koa-shopify-webhooks

@shopify/koa-shopify-webhooks

Register and receive webhooks from Shopify with ease. This package was created primarily for use with @shopify/koa-shopify-auth and friends.

Installation

yarn add @shopify/koa-shopify-webhooks

API

registerWebhook

function registerWebhook(options: {
  address: string;
  topic: Topic;
  format: string;
  accessToken: string;
  shop: string;
  apiVersion: ApiVersion;
}): {success: boolean; result: any};

Registers a webhook for the given topic which will send requests to the given address. Returns an object with success true / false to indicate success or failure, as well as the parsed JSON of the response from Shopify. This function will throw if the fetch request it makes encounters an error.

receiveWebhook

function receiveWebhook({
  secret: string;
  // only respond to requests to this path
  path?: string;
  // call this function when a valid webhook is received
  onReceived?(ctx: Context, next: () => unknown);
}): Middleware;

Creates a middleware that will verify whether incoming requests are legitimately from Shopify. Extracts webhook data into context or terminates the middleware chain.

Usage

Example app

import 'isomorphic-fetch';

import Koa from 'koa';
import session from 'koa-session';
import shopifyAuth, {verifyRequest} from '@shopify/koa-shopify-auth';
// Import our package
import {receiveWebhook, registerWebhook} from '@shopify/koa-shopify-webhooks';

const {SHOPIFY_API_KEY, SHOPIFY_SECRET} = process.env;

const app = new Koa();

app.keys = [SHOPIFY_SECRET];

app.use(session(app));
app.use(
  shopifyAuth({
    apiKey: SHOPIFY_API_KEY,
    secret: SHOPIFY_SECRET,
    scopes: ['write_orders, write_products'],
    async afterAuth(ctx) {
      const {shop, accessToken} = ctx.session;

      // register a webhook for product creation
      const registration = await registerWebhook({
        // for local dev you probably want ngrok or something similar
        address: 'www.mycool-app.com/webhooks/products/create',
        topic: 'PRODUCTS_CREATE',
        accessToken,
        shop,
        apiVersion: 'unstable',
      });

      if (registration.success) {
        console.log('Successfully registered webhook!');
      } else {
        console.log('Failed to register webhook', registration.result);
      }

      ctx.redirect('/');
    },
  }),
);

app.use(
  // receive webhooks
  receiveWebhook({
    path: '/webhooks/products/create',
    secret: SHOPIFY_SECRET,
    // called when a valid webhook is received
    onReceived(ctx) {
      console.log('received webhook: ', ctx.state.webhook);
    },
  }),
);

app.use(verifyRequest());

app.use((ctx) => {
  /* app code */
});

koa-router and multiple webhooks

import 'isomorphic-fetch';

import Koa from 'koa';
import router from 'koa-router';
import session from 'koa-session';
import shopifyAuth, {verifyRequest} from '@shopify/koa-shopify-auth';
// Import our package
import {receiveWebhook, registerWebhook} from '@shopify/koa-shopify-webhooks';

const {SHOPIFY_API_KEY, SHOPIFY_SECRET} = process.env;

const app = new Koa();
const router = new Router();

app.keys = [SHOPIFY_SECRET];

app.use(session(app));
app.use(
  shopifyAuth({
    apiKey: SHOPIFY_API_KEY,
    secret: SHOPIFY_SECRET,
    scopes: ['write_orders, write_products'],
    async afterAuth(ctx) {
      const {shop, accessToken} = ctx.session;

      await registerWebhook({
        address: 'www.mycool-app.com/webhooks/products/create',
        topic: 'PRODUCTS_CREATE',
        accessToken,
        shop,
        apiVersion: 'unstable',
      });

      await registerWebhook({
        address: 'www.mycool-app.com/webhooks/orders/create',
        topic: 'ORDERS_CREATE',
        accessToken,
        shop,
        apiVersion: 'unstable',
      });

      ctx.redirect('/');
    },
  }),
);

const webhook = receiveWebhook({secret: SHOPIFY_SECRET});

router.post('/webhooks/products/create', webhook, () => {
  /* handle products create */
});
router.post('/webhooks/orders/create', webhook, () => {
  /* handle orders create */
});

router.get('*', verifyRequest(), () => {
  /* app code */
});

app.use(router.allowedMethods());
app.use(router.routes());

Gotchas

Make sure to install a fetch polyfill, since internally we use it to make HTTP requests.

In your terminal yarn add isomorphic-fetch

In your app import 'isomorphic-fetch'

OR

require('isomorphic-fetch')