### Install SSLCommerz Node.js Library

Source: https://github.com/sslcommerz/sslcommerz-nodejs/blob/master/readme.md

This command installs the official SSLCommerz LTS package from npm, making it available for use in your Node.js project.

```bash
npm i sslcommerz-lts

```

--------------------------------

### Query Transaction Status by Transaction ID in Node.js

Source: https://github.com/sslcommerz/sslcommerz-nodejs/blob/master/readme.md

This example demonstrates an Express.js endpoint to query the status of a transaction using its transaction ID via the sslcommerz-lts library.

```javascript
//SSLCommerz transactionQueryByTransactionId
//you also use this as internal method
app.get('/transaction-query-by-transaction-id', (req, res) => {
    const data = {
        tran_id:AKHLAKJS5456454,
    };
    const sslcz = new SSLCommerzPayment(store_id, store_passwd, is_live)
    sslcz.transactionQueryByTransactionId(data).then(data => {
        //process the response that got from sslcommerz
        //https://developer.sslcommerz.com/doc/v4/#by-session-id
    });
})
```

--------------------------------

### Validate Transaction after Success or IPN in Node.js

Source: https://github.com/sslcommerz/sslcommerz-nodejs/blob/master/readme.md

This example shows an Express.js route for validating a transaction using the sslcommerz-lts library. It uses the validation ID received from SSLCommerz to confirm the transaction status.

```javascript
//sslcommerz validation 

app.get('/validate', (req, res) => {
    const data = {
        val_id:ADGAHHGDAKJ456454 //that you go from sslcommerz response
    };
    const sslcz = new SSLCommerzPayment(store_id, store_passwd, is_live)
    sslcz.validate(data).then(data => {
        //process the response that got from sslcommerz 
       // https://developer.sslcommerz.com/doc/v4/#order-validation-api
    });
}) 
```

--------------------------------

### Initialize a Transaction with SSLCommerz in Node.js

Source: https://github.com/sslcommerz/sslcommerz-nodejs/blob/master/readme.md

This code snippet demonstrates how to set up an Express.js route to initialize a payment transaction using the sslcommerz-lts library. It configures transaction details and redirects the user to the SSLCommerz payment gateway URL.

```javascript
const express = require('express')
const app = express()

const SSLCommerzPayment = require('sslcommerz-lts')
const store_id = '<your_store_id>'
const store_passwd = '<your_store_password>'
const is_live = false //true for live, false for sandbox

const port = 3030

//sslcommerz init
app.get('/init', (req, res) => {
    const data = {
        total_amount: 100,
        currency: 'BDT',
        tran_id: 'REF123', // use unique tran_id for each api call
        success_url: 'http://localhost:3030/success',
        fail_url: 'http://localhost:3030/fail',
        cancel_url: 'http://localhost:3030/cancel',
        ipn_url: 'http://localhost:3030/ipn',
        shipping_method: 'Courier',
        product_name: 'Computer.',
        product_category: 'Electronic',
        product_profile: 'general',
        cus_name: 'Customer Name',
        cus_email: 'customer@example.com',
        cus_add1: 'Dhaka',
        cus_add2: 'Dhaka',
        cus_city: 'Dhaka',
        cus_state: 'Dhaka',
        cus_postcode: '1000',
        cus_country: 'Bangladesh',
        cus_phone: '01711111111',
        cus_fax: '01711111111',
        ship_name: 'Customer Name',
        ship_add1: 'Dhaka',
        ship_add2: 'Dhaka',
        ship_city: 'Dhaka',
        ship_state: 'Dhaka',
        ship_postcode: 1000,
        ship_country: 'Bangladesh',
    };
    const sslcz = new SSLCommerzPayment(store_id, store_passwd, is_live)
    sslcz.init(data).then(apiResponse => {
        // Redirect the user to payment gateway
        let GatewayPageURL = apiResponse.GatewayPageURL
        res.redirect(GatewayPageURL)
        console.log('Redirecting to: ', GatewayPageURL)
    });
})

app.listen(port, () => {
    console.log(`Example app listening at http://localhost:${port}`)
})
```

--------------------------------

### Initiate Refund via SSLCommerz API in Node.js

Source: https://github.com/sslcommerz/sslcommerz-nodejs/blob/master/readme.md

This snippet demonstrates how to create an Express.js endpoint to initiate a refund for a transaction using the sslcommerz-lts library. It requires the refund amount, remarks, bank transaction ID, and reference ID.

```javascript
//SSLCommerz initiateRefund

app.get('/initiate-refund', (req, res) => {
    const data = {
        refund_amount:10,
        refund_remarks:'',
        bank_tran_id:CB5464321445456456,
        refe_id:EASY5645415455,
    };
    const sslcz = new SSLCommerzPayment(store_id, store_passwd, is_live)
    sslcz.initiateRefund(data).then(data => {
        //process the response that got from sslcommerz 
        //https://developer.sslcommerz.com/doc/v4/#initiate-the-refund
    });
})
```

--------------------------------

### Query Refund Status via SSLCommerz API in Node.js

Source: https://github.com/sslcommerz/sslcommerz-nodejs/blob/master/readme.md

This code shows an Express.js route for querying the status of a previously initiated refund request using the sslcommerz-lts library. It requires the refund reference ID.

```javascript
//SSLCommerz refundQuery

app.get('/refund-query', (req, res) => {
    const data = {
        refund_ref_id:SL4561445410,
    };
    const sslcz = new SSLCommerzPayment(store_id, store_passwd, is_live)
    sslcz.refundQuery(data).then(data => {
        //process the response that got from sslcommerz
        //https://developer.sslcommerz.com/doc/v4/#initiate-the-refund
    });
})
```

--------------------------------

### Query Transaction Status by Session ID in Node.js

Source: https://github.com/sslcommerz/sslcommerz-nodejs/blob/master/readme.md

This snippet shows an Express.js route for querying the status of a transaction using its session key via the sslcommerz-lts library.

```javascript
//SSLCommerz transactionQueryBySessionId
//you also use this as internal method
app.get('/transaction-query-by-session-id', (req, res) => {
    const data = {
        sessionkey:AKHLAKJS5456454,
    };
    const sslcz = new SSLCommerzPayment(store_id, store_passwd, is_live)
    sslcz.transactionQueryBySessionId(data).then(data => {
        //process the response that got from sslcommerz
        //https://developer.sslcommerz.com/doc/v4/#by-session-id
    });
})
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.