diff --git a/backend/account/models.py b/backend/account/models.py
index 2bfa946..06b1412 100644
--- a/backend/account/models.py
+++ b/backend/account/models.py
@@ -9,7 +9,7 @@
 
 
 @receiver(post_save, sender=User)
-def create_or_update_vendor(sender, instance, created, **kwargs):
+def create_or_update_vendor(sender, instance, created, **kwargs) -> None:
     print("RECEIVER")
     print("SENDER", sender.username)
     print("INSTANCE", instance)
diff --git a/backend/account/schema.py b/backend/account/schema.py
index fb5c7f3..b4988b2 100644
--- a/backend/account/schema.py
+++ b/backend/account/schema.py
@@ -17,7 +17,7 @@ class Query(graphene.ObjectType):
     user_details = graphene.Field(UserType)
     # user_details = graphene.List(UserType)
 
-    def resolve_user_details(root, info, **kwargs):
+    def resolve_user_details(root, info, **kwargs) -> User:
         """
         The resolve_user_details function is a resolver function that returns the user details of the currently logged in user.
         It takes three arguments: root, info, and **kwargs. The root argument is required by all resolve functions and contains data about the query itself;
diff --git a/backend/account/serializers.py b/backend/account/serializers.py
index e97ab5e..8f127af 100644
--- a/backend/account/serializers.py
+++ b/backend/account/serializers.py
@@ -24,7 +24,7 @@ class Meta:
         fields = ["id", "username", "email", "password"]
         extra_kwargs = {"password": {"write_only": True}}
 
-    def create(self, validated_data):
+    def create(self, validated_data: dict) -> User:
         print("SERIALIZER")
         user = User.objects.create_user(
             validated_data["username"],
@@ -42,13 +42,13 @@ class Meta:
         model = User
         fields = ("old_password", "password")
 
-    def validate_old_password(self, value):
+    def validate_old_password(self, value: str) -> str:
         user = self.context["request"].user
         if not user.check_password(value):
             raise serializers.ValidationError({"old_password": "Old password is not correct"})
         return value
 
-    def update(self, instance, validated_data):
+    def update(self, instance, validated_data: dict) -> User:
         user = self.context["request"].user
 
         if user.id != instance.id:
@@ -71,19 +71,19 @@ class Meta:
             "last_name": {"required": True},
         }
 
-    def validate_email(self, value):
+    def validate_email(self, value: str) -> str:
         user = self.context["request"].user
         if User.objects.exclude(id=user.id).filter(email=value).exists():
             raise serializers.ValidationError({"email": "This email is already in use."})
         return value
 
-    def validate_username(self, value):
+    def validate_username(self, value: str) -> str:
         user = self.context["request"].user
         if User.objects.exclude(id=user.id).filter(username=value).exists():
             raise serializers.ValidationError({"username": "This username is already in use."})
         return value
 
-    def update(self, instance, validated_data):
+    def update(self, instance, validated_data: dict) -> User:
         user = self.context["request"].user
 
         if user.id != instance.id:
@@ -105,7 +105,7 @@ class AccountLoginSerializer(serializers.Serializer):
     username = serializers.CharField()
     password = serializers.CharField()
 
-    def validate(self, data):
+    def validate(self, data: dict) -> dict:
         user = authenticate(**data)
         if user and user.is_active:
             return user
diff --git a/backend/account/views.py b/backend/account/views.py
index 47f646f..4f00a04 100644
--- a/backend/account/views.py
+++ b/backend/account/views.py
@@ -48,7 +48,7 @@ class AccountRegisterDetailView(generics.GenericAPIView):
     permission_classes = (AllowAny,)
 
     @swagger_auto_schema(responses={200: user_response})
-    def post(self, request, *args, **kwargs):
+    def post(self, request, *args, **kwargs) -> Response:
 
         serializer = self.get_serializer(data=request.data)
         serializer.is_valid(raise_exception=True)
@@ -75,7 +75,7 @@ class AccountLoginDetailView(generics.GenericAPIView):
     permission_classes = (AllowAny,)
 
     @swagger_auto_schema(responses={200: user_response})
-    def post(self, request, *args, **kwargs):
+    def post(self, request, *args, **kwargs) -> Response:
         serializer = self.get_serializer(data=request.data)
         serializer.is_valid(raise_exception=True)
         user = serializer.validated_data
@@ -122,7 +122,7 @@ class AccountLogoutView(views.APIView):
 
     permission_classes = (IsAuthenticated,)
 
-    def post(self, request):
+    def post(self, request) -> Response:
 
         try:
 
@@ -158,7 +158,7 @@ class AccountLogoutAllView(views.APIView):
 
     permission_classes = (IsAuthenticated,)
 
-    def post(self, request):
+    def post(self, request) -> Response:
         try:
             tokens = OutstandingToken.objects.filter(user_id=request.user.id)
             for token in tokens:
diff --git a/backend/manage.py b/backend/manage.py
index f2a662c..385e6f2 100755
--- a/backend/manage.py
+++ b/backend/manage.py
@@ -4,7 +4,7 @@
 import sys
 
 
-def main():
+def main() -> None:
     """Run administrative tasks."""
     os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'core.settings')
     try:
diff --git a/backend/order/cart.py b/backend/order/cart.py
index b07c622..b02cec5 100644
--- a/backend/order/cart.py
+++ b/backend/order/cart.py
@@ -3,7 +3,7 @@
 from store.models import Product
 
 class Cart(object):
-    def __init__(self, request):
+    def __init__(self, request: object) -> None:
         self.session = request.session
         cart = self.session.get(settings.CART_SESSION_ID)
 
@@ -12,7 +12,7 @@ def __init__(self, request):
         
         self.cart = cart
 
-    def __iter__(self):
+    def __iter__(self) -> None:
         for p in self.cart.keys():
             self.cart[str(p)]['product'] = Product.objects.get(pk=p)
         
@@ -21,10 +21,10 @@ def __iter__(self):
 
             yield item
     
-    def __len__(self):
+    def __len__(self) -> int:
         return sum(item['quantity'] for item in self.cart.values())
     
-    def add(self, product_id, quantity=1, update_quantity=False):
+    def add(self, product_id, quantity=1, update_quantity=False) -> None:
         product_id = str(product_id)
         
         if product_id not in self.cart:
@@ -38,20 +38,20 @@ def add(self, product_id, quantity=1, update_quantity=False):
                         
         self.save()
     
-    def remove(self, product_id):
+    def remove(self, product_id) -> None:
         if product_id in self.cart:
             del self.cart[product_id]
             self.save()
 
-    def save(self):
+    def save(self) -> None:
         self.session[settings.CART_SESSION_ID] = self.cart
         self.session.modified = True
     
-    def clear(self):
+    def clear(self) -> None:
         del self.session[settings.CART_SESSION_ID]
         self.session.modified = True
     
-    def get_total_cost(self):
+    def get_total_cost(self) -> float:
         for p in self.cart.keys():
             self.cart[str(p)]['product'] = Product.objects.get(pk=p)
 
diff --git a/backend/order/models.py b/backend/order/models.py
index 27444d3..4ac9ee7 100644
--- a/backend/order/models.py
+++ b/backend/order/models.py
@@ -46,7 +46,7 @@ class Meta:
         verbose_name = _("Order")
         verbose_name_plural = _("Orders")
 
-    def save(self, *args, **kwargs):
+    def save(self, *args, **kwargs) -> None:
         """
         If the Order instance is an immediate purchase and not an offer,
         set the amount to be the price of the product.
@@ -62,13 +62,13 @@ def save(self, *args, **kwargs):
 
         super(Order, self).save(*args, **kwargs)
 
-    def get_price(self):
+    def get_price(self) -> float:
         return self.product.price
 
-    def get_absolute_url(self):
+    def get_absolute_url(self) -> str:
         return reverse("order:order_list", args=[self.id])
 
-    def __str__(self):
+    def __str__(self) -> str:
         return f"Product {self.product.title} ordered by {self.buyer.name}"
 
 
@@ -95,15 +95,15 @@ class Meta:
         verbose_name = _("Order Detail")
         verbose_name_plural = _("Order Details")
 
-    def get_absolute_url(self):
+    def get_absolute_url(self) -> str:
         return reverse("orderdetails:orderdetails_list", args=[self.id])
 
-    def __str__(self):
+    def __str__(self) -> str:
         return f"Order Details of {self.full_name} on order {self.order.id}"
 
 
 @receiver(pre_delete, sender=Order)
-def reset_product_is_available(sender, instance, **kwargs):
+def reset_product_is_available(sender, instance, **kwargs) -> None:
     """
     Reset an product's availability if an order for that product is deleted.
 
diff --git a/backend/order/serializers.py b/backend/order/serializers.py
index 7ca1da3..205fd3c 100644
--- a/backend/order/serializers.py
+++ b/backend/order/serializers.py
@@ -82,7 +82,7 @@ class Meta:
         }
         extra_kwargs = {"amount": {"required": False}, "order_detail": {"required": False}}
 
-    def validate(self, data):
+    def validate(self, data: dict) -> dict:
         """
         Check if product is avaialable or if it is already in the buyer's orders.
         Ensure an offer is never more than the price of the product.
@@ -112,7 +112,7 @@ def validate(self, data):
 
         return data
 
-    def create(self, validated_data):
+    def create(self, validated_data: dict) -> Order:
         request = self.context["request"]
         buyer = request.user.vendor
         # buyer = Vendor.objects.get(created_by=request.user.vendor)
@@ -138,7 +138,7 @@ def create(self, validated_data):
 
         return instance
 
-    def update(self, instance, validated_data):
+    def update(self, instance, validated_data: dict) -> Order:
 
         user = self.context["request"].user.vendor
 
diff --git a/backend/order/views.py b/backend/order/views.py
index 203d4a6..9aef73c 100644
--- a/backend/order/views.py
+++ b/backend/order/views.py
@@ -100,7 +100,7 @@ class OrderItemCheckout(generics.CreateAPIView):
     Checkout POST.
     """
 
-    def post(self, request, *args, **kwargs):
+    def post(self, request, *args, **kwargs) -> Response:
         body = request.POST.get("body")
         order_item = OrderModel.objects.create(
             product=body["product"],
diff --git a/backend/store/models.py b/backend/store/models.py
index 9cf5c77..37f27b1 100644
--- a/backend/store/models.py
+++ b/backend/store/models.py
@@ -22,11 +22,11 @@
 )
 
 
-def upload_path(instance, filename):
+def upload_path(instance, filename: str) -> str:
     return "/".join(["images", str(instance.name), filename])
 
 
-def rand_slug():
+def rand_slug() -> str:
     return "".join(random.choice(string.ascii_letters + string.digits) for _ in range(6))
 
 
@@ -54,15 +54,15 @@ class Meta:
         verbose_name = _("Category")
         verbose_name_plural = _("Categories")
 
-    def get_absolute_url(self):
+    def get_absolute_url(self) -> str:
         return reverse("store:category_list", args=[self.slug])
 
-    def save(self, *args, **kwargs):
+    def save(self, *args, **kwargs) -> None:
         if not self.slug:
             self.slug = slugify(rand_slug() + "-" + self.name)
         super(Category, self).save(*args, **kwargs)
 
-    def get_slug_list(self):
+    def get_slug_list(self) -> list:
         try:
             ancestors = self.get_ancestors(include_self=True)
         except:
@@ -129,20 +129,20 @@ class Meta:
         verbose_name = _("Product")
         verbose_name_plural = _("Products")
 
-    def get_absolute_url(self):
+    def get_absolute_url(self) -> str:
         return reverse("store:product-detail", args=[self.slug])
 
-    def save(self, *args, **kwargs):
+    def save(self, *args, **kwargs) -> None:
 
         if not self.slug:
             self.slug = slugify(self.title)
 
         super(Product, self).save(*args, **kwargs)
 
-    def __str__(self):
+    def __str__(self) -> str:
         return self.title
 
-    def __unicode__(self):
+    def __unicode__(self) -> str:
         return self.title
 
 
@@ -185,23 +185,23 @@ class Meta:
         verbose_name_plural = _("Versatile Images")
         UniqueConstraint(fields=["is_feature"], condition=Q(is_feature=True), name="is_feature_is_unique")
 
-    def get_thumbnail(self):
+    def get_thumbnail(self) -> str:
         if self.image:
             thumbnail = self.make_thumbnail(self.image)
             return thumbnail
         else:
             return "https://via.placeholder.com/240x180.jpg"
 
-    def make_thumbnail(self, image, size=("240x180")):
+    def make_thumbnail(self, image, size=("240x180")) -> str:
         return image.thumbnail[size].url
 
-    def __str__(self):
+    def __str__(self) -> str:
         return self.name
 
-    def __unicode__(self):
+    def __unicode__(self) -> str:
         return self.name
 
-    def save(self, *args, **kwargs):
+    def save(self, *args, **kwargs) -> None:
         if not self.name:
             if self.is_feature:
                 self.name = self.product.title + "-" + "feature" + "-" + rand_slug()
@@ -215,7 +215,7 @@ def save(self, *args, **kwargs):
 
 
 @receiver(post_save, sender=Image)
-def warm_image_instances_post_save(sender, instance, **kwargs):
+def warm_image_instances_post_save(sender, instance, **kwargs) -> None:
     """Ensures Image objects are created post-save"""
     all_img_warmer = VersatileImageFieldWarmer(
         instance_or_queryset=instance, rendition_key_set="default_product", image_attr="image", verbose=True
@@ -233,12 +233,12 @@ class Meta:
         verbose_name = _("Favorite Product")
         verbose_name_plural = _("Favorite Products")
 
-    def __str__(self):
+    def __str__(self) -> str:
         return "%s's favorites" % self.vendor.name
 
 
 @receiver(pre_delete, sender=Product)
-def delete_category_if_null(sender, instance, **kwargs):
+def delete_category_if_null(sender, instance, **kwargs) -> None:
     """
     Delete category objects if it has no other related products.
 
diff --git a/backend/store/schema.py b/backend/store/schema.py
index a45f64c..4c66c98 100644
--- a/backend/store/schema.py
+++ b/backend/store/schema.py
@@ -25,7 +25,7 @@ class Meta:
             "updated_at",
         )
 
-    def resolve_image(self, info):
+    def resolve_image(self, info) -> str:
         if self.image:
             self.image = info.context.build_absolute_uri(self.image.url)
         return self.image
@@ -57,20 +57,20 @@ class Query(graphene.ObjectType):
         ProductType, slug=graphene.String(required=True)
     )
 
-    def resolve_category_by_name(self, info, name):
+    def resolve_category_by_name(self, info, name) -> CategoryType:
         try:
             return Category.objects.get(name=name)
         except Category.DoesNotExist:
             return None
 
-    def resolve_all_Products_by_name(self, info, slug):
+    def resolve_all_Products_by_name(self, info, slug) -> ProductType:
         try:
             return Product.objects.get(slug=slug)
         except Product.DoesNotExist:
             return None
 
-    def resolve_all_Categories(self, info):
+    def resolve_all_Categories(self, info) -> CategoryType:
         return Category.objects.filter(level=1)
 
-    def resolve_all_Products(self, info):
+    def resolve_all_Products(self, info) -> ProductType:
         return Product.objects.all()
diff --git a/backend/store/serializers.py b/backend/store/serializers.py
index fbb7dce..859fd37 100644
--- a/backend/store/serializers.py
+++ b/backend/store/serializers.py
@@ -27,12 +27,12 @@ class Meta:
 
 
 class RawProductSlugSerializer(serializers.BaseSerializer):
-    def to_representation(self, obj):
+    def to_representation(self, obj) -> str:
         return obj.slug
 
 
 class RawIdSerializer(serializers.BaseSerializer):
-    def to_representation(self, obj):
+    def to_representation(self, obj) -> str:
         return obj.id
 
 
@@ -57,29 +57,29 @@ class Meta:
             "orders_made",
         ]
 
-    def get_order_count(self, obj):
+    def get_order_count(self, obj) -> int:
         return order_models.Order.objects.filter(Q(vendor=obj) | Q(buyer=obj)).distinct().count()
 
-    def get_product_count(self, obj):
+    def get_product_count(self, obj) -> int:
         return Product.objects.filter(vendor=obj).count()
 
-    def get_favorites(self, obj):
+    def get_favorites(self, obj) -> int:
         favorites, created = Favorite.objects.get_or_create(vendor=obj)
         favorite_products = obj.favorites.favorites.all()
         product_serializer = RawProductSlugSerializer(favorite_products, many=True)
         return product_serializer.data
 
-    def get_order_requests(self, obj):
+    def get_order_requests(self, obj) -> int:
         order_requests = order_models.Order.objects.filter(vendor=obj)
         order_serializer = RawIdSerializer(order_requests, many=True)
         return order_serializer.data
 
-    def get_orders_made(self, obj):
+    def get_orders_made(self, obj) -> int:
         orders_made = order_models.Order.objects.filter(buyer=obj)
         order_serializer = RawIdSerializer(orders_made, many=True)
         return order_serializer.data
 
-    def get_product_count(self, obj):
+    def get_product_count(self, obj) -> int:
         return Product.objects.filter(vendor=obj).count()
 
 
@@ -122,7 +122,7 @@ class Meta:
             "image": {"required": True},
         }
 
-    def create(self, validated_data):
+    def create(self, validated_data) -> Image:
         instance = Image.objects.create(
             product=validated_data.get("product"),
             is_feature=validated_data.get("is_feature", False),
@@ -148,7 +148,7 @@ class Meta:
 
 
 class RawOrderStatusSerializer(serializers.BaseSerializer):
-    def to_representation(self, obj):
+    def to_representation(self, obj) -> str:
         return obj.status
 
 
@@ -177,7 +177,7 @@ class Meta:
             "product_images",
         ]
 
-    def get_image(self, obj):
+    def get_image(self, obj) -> str:
         images = Image.objects.filter(product=obj).first()
         if not images:
             return {}
@@ -234,7 +234,7 @@ class Meta:
             "vendor": VendorPreviewSerializer,
         }
 
-    def get_image(self, obj):
+    def get_image(self, obj) -> str:
         images = Image.objects.filter(product=obj).first()
         if images:
             image_serializer = ImageNewSerializer(images)
@@ -269,7 +269,7 @@ class Meta:
             "vendor": VendorPreviewSerializer,
         }
 
-    def get_image(self, obj):
+    def get_image(self, obj) -> str:
         images = Image.objects.filter(product=obj).first()
         if images:
             image_serializer = ImageNewSerializer(images)
@@ -316,7 +316,7 @@ class Meta:
             "ordered_product": {"required": False},
         }
 
-    def get_similar_products(self, obj):
+    def get_similar_products(self, obj) -> list:
         similar_products = list(obj.category.products.exclude(id=obj.id))
 
         if len(similar_products) >= 4:
@@ -325,14 +325,14 @@ def get_similar_products(self, obj):
         product_serializer = ProductSimilarSerializer(similar_products, many=True)
         return product_serializer.data
 
-    def get_image(self, obj):
+    def get_image(self, obj) -> str:
         images = Image.objects.filter(product=obj).first()
         if images:
             image_serializer = ImageNewSerializer(images)
             return image_serializer.data.get("image")
         return image_serializer.data
 
-    def create(self, validated_data):
+    def create(self, validated_data) -> Product:
         vendor = self.context["request"].user.vendor
 
         print("images field", self.context["request"].data["images"])
@@ -362,7 +362,7 @@ def create(self, validated_data):
 
         return instance
 
-    def update(self, instance, validated_data):
+    def update(self, instance, validated_data) -> Product:
         request = self.context["request"]
         vendor = request.user.vendor
 
diff --git a/backend/store/views.py b/backend/store/views.py
index c7ab506..7a8c02c 100644
--- a/backend/store/views.py
+++ b/backend/store/views.py
@@ -65,7 +65,7 @@ class ProductImagesByProductId(generics.ListAPIView):
     Endpoint: `api/store/images/<id>`
     """
 
-    def get_queryset(self):
+    def get_queryset(self) -> Image:
         """
         The get_queryset function is used to return a QuerySet of all the images associated with the product.
         The get_queryset function takes in self, which represents an instance of ProductDetailView and returns a QuerySet
@@ -90,7 +90,7 @@ class ProductsByVendorView(generics.ListAPIView):
     Endpoint: `api/store/vendor/<slug>`
     """
 
-    def get_queryset(self):
+    def get_queryset(self) -> Product:
         return Product.objects.filter(
             vendor=Vendor.objects.get(slug=self.kwargs["slug"])
         )
@@ -106,7 +106,7 @@ class ProductsByCategory(generics.ListAPIView):
     Endpoint: `api/store/category/<slug>`
     """
 
-    def get_queryset(self):
+    def get_queryset(self) -> Product:
         """
         The get_queryset function is a Django shortcut that allows you to return the queryset of objects for a given model.
         It takes one argument, which is the viewset class itself (in this case, it's ProductListView).
@@ -137,7 +137,7 @@ class ProductsByCategories(generics.ListAPIView):
     products per URL arg
     """
 
-    def get_queryset(self):
+    def get_queryset(self) -> Product:
         """
         The get_queryset function is used to return a filtered queryset of products.
         It takes the kwargs from the URL as input and returns a filtered queryset.
diff --git a/backend/vendor/models.py b/backend/vendor/models.py
index 8685406..02768e5 100644
--- a/backend/vendor/models.py
+++ b/backend/vendor/models.py
@@ -16,7 +16,7 @@
 )
 
 
-def upload_path(instance, filename):
+def upload_path(instance, filename: str) -> str:
     return "/".join(["profiles", str(instance.name), filename])
 
 
@@ -41,26 +41,26 @@ class Meta:
         verbose_name = _("Vendor")
         verbose_name_plural = _("Vendors")
 
-    def __str__(self):
+    def __str__(self) -> str:
         return self.name
 
-    def __unicode__(self):
+    def __unicode__(self) -> str:
         return self.name
 
-    def get_absolute_url(self):
+    def get_absolute_url(self) -> str:
         return reverse("vendor:vendor_list", args=[self.slug])
 
-    def get_balance(self):
+    def get_balance(self) -> float:
         items = self.items.filter(vendor_paid=False, order__vendors__in=[self.id])
         return sum((item.product.price * item.quantity) for item in items)
 
-    def get_paid_amount(self):
+    def get_paid_amount(self) -> float:
         items = self.items.filter(vendor_paid=True, order__vendors__in=[self.id])
         return sum((item.product.price * item.quantity) for item in items)
 
 
 @receiver(post_save, sender=Vendor)
-def warm_vendor_image(sender, instance, **kwargs):
+def warm_vendor_image(sender, instance, **kwargs) -> None:
     """Ensures Vendor-specific images objects are created post-save"""
     vendor_img_warmer = VersatileImageFieldWarmer(
         instance_or_queryset=instance, rendition_key_set="default_avatar", image_attr="image", verbose=True
@@ -72,15 +72,15 @@ class Friend(models.Model):
     vendors = models.ManyToManyField(Vendor, related_name="vendors")
     current_vendor = models.ForeignKey(Vendor, related_name="owner", null=True, on_delete=models.CASCADE)
 
-    def __str__(self):
+    def __str__(self) -> str:
         return "%s's friends" % self.current_vendor.name
 
     @classmethod
-    def make_friend(cls, current_vendor, other_vendor):
+    def make_friend(cls, current_vendor, other_vendor) -> None:
         friend, created = cls.objects.get_or_create(current_vendor=current_vendor)
         friend.vendors.add(other_vendor)
 
     @classmethod
-    def lose_friend(cls, current_vendor, other_vendor):
+    def lose_friend(cls, current_vendor, other_vendor) -> None:
         friend, created = cls.objects.get_or_create(current_vendor=current_vendor)
         friend.vendors.remove(other_vendor)
diff --git a/backend/vendor/serializers.py b/backend/vendor/serializers.py
index f269602..9ce6e9a 100644
--- a/backend/vendor/serializers.py
+++ b/backend/vendor/serializers.py
@@ -18,7 +18,7 @@
 
 
 class RawProductSlugSerializer(serializers.BaseSerializer):
-    def to_representation(self, obj):
+    def to_representation(self, obj: Product) -> str:
         return obj.slug
 
 
@@ -71,7 +71,7 @@ class Meta:
         ]
         # extra_kwargs = {"image"}
 
-    def get_friends(self, obj):
+    def get_friends(self, obj: Vendor) -> list:
         try:
             friend = Friend.objects.get(current_vendor=obj)
             friends = friend.vendors.all()
@@ -81,12 +81,12 @@ def get_friends(self, obj):
         friends_serializer = VendorFriendSerializer(friends, many=True)
         return friends_serializer.data
 
-    def get_products(self, obj):
+    def get_products(self, obj: Vendor) -> list:
         my_products = Product.objects.filter(vendor=obj.id).order_by(Lower("title"))
         product_serializer = ProductSerializer(my_products, many=True)
         return product_serializer.data
 
-    def get_friends_products(self, obj):
+    def get_friends_products(self, obj: Vendor) -> list:
         try:
             friend = Friend.objects.get(current_vendor=obj)
             friends = friend.vendors.all()
@@ -97,16 +97,16 @@ def get_friends_products(self, obj):
         product_serializer = ProductSerializer(friends_products, many=True)
         return product_serializer.data
 
-    def get_favorites(self, obj):
+    def get_favorites(self, obj: Vendor) -> list:
         favorites, created = Favorite.objects.get_or_create(vendor=obj)
         favorite_products = obj.favorites.favorites.all()
         product_serializer = ProductSerializer(favorite_products, many=True)
         return product_serializer.data
 
-    def get_order_count(self, obj):
+    def get_order_count(self, obj: Vendor) -> int:
         return order_models.Order.objects.filter(Q(vendor=obj) | Q(buyer=obj)).distinct().count()
 
-    def get_product_count(self, obj):
+    def get_product_count(self, obj: Vendor) -> int:
         return Product.objects.filter(vendor=obj).count()
 
 
@@ -150,18 +150,18 @@ class Meta:
             "product_count",
         ]
 
-    def get_products(self, obj):
+    def get_products(self, obj: Vendor) -> list:
         their_products = Product.objects.filter(vendor=obj.id).order_by(Lower("title"))
         product_serializer = ProductSerializer(their_products, many=True)
         return product_serializer.data
 
-    def get_order_count(self, obj):
+    def get_order_count(self, obj: Vendor) -> int:
         return order_models.Order.objects.filter(Q(vendor=obj) | Q(buyer=obj)).distinct().count()
 
-    def get_product_count(self, obj):
+    def get_product_count(self, obj: Vendor) -> int:
         return Product.objects.filter(vendor=obj).count()
 
-    def get_favorites(self, obj):
+    def get_favorites(self, obj: Vendor) -> list:
         favorites, created = Favorite.objects.get_or_create(vendor=obj)
         favorite_products = obj.favorites.favorites.all()
         product_serializer = ProductSerializer(favorite_products, many=True)
@@ -220,13 +220,13 @@ class Meta:
             "slug",
         ]
 
-    def get_order_count(self, obj):
+    def get_order_count(self, obj: Vendor) -> int:
         return order_models.Order.objects.filter(Q(vendor=obj) | Q(buyer=obj)).distinct().count()
 
-    def get_product_count(self, obj):
+    def get_product_count(self, obj: Vendor) -> int:
         return Product.objects.filter(vendor=obj).count()
 
-    def get_favorites(self, obj):
+    def get_favorites(self, obj: Vendor) -> list:
         favorites, created = Favorite.objects.get_or_create(vendor=obj)
         favorite_products = obj.favorites.favorites.all()
         product_serializer = RawProductSlugSerializer(favorite_products, many=True)
diff --git a/backend/vendor/views.py b/backend/vendor/views.py
index 5f05373..4e5f604 100644
--- a/backend/vendor/views.py
+++ b/backend/vendor/views.py
@@ -46,7 +46,7 @@ class VendorDetailAuthView(generics.RetrieveAPIView):
     ]
     serializer_class = CurrentVendorSerializer
 
-    def get_object(self):
+    def get_object(self) -> Vendor:
         """
         The get_object function is used to retrieve the object that the view will
         render to JSON. In this case, it returns a vendor instance based on the primary
@@ -111,7 +111,7 @@ class VendorFavoriteListView(generics.ListCreateAPIView):
     queryset = Favorite.objects.all()
     permission_classes = (AllowAny,)
 
-    def get_queryset(self):
+    def get_queryset(self) -> list:
         """
         The get_queryset function is used to return a QuerySet of all the favorites for a particular vendor.
         It takes in the id of the vendor as an argument, and then uses that id to filter through all of our
@@ -128,7 +128,7 @@ def get_queryset(self):
         favorites_obj = get_object_or_404(self.queryset, vendor=vendor)
         return favorites_obj.favorites.all()
 
-    def post(self, request, id):
+    def post(self, request, id) -> Response:
         """
         The post function allows the user to add a product to their favorites list.
         It takes in an id of a vendor and the id of a product, and adds that product
@@ -152,7 +152,7 @@ def post(self, request, id):
             status=status.HTTP_200_OK,
         )
 
-    def delete(self, request, id):
+    def delete(self, request, id) -> Response:
         """
         The delete function is used to remove a product from the favorites list of a vendor.
         It takes in an id for the vendor and an id for the product as parameters. It then finds
@@ -187,7 +187,7 @@ class VendorFriendsListView(generics.ListCreateAPIView):
     permission_classes = (IsAuthenticatedOrReadOnly,)
     queryset = Friend.objects.all()
 
-    def get_queryset(self):
+    def get_queryset(self) -> list:
         """
         The get_queryset function is used to return a QuerySet of all the vendors that are friends with the vendor
         that owns this view. This function is called by Django when it needs to retrieve data for this view.
@@ -202,7 +202,7 @@ def get_queryset(self):
         friends_obj = Friend.objects.get_or_create(current_vendor=vendor)
         return friends_obj.vendors.all()
 
-    def post(self, request, id):
+    def post(self, request, id) -> Response:
         """
         The post function allows a vendor to add another vendor as a friend.
         It takes the id of the current vendor and the other_vendor_id, which is
@@ -226,7 +226,7 @@ def post(self, request, id):
             status=status.HTTP_200_OK,
         )
 
-    def delete(self, request, id):
+    def delete(self, request, id) -> Response:
         """
         The delete function is used to remove a vendor from the friends list of another vendor.
         It takes in an id for the current_vendor and then removes that vendor from the other_vendor's friends list.