Solana: Monitor deposit transaction

05 Feb Solana: Monitor deposit transaction

Tracking Deposited Transactions on Solana: A Solution for Rechecking Last Hour Deposits

As a developer building applications on the Solana blockchain, you’re likely interested in tracking deposited transactions. In this article, we’ll explore a solution that allows you to track transferred assets (such as SOL or USDT) and recheck deposits made within the last hour.

What is a Transfer on Solana?

Before diving into our solution, let’s quickly review what a transfer means on Solana:

• A transfer involves sending assets from one address to another.

• In this context, we’re interested in tracking transferred SOL (Solana) or USDT (US Dollar Token) assets.

Using Subscribe Events for New Transactions

To track new transactions, you can use the solana-program-subscriptions library, which provides a simple way to subscribe to event streams on the Solana blockchain. Here’s an example of how you might set up a subscription to receive new transfers:

import { Subscriptions } from 'solana-program/subscriptions';


const appInfo = {

  pubkey: '',

  name: '',

  version: ''

};


// Create a new subscription instance

const subscription = await subscriptions.createSubscription(appInfo);


// Subscribe to the "newTransfer" event

subscription.on('newTransfer', (data) => {

  console.log(Received transfer data: ${JSON.stringify(data)});

});


// Call the createTransfer function to create a new transfer

const transferData = {

  // Your transaction data here

};

await appInfo.createTransfer(transferData);

Rechecking Deposits within the Last Hour

To recheck deposits made within the last hour, you’ll need to use a different approach. One solution is to use the solana-program-subscriptions library’s getEvents function, which allows you to fetch a specific number of events from a subscription in a single request. Here’s an example:

import { Subscriptions } from 'solana-program/subscriptions';


const appInfo = {

  pubkey: '',

  name: '',

  version: ''

};


// Create a new subscription instance

const subscription = await subscriptions.createSubscription(appInfo);


// Get all events for the last hour (1 hour)

const recentEvents = await subscription.getEvents({

  limit: 1000, // fetch up to 1000 events

});


// Filter out any non-recent transfer data

const recentTransfers = recentEvents.filter((event) => event.type === 'newTransfer');


console.log(recentTransfers);

Example Use Cases

Here are some example use cases for this solution:

• Web3.js

  : You can use the solana-program-subscriptions library in your web application’s JavaScript file to fetch recent transactions.

const Sub = require('solana-program/subscriptions');


// Create a new subscription instance

const subscription = await Sub.createSubscription({

  pubkey: 'YOUR_pubkey',

  name: 'RECENT_TRANSFEETS',

  version: '1.0.0',

});


// Fetch recent events

const recentEvents = await subscription.getEvents();

console.log(recentEvents);

• Node.js

  

  : You can use a Node.js module like solana-program-subscriptions to fetch recent transactions.

const { Subscriptions } = require('solana-program/subscriptions');


// Create a new subscription instance

const subscription = await Subscriptions.createSubscription({

  pubkey: 'YOUR_pubkey',

  name: 'RECENT_TRANSFEETS',

  version: '1.0.0'

});


// Fetch recent events

const recentEvents = await subscription.getEvents();

console.log(recentEvents);

These examples demonstrate how you can use the solana-program-subscriptions library to track deposited transactions and recheck deposits made within the last hour on Solana. By following these steps, you’ll be able to build a robust application that provides real-time tracking of assets transferred between addresses.