Configuration

The extension is configured in Settings > Extension Configuration > Configure extensions:

Explanation

Field	Description
Payrexx api key	Your Payrexx api key
Payrexx instance	Payrexx instance name
Currency	Currency to be used for the payment

Setup

A new payment option has to be added to the cart extension. It's done in the setup of the extension w4_payrexx:

plugin.tx_cart {
    payments {
        options {
            10 {
                title = Online payment (Mastercard, VISA)
                provider = payrexx
                extra = 0.00
                taxClassId = 2
                status = open
                type = payrexx
            }
        }
    }
}

But the values can be overwritten in your own setup. More info at https://docs.typo3.org/p/extcode/cart/8.2/en-us/AdministratorManual/Configuration/PaymentMethods/Index.html