Opencart: paypal duplicate transaction protection.

Created on 22 Dec 2013  路  2Comments  路  Source: opencart/opencart

opencart misses the txn_id validation before submitting an order.

See:
https://developer.paypal.com/webapps/developer/docs/classic/ipn/integration-guide/IPNIntro/

Look for:
If the payment_status is Completed, check the txn_id against the previous PayPal transaction that you processed to ensure the IPN message is not a duplicate.

picture ghost

All 2 comments

never had this problem so i'm not including it.

danielkerr picture danielkerr on 22 Dec 2013
👎3

it's not a problem, it's a "protection" !

ghost picture ghost on 22 Dec 2013
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