Paypal IPN not executing license creation code - php

Question

Let’s get detailed…cause I’m stumped.
Server File structure:
/home/name/public_html/CryptlexApi.php
/home/name/public_html/generate-license.php see below
/home/name/public_html/generate-license-IPN_combined.php
/home/name/public_html/paypalIPN.php
source
generate-license.php:
<?php
require('CryptlexApi.php');
// pass this secret as query param in the url e.g. https://yourserver.com/generate-license.php?cryptlex_secret=SOME_RANDOM_STRING
$CRYPTLEX_SECRET = "SOME_RANDOM_STRING";
// access token must have following permissions (scope): license:write, user:read, user:write
$PERSONAL_ACCESS_TOKEN = "Yes, I have my PAT here";
// utility functions
function IsNullOrEmptyString($str){
return (!isset($str) || trim($str) === '');
}
function ForbiddenRequest() {
http_response_code(403);
$message['error'] = 'You are not authorized to perform this action!';
echo json_encode($message);
}
function BadRequest($error) {
http_response_code(400);
$message['error'] = $error;
echo json_encode($message);
}
function VerifySecret($secret) {
if($secret == $GLOBALS['CRYPTLEX_SECRET']) {
return true;
}
return false;
}
function parsePayPalPostData() {
$postBody['company'] = $_POST['payer_email'];
if(IsNullOrEmptyString($postBody['email'])) {
$postBody['company'] = "";
}
$postBody['quantity'] = $_POST['quantity'];
if(IsNullOrEmptyString($postBody['quantity'])) {
$postBody['quantity'] = NULL;
}
$postBody['email'] = $_POST['payer_email'];
if(IsNullOrEmptyString($postBody['email'])) {
BadRequest('email is missing!');
return NULL;
}
$postBody['last_name'] = $_POST['last_name'];
if(IsNullOrEmptyString($_POST['last_name'])) {
BadRequest('last name is missing!');
return NULL;
}
$postBody['first_name'] = $_POST['first_name'];
if(IsNullOrEmptyString($_POST['first_name'])) {
BadRequest('first name is missing!');
return NULL;
}
$postBody['order_id'] = $_POST['txn_id'];
if(IsNullOrEmptyString($postBody['order_id'])) {
BadRequest('reference is missing!');
return NULL;
}
return $postBody;
}
try {
if(VerifySecret($_GET['cryptlex_secret']) == false) {
return ForbiddenRequest();
}
CryptlexApi::SetAccessToken($GLOBALS['PERSONAL_ACCESS_TOKEN']);
$product_id = "this is my product id";
$postBody = parsePayPalPostData();
if($postBody == NULL) {
echo "no data \n";
return;
}
$email = $postBody['email'];
$first_name = $postBody['first_name'];
$last_name = $postBody['last_name'];
$quantity = $postBody['quantity'];
// required for renewing the license subscription
$order_id = $postBody['order_id'];
// creating user is optional
$user_exists = false;
$user = CryptlexApi::GetUser($email);
if($user == NULL) {
$user_body["email"] = $email;
$user_body["firstName"] = $first_name;
$user_body["lastName"] = $last_name;
$user_body["company"] = $last_name;
// generate a random 8 character password
$user_body["password"] = substr(md5(uniqid()), 0, 8);
$user_body["role"] = "user";
$user = CryptlexApi::CreateUser($user_body);
} else {
$user_exists = true;
}
echo "Quantity = $quantity \n";
// creating license
if($quantity != NULL) {
$license_body["allowedActivations"] = (int)$quantity;
}
$license_body["productId"] = $product_id;
$license_body["userId"] = $user->id;
$metadata["key"] = "order_id";
$metadata["value"] = $order_id;
$metadata["visible"] = false;
$license_body["metadata"] = array($metadata);
$license = CryptlexApi::CreateLicense($license_body);
http_response_code(200);
echo $license->key;
} catch(Exception $e) {
http_response_code(500);
echo 'message: ' .$e->getMessage();
}
Ok, So if I do the following in the terminal, I will successfully create a user/license
curl -d "payer_email=emailaddress%40gmail.com&quantity=1&last_name=smith&first_name=bob&txn_id=ordernumber" -X POST https://mywebsite.com/generate-license.php?cryptlex_secret=SOME_RANDOM_STRING
So, I take that code and put it in paypalIPN.php and renamed to generate-license-IPN_combined.php
In the paypalIPN.php file, I inserted the above code here:
// Check if PayPal verifies the IPN data, and if so, return true.
if ($res == self::VALID) {
######## I put all of my code above right here #########
return true;
} else {
return false;
}
The IPN code seems to work since the Paypal IPN simulator says it does. Nothing happens on the database side though. I’ve removed checks and even went as far as putting this code before the IPN but it’s not working. Please help.

Answer 1

A quick way to generate test IPNs in sandbox is to pay with a link of the form:
https://www.sandbox.paypal.com/webscr?cmd=_xclick&item_name=test&amount=100&currency_code=USD&business=sandboxbusinessemail#domain.com&notify_url={URL_ENCODE_YOUR_IPN_LISTENER_URL}
(Reference: HTML Variables for PayPal Payments Standard )
Get a sandbox business account to sub into the above, and a sandbox personal account to pay with, via: https://www.paypal.com/signin?intent=developer&returnUri=https%3A%2F%2Fdeveloper.paypal.com%2Fdeveloper%2Faccounts%2F
Review the business account's IPN history via: https://www.sandbox.paypal.com/webscr?cmd=_display-ipns-history