feat(database): encrypt transactions data

7project/backend/alembic/versions/2025_10_29_1326-46b9e702e83f_add_encrypted_type.py

@@ -0,0 +1,47 @@
+"""Add encrypted type
+
+Revision ID: 46b9e702e83f
+Revises: 1f2a3c4d5e6f
+Create Date: 2025-10-29 13:26:24.568523
+
+"""
+from typing import Sequence, Union
+
+import sqlalchemy_utils
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import mysql
+
+# revision identifiers, used by Alembic.
+revision: str = '46b9e702e83f'
+down_revision: Union[str, Sequence[str], None] = '1f2a3c4d5e6f'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column('transaction', 'amount',
+               existing_type=mysql.FLOAT(),
+               type_=sqlalchemy_utils.types.encrypted.encrypted_type.EncryptedType(),
+               existing_nullable=False)
+    op.alter_column('transaction', 'description',
+               existing_type=mysql.VARCHAR(length=255),
+               type_=sqlalchemy_utils.types.encrypted.encrypted_type.EncryptedType(),
+               existing_nullable=True)
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column('transaction', 'description',
+               existing_type=sqlalchemy_utils.types.encrypted.encrypted_type.EncryptedType(),
+               type_=mysql.VARCHAR(length=255),
+               existing_nullable=True)
+    op.alter_column('transaction', 'amount',
+               existing_type=sqlalchemy_utils.types.encrypted.encrypted_type.EncryptedType(),
+               type_=mysql.FLOAT(),
+               existing_nullable=False)
+    # ### end Alembic commands ###

7project/backend/app/models/transaction.py

@@ -1,15 +1,21 @@
+import os
 from fastapi_users_db_sqlalchemy import GUID
 from sqlalchemy import Column, Integer, String, Float, ForeignKey, Date, func
 from sqlalchemy.orm import relationship
+from sqlalchemy_utils import EncryptedType
+from sqlalchemy_utils.types.encrypted.encrypted_type import FernetEngine
+
 from app.core.base import Base
 from app.models.categories import association_table
 
+SECRET_KEY = os.environ.get("DB_ENCRYPTION_KEY", "localdev")
+
 
 class Transaction(Base):
     __tablename__ = "transaction"
     id = Column(Integer, primary_key=True, autoincrement=True)
-    amount = Column(Float, nullable=False)
+    amount = Column(EncryptedType(Float, SECRET_KEY, engine=FernetEngine), nullable=False)
-    description = Column(String(length=255), nullable=True)
+    description = Column(EncryptedType(String(length=255), SECRET_KEY, engine=FernetEngine), nullable=True)
     date = Column(Date, nullable=False, server_default=func.current_date())
     user_id = Column(GUID, ForeignKey("user.id"), nullable=False)
 

7project/backend/requirements.txt

@@ -54,6 +54,7 @@ sentry-sdk==2.42.0
 six==1.17.0
 sniffio==1.3.1
 SQLAlchemy==2.0.43
+SQLAlchemy-Utils==0.42.0
 starlette==0.48.0
 tomli==2.2.1
 typing-inspection==0.4.1

requirements.txt

@@ -1,72 +0,0 @@
-aio-pika==9.5.6
-aiormq==6.8.1
-aiosqlite==0.21.0
-alembic==1.16.5
-amqp==5.3.1
-annotated-types==0.7.0
-anyio==4.11.0
-argon2-cffi==23.1.0
-argon2-cffi-bindings==25.1.0
-asyncmy==0.2.9
-bcrypt==4.3.0
-billiard==4.2.2
-celery==5.5.3
-certifi==2025.10.5
-cffi==2.0.0
-click==8.1.8
-click-didyoumean==0.3.1
-click-plugins==1.1.1.2
-click-repl==0.3.0
-cryptography==46.0.1
-dnspython==2.7.0
-email_validator==2.2.0
-exceptiongroup==1.3.0
-fastapi==0.117.1
-fastapi-users==14.0.1
-fastapi-users-db-sqlalchemy==7.0.0
-greenlet==3.2.4
-h11==0.16.0
-httpcore==1.0.9
-httptools==0.6.4
-httpx==0.28.1
-httpx-oauth==0.16.1
-idna==3.10
-iniconfig==2.3.0
-kombu==5.5.4
-makefun==1.16.0
-Mako==1.3.10
-MarkupSafe==3.0.2
-multidict==6.6.4
-packaging==25.0
-pamqp==3.3.0
-pluggy==1.6.0
-prompt_toolkit==3.0.52
-propcache==0.3.2
-pwdlib==0.2.1
-pycparser==2.23
-pydantic==2.11.9
-pydantic_core==2.33.2
-Pygments==2.19.2
-PyJWT==2.10.1
-PyMySQL==1.1.2
-pytest==8.4.2
-pytest-asyncio==1.2.0
-python-dateutil==2.9.0.post0
-python-dotenv==1.1.1
-python-multipart==0.0.20
-PyYAML==6.0.2
-six==1.17.0
-sniffio==1.3.1
-SQLAlchemy==2.0.43
-starlette==0.48.0
-tomli==2.2.1
-typing-inspection==0.4.1
-typing_extensions==4.15.0
-tzdata==2025.2
-uvicorn==0.37.0
-uvloop==0.21.0
-vine==5.1.0
-watchfiles==1.1.0
-wcwidth==0.2.14
-websockets==15.0.1
-yarl==1.20.1