e commerce - how to autogenerate transaction ID during checkout in Opencart? -


i trying integrate payment gateway (www.sslcommerz.com.bd) in opencart requires submit transaction id @ time of checkout. transaction id needs stored in database , gateway save transaction id sort of future queries , cross checking online store system verification of payment completion. new opencart. can please give idea how should approach achieve that? in advance.

take @ 1 of other modifications payment gateways in version(s). paypal standard best option. see order id set in session variable generated checkout , can accessed in payment gateways' template file/through controller file. session variable is

$this->session->data['order_id']

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