payment gateway integration

A payment gateway is a merchant service provided by an e-commerce application service provider that authorizes credit card or direct payments processing for e-businesses or online retailers. The payment gateway may be provided by a bank to its customers, but can be provided by a specialised financial service provider as a separate service.

A payment gateway facilitates a payment transaction by the transfer of information between a payment portal (such as a website, mobile phone or interactive voice response service) and the front end processor or acquiring bank.