Total control over Shopify shipping rates.Your rules. Your logic. Your way.

import { enrichItemDetails } from "./modules.js"; // enriches cart data with additional information

export async function calculateShippingRates(DATA, env) {
  // Use DATA (e.g. DATA.destination.country) and env (your stored variables)
  try {
    // Optional: enrich cart data with tags, metafields, etc.
    await enrichItemDetails(DATA);

    // Example logic: offer free shipping over $100, else $10
    const totalPrice = DATA.items.reduce(
      (sum, item) => sum + (item.price * item.quantity) / 100,
      0
    );
    console.log("total price", totalPrice);

    const rates = [];

    if (totalPrice >= 100) {
      rates.push({
        service_name: "Free Shipping",
        service_code: "FREE",
        total_price: 0,
        description: "Free shipping for orders over $100",
        currency: DATA.currency,
      });
    } else {
      rates.push({
        service_name: "Standard Shipping",
        service_code: "STD",
        total_price: 1000, // $10 shipping fee
        description: "Standard shipping rate for all orders",
        currency: DATA.currency,
      });
    }

    return { rates };
  } catch (error) {
    console.error("Error", error.message);
    return {
      rates: [
        {
          service_name: "Shipping Rate Error",
          service_code: "ERROR",
          total_price: null,
          description: "Unable to calculate shipping rate",
          currency: "",
        },
      ],
    };
  }
}