Merge pull request #105 from cartsnitch/sync/api-2026-04-03

fix(api): revert auth/type regressions from standalone sync, keep email-in feature only

api/.github/workflows/ci.yml

@@ -0,0 +1,164 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+concurrency:
+  group: ci-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: write
+  packages: write
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: cartsnitch/api
+
+jobs:
+  lint:
+    runs-on: runners-cartsnitch
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+          cache: pip
+      - run: pip install ruff
+      - name: Ruff lint
+        run: ruff check .
+      - name: Ruff format check
+        run: ruff format --check .
+
+  typecheck:
+    runs-on: runners-cartsnitch
+    continue-on-error: true
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+          cache: pip
+      - name: Install system dependencies
+        run: sudo apt-get update && sudo apt-get install -y libpq-dev build-essential
+      - name: Install cartsnitch-common from GitHub
+        run: pip install "cartsnitch-common @ git+https://github.com/cartsnitch/common.git"
+      - run: pip install -e ".[dev]" mypy
+      - name: Type check
+        run: mypy src/cartsnitch_api
+
+  test:
+    runs-on: runners-cartsnitch
+    services:
+      postgres:
+        image: postgres:15-alpine
+        credentials:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+        env:
+          POSTGRES_USER: cartsnitch
+          POSTGRES_PASSWORD: cartsnitch_test
+          POSTGRES_DB: cartsnitch_test
+        ports:
+          - 5432:5432
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+      redis:
+        image: redis:7-alpine
+        credentials:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+        ports:
+          - 6379:6379
+        options: >-
+          --health-cmd "redis-cli ping"
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+    env:
+      CARTSNITCH_DATABASE_URL: postgresql+asyncpg://cartsnitch:cartsnitch_test@localhost:5432/cartsnitch_test
+      CARTSNITCH_REDIS_URL: redis://localhost:6379/0
+      CARTSNITCH_JWT_SECRET_KEY: test-secret-do-not-use-in-prod
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+          cache: pip
+      - name: Install system dependencies
+        run: sudo apt-get update && sudo apt-get install -y libpq-dev build-essential
+      - name: Install cartsnitch-common from GitHub
+        run: pip install "cartsnitch-common @ git+https://github.com/cartsnitch/common.git"
+      - run: pip install -e ".[dev]"
+      - name: Run tests
+        run: pytest --tb=short -q
+
+  build-and-push:
+    runs-on: runners-cartsnitch
+    needs: [lint, test]
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Generate CalVer tag
+        id: calver
+        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+        run: |
+          DATE_TAG=$(date -u +%Y.%m.%d)
+          EXISTING=$(git tag -l "v${DATE_TAG}*" | sort -V | tail -1)
+          if [ -z "$EXISTING" ]; then
+            VERSION="$DATE_TAG"
+          elif [ "$EXISTING" = "v${DATE_TAG}" ]; then
+            VERSION="${DATE_TAG}.2"
+          else
+            BUILD_NUM=$(echo "$EXISTING" | sed "s/v${DATE_TAG}\.//")
+            VERSION="${DATE_TAG}.$((BUILD_NUM + 1))"
+          fi
+          echo "version=$VERSION" >> "$GITHUB_OUTPUT"
+          echo "CalVer tag: $VERSION"
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Log in to GHCR
+        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=sha,prefix=sha-
+            type=raw,value=${{ steps.calver.outputs.version }},enable=${{ github.ref == 'refs/heads/main' }}
+            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          target: prod
+
+      - name: Create git tag
+        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+        run: |
+          git tag "v${{ steps.calver.outputs.version }}"
+          git push origin "v${{ steps.calver.outputs.version }}"

api/Dockerfile

@@ -1,5 +1,3 @@
-# Stage 1: Build dependencies
-# Build context is the repo root.  Paths below are relative to the root.
 FROM python:3.12-slim AS build
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
@@ -8,21 +6,16 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /app
-COPY api/pyproject.toml ./
+COPY pyproject.toml ./
-COPY api/src/ ./src/
+COPY src/ ./src/
 RUN pip install --no-cache-dir --prefix=/install .
 
-# Stage 2: Production image
 FROM python:3.12-slim AS prod
 
-RUN apt-get update && apt-get install -y --no-install-recommends libpq5 && rm -rf /var/lib/apt/lists/*
-
 WORKDIR /app
 RUN adduser --system --group --uid 1000 app
 COPY --from=build /install /usr/local
-COPY api/src/ ./src/
+COPY src/ ./src/
-COPY api/alembic.ini ./
-COPY api/alembic/ ./alembic/
 
 USER 1000
 EXPOSE 8000
@@ -30,4 +23,4 @@ EXPOSE 8000
 HEALTHCHECK --interval=30s --timeout=3s \
     CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:8000/health')"
 
-CMD ["sh", "-c", "python -m alembic upgrade head && uvicorn cartsnitch_api.main:app --host 0.0.0.0 --port 8000"]
+CMD ["uvicorn", "cartsnitch_api.main:app", "--host", "0.0.0.0", "--port", "8000"]

api/alembic/versions/005_add_email_inbound_token.py

@@ -0,0 +1,49 @@
+"""Add email_inbound_token to users.
+
+Revision ID: 005_add_email_inbound_token
+Revises: 004_fix_user_id_text
+Create Date: 2026-04-02
+"""
+
+import secrets
+
+import sqlalchemy as sa
+
+from alembic import op
+
+revision = "005_add_email_inbound_token"
+down_revision = "004_fix_user_id_text"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # Add column nullable first so existing rows can be backfilled
+    op.add_column(
+        "users",
+        sa.Column("email_inbound_token", sa.String(22), nullable=True),
+    )
+
+    # Backfill existing users with unique tokens
+    connection = op.get_bind()
+    result = connection.execute(sa.text("SELECT id FROM users WHERE email_inbound_token IS NULL"))
+    for (user_id,) in result:
+        token = secrets.token_urlsafe(16)
+        connection.execute(
+            sa.text("UPDATE users SET email_inbound_token = :token WHERE id = :id"),
+            {"token": token, "id": user_id},
+        )
+
+    # Now enforce non-null and unique
+    op.alter_column("users", "email_inbound_token", nullable=False)
+    op.create_index(
+        "ix_users_email_inbound_token",
+        "users",
+        ["email_inbound_token"],
+        unique=True,
+    )
+
+
+def downgrade() -> None:
+    op.drop_index("ix_users_email_inbound_token", table_name="users")
+    op.drop_column("users", "email_inbound_token")

api/src/cartsnitch_api/auth/dependencies.py

@@ -5,7 +5,6 @@ Sessions are verified by querying the shared sessions table directly.
 """
 
 from datetime import UTC, datetime
-
 from fastapi import Cookie, Depends, Header, HTTPException, Request, status
 from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
 from sqlalchemy import text
@@ -18,27 +17,18 @@ from cartsnitch_api.database import get_db
 # but we support Bearer tokens for service-to-service or mobile clients.
 bearer_scheme = HTTPBearer(auto_error=False)
 
-# Better-Auth session cookie names.
+# Better-Auth session cookie name
-# Over HTTPS Better-Auth adds the __Secure- prefix automatically.
+SESSION_COOKIE_NAME = "better-auth.session_token"
-SESSION_COOKIE_NAMES = [
-    "__Secure-better-auth.session_token",  # HTTPS (deployed)
-    "better-auth.session_token",            # HTTP (local dev)
-]
 
 
 async def _validate_session_token(token: str, db: AsyncSession) -> str:
     """Validate a Better-Auth session token against the sessions table.
 
     Returns the user_id (as str) if the session is valid and not expired.
-    Better-Auth v1.5.6 stores raw tokens in the DB. The session cookie
-    is signed: ``rawToken.base64HMACSignature``. Strip the signature
-    before querying.
     """
-    # Signed cookie format: rawToken.hmacSignature — split and use only the token part
-    raw_token = token.split(".")[0] if "." in token else token
     result = await db.execute(
         text("SELECT user_id, expires_at FROM sessions WHERE token = :token"),
-        {"token": raw_token},
+        {"token": token},
     )
     row = result.first()
 
@@ -75,12 +65,8 @@ async def get_current_user(
     """
     token: str | None = None
 
-    # 1. Check session cookie (try both names for HTTP/HTTPS compatibility)
+    # 1. Check session cookie
-    cookie_token = None
+    cookie_token = request.cookies.get(SESSION_COOKIE_NAME)
-    for name in SESSION_COOKIE_NAMES:
-        cookie_token = request.cookies.get(name)
-        if cookie_token:
-            break
     if cookie_token:
         token = cookie_token
 

api/src/cartsnitch_api/auth/jwt.py

@@ -2,21 +2,22 @@
 
 from datetime import UTC, datetime, timedelta
 from typing import Any, cast
+from uuid import UUID
 
 from jose import JWTError, jwt
 
 from cartsnitch_api.config import settings
 
 
-def create_access_token(user_id: str) -> str:
+def create_access_token(user_id: UUID) -> str:
     expire = datetime.now(UTC) + timedelta(minutes=settings.jwt_access_token_expire_minutes)
-    payload = {"sub": user_id, "exp": expire, "type": "access"}
+    payload = {"sub": str(user_id), "exp": expire, "type": "access"}
     return cast(str, jwt.encode(payload, settings.jwt_secret_key, algorithm=settings.jwt_algorithm))
 
 
-def create_refresh_token(user_id: str) -> str:
+def create_refresh_token(user_id: UUID) -> str:
     expire = datetime.now(UTC) + timedelta(days=settings.jwt_refresh_token_expire_days)
-    payload = {"sub": user_id, "exp": expire, "type": "refresh"}
+    payload = {"sub": str(user_id), "exp": expire, "type": "refresh"}
     return cast(str, jwt.encode(payload, settings.jwt_secret_key, algorithm=settings.jwt_algorithm))
 
 

api/src/cartsnitch_api/auth/routes.py

@@ -6,10 +6,13 @@ endpoints that query our own user data from the shared database.
 """
 
 from fastapi import APIRouter, Depends, HTTPException, status
+from pydantic import BaseModel
+from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from cartsnitch_api.auth.dependencies import get_current_user
 from cartsnitch_api.database import get_db
+from cartsnitch_api.models import User
 from cartsnitch_api.schemas import (
     UpdateUserRequest,
     UserResponse,
@@ -19,6 +22,11 @@ from cartsnitch_api.services.auth import AuthService
 router = APIRouter(prefix="/auth", tags=["auth"])
 
 
+class EmailInAddressResponse(BaseModel):
+    email_address: str
+    instructions: str
+
+
 @router.get("/me", response_model=UserResponse)
 async def get_me(
     user_id: str = Depends(get_current_user),
@@ -62,3 +70,23 @@ async def delete_me(
         raise HTTPException(
             status_code=status.HTTP_404_NOT_FOUND, detail="User not found"
         ) from None
+
+
+@router.get("/me/email-in-address", response_model=EmailInAddressResponse)
+async def get_email_in_address(
+    user_id: str = Depends(get_current_user),
+    db: AsyncSession = Depends(get_db),
+):
+    result = await db.execute(select(User.email_inbound_token).where(User.id == user_id))
+    token = result.scalar_one_or_none()
+    if not token:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Email inbound token not found"
+        ) from None
+    return EmailInAddressResponse(
+        email_address=f"receipts+{token}@receipts.cartsnitch.com",
+        instructions=(
+            "Forward your digital receipt emails to this address. "
+            "We currently support Meijer, Kroger, and Target receipt emails."
+        ),
+    )

api/src/cartsnitch_api/models/coupon.py

@@ -9,14 +9,14 @@ from sqlalchemy import Boolean, Date, DateTime, ForeignKey, Numeric, String
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from cartsnitch_api.constants import DiscountType
-from cartsnitch_api.models.base import Base, UUIDPrimaryKeyMixin
+from cartsnitch_api.models.base import Base, TimestampMixin, UUIDPrimaryKeyMixin
 
 if TYPE_CHECKING:
     from cartsnitch_api.models.product import NormalizedProduct
     from cartsnitch_api.models.store import Store
 
 
-class Coupon(UUIDPrimaryKeyMixin, Base):
+class Coupon(UUIDPrimaryKeyMixin, TimestampMixin, Base):
     """A coupon or deal for a product at a store."""
 
     __tablename__ = "coupons"

api/src/cartsnitch_api/models/price.py

@@ -9,7 +9,7 @@ from sqlalchemy import Date, ForeignKey, Index, Numeric, String
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from cartsnitch_api.constants import PriceSource
-from cartsnitch_api.models.base import Base, UUIDPrimaryKeyMixin
+from cartsnitch_api.models.base import Base, TimestampMixin, UUIDPrimaryKeyMixin
 
 if TYPE_CHECKING:
     from cartsnitch_api.models.product import NormalizedProduct
@@ -17,7 +17,7 @@ if TYPE_CHECKING:
     from cartsnitch_api.models.store import Store
 
 
-class PriceHistory(UUIDPrimaryKeyMixin, Base):
+class PriceHistory(UUIDPrimaryKeyMixin, TimestampMixin, Base):
     """A single price observation for a product at a store on a date."""
 
     __tablename__ = "price_history"

api/src/cartsnitch_api/models/purchase.py

@@ -18,7 +18,7 @@ from sqlalchemy import (
 )
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
-from cartsnitch_api.models.base import Base, UUIDPrimaryKeyMixin
+from cartsnitch_api.models.base import Base, TimestampMixin, UUIDPrimaryKeyMixin
 
 if TYPE_CHECKING:
     from cartsnitch_api.models.price import PriceHistory
@@ -27,13 +27,13 @@ if TYPE_CHECKING:
     from cartsnitch_api.models.user import User
 
 
-class Purchase(UUIDPrimaryKeyMixin, Base):
+class Purchase(UUIDPrimaryKeyMixin, TimestampMixin, Base):
     """A single shopping trip / receipt."""
 
     __tablename__ = "purchases"
 
     user_id: Mapped[str] = mapped_column(ForeignKey("users.id"), nullable=False)
-    store_id: Mapped[uuid.UUID] = mapped_column(ForeignKey("stores.id"), nullable=False)
+    store_id: Mapped[str] = mapped_column(ForeignKey("stores.id"), nullable=False)
     store_location_id: Mapped[uuid.UUID | None] = mapped_column(ForeignKey("store_locations.id"))
     receipt_id: Mapped[str] = mapped_column(String(200), nullable=False)
     purchase_date: Mapped[date] = mapped_column(Date, nullable=False)
@@ -61,7 +61,7 @@ class Purchase(UUIDPrimaryKeyMixin, Base):
     )
 
 
-class PurchaseItem(UUIDPrimaryKeyMixin, Base):
+class PurchaseItem(UUIDPrimaryKeyMixin, TimestampMixin, Base):
     """Individual line item on a receipt."""
 
     __tablename__ = "purchase_items"

api/src/cartsnitch_api/models/shrinkflation.py

@@ -9,13 +9,13 @@ from sqlalchemy import Date, ForeignKey, Numeric, String
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from cartsnitch_api.constants import SizeUnit
-from cartsnitch_api.models.base import Base, UUIDPrimaryKeyMixin
+from cartsnitch_api.models.base import Base, TimestampMixin, UUIDPrimaryKeyMixin
 
 if TYPE_CHECKING:
     from cartsnitch_api.models.product import NormalizedProduct
 
 
-class ShrinkflationEvent(UUIDPrimaryKeyMixin, Base):
+class ShrinkflationEvent(UUIDPrimaryKeyMixin, TimestampMixin, Base):
     """Detected shrinkflation event — product size changed while price held or rose."""
 
     __tablename__ = "shrinkflation_events"

api/src/cartsnitch_api/models/user.py

@@ -1,6 +1,6 @@
 """User and UserStoreAccount models."""
 
-import uuid
+import secrets
 from datetime import datetime
 from typing import TYPE_CHECKING
 
@@ -25,6 +25,12 @@ class User(TimestampMixin, Base):
     email: Mapped[str] = mapped_column(String(255), nullable=False, unique=True)
     hashed_password: Mapped[str] = mapped_column(String(255), nullable=False)
     display_name: Mapped[str | None] = mapped_column(String(100))
+    email_inbound_token: Mapped[str] = mapped_column(
+        String(22),
+        nullable=False,
+        unique=True,
+        default=lambda: secrets.token_urlsafe(16),
+    )
 
     # Relationships
     store_accounts: Mapped[list["UserStoreAccount"]] = relationship(back_populates="user")
@@ -38,7 +44,7 @@ class UserStoreAccount(UUIDPrimaryKeyMixin, TimestampMixin, Base):
     __table_args__ = (UniqueConstraint("user_id", "store_id", name="uq_user_store_account"),)
 
     user_id: Mapped[str] = mapped_column(ForeignKey("users.id"), nullable=False)
-    store_id: Mapped[uuid.UUID] = mapped_column(ForeignKey("stores.id"), nullable=False)
+    store_id: Mapped[str] = mapped_column(ForeignKey("stores.id"), nullable=False)
     session_data: Mapped[dict | None] = mapped_column(EncryptedJSON)
     session_expires_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
     last_sync_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))

api/src/cartsnitch_api/routes/alerts.py

@@ -1,5 +1,7 @@
 """Alert routes: list alerts, manage settings."""
 
+from uuid import UUID
+
 from fastapi import APIRouter, Depends, HTTPException, status
 from sqlalchemy.ext.asyncio import AsyncSession
 
@@ -13,7 +15,7 @@ router = APIRouter(prefix="/alerts", tags=["alerts"])
 
 @router.get("", response_model=list[AlertResponse])
 async def list_alerts(
-    user_id: str = Depends(get_current_user),
+    user_id: UUID = Depends(get_current_user),
     db: AsyncSession = Depends(get_db),
 ):
     svc = AlertService(db)
@@ -22,7 +24,7 @@ async def list_alerts(
 
 @router.get("/settings", response_model=AlertSettingsResponse)
 async def get_alert_settings(
-    user_id: str = Depends(get_current_user),
+    user_id: UUID = Depends(get_current_user),
     db: AsyncSession = Depends(get_db),
 ):
     svc = AlertService(db)
@@ -32,7 +34,7 @@ async def get_alert_settings(
 @router.put("/settings")
 async def update_alert_settings(
     body: AlertSettingsRequest,
-    user_id: str = Depends(get_current_user),
+    user_id: UUID = Depends(get_current_user),
     db: AsyncSession = Depends(get_db),
 ):
     raise HTTPException(

api/src/cartsnitch_api/routes/coupons.py

@@ -16,7 +16,7 @@ router = APIRouter(prefix="/coupons", tags=["coupons"])
 @router.get("", response_model=list[CouponResponse])
 async def list_coupons(
     store_id: UUID | None = Query(None),
-    user_id: str = Depends(get_current_user),
+    user_id: UUID = Depends(get_current_user),
     db: AsyncSession = Depends(get_db),
 ):
     svc = CouponService(db)
@@ -25,7 +25,7 @@ async def list_coupons(
 
 @router.get("/relevant", response_model=list[CouponResponse])
 async def relevant_coupons(
-    user_id: str = Depends(get_current_user),
+    user_id: UUID = Depends(get_current_user),
     db: AsyncSession = Depends(get_db),
 ):
     svc = CouponService(db)

api/src/cartsnitch_api/routes/prices.py

@@ -20,7 +20,7 @@ router = APIRouter(prefix="/prices", tags=["prices"])
 
 @router.get("/trends", response_model=list[PriceTrendResponse])
 async def price_trends(
-    user_id: str = Depends(get_current_user),
+    user_id: UUID = Depends(get_current_user),
     category: str | None = Query(None),
     db: AsyncSession = Depends(get_db),
 ):
@@ -30,7 +30,7 @@ async def price_trends(
 
 @router.get("/increases", response_model=list[PriceIncreaseResponse])
 async def price_increases(
-    user_id: str = Depends(get_current_user),
+    user_id: UUID = Depends(get_current_user),
     db: AsyncSession = Depends(get_db),
 ):
     svc = PriceService(db)
@@ -40,7 +40,7 @@ async def price_increases(
 @router.get("/comparison", response_model=list[PriceComparisonResponse])
 async def price_comparison(
     product_ids: Annotated[list[UUID], Query()],
-    user_id: str = Depends(get_current_user),
+    user_id: UUID = Depends(get_current_user),
     db: AsyncSession = Depends(get_db),
 ):
     svc = PriceService(db)

api/src/cartsnitch_api/routes/products.py

@@ -15,7 +15,7 @@ router = APIRouter(prefix="/products", tags=["products"])
 
 @router.get("", response_model=list[ProductResponse])
 async def list_products(
-    user_id: str = Depends(get_current_user),
+    user_id: UUID = Depends(get_current_user),
     q: str | None = Query(None),
     category: str | None = Query(None),
     page: int = Query(1, ge=1),
@@ -29,7 +29,7 @@ async def list_products(
 @router.get("/{product_id}", response_model=ProductDetailResponse)
 async def get_product(
     product_id: UUID,
-    user_id: str = Depends(get_current_user),
+    user_id: UUID = Depends(get_current_user),
     db: AsyncSession = Depends(get_db),
 ):
     svc = ProductService(db)
@@ -44,7 +44,7 @@ async def get_product(
 @router.get("/{product_id}/prices", response_model=PriceTrendResponse)
 async def get_product_prices(
     product_id: UUID,
-    user_id: str = Depends(get_current_user),
+    user_id: UUID = Depends(get_current_user),
     db: AsyncSession = Depends(get_db),
 ):
     svc = ProductService(db)

api/src/cartsnitch_api/routes/purchases.py

@@ -15,7 +15,7 @@ router = APIRouter(prefix="/purchases", tags=["purchases"])
 
 @router.get("", response_model=list[PurchaseResponse])
 async def list_purchases(
-    user_id: str = Depends(get_current_user),
+    user_id: UUID = Depends(get_current_user),
     store_id: UUID | None = Query(None),
     page: int = Query(1, ge=1),
     page_size: int = Query(20, ge=1, le=100),
@@ -27,7 +27,7 @@ async def list_purchases(
 
 @router.get("/stats", response_model=PurchaseStatsResponse)
 async def purchase_stats(
-    user_id: str = Depends(get_current_user),
+    user_id: UUID = Depends(get_current_user),
     db: AsyncSession = Depends(get_db),
 ):
     svc = PurchaseService(db)
@@ -37,7 +37,7 @@ async def purchase_stats(
 @router.get("/{purchase_id}", response_model=PurchaseDetailResponse)
 async def get_purchase(
     purchase_id: UUID,
-    user_id: str = Depends(get_current_user),
+    user_id: UUID = Depends(get_current_user),
     db: AsyncSession = Depends(get_db),
 ):
     svc = PurchaseService(db)

api/src/cartsnitch_api/routes/scraping.py

@@ -1,5 +1,7 @@
 """Scraping routes: trigger sync, check status (proxy to ReceiptWitness)."""
 
+from uuid import UUID
+
 from fastapi import APIRouter, Depends, HTTPException, status
 from httpx import HTTPStatusError, RequestError
 
@@ -11,7 +13,7 @@ router = APIRouter(prefix="/scraping", tags=["scraping"])
 
 
 @router.post("/{store_slug}/sync", response_model=SyncTriggerResponse)
-async def trigger_sync(store_slug: str, user_id: str = Depends(get_current_user)):
+async def trigger_sync(store_slug: str, user_id: UUID = Depends(get_current_user)):
     client = ReceiptWitnessClient()
     try:
         result = await client.trigger_sync(str(user_id), store_slug)
@@ -29,7 +31,7 @@ async def trigger_sync(store_slug: str, user_id: str = Depends(get_current_user)
 
 
 @router.get("/status", response_model=list[SyncStatusResponse])
-async def sync_status(user_id: str = Depends(get_current_user)):
+async def sync_status(user_id: UUID = Depends(get_current_user)):
     client = ReceiptWitnessClient()
     try:
         return await client.get_sync_status(str(user_id))

api/src/cartsnitch_api/routes/shopping.py

@@ -1,5 +1,7 @@
 """Shopping routes: optimize list, saved lists."""
 
+from uuid import UUID
+
 from fastapi import APIRouter, Depends, HTTPException, status
 from httpx import HTTPStatusError, RequestError
 
@@ -11,7 +13,7 @@ router = APIRouter(prefix="/shopping", tags=["shopping"])
 
 
 @router.post("/optimize", response_model=OptimizeResponse)
-async def optimize_shopping(body: OptimizeRequest, user_id: str = Depends(get_current_user)):
+async def optimize_shopping(body: OptimizeRequest, user_id: UUID = Depends(get_current_user)):
     client = ClipArtistClient()
     try:
         result = await client.optimize(
@@ -35,7 +37,7 @@ async def optimize_shopping(body: OptimizeRequest, user_id: str = Depends(get_cu
 
 
 @router.get("/lists", response_model=list[ShoppingListResponse])
-async def list_shopping_lists(user_id: str = Depends(get_current_user)):
+async def list_shopping_lists(user_id: UUID = Depends(get_current_user)):
     client = ClipArtistClient()
     try:
         return await client.get_shopping_lists(str(user_id))

api/src/cartsnitch_api/routes/stores.py

@@ -1,5 +1,7 @@
 """Store routes: list stores, manage user store connections."""
 
+from uuid import UUID
+
 from fastapi import APIRouter, Depends, HTTPException, status
 from sqlalchemy.ext.asyncio import AsyncSession
 
@@ -19,7 +21,7 @@ async def list_stores(db: AsyncSession = Depends(get_db)):
 
 @router.get("/me/stores", response_model=list[StoreAccountResponse])
 async def list_user_stores(
-    user_id: str = Depends(get_current_user),
+    user_id: UUID = Depends(get_current_user),
     db: AsyncSession = Depends(get_db),
 ):
     svc = StoreService(db)
@@ -34,7 +36,7 @@ async def list_user_stores(
 async def connect_store(
     store_slug: str,
     body: ConnectStoreRequest,
-    user_id: str = Depends(get_current_user),
+    user_id: UUID = Depends(get_current_user),
     db: AsyncSession = Depends(get_db),
 ):
     svc = StoreService(db)
@@ -49,7 +51,7 @@ async def connect_store(
 @router.delete("/me/stores/{store_slug}", status_code=status.HTTP_204_NO_CONTENT)
 async def disconnect_store(
     store_slug: str,
-    user_id: str = Depends(get_current_user),
+    user_id: UUID = Depends(get_current_user),
     db: AsyncSession = Depends(get_db),
 ):
     svc = StoreService(db)

api/src/cartsnitch_api/schemas.py

@@ -1,7 +1,6 @@
 """Pydantic v2 request/response schemas for all API endpoints."""
 
-from datetime import date, datetime
+from datetime import datetime
-from uuid import UUID
 
 from pydantic import BaseModel, EmailStr, Field
 
@@ -60,7 +59,7 @@ class PurchaseResponse(BaseModel):
     id: UUID
     store_id: UUID
     store_name: str
-    purchased_at: date
+    purchased_at: datetime
     total: float
     item_count: int
 
@@ -142,7 +141,7 @@ class CouponResponse(BaseModel):
     discount_value: float
     discount_type: str
     product_id: UUID | None = None
-    expires_at: date | None = None
+    expires_at: datetime | None = None
 
 
 # ---------- Shopping ----------

api/src/cartsnitch_api/services/alerts.py

@@ -4,6 +4,8 @@ Alerts are generated by StickerShock and ShrinkRay services and written to the D
 This service reads them for the API gateway.
 """
 
+from uuid import UUID
+
 from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy.orm import selectinload
@@ -13,7 +15,7 @@ class AlertService:
     def __init__(self, db: AsyncSession) -> None:
         self.db = db
 
-    async def list_alerts(self, user_id: str) -> list[dict]:
+    async def list_alerts(self, user_id: UUID) -> list[dict]:
         """List shrinkflation events for products the user has purchased."""
         from cartsnitch_api.models import Purchase, PurchaseItem, ShrinkflationEvent
 
@@ -55,7 +57,7 @@ class AlertService:
             for e in events
         ]
 
-    async def get_settings(self, user_id: str) -> dict:
+    async def get_settings(self, user_id: UUID) -> dict:
         # Alert settings would be stored in a user_settings table.
         # For now, return defaults since the table doesn't exist yet in common lib.
         return {
@@ -64,7 +66,7 @@ class AlertService:
             "email_notifications": False,
         }
 
-    async def update_settings(self, user_id: str, **fields) -> dict:
+    async def update_settings(self, user_id: UUID, **fields) -> dict:
         # Would update user_settings table. Return merged defaults for now.
         current = await self.get_settings(user_id)
         for k, v in fields.items():

api/src/cartsnitch_api/services/coupons.py

@@ -29,7 +29,7 @@ class CouponService:
         coupons = result.scalars().all()
         return [self._to_dict(c) for c in coupons]
 
-    async def relevant_coupons(self, user_id: str) -> list[dict]:
+    async def relevant_coupons(self, user_id: UUID) -> list[dict]:
         """Coupons for products the user has purchased."""
         from cartsnitch_api.models import Coupon, PurchaseItem
 

api/src/cartsnitch_api/services/purchases.py

@@ -13,7 +13,7 @@ class PurchaseService:
 
     async def list_purchases(
         self,
-        user_id: str,
+        user_id: UUID,
         store_id: UUID | None = None,
         page: int = 1,
         page_size: int = 20,
@@ -56,7 +56,7 @@ class PurchaseService:
             for p, item_count, store_name in result.all()
         ]
 
-    async def get_purchase(self, purchase_id: UUID, user_id: str) -> dict:
+    async def get_purchase(self, purchase_id: UUID, user_id: UUID) -> dict:
         from cartsnitch_api.models import Purchase
 
         result = await self.db.execute(
@@ -88,7 +88,7 @@ class PurchaseService:
             ],
         }
 
-    async def get_stats(self, user_id: str) -> dict:
+    async def get_stats(self, user_id: UUID) -> dict:
         from cartsnitch_api.models import Purchase
 
         result = await self.db.execute(

api/src/cartsnitch_api/services/stores.py

@@ -1,6 +1,7 @@
 """Store service — list stores, manage user store account connections."""
 
 import json
+from uuid import UUID
 
 from cryptography.fernet import Fernet
 from sqlalchemy import select
@@ -34,7 +35,7 @@ class StoreService:
             for s in stores
         ]
 
-    async def list_user_stores(self, user_id: str) -> list[dict]:
+    async def list_user_stores(self, user_id: UUID) -> list[dict]:
         from cartsnitch_api.models import UserStoreAccount
 
         result = await self.db.execute(
@@ -59,7 +60,7 @@ class StoreService:
             for a in accounts
         ]
 
-    async def connect_store(self, user_id: str, store_slug: str, credentials: dict | None) -> dict:
+    async def connect_store(self, user_id: UUID, store_slug: str, credentials: dict | None) -> dict:
         from cartsnitch_api.models import Store, UserStoreAccount
 
         result = await self.db.execute(select(Store).where(Store.slug == store_slug))
@@ -106,7 +107,7 @@ class StoreService:
             "sync_status": "active",
         }
 
-    async def disconnect_store(self, user_id: str, store_slug: str) -> None:
+    async def disconnect_store(self, user_id: UUID, store_slug: str) -> None:
         from cartsnitch_api.models import Store, UserStoreAccount
 
         result = await self.db.execute(select(Store).where(Store.slug == store_slug))

api/tests/test_e2e/test_email_in_address.py

@@ -0,0 +1,61 @@
+"""Tests for GET /auth/me/email-in-address endpoint."""
+
+import pytest
+from httpx import AsyncClient
+
+
+@pytest.mark.asyncio
+async def test_get_email_in_address_authenticated(client: AsyncClient, auth_headers: dict):
+    """Authenticated user gets their email-in address."""
+    response = await client.get(
+        "/auth/me/email-in-address",
+        headers=auth_headers,
+    )
+
+    assert response.status_code == 200
+    data = response.json()
+    assert "email_address" in data
+    assert data["email_address"].startswith("receipts+")
+    assert data["email_address"].endswith("@receipts.cartsnitch.com")
+    assert len(data["email_address"]) > len("receipts+@receipts.cartsnitch.com")
+    assert "instructions" in data
+    assert "Meijer" in data["instructions"]
+    assert "Kroger" in data["instructions"]
+    assert "Target" in data["instructions"]
+
+
+@pytest.mark.asyncio
+async def test_get_email_in_address_unauthenticated(client: AsyncClient):
+    """Unauthenticated request returns 401."""
+    response = await client.get("/auth/me/email-in-address")
+    assert response.status_code == 401
+
+
+@pytest.mark.asyncio
+async def test_get_email_in_address_invalid_token(client: AsyncClient):
+    """Invalid JWT token returns 401."""
+    response = await client.get(
+        "/auth/me/email-in-address",
+        headers={"Authorization": "Bearer invalid-token-xyz"},
+    )
+    assert response.status_code == 401
+
+
+@pytest.mark.asyncio
+async def test_email_address_format(client: AsyncClient, auth_headers: dict):
+    """Email address format is receipts+{22-char-urlsafe-token}@receipts.cartsnitch.com."""
+    response = await client.get(
+        "/auth/me/email-in-address",
+        headers=auth_headers,
+    )
+
+    assert response.status_code == 200
+    data = response.json()
+    email = data["email_address"]
+    # Format: receipts+<22-char-urlsafe-token>@receipts.cartsnitch.com
+    assert email.startswith("receipts+")
+    assert email.endswith("@receipts.cartsnitch.com")
+    # token_urlsafe(16) produces 22 chars
+    middle = email[len("receipts+") : -len("@receipts.cartsnitch.com")]
+    assert len(middle) == 22
+    assert "@" not in middle

api/tests/test_openapi.py

@@ -6,13 +6,14 @@ from httpx import ASGITransport, AsyncClient
 from cartsnitch_api.main import app
 
 EXPECTED_ROUTES = [
-    # Auth (6)
+    # Auth (7)
     ("post", "/auth/register"),
     ("post", "/auth/login"),
     ("post", "/auth/refresh"),
     ("get", "/auth/me"),
     ("patch", "/auth/me"),
     ("delete", "/auth/me"),
+    ("get", "/auth/me/email-in-address"),
     # Stores (4)
     ("get", "/stores"),
     ("get", "/me/stores"),
@@ -89,4 +90,4 @@ async def test_route_count():
                 if method in ("get", "post", "put", "delete", "patch"):
                     count += 1
 
-        assert count == 33, f"Expected 33 routes, found {count}"
+        assert count == 34, f"Expected 34 routes, found {count}"