Initial work, copied from the Shopify provider

framework/saleor/utils/queries/get-checkout-query.ts

@@ -0,0 +1,65 @@
+export const checkoutDetailsFragment = `
+  id
+  webUrl
+  subtotalPriceV2{
+    amount
+    currencyCode
+  }
+  totalTaxV2 {
+    amount
+    currencyCode
+  }
+  totalPriceV2 {
+    amount
+    currencyCode
+  }
+  completedAt
+  createdAt
+  taxesIncluded
+  lineItems(first: 250) {
+    pageInfo {
+      hasNextPage
+      hasPreviousPage
+    }
+    edges {
+      node {
+        id
+        title
+        variant {
+          id
+          sku
+          title
+          image {
+            originalSrc
+            altText
+            width
+            height
+          }
+          priceV2{
+            amount
+            currencyCode
+          }
+          compareAtPriceV2{
+            amount
+            currencyCode
+          }
+          product {
+            handle
+          }
+        }
+        quantity
+      }
+    }
+  }
+`
+
+const getCheckoutQuery = /* GraphQL */ `
+  query($checkoutId: ID!) {
+    node(id: $checkoutId) {
+      ... on Checkout {
+        ${checkoutDetailsFragment}
+      }
+    }
+  }
+`
+export default getCheckoutQuery