Magento 2 Payment Gateway Integration

I'm looking for a custom Magento 2 payment module that will seamlessly integrate with a specific payment gateway. The key features and timeline for this project are: - Compatibility with One-Page Checkout: The custom module should be designed to work smoothly with Magento 2's one-page checkout system. - Order Creation and Status: I need the module to create an order with a 'Pending' status. - Redirection to 3rd Party Website: After order creation, the customer should be redirected to a third-party website. The transaction parameters need to be encoded into a base64 string for security. - Timeframe: I would like this project completed ASAP. Upon clicking the Place Order button, the customer will be redirected to a 3rd party website with the order parameters base64 encoded as follows: $myData = array('name'=>$name ,'email'=>$email ,'amount'=>$totals ,'order_number'=>$order_umber ,'billing_address1'=>$line1 ,'billing_address2'=>$line2 ,'billing_address_city'=>$city ,'billing_address_state'=>$state ,'billing_address_zipcode'=>$zipcode ,'billing_address_phone'=>$phone ,'return_store'=>$return_store ,'expiration_time'=>$expiration_time ); $arg = base64_encode( json_encode($myData) ); $url = '[login to view URL]'.$arg; header('Location:'.$url);