TradeRead(TradeCreate):
+    id: int
+
+
+SessionsCreate.model_rebuild()
+CycleBase.model_rebuild()

backend/trading_journal/models.py

@@ -1,11 +1,13 @@
 from datetime import date, datetime
 from enum import Enum
+from typing import Optional
 
 from sqlmodel import (
     Column,
     Date,
     DateTime,
     Field,
+    ForeignKey,
     Integer,
     Relationship,
     SQLModel,
@@ -16,8 +18,10 @@ from sqlmodel import (
 
 class TradeType(str, Enum):
     SELL_PUT = "SELL_PUT"
+    CLOSE_SELL_PUT = "CLOSE_SELL_PUT"
     ASSIGNMENT = "ASSIGNMENT"
     SELL_CALL = "SELL_CALL"
+    CLOSE_SELL_CALL = "CLOSE_SELL_CALL"
     EXERCISE_CALL = "EXERCISE_CALL"
     LONG_SPOT = "LONG_SPOT"
     CLOSE_LONG_SPOT = "CLOSE_LONG_SPOT"
@@ -82,6 +86,7 @@ class Trades(SQLModel, table=True):
     expiry_date: date | None = Field(default=None, nullable=True)
     strike_price_cents: int | None = Field(default=None, nullable=True)
     quantity: int = Field(sa_column=Column(Integer, nullable=False))
+    quantity_multiplier: int = Field(sa_column=Column(Integer, nullable=False), default=1)
     price_cents: int = Field(sa_column=Column(Integer, nullable=False))
     gross_cash_flow_cents: int = Field(sa_column=Column(Integer, nullable=False))
     commission_cents: int = Field(sa_column=Column(Integer, nullable=False))
@@ -91,8 +96,14 @@ class Trades(SQLModel, table=True):
     replaced_by_trade_id: int | None = Field(default=None, foreign_key="trades.id", nullable=True)
     notes: str | None = Field(default=None, sa_column=Column(Text, nullable=True))
     cycle_id: int | None = Field(default=None, foreign_key="cycles.id", nullable=True, index=True)
+
     cycle: "Cycles" = Relationship(back_populates="trades")
 
+    related_loan_change_event: Optional["CycleLoanChangeEvents"] = Relationship(
+        back_populates="trade",
+        sa_relationship_kwargs={"uselist": False},
+    )
+
 
 class Cycles(SQLModel, table=True):
     __tablename__ = "cycles"  # type: ignore[attr-defined]
@@ -108,12 +119,48 @@ class Cycles(SQLModel, table=True):
     status: CycleStatus = Field(sa_column=Column(Text, nullable=False))
     funding_source: FundingSource = Field(sa_column=Column(Text, nullable=True))
     capital_exposure_cents: int | None = Field(default=None, nullable=True)
-    loan_amount_cents: int | None = Field(default=None, nullable=True)
-    loan_interest_rate_bps: int | None = Field(default=None, nullable=True)
     start_date: date = Field(sa_column=Column(Date, nullable=False))
     end_date: date | None = Field(default=None, sa_column=Column(Date, nullable=True))
+
     trades: list["Trades"] = Relationship(back_populates="cycle")
 
+    loan_amount_cents: int | None = Field(default=None, nullable=True)
+    loan_interest_rate_tenth_bps: int | None = Field(default=None, nullable=True)
+
+    latest_interest_accrued_date: date | None = Field(default=None, sa_column=Column(Date, nullable=True))
+    total_accrued_amount_cents: int = Field(default=0, sa_column=Column(Integer, nullable=False))
+
+    loan_change_events: list["CycleLoanChangeEvents"] = Relationship(back_populates="cycle")
+    daily_accruals: list["CycleDailyAccrual"] = Relationship(back_populates="cycle")
+
+
+class CycleLoanChangeEvents(SQLModel, table=True):
+    __tablename__ = "cycle_loan_change_events"  # type: ignore[attr-defined]
+    id: int | None = Field(default=None, primary_key=True)
+    cycle_id: int = Field(sa_column=Column(Integer, ForeignKey("cycles.id", ondelete="CASCADE"), nullable=False, index=True))
+    effective_date: date = Field(sa_column=Column(Date, nullable=False))
+    loan_amount_cents: int | None = Field(default=None, sa_column=Column(Integer, nullable=True))
+    loan_interest_rate_tenth_bps: int | None = Field(default=None, sa_column=Column(Integer, nullable=True))
+    related_trade_id: int | None = Field(default=None, sa_column=Column(Integer, ForeignKey("trades.id"), nullable=True, unique=True))
+    notes: str | None = Field(default=None, sa_column=Column(Text, nullable=True))
+    created_at: datetime = Field(sa_column=Column(DateTime(timezone=True), nullable=False))
+
+    cycle: "Cycles" = Relationship(back_populates="loan_change_events")
+    trade: Optional["Trades"] = Relationship(back_populates="related_loan_change_event")
+
+
+class CycleDailyAccrual(SQLModel, table=True):
+    __tablename__ = "cycle_daily_accrual"  # type: ignore[attr-defined]
+    __table_args__ = (UniqueConstraint("cycle_id", "accrual_date", name="uq_cycle_daily_accruals_cycle_date"),)
+
+    id: int | None = Field(default=None, primary_key=True)
+    cycle_id: int = Field(sa_column=Column(Integer, ForeignKey("cycles.id", ondelete="CASCADE"), nullable=False, index=True))
+    accrual_date: date = Field(sa_column=Column(Date, nullable=False))
+    accrual_amount_cents: int = Field(sa_column=Column(Integer, nullable=False))
+    created_at: datetime = Field(sa_column=Column(DateTime(timezone=True), nullable=False))
+
+    cycle: "Cycles" = Relationship(back_populates="daily_accruals")
+
 
 class Exchanges(SQLModel, table=True):
     __tablename__ = "exchanges"  # type: ignore[attr-defined]

backend/trading_journal/models_v1.py

@@ -1,11 +1,13 @@
 from datetime import date, datetime
 from enum import Enum
+from typing import Optional
 
 from sqlmodel import (
     Column,
     Date,
     DateTime,
     Field,
+    ForeignKey,
     Integer,
     Relationship,
     SQLModel,
@@ -16,8 +18,10 @@ from sqlmodel import (
 
 class TradeType(str, Enum):
     SELL_PUT = "SELL_PUT"
+    CLOSE_SELL_PUT = "CLOSE_SELL_PUT"
     ASSIGNMENT = "ASSIGNMENT"
     SELL_CALL = "SELL_CALL"
+    CLOSE_SELL_CALL = "CLOSE_SELL_CALL"
     EXERCISE_CALL = "EXERCISE_CALL"
     LONG_SPOT = "LONG_SPOT"
     CLOSE_LONG_SPOT = "CLOSE_LONG_SPOT"
@@ -82,6 +86,7 @@ class Trades(SQLModel, table=True):
     expiry_date: date | None = Field(default=None, nullable=True)
     strike_price_cents: int | None = Field(default=None, nullable=True)
     quantity: int = Field(sa_column=Column(Integer, nullable=False))
+    quantity_multiplier: int = Field(sa_column=Column(Integer, nullable=False), default=1)
     price_cents: int = Field(sa_column=Column(Integer, nullable=False))
     gross_cash_flow_cents: int = Field(sa_column=Column(Integer, nullable=False))
     commission_cents: int = Field(sa_column=Column(Integer, nullable=False))
@@ -91,8 +96,14 @@ class Trades(SQLModel, table=True):
     replaced_by_trade_id: int | None = Field(default=None, foreign_key="trades.id", nullable=True)
     notes: str | None = Field(default=None, sa_column=Column(Text, nullable=True))
     cycle_id: int | None = Field(default=None, foreign_key="cycles.id", nullable=True, index=True)
+
     cycle: "Cycles" = Relationship(back_populates="trades")
 
+    related_loan_change_event: Optional["CycleLoanChangeEvents"] = Relationship(
+        back_populates="trade",
+        sa_relationship_kwargs={"uselist": False},
+    )
+
 
 class Cycles(SQLModel, table=True):
     __tablename__ = "cycles"  # type: ignore[attr-defined]
@@ -108,12 +119,48 @@ class Cycles(SQLModel, table=True):
     status: CycleStatus = Field(sa_column=Column(Text, nullable=False))
     funding_source: FundingSource = Field(sa_column=Column(Text, nullable=True))
     capital_exposure_cents: int | None = Field(default=None, nullable=True)
-    loan_amount_cents: int | None = Field(default=None, nullable=True)
-    loan_interest_rate_bps: int | None = Field(default=None, nullable=True)
     start_date: date = Field(sa_column=Column(Date, nullable=False))
     end_date: date | None = Field(default=None, sa_column=Column(Date, nullable=True))
+
     trades: list["Trades"] = Relationship(back_populates="cycle")
 
+    loan_amount_cents: int | None = Field(default=None, nullable=True)
+    loan_interest_rate_tenth_bps: int | None = Field(default=None, nullable=True)
+
+    latest_interest_accrued_date: date | None = Field(default=None, sa_column=Column(Date, nullable=True))
+    total_accrued_amount_cents: int = Field(default=0, sa_column=Column(Integer, nullable=False))
+
+    loan_change_events: list["CycleLoanChangeEvents"] = Relationship(back_populates="cycle")
+    daily_accruals: list["CycleDailyAccrual"] = Relationship(back_populates="cycle")
+
+
+class CycleLoanChangeEvents(SQLModel, table=True):
+    __tablename__ = "cycle_loan_change_events"  # type: ignore[attr-defined]
+    id: int | None = Field(default=None, primary_key=True)
+    cycle_id: int = Field(sa_column=Column(Integer, ForeignKey("cycles.id", ondelete="CASCADE"), nullable=False, index=True))
+    effective_date: date = Field(sa_column=Column(Date, nullable=False))
+    loan_amount_cents: int | None = Field(default=None, sa_column=Column(Integer, nullable=True))
+    loan_interest_rate_tenth_bps: int | None = Field(default=None, sa_column=Column(Integer, nullable=True))
+    related_trade_id: int | None = Field(default=None, sa_column=Column(Integer, ForeignKey("trades.id"), nullable=True, unique=True))
+    notes: str | None = Field(default=None, sa_column=Column(Text, nullable=True))
+    created_at: datetime = Field(sa_column=Column(DateTime(timezone=True), nullable=False))
+
+    cycle: "Cycles" = Relationship(back_populates="loan_change_events")
+    trade: Optional["Trades"] = Relationship(back_populates="related_loan_change_event")
+
+
+class CycleDailyAccrual(SQLModel, table=True):
+    __tablename__ = "cycle_daily_accrual"  # type: ignore[attr-defined]
+    __table_args__ = (UniqueConstraint("cycle_id", "accrual_date", name="uq_cycle_daily_accruals_cycle_date"),)
+
+    id: int | None = Field(default=None, primary_key=True)
+    cycle_id: int = Field(sa_column=Column(Integer, ForeignKey("cycles.id", ondelete="CASCADE"), nullable=False, index=True))
+    accrual_date: date = Field(sa_column=Column(Date, nullable=False))
+    accrual_amount_cents: int = Field(sa_column=Column(Integer, nullable=False))
+    created_at: datetime = Field(sa_column=Column(DateTime(timezone=True), nullable=False))
+
+    cycle: "Cycles" = Relationship(back_populates="daily_accruals")
+
 
 class Exchanges(SQLModel, table=True):
     __tablename__ = "exchanges"  # type: ignore[attr-defined]

backend/trading_journal/service.py

@@ -10,9 +10,22 @@ from starlette.middleware.base import BaseHTTPMiddleware, RequestResponseEndpoin
 
 import settings
 from trading_journal import crud, security
-from trading_journal.dto import ExchangesBase, ExchangesCreate, SessionsCreate, SessionsUpdate, UserCreate, UserLogin, UserRead
-
-SessionsCreate.model_rebuild()
+from trading_journal.dto import (
+    CycleBase,
+    CycleCreate,
+    CycleRead,
+    CycleUpdate,
+    ExchangesBase,
+    ExchangesCreate,
+    ExchangesRead,
+    SessionsCreate,
+    SessionsUpdate,
+    TradeCreate,
+    TradeRead,
+    UserCreate,
+    UserLogin,
+    UserRead,
+)
 
 if TYPE_CHECKING:
     from sqlmodel import Session
@@ -95,6 +108,27 @@ class ExchangeAlreadyExistsError(ServiceError):
     pass
 
 
+class ExchangeNotFoundError(ServiceError):
+    pass
+
+
+class CycleNotFoundError(ServiceError):
+    pass
+
+
+class TradeNotFoundError(ServiceError):
+    pass
+
+
+class InvalidTradeDataError(ServiceError):
+    pass
+
+
+class InvalidCycleDataError(ServiceError):
+    pass
+
+
+# User service
 def register_user_service(db_session: Session, user_in: UserCreate) -> UserRead:
     if crud.get_user_by_username(db_session, user_in.username):
         raise UserAlreadyExistsError("username already exists")
@@ -156,7 +190,7 @@ def create_exchange_service(db_session: Session, user_id: int, name: str, notes:
         try:
             exchange_dto = ExchangesCreate.model_validate(exchange)
         except Exception as e:
-            logger.exception("Failed to convert exchange to ExchangesCreate: ")
+            logger.exception("Failed to convert exchange to ExchangesCreate:")
             raise ServiceError("Failed to convert exchange to ExchangesCreate") from e
     except Exception as e:
         logger.exception("Failed to create exchange:")
@@ -164,10 +198,167 @@ def create_exchange_service(db_session: Session, user_id: int, name: str, notes:
     return exchange_dto
 
 
-def get_exchanges_by_user_service(db_session: Session, user_id: int) -> list[ExchangesBase]:
+def get_exchanges_by_user_service(db_session: Session, user_id: int) -> list[ExchangesRead]:
     exchanges = crud.get_all_exchanges_by_user_id(db_session, user_id)
-    return [ExchangesBase.model_validate(exchange) for exchange in exchanges]
+    return [ExchangesRead.model_validate(exchange) for exchange in exchanges]
 
 
-def get_trades_service(db_session: Session, user_id: int) -> list:
-    return crud.get_trades_by_user_id(db_session, user_id)
+def update_exchanges_service(db_session: Session, user_id: int, exchange_id: int, name: str | None, notes: str | None) -> ExchangesBase:
+    existing_exchange = crud.get_exchange_by_id(db_session, exchange_id)
+    if not existing_exchange:
+        raise ExchangeNotFoundError("Exchange not found")
+    if existing_exchange.user_id != user_id:
+        raise ExchangeNotFoundError("Exchange not found")
+
+    if name:
+        other_exchange = crud.get_exchange_by_name_and_user_id(db_session, name, user_id)
+        if other_exchange and other_exchange.id != existing_exchange.id:
+            raise ExchangeAlreadyExistsError("Another exchange with the same name already exists for this user")
+
+    exchange_data = ExchangesBase(
+        name=name or existing_exchange.name,
+        notes=notes or existing_exchange.notes,
+    )
+    try:
+        exchange = crud.update_exchange(db_session, cast("int", existing_exchange.id), update_data=exchange_data)
+    except Exception as e:
+        logger.exception("Failed to update exchange: \n")
+        raise ServiceError("Failed to update exchange") from e
+    return ExchangesBase.model_validate(exchange)
+
+
+# Cycle Service
+def create_cycle_service(db_session: Session, user_id: int, cycle_data: CycleBase) -> CycleRead:
+    raise NotImplementedError("Cycle creation not implemented")
+    cycle_data_dict = cycle_data.model_dump()
+    cycle_data_dict["user_id"] = user_id
+    cycle_data_with_user_id: CycleCreate = CycleCreate.model_validate(cycle_data_dict)
+    created_cycle = crud.create_cycle(db_session, cycle_data=cycle_data_with_user_id)
+    return CycleRead.model_validate(created_cycle)
+
+
+def get_cycle_by_id_service(db_session: Session, user_id: int, cycle_id: int) -> CycleRead:
+    cycle = crud.get_cycle_by_id(db_session, cycle_id)
+    if not cycle:
+        raise CycleNotFoundError("Cycle not found")
+    if cycle.user_id != user_id:
+        raise CycleNotFoundError("Cycle not found")
+    return CycleRead.model_validate(cycle)
+
+
+def get_cycles_by_user_service(db_session: Session, user_id: int) -> list[CycleRead]:
+    cycles = crud.get_cycles_by_user_id(db_session, user_id)
+    return [CycleRead.model_validate(cycle) for cycle in cycles]
+
+
+def _validate_cycle_update_data(cycle_data: CycleUpdate) -> tuple[bool, str]:  # noqa: PLR0911
+    if cycle_data.status == "CLOSED" and cycle_data.end_date is None:
+        return False, "end_date is required when status is CLOSED"
+    if cycle_data.status == "OPEN" and cycle_data.end_date is not None:
+        return False, "end_date must be empty when status is OPEN"
+    if cycle_data.capital_exposure_cents is not None and cycle_data.capital_exposure_cents < 0:
+        return False, "capital_exposure_cents must be non-negative"
+    if (
+        cycle_data.funding_source is not None
+        and cycle_data.funding_source != "CASH"
+        and (cycle_data.loan_amount_cents is None or cycle_data.loan_interest_rate_tenth_bps is None)
+    ):
+        return False, "loan_amount_cents and loan_interest_rate_tenth_bps are required when funding_source is not CASH"
+    if cycle_data.loan_amount_cents is not None and cycle_data.loan_amount_cents < 0:
+        return False, "loan_amount_cents must be non-negative"
+    if cycle_data.loan_interest_rate_tenth_bps is not None and cycle_data.loan_interest_rate_tenth_bps < 0:
+        return False, "loan_interest_rate_tenth_bps must be non-negative"
+    return True, ""
+
+
+def update_cycle_service(db_session: Session, user_id: int, cycle_data: CycleUpdate) -> CycleRead:
+    is_valid, err_msg = _validate_cycle_update_data(cycle_data)
+    if not is_valid:
+        raise InvalidCycleDataError(err_msg)
+    cycle_id = cast("int", cycle_data.id)
+    existing_cycle = crud.get_cycle_by_id(db_session, cycle_id)
+    if not existing_cycle:
+        raise CycleNotFoundError("Cycle not found")
+    if existing_cycle.user_id != user_id:
+        raise CycleNotFoundError("Cycle not found")
+
+    provided_data_dict = cycle_data.model_dump(exclude_unset=True)
+    cycle_data_with_user_id: CycleBase = CycleBase.model_validate(provided_data_dict)
+
+    try:
+        updated_cycle = crud.update_cycle(db_session, cycle_id, update_data=cycle_data_with_user_id)
+    except Exception as e:
+        logger.exception("Failed to update cycle: \n")
+        raise ServiceError("Failed to update cycle") from e
+    return CycleRead.model_validate(updated_cycle)
+
+
+# Trades service
+def _append_cashflows(trade_data: TradeCreate) -> TradeCreate:
+    sign_multipler: int
+    if trade_data.trade_type in ("SELL_PUT", "SELL_CALL", "EXERCISE_CALL", "CLOSE_LONG_SPOT", "SHORT_SPOT"):
+        sign_multipler = 1
+    else:
+        sign_multipler = -1
+    quantity = trade_data.quantity * trade_data.quantity_multiplier
+    gross_cash_flow_cents = quantity * trade_data.price_cents * sign_multipler
+    net_cash_flow_cents = gross_cash_flow_cents - trade_data.commission_cents
+    trade_data.gross_cash_flow_cents = gross_cash_flow_cents
+    trade_data.net_cash_flow_cents = net_cash_flow_cents
+    return trade_data
+
+
+def _validate_trade_data(trade_data: TradeCreate) -> bool:
+    return not (
+        trade_data.trade_type in ("SELL_PUT", "SELL_CALL") and (trade_data.expiry_date is None or trade_data.strike_price_cents is None)
+    )
+
+
+def create_trade_service(db_session: Session, user_id: int, trade_data: TradeCreate) -> TradeRead:
+    if not _validate_trade_data(trade_data):
+        raise InvalidTradeDataError("Invalid trade data: expiry_date and strike_price_cents are required for SELL_PUT and SELL_CALL trades")
+    trade_data_dict = trade_data.model_dump()
+    trade_data_dict["user_id"] = user_id
+    trade_data_with_user_id: TradeCreate = TradeCreate.model_validate(trade_data_dict)
+    trade_data_with_user_id = _append_cashflows(trade_data_with_user_id)
+    created_trade = crud.create_trade(db_session, trade_data=trade_data_with_user_id)
+    return TradeRead.model_validate(created_trade)
+
+
+def get_trade_by_id_service(db_session: Session, user_id: int, trade_id: int) -> TradeRead:
+    trade = crud.get_trade_by_id(db_session, trade_id)
+    if not trade:
+        raise TradeNotFoundError("Trade not found")
+    if trade.user_id != user_id:
+        raise TradeNotFoundError("Trade not found")
+    return TradeRead.model_validate(trade)
+
+
+def update_trade_friendly_name_service(db_session: Session, user_id: int, trade_id: int, friendly_name: str) -> TradeRead:
+    existing_trade = crud.get_trade_by_id(db_session, trade_id)
+    if not existing_trade:
+        raise TradeNotFoundError("Trade not found")
+    if existing_trade.user_id != user_id:
+        raise TradeNotFoundError("Trade not found")
+    try:
+        updated_trade = crud.update_trade_friendly_name(db_session, trade_id, friendly_name)
+    except Exception as e:
+        logger.exception("Failed to update trade friendly name: \n")
+        raise ServiceError("Failed to update trade friendly name") from e
+    return TradeRead.model_validate(updated_trade)
+
+
+def update_trade_note_service(db_session: Session, user_id: int, trade_id: int, note: str | None) -> TradeRead:
+    existing_trade = crud.get_trade_by_id(db_session, trade_id)
+    if not existing_trade:
+        raise TradeNotFoundError("Trade not found")
+    if existing_trade.user_id != user_id:
+        raise TradeNotFoundError("Trade not found")
+    if note is None:
+        note = ""
+    try:
+        updated_trade = crud.update_trade_note(db_session, trade_id, note)
+    except Exception as e:
+        logger.exception("Failed to update trade notes: \n")
+        raise ServiceError("Failed to update trade notes") from e
+    return TradeRead.model_validate(updated_trade)

backend/utils/db_migration.py

@@ -0,0 +1,7 @@
+from sqlmodel import create_engine
+
+import settings
+from trading_journal import db_migration
+
+db_engine = create_engine(settings.settings.database_url, echo=True)
+db_migration.run_migrations(db_engine)

backend/utils/db_mirgration.py

@@ -1,13 +0,0 @@
-import sys
-from pathlib import Path
-
-from sqlmodel import create_engine
-
-project_parent = Path(__file__).resolve().parents[1]
-sys.path.insert(0, str(project_parent))
-
-import settings  # noqa: E402
-from trading_journal import db_migration  # noqa: E402
-
-db_engine = create_engine(settings.settings.database_url, echo=True)
-db_migration.run_migrations(db_engine)