Bitcoin payment system not working

Question

The code for callback:

<?php 
$id =""; 
$pw = "";

$secret = "f8fe526080ec3366eddbb498c6df4e1a"; //md5 hash a unui cuvant 
$address = "1MBF4cGmVac3r561YYRcamqJKN269yk7aD";

if($_GET['secret'] != $secret){ 
echo "Invalid"; 
return; 
} 

if($_GET['mainaddress'] != $address){ 
echo "Invalid"; 
return; 
} 
if (!isset($_GET['btc'])){ 
echo "Invalid"; 
return; 
} 
if (!isset($_GET['value'])){ 
echo "Invalid"; 
return; 
} 

$price = $_GET['btc']; 
$value= $_GET['value'] / 10000000;

if ($price >= $value){ 
$email = "email@yahoo.com"; 
$subject = "Payment Received"; 
$body = "Payment received for invoice #". $_GET['invoice'] . "\r\n" . "Price: " . $price . " BTC" . "\r\n"; 
$headers = "From: GoBets <sales@gobets.pw>". "\r\n"; 
$headers .= "Content-type: text/html\r\n"; 

$mail = mail($email, $subject, $body, $headers);

}else{ 
$mail2 = mail($email, "rekt","hdhdhd",$headers); 
}

if($mail){ 
echo "*ok*"; // return code pentru blockchain 
}

if ($mail2){ 
echo "*ok*"; 
} 


?> 

The code to create address and set callback:

<?php
session_start();
$secret = "f8fe526080ec3366eddbb498c6df4e1a";   // md5 hash of a word
$address = "1MBF4cGmVac3r561YYRcamqJKN269yk7aD";

if ($_GET['test'] == true) {
    echo 'Ignoring Test Callback';
    return;
}

if (isset($_GET['key'])) {

    if ($_GET['key'] == "p1") {
        $price_in_usd = 1;
    } elseif ($_GET['key'] == "p2") {
        $price_in_usd = 4.5;
    } elseif ($_GET['key'] == "p3") {
        $price_in_usd = 8;
    } elseif ($_GET['key'] == "p4") {
        $price_in_usd = 15;
    } elseif ($_GET['key'] == "test") {
        $price_in_usd = 0.3;
    } else {
        echo "Invalid param. Please contact an administrator or try again later";
        return;
    }

    if (!empty($price_in_usd)) {
        // Simulate BTC conversion and QR code generation since actual URLs are removed
        $price_in_btc = $price_in_usd * 0.000025; // Example fixed conversion rate
        $invoice = $_SESSION['s_ID'] . "-" . rand();
        $input_address = "simulatedBTCAddress123"; // Simulated BTC address
        $qrcode_data = "bitcoin:" . $input_address . "?amount=" . $price_in_btc;

        echo '<div align="center">';
        echo '<div>[QR CODE IMAGE HERE]</div>'; // Placeholder for QR code
        echo "Invoice #: " . $invoice . "<br>";
        echo "Please send <b>" . $price_in_btc . "</b> BTC to <b>" . $input_address . "</b><br>";
        echo "</div>";
    }
} else {
    echo "Something went wrong!";
}
?>

This is not working. Need help.

Answer 1

I found the problem, it was actually the callback.php script. You are checking for this:

if ($price >= $value)

which basically means

if price to be paid > price paid then payment is succesful

which iss wrong, change it to:

if ($value >= $price)

and this should solve your problem.