Automatic POSTBACK

After successful payment execution, a POST request with information about the payment is sent to the notification URL specified in the project settings.

Request parameters

Parameter name	Data type	Value	Example	Description
status	string	success	success	Request execution status
invoice_id	string	id	DZLF4212	Unique payment identifier
amount_crypto	decimal	sum	0.4567	Payment amount in cryptocurrency
currency	string	BTC LTC ETH USDT_TRC20 USDT_ERC20 USDC_TRC20 USDC_ERC20 TUSD_TRC20 TUSD_ERC20	BTC	Currency code
order_id	string	id	ORD99999	Store order identifier
token	string	token	eyJ0eXAiOiJKV1QiLCJhbGciOiJIAcI1NiJ9.eyJpZCI6MTMsImV4cCI6MTYzMTc4NjQyNn0.HQavV3z8dFnk56bX3MSY5X9lR6qVa9YhAoeTEHkaAzs	JWT token

JWT token — response signature from the server. It is signed with a secret key generated in the project settings. Additionally, UUID of the invoice is added to the token. The token is valid for 5 minutes after the notification is created. It is generated each time a payment notification is sent.

The encryption algorithm is HS256.

Response example

{
   "status": "success",
   "invoice_id": “DZLF4212”,
   "amount_crypto": 0.4567,
   "currency": “BTC“,
}

Example of POSTBACK processor

Python

from flask import Flask, request, jsonify

app = Flask(__name__)

@app.route('/postback', methods=['POST'])
def handle_postback():
    data = request.json
    status = data.get('status')
    invoice_id = data.get('invoice_id')
    amount_crypto = data.get('amount_crypto')
    currency = data.get('currency')
    order_id = data.get('order_id')
    token = data.get('token')
    
    # ... your code for processing postback ...
    
    return jsonify({'message': 'Postback received'}), 200

if __name__ == '__main__':
    app.run(port=5000)

JavaScript

const express = require('express');
const app = express();

app.use(express.json());

app.post('/postback', (req, res) => {
    const { status, invoice_id, amount_crypto, currency, order_id, token } = req.body;
    
    // ... your code for processing postback ...
    
    res.json({ message: 'Postback received' });
});

app.listen(3000, () => {
    console.log('Server is running on port 3000');
});