E-commerce Order Fulfillment - Upstash Documentation

Introduction#

This example demonstrates an automated e-commerce order fulfillment process using Upstash Workflow. The workflow takes an order, verifies the stock, processes the payment, and handles order dispatch and customer notifications.

Use Case#

Our workflow will:

Receive an order request
Verify the availability of the items in stock
Process the payment
Initiate the dispatch of the order
Send confirmation and delivery notifications to the customer

Code Example#

import { serve } from "@upstash/workflow/nextjs"import {  createOrderId,  checkStockAvailability,  processPayment,  dispatchOrder,  sendOrderConfirmation,  sendDispatchNotification,} from "./utils"type OrderPayload = {  userId: string  items: { productId: string, quantity: number }[]}export const { POST } = serve<OrderPayload>(async (context) => {  const { userId, items } = context.requestPayload;  // Step 1: Create Order Id  const orderId = await context.run("create-order-id", async () => {    return await createOrderId(userId);  });  // Step 2: Verify stock availability  const stockAvailable = await context.run("check-stock", async () => {    return await checkStockAvailability(items);  });  if (!stockAvailable) {    console.warn("Some items are out of stock");    return;  };  // Step 3: Process payment  await context.run("process-payment", async () => {    return await processPayment(orderId)  })  // Step 4: Dispatch the order  await context.run("dispatch-order", async () => {    return await dispatchOrder(orderId, items)  })  // Step 5: Send order confirmation email  await context.run("send-confirmation", async () => {    return await sendOrderConfirmation(userId, orderId)  })  // Step 6: Send dispatch notification  await context.run("send-dispatch-notification", async () => {    return await sendDispatchNotification(userId, orderId)  })})

Code Breakdown#

1. Verifying Stock Availability#

We start by creating an order id and verifying if the items in the order are available in stock. If not, we throw an error to halt the process:

const orderId = await context.run("create-order-id", async () => {  return await createOrderId(userId);});const stockAvailable = await context.run("check-stock", async () => {  return await checkStockAvailability(items)})if (!stockAvailable) {  console.warn("Some items are out of stock")  return;}

2. Processing Payment#

Once the stock is verified, the workflow processes the payment for the order:

await context.run("process-payment", async () => {  return await processPayment(orderId)})

3. Dispatching the Order#

After payment confirmation, we dispatch the order for delivery:

await context.run("dispatch-order", async () => {  return await dispatchOrder(orderId, items)})

4. Sending Confirmation and Notification Emails#

Lastly, we send an order confirmation email to the customer and notify them when the order is dispatched:

await context.run("send-confirmation", async () => {  return await sendOrderConfirmation(userId, orderId)})await context.run("send-dispatch-notification", async () => {  return await sendDispatchNotification(userId, orderId)})

Key Features#

Stock Verification: Ensures items are available in stock before processing the payment, avoiding issues with unavailable products.
Payment Processing: Handles payment securely and only proceeds to dispatch if successful.
Customer Notifications: Keeps the customer informed at each step of the order process, improving user experience.