`<?php
global $me;

$amount = (int)$_GET['amount'];

/**
 * @category    Example1 - Pay-Per-Product (single crypto currency in payment box)
 * @package     GoUrl Cryptocurrency Payment API
 * copyright    (c) 2014-2016 Delta Consultants
 * @crypto      Supported Cryptocoins - Bitcoin, Litecoin, Paycoin, Dogecoin, Dash, Speedcoin, Reddcoin, Potcoin, Feathercoin, Vertcoin, Vericoin, Peercoin, MonetaryUnit
 * @website     https://gourl.io/bitcoin-payment-gateway-api.html#p1
 * @live_demo   https://gourl.io/lib/examples/pay-per-product.php
 */

    require_once('engine/api/bitcoin/cryptobox.class.php');

    /**** CONFIGURATION VARIABLES ****/

    $userID         = $me['id'];                // place your registered userID or md5(userID) here (user1, user7, uo43DC, etc).
                                        // you don't need to use userID for unregistered website visitors
                                        // if userID is empty, system will autogenerate userID and save in cookies
    $userFormat     = "COOKIE";         // save userID in cookies (or you can use IPADDRESS, SESSION)
    $orderID        = "invoice00033";   // invoice number - 000383
    $amountUSD      = $amount;              // invoice amount - 2.21 USD
    $period         = "NOEXPIRY";       // one time payment, not expiry
    $def_language   = "en";             // default Payment Box Language
    $public_key     = ""; // from gourl.io
    $private_key    = "";// from gourl.io
    // IMPORTANT: Please read description of options here - https://gourl.io/api-php.html#options

    /********************************/




$options = array(
    "public_key"  => $public_key,         // place your public key from gourl.io
    "private_key" => $private_key,         // place your private key from gourl.io
    "webdev_key"  => "",        // optional, gourl affiliate program key
    "orderID"     => $orderID, // few your users can have the same orderID but combination 'orderID'+'userID' should be unique
    "userID"      => $me['id'],        // optional; place your registered user id here (user1, user2, etc)
    // for example, on premium page you can use for all visitors: orderID="premium" and userID="" (empty)
    // when userID value is empty - system will autogenerate unique identifier for every user and save it in cookies
    "userFormat"  => $userFormat,   // save your user identifier userID in cookies. Available: COOKIE, SESSION, IPADDRESS, MANUAL
    "amount"      => 0,         // amount in cryptocurrency or in USD below
    "amountUSD"   => $amount,         // price is 2 USD; it will convert to cryptocoins amount, using Live Exchange Rates
    // For convert fiat currencies Euro/GBP/etc. to USD, use function convert_currency_live()
    "period"      => $period,  // payment valid period, after 1 day user need to pay again
    "iframeID"    => "",         // optional; when iframeID value is empty - system will autogenerate iframe html payment box id
    "language"    => "EN"       // text on EN - english, FR - french, please contact us and we can add your language
);

// Initialise Bitcoin Payment Class
$box = new Cryptobox ($options);

// Display payment box with custom width = 560 px and big qr code / or successful result
$payment_box = $box->display_cryptobox(true, 560, 230, "border-radius:15px;border:1px solid #eee;padding:3px 6px;margin:10px;",
    "display:inline-block;max-width:580px;padding:15px 20px;border:1px solid #eee;margin:7px;line-height:25px;");

// Log
$message = "";

// A. Process Received Payment
if ($box->is_paid())
{
    $message .= "A. User will see this message during 24 hours after payment has been made!";

    $message .= "<br>".$box1->amount_paid()." ".$box1->coin_label()."  received<br>";

    // Your code here to handle a successful cryptocoin payment/captcha verification
    // For example, give user 24 hour access to your member pages
    // ...

    // Please create/use IPN (instant payment notification) function cryptobox_new_payment() for update db records, etc
    // Function cryptobox_new_payment($paymentID = 0, $payment_details = array(), $box_status = "") called every time
    // when a new payment from any user is received.
    // IPN description: https://gourl.io/api-php.html#ipn
}
else $message .= "The payment has not been made yet";


// B. Optional - One-time Process Received Payment
if ($box->is_paid() && !$box->is_processed())
{
    $message .= "B. User will see this message one time after payment has been made!";

    // Your code here - user see successful payment result
    // ...

    // Also you can use $box1->is_confirmed() - return true if payment confirmed
    // Average transaction confirmation time - 10-20min for 6 confirmations

    // Set Payment Status to Processed
    $box->set_status_processed();

    // Optional, cryptobox_reset() will delete cookies/sessions with userID and
    // new cryptobox with new payment amount will be show after page reload.
    // Cryptobox will recognize user as a new one with new generated userID
    // $box1->cryptobox_reset();


    /********************************************************************************************************/
    /**  This IPN function is used every time a new payment from any user is received successfully         **/
    /**  Function receives paymentID - current payment ID (record id in your mysql table crypto_payments), **/
    /**  payment details as array and box_status - 'cryptobox_newrecord' OR 'cryptobox_updated'.           **/
    /**                                                                                                    **/
    /**  Move this function to the bottom of the file cryptobox.class.php or create a separate file        **/
    /**  More info: https://gourl.io/api-php.html#ipn                                                      **/
    /********************************************************************************************************/
    function cryptobox_new_payment($paymentID = 0, $payment_details = array(), $box_status = "")
    {
        // Your php code here to handle a successful cryptocoin payment/captcha verification
        // for example, send confirmation email to user
        // update user membership, etc - https://gourl.io/api-php.html#ipn

        // .... ....

        return true;
    }

}

?>
<!DOCTYPE html><html><head>
    <meta http-equiv='cache-control' content='no-cache'>
    <script src='cryptobox.min.js' type='text/javascript'></script>
</head><body>

<?= $payment_box ?>
<?= $message ?>

</body>
</html>`

	if (!defined("CRYPTOBOX_PRIVATE_KEYS") || !in_array($this->private_key, explode("^", CRYPTOBOX_PRIVATE_KEYS))) die("Error. Please add your Cryptobox Private Key ".(CRYPTOBOX_WORDPRESS ? "on your plugin settings page" : "to \$cryptobox_private_keys in file cryptobox.config.php"));

$allkeys = run_sql('select * from `coinblock_usersettings`');

$cryptobox_private_keys = array();

foreach ($allkeys as $a){ $cryptobox_private_keys[] = $a->privateKey; }

define("CRYPTOBOX_PRIVATE_KEYS", implode("^", $cryptobox_private_keys));
unset($cryptobox_private_keys); 

$url = "http://currencies.apps.grandtrunk.net/getlatest/".$from_Currency.'/'.$to_Currency;
try 
{
    $ch = curl_init();
    curl_setopt ($ch, CURLOPT_URL, $url);
    curl_setopt( $ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt ($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)");
    curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, 20);
    curl_setopt ($ch, CURLOPT_TIMEOUT, 20);
    $rawdata = curl_exec($ch);
    curl_close($ch);
    if(is_numeric($rawdata)){
        $amount = ($rawdata * $amount);
    }else{
        $amount = 0;
    }
    return round($amount, 2);
} 
catch (Exception $e){
    $amount = 0;
    return round($amount, 2);
}

{
        "status": "error",
        "err": "Invalid data submitted",
        "box": "",
        "boxtype": "",
        "order": "",
        "user": "",
        "userformat": "",
        "period": "",
        "amount": "",
        "amountusd": "",
        "coinlabel": "",
        "coinname": "",
        "addr": "",
        "tx": "",
        "confirmed": "",
        "timestamp": "",
        "date": "",
        "datetime": ""
    }

{
      g: privateKeyHash,
      b: options.boxID,
      o: options.orderID,
      u: options.userID,
      l: options.language,
      e: period,
      i: options.ipAddress,
      h: hash,
    }

static async checkPaymentStatus(options: PaymentStatusOptions): Promise<any> {
    const privateKeyHash = crypto
      .createHash('sha512')
      .update(options.privateKey!)
      .digest('hex');

    const period = formatExpiryPeriod(options.period);

    const toHash = `${options.boxID}${privateKeyHash}${options.userID}${options.orderID}${options.language}${period}${options.ipAddress}`;
    const hash = md5(toHash);

    const data = {
      g: privateKeyHash,
      b: options.boxID,
      o: options.orderID,
      u: options.userID,
      l: options.language,
      e: period,
      i: options.ipAddress,
      h: hash,
    };

    const url = `https://coins.gourl.io/result.php`;

    const res = await axios.post(url, null, {
      params: data, // converts and attaches data as a query string
      headers: {
        'User-Agent': options.userAgent,
      },
      timeout: 20000,
    });
    
    return res.data;
  }