diff --git a/components/cart/CartItem/CartItem.tsx b/components/cart/CartItem/CartItem.tsx
index 71ab58966..1e9062e91 100644
--- a/components/cart/CartItem/CartItem.tsx
+++ b/components/cart/CartItem/CartItem.tsx
@@ -5,6 +5,7 @@ import Link from 'next/link'
 import s from './CartItem.module.css'
 import { Trash, Plus, Minus } from '@components/icons'
 import { useUI } from '@components/ui/context'
+import type { LineItem } from '@framework/types'
 import usePrice from '@framework/product/use-price'
 import useUpdateItem from '@framework/cart/use-update-item'
 import useRemoveItem from '@framework/cart/use-remove-item'
diff --git a/framework/bigcommerce/api/cart/index.ts b/framework/bigcommerce/api/cart/index.ts
index 8988f3606..007e56ace 100644
--- a/framework/bigcommerce/api/cart/index.ts
+++ b/framework/bigcommerce/api/cart/index.ts
@@ -53,10 +53,7 @@ export type Cart = {
 export type CartHandlers = {
   getCart: BigcommerceHandler<Cart, { cartId?: string }>
   addItem: BigcommerceHandler<Cart, { cartId?: string } & Partial<AddItemBody>>
-  updateItem: BigcommerceHandler<
-    Cart,
-    { cartId?: string } & Partial<UpdateItemBody>
-  >
+  updateItem: BigcommerceHandler<Cart, UpdateItemBody>
   removeItem: BigcommerceHandler<
     Cart,
     { cartId?: string } & Partial<RemoveItemBody>
diff --git a/framework/bigcommerce/types.d.ts b/framework/bigcommerce/types.d.ts
deleted file mode 100644
index d987381e7..000000000
--- a/framework/bigcommerce/types.d.ts
+++ /dev/null
@@ -1,5 +0,0 @@
-interface Cart extends BaseCart {
-  lineItems: LineItem[]
-}
-
-interface LineItem extends BaseLineItem {}
diff --git a/framework/bigcommerce/types.ts b/framework/bigcommerce/types.ts
new file mode 100644
index 000000000..fe1ca6c36
--- /dev/null
+++ b/framework/bigcommerce/types.ts
@@ -0,0 +1,11 @@
+import * as Core from '@commerce/types'
+
+export interface Cart extends Core.Cart {
+  lineItems: LineItem[]
+}
+
+export interface LineItem extends Core.LineItem {}
+
+export interface UpdateLineItemBody extends Core.UpdateLineItemBody {}
+
+export interface UpdateLineItem extends Core.UpdateItemBody {}
diff --git a/framework/commerce/cart/use-cart.tsx b/framework/commerce/cart/use-cart.tsx
index ecc537539..94ccb73fc 100644
--- a/framework/commerce/cart/use-cart.tsx
+++ b/framework/commerce/cart/use-cart.tsx
@@ -1,15 +1,16 @@
 import Cookies from 'js-cookie'
 import type { HookInput, HookFetcher, HookFetcherOptions } from '../utils/types'
 import useData, { ResponseState, SwrOptions } from '../utils/use-data'
+import type { Cart } from '../types'
 import { useCommerce } from '..'
 
 export type CartResponse<Data> = ResponseState<Data> & { isEmpty?: boolean }
 
 export type CartInput = {
-  cartId?: BaseCart['id']
+  cartId?: Cart['id']
 }
 
-export default function useCart<Data extends BaseCart | null>(
+export default function useCart<Data extends Cart | null>(
   options: HookFetcherOptions,
   input: HookInput,
   fetcherFn: HookFetcher<Data, CartInput>,
diff --git a/framework/commerce/types.d.ts b/framework/commerce/types.d.ts
index 9bb996470..9e69ec25d 100644
--- a/framework/commerce/types.d.ts
+++ b/framework/commerce/types.d.ts
@@ -45,105 +45,6 @@ interface ProductPrice {
   extendedListPrice?: number
 }
 
-interface DiscountBase {
-  // The value of the discount, can be an amount or percentage
-  value: number
-}
-
-interface BaseLineItem {
-  id: string
-  variantId: string
-  name: string
-  quantity: number
-  discounts: DiscountBase[]
-  // A human-friendly unique string automatically generated from the product’s name
-  path: string
-  variant: BaseProductVariant
-}
-
-interface Measurement {
-  value: number
-  unit: 'KILOGRAMS' | 'GRAMS' | 'POUNDS' | 'OUNCES'
-}
-
-interface Image {
-  url: string
-  altText?: string
-  width?: number
-  height?: number
-}
-
-interface BaseProductVariant {
-  id: string
-  // The SKU (stock keeping unit) associated with the product variant.
-  sku: string
-  // The product variant’s title, or the product's name.
-  name: string
-  // Whether a customer needs to provide a shipping address when placing
-  // an order for the product variant.
-  requiresShipping: boolean
-  // The product variant’s price after all discounts are applied.
-  price: number
-  // Product variant’s price, as quoted by the manufacturer/distributor.
-  listPrice: number
-  // Image associated with the product variant. Falls back to the product image
-  // if no image is available.
-  image?: Image
-  // Indicates whether this product variant is in stock.
-  isInStock?: boolean
-  // Indicates if the product variant is available for sale.
-  availableForSale?: boolean
-  // The variant's weight. If a weight was not explicitly specified on the
-  // variant this will be the product's weight.
-  weight?: Measurement
-  // The variant's height. If a height was not explicitly specified on the
-  // variant, this will be the product's height.
-  height?: Measurement
-  // The variant's width. If a width was not explicitly specified on the
-  // variant, this will be the product's width.
-  width?: Measurement
-  // The variant's depth. If a depth was not explicitly specified on the
-  // variant, this will be the product's depth.
-  depth?: Measurement
-}
-
-// Shopping cart, a.k.a Checkout
-interface BaseCart {
-  id: string
-  // ID of the customer to which the cart belongs.
-  customerId?: string
-  // The email assigned to this cart
-  email?: string
-  // The date and time when the cart was created.
-  createdAt: string
-  // The currency used for this cart
-  currency: { code: string }
-  // Specifies if taxes are included in the line items.
-  taxesIncluded: boolean
-  lineItems: BaseLineItem[]
-  // The sum of all the prices of all the items in the cart.
-  // Duties, taxes, shipping and discounts excluded.
-  lineItemsSubtotalPrice: number
-  // Price of the cart before duties, shipping and taxes.
-  subtotalPrice: number
-  // The sum of all the prices of all the items in the cart.
-  // Duties, taxes and discounts included.
-  totalPrice: number
-  // Discounts that have been applied on the cart.
-  discounts?: DiscountBase[]
-}
-
-// TODO: Remove this type in favor of BaseCart
-interface Cart2 extends Entity {
-  id: string | undefined
-  currency: { code: string }
-  taxIncluded?: boolean
-  items: Pick<Product, 'id' | 'name' | 'prices'> & CartItem[]
-  subTotal: number | string
-  total: number | string
-  customerId: Customer['id']
-}
-
 interface CartItem extends Entity {
   quantity: number
   productId: Product['id']
diff --git a/framework/commerce/types.ts b/framework/commerce/types.ts
new file mode 100644
index 000000000..3bca844e0
--- /dev/null
+++ b/framework/commerce/types.ts
@@ -0,0 +1,108 @@
+export interface Discount {
+  // The value of the discount, can be an amount or percentage
+  value: number
+}
+
+export interface LineItem {
+  id: string
+  variantId: string
+  name: string
+  quantity: number
+  discounts: Discount[]
+  // A human-friendly unique string automatically generated from the product’s name
+  path: string
+  variant: ProductVariant
+}
+
+export interface Measurement {
+  value: number
+  unit: 'KILOGRAMS' | 'GRAMS' | 'POUNDS' | 'OUNCES'
+}
+
+export interface Image {
+  url: string
+  altText?: string
+  width?: number
+  height?: number
+}
+
+export interface ProductVariant {
+  id: string
+  // The SKU (stock keeping unit) associated with the product variant.
+  sku: string
+  // The product variant’s title, or the product's name.
+  name: string
+  // Whether a customer needs to provide a shipping address when placing
+  // an order for the product variant.
+  requiresShipping: boolean
+  // The product variant’s price after all discounts are applied.
+  price: number
+  // Product variant’s price, as quoted by the manufacturer/distributor.
+  listPrice: number
+  // Image associated with the product variant. Falls back to the product image
+  // if no image is available.
+  image?: Image
+  // Indicates whether this product variant is in stock.
+  isInStock?: boolean
+  // Indicates if the product variant is available for sale.
+  availableForSale?: boolean
+  // The variant's weight. If a weight was not explicitly specified on the
+  // variant this will be the product's weight.
+  weight?: Measurement
+  // The variant's height. If a height was not explicitly specified on the
+  // variant, this will be the product's height.
+  height?: Measurement
+  // The variant's width. If a width was not explicitly specified on the
+  // variant, this will be the product's width.
+  width?: Measurement
+  // The variant's depth. If a depth was not explicitly specified on the
+  // variant, this will be the product's depth.
+  depth?: Measurement
+}
+
+// Shopping cart, a.k.a Checkout
+export interface Cart {
+  id: string
+  // ID of the customer to which the cart belongs.
+  customerId?: string
+  // The email assigned to this cart
+  email?: string
+  // The date and time when the cart was created.
+  createdAt: string
+  // The currency used for this cart
+  currency: { code: string }
+  // Specifies if taxes are included in the line items.
+  taxesIncluded: boolean
+  lineItems: LineItem[]
+  // The sum of all the prices of all the items in the cart.
+  // Duties, taxes, shipping and discounts excluded.
+  lineItemsSubtotalPrice: number
+  // Price of the cart before duties, shipping and taxes.
+  subtotalPrice: number
+  // The sum of all the prices of all the items in the cart.
+  // Duties, taxes and discounts included.
+  totalPrice: number
+  // Discounts that have been applied on the cart.
+  discounts?: Discount[]
+}
+
+// interface OptionSelections {
+//   option_id: number
+//   option_value: number | string
+// }
+
+export interface LineItemBody {
+  productId: string
+  variantId: string
+  quantity?: number
+  // optionSelections?: OptionSelections
+}
+
+export interface UpdateLineItemBody {
+  itemId: string
+  item: LineItemBody
+}
+
+export interface UpdateItemBody extends Partial<UpdateLineItemBody> {
+  cartId?: string
+}