callback.php

<?php
// This file is part of Moodle - https://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <https://www.gnu.org/licenses/>.

/**
 * Plugin administration pages are defined here.
 *
 * @package     paygw_cryptocloud
 * @copyright   2024 Alex Orlov <snickser@gmail.com>
 * @license     https://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

use core_payment\helper;
use paygw_cryptocloud\notifications;
use Firebase\JWT\JWT;
use Firebase\JWT\Key;

require("../../../config.php");
global $CFG, $USER, $DB;

require_once($CFG->libdir . '/filelib.php');

defined('MOODLE_INTERNAL') || die();

$status         = required_param('status', PARAM_TEXT);
$invoiceid      = required_param('invoice_id', PARAM_ALPHANUMEXT);
$amount         = required_param('amount_crypto', PARAM_FLOAT);
$currency       = required_param('currency', PARAM_TEXT);
$orderid        = required_param('order_id', PARAM_INT);
$token          = required_param('token', PARAM_TEXT);


if ($status !== 'success') {
    die('FAIL. Payment not successed.');
}

if (!$cryptocloudtx = $DB->get_record('paygw_cryptocloud', [ 'paymentid' => $orderid, 'invoiceid' => 'INV-' . $invoiceid ])) {
    die('FAIL. Not a valid transaction.');
}

if (!$payment = $DB->get_record('payments', ['id' => $cryptocloudtx->paymentid])) {
    die('FAIL. Not a valid payment.');
}
$component   = $payment->component;
$paymentarea = $payment->paymentarea;
$itemid      = $payment->itemid;
$paymentid   = $payment->id;
$userid      = $payment->userid;

// Get apikey and secretkey.
$config = (object) helper::get_gateway_configuration($component, $paymentarea, $itemid, 'cryptocloud');

$decoded = JWT::decode($token, new Key($config->secretkey, 'HS256'));
if (empty($decoded->id)) {
    die('FAIL. Invalid token.');
}

// Check invoice on site.
$location = 'https://api.cryptocloud.plus/v2/invoice/merchant/info';
$options = [
    'CURLOPT_RETURNTRANSFER' => true,
    'CURLOPT_TIMEOUT' => 30,
    'CURLOPT_HTTPHEADER' => [
        'Content-Type: application/json',
        'Authorization: Token ' . $config->apikey,
    ],
];
$jsondata = json_encode(["uuids" => [$invoiceid]]);

$curl = new curl();
$jsonresponse = $curl->post($location, $jsondata, $options);
$response = json_decode($jsonresponse, false);

// Check invoice status.
if ($response->status !== 'success') {
    die('FAIL. Invoice check not successed.');
}
if ($response->result[0]->invoice_status !== 'success') {
    die('FAIL. Invoice not successed.');
}
if ($response->result[0]->status !== 'paid') {
    die('FAIL. Invoice not paid.');
}

// Deliver order.
helper::deliver_order($component, $paymentarea, $itemid, $paymentid, $userid);

// Notify user.
notifications::notify(
    $userid,
    $payment->amount,
    $payment->currency,
    $paymentid,
    'Success completed'
);

// Update paygw.
if ($response->result[0]->test_mode == true) {
    $cryptocloudtx->success = 3;
} else {
    $cryptocloudtx->success = 1;
}
if (!$DB->update_record('paygw_cryptocloud', $cryptocloudtx)) {
    die('FAIL. Update db error.');
} else {
    echo json_encode(['message' => 'Postback received']);
}