shopify-currencies.js/dist/index.mjs

Simple wrapper to access Shopify's currency conversion rates from Node.js

import * as vm from 'node:vm';

const SHOPIFY_CDN_URL = "https://cdn.shopify.com/s/javascripts/currencies.js";
async function loadCurrencies() {
  const response = await fetch(SHOPIFY_CDN_URL);
  if (!response.ok) {
    throw new Error(
      `Failed to fetch currencies from Shopify CDN (${SHOPIFY_CDN_URL}): ${response.statusText}`
    );
  }
  const code = await response.text();
  const ctx = {};
  try {
    vm.createContext(ctx);
    vm.runInContext(code, ctx);
  } catch (e) {
    const message = e instanceof Error ? e.message : "Unknown error";
    throw new Error(
      `Failed to parse currencies from Shopify CDN (${SHOPIFY_CDN_URL}): ${message}`
    );
  }
  if (!ctx.Currency || typeof ctx.Currency !== "object") {
    throw new Error("Invalid currencies: Currency is not an object");
  }
  const { rates, convert } = ctx.Currency;
  if (!rates || typeof rates !== "object") {
    throw new Error("Invalid currencies: rates is not an object");
  }
  if (!convert || typeof convert !== "function") {
    throw new Error("Invalid currencies: convert is not a function");
  }
  return { rates, convert };
}

export { loadCurrencies };