Webhooks
How to Process Chainlink Price Feeds with Parsiq Smart Triggers in NodeJs Web Applications via Webhook Transport
Prerequisites
Tutorial requires NodeJs, npm and Ngrock. Use the following resources to get these:
In this tutorial we demonstrate how to set up a Chainlink price feed Smart Trigger webhook for a NodeJs web application. In this example, we will be using Ngrok to expose a local environment port to the internet and then creating a Smart Trigger for sending Chainlink Oracle price feeds though a webhook.
We create a basic web application running on
localhost:3000 which takes a message via POST method and sends confirmation in a response object. We then use a Chainlink price feed to create a Smart Trigger with a webhook to send to our application. We are using Express for processing our requests.Step 1 - Create Web Application
- Create a directory and cd into it1$ mkdir prq-webhook && cd prq-webhookCopied!
- Initialize Node app1$ npm initCopied!
- Create index.js1$ touch index.jsCopied!
- Install Express1$ npm install expressCopied!
- Put the following in index.jsindex.js1const express = require('express')2const app = express()34app.use(express.json())5app.post('/', (req, res) => res.json(req.body))678const port = process.env.PORT || 30009app.listen(port, () => console.log(Application listening on port ${port}))Copied!
Step 2 - Ngrok
- Start Ngrok instance on port
3000 - 1$ ngrok http 3000Copied!
Step 3 - Create Webhook
- Login to PARSIQ account. Create a webhook transport then set the ngrok forwarding address to the transport URL
Step 4 - Create Smart Trigger
- Create price feed Smart Trigger and set webhook transport as the Delivery method
Step 5 - Start Application and Deploy Smart Trigger
- Run the node application and click 'Deploy' from the Smart Trigger page in PARSIQ account
- 1$ node index.jsCopied!
Chainlink Price Feed Smart Trigger
- In a few minutes you should see the data from the smart trigger in your application.
Smart Trigger Price Feed Data in Application
Last modified 4mo ago