Failed to process webhook: Error: No webhook is registered for topic app_subscriptions/update

[malluAppMaker]

Hi,

I have been using the webhook "app_subscriptions/update" without any error for a year I think. But all of a sudden I am getting  errors in the partner dashboard. When I checked the code I can see the following error when a webhook is received. Same happens for uninstall webhook also.

Failed to process webhook: Error: No webhook is registered for topic app_subscriptions/update

Webhook setup as below.

const response = await Shopify.Webhooks.Registry.register({
  shop,
  accessToken,
  path: "/webhooks",
  topic: "APP_UNINSTALLED",
  webhookHandler: async (topic, shop, body) =>{

    console.log('App uninstalled');
//    const obj = JSON.parse(body);
//    console.log(obj);


    delete ACTIVE_SHOPIFY_SHOPS[shop];
  }
    ,
})

router.post("/webhooks", async (ctx) => {
  try {
    console.log("processing webhook");
    await Shopify.Webhooks.Registry.process(ctx.req, ctx.res);
    console.log(`Webhook processed, returned status code 200`);
  } catch (error) {
    console.log(`Failed to process webhook: ${error}`);
  }
});

Can anybody trace the issue ?

The recent update I have done updating koa-shopify-auth library

"@shopify/koa-shopify-auth": "^5.0.3",

[technologytest · Accepted solution]

I can only speak for fixing the uninstall webhook, but I assume it may apply to the /update one as well. Make sure you have the Shopify.Webhooks.Registry.addHandler code above app.prepare. Your router.post code is fine though 

Shopify.Webhooks.Registry.addHandler("APP_UNINSTALLED", {
  path: "/webhooks",
  webhookHandler: async (topic, shop, body) =>
    delete ACTIVE_SHOPIFY_SHOPS[shop],
});

app.prepare().then(async () => {
  const server = new Koa();
  const router = new Router();
  server.keys = [Shopify.Context.API_SECRET_KEY];
  server.use(
    createShopifyAuth({
      async afterAuth(ctx) {
        // Access token and shop available in ctx.state.shopify
        const { shop, accessToken, scope } = ctx.state.shopify;
        const host = ctx.query.host;
        ACTIVE_SHOPIFY_SHOPS[shop] = scope;

        const responses = await Shopify.Webhooks.Registry.register({
          shop,
          accessToken,
          path: "/webhooks",
          topic: "APP_UNINSTALLED",
        });

        if (!responses["APP_UNINSTALLED"].success) {
          console.log(
            `Failed to register APP_UNINSTALLED webhook: ${responses.result}`
          );
        }

        // Redirect to app with shop parameter upon auth
        ctx.redirect(`/?shop=${shop}&host=${host}`);
      },
    })
  );

[malluAppMaker]

Hi @technologytest .

Thanks a lot for the quick solution. Implemented the changes and my webhook issues are completely resolved now for both uninstall & app_subscriptions/update.

[Sharan_oapps]

Can you please explain in detail what happens in the flow of doing so...

[malluAppMaker]

As mentioned before, All my webhooks were failing. After changing the code only the webhooks started working again.

[Sharan_oapps]

Yes all webhooks are working fine after this fix..Thank you..