feat: Implement getInvoices graphQL query

packages/backend/src/helpers/billing/paddle.ee.ts

@@ -1,5 +1,6 @@
 import axios from 'axios';
 import appConfig from '../../config/app';
+import { DateTime } from 'luxon';
 
 const PADDLE_VENDOR_URL = appConfig.isDev
   ? 'https://sandbox-vendors.paddle.com'
@@ -22,8 +23,29 @@ const getSubscription = async (subscriptionId: number) => {
   return subscription;
 };
 
+const getInvoices = async (subscriptionId: number) => {
+  const data = {
+    vendor_id: appConfig.paddleVendorId,
+    vendor_auth_code: appConfig.paddleVendorAuthCode,
+    subscription_id: subscriptionId,
+    is_paid: 1,
+    from: DateTime.now().minus({ years: 3 }).toISODate(),
+    to: DateTime.now().plus({ days: 3 }).toISODate(),
+  };
+
+  const response = await axiosInstance.post(
+    '/api/2.0/subscription/payments',
+    data
+  );
+
+  const invoices = response.data.response;
+
+  return invoices;
+};
+
 const paddleClient = {
   getSubscription,
+  getInvoices,
 };
 
 export default paddleClient;