Real-Time Triggers, commonly known as webhooks, are pivotal in integrating real-time data into Web3 applications. They enable instantaneous data access, prompt notifications, dynamic interactions, enhanced user experiences, automation, and streamlined workflows.

This document provides a step-by-step guide on implementing Real-Time Triggers in your Web3 applications.

Prerequisites

• Familiarity with ZettaBlock's APIs.
• Understanding of HTTP request methods and JSON format.

General Implementation Steps

Step 1: Write a Query

Choose the relevant data tables and write your desired logic. Keep in mind that webhooks are currently only supported for real-time (postgreSQL) tables.

Step 2: Create a Real-Time API

Create a one-click-ready API endpoint based on your query. Set your primary key and indexers depending on your logic.

Step 3: Create and Test a Webhook

In the API settings, select 'Create a Trigger'.

Configuration:

• Destination URL: Specify where the webhook should send data.
• Granularity: Choose between PerRecord and PerBatch.
• Format is automatically set to JSON.
• Testing: Use a testing tool to simulate events and verify the webhook's response.

Error Handling and Debugging

• Logs: Monitor webhook logs for errors or unexpected behavior.

• Status Codes: Pay attention to (external) HTTP status codes for success (200 OK), client errors (4xx), and server errors (5xx).
• Retry Logic: Implement retry mechanisms for failed webhook deliveries.

Example: Real-Time Notifications for High-Value ETH Transfers

This example demonstrates setting up a Real-Time Trigger in ZettaBlock for monitoring Ethereum transfers exceeding 50 ETH. The webhook will notify a specified Telegram channel upon detecting such transfers.

Step 1: Write a Query

SELECT
  from_address,
  transaction_hash,
  amount
FROM
  (
    SELECT
      from_address,
      transaction_hash,
      (CAST(VALUE as numeric) / POW(10, 18)) AS amount
    FROM
      ethereum_mainnet.native_token_transfers
    WHERE
      block_date = CURRENT_DATE
  ) AS subquery
WHERE
  amount > 50
GROUP BY
  1,
  2,
  3

Step 2: Create a Real-Time API

In this case, set your primary key to transaction_hash and trace_index .

Step 3: Create and Test a Webhook

Configuration:

• Destination URL: Enter the webhook URL provided by your Telegram bot.
• Granularity: Set to PerRecord to trigger notifications for each qualifying transaction.

With this setup, you receive real-time Telegram notifications for high-value ETH transfers, effectively utilizing ZettaBlock's Real-Time Triggers. These notifications not only keep you informed but also empower you to take immediate action.

Upon receiving a notification, you have the option to manually monitor the involved addresses more closely - however, you can also further automate this process.

The real-time data provided by these webhooks can be integrated into your own trading systems. For instance, you could automate a trading bot to initiate specific actions in response to these high-value transactions. The webhook acts as a trigger, setting off predefined trading strategies or adjustments in your bot, based on the nature and scale of the transactions detected.