shopify-webhooks

Receive Shopify webhooks in your app without any middleware.

Installation

$ npm install -S shopify-webhooks

API

registerWebhook

function registerWebhook(options: {
	address: string;
	topic: Topic;
	accessToken: string;
	shop: string;
	apiVersion: ApiVersion;
}): Promise<{ 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<Payload = any>(options: {
    secret: string;
    headers: Record<string, string>;
    rawBody: string;
}): Promise<{
	statusCode: StatusCode.Accepted | StatusCode.Forbidden;
	webhookState: WebhookState<Payload> | null;
}>;

Validates the HMAC from headers and extracts webhook data.

Usage

Example using Zeit Now serverless functions

Register a webhook

import { NowRequest, NowResponse } from "@now/node";
import { registerWebhook, ApiVersion } from "shopify-webhooks";

async function zeitNowRegisterWebhook(req: NowRequest, res: NowResponse) {
    const registration = await registerWebhook({
        address: `https://${APP_URL}/api/webhooks/app/uninstalled`,
        topic: "app/uninstalled",
        accessToken: req.cookies.shopifyToken,
        shop: req.cookies.shopOrigin,
        apiVersion: ApiVersion.January20,
    });
    
    if (registration.success) {
        console.log(`Successfully registered webhook "app/uninstalled"`);
    } else {
        console.log(`Failed to register webhook "app/uninstalled";`, JSON.stringify(registration.result, null, 4));
    }
}

Receive a webhook

import { NowRequest, NowResponse } from "@now/node";
import getRawBody from "raw-body";
import { receiveWebhook } from "shopify-webhooks";

async function zeitNowReceiveWebhook(req: NowRequest, res: NowResponse) {
	const rawBody = await getRawBody(req);

	const { statusCode, webhookState } = await receiveWebhook({
		secret: SHOPIFY_API_SECRET_KEY,
		headers: req.headers as Record<string, string>,
		rawBody: rawBody.toString(),
	});

	if (statusCode === StatusCode.Forbidden || webhookState === null) {
		res.status(StatusCode.Forbidden).end();
	} else {
		res.status(200).end();
	}

	console.log("webhookState", webhookState);
}

Gotchas

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

In your terminal $ npm install -S isomorphic-fetch

In your app import "isomorphic-fetch"

OR

require("isomorphic-fetch")